US 3149810 A
Description (OCR text may contain errors)
A. N. PARUOLO MOVABLE MOUNT Sept. 22, 1964 Filed Feb. 5, 1962 Sept. 22, 1964 N. PARUQLO MOVABLEII MGUNT 2 Sheets-Sheet 2 Filed Feb. 5, 1962.
lnited States Patent O 3,149,810 MVABLE MOUNT Anthony N. Pamolo, Norridge, Ill., assignor t Advertising Metal Display Co., Chicago, Ill., a corporation of Tillinois Filed Feb. 5, 1962, Ser. No. 171,241 8 Ciaims. (Cl. 248-124) This invention relates `to `a readily movable or port able mount, and more particularly relates to a readily movable mount for a window air conditioner. The mount is so constructed as 4to be manually pulled or pushed from room to room with ya minimum of effort and is adjustable to conform with the sills of windows disposed at varying distances from the floor level. This application is a continuation-in-part of my co-pending application Serial No. 120,879, which was filed lune 20, 1961, now Patent Number 3,095,173.
Window air conditioners are normally adapted to cool certain limited volumes of air within a house. Usually a window air conditioner is of such co-oling capacity that it is able to cool the air within the room in which disposed to a desired temperature. Because of the limited cooling capacity of window air conditioners, the cooling effect is not realized in rooms located some distance from the conditioner.
Due to the weight and size of the normal window air conditioner, it is usually inserted by means of a permanent or semi-permanent installation in a window of a room in which cooling is particularly desired. Quite often air conditioners are permanently installed in the windows of bedrooms whereby the temperatures within such room are maintained comfortably low during hot summer nights. However, during the day, little or no benefit from such a bedroom conditioner is obtained by a housewife working in a distant kitchen or living room and, consequently, the conditioner may lbe `.allowed t-o remain non-operative until night.
It is desired that a window air conditioner be readily movable into and installed with ease in a minimum amount of time in any desired room of the house in which cooling eects are desired. Thus, a single air conditioner could eiiiciently cool a room, such as -a living room, during the daytime and 4be moved to a bedroom to cool the latter room during the night. It is also desired that the height of such air conditioner be readily adjustable in the vertical plane on a supporting mount, with a minimum of effort, in the normal course of use.
It is an object of lthis invention, therefore, to provide a novel, movable mount particularly `adapted lto assist in readily moving a window air conditioner to a desired window location in a house or office, adjacent which cooling effects are desired.
It is another object of this invention to provide a movable mount for a window air conditioner which is adapted to readily position a supported `air conditioner elative to a variety of Window openings normally found in a home or other building structure.
It is a further object of this invention to provide a readily movable mount for an air conditioner which is so constructed as to assure ready movement of such air conditioner d-isposed thereon over plane surfaces with substantially no danger of tipping the mount or the air conditioner mounted thereon.
It is still another object of this invention to provide a readily movable mount for lan air conditioner which is simple and lightweight in structure, and although adjustable, of sturdy construction so as to move and suppont in safety window conditioners of substantial size and Weight.
It is yet another object of this invention to provide a novel mount for an air conditioner or the like, which 3,1itilll Patented Sept. 22, 1964 Fice not only facilitates movement thereof, but which also funct-ions as an integral part of the installation, dispensing with additional supporting structure cost and installation.
It is another object of this invention to provide a mount construction employing novel locking sleeves which prevent extensible frame portions from moving or vibrating relative to supporting frame portions, thereby assuring Ia sturdy assembly in all positions of use.
It is another object of this invention to provide a novel movable mount, particularly adapted for the support of window `air conditioners, which may readily tilt the conditioner so as Ito drain water collected in the sump thereof out the window or into a collecting receptacle prior to moving the conditioner yand mount.
It is another object of this invention to provide a movable mount in which the carriage portion thereof supporting an air conditioner or the like may be readily moved relative to an underlying supporting frame portion by a novel crank and pulley arrangement, as will hereinafter be explained in greater detail.
The above and other objects of this invention will become more apparent from the following detailed description when read in the light of the accompanying drawings and appended claims.
In one embodiment of this invention, a readily movable mount, particularly adapted for use with a window air conditioner, is provided. Such mount comprises a irst lower frame portion having spaced, vertical tubular members in which spaced rod or tube portions of an upper frame member and of lesser diametric dimensions are telescopically received. Superposed transverse channel members, one of which is connected to lower frame portions engaging the vertical tubular members of the lower frame member, and the other of which is connected to the upper frame member, assist in maintaining the telescopically engaging elements of the frame assemblies in fixed spaced relationship.
Opposed parallel guide means are secured to upper, substantially horizontal portions of the upper Vframe assembly and supportingly engage opposed carriage means, reciprocally movable in the horizontal plane, on which an air conditioner may be mounted. A rotatable threaded rod member threadedly engaging a tapped block mounted on -t-he lower transverse channel and connected at its upper end limit to the upper transverse channel comprises a regulating means whereby the position of the upper frame portion may be adjusted relative to the underlying frame portion.
A drive pulley 4spaced from the threaded rod is journaled in a bracket secured to an undersurface portion of the upper transverse channel and is centrally connected to a crank projecting toward the front of the mount. A second pulley is keyed to an upper portion of the threaded rod and interconnected with the rst pulley by means of a belt. Thus, cranking of the drive pulley readily enables the upper transverse channel and the mount upper frame portions movable `therewith to be readily positioned relative to the mount lower frame portions.
A latch pivotally mounted on the guide means enables a fixed relative disposition to be effected with the carriage means when the latter means Iare disposed at one end limit of -their reciprocal movement. When the carriage means are at the opposed end limit of their reciprocal movement, the carriage means and air conditioner mounted thereon may be pivoted through an angle suicient to discharge substantially all of the water contained in the air conditioner sump, as will hereinafter be eX- plained ingreater detail.
In the normal course of use, the mount which is readily manually pulled or pushed with the assistance satanic of casters mounted on the lower frame portion thereof is moved adjacent a window from which an air conditioner disposed on the mount is to project. The vertical position of the air conditioner is regulated by the threaded rod after which the conditioner may move into the window opening by means of the horizontally movable carriage members, as will hereinafter be explained in greater detail.
For a more complete understanding of this invention, reference will now be made to the drawings wherein:
FIGURE l is a perspective view of a movable mount for an air conditioner or the like formed in accordance with the teaching of this invention;
FIG. 2 is a fragmentary perspective view of a novel pulley and crank arrangement employed in the movable mount of FIG. l;
FIG. 3 is a side elevational view of one embodiment of the movable mount of this invention illustrated with the carriage means thereof supporting an air conditioner in a tilted condition;
FIG. 4 is a fragmentary perspective view of one of the carriage members employed in the movable mount of this invention;
FIG. 5 is a fragmentary perspective view, partially broken away, illustrating the two positions of the latch means employed on one guide member of the provided movable mount;
FIG. 6 is a perspective view of one of the guide members of the movable mount of this invention and engaged mount portions fragmentarily shown; and
FIG. 7 is a fragmentary elevational view, partly in section, illustrating a locking sleeve for assuring tight relative engagement between the telescoping `frame members of the provided mount.
Mount Frame Referring now more particularly to FIG. 1, a mount 10, particularly adapted to support a window air conditioner and assist in readily moving the same over substantially level surfaces is illustrated. The mount is seen to comprise a lowermost tubular frame element 12, which is substantially rectangular in configuration, on which four casters 14 are mounted at corner portions thereof. The casters are freely pivotal about their pintles and, accordingly, mount 10 may be readily pushed or pulled in any direction on a plane surface.
Supported in substantially vertical planes on opposed portions of the lowermost tubular frame element 12 are opposed parallel, Vertical frame elements 16 which may be Welded at 17, or otherwise suitably axed, to the underlying frame element 12. Bent tubular elements 1S reinforce the connection between vertical elements 16 and frame element 12 and are welded to element 12 at 20 and to frame members 16 at 22.
Each tubular element 16 telescopically receives one of opposed leg portions 24 of an integral frame tubular member 26 in the manner most clearly seen in FIGS. 1 and 3. Frame elements 18 are maintained in spaced relationship, by means of transverse channel 2S which may be secured at opposed end limits to frame elements 1S by screws 32 or other equivalent securing means.
Because of manufacturing tolerances, slight relative movement is generally permissible between the lower vertical frame elements 16 of the mount 10 and the upper frame element 24, which are telescopically received therein. Since the diameters of the receiving openings in the element 16 are larger than the external diameters of the elements 24, locking sleeves 11, illustrated in FIG. 7, are employed having female threads 13 formed thereon. It is the function of the threads 13 to engage male threads disposed on the upper end portions of the two vertical frame elements 16 of the mount lil. The locking sleeves 11 in the course of threadedly engaging threads 1S urge tapered bushing 17, retained to the sleeve by at spring 19, into the interval between the telescopically engaging elements. The bushing 17 is urged into place after an air conditioner or other item supported by the mount is at a desired elevation. The bushing 17 may be of nylon or other plastic which is wear-resistant and will assist in eecting a tight, relatively immovable engagement between the two frame members 24 and 16.
As a result of the locking sleeve assembly illustrated in FIG. 7, the frame of the movable mount 1t) is substantially rattle-free, even in the course of movement. The sturdy 'assembly` in which the members 2d of the upper frame assembly are centrally disposed in the lower frame elements 16 assure desired horizontal disposition of the upper frame components and the air conditioner or other item supported thereon.
Mount Guides Secured to horizontal arm portions 34 of the upper frame tubular element 26, by nut and bolt assemblies 38 or other equivalent means, are opposed guides 36 (see FIGS. 3 and 6). A transverse tubular portion 4t), more clearly seen in FIGS. 1 and 6, interconnects horizontalY portions 3d of each tubular frame member 26.
A transverse channel 42, most clearly seen in FIGS. l and 6, maintains opposed parallel portions 3d of frame member 25 in parallel, spaced relationship, and as will be noted from FIG. 6, may be secured to guides 36 and frame tubular portions 34 by nut and bolt assemblies 44 or other equivalent securing means. Thus, upper frame member 26, transverse channel d2 and the opposed parallel guides 36 will move as a unit relative to the underlying frame elements 16 in which lower vertical portions 24 of the upper frame member 26 are telescopically received.
Each guide 36 comprises ak vertical rectangular surface 8,0 integrally formed with a horizontal rectangular surface 82, as illustrated in FIG. 6. An inwardly projecting, elongate lip S4 is integrally formed with the upper edge of each guide surface and is slotted at 86 to enable handle portion 98 of latch $8 pivotally mounted on surface S6 by means of rivet 90 to project therethrough. An eye 92 punched from a latch portion engages one end of a coil spring 94, which is anchored to an eye 96 punched from guide surface Sti at an opposed end limit, as is more clearly seen in FIGS. 5 and 6. Spring 94 urges the latch 88 to move about pivot 90 until handle portion 9S engages an underlying portion of lip 84, as illustrated in FIG. 6.
Cemented or otherwise suitably affixed to opposed end portions of guides 36 are plastic projections 102 and 104 of nylon or similar material for purposes of effecting a low coeicient of friction with the engaged surface portions of a carriage assembly slidably moving thereover.
Frame Regulating Means It will be noted from FIG. l that the transverse channels 28 and 42 are in superposed relationshipin the vertical plane. Therefore, threaded rod 46, most clearly seen in FIGS. l, 2 and 3, may serve as a connecting means for regulating the interval between the upper portions of mount 1t) and the lower frame portions thereof.
Because of the telescopic engagement between frame leg portions 24 and tubular members 16, the upper portions of the mount It? are extensible relative to the lower frame portions thereof. Threaded rod 46 threadedly engages tapped nut 4S xedly mounted on lower transverse member 28. Since the upper terminal limit of rod 46 is rotatable relative to transverse channel 42, but does not axially move relative thereto, rotatable movement of rod 46 will raise or lower channel 42 (depending upon the direction of rod rotation) and the other mount elements movable therewith relative to transverse channel 28 and the lower frame elements of the mount. It will be noted from FIG. 1 that the upper end limit of rod 46 is of reduced cross-sectional dimensions and sesnaai cured to channel 42 by means of cotter pin and washer assembly Si). The point of engagement between the rod and channel 42 is spaced fiom the channel center and corresponds to the center of gravity of the supported air conditioner to be disposed thereon.
Keyed to an upper portion of rod 46 is a grooved pulley 52 which is spaced from pulley 54, see FIG. 2. The latter pulley is rotatably mounted on shaft 56 journaled in bearings 58. The bearings are mounted on opposed faces 60 of a bracket 62 which is secured to an undersurface portion of transverse channel 42 by means of screws 64, more clearly seen in FIG. l. It will also be noted from this latter figure that the screws 64 may longitudinally move along the channel in slots 66. The adjustability of the interval between pulleys 54 and 52 enables desired tension to be imparted to belt 68 interconnecting the same.
Shaft 56 of pulley 54 comprises a terminal arm portion of a hand crank 70, more clearly seen in FIGS. 1 and 3. Rotary actuation of crank '7d rotates pulley 54 and connected pulley 52, resulting in vertical axial movement of rod 46. Crank 70 is downwardly inclined as a result of the angular disposition of the bracket faces 60 to the supporting channel 42. Crank 70 may be readily actuated by a person standing erectly in front of the mount, and the carriage 36 and air conditioner supported thereon raised or lowered, as desired. A shield 53 for the shaft and pulley assembly may be secured to the undersurface of the channel 42 by screws 55 or equivalent means, see FIG. 2. The shield has a cut out 57 formed therein for passage of crank arm 56.
Mount Carriage Members Reciprocally movable over the upper surface portions of the mount guides 36 are spaced members 120, more clearly seen in FIGS. 1 and 4. The carriage members are maintained in xed spaced-apart relationship by means of connecting tubular member 122, which is secured at opposed end portions to channels 124 of each carriage member 120 by means of screws 126, see FIG. 4, or other equivalent securing means.
Each channel 124 extends between terminal flange portions 128 and 129 of each carriage member. The flanges are integrally formed at right angles with a vertical surface portion 135 having spaced apertures 132 formed therein. The channels 124 are spot-welded or otherwise suitably affixed to carriage surfaces 136. The apertures enable a securing means to traverse surface 1311 in the course of engaging an air conditioner, such as air conditioner 134 illustrated in FIG. 3. In the latter ligure, screws 136 are illustrated which traverse surface 130 of the illustrated carriage member for purposes of engaging tapped apertures in the air conditioner.
Formed integrally with the upper edge end limit of surface 130 of carriage member 120 is an elongate lip 138 disposed at substantially right angles to both wall surface 13u and the end flanges. Spaced from lip 138 on the end portion of the carriage wall surface 130 oppositely disposed to handle 122 is an angle member 141B, which is spot-welded or otherwise suitably secured to surface 130 so that upper projecting edge 142 is disposed substantially parallel to lip 13S defining a channel or passageway 144 within which lip 34 of a guide 36 may reciprocally move in a manner apparent from FIG. 5.
It will be noted from the latter figure that the length of each carriage member' 121i is substantially greater than the length of each guide 36 of the movable mount. Consequently, each carriage 120 and attached channel 124 may reciprocally move over plastic projections 102 and 104 of FIG. 6 relative to the supporting guide; the end limits of such reciprocal movement are defined by engagement of end flanges 12S and 129 of the carriage with the longitudinal end limits of the guide members. In the course of this movement the channels 124 serve as spacers 6 maintaining a desired interval between the vertical walls of the guides and adjacent carriage members.
As seen in FIG. 5, a normally horizontally disposed surface 143 is formed integrally with vertical wall surface 1311 of each carriage member and serves to engage the bottom of an air conditioner or other object which is supported by the carriage member. As will also be seen from FIG. 5, a vertical projecting stop 150 is punched from central web portion 152 of the channel 124.
When the carriage members 121i are pulled by means of handle 122 until ange 129 engages a distal end limit of guide wall 80, flange 129 will function as a stop preventing further relative movement between the guides and carriage members. In the process of effecting the latter stopping action, the bottom end portion 154 of the pivotally mounted latch 8S, which is offset in the manner illustrated in FIG. 5 so as not to engage opposed leg portions of channel 124, is pivoted by contacting the arcuate edge surface of stop 150. The latch portion 154 rides over the latter stop surface and reassumes a vertical position after passing the stop so as to assume the position shown in FIG. f5.
In the position of FIG. 5, the carriage member 121B may only slightly move relative to the supporting guide 36 a distance indicated by the interval between stop ange 129 and the adjacent end of guide wall Sti, which interval is identified by reference member 158. The latter interval is necessary to allow latch means 88 to be pivotally moved into the dotted line position illustrated in FIG. 5 when it is desired to push carriage members 120 relative to guides 36 by means of handle 122.
In the relative disposition of FIG. 5, the carriage is in a locked condition which would normally be employed for moving an air conditioner on the mount within the room to a new location. However, upon arriving at a window it would be desired to push the carriage and air conditioner mounted thereon into the window opening. Thus, after the carriage has been elevated to the proper height by means of crank '70, locking latch S8 is pivoted to the dotted line position of FIG. 5 enabling the Vcarriage members to be pushed by handle 122 relative to the guides 36.
It is one of the functions of the channels 144 defined by portion 142 of angles 140 and lip 138 of each guide 120 to prevent relative movement in the vertical plane between the guides and the carriage members and thereby provide a more stable, rattle-free construction. It will be noted from FIG. 5 that in the locked position, lip 84 of each guide is disposed between lip 138 and underlying portion 142 on the angle member 141i of an adjacent carriage member.
It is seen from FIG. 3 that when the carriage assembly is pushed by means of handle 122 a certain longitudinal distance relative to the supporting guides 36, lip 84 of each guide will no longer engage the angles and, as a result, the entire carriage assembly will be able to pivot relative to the supporting guides in the manner illustrated in FIG. 3. Such pivoting action is desired prior to moving an air conditioner, after operation, from one location to another.
After a period of operation, a quantity of water, as large as two quarts, may accumulate in a pan sump disposed in the air conditioner portion normally disposed in the window opening. In order to prevent splashing of this accumulated water on a floor surface in the course of moving the air conditioner, it is desired to tilt the air conditioner so as to drain the water in the sump through drain openings normally present in the conditioner face surface disposed outwardly in a window opening. FIG. 3 illustrates a draining operation prior to moving the conditioner and mount to a new desired location. The water may be drained out the window or into a receptacle.
It is noted from FIG. 3 that the difference in length between the guides 36 and the carriages 121! enables the tilting action above described to take place. In addition, the .length difference facilitates engagement between the carriage members and the air conditioner inasmuch yas there is no necessity for a securing means traversing the guide means. Each opening i321 in the carriage means is directly accessible to the securing means by merely pulling the carriage means to the opposed end limits of its permissible reciprocable movement.
in the position of FlG. 3 the carriage means are securely locked to the guide means since the inwardly projecting lips 8d of the guides 36 define an interval within which the interposed carriage assembly is securely retained. As indicated in FlG. 3, tilting will be effected about the axis defined by the edges of the guide means disposed furthest from handle 332 of the carriage assembly. Since in the extended carriage position the center of gravity of the air conditioner and carriage assembly will be disposed on or adjacent to the pivot axis, the conditioner maybe tilted and returned to the horizontal position with a minimum of ei'l`ort. The maximum angle of carriage tilt will be determined by the height of the guide walls Sil, which defines the distance through which the carriage will tilt before guide lip 84 engages channel 124.
After the draining operation illustrated in FIG. 3, the carriage assembly and air conditioner mounted thereon may be pivoted back into the horizontal position and pulled by means of handle i223 until the locking position of FIG. 5 is reached. The tilting action of FIG. 3 may not be effected until the locking lever is raised into the dotted line position of FIG. 5, which position is also illustrated in FIG. 3. Pivotal movement of the latch 8S enables underlying channel portion 24 of the carriage assembly to upwardly move without engaging portion 154 of the latch.
Normal M mmf Use in Installation In the normal course of use the mount and air conditioner assembly are moved to a desired Window location. Prior to moving the mount and `air conditioner assembly, the upper carriage assembly in the locked position of FIG. 5 isA retracted to the lowermost position relative to lower frame elements i6 by hand crank 7i). With the low center of gravity, the danger of tipping the mount and air conditioner assembly in the course of movement is minimized. The frame sleeves l1 are loose during frame adjustment and tightened during mount movement.
Upon arrival at a desired window opening the sleeves il are loosened, and the conditioner and engaged carriage assembly are raised by hand crank '70 until the bottom surfaces of the carriage members are one-half inch above the sill of the window in which the conditioner will be disposed. Handle 98 of latch 88V is pivoted upwardly into the dotted line position of FiG. 5, enabling the carriage members to move outwardly a desired distance beyond Vthe guide terminal edges into the window opening. To assist in this carriage pushing action, a foot of the person installing the air conditioner may engage ribbed member composed of rubber or other non-skid material disposed on the tubular portion of frame portion 12 disposed beneath handle 12?.. After extending outwardly a desired distance the air conditioner is lowered by rod do, through actuation of crank 7i), so that the distal ends of the carriage members i213 rest on the sill. The window sash is lowered and any expandable adapter eliminating exposed area between the air conditioner and window opening is inserted in place. Normally the carriage members in the extended position will have the guide lips 85 `disposed in a portion of the channels 144 contributing to the stability of the installation.
After the air conditioner is locked in place the carriage assembly and conditioner may be moved upwardly a slight distance. This latter movement is suiiicient to give the air conditioner a slight downward tilt toward the room exterior facilitating drainage of the moisture removed by the air conditioner to the room exterior.
It is seen, therefore, that a novel movable mount construction has been provided employing a carriage possessing a novel tilting action; the latter tiltability enables an CII air conditioner to be drained prior to moving over a door surface preventing splashing of water removed by the conditioner ontol the floor surface.
The provided movable mount also possesses a readily accessible hand crank enabling the carriage assembly and upper frame portions to be readily positioned at a desired height relative to the supporting lower frame portions.
Still further, it is apparent that the difference in length between the carriage means and the guide means of the provided mount not only enables the tilting action to take place but, in addition, facilitates engagement between the carriage means and the member mounted thereon inasmuch as the securing. means need not traverse the guide means.
Without further elaboration, the foregoing will soV fully explain the character of my invention that others may, by applying current knowledge, readily adapt the same for use under varying conditions of service, while retaining certain features which may properly be said to constitute the essential items of novelty involved, which items are intended to be definedl and secured to me by the following claims.
l. In a movable mount construction the combination comprising first frame means, second frame means extensible relative to said first frame means, guide means connected to spaced portions of said second frame means, spaced carriage means hav'mg a greater length than said guide means reciprocally slidably movable over said guide means, means interconnecting said spaced carriage means,
means for maintaining said carriage means in substantially parallel relationship with said guide means until said carriage means extend beyond the terminal ends of said guide means a predetermined distance when said carriage i means are moved in one direction of their reciprocal movement; said carriage means being tiltable relativeto said guide means when no longer maintained in parallel relationship with saidy guide means and when extended beyond the terminal ends of said guide means said predetermined distance.
2. Amovable'mount construction comprising frame means, spaced parallel guide means connected to said frame means, spaced parallel carriage means of greater length than said guide Vmeans reciprocally slidably movable over said guide means supporting said carriage means. each slidably engaging pair of guide means and carriage means having projecting edge portions arranged in overlapping relationship with the edge of said carriage means disposed uppermost, and means secured to at least one of said carriage means extending along a portion of the length of the carriage means to which secured and defining in part a passageway with the carriage means projecting edge portion for reception of said guide means projecting edge whereby tilting of said carriage means relative to said guide means is prevented until the means secured to said carriage means defining in part a passageway for reception of said guide means edge is completely extended beyond the terminal ends of said guide means.
3. A movable mount construction comprising frame means, parallel guide means supported on said frame means adjustably positionable in the vertical plane, parallel carriage means of greater length than said guide means supportably and slidably mounted on said guide means and adapted to reciprocally move thereover, means mounted on said carriage means maintaining said carriage means in the plane of said guide means during a portion of the reciprocal movement of said carriage means relative to said guide means; said carriage means being tiltable on the distal ends of said guide means when said carriage means are at one end limit of their reciprocal movement, and discrete means mounted on said carriage means and said guide means cooperating in the normal position of assembly to prevent movement of said carriage means relative to said guide means into the tiltable position of said carriage means in one direction of reciprocal movement of said carriage means; at least one of said discrete means being movable into a position allowing slidable movement of said carriage means into the tiltable position.
4. In a movable mount the combination comprising frame means, parallel guide means maintained in fixed spaced relationship supportably mounted on said frame means, spaced parallel carriage means maintained in fixed spaced relationship for supporting an object mountable thereon, said carriage means being adapted to be reciprocally movable over said guide means; said carriage means being of greater length than said guide means, each of said guide means having a horizontal elongate surface disposed at substantially right angles to an elongate, upwardly extending wall, a narrow elongate lip integrally formed with at least a portion of said upwardly extending wall superposed over said horizontal surface in substantial parallel relation therewith; each of said carriage means having an elongate horizontal surface disposed at substantially right angles to an elongate upwardly extending wall, elongate spacer means of uniform width secured to said carriage means wall and projecting therefrom in a direction opposite to that of said carriage means horizontal surface, said spacer means having a horizontal surface interposed between the vertical walls of said carriage means and said guide means, said vertical walls being in parallel relationship in the normal position of assembly; said spacer means and said carriage means horizontal surfaces being slidably movable over said guide means horizontal surfaces; said carriage means being pivotally movable about distal edges of said guide means horizontal surfaces, the end limit of said pivotal movement being defined by an engagement between said spacer means and the elongate lips of said guide means.
5. The movable mount of claim 4 in which flange means are formed integrally with the opposed ends of said carriage means vertical walls and project in the direction of said guide means a suicient distance to engage the opposed ends of said guide means vertical walls thereby defining the end limits of the reciprocal movvement of said carriage means relative to said guide means.
6. The movable mount of claim 4 in combination with a latch pivotally mounted on one of said guide means vertical walls so as to pivot thereabout in one direction of rotation parallel to said walls, means mounted on said one vertical Wall biasing said latch into a position in which the lower end portion thereof is disposed adjacent the spacer means of said carriage means whereby said carriage means may not pivot about the distal edges of said guide means horizontal surfaces until said lower end portion is pivoted into a position spaced from said spacer means.
7. The movable mount of claim 6 in which a stop projection is secured to the upper surface of said spacer means preventing slidable movement of said spacer means and carriage means past said latch in one direction of said carriage means slidable movement.
8. In a movable mount construction the combination comprising spaced guide means having elongate, substantially vertically disposed wall portions connected at substantially right angles to elongate horizontal surface portions projecting from said wall portions in the direction of the opposed guide means, an elongate narrow lip integrally formed with the upper end limit of each of said guide means vertical wall portions disposed in parallel overlying relationship with said guide means horizontal surface portions, carriage means having horizontal and vertical wall portions corresponding to said guide means portions mounted on said guide means horizontal portions for slidable reciprocal movement relative thereto, handle means maintaining said carriage means in ixed spaced relationship, each of said carriage means having a spacer means secured to a vertical wall portion oppositely disposed to the horizontal surface portions thereof and interposed between the vertical wall portions of said guide means and carriage means, said spacer means being adapted to maintain said carriage means and said guide means vertical wall portions in spaced relationship, said carriage means being pivotally movable about the distal edges of Said guide means horizontal surface portions oppositely disposed to said carriage handle means, the end limit of said pivotal movement being defined by an engagement between the guide means lips and said carriage spacer means; latch means pivotally mounted on a vertical wall portion of said guide means biased into a iirst position preventing upward pivotal movement of said carriage means relative to said guide means and pivotally movable into a second position permitting said upward pivotal movement, and stop means formed in said spacer means preventing slidable movement of said carriage means past said latch means in the first position when said carriage means moves in one direction of its reciprocal movement.
References Cited in the tile of this patent UNITED STATES PATENTS 1,230,819 Gall June 19, 1917 2,076,309 Whedon Apr. 6, 1937 2,614,610 Camisa Oct. 21, 1952