US 3055721 A
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Description (OCR text may contain errors)
p 1962 w. E. HOLT 3,055,721
REVOLVING MORTAR BOARD Filed June 15, 1961 2 Sheets-Sheet 1 INVENTOR.
Sept. 25, 1962 w. E. HOLT REVOLVING MORTAR BOARD Filed June 15 1961 4 a 4/ 6V .1 z
: Z 3/ J a? a 29 424 a 7 I if j Z; T Z6 i 2 Sheets-Sheet 2 INVENTOR.
United States Patent Ofifice 3,55,7Z1 Patented Sept. 25, 1962 3,055,721 REVOLVING MORTAR BOARD Walter E. Holt, Loris, S.C. Filed June 15, 1961, Ser. No. 117,455 1 Claim. (Cl. 31132) This invention relates to a revolving table or mortar board which is adapted to be used for holding plaster, mortar or the like in order to facilitate the use of such material during various types of building or construction work.
It is a general'object of the present invention to provide a novel and improved revolving mortar board, and more specifically it is an object of the invention to provide a revolving mortar board which includes parts which can be readily taken apart when the device is not being used, and wherein the top member of the revolving mortar board is adapted to be covered with a suitable matevrial such .as a suitable piece of metal so as to insure that the mortar being supported thereon will not become dried out by having its moisture absorbed into the wooden surface of the top member, and wherein another important object of this invention resides in the provision of an interengaging means on a rotary top member and a post therebelow for helping to insure that the rotary top member is properly centered and aligned.
The present invention has as a still further object to provide a device which will be exceedingly simple in construction and may accordingly be produced at mod erate cost.
Other and incidental objects will appear hereinafter.
In the drawings:
FIGURE 1 is a side elevational view of the revolving mortar board, constructed according to the present invention.
FIGURE 2 is a sectional view taken on the line 2-2 of FIGURE 1.
FIGURE 3 is an enlarged bottom plan view of the top member showing the top member removed from the stand.
FIGURE 4 is a top plan view of the stand per se, with the top member removed.
FIGURE 5 is a sectional View taken on the line 55 of FIGURE 2.
FIGURE 6 is a fragmentary top plan view showing the position of the lugs or ears before these lugs are bent upwardly to receive the rollers therebetween.
FIGURE 7 is a fragmentary perspective view of the center post with the guide member thereon, and with parts broken away and in section.
FIGURE 8 is a fragmentary perspective view showing the upper end of one of the legs.
FIGURE 9'is a fragmentary perspective view showing a portion of the track for engagement by the rollers.
Referring in detail to the drawings, the numeral 20 indicates the revolving mortar board of the present invention which is shown to comprise a stand that is indicated generally by the numeral 21, and the stand 21 includes a horizontally disposed lower circular base 22. As shown in thedrawings the base 22 includes a horizontally disposed circular portion 23 as well as a vertically disposed annular section 24 which extends upwardly from the outer periphery of the circular portion 23. The stand 21 further includes .a plurality of similar legs 25, and each of the legs 25 includes an intermediate vertically disposed portion 26 as well as an arcuate lower portion 27, and the lower portions 27 are secured to the horizontally disposed circular portion 23 of the base 22 as for example by means of rivets or securing elements 28. The upper portions of the legs 25 are curved as at 29, and the upper ends of the legs 25 terminate in flat sections 30 which have apertures 31 therein, FIGURE 8, and suitable securing elements such as rivets 32 are adapted to be extended through said apertures 31 in order to secure a horizontally disposed ring member 33 in place contiguous to the flat sections 30.
Extending upwardly from the ring member 33 and secured thereto or formed integral therewith are a plurality of spaced apart pairs of apertured ears or lugs 34, and a roller 36 is journaled between each pair of lugs 34 by means of .an axle or pin 35, for a purpose to be later described.
As shown in the drawings there is provided a vertically disposed post 37 which is arranged so that it is secured between the intermediate portions 26 of the legs 25 by means of securing elements such as the bolts 38, and the numeral 39 indicates a tapered guide member which is affixed to the upper end of the post 37.
The numeral 40 indicates a circular top member which is rotatably supported above the stand 21, and the top member 40 includes a main body piece 41 made of wood or the like, and the numeral 42 indicates a metal covering which extends completely across the wooden main body piece 41, and a portion of this metal cover as indicated by the numeral 43 also extends completely around the outer periphery of the main body piece 41, and this metal material as indicated by the numerals 42 and 43 serves to insure that moisture will not be absorbed from the mortar on the top member so that for example the mortar will not become dried out by having its moisture absorbed by the wooden material 41.
The numeral 46 indicates a circular body element which is secured to the lower intermediate portion of the top member 40 as for example by means of securing elements or screws 47, and there is provided in the central portion of the body element 46 a recess or opening 45 which registers with a recess 44 in the body piece 41, and these registering recesses 45 and 44 are adapted to define or provide an interengaging means which is such that the tapered guide member 39' is received therein in order to help maintain the top member 40 properly centered .and aligned during the use thereof.
There is further provided a circular track 48 which is secured to the lower surface of the top member 40, and the track 48 is provided with apertures or openings 49 whereby suitable securing elements such as screws 50 can be extended through the apertures 49 and into engagement with the top member 40 in order to retain the track 48 secured to the lower surface of the top member 40. The track 48 is shaped to include an annular or circular groove 51 for engagement by the rollers 36.
From the foregoing, it will be seen that there has been provided a revolving mortar board or table which is especially suitable for use in connection with various types of building or construction work, and in use with the parts arranged as shown in the drawings, mortar or the like is adapted to be arranged on the top member 40, and due to the rotary supporting means for the top member 40, the top member can be revolved or rotated in order to bring the mortar into a convenient position in order to facilitate the use thereof by the workmen. The device 20 of the present invention includes the base 22 which is constructed so that it provides a firm support for the entire unit so as to minimize the possibility of the device accidentally tipping over. The base 22 includes the portion 23, and the lower ends 27 of the legs 25 are securely aflixed to the portion 23 as at 28, and the post 37 is secured between the intermediate portions 26 of the legs 25 as at 38. With the rollers 36 journaled between the lugs 34 by means of the pins 35, and with the track 48 secured to the lower surface of the top member 40 by means of the securing elements 50, it will be seen that the interengagement between the rollers 36 and the groove 51 of the track 48 serves to insure that the top member 40 can revolve or turn with a minimum amount of friction so that the top member can be readily rotated to the desired location in order to permit the most advantageous and convenient use of the mortar or other material thereon. The body element 46 is secured as at 47 to the lower portion of the top member 40, and the recess 45 and recess 44 in the elements 46 and 41 are of a shape and size so as to snugly receive therein the upper portion of the tapered guide member 39 whereby this interengaging means will serve to insure that the top member will be properly centered and aligned above the stand 21.
When the device is not being used, or when it is desired to move the device from place to place, the top member 40 can be readily lifted up off of the stand 21 so that the device will occupy less space in order to facilitate storage or movement of the device from place to place. 1
In FIGURE 6 there is illustrated a part of the ring member 33 with the apertured lugs 34 integral therewith, and FIGURE 6 shows the position of the lugs 34 before they are bent up to their final position as for example FIGURE 2 shows the normal or final position of the lugs 34 which is in a vertical plane relative to the horizontal plane of the ring member 33.
The rollers 36 and associated parts are arranged or spaced so as to insure that the top members 40 will have a firm support whereby the top member will not wobble or move out of its proper position even though a relatively heavy load is .applied thereto, and the rollers 36 engage the groove 51 to insure that the top members 40 will rotate and revolve in the desired manner. The flat sections 30 at the upper ends of the legs 25 provide a level support for the horizontal ring member 33, and the ring member 33 has the lugs 34 extending upwardly therefrom whereby the rollers 36 can be journaled between the lugs.
Any suitable material can be used for making the various parts or elements, and it is to be understood that the various parts can be made in different shapes or sizes as needed or desired.
It is to be noted that according to the present invention the member 39 defines a pivot for the revolving top member 40, and the top member 40 is readily demountable from the stand, and in addition the rollers 36 are disposed about the pivot 39 as set forth in the drawings.
The axles 35 which support the rollers 36 may consist of smooth round pins with a head on one end and an opening on the other end for receiving a cotter key. The pedestal legs 25 are adapted to be made of channel iron. The guide member 39 serves to help support the center of the board and also aids in setting the track on the rollers.
The board of the present invention is especially suitable for use by workmen engaged in handling plaster, tile or the like, and it is to be noted that the board consists of two pairs that can be readily separated, that is the top member 40 can be separated from the stand 21, and the top member can be readily separated from the stand 21 or readily assembled thereon, and this makes it quite convenient when it is necessary to move the device through doorways from one room to another.
4 The top portions 42 and 43 are adapted to be made of a suitable material such as aluminum, galvanized steel or the like in order to prevent the moisture from being absorbed out of the plaster by the wood 41.
Since the board or top member 40 can rotate or revolve, the person working with plaster, tile or the like can conveniently mix his gaging plaster in with the other plaster. This process of mixing must be done on the mortar board, and not in the mortar box. Since the member 40 can be turned around, it eliminates the necessity of the plaster or tile man from walking over staging boards, to go around the plaster board, and this all around mixing of the materials is essential since the gaging must be thoroughly mixed.
The present invention can be made in several different sizes as for example a plaster board may be made thirtytwo inches high and forty-two inches in diameter, and the tile board may be made thirty-two inches high and thirty inches in diameter. The stand may be twenty inches high, and the dimensions may be varied as desired or required.
Although the invention herein described is fully capable of achieving the objects and providing the advantages hereinbefore mentioned, it is to be understood that it is merely illustrative of the presently preferred embodiment of the invention and that it is not to be limited to the details of construction herein described, other than as defined in the appended claims.
What is claimed is:
A device of the character described comprising a stand embodying a horizontally disposed circular base which includes a horizontally disposed circular portion and a vertically disposed annular section which extends upwardly from the outer periphery of said circular portion, a plurality of similar legs each including intermediate vertically disposed portions and an arcuate lower portion which is afi'lxed to the horizontally disposed circular portion of said base, the upper portions of said legs being curved and terminating in upper flat sections, a horizontally disposed ring member secured to said flat sections, spaced apart pairs of apertured lugs extending upwardly from said ring member and secured thereto, rollers journaled between said lugs, a vertically disposed post having a portion thereof secured between the intermediate vertically disposed sections of said legs, a tapered guide member mounted on the upper end of said post, a horizontally disposed circular rotary top member comprising a main body piece having a covering extending thereover, a circular track secured to the lower surface of said top member and said track including an annular groove for engagement by said rollers, a circular body element arranged below said top member and secured thereto, there being registering openings in said body element and top member for receiving therein said guide member.
References Cited in the file of this patent UNITED STATES PATENTS 705,903 Bullock July 29, 1902 913,110 Eccleston Feb. 23, 1909 1,142,480 Bell June 8, 1915 2,459,017 Crew Jan. 11, 1949 2,669,117 Fuhrmann Feb. 16, 1954 2,680,660 Stephens June 8, 1954