US1673201A - Door-operating mechanism - Google Patents

Description

June 12, 1928.

E. T. PEARSONS DOOR OPERATING MECHANISM Filed April 5, 1926 4 Sheets-Sheet l a 7G, Inn Mr! 7 W4 47' r0 aws y June 12, 1928.

E. T. PEARSONS DOOR OPERATING MECHANISM Filed April 5, 1926 4 Sheets-Sheet 2 HN 63 NN @BH Mm llvllunl June 12, 1928.

E. T. PEARSONS DOOR OPERATING MECHANISM Filed April 5, 1926 4 Sheets-Sheet 3 Jun 12, 1928. 1,673,201

E. T. PEARSONS DOOR OPERATING MECHANISM Filed April 1926 4 Sheets-Sheet 4 I N VEN TOR.

WJW V,BY

ATTORNEY.

Patented June 12, 1928.

UNITED "STATES 1,673,291 PATENT QEF L ZLE- ERNEST T. PEARSONS, OF CLEVELAND, OHIO, ASSIGNQR TO THE BAKER-RA ULANG- eoMPAnY, or" CLEVELAND. oriro, AfofoR'ronA'rIoN' or onto;-

DOOR-OPERATING MECHANISM.

Application filed April 5, 1926. ,Serial No. 98,980.

the opposite'side thereof to facilitate the 'movement: of the, passengers past the operative either in entering or leaving the vehicle and for other reasons.

One object of the invention isto provide improved and relatively simple operating and controlling mechanisms for a door permitting the latter to be disposed at any point in the vehicle body remotefrom the operatives position while insuring easy and positive operation of swinging the door in either directionand latching and unlatching it by the operative.

Another object of the invention is to pro vide animproved door latching and unlatching mechanism in which provision is made .7501 preventing thelatc-hing of the door exce tb v operation of the handle or other operating device, thereby preventing the complete closing and latching ot' the door from outside of the vehicle.

Another object of the invention is to construct a vehicle in which the door and the operating devices are separated from each other and to connect the door and operating devices by an improved mechanism of relatively simple construct ion and capable of b ing incorporated in the walls of the vehicle in a; ready manner, whereby braces,

operating links or levers within the vehicle are a oided and increased space results.

A further object of the invention is to provide an improved door operating and latching mechanism in which is provided a nornriill retracted latch and an operating element interposed in the operating connections whereby the latch is first operated in the opening movement of the-door to effect release thereof from its keeper and isoperated at the end of-the closing movement oi the door-"to efiect the latching of the latch behind its'lreeper.

Other objects of the invention will be apparent to those skilled in the art to which myinvention relates from theiollowing description taken in connection with the accompanying drawings, wherein. i

Fig. l is a fragmentary View of a vehicle, partly in plan and partly in section.

Fig. 2 is a fragmentary section of the vehicle wall, enlarged, and showing the con trolling devices and a portion of the operating mechanism with portions thereof in section.-

,Fig 3 is a section on the line 33 of Fig.

Fig. a is a section on the line,l4 of ,Fig. 5 is a section on the line 55 01' Fi i V i I I i Fig. 6 is asection on the line 66 of Fig. 2. 5

- F ig. 7 is a fragmentary sectional View showing the door in closed position, door latch in latching position, a portion oi the operating mechanisn'r and the latch control lingmeans. I i

Figs. 8 and 9 are sections on the lines 8 8 and, 9+9, respectively, ofFig. 7.

Fig. 10 is at'raementary view of the vehicle side wall adjacent the' door, looking toward the 'right ot F 7 Y Fig. 11 is a fragmentary sectional View of the parts shown inF 7, but showing the position of the. latch and the controlling means theretor, either at the time, the, latch ls operatedto release thejdoor to openit or at thetime the door is closed but before these means are operated to position the latch behind itskeeper. v

'Fig. 12 is atragmentary section similar to Fig. 7, butflsh owingthc door open.

Figi 13 a section on the line 13.13 of Fig. 12. i i i I ig. l l is a section onthe line l4-14t of Fig. 12. l

'In.the drawings, 1 indicates a vehicle, preferably of the bus type. The vehicle may be of any standard or special rot-in of construction, or similar to thatdisc losed in the co-pending application filed by Edward J. Stahl on December 5, 192"; Serf No. v 73,433, see Letters Patent; No. 1,6292%. The'v'ehicle comprises a body'l mounted on suitable wheels (not shown) andjtlie' necessary equipment and inechanisn'is for pa v pelling and steering it'in a well knownmanner. The body 1 is preferably the closed type, having a floor; 1*, side wal1s-1",a' frame 1 forming'a continuation of th'eside" walls forward end of the flooring and adjacent the left side wall of the body l, as is customary in vehicles of this type, and the door 6 being disposed in the right side wall thereof and toward the rear.

However, it will be understood that the door 6 may be arranged at any desired point remote from the operatives seat. I The door 6 is preferably hinged along that side edge thereof nearest the operative, to simplify the operating mechanism and its connection therewith, suitable hinges 6 being provided between such edge and the adjacent portion .of the sidewall 1 and a suitable keeper 7 being provided in the side wall 1 adjacent the free side edge of the door 6, whereby the latch 8, which'is preferably mounted to slide endwise on the door, will latch the door closed or release it, whereby the door may be opened.

9 indicates acasting fashioned to provide a base 10 having wings 10' which are suitably secured to the bar 1 (preferably to the right of the operatives seat B and the steering wheel C), a bracket 11 and a casing member 12in spaced relation to the bracket 11. The casing member 12 is provided with a flange 13 to which the flange 14 of a casing member 15 is removably secured by screws 16. and 15 and the bracket 11 are formed with aligned openings 12, 15 and 11 respectively, and the walls of the openings 11 and i 15 are screw threaded to receive screw threaded plugs 11", 15, respectively. The plugs 11*, 15 serve as bearing elements for .a shaft 16. By preference, I form in the inner ends of the plugs 11, 15", and opposite ends of the shaft 16 substantially semispherical recesses or sockets 17 and interpose between each shaft end and the inner end of the adjacent plug arelatively large ball 18, whereby friction in the bearings is reduced; the recesses being so disposed that the centers of the balls will be in alignment with the axis of the shaft 16. Each plug '11", 15 is provided'with a kerf 19, whereby it may be engaged by a suitable tool and rotated, the effect of which operation will be i to move the plug endwise and adjust the adjacent bearing. By providing .screw plugs as mountings for both ends of the shaft 16,

they may be operated to raise or lower the The walls of the casing members 12' shaft to any desired position. As shown in the drawings (Fig. 3), the casing member 15 is provided. with a hollow boss 20 the opening in whichreceives the plug 15".

As shown in Fig. 3, the casing members 12, 15, are (1) shaped to form a chamber 10 to receive and enclose a power element, pref erably a sprocket 20, which is suitably keyed to the shaft- 16 and is preferably supported thereby in spaced relation to the inner walls of'the casing members; and (2) secured together in a liquid tight manner so that a suitable lubricant may be placed in the chamber 10, if desired. The purpose of the sprocket will later appear.

21 indicates a crank having a hub 21 fitting between the casing member 12 and bracket 11, and suitably keyed to the shaft 16.

The outer portion of the crank is. hollowed out to enclose a plunger 22; and the inner portion adjacent the hub 21' may be offset- (as shown at 21 toposition the plunger in the plane of the bracket 11, whereby the plunger 22 may engage recesses (to be later referred to) formed therein to control the movement and positioning of the crank 21; the off-set 21 is formed with an opening 21 which serves, as a guide for the outer portion of the plunger 22. Rearwardly of the off-set 21 the plunger 22. has an enlarged portion 22 the purpose of which is (1) to form a shoulder to abut the inner wall of the off-set 21 and thus limit the inward movement of the plunger and (2) provide an abutment for the inner end of a compression spring 23 which normally tends to move the plunger inwardly; the outer end of the spring engages a pair of spaced lugs 23 disposed at either side of the plunger 22. The Outer end of the plunger 22 carries a. lug 24 to which is pivoted a crank arm 25 on the lower end of a shaft 26, rotatably mounted in a suitable bearing 27. The bearing 27 is formed in tip-standing integral walls 28 at the outer end of the crank 21. The upper end of the shaft 26 forms a handle 26'- for the operative to grasp, whereby the shaft 26 may be rotated, such operation serving to retract the plunger 22 against the tension of the spring 23. The handle 26 is provided witha collar 28 engaging the upper end of the bearing 27 and cooperating with a nut 29 screw threaded on the lower portion of the shaft and engaging the lower portion of the bearing 27 to hold the shaft therein against endwise movement. The crank arm 25 is also preferably threaded on the lower end of the shaft 26 and locked in position by a nut 30. To permit of the swinging movement of the crank 25, the plunger 22 is formed in sections and these sections are pivotedvtogether by a pin 22 (see Fig. 3).

31, 31, indicate recesses formed in the side wall of the bracket 11, the former recess be ingpositioned to receive th'e'inner free end of the plunger 22' when the crank 21 is moved to the position to completely open the door 6' through an operating mechanism, indicated as an entirety at 32, and the latter recessbeing positioned to receive the free end'of the, plunger 22 when the crank 21 moved to the position to completely close the door and cause the latch 8 to en'- gage or be projected behind the keeper 7. Intermediate the recesses 31, 31, the side wall of the bracket 11 is formed With a slot 33 to receive the free end of the plunger 22 and the end Wall of'the slot 33 adjacent the recess 31 forms a stop 33-which limitsfthe movement of'ihe crank'2l and -he'nce"p'revents the door 6 from being completely closed, so that it cannot be closed from the outside of the body 1 orin anymannerexcept by the retraction of the plunger'22 and further movement of the crank 21.

Of the operating mechanism 32, 34 indicates a thrust member preferably. comprisingaflexible section 35,'adapted to conform and accommodate itself to the straight and curvilinear Walls constituting the body Walls-1 1, a reciprocating bar 36 slidably supported infthe'wall 1 adjacent the door 6 and connected at its-inner end to the flexible section--35 anda link 37 pivotally connected at its inner end to the outer end of the bar 36-and-meansj, indicated as an entirety at 38 for controlling the latch 8. The controlling means 38 are connected to the'outer end of the link 37 and-operated by the crank 21 and the thrust member 34' in the manner to be later set forth. The inner end of the flexible member 35=terminates in a sprocket. chain, which is arranged to engage With and be operated by the sprocket 20, By preference, the entire length-of the flexible section 35 is madeupof a single section of sprocket cha'in,'-such construction simplifying the assembly" and construction of the flexible member and its guide'39 and providing for anti-friction bearings on the flexible member for-rolling engagement Withthe Walls of the guide 39;

As Will be understood, the sprocket chain comprises sidebars connected by pi-ntles and rotatable sleeves 353surrounding the latter, whichsleeve's slide between or roll on spaced guide surfaces 39 provided Within the guide'39'." As' will be noted in the drawings, the'guide surfaces 39 are spaced apart sufficiently to receive between them the sleeves andto guide them'through the channel, Withoutfpermitting buckling of the chain links or vibration thereof to cause rattling The guide 39 comprises a pair of related bars or strips 39, 39, Which are shaped or-bent'to conform to the front and side vvalls ofthe'body, being preferably secured to'the bars 1?. 1" (see Figs. and 6) The inner strip 39' may be secured to the bars and the outer strip/then secured toit, as shown in Fig. 5. The in n' erop posingavails of the strips 39 arechann elc'd to form the guide surfaces 39 and grooves 39 at either side thereof to provideample space for the moveinent of'the sidebars of the chain links Without rubbing engagement with the strips. The inner end of the guide 39 is connected to the casting in any suitable manner and its guide channel with" a similarly shaped channel formedin a sleeve 40"extending tangentially ot, the pitch circle of the sprocl'ret'and merging into the chamber 10, whereby the chain is gui'ded' to and from the sprocket 20 Without danger of it buckling. As will be understood from Figs. 2 'antl"3, theside walls of the chamber 10" are disposed' relatively close and conce'ntric'to the freeends' the sprocket teeth, sothatth'e chain ismaint ained in operative rltition'to t he"sp'i'ocl-:et2-0" when the latter is rotated ineitlier direction by the crank 2l. l he-sle eve lt) fits'ivithin an p-enrngei formed iirthe'thickened Walls of the casing member s ie; 15' (see'Fig. l-). Atfits'o'ut'cr end,'--the"chain35 is'p'ivotally connected to the slide bar '36, which is shapedin cross secslidably fit the channel between the strips 39; A portion of the outer strip 39", extending inwardly from its outerendiscut away, as shown at 42, in the pla neof the link 37, 'sothafltlie'latter is] free to "swing inwardly to the position shoii'n in 'l' 'and 11, Whichposition it occupies when-the door 6 iscl0sed.

the latchcontrolling means 38," l3indicates ayrojd' threaded at its outer end into ascreW threaded opeiiing4 l forn'id in'the inner endbfjtliedat'ch 8 and locked in their adjusted relation by anut l5f The inner en'dbf the rod screw threaded into the outer end i of'a tubular mental-4c, the inner end ofwhich terminates in a lug or knuckle (see 'll ig'. The knuckle t? is pivoted to one end of a rocket 48', truunionecl at' l-8 between the upper and loiver Walls of a casing' 49 The casing-49m secured 'to the inner side of" the door 6 and'preferably extends to the free side edge thereof to en close' the"tubular m'e'iiiber 4-6, rod 43 "and inneri'portion of tliejllatch 8'01." a suitable guide 8"tlierefor. The opposite end of the rocker '{l ;8fis pivotal'ly connected to the outer end of the linkBT; 50 indicates 'an angle plate fixed to the inner side Wall of the casing d Qj'the lateralflange of the plate being bifurcated and straddling' the rod 43to forn r an"abutment 50. 51 indicates a coiled spring surrounding the rod l3 and interposed,- between the abutn'ient 50? and I a u-asliei f52' sealed hgainst .tlie oiiter end of thetulmlarmeniber {it The purpose of the spring filjis to act on the tubiilai" member 4.6 and tln'ongli it and? the rod43 to normally hold the latch in "retracted position,

lit)

' erably strong enough to move thelatch 8 to the position shown in and the rod 13 connected thereto, and operating mechanism 32 and crank 21 to the position shown in Fig. 11, unless these parts are held by the operative, so that upon the rotation of the handle 26 to release the plunger 22 from the recess 31, the spring 51 will move the rod 13 inwardly and it in turn will swing the rocker 18 to the position shown in Fig. 11. By imparting to the spring sutlicient strength to operate these parts, it will insure immediate release of the latch 8 from the keeper 7 upon the disengagement of the plunger 22 from the bracket 11.

Operation: Figs. 1 and 7 show the position of the parts when the door 6 is closed and latched. In this position the plunger 22 is projected into the recess 31, which locks the shaft 16 and sprocket 20 against movement, and the latch 8 is locked behind the keeper 7. If now the handle 26 1S rotated clockwise, the plunger 22 will be moved out of the recess 31 whereupon the spring 51 will move the latch 8 inwardly to Fig. 11; then move ment of the handle 26 and crank 21 to the position shown in dotted lines in Fig. 1 and full lines in Fig. 2, will swing the door 6 to its full open position, in which position the plunger 22 projects into the recess 31 and locks the door against movement. Release of the plunger 22 and movement of the crank 21 in the opposite direction will close the'door 6. As hereinbefore set forth the door will become closed see Fig. 11) when the plunger 22 engages the stop 33, but since the spring 51 is strong enough to prevent relative movement. of the operating parts, and outward movement of the latch 8, the latter remains in its retracted position during the operation of the crank 21 to close. the door. To latch the door 6, it is necessary to swing the crank 21 a further distance, to thereby rock the rocker 48, overcome the tension of the spring 51 and push the latch 8 behind the keeper 7 In moving the crank 21 to effect this movement last mentioned, the plunger 22 is brought into registry with the recess 31 and then projected therein, the effect of which will be to lock the latch 8 in latching position.

lt will be noted that the plunger 22 and recesses 31, 31, constitute a trigger mechanism to retain the door 6 locked or fully open. By providing additional recesses, the door can be locked in any intermediate position.

It will be noted that if the swinging of the door to closed position is resisted, by

lack of lubrication in the hinges 6 or by reason of the factthat the vehicle .is standing on an inclined surface, the resistance so set up will overcome the tension of the therein.

' indicates a plunger spring 51 and accordingly the pull on the thrust member will operate to compress the spring and project the latch outwardly, and the latter will thereby engage the outer surface of the body and .prevent the door from being closed. To prevent this condition and operation, I have provided an automatic lock and release means (indicated as an entirety at 52) for the latch 8, whereby it is normally locked in its retracted position following the opening of thedoor 6 and it remains locked until the door approaches its closed position, when the latch is released to permit the operating means and thrust member to project it. into engagement with the keeper 7. Accordingly, by the provision of the lock and release means the pull on the door to close it is transmitted therethrough to the door instead of the spring which retracts the latch. Of the lock and release means 52, 53 indicates a collar adjustably fixed to the tubular member 16. 54 indicates a frame mounted on the door 6 within a chamber 6 formed 55 indicates a flat spring secured atone end to the inner wall of the frame and carrying near its free end alug 56 adapted to engage the collar 53 to lock it against movement. outwardly due to the operation of the crank 21 and thrust member f 32 when they are'operated to close the door 6. The collar 53 and lug 56 are so disposed that when the latch 8- is retracted under the influence of the spring 51, the

collar 53 will ride the inclined side face of the lug 56 and come to rest behind its end wall, whereupon the lug 5 1 will return to its normal position in the path of movement of the collar and thus lock it and through it and the rod 43, lock the latch in retracted position. The free end of the spring 55 is bent laterally-to form an inclined surface, the purpose of which will later appear. 57 slidably mounted in aligned openings formed in lugs 58, which are provided on the frame 5 1. The plunger is made in sections 57 57", threaded together whereby itslengthcan be adjusted. The section 57 is provided with a flangeor annular shoulder, so that (1) a coiled spring 59 interposed, between the inner lug .58 and said flange normally operates to press the plunger endwise and (2) the flange may engage the outer lug 58 to limit the movement of the plunger 57 under the influence of the spring 59. As shown, the plunger is normally arranged to project beyond the inner side edge of the door, which position it occupies when the door 6 is open (see Fig. 12), but when the door is closed, the plunger 57 is in effect pushed inward due to its eiigageii'ient with the body side wall 1" (see Fig. 7). At its inner end, the plunger 57 carries a wedge 60 disposed in the path of movement of the inclined wall on the free lSO end of the spring 55. Accordingly, as the door moves toward its closed position, the wedge 6O will engage the spring 55 and swing it laterally (see Fig. This movement moves the locking lug .56 out. of its locking position and releases the collar 53, so that the rod 43 andlatc'h '8 are free to 'be' actuated outwardly.

Fig. 7 shows the door closed, with the latch '8 in latching position. If the handle 26 and crank :21'a're operated to 'open the door, the plunger 57 I will slide outwardly and the latch will slide inwardly. In this movement of the latch, the collar 53 will move to a position 'behind'the lug 56 see Fig. 11).

In thelclosing movement of the door, these parts will remain in this locked relation until the door 6 approaches its closed position, whereupon the plunger will 'be arrested by its engagement with the side wall 1, so that in-the further or continued movement ofthe door the spring 55 will be "engaged by'the wedge '60 and moved to release the lug 56 from the collar 53; then following the complete closing of the door 6, the operation-oi thrust member will project the latch 8 outwardly, against the tension of the spring 51, into position behind the keeper 7, as already set forth.

From the foregoing description it will be seen that the latch is locked in its retracted positionand such locking provides in effect a positive connection between the thrust and pull member 32 and door 6, whereby the lat-' ter may be closed irrespective of the resistanceto such operation due to any cause whatsoever that may at any time exist; but that as the door approaches its closed position, the lock is released to permit the free actuation of the'la tch.

To those skilled in the art to which my invention relates, many changes in construction and widely differing embodiments and applications thereof will suggest themselves without departing from the spirit and scope of the invention. My disclosures and the description herein are purely illustrative and are not intended to be in any sense limiting.

lVhat I claim is:

1. In a vehicle, the combination with a body having a door, a keeper on the body and a movable latch on the door, of means for normally maintaining said latch in a retracted position, and mechanism for operating said door to open or closed position, said mechanism including relatively movable elements arranged to project said latch behind said keeper following the closing of the door.

2. A vehicle as claimed in claim 1 in which said relatively movable elements operate to disengage the latch from the keeper before efiecting opening of the door,

3. A vehicle as claimed in claim 1 in which a locking means is provided to lock t'he operating mechanism and through itloCk said latchinengagement with said keeper.

4:. Tlie'combination with a "vehicle pro vided with a 'wallhaving an"opening,'a door for closing said opening,'-a keeper carried by said wall adjacent said opening and a latch slidably mounted on said door, 01' means acting on :said latch to normally maintain it out of en a ement with said keeper, a rocker pivoted o'n said door and havingone end connected tothe inner end-oi said latch, and an operatingmechanism connected to the other end of said rocker and arranged to operate the latter and through said rocker to effect disengagement of-said latch from said keeper through these elements to move said door to open position.

5. In mechanism of the class described, the combination of asupport having a bracket and a casing member disposed in spacedrelation, a separate casing member 'jconiiected to said first mentioned casing" 'n'iemb'er to form a chamber, the walls 'ofsai-d casing members and said bracket be'ing formed with aligned openings, bearing elements positioned in the openings formed in said bracket and said separate casing member, a shaft extending th'r'ough'the opening in the first mentioned ca-sing member and engaging said ,eleinents, a driven element within said chamber and'conn'ected to said shaft, and a driving element between said bracket and said first'mentioned casing member and connected to said shaft;

6. A mechanism as claimedin claim 5 in which said bearing elements are screw threaded into their respective supporting openings.

7 A mechanism as claimed in claim 5 in which a ball is positioned between the inner end of one o t said bearing elements and the adjacent end of said shaft with its center in line with the axis of the latter and their ends are formed with recesses to partially receive said ball. i

8. A mechanism as claimed in claim 5" in which the driving element consists of a crank having. an oft-set to position its outer portion in the plane of said bracket, and a trigger mechanism having interengaging elements carried by said crank and said bracket.

9. In a vehicle, the combination with a body having a door, of an operating device supported by the body at a point remote from said door, and an operating mechanism between said device and said door, said mechanism including a rotatable element connected to said device, a flexible thrust member operatively connected to the door at its outer end and adapted to Wind on and off said rotatable elementat its inner end, and a guide for said member having 0p and operating liJO posed walls, with which the intermediate portionsof said member engage.

10. A vehicle as claimed in claim 9 in Which t-he rotatable element comprises a sprocket and the flexible member consists of a sprocket chain having pintles that slidably engage the opposed walls of said guide.

7 11. A vehicle as claimed in claim 9 in which the lrotatable element comprises a sprocket and the flexible member consists of a chain and the guide for the latter is shaped to engage only the opposite sides of the pintles for the chain links.

12. In a vehicle. the combination with a body having a door, of an operating device supported at a point remote from said door,

and an operating mechanism between said device and said door, said mechanism com prising a rotatable element operated by said device, a flexible member arranged to wind on and oii said element at one end, a slid able bar connected to the other end of said flexible member, a guide coextensive with maybe transmitted endwise, through said flexible member, anda linkage between said bar and said door.

13. In a vehicle, the combination with a body havinga door in one wall'thereof, of

an operating device supported adjacent another wall of said body, a winding element connected to said device, a continuous guide carried by the walls ofsaid body and conforming to the shape thereof and leading'from said element *to a. point adjacent said door, aflexible member arranged to wind on and oflsaid elementat one end and slidably fitting and extending through said guide, whereby the power of said winding element may be transmitted endwise through said flexible member when it is reciprocated in said guide, and a connection between the opposite end of said flexible member and'saiddoor.

1 1. A vehicle as claimed in claim 9 in.

' which the rotatable element comprises a guide comprises spaced guide surfaces arranged to engage the oppositesides of said sleeves and through them guide said chain endwise. l

15. In a vehicle, the combination with a body having a door, of an operating device supported on said body at a point remote from said door, a flexible member operatively connected to said door and said device and arranged to be moved endwise by the latter as a thrust and pull element to open and close said door, and a guide having opposed walls engaging intermediate portions of saidflexible member.

16. A vehicle as claimed in claim 1 in which means are provided for automatically locking said latch in retracted position when the door swings open and for releasing it from the locking elements when the door moves into closed position.

17. A vehicle as claimed in claim 1 in which means, dependent upon the position of the door, automatically locks the latch in retracted position and release the same for projection. behind its keeper. 7

18. A vehicle as claimed in 'claim 1 in which said door is provided with a catch serving to engage said latch to lock it in retracted position and a spring pressed plunger normally disposed in operative relation to said catch and in position to engage the body when the .door is closed,

whereby the closing of the door will operate said plunger and effect a release of the catch from said latch.

19. In a vehicle, the combination with a body having a door and a keeper, of a normally retracted latch, slidably mounted on the door, means for locking said latch in retracted position, means for operating said door to open and closed positions, and means for releasing said locking means as the door approaches its closed position, said operating means being operatively con nected to said latch whereby it may be moved into engagement withsaid keeper.

subscribed my name.

ERNEST T. PEARSONS.

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