US3160453A

US3160453A - Rotating dor and shelf for corner cabinets and the like

Info

Publication number: US3160453A
Application number: US146168A
Authority: US
Inventors: Leslie E Tassell
Original assignee: TASSELL HARDWARD Co
Current assignee: TASSELL HARDWARD Co
Priority date: 1961-10-19
Filing date: 1961-10-19
Publication date: 1964-12-08
Anticipated expiration: 1981-12-08

Description

Dec. 8, 1964 L. E. TAssELL 3,160,453

ROTATING DOOR AND SHELF FOR CORNER CABINETS AND THE LIKE Filed 001;. 19, 1961 2 Sheets-Sheet 1 hull /1 Z6- 5 i D I INVEN TOR.

2J 4 /7 Y f5/ff i 70650/ iff-f- @MW AT TORNEY Dec. 8, 1964 L. E. TAssELL 3,160,453

ROTATING DOOR AND SHELF FOR CORNER CABINETS AND THE LIKE Filed 0G15. 19, 1961 2 Sheets-Sheet 2 INVENTOR. e5/ 7256 e// AT TORN EY United States Patent Oilice 3,166,453 ROTATING D001?. AND Simili FOR CORNER CABINETS AND TEE LIKE Leslie E. Tassell, Grand Rapids, Mich., assignor to Tasseli Hardware Company, Grand Rapids, Mich. Filed Oct. 19, 1961, Ser. No. 146,168 13 Claims.. (Cl. S12-23S) This invention relates to improvements in rotating door and shelf for corner cabinets and .the like. The principal objects of this invention are:

First, to provide a mounting for a right angled corner door which will permit the swinging edges of the panels of the door to be cut square and without bevel and still swing in closely fitting closing relation to the end walls of a corner cabinet in which the door is mounted.

Second, to provide a mounting plate and coacting corj ner bracket which can be mounted at the top and bottom of a corner door and cabinet to removably and swingably mount the door in a corner cabinet.

Third, to provi-:le a novel mounting bracket which is attachable to a pair of door vpanels arranged at right angles to each other to connect the adjacent edges of the panels and retractably support a pivot pin in parallel closely spaced relation to the line of intersectionof the panels.

Fourth, to provide a mounting bracket attachable to two corner door panels arranged at an angle to each other, the bracket having a pivot pin reciprocably mounted therein and adjustably supported on a cam lever to support the pin in either projected or retracted position relative to the end of the bracket and the ends of the door panels.

Fifth, to provide a rigid and economical segmental circular shelf which is easily attached to two corner door panels to connect the panels at a right angle and be supported thereby around approximately 270 about the panels.

Sixth, to provide a mounting plate and coacting corner bracket for a corner door that are reversible to mount at -the top or bottom of the door and to permit the use of relatively thick or thin door panels while providing a spring position.

Seventh, to provide sturdy and economical shelf, pivot bracket 'and mounting plate hardware which will permit a cabinet maker to assemble .an angle door of either of two thickness panels with rotating shelves in close tting relation in a corner cabinet.

Eighth, to provide amounting plate and coacting door bracket which can be mounted by a cabinet maker at the top and bottom of an angled corner door and provide holding detents to restrain the door in closed position` while permitting swinging in either direction.

Other objects and advantages ofthe invention will be plate, door pintle bracket and shelf as mounted in aY corner cabinet.

FIG. l is a fragmentary perspective "view of a corner` pressed stop or detent to hold the door in closedA the

notches

17 and 18. Due to the difference in the I cabinet ywith the vdoor of the invention mounted therein.

FIG. 6 is a side elevational view ofthe bracket in4 FIG. 5.

FIG. 7 is a fragmentary vertical cross sectional view taken along the plane of the line 7-7 irl FIG. 6.

FIG. 8 is a fragmentary top plan view of the shelf used on the door, the door panels being shown in crosssection.

V FIG. 9 is a fragmentary front elevational view of the door shelf, the door panels being removed.

FIG. l shows the relationship and use of the door of the invention. A corner cabinet 1 adopted for mounting in the corner of a room has an L-Shaped top panel 2 and an L-shaped bottom panel 3 connected by two end panels .4. The end panels may have notches 5 in their forward corners to provide toe space under the cabinet vas is common. The front or inner side of the cabinet thus has two merging openings in two angularly disposed planes that are closed by the angled panels 6 and 7 when the door is closed. One or more segmental arcuate shelves S (two illustrated) connect the door panels and rotate therewith to swing to in front of the cabinet when thedoor is rotated about an upright axis in either direction.

As appears more ,clearly from FIG. 2, the door is mounted in the cabinet by means of an upper mounting plate 9 secured to the underside of the top panel 2 and a lower plate 10 secured to the top of the bottom panel 3.

The plates 9 and 1t) are identical, the top plate 9 being.

inverted. The plates 9-10 have axially outwardly ex. truded bearings 11 projecting intoshallow holes bored therefor in the cabinet panels. The bearings receive pintle pins 12 projecting from identical but reversely. mounted door brackets 13. The brackets 13 have door panel connecting arms 14 extending at right angles to each other and desirably reinforced by ribs 15. TheV arms form angles and one of the door panels 6 is butted into this angle while the `other panel 7 is butted against the inner edge of the first panel. The panels are secured together and to the arms by screws 16 passed through the arms of the brackets. The door panels are square edged as is most convenient to saw them. A neat overlapped joint is produced at the apex of the angled door. One panel 7 is narrower than the panel 6 by an amount equal to the thickness of the panels. Particular attention is directed to to door panels being used is mounted ilush with the corner in the L-shaped top panel 2 and bottom panel3.

When closed, the door panels are flush with these edges. l

The plates 940 further define detent holes or keepers 19 at equal distances from the bearing 11 and alinedwith spacing of the notches, one hole opens to the closer spaced notch as at 20. i

Returning to the pintle brackets 13, it will be noted from FIGS. 5, 6 and 7 that the bracket has a channel shaped body 21 of folded sheet metal with the arms 14 projecting from the side flanges 22 vof the body. The web 23 of the channel is notched at 24 in the planes of the arms to form a firm apex locating the edges of the door panels. Near its rear'end (rearwardly of the door panels) the web is extruded inwardly of the channel to form a collar 25 into which is pressed tted the housing 26 of a springpressed ball detent 27 coopera tive with the keepers 19.

Patented Dec. 8,1964 Y the derail pian f '-FIG. 3 which shows the ends of the plates 9-10 to be Near its center but as close to the notch 24 as clearanceV T he pintle pin projects upwardly between the side flanges 22 and has a collar 3 0 that limits outward projection of the pintle and acts as an abutment for the spring 31. The j upper end of thespring bears against a cover and earn plate 32.

The upper edges of the iianges 22 have a fiat portion 33 with ears 34 projecting thereabove and a locating shoulder 35 at their outer ends. The cover plate 32 has holes 135 that Yreceive the ears 34 which are staked or bent over to hold the plate in place. The cover plate defines a hole passing-and guiding the axially inneren'd of the pintle pin. The pintle pinis thus normally spring pressed axially outwardly for coaction with the bearing 11. f

`A t its inner end the pintle Pin 12 is shouldered as at 36 tov receive the laterally projecting operating lever 37.

the end of thepin. The rear end ofthe cover plate is turned up at an angle to form a pintle pin retracting cam with an inclined cam edge 38 terminating in a flat rest 3Q and stop 40. By rotating the levers 370i two brackets 13 the pintle pins can be retracted into the lrests 39. The door can thenbe inserted in or removed from they cabin et. Reverse action of the levers permits the spring 31 to engage the pintles in the bearingsll.V

The shelves 8 are both supported? by the door panels and assist in holding the panels together. As appears from FIGS. 8 and 9, the shelves have segmental arcuate panels 4 1 of about 270 arcuate shape and 90 notches corresponding to the angle of the door panels6-7. The edges of the sector shaped notch are turned up in attaching anges 42 that are screwed to `rthe door panels at selected levels. A notch 43 provides clearance for arms sof to be described, The periphery of the panel 4l is turned l up in a lreversely turned stifening rim 45. Near its ends the rim 45 is separated fromA the'wall 44 as at 46'and turned upwardly in attaching ears 470i channel section that are'secured by'screws to the rear sides of the door The shelves are supported in their centers by arms 48 of downwardly opening cross sectionf Welded yt panelstlie bottoms ofy the shelves at 49. At their inner yends of the arms 4S are-turned upwardly through the'notches- 43 and the anges of the channelare enlarged into plates 50 that overlap andare welded to the end lian es 42 at 5 1. The plates 50, are also connected to thev door panels o by screws passed through the Vholes 52.. `The shelf isY thus securely supported from the door panels at its ends and center and also assists in holding the door panels together. What is claimed as new is: i' l. In combination with a corner cabinet having L- shaped top and bottom panels',

a door consisting of angularly disposed panelsarranged to close thespace between-the inner arms of said L-shapedpanels, y v mounting plates having notches in their ends secured in ilush relation to the inner sides of saidk L-shaped panels and projecting rearwardly'therefrom,

bearing flanges turned from said plates rearwardly fromY said notches and projecting into said top and bottom panels,

4said plates h avingothernotches at their opposite 'ends' spaced Vd iiferently from said bearing'hanges thanV saidrstnotchesp detent recesses formedin said plates between saidV bearing angesand each of said notches,

mountingbracketsV positioned atthe upper vand lowerV ends of said V,door panels and having channel shaped f bodies facingV inwardly of the cabinet with 'thefwebs ofthe channelsopposed to the inner sides of said Lashapedjpanels, Y Vconnecting armsl turned angularly'outwardly from said` 20, The lever is secured in place by press fitting and staking Ya peripheral wall on said channel shaped bodies yand secured to the rear sides of said door panels, v

- offset bearing seats formed in the Webs of said bodies the inner ends of said pintle pins being journaled in said cover plates vand havinglaterally projecting operating levers secured thereto,

cam flanges with inclined edges on said cover plates positioned in the path of rotation of said operating levers,

spring pressed detents carried by said bodies and cooperative with said' recesses in said mounting plates,

springs compressed between said shoulders on said pintle pins and said cover plates, a segmental circular shelfv of approximately 270v embracing the rear'sides of said door panels and having upturned iang'es on its angular edges secured to said door panels, Y

stiiening rim, the ends ofv said rim being turned upwardly and secured tothe rear sides of said door panels and a shelf supporting bracket having angularly disposedflanges secured to the back side of said door panels above said shelf with an arm projecting down- Wardly and radially outwardly underneath' the center portion'of the shelf to support the shelf. l

2. in combination with a corner cabinet having L-shaped topV and bottom panels,

a door consisting of angularly disposed panels arranged to close the space betweenV the inner larms of said L-shaped-panels,

mounting plates having notches inv their ends secured in lush relation tothe inner sides vof said L-shaped panels and projecting rearwardly therefrom,v bearing flanges turned from said plates Vrearwardly from said notches and projecting into said top and bottom panels, detent recesses; formed in said plates between said bearing flangesand said notches,

mounting brackets positioned at-the upper and' lower ends of said door panels Vand having channelshaped i bodiesfacing inwardly :of the, cabinet withwthe WebsY of the vchannels opposed-to the inner sides of said YL-shaped panels, connecting arms turned angularlyfoutwardly from said channel shaped bodies and secured to the rear sides of said door panels,v f olsetbearing seats formed inthe webs o f said bodies and facedoutwardly ofY saidA cabinet in lappedrrelationwith said plates,

i inwardly turned -bearingiiangeslformed on Vsaid seats,

pintlepins reciprocably mounted in said last bearing fianges and having shoulders engageable therewith,

coverl plates secured'acrossthe side flanges of said channel-'shaped Ybody members,

" the inner ends of said ,l pintle pinsy being journaledin Vsaid{ :over-"plat'e's andV having laterally projecting Operating levers secured thereto,

cam lianges with inclined y,edges on said cover plates positioned Vin the path of rotation of said operating levers,fV

spring `pres seddetents'carried by-'s'aidbodies and cooperative withsaid .recesses in-said mounting plates, springs compressed'between said'fpintlefpinsand said Y cover plates,i afsegmental circular kshelf o f approximately 270 embracing the rear sides of saidf ,door. panels and having shelf having a downturned upturned flanges on its angular edges secured to said door panels,

and a peripheral Wall on said shelf having a downturned stiffening rim,

the ends of said rim being turned upwardly and secured to the rear sides of said door panels.

3. In combination with a corner cabinet having L-shaped top and bottom panels,

a door consisting of angularly disposed panels arranged to close the space between the inner arms of said L-shaped panels,

mounting plates having notches in their ends secured in flush relation to the inner sides of said L-shaped panels and projecting rearwardly therefrom,

bearing openings formed in said plates rearwardly from said notches,

detent recesses formed in said plates between said bearing openings and said notches,

mounting brackets positioned at the upper and lower ends of said door panels and having channel shaped bodies facing inwardly of the cabinet with the webs of the channels opposed to the inner sides of said L-shaped panels,

connecting arms turned angularly outwardly from said channel shaped bodies and secured to the rear sides of said door panels,

inwardly turned bearing anges formed on the webs of said bodies,

pintle pins reciprocably mounted in said last bearing flanges and having shoulders engageable therewith,

cover plates secured across the side flanges of said channel shaped body members,

the inner ends of said pintle pins being journaled in said cover plates and having laterally projecting operating levers secured thereto,

spring pressed detents carried by said bodies and cooperative with said recesses in said mounting plates,

springs compressed between said pintle pins and said cover plates,

a segmental circular shelf of approximately 270 embracing the rear sides of said door panels and having upturned flanges on its angular edges secured to said door panels, Y

and a peripheral wall on said shelf having a downturned stiffening rim.

4. In combination with a corner cabinet having L-shaped top and bottom panels.

bearing flanges turned from said plates rearwardly from said notches and projecting into said top and bottom panels, Y

said plates having other notches at their opposite ends spaced differently from said bearing anges than said first notches,

detent recesses formed in said plates between said bearing anges and each of said notches,

mounting brackets positioned at the upper and lower ends of said door panels and having channel shaped bodies facing inwardly of the cabinet with the Webs of the channels opposed to the inner sides ofrsaid L-shaped panels,

oifset bearing seats on the webs of said bodies and faced outwardly of said cabinet in lapped relation with said plates,

cover plates secured across the side ilanges of said channel shaped body members by means of ears on the channel anges passed through the cover plates and staked against the plates,

spring pressed detent carried by said bodies and cooperative with said recesses in said mounting plates,

and springs compressed between said shoulders on said pintle pins and said cover plates. 5. In combination with a corner cabinet having L- shaped top and bottom panels,

a door consisting of angularly disposed panels arranged to close the space between the inner arms 'of said L-shaped panels,

mounting plates havingV notches in their endsV secured in flush relation to the inner sides of said vL-shaped panels and projecting rearwardly therefrom,

bearing openings formed in said plates rearwardly from said notches,

bearing openings formed in the webs of said bodies, pintle pins reciprocably mounted in said last bearing openings and having shoulders projecting beyond the bearing portions of the pins,

cover plates secured across the side anges of said Y channel shaped body members,

the inner ends of said pintle pins being journaled in said cover 'plates and having laterally projecting operating levers secured thereto,

' cam ilanges with inclined edges on said cover plates and springs compressed between said shoulders on said pintle pins and said cover plates. 6. In combination with a corner cabinet having L- shaped top and bottom panels,

mounting plates having notches in their ends secured in ush relation to the inner sides of said L-shaped panels and projecting rearwardly therefrom,

bearing openings formed in said plates rearwardly connecting arms turned angularly-outwardly from said` channel shaped bodies and secured to the rear sides of said door panels, Y bearing openings formed in the webs of said bodies,

pintle pins reciprocably mounted in said last bearing openings and having shoulders engageaole therewith,

the inner ends of said pintle pins being journaled in` said cover plates, Y

and springs compressed between said shoulders on said pintle pins and said cover plates.

7. Hardware for mountinga corner door in a corner :abinet having L-shaped topV and bottom panels comgrising mounting plates having notches in their ends idapted to be secured in liush relation to the inner sides )f said L-shaped panels and project rearwardly therefrom,

bearing flanges turned from said plates'rearwardly from said notches to projecting into said top and bottom panels,

said plates having other notches at their opposite ends spaced differently from said bearing anges than said first notches, detent recesses formed in said plates vbetween said bearing flanges and each of said notches,

mounting brackets adapted tobe positioned at the upperv and lower ends of angled doorfpanels and having channel shaped bodies to face inwardly of the cabinet .with the webs of the rchannels opposed to the inner sides of said. L-shaped panels, v connecting arms turned angularly outwardly from said channel shaped bodies adaptedA to bev ysecured to the rear sides of said door panels, olset bearing seats on the channels of said bodies and faced outwardly of said bodies to lap against said plates,

inwardly turned bearing llanges formed on said seats,

pintle pins reciprocably, mounted in said last bearing flanges and having shoulders engageable therewith,

cover plates secured across the side flanges of said channel shaped body members by means of ears on the channel flanges passed through the cover platesand staked against the plates,

the inner ends of said pintle pins beingjournaled in said cover plates and having laterally projecting operating levers secured thereto,

cam anges with inclined edges onV said cover plates positioned in the path of rotation of said operating levers, Y

spring pressed detents carried by said bodies andcov v operative with said recesses in said mounting plates,

and springs compressed between said shoulders on said pintle pins and saidcover plates `biasing said pins outwardly offsaidjchannelshaped bodies.

8. Hardware for'mounting a cornerdoor in a corner Labinet having L-shaped top and bottom panels coinrising mounting plates having notches in their ends fdapted tobe secured in flush relation to the inner sides f said L-shaped panels and project rearwardly ythererom,

bearing openings lformed in said from said notches, said plates having other notchesl at plates y rearwardly their opposite ends spaced differently from said bearing openingsV thang.

said channel shaped bodies adapted to vbe Vsecuredl t-o the rear sides of said'door panels, bearing openingsformed onV the webs of said bodies, pintle pins reciprocably mounted insaid last bearing openings and having axially facing stops, cover plates ,secured across the side flanges of said l channel shaped body members,V n thev inner'v endsl of saidVV pintle pins being journaled in `Vcomprising,

said cover plates and having laterally projecting operating levers secured thereto, y cam fianges with inclined edges on said cover plates positioned in the path of rotation of said operating levers, and springs compressed between said pintle pins and said cover plates biasing said pinsl outwardly oi said channel shaped bodies. Y9. Hardware for mounting a corner door in a corner cabinet having L-shaped top and bottom panels comprising mounting plates having notches in their ends adapted to be secured in flush relation to the inner sides of said v L-shaped panels and project rearwardly therefrom,

bearing openings Yformed in said platesrearwardly from said notches,

said plates having other notches at their opposite ends spaced differently rfrom said bearing openings than said first notches.

mounting brackets adapted to be positioned at the upper and lower ends of angled door panels and having channel shaped'bodies to face inwardly of ythe cabinet with the webs of the channels opposed to the inner sides of said L-shaped panels,

. .connecting arms turned angularly outwardly from ,said channel shaped bodies adapted to be secured Y to the rear sides of said door panels,

bearing openings formed on the webs of said bodies, pintle pins reciprocably mountedin said last bearing openings and having axially facing stops,

cover plates secured across the, side anges of said channel shaped body members,

the inner kends of said pintle pins being journaled in said cover plates and having laterally projecting operating levers secured thereto,

cam tianges with inclined edges on said cover plates positioned in the path of rotation of said operating levers,

and springs compressedV between said pintle pins and said cover plates biasing said pins outwardly of said channel shaped bodies.

l0. A mounting bracket for an angled corner door comprising, l n

a channel shaped body havingl a web wall with an angled notch in one end and side flanges, arms extending at Ian angle from one end of said side t anges and' attachable to angularly disposed panels a plate forming a cover wall bridging said side lianges in spaced relation tothe Vinner ends of said arms rand secured to said flanges by ears on the flanges passed through holes provided therefor in the plate and staked over the plate, Y f said walls defining lalined pintle pin holes with bearing flanges extruded ltherefrom inwardly of said a thrust seat oE-set fromithe web wall of said body around the pintle hole therein, i .a pintlepin reciprocably mounted in said pintle holes land projectable'beyond said thrust seat, 1 shoulder vmeans on said pin engageable withione of said walls to limit outward protection of said pin, an operating lever projecting. from said Vpin inwardly rot the Vprojectable end thereof, a lspring positioned between saidY walls and biasing said pin outwardly, l and a stop Ion said cover Wall cammingly engageable withv saidV operating lever.y toV retract and pin; in retracted position. Y

l1.. A mounting bracket Vfor an angled corner door a channelV shaped body; having a web; wall and side Y llanges, f

-arms extending at an angle from one endof'said side Y. flangesand attachable to angularlyY disposedrpanels of a door,Y

hold said comprising,

a plate forming 'a cover wall bridging said side flanges in spaced relation to the inner ends of said Iarms, said walls delining alined pintle pin holes with bearing anges therearound,

a thrust seat ol-set from one of said Walls around the pintle hole therein, Y Y

a pintle pin reciprocably mounted in said pintle holes and projectable beyond said thrust seat,

means on said pin to limit outward protection of said an operating lever projecting from said pin inwardly of the projectable end thereof,

and a stop on said body engageable with said operating lever to hold said pin in retracted position.

12. A mounting bracket for ari-angled corner door a channel shaped body having a web wall and side flanges,

arms extending at an angle from one end of said` side anges and attachable to angularly disposed panels of a door,

a plate forming a cover wall bridging said side anges in spaced relation to the inner ends of said arms,

said walls dening alined pintle pin holes,

a pintle pin reciprooably mounted in said pintle holes and projectable beyond said walls,

means on said pin to limit outward protection of said -an operating lever projecting from said pin inwardly of the projectable end thereof,

and `a stop on said body engageable with said operating lever to hold said pin in retracted position.

13. In a mounting for an angled corner door,

said plate defining a bearing opening alined between said notches and closer to one notch than the other,

said plate further deining detent keeper stops at diametrically opposed points equally spaced on opposite lsides of said bearing opening,

a door bracket having a body attachable to an angled door in projecting rel-ation from the apex of the door and having a wall arranged to lie in opposed relation to said plate,

a pintle pin mounted in said body and projectingfrom said wall to coact with said bearing opening,

and a spring pressed detent mounted in said wall and projecting yieldably therefrom at the same distance therefrom as the spacing between said bearing opening and said keeper stops on said plate to coact with said stops.

References Cited in the tile of this patent UNITED STATES PATENTS y Great Britain May 2, 1948'

Claims

6. IN COMBINATION WITH A CORNER CABINET HAVING LSHAPED TOP AND BOTTOM PANELS, A DOOR CONSISTING OF ANGULARLY DISPOSED PANELS ARRANGED TO CLOSE THE SPACE BETWEEN THE INNER ARMS OF SAID L-SHAPED PANELS, MOUNTING PLATES HAVING NOTCHES IN THEIR ENDS SECURED IN FLUSH RELATION TO THE INNER SIDES OF SAID L-SHAPED PANELS AND PROJECTING REARWARDLY THEREFROM, BEARING OPENINGS FORMED IN SAID PLATED REARWARDLY FROM SAID NOTCHES AND PROJECTING INTO SAID TOP AND BOTTOM PANELS, MOUNTING BRACKETS POSITIONED AT THE UPPER AND LOWER ENDS OF SAID DOOR PANELS AND HAVING CHANNEL SHAPED BODIES FACING INWARDLY OF THE CABINET WITH THE WEBS OF THE CHANNELS OPPOSED TO THE INNER SIDES OF SAID L-SHAPED PANELS, CONNECTING ARMS TURNED ANGULARLY OUTWARDLY FROM SAID CHANNEL SHAPED BODIES AND SECURED TO THE REAR SIDES OF SAID DOOR PANELS, BEARING OPENINGS FORMED IN THE WEBS OF SAID BODIES, PINTLE PINS RECIPROCABLY MOUNTED IN SAID LAST BEARING OPENINGS AND HAVING SHOULDERS ENGAGEABLE THEREWITH, COVER PLATES SECURED ACROSS THE SIDE FLANGES OF SAID CHANNEL SHAPED BODY MEMBERS, THE INNER ENDS OF SAID PINTLE PINS BEING JOURNALED IN SAID COVER PLATES, AND SPRINGS COMPRESSED BETWEEN SAID SHOULDERS ON SAID PINTLE PINS AND SAID COVER PLATES,
12. A MOUNTING BRACKET FOR AN ANGLED CORNER DOOR COMPRISING, A CHANNEL SHAPED BODY HAVING A WEB WALL AND SIDE FLANGES, ARMS EXTENDING AT AN ANGLE FROM ONE END OF SAID SIDE FLANGES AND ATTACHABLE TO ANGULARLY DISPOSED PANELS OF A DOOR, A PLATE FORMING A COVER WALL BRIDGING SAID SIDE FLANGES IN SPACED RELATION TO THE INNER ENDS OF SAID ARMS, SAID WALLS DEFINING ALINED PINTLE PIN HOLES, A PINTLE PIN RECIPROCABLY MOUNTED IN SAID PINTLE HOLES AND PROJECTABLE BEYOND SAID WALLS, MEANS ON SAID PIN TO LIMIT OUTWARD PROTECTION OF SAID PIN, AN OPERATING LEVER PROJECTING FROM SAID PIN INWARDLY OF THE PROJECTABLE END THEREOF, AND A STOP ON SAID BODY ENGAGEABLE WITH SAID OPERATING LEVER TO HOLD SAID PIN IN RETRACTED POSITION.