US1415104A - Combined door lock and latch - Google Patents

Description

F. MEYER.

COMBINED DOOR LOCK AND LATCH.

APPLICATION FILED MAY I5. 1920- 1,415,104.. I Patented May 9,1922.

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FEEDER/TCE MEYER, OIF BUFFALO, NW YORK.

oor/reinen noosJ Look .ann LATCH...

' i Application fnac. Mayta To all whom t may concern Be it known that l, FREDERICK MEYER, a citizen of the United States, residing in Buf falo, in the county of Erie and State of New York, have inventedy new and useful Tinprovements in Combined Door Locks and Latches, of which the following is a specilication. Y

This invention relates to a'combined lock and latch for swinging doors and more particularly for the doors used in railway refri erator cars.

ne of the objects of the invention is to pro-vide a combined lock andvlatch by means of which the door to which it is attached may be hermetically closed so as to prevent all leakage of air through the joints around the door. A further object of the invention is to provide a strong and durable locking latch which may be unlatched from either the outside or the inside of the door, so that a person cannot be imprisonedV by an accidental v latching of the door. A still further object of the invention is to provide a locking latch which'niay be easily applied to a door either where said door has already been in use or where the sainer is new and unused. Further objects and advantages will appear more clearly from the following description and accompanying drawings wherein:

Figure l is a horizontal longitudinal section of apart of a door and wall showing the locking-latch applied thereto in plan view and in its locked position. .Figure 2 is a horizontal longitudinal section through the locking latch withthe same in its latched but unlocked position. Figure 8 is also a similar horizontal longitudinal section but in both the unlatched and unlocked position. Similar characters of reference referto like parts throughout the several views.

This improved locking latch may be applied toany swinging door but it is more particularly adapted for use with the door of a railway refrigerator Garland will be hereafter so described and treated though of course the same may be otherwise utilized. The vertical outer wall 10 of the refrigerator' carv is provided with the usual doorwayv 11 and with the swinging or hinged door l2 which. is adapted to engage the adjacent j ambportion of the wall or door frame and is suitablymounted on hinges (not shown) or is otherwise pivoted at one end (the left hand end as it is vshown in the accompanying drawings) so as to be able to swing out- Specirication of Letters Patent.

rammed May e, 1922. 1920.V sei-iai No. 581,623.

wardly in an are in the direct by the arrow shown in Fig'. 3.

its inward swinging movement is, of course, limited by striking against the outside face of the wall. For refrigerator work or for other purposes where it is highly desirableto hermetically close the door, and this desired result is most easily secured by merely causing the door to be jammed or closed tightly under the influence of a veryk heavy pressure. Such a heavy jammin pressure on the closed door is accomplished as follows:

Arranged on the wall adjacent to the edge of the door opening is a base 14, which is provided at its front edge with an outwardly projecting standard 13 and with apair of lateral 'base Hanges or ears 15, which ears are secured to the wall by means of screws 16 and 160. Pivoted by Va pin 17 t0 the outer end of the said standard 13 is a pressure bar orwedging lever 18 whose inner thickened end is bifurcated at 2O and embraces opposite sides of lSaid standard 1S in a very substantial andstrong manner. VcSecured by screws 21 or otherwise to the door and adjacent to the' said standard 13, is a long heavy thrust plate 22 which is preferably Vprovided onv its inner end with a pair. of thrust faces 23 which are preferably inclined as shown. The wedging lever 18 `is provided adjacent to its pivot 17, with a pair-of cam faces 24, which are adapted to come into contact with said thrust faces 28 as tl e lever is turned into the position shown in 1. This action ofthe cam faces 2e of the wedging lever causes the doorto be closed or pressed backwardly very forcibly against the wall, thereby assuring a tight, hermetic joint between said door and the wall. .The frictional resistance between the said cam faces 2li and the thrust faces aids in preventing any alteration in the respective positions of the parts.v The outer or thin-end f the wedging lever 1S is provided with a longitudinal slot 26v which extends through the lever from one face thereof to the other and is adapted to receive very loosely within its interior, a staple eye or locking post 27 whose legs are suitablysecured to the outer end of thethrust plate 22. To lock the refrigerator door when said wedging lever has been closed, a padlock 28 is passed through the outer end of the said staple eye on the outside ofthe said kwedging lever 18. The same result may be obtained however, by any7 other suitable means as for instance passing` ion indicated f a strip of metal through the said staple eye and securing its ends by means o t' aV compressed lead button asis common practice Vin railway work. It should be noted that the door is not necessarily held Vor retained'in its tight position by either the padlock 28 or by 'theffrlctionalresistance 0,1. the cam faces 24;

against they thrust facesv 23. rlylie wedging lever principally retains its position oi? its Sover 1;1avelv past, the dead, Center pesi tion'. That is, whemthbe outerthin endl ot the wedginglever 18 strikes theouter face oi the thrust platei'22, a linewhic'h is perpen-v the geometric relationship ot Fig. 1) that the lever will be held iirmly in place merelyby reason ot the i'irictional resistance ot'the abutting aces ot the parts. 'It is obvious too that the closed door is onlysubject to vibration whefnthe'car is actually in' motion and A,it

only underl such conditions; lthat the" accivdental. openingfo't the ydoor by vreason of vibration needfbe considered, 'lt is'readil'y undersOdtliat Vwhen thecar is actually in'ni'otion the 'door is 4positively preventedtroin n accidentally opening by reason ot thepadloclr 28 aforesaid,A because the purpose eta' car loclrf is to keep the same locked while in transit.

The invention also provides :for the latching ofthe door which ot course is aV very use ful adjunct oil? refrigerator doors inasmuch as such doors must be kept closed atall times except only when' actually being loaded ory unloaded. The latching 4 arrangement sho wn inthe drawings is as Yfollows:

i ltzrtending inwardly 'from the inner side oit the iront part ot the standard l"i'lis a pair ot'pivot ears 3() which receive opposite ends of a vcatch pivot pin 31. livoted at` its lower end on said catch pivot pin' is a catch 32 Yliich`- is suitably received within the hollow lower interior 'of said standard, The `upper 'forward part ot the catch is provided with a latching tongue or engaging )ron whose uaoer edge yis Ata aered or t beveled inwardly and 'forwardly and whose lower vedge projects straight out laterally. The rearend o'tvthe catch narrows down to torni along curvedtail piece 34; which eX- tendsrearwardly and somewhat upwardly and whoseouter tipis adapted to be pressed inwardly by the wedgingvlever 18' in such manner as to unlatch the catch when said wedging` leverisl turned b'aclrtrom the positionshown in Fig. 1 to that shown in Fig.

3. Thalatching tongue 33er" Vthe catch possibly move; or

is adapted to co-operate with an abutment 35 which is .combined in Vone integral piece or' metal with theV :riore-described thrust plate 227 the aforementioned thrust faces 23 being ,formed-Ton epposite longtiudinal edges of said abutment 35. The outer face of said.- abutment is longitudinally straightrand' VJdat and isA adapted to hook under or engage with the'iatuiider tace oty the aforesaid llatching tongue 33 as shownin Fig. 2. The

inner or rear cornerl ofthe abutment etais however rou'ndetcl` or beveled somewhat so that, as, the door is closed and theabutment.

bonies in Contact with the,.beveled upper corner of` the flatchingtongueY33, said abutinent lcauses the catch'to 'be Iuilatched ory thrown rearwardly into the position shown in Fig. 3 ,in a manner common toordinary latches. Thevlatehing: of theV catch is theretore automatic in` its action, whereas? the u'nlatching thereojl" is accomplished bymanu ally moving lthe wedging lever 18 rearwardly v. .y Y i rllolthe rear part ot the catch is pivoted a curved draw l'inlrwhose outer end 1s b1 Athroated and whose inner curved end extends inivardly andis guided in the standard ina.`

s iiitable recessed bleariijigv lO. The counter sink or annular recess il on the/outer side rot vsaid bearing 40 is arranged to receive Vthe lower `Lend ot a compression catch lspring 42 which jencircles the curved y draw, linlr? and bears with itsV opposite ends againstthe 'upper bifurcated end of, said draw4 linlri andV against theV bottom ol the aforesaid y recess troni the position ot' Fig. 2 lto tlrantof' Figfpv llir'espectively. `VThuspthe spring tendsto alnijays move'the catch torwardl'yi-rito the` Vlatcliingpositionshown 1n F ig. 2. j v

To prevent a workman 'from becoming accidentally imprisoned 'or2 latched inytheretrigerator car,"a fsai'ety or emergency device is'iprovided wherebyffthe catch 32 may bev inflatchetlrroin the .inside oifth'e carl This safety-device consists a cliain Zlfonotherl' l flexible .einergen'cy-` connection, whichv is fastened at its outer lend Vto 'the atoresafiddraw linkI 37 and isffastened at its inner end Ito a` sealingdisk -orfwasher Zllwhich is preterably provided with a ringfl oifotliersuitable means for manually seizing the ,saiddislg. The flexible einer@ ncycOnnection or chain 48 isot lsuch chai @ter as tobefreadf,

ily` alteredfin length to .suit the y*partic'ular' thickness ithe kwallof lthe refrigerator car in: which the combined lock and latch i employed astoftheilexible connectionfl the. required number 4ot luilrs are .in ere and the outermost linlr'snitable bentfon or fastened tolr'thelouter side the' disk o 41e, while the sa id flexible connection which' is 1 Y being `employedis conVst-,rucfted'of` any other br/ins installed. ln the caseY where a chain isbeing ias tleribleyrnaterial, is likewise inerelyfcut to proper y length andV suitably fastened' to thef Y outer "taceV of fsaid disli. The lsaid'ernergency connection 43 or chain passes through the refrigerator Wall and through thevbore of a metal tube which is cut to the desired length and swedged or driven into place, so that the chain is enabled to pass through the refrigerator Wall freely and Without friction and Without liability of becoming tangled up Furthermore as the Walls of refrigerator cars are frequently filled with loose insulating material such as saw dust the use of this chain tube 39 p events the said insulating material from leaking out of the hollow part of the Wall and clogging up the said chain i3 and its appurtenances. The sealing disk le serves to hermetieally seal the chain tube 39 When the catch is in its outer or normal, latched position so that any flow of air and, therefore any consequent transfer of heat by a leakage is prevented eX- cept only when the catch 32 is momentarily unlatched or thrown back Whenever' it is desired to unlatch the door.

In other Words, the normal position of the catch and its emergency chain are, shown in Figs. l and 2, and in this position the chain or'the sealing disk is of course prevented from becoming accidentally retained in its drawn out position. Ordinarily, hovvever, in practice the movement of the draw link SZ'is taken up by the contraction of the links of the chain or by the contraction of any other flexible connection Which may be employed, Without disturbing in anyv Way the sealing disk 44C lor the ring which is attached to the inner side thereof.

lt Will thus be seenthat the invention not only permits of tightly jamming the door closed and locking the same in this tightly closed position but also servesl as an easily operable latch for temporarily latching the door in its closed'position. The imprisoning of a Workman in the refrigerator car by reason of the accidental lat-ching of the door while he is inside the car, is entirely prevented by the safety or emergency device Which is operated by the ring d5. The Ymetal chain tube 39 enables this emergency device to be employed in a refrigerator wall of any thickness and of any sort of internal structure. The nature of the chain or flexible connection i3 is such that it Would not ordinarily disturb the position of the sealing disk le and certainly very slightly, if at all, so that there isno danger of derangement and furthermore the length of the emergency connection is readily adjusted in lengthso that the same may be applied to av refrigerator wall of thickness. lt should be noticed too that the Whole invention is lacking in delicate fragile parts and is thereby rendered suitablo for the heavy duties which are necessarily imposed upon it in refrigerator car Work. Furthermore the unlatching and the jamming tight of thedoor involve the action of a straight line force, so that the human hand is not necesand reliable in its operation and can he produced at a lovfmanufacturing cost.

l claim as my invention l. A combined door lock and latch com# prising a catch, a vfedging lever provided with a cam face which is adapted, in one position, to tightly jamb the door closed and in another position to operate the said catch.

2. A combined door lockand latch com prising a catch, a thrust plate secured to the door, a vvedging lever provided with a cam face Which is adapted to be tightly jammed against said thrust plate, said lever being also adapted to unlatch the aforesaid catch.

3. A combined door lock and latch comprising a wedging lever provided with a cam face, .a catch provided with a latching tongue and adapted to be unlatched by said Wedging lever, a thrust plate adapted to receive the thrust of the cam face of said Wedging lever, and an abutment adapted to engage With the latching tongue of said catch so as to latch the door.

4. A combined door lock and latch comprising a thrust plate and a dete'nt plate adapted to be secured to a door, a standard adapted to be secured to a Wall, a Wedging lever pivoted to said standard and provided With a cam face Which is adapted to be tightly jammed against said thrust plate7 and a catch also pivoted to' said standard and adapted to be actuated by said Wedging lever and provided With a latching tongue Which is adapted to engage With the aforesaid abutment.

5. A. combined door lock ,and latch comprising an abutment and a thrust platel adapted to be secured to a door, a standard adapted to be secured to a Wall, a catch pivoted to said standard and provided with a draw link, an emergency connection secured at one end to said draw link and passing through the Wall to the inside thereof, and a Wedging lever also pivoted to said standard and provided With a cam face which is adapted to be jammed forcibly against said thrust plate.

6. A combined door lock and latch vcoinprising a thrust plate and an abutment coinbined in one integral piece and adapted to be securedto a door, a standard adapted toV be secured to a Wall, a catch pivoted to said standard and provided with a latching .,ongue, and a Wedging lever also pivoted to said standard and adapted in one of its positions, to jam very heavily against said thrust plate and adapted, in its other position to operate said catch.

be secured to a wall. a Cach 'voted to said standard and p'ovided with latchng tongue, a; Wedgnghlevey provided 'with a- 'cam face amd havmg two poeltons, m one of" heavily against ehe thrust plaie and in the other pesltlomsmd wedgmg ever 1s adapted to unasch the-'aforesaid catch, and mean;V

for making said lever in its jamming posl.- tion.

FREDEMCK /IEYER.

'hch the cam face is adapted to jam very

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