US1492088A

US1492088A - Door latch

Info

Publication number: US1492088A
Application number: US140683A
Authority: US
Inventors: Herbert G Schmitz
Original assignee: Individual
Current assignee: Individual
Priority date: 1917-01-05
Filing date: 1917-01-05
Publication date: 1924-04-29
Anticipated expiration: 1941-04-29

Description

April 29 1924. 1,492,088

H. G. SCHMITZ DOOR LATCH Original Filed Jan. 5. 191? ikmcwecw, M o

"fit Patented Apr. 29, 1924.

HERBERT G. SCHMITZ, OF CHICAGO, ILLINOIS.

T NT

DOOR LATCH.

Application filed January 5, 1917, Serial No. 140,683. Renewed February 7, 1923.

To all whom it may concern:

Be it known that I, HERBERT G. SCHMITZ, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Door Latches, of which the following is a specification.

My invention relates to improvements in door looks or catches, and is particularly suitable for use in connection with vehicles,

for instance, automobiles.

The object of the invention is to provide a simple, inexpensive, practical, and eflicient lock or catch construction so organized that 16 it may be readily applied to ordinary doors, may be easily manipulated, both in opening and in closing the door, a construction such that the effects of wear will not impair its efliciency or cause rattle or shake, either of the catch or ofthe door itself, and, in general, to provide an improved door catch or look of the character referred to.

In the drawings, which illustrate one application of my invention as applied to the door and body of an automobile,-

Fig. 1 is a broken-out elevation of a portion of the-automobile body and the door, locking from the interior of the car;

Fig. 2 is an enlarged view of a portion of Fig. 1, showing the catch retracted,

Fig. 3 is a section looking along the line 33 of Fig. 2;

F ig. 4 is a broken-out elevation of a modified form of lock or catch, showing the parts in locked position; I

Fig. 5 is a view similar to Fig. 4, but showing the parts in disengaged position;

I and Fig. 6 is an enlarged fragmentary view of a portion of Fig. 4. I

In the drawings, 10 represents the body or casing part of an automobile, and 11 is the usual door mounted to swing upon the hinges 12 and 13. In the casing 10 of the body I provide an L-shaped slot or aperture 14 of sutficient lateral width to slidably accommodate a bolt or look bar 15 mounted in the door 11.

The lock bar 15 slides in a long aperture or slot 16 formed in the door 11, the open end of said aperture 16 registering with the openv end of the slot 14 when the door is closed. In the inner end of the opening 16 I insert a compression coil spring 17 which 55 engages a washer or plate 18 at the end of the lock bar 15, and this tends to force the lock bar 15 outwardly and into the L'-shaped slot 14. In the door and beneath the aperture 16 is a pair ofaxially vertical cylindrical bores into which are fitted a pair of cylindrical open-ended thimbles 19 containing plungers 20 and coil compression springs 21, the plungers 20 each having a reduced stem 22 guided by and passing through the bottom closed end of each of the thimbles 19.

Above the lock bar 15 and in the door there is'formed an aperture or opening 23 containing an operating lever 24 pivoted upon a horizontal shaft or pin 25 secured in the door. Upon the lower end of said lever 24 I mount a pivoted roller 26 which is arranged to engage and depress the'lock bar;

15, overcoming the springs 21 whenever the lever 24 is oscillated.

When the lever 24 is in the position shown in Fig. 1, the spring 17 is free to push theslide bar 15 into the aperture 14 in the door casing, and the springs 19 at the same time force the lock bar upwardly so that the up wardly projecting end27 of-the lock bar engages'in the upper pocket 28 of the L- shaped slot 14, thereby locking the door and at the same time preventing the lock bar and door from moving or rattling. When in locked position, the projection 29 on the in nor end of the lock bar 15 engages in the notch- 30 and effectually prevents any rattling or other movement of the lock bar.

Referring to Fig. 3, it will be seen that the upper end of the operating lever 24 has an inward crank or ofl'set which projectsthrough the facing plate or escutcheon 31 screwed or otherwise secured to the inner face of the door 11, said escutcheon 31 having an arcuate slot 32 to permit oscillatory movements of the lever 24. The inner end of the offset portion is furnished with a ball 33, or other suitable finger piece, for operating lever24, and between the escutcheon 31 and 'thesaid ball piece 33 the crank has with a small notch or opening 35 in the escut'cheon 31 when the operating lever 24 is in the position shown in Figs. 2 and 3, i. e., in unlocked position;

To unlock the door,.the lever 24 is moved from the position shown in Fig. 1 to the position shown in Fig. 2. 'During the first portion of said movement, the roller 26 will engage and depress the lock bar 15, there a small tit or projection 34 which registers by withdrawing the projection 27 from the pocket 28, after which the roller 26 will engage an upstanding lug or projection 36. on the upper side of the lock bar" which will result in the latter beingmoved rearwardly against the influence of thespring 17 When the lever 24 has been moved into the position shown in Fig. 2, the lockybar has been withdrawn Completely from the L-shaped'slot'14 in the casing and occupies the position shown in Fig. 2, in which position the door can be readily swung open; on its hinges. Also, when the lever is in such unlocked position, the tit 34 enfor the reason that whenthe door is slammed shut, the tit or pro-jection'34 is, bythe inertia of the moving parts, shaken or moved out of engagement with the locking notcl'i 35 in the escutcheon, the spring 17 thereupon 'moves the locking bar l5 outwardly into position, and the springs '2 l 'force it upwardly into locked positlon'.

In Figs. 4a1'1d 5 I-have illustrated another application ofiny invention which in some respects is superior to the one previously described. In" this modification, I employ a diamond-shaped catch or looking dog37 which is pivotally mounted in the upper pocket 38 of the casing slot upon "a transverse pin 39. With this construction, the

onset 40 at the end of the locking baris" undercut, as shown at 41, in'order to prop; erly cooperate with 'the diamond-shaped dog 37. It will be understood that in'order to permit the depression of thelock bar by means of the lever 24, it will be necessary to scoop out or scallop the inner face of the diamond-shaped dog,'as shown at 42; The arrangement and dimensions of the parts just described are such that when the' lock bar 15 is inlocked position, thelower"point 43 of the diamond-shaped dog 37 engages in the corner 44 at the end 'of' the 'lock bar 15. In suchposition also the oblique lug 29' on the upper side of the lock bar 15 engages in the oblique notch 30 and in conjunction with the said springs andthe diamond-shaped dog 37, efie'ctually locks the parts in fixed position, even though the door has been in use for a long time and the various rubbing surfaces havebeen'subjected to considerable wear.

Fig. 5 shows the position of the parts opening of the door.

in the modified arrangement when the locking bar 15 has been withdrawn prior to the Referring to said figure, it will be seen that the diamondshaped dog 37 hasbeen rotated by' the point of the look bar and occupies the position shown, witli'its point 43 resting against thelower edge of the pocket 38. It is understood that the dog 37 is maintained by gravity in said position, its upper end being considerably heavier than the point 43, so that when the locking bar 15 is withdrawn, there will be no tendency for the dog 37 to swing into locked position and so prevent the insertion of the locking bar.

It will be understood that the details of construction are capable of considerable modification without sacrifice of eificiency; hence, the scope of my "invention 'must be determined by referring to the appended claims.

I claim 7 r I 1. The combination of a door casingand door provided with an L-shaped aperture and a longitudinally movable bolt'having an L-shaped end adaptedto enter said aper ture and interlock'therewith upon the trans;

verse move'mentof said bolt subsequent to its entering said aperture for fastening the door in closed position in the casing, spring means for automatically pressing saidlbolt longitudinally into said. aperture {and trans"- versely moving said "bolt whereby inter locking engagement of said L-shaped part with "said t shaped aperture is effeeted,a manually operablelever'mounted adjacent said bolt for eifecting transverse and, longi tudinal movements said bolt, "and" a pivoted dog mounted: on said casing and] (go-operating with the end ofsaid bolt.

2. The c'oinbinatiojnfwith a door and its casing, of a bolt longitudinally "movable to fasten the door in closed position in'the, casing, a spring for pressing the bolt longi tudin'all'y, resilient means for pressing the bolt transversely to hold it "in lo'ckedpo'si} tion, and a manually operating lever extending laterallyfrom' the bolt in the direc tion of its transverse movement and operable to first "press the fboltftran'sversely against said resilient means and then move 3 it longitudinally against thespring. 3.'Th e "combination with a door and its casing, each having latching notches, of a longitudinally movable bolt having projec-v tions' to; engage the notches by a lateral movement of the bolt, a spring for pressing the bolt longitudinally, resilient means. for pressing the bolt transversely to hold'it in the locking notches, anda manually-operated lever for first pressing the bolt: laterally to disengage the projections thereof from the notchesg and then moving it longi tudinally against the spring."

V 4.' The combination witha door and its casing, of a bolt movable longitudinally to interlock the door and easing, separate means for pressing the bolt longitudinally and transversely to hold it in looking position, a slotted guide-plate having a notch at one end and a manually operating lever for engaging the bolt to move it first transversely and then longitudinally in the unlocking direction, and having a projection engageable in the notch in the guide-plate for holding the bolt in the unlocked position.

5. A door latch comprising a longitudinally and transversely movable bolt, resilient means for pressing it into locking position, a fixed pivoting pin, a guide-plate with a notch at one end and an operating lever mounted on the pivoting pin for controlling the movement of the bolt in both directions and having one end which extends through the guide-plate with a projection for engaging the notch thereof, the lever being axially movable on the pivoting pin to disengage the projection thereof from the notch of the locking plate.

6. The combination With a door and its casing of a bolt movable to fasten the door in the closed position in the casing, a spring for moving the bolt longitudinally to the fastening position, an operating lever for retracting the bolt against the tension of the spring, said operating lever being provided with a latch for holding the lever in position to maintain the bolt in the retracted position, said latch being automatically released by closing the door and manually released by manipulating the lever.

7. The combination with a door and its casing of a longitudinallymovable bolt, a socket adapted to receive the end of the bolt for fastening the door in the closed position in the casing, means to impart a lateral movement to the end of the bolt when in serted in the socketand a pivoted member operated by the lateral movement of the end of the bolt to apply pressure to said end of the bolt to hold the bolt at a tension in the fastening position.

HERBERT e. SCHMITZ.