US1243596A - Door-latch. - Google Patents

Description

G. H. ELWELL.

DOOR LATCH. APPLICATION FILED SEPT-27. 1915.

Patented Oct, 16,1917.

WITNESSES:

1N VENTOR.

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GEORGE HENRY ELwELL, or :sosroiv, MASSACHUSETTS.

DOOR-LATCH.

Specification of Letters Patent.

Patented Oct. 16, 1917..

Application filed September 27, 1915. Serial No. 52,870.

To all whom it may concern:

Be it known that I, GEORGE HENRY ELWELL, of Boston, in the county of Suffolk, Gommonwealth of Massachusetts, and United States of America, have invented an Improvement in Door-Latches, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

My invention relates toimprovements in door latches and more particularly to that class of latches employing a bolt wlth a hook-shaped head for interlocking engagement with the striker-plate.

The object of my invention is to provide a latch bolt fully adapted to the elasticity of motor car bodies and like uses.

With this and other objects in view, as will more fully hereinafter appear, the in ,vention consists in certain novel features of constructlon and arrangement of parts hereinafter described, illustrated in the ac accompanying drawing and particularly pointed out wherein patentable novelty is claimed for certain features of the device, it being understood that within the scope of what hereinafter thus is claimed various changes in form, proportion, size and minor details of the construction may be made without departing from the spirit or modifying anyof the advantages of the invention.

The following is a description of an embodiment of my invention, reference being had to the accompanying drawings:

1n the accompanying drawings, Figure 1 is an upright view of the mechanism of the device.

Fig. 2 is a top View of the device.

Fig. 3 is a detailcross section view f incasement, lever and bolt, at dotted line aa in Fig. 2. I a

Fig. 4: is a detail cross section view of incasement and bolt at dotted line 6-4) in Fig. 2;

Fig. 5 is a detail in dotted lines showing bolt sections in super position with slightly 1 with aback 4 having a perforation 5, said" face 2 and back withtheir perforations 3 and 5 pro iding guiding bearings for a sliding bolt 6, as shown in Figs. 1 and 2. The bolt 6 is provided with a beveled head 7 for engaging a striker-plate 33 and is also provided with a laterally movable section 8 pivoted at 81 and having a hook 9 provided with a beveled face and normally maintained in a projected position by means of a spring 10 mounted on an assembling pin 32, as shown in Fig. 2. The incasement 1 is also provided with two movable conveyers 1S and 20. Conveyer 18 is yieldingly maintained in its normal rearward position, a shown, by means of springs 19, so as to travel in the space under said bolt 6 when in engagement with and pushed forward by arms 28 secured to bolt 6 as shown in Fig.1. Gonveyer is maintained in its normal forward position by means of a spring 22 so as to travel in the space 17 under said bolt 6 when in engagement with and pushed rearwardly by bolt 6. It has a projection 36 lying between arms 11 of said bolt 6 adapted to be engaged by the rear of member 8. The incasement 1 is provided with a slot 21 regulating the travel of the parts connected to. pin 35, which as sembles said spring 22 with said conveyer 20 as shown in Fig. 1. A lever 12 is provided with a bent attaching end 13 attached to incasement 1- by means of a rivet 1-1 as shown in Fig. 1 permittin the operation of said lever 12 in space 16 under said bolt 6 as shown in Fig. 2. Said lever 12 is nor mally maintained in. an upright position by means of an arm of spring-pressed conveyer 20 and check 23 with which said incasement 1 is provided as shown in Fig. 1. The lever 12 is provided with a transverse recess 27 for travel of bolt 6, and said recess 27 is -mentwith a shoulder 30 with which bolt 6 is provided when" the, lever 12 is slightly tilted as shown in Fig. 5.

In operation when the latch is in an interlocking engagementwith the striker-plate.

33 any strain tending to separatethe strikerplate from the latch incasement extends the projection of said bolt head according to said strain and the arms 28 of bolt 6 advance the conveyer 18 against the exertion of. the springs 19, said conveyer returning to its normal rearward position under the action of springs 19 when tension on bolt 6 is relaxed. In the extended advance movement of said bolt headbolt 6 travels freely over lever 12 and conveyer 20 without operating them. lVhen the bolt head isrretired by means of engagement of its beveled face with the striker-plate, the retiring movement of said bolt travels freely over the conveyer 18 and lever 12 without engaging or operating them. When the bolt head is retired by means of lever 12, theshoulder 26 in its downward movement operates the hook section 8, as aforesaid and theshoulder 29 of lever 12 engaging the shoulder 30 of bolt 6 forces the bolt 6 backwardly. The bolt 6 is thus operated by a lever in the usual way but when in holding engagement with the striker-plate is hooked thereto by the hook 9 whose nose projects over an inner surface on the striker-plate, and is drawn forward by any separation due to rocking of the frame of the car, returning to normal position when the door and its jamb return to normal position. The rigid end of the body of the bolt'6 projects beyond the inner surface of the nose of the hook so as to engage the side of the opening in the striker-plate, and preferably extends so as to terminate in substantially the same transverse plane as the end of the hook.

As will be evident to those skilled inthe art, my invention permits of various modifications without departing from the spirit thereof or the scope of the appended claims.

l'Vhat I claim is:

1. A door-holding means comprising a striker-plate and a latch mechanism having a bolt provided with a hook normally yieldingly held in an intermediate longitudinal position, from which it can be moved in either direction, and in a laterally projecting positionwith its noseextending over a rearward face on said striker-plate, and manual means for retracting said hook laterally and said bolt longitudinally from said striker-plate,

2A door-holding means comprising a striker-plate and a latch mechanism having a bolt provided with a rigid forward end,

and a laterally movable hook normally yieldingly ield in an intermediate longitudinal position, fromwhich it can be moved in either direction, and in a laterally pro- 1 ecting position with its nose [extending over a rearward facexon said striker-plate,

:said rigid forward end extending-beyond the inner surface of said hookandma-nual tractingsaid hook laterally and said bolt longitudinally from i said strikenplate.

aLVA door-holdingmeans comprising a striker-plate and a latch mechanism having a bolt provided with a hook normally yieldingly held in an intermediatelongitudinal position, frorn which-it can be moved in either: direction, and'in a laterally projecting position with its nose extending over'a rearward face on said striker-plate and manual means for retracting said hook laterally and said bolt longitudinally from said striker-plate, said bolt being provided with a beveled end surface adapted to engage and be retracted by saidst-riker-plate as a door bearing said lockis swung to closed position.

5. The combination of a supporting plate, a bolt mounted thereon and consisting of amovable member having a guided body portion and a hook member movably connected to said movable 'member and normally in laterally projected position, spring means permitting said movable member to be moved in either forward or rearward direction 'froma normal intermediate position and adapted to return it to said intermed1ateposit1o-n, and a striker-plate with the *innersu'rface of which said hook is adapted to engage, and manual means for retracting saidhook laterally and saidbolt longitudinally.

6. The combination of a supporting plate, a bolt mounted thereon and consisting of a movable member having a guided body portion and ahook member movably' connected to said movable member and normally in laterally projected position.- spring means permitting said movable member to be moved in either forward or rearward "direction from a normal intermediate position,

and av striker-plate with the inner'su'rface of which said hook is adaptedto engage, and manual means for retracting said'hook lat orally and said bolt longitudinally, one of said members having a beveled face upon itsend adaptedto engage and be forced longitudinally inward by saidstriker pl'ate as a door bearing said lock is swung to closed position.

7 The combinationof a supporting plate, a bolt mounted thereon and consistingof a movable member having a guided body portion and a hook member movably connected to said movable member and normally in laterally projected position, spring means permitting said movable member to be moved in either forward or rearward direction from a normal intermediate position and adapted to return it to said intermediate position, said hook being adapted to engage the inner surface of a striker-plate, and manual means for retracting said hook laterally and said bolt longitudinally, both of said members having beveled faces upon their ends adapted to engage and be forced inward loi'igitudinally by said striker-plate when a door bearing said lock is swung to closed position.

8. The combination of a supporting plate, a bolt mounted thereon consisting of a sliding member carrying a hook, means for yieldingly holding said bolt in an intermediate position from which it is free to move in either directon and said hook in a laterally projected position, and manually operative means engaging with said bolt for manually retracting said hook laterallyand said bolt longitudinally away from a striker-plate. I

9. The combination of a supporting plate, a bolt mounted thereon and consisting of a movable member having a guided body portion and a hook member movably connected to said movable member and normally in laterally projected position, spring means perinitting said movable memberto be moved in either forward or rearward direction from a normal intermediate position and adapted to return it to said intermediate po sitio-n, and a striker-plate with the inner surface of which said hook is adapted to engage, and manual means for retracting said hook laterally and said bolt longitudinally, said striker-plate being adapted to abnormally extend said bolt upon the separation of said supporting and said striker-plates by a relative movement parallel to the plane of said supporting plate.

10. The combination of a supporting plate, a. bolt mounted thereon and consisting of a movable member having a guided body portion and a hook member movably connected to said movable member and normally in laterally projected position, spring means permitting said movable member to be moved in either forward or rearward direction from a normal intermediate position and adapted to return it to said intermediate position. said hook being adapted to engage the inner surface of a strikerplate, and a lever for retracting said hook laterally and said bolt longitudinally, said hook member and lever havin one a cam surface sloping in a vertical irection and the other a laterally projecting surface adapted to engage therewith, one of said surfaces movingin a vertical direction as said lever is actuated.

11. The combination of a supporting plate, a bolt mounted thereon and consisting of a movable member having a guided body portion and a hook member movably connected to said movable member and normally in laterally projected position, spring means permitting said movable member to be moved in either forward or rearward direction from a normal intermediate position, said hook being adapted to engage the inner surface of a striker-plate, and a lever for retracting said hook laterally and said bolt longitudinally, said hook member having an upwardly sloping cam surface and said le ver having a laterally projecting face ongaging said cam surface and moving down wardly as said lever is moved in retracting direction.

12. A door latch comprising a proper in casement, a latch bolt provided with a beveled head forming a hook, said bolt being slidably mounted within said incasement and being capable of advancing said head through a perforation with which the face of said incasement is provided to and beyond normal latching position, spring means to advance and maintain said bolt in its normal latching position, counteracting spring means to return said bolt to its normal latching position when against the exertion of said counteracting spring means said bolt has been extended by external means beyond said normal latching position, and means to retire said bolt head within said incasement.

13. A door latch-catch comprising a proper incasement, a beveled head latch bolt slidably mounted within said incasement and being capable of advancing said head. to and beyond normal latching position through a perforation with which the face of said incasement is provided, a catch member pivoted to and carried by said latch bolt, said catch member normally projecting laterally from the beveled side of said bolt head, spring means exerted to normally maintain said catch member in its projected position, spring means exerted to advance and maintain said latch bolt in its normal latching position, counteracting spring means to return said latch bolt to its normal latching position when, against the exertion of said counteracting spring means, said bolt has been extended, by external means, beyond said normal latching position, and means to retire said catch member and said latch bolt head against their respective spring means within said incasement.

14. A door latch comprising a proper incasement, said incasement being provided with a bolt passage extending through the face of said incasenient, bolt advancingi spring means mounted within said 1ncase-,

ment, means with which said incasement is provided in said bolt passage to arrest the exertion of said spring means counteracting spring means mounted within said incasoment, means with which said incasement is provided in said bolt passage to arrest the exertion of said counteracting spring means, a latch bolt provided with a beveled head forming a hook, said bolt be in slidably mounted in said bolt passage of said incasement shoulders with which said latch bolt is provided lying between and respectivel engaging said spring means and said counteracting spring means, and means to retire said bolt within said incasement.

15. A door" latch-catch comprising a proper incasement, said incasement being provided ,wit-h a bolt passage extending through the face of said incasement, bolt advancing spring means mounted within said incasement, means with which said incasementis provided in said bolt passage to arrest the exertion of said spring vmeans, counteracting spring means mounted Withinsaid incasemenh means with which said incasement is provided in said bolt passage to arrest the exertion of said, counteracting spring means, a beveled head latch bolt slidably vmounted in said bolt passage of said incasement, shoulders with which said latch bolt is provided lying between and respec tivelv engaging said spring means and said counteractingspring means, a catch member pivoted to and carried by said latch bolt, said catch member normally projecting latnaaaaec erally ironrthebeveled sidegof said bolt head, spring means exerted to ,normally maintain said catch member in its projected position, and means to retire said catch member and said latch bolt against their respective spring means within said incasement, 7 I

16. Ina safety catch for swinging doors, comprising a striker-plate and a latch mechanisnn, the combination of a base-plate adapted to be secured. to a door, a hooked latch mounted thereon so-as to be movable longitudinally and. about arpivot relatively thereto and provided with a beveled face on its inner .side,' a striker-plate engaged by said beveled face so as to move said latch about said pivot as said door closes, said striker-plate having a rearwardly facing.

surface behind which the hook of said hooked latch lies after movement about said pivot when the door is closed, spring means for permitting said hooked latch to be drawn longitudinally outwardrelatively to said base-plate and said base-plate and striker-plate. to be drawn apart when said hook is in engagement with said rearwardly facing surface and'tending to restore said parts to normal position and manually actuated means for freeing said hooked latch from holding engagement with said strikerplate so as to permitpthe opening of the door.

In testimony; whereof I have signed my name to thisspecification,

GEORGE HENRY ELWELL. Witnesses VVILLIAM C. Pam's LYDIAR. ELWELL.

Copi espf this patent may be obtained for five cents each, by: addressing the Commissioner of Eatenta v Washington, DJ)!

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