US1040764A

US1040764A - Rim night-latch.

Info

Publication number: US1040764A
Authority: US
Inventors: Edward Rose
Original assignee: NORWALK LOCK Co
Current assignee: NORWALK LOCK Co
Priority date: 1912-04-08
Filing date: 1912-04-08
Publication date: 1912-10-08
Anticipated expiration: 1929-10-08

Description

E. ROSE.

RIM NIGHT LATCH.

MPLIOATION FILED 111111.11. 1912.

E. ROSE.

RIM NIGHT LATCH.

APPLICATION FILED APR. s. 1912.

1,040,764. Patented oct. s, 1912.

2 SHEETS-SHEET 2.

@l HQ, 9 lldlllllwl/lll 79 WITNESSES: /lVl/EN TUR By @WWW A TTRNEY UNITED STATE@ PATENT OFFICE.

EDWARD ROSE, 0F MAMARONECK, NEW YORK, ASSIGNOR TO NORWALK LOCK COM- PANY, OF SOUTH NORWALK, CONNECTICUT, A CORPORATION OF CONNECTICUT.

RIM NIGHT-LATCH.

Specification of Letters Patent.

i Patented Oct. 8, 1912.

Application led April 8, 1912. Serial No. 689,164.

.To all whom it may concern:

Be it known that I, EDWARD Rosa, a citizen of the United States, residing at Mamaroneck, county of Westchester, State of New York, have invented an Improvement in Rim Night-Latches, of which the following is a specification.

This invention relates to rim night latches and has for its object to reduce the number of parts and to generally simplify and improve their construction and increase their efficiency in use.

An especial object of the invention is to provide means whereby it is rendered impossible for the bolt to be retracted by the insertion of an implement between the door and the jamb.

A further object of the invention is to provide means for attaching the latch to the door, which will render it practically im possible to detach the latch when the door is closed and will enable it to be detached and replaced quickly.

Vith these and other objects in view, the invention consists in certain constructions and in certain parts, improvements and combinations which will be hereinafter dcscribed and then particularly pointed out in the claims hereunto appended.

In the accompanying drawings Jforming a part of this specification, Figure 1 is an in teriorview of my novel night latch, the back plate being removed and the parts shown in the locking position; Fig. 2, a similar view with the parts in the unlocked position; Fig. 3, a similar view illustrating the positlon ot' the parts when the latch bolt has been Jforced inward as by the striker or by operation of a roll back; Fig. 4l, a perspective ot' the slide and the secondary slide detached; Fig. 5, a horizontal section on the line. 5--5, in Fig. l, looking in the direction of the arrows; Fig. G, a perspective of the holding plate detached; Fig. 7, a section on line 7-7 in Fig. 8, looking in the direction of the arrows; Fig. 8, a section on line 8-8 in Fig. 7, looking in the direction of the arrows; Fig. 9 a detail sectional view on line 99, in Fig. 8, looking in the direction of the arrows; and Fig. 10 is a detail sectional virw of the front end of the case.

2O denotes the case which is provided in its front end with a groove Q1 to receive the end of the back plate 2Q and with an opening 23 to receive the latch bolt 4S) which is provided on opposite sides ot' the shank.

with arms 29 which extend backward and are provided with recesses 30 for a purpose presently to be explained.

50 denotes the operating spring which surrounds the shank and bears against the bolt and against a washer 5l which in turn rests against block 28. The shank is retained in place in groove 27 by means of a lug 52, see Fig. 5, which projects tronrthe back plate. It will be noted that shank 2G and arms 29 extend backward from the midwidth of the latch bolt which permits reversal ot the bolt without other changes, thus enabling the latch to be applied to either side ot a right or left swinging door.

3l. denotes a slide which lies below the shank of the holt and is provided at its forward cnd with upwardly extending lugs 32 adapted to engage the recesses 30 in arms 29 of the bolt. The rear end of this slide comprises arins $33 and 34 having at their ends angle arms 35 which extend above and below arms and $34: respectively. The lower ends ot' said arms are adapted `tor engagemcnt by a roll back Siti which is operated by a knob 87 and the upper ends ot' said arms are adapted for engagcmcnt by a roll back 38 (see Fig. 5) which is operated by a key .applied to a lock 5S. Arm S4 o'lE the slide is provided with a recess 30 which receives an upturncd lug 40 on a cross slidc 4l when the bolt is thrown and with a recess ft2 which receives said lug when the holt is in thc rctracted posit-ion to lock it retracted. The operation ot' this cross slidc is not illustrated in detail as specifically it 'torms no portion of the present invention. Arm 83 is provided with a recess Ll-, thc purpose ot` which will presently he explained, and with a headed pin 44 which passes through a slot 45 in a secondary slidc Lll super-posed and slidahlc on arm 38. The secondary slide is provided with an upturned lug 4T which lies within the corresponding lng 3Q on slide 31, bot-h lugs lying within the recess 30 in thc corresponding arm 29 ol the bolt, and with a recess (35 which corresponds with recess 43 in arm 33. l't will be notcd that lug 47 practically {ills the recess 30 in 'the direction of its length, so that the secondary slide will always move with the bolt.

53 denotes a dogging lever pivoted on a pin 54 projecting from the case and extending above the lever for a purpose presently to be explained. This lever comprises a forwardly extending arm indicated specifically by 55, a rearwardly extending arm indicated by 56 and an upturned lug indicated byv 57.

58 denotes a spring secured to the clogging lever and bearing against the case, its normal operation being to swing the forward arm of said lever downward.

59 denotes a dog pivoted on a headed stud 60 which passes through a clearance slot in the dogging lever and engages the case. The stud passes through a slot 61vin the dog which permits longitudinal movement thereof. The dog is provided with an arm 62 which engages lug 57 on the clogging lever, with a notch 63 which is adapted to engage pin 54 and with a. downwardly extending lug 64 which is adapted to be engaged by the end walls of recess 43 in arm 33 of the slide and of recess 65 in the secondary Slide.

66 denotes a bell cranklever pivoted on a pin 67 projecting from the case. This lever comprises an arm 68 which is adapted to engage arm 56 of the clogging lever, an arm 69 which is adapted to. be engaged by the angle arm upon arm 33 of the slide, and an arm 70 which is adapted to be engaged by the angle arm of'arm 34 of the slide.

71, denotesa spring carried by ypin. 67, one arm of which bears against the case, the other arm bearing against the bell crank lever and extending under said lever and bearing against the angle arm of arm 34 of the slide to normally move said slide forward. The action of this spring on the bell crank lever is to normally retain said lever in the raised position7 as in Figs. 1 and 2, that is, withv arm 68 out of engagement with arm 56 of the dogging lever.

72 denotes the keeper which is provided with the usual opening 73 to receive the b'olt,

with an ordinary striker plate 74 and with an abutment 75 (see Fig. 5) which is engaged by the end of the bolt and performs a vitally important function in the locking of the bolt against retraction, as will presently be fully explained.

In order to enable my novel night latch to be used ou the outer side of a door if required. and under all circumstances to render it impossible to remove thel latch from a door in the locked position, I dispense with the ordinary holding screws which pass through the case and provide means for securing the latch to the door, which are wholly concealed and to which access cannot be had when the door is locked. With this end in view I place the entire operating mechanism considerably below the edge of Macnee the case and secure the back plate to the case considerably below t-he edge thereof, leaving a space 76 within the'case outside the back plate.

77 denotes the holding plate which is secured to the door and to which the lock 78 is secured in any ordinary or preferred manner, but a single screw being used in the present instance to attach the holding plate to the door and two screws to attach the lock to the holding plate.

79 denotes a gripping slide which is attached to the o-uter face of the back plate by headed studs 80 passing through slots in the gripping slide and engaging the back plate. rllhe gripping slide is provided with a boss .81 having a threaded hole to receive a screw 82 which passes inward from the front of the case outside the back plate (see Fig. 5) and with a plurality of openings 85.

The holding plate is provided with a plurality of lugs 83 having inclined undercut faces 84. In attaching the latch, the'hold ing plate is first secured in place, then the latch is placed in position over it, lugs 83 passing through openings 85 and into clearance openings 86 in the back plate. Screw 82 inv then passed through the front of the case and turned into the threaded hole ,in boss 81, the effect. of which' is to draw the grippin slide forward and cause the rear walls o openings 85 therein to engage the inclined faces 84 of the lugs and draw the case tightly against the door.

lThe operation is as follows: When the door is open, the parts will be in the position shown in Fig. 2. When the door is closed the b olt will engage the striker plate and be forced back to its inmost position as in Fig. 3. As soon as the bolt comes into alinement with opening 73 in t-he keeper, spring 50 will throw the bolt which will engage abutment 75 in the keeper. as clearly shown in Fig. l. Simultaneously withthe forward movement of the bolt, spring 714 will move the slide and the bell crank lever from the position shown in Fig. 3 to that in Fig. 1. As soon as arm 56 of the bell crank lever releases the dogging lever, spring 58 will swing the dogging lever to the position shown in Fig. l in which arm 55 of the dogging lever lies back of the bolt and dogs it, that is, absolutely blocks its backward movement.

It should be understood that the dogging action of the (logging lever is made possible by the engagement of the bolt with the abutment in the keeper, that is to say, the bolt is stopped by the abutment before reaching the extreme of its throw. The withdrawal of the bolt from the keeper to open the door may be eifected by either of the roll backs, that is, from the inside by means of the knob and from the outside by means of a key Latorre@c applied to the lock, both of the roll backs as already explained, engaging angle arms 35 ot' the slide. When the slide commences to move backward the first effect will be thel engagement of angle arms 35 with arms 70 and 69 of the bell crank lever which will be swung on its pivot and arm 68 of said lever, l through its engagement with arm 56 of the dogging lever, will swing the forward end (arm 55) of said lever upward and retain 5 it in the raised position which will release the bolt. An instant later lugs 32 upon the slide will engae the rear walls of recesses 30 i in arms 29 ot the bolt and will draw the bolt backward under the dogging lever. As

soon as the roll back is released, whether' operated by key or knob, the operating spring will throw the bolt to the eXtreme of its movement, it being understood of course,

that the door to which the latch is applied is in an open posit-ion. As soon as angle arms 35 pass out of engagement with arms 70 and 69 of the bell crank lever, said lever will be tilted as before by spring 7l which will release the dogging lever. An instant later,

however, downwardly turned lug 64 upon dog 59 will be engaged by the rear wall of recess in the secondary slide which always moves with the bolt. The secondary slide, as

it moves forward, will tilt the dog on its pivot and arm 62 of the dog will engage upturned lug 57 on the doggmg lever and retain 'the forward end of said lever in the raised position against the power of spring 58. The dog, at the beginning of the movement just described, will be in substantially the position shown in Fig. 3. At the end of the movement it will be in the position shown in Fig. 2, notch G3 in the dog being in engagement. with pin 54 whereby the dog and the logging lever are locked in the position shown. The necessary movements of the dog are permitted by slot 61 therein, and

the parts are retained in the locked position through the co-action of spring 58, lug 57 on the (logging lever and arm 62 of the dog.

It will be understood, therefore, that when the forward movement of the bolt is limited by its engagement with the abutment in the keeper it is locked in this position by the dogging lever, but if the bolt is thrown to the eXtreme of its movement, which is oneeighth of an inch more or less, greater than its lmovement when stopped by the abutment,

the dogging lever is retained out of operative position in the manner just described and locked there, and the latch bolt may be readily moved inward.

In the fully thrown position of the latch bolt just described, the locking dog is locked out of operative position. The manner of its release is as follows: The backward movement ot the latch bolt caused by its engagement by the striker' plate moves the second- 65 ary slide backward and an instant later pir-.ks

up slide 31 and carries that backward also. The movement of the secondary slide causes the front wall of recess 65 therein to engage downwardly turned lug 64 of the dog and move said dog backward disengaging the notch therein from pin 54 and leaving the dogging lever unlocked. The angle arms of the slide now engage arms and 69 of the bell crank lever, tilt said lever and cause arm 68 thereof to engage arm 56 of the dogging lever and lock said lever in the raised position, as in Fig. 3, against the power of spring 58, this engagement of arm G8 of the bell crank lever with arm 56 of the clogging lever being simultaneous with the release of the clogging lever by the dog. The parts are now in the position shown in Fig. 3. The operation ot' the parts would have been substantially the same had the bolt been retracted by the knob, as for example should it be required to lock the bolt in the retracted position by the cross slide.

Suppose now, with the parts in the position shown in Fig. 3, that the bolt is released. If in alinement with the keeper, the bolt will engage the abutment and the parts will assume the position shown in Fig. 1, the dogging lever engaging the head of the bolt and locking it against retraction. Should the bolt not be in alinement with the keeper, the parts will assume the position shown in Fig. 2, the clogging lever being locked out of operative position by the dog. When the parts are in the position shown in Fig. l, the

` only possible way of retracting the bolt is by operation of either the knob roll back or the lock roll back. The first operation of either of these roll backs is to retract the slide and tilt the bell crank lever which swings the flogging lever out of operative position and leaves the bolt free to be moved backward by continued movement of the slide.

Having thus described my invention, I claim:

1. In a night latch the combination with a spring controlled bolt and a keeper having an abutment adapted to be engaged by the bolt to limit its throw, of a clogging lever and means for moving said lever into positien to lock the bolt against retraction when its forward movement is limited by engagement with the abutment.

2. In a night latch the combination with a spring controlled bolt and a keeper having an abutment adapted to be engaged by the bolt to limit its throw, of a flogging lever, means for moving said lever into position to lock the bolt against retraction when the bolt is in engagement with the abutment and means for swinging said lever out oi operative position when the bolt is drawn backward.

In a night latch the combination with a spring controlled boltI and a keeper having :fait

an abutment adapted to be engaged by the bolt to limit its throw, of a slide engaging the bolt, a dogging lever adapted to engage the bolt when the latter is in engagement with the abutment and a bell crank lever engaging the slide and adapted to swing the dogging lever out of operative position when the slide is drawn backward.

4. In a night latch, the combination with a spring controlled bolt anda dogging lever, for the purpose set forth, of a sli e engaging the bolt, a secondary slide also engaging the out of operative posit-ion.

5. In a night latch, the combination with a spring controlled bolt and a keeper having an abutment adapted to be engaged by the bolt to limit its throw, of a slide loosely engaging the bolt, a secondary slide also engaging the bolt, a dogging lever adapted to engage the bolt when the latter is in e11- gagement with the abutment, a bell crank lever engaging the slide and adapted to engage the dogging lever, Afor the purpose set fortlnand a dog engaged by the slide and the secondary slide and adapted to retain the dogging lever out of operative position.

6. In a night latch, the combination with a spring controlled bolt and a keeper having an abutment adapted' to be engaged by the bolt to limit its throw, of a slide loosely engaging the bolt, a secondary slide also engaging the bolt, a dogging lever, for the purpose set forth, a sprlng controlled bell crank lever engaging the slide and adapted to engage the dogging lever and a longitudinally movable dog having an arm adapted to engage the dogging lever and a notch and a pin adapted to engage the. notch, whereby the dogging lever is retained out of operative position.

7. In a night latch, the combination with a spring controlled bolt and a dogging lever, for the purpose set forth, of a slide engaging the bolt, a spring controlled bell crank lever engaging the slide and adapted to engage the dogging lever, and a longitudinally movable dog having an arm adapted to engage the dogging lever and a notch, and a pin adapted to engage the notch, whereby the dogging lever is retained out of operative position.

8. In a night latch, the combination with a spring controlled bolt having rearwardly extending arms provided with recesses and a keeper having an abutment adapted to be engaged by the bolt, for the purpose set forth, of a slide having lugs loosely engaging the recesses inthe arms, a dogging lever for the purpose set forth, a spring controlled bell crank lever engaging the slide and adapted to engage the dogging lever and a dog adapted to retain the dogging lever out of operative position.

9. In a night latch, the combination with a spring controlled bolt having rearwardly extending arms provided with recesses, and a dogging lever, for the purpose set forth, of a slide having lugs loosely engaging the recesses upon the arm, a bell crank lever engaging the slide and adapted to engage the dogging lever, and a longitudinally movable dog having an arm adapted to engage the dogging lever and a notch adapted to receive a pin to retain the dogging lever out o-f operative position.

10. In a night latch, the combination with a spring controlled bolt having a shank and recessed arms extending backward from its midwidth whereby the bolt is made reversible and a keeper having an abutment, for the purose set forth, of a dogging lever,

-means or moving said lever into position to lock the bolt against retraction when in engagement with the abutment and means for swinging said lever out of operative position when the bolt is swung backward.

11. In a night latch, the combination with a spring controlled bolt and a keeper having an abutment adapted to be engaged by the bolt to limit its throw, of aspring controlled dogging lever pivoted on a pin, a slide loosely engaging the bolt, a secondary jslide also engaging the bolt, a bell crank lever engaging the slide and adapted to engage the dogging lever, and a longitudinally movable dog which is controlled by the slides, is adapted to engage the dogging lever and is provided with a notch which reeeives the pin to lock thedogging lever out of operative position.

12. Ina night latch, the combination with a spring controlled bolt and a keeper having an abutment adapted to be engaged by the bolt to limitits throw, of a spring controlled dogging lever pivoted on a pin and having an upwardly extending lug, a slide y loosely engaging the bolt, a secondary slide also engaging the bolt, said slides being provided with recesses, a bell crank lever engaging the slide and adapted to engage the dogging lever and a longitudinally movable dog having a downwardly extending lug adapted to be 'engaged by the end walls of the recesses in the slides, an arm adapted to engage the lug on the dogging lever and a notch adapted to receive the pin to lock the dogging lever out of operative position.

13. In a night latch, the combination with a spring controlled bolt and a keeper having an abutment adapted to be engaged by the bolt to limit its throw, of a slide loosely engaging the bolt and comprising arms having angle arms at their rear ends, a secondary slide also engaging the bolt, a dogging lever, for the purpose set forth, a

spring controlled bell crank lever having an arm adapted to engage the dogging lever and other arms ladapted to be engaged by the angle arms of the slide, whereby the bell crank lever is caused to raise the operative end of the clogging lever, and means for locking the dogging lever in the raised position.

14. In a night latch, the combination with a spring controlled bolt and a keeper having an abutment adapted to be engaged by the bolt to limit its throw, of a slide loosely engaging the bolt and comprising arms having angle arms at their rear ends, a secondary slide moved by the bolt, a dogging lever pivoted on a pin and having an upwardly extending lug, a bell crank lever having an arm adapted to engage the dogging lever and other arms ada ted to be engaged by the angle arms o the slide whereby the bell crank lever is caused to raise the operative end of the dogging lever, and a longitudinally movable dog having a lug adapted to be engaged by the slides, for the purpose set forth, an arm adapted to engage the lug on the clogging lever and a notch adapted to receive the pin to lock the dogging lever. out of operative position.

15. In a night latch, the combination with a keeper having an abutment and a bolt whose throw is limited by engagement with the abutment, ot a do ging lever adapted to lock the bolt in tlrown position and means actuated by retraction of the bolt for swinging the dogging lever out of operative position.

16. In a night latch, the combination with a keeper having an abutment and a bolt whose throw is limited by enga ement with the abutment, of a slide by which the bolt is retracted, a dogging lever adapted to lock the bolt in the thrown position, and means acting when the bolt is retracted by the slide for swinging the dogging lever out of operative position.

17. In a, night latch, the combination with a keeper havin an abutment and a bolt whose throw is'limited by engagement with the abutment, of a slide by which the bolt is retracted, a dogging lever adapted to lock the bolt in the thrown position, a bell crank lever engaged by the slide and adapted to swing the dogging lever `out of operative position, and means for retaining the dogging lever out of operative position.

18. In a night latch, the combination with a keeper having an abutment and a bolt whose throw is limited by engagement with the abutment, of a slide by which the bolt is retracted, a secondary slide moved by the bolt, a dogging lever adapted to lock the bolt in the thrown position, a bell crank lever engaged Vby the slide and adapted to swing the dogging lever out of operative position, and a longitudinally movable dog engaged by the slide and acting to retain the dogging lever out of operative position. 19. In a night latch, the combination with a keeper having an abutment and a` bolt whose throw is limited by engagement with the abutment, of a slide by which the bolt is retracted, a secondary slide moved by the bolt, said slide being provided with recesses, a dogging lever ivoted on a pin and adapted to lock the bo t in the thrown position and provided with an npturned lug, a bell crank lever engaged by the slide and adapted to swing the dogging lever out of operative position, and a longitudinally movable dog havin a lug adapted to be engaged by the wal s of the recesses in the slides, an arm adapted to engage the lug on the dogging lever and a notch adapted to receive the pin, whereby the dogging lever is locked out of operative position.

20. In a night latch, the combination with a keeper having an abutment and a bolt whose throw is limited by engagement with the abutment, of a dogging lever within the `ae which acts to prevent retraction of the In testimony whereof I affix my signaturein presence of two witnesses.

EDW'ARD ROSE.

'Witnessesz HENRY HOFFMAN, MonToN R. MCCAUSLAND.