US1275246A - Locking and latching mechanism. - Google Patents

Description

l. GREENFIELD.

LOCKING AND LATCHlNG MECHANISM.

APPLICATION FILED MAY 18. 1918;

1,275,246. Patented Aug. 13, 1918..

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' changes and alterations in th of the invention is to connection with usually employed to inclose elevator shafts UNITED STATES "PATENT oFF oE.

ISIDORE GREENFIELD, or Bnooxmm, nEw YORK.

' LOOKING AND LATCHING MECHANISM. I v

' M Specification of Letters Patent.

To all whom it may concern:

Be it known that I, ISIDORE GREENFIELD, a citizen of the United States, residing at Brooklyn, in the county-of Kings and State of New York, ave invented new and useful Improvements in Looking and Latching echanism, of which the following is a specification.

his invention relates to locking and latching mechanism, and a principal object rovide a novel and efiicient locking and ing of my atching mechanism which is designed particularly for use in sliding doors such as are at the floor lan gs, such as are used for Warehouses, railway cars and in other analogous capacities, but which in addition is also capable of being used in swinging doors if desired.

other object of the invention is 'the provision of a keyoperated locking and latching mechanism of this character having connection with rat mea Au gla, 1918.

Application filed May 18, 1918. Serial No. 285,846. I

improved loc k, showing the working parts in elevation as they appear when in their relative unlocked positions. v

Fig. 2 is a similar view with the working parts-shown in their-relative locked posi-' tions;

Fig. 3 is a cross sectional view, taken on v the line 3-3 of Fig. 1

- F1g.- 4 is a 'fragmental front elevational vlew, showing a mode of attaching the lock to a sliding door,

Fig. 5 is a side 'elevational view, partly 1 broken away, illustrating how the lock may be secured to the door, and illustrating also a common type of key-operated mechanism for the operation of the lock.

ig. 6 is a front elevational view of the look as it appears from the outside of a oor. v

Fig. 7 is a fragmental front elevational view of the lock and the keeper for the latch bolt, this view showing in particular sliding bolts arranged to be actuated in opposite directions as means through which to lock the door from opposite sides, and also having a latch bolt working across the sliding bolts and arranged to be extended cordingly as the said sl'ding bolts are moved into locked or unlocke position. 1 Another object of the invention is the d automatically locked or unlocked ac provision of a lock of this charactenwhich 1s key-operated from one side only so that when applied, for instance, to the doors guarding elevator shafts, the lock can only be operated from the inside of the shaft so as to'safeguard against picking or tampering wit the lock from the outside.

With the foregoing andother objects in view, the invention resides in the details of construction and in the arrangementand combination of parts hereinafter described, defined in the claims, and shown in cjompanying drawin s forming a part, of.

the acthis. specification; it eing understood that e precise em bodiment of the invention herein shownzmay be made, to which changes and alterations the inventor is entitled, provided the same are efi'ected in the scope of the accompany-. ing claims.

In the accompanying drawlngs, Figure 1- is a longitudinal section through the cascompanying drawings,

Mounted upon t a modified form of latch bolt.

Fig. 8 is a cross sectional. view, taken in the direction of the line 8-8 ofFig. 7.

ith more particularreference to the ac wherein like characters of reference, indicate like parts,- the lock'casing comprises two sections or plates one lOythe rear sect1on, which is intended to lie liatagainst a door as 11 u on the outside thereof, and the other 12,.t e front section,- which isformed all'around with the sides 13, the edges of' the casing which comes adjacent to the j amb 17, and'the other set 18 projecting similarly from the opposite end thereof they extend through openings in the front casing 12 with thelr outer ends lying flush or front surface thereof.

with the outer at the corners the side the rear section alined. guide posts; one set 16:

ese sets o f,guide posts for as shown. 'The lengthofthese guide posts are such that sliding movement are bolts 19 and 20, re-

spectively, with their opposite ends extending'through suitableopenings provided in the top and bottom side flanges 13. As shown in Figs. 1 and 2, the confronting sides of these sliding bolts areprovided with teeth 21 to mesh with a gear 22 fastupon a shaft 23 which extends through the casing midway between said sliding bolts. One end of the shaft ,'s journaled for rotation in a socket 24 provided upon the inner side of the front section 12, while the other end thereof extends throughan opening 25 provided in therear section 10.

Fast upon the shaft 23 in advance of the gear 22 is a tumbler or cam shaped device '26, about which extend the parallel sides 27 and 28 and connecting cross pieces therefor 29 and 30 of the body or shank portion of the latch bolt 31, which works through an 32 provided in the side flange 13, and the forward end of which is made with a vertically hooked end 33 designed to engage over a keeper 34, secured to the jamb 17. The latch bolt thus formed extends lengthwise of the casing across the sliding bolts 19 and 20, is held against displacementby the front casing section 12,

and is limited in its movements by the sets of guide posts 16 and 18. It is thus maintained for free swinging movement and is unconnected with any part except by a) spiral push spring 35, mounted around a pin 36, one end of which slides through an opening provided in the cross connection 30, and the opposite end of which is pivotally connected to a lug 37, which projects from the side flange 13. The opposite ends of the push spring 35 are conected. respectively with said cross connection and said lug, so 4 that the spring normally urges the latch a bolt into extended position: Another spring 38, angular in form, projects from the upper edge of the'body part 27 so as to impinge against the adjacent guide post 16 in such manner as to wardly into horizontal position with the hook 33 engaged over its keeper.

The whole arangement is such that the latch bolt is thus engaged with its keeper when, through the actuati n of the gear 22, the sliding bolts 19 and 2 are extended in opposite directions to lock the door 11 at its bottom and .top edges by means of the bars 39 and 40, which are pivotally connected respectively with said sliding bolts, the remote ends of said bars'being guided by staple devices as 41 so as to enter recesses as 42 or suitable keepers provided in the door jamb When the gear 22 is turned in the oppositev direction to retract the sliding bolts and to withdraw the bars 41, the

tumbler 26 impinges against the underside of .the latch bolt member 27, lifting the latch bolt upwardly in an obvious manner, so as force the latch bolt doWn-' to disengage the-hooked end 33 from its keeper, the end of the spring 38 in the latter instance, being accommodated by a recess 43 conveniently provided in the side flange.

As a means-of positively locking the latch bolt against movement relatively with respect to the sliding bolts when the latter are in locked position, I prefer to provide the sliding bolt 19 with an integral lug 44 having a projecting pin 45 which enters the slot 46 provided in the upper edge of the latch bolt. As the' sliding bolts 19 and 20 are moved by the gear into unlocked position,

the pin 45 is withdrawn from its seat 1n an obvious manner to permit the raising of the latch bolt. Ttwill be observed in Fig. 1 that when the latchbolt is raised by the tumbler 26, it still projects, in the present embodiment of the invention, beyond the end of the side flange 13, although released from its keeper in such manner that the sliding door 11 may be moved away from the In order that this mechanism may be employed with types of keepers other. than that like 34 herein'shown, provision 1s made for withdrawing the latch bolt wholly within the lockcasing by securing to cross connection 30, a stem 47 which works in a diagonal slot 48 provided in the casing section 12. Connected with this stem upon the outside of the casing is a thumb piece 49 which may be employed in an obvious manner to manually-retract the latch bolt within the casing against the tension of the push spring 35, the latch bolt in this case sliding upon the opposite To secure the latch-bolt in retracted position, it provide a thumb piece 50 exterior of the casin the stem of which works ina vertical slot 51, and to which .behind the slot is secured -a collar 52 and in front of the slot a longitudinal plate 53 whereby the thumb piece is held inoperative position,

so that'the inner end of the stem may engage larger than the slot 48 so as to conceal the latter irrespective of the relative position of the thumb piece. Similarly, the outer elongated plate 53 is made considerably larger than the slot 51 so as to conceal the latter.

As a means .-of operating and locking the shaft 23 I provide any suitable cylinder lock ends of the tumbler 26.

having a rotatable barrel which may be locked and unlocked with its keeper. Thus,- in Fig. 5, I show a barrelkeeper 56 which is set in a suitable opening provided on the inner side of the door'11, this keeper at its inner end being provided with lugs 57 upon opposite sides, which areconnected by means of bolts and screws as 58 with the the proper key, by which the. are retracted and the barrel rotated in the sections, key-controlled means tween said sliding to overlie the upwardly to be used on a swinging door.

.by said sha rear casing section 10. The rotatable key barrel 59 arranged in the keeper is provided witha reduced outer ,end 60 of squarefor mation which projects into a suitable opening provided longitudinally in the said shaft 23. The barrel 59 is, of course, provided with the usualkey slot for the eeper pins usual way.

form of latch bolt 61, the end ofwhich is here shown bent outwardly at'right-angles ecting extension 62of the keeper, thisbolt bemg otherwise constructed andoperated precisely like the latch bolt'3l, and

Having thus described my invention, what claim isz-v I 1.. A look for doors includinga casing, bolts slidably arranged therein and extending through the opposite sides of the casing, t econfrontiif vided with teet a rotatable shaft, a gear thereon' in ,mesh with the teeth spective bolts, a latch bolt slidably extending across said sliding bolts, means on said shaft to raise said latch bolt when said sliding bolts are moved into unlocked position, and means for positively locking said latch bolt when said sliding bolts aremoved into locked position.

2. A ock for doors including assembled casing sections, a pair of parallel spaced apart bolts slidablyextend' sections, saidbolts being provided with teeth on their confronting faces, a ear in mesh with the teeth of each of said olts t'o actuate the same in opposite directions, 'a latch bolt slidable across said sliding bolts and working through the end of the assembled said gear, a tumbler operated by said keycontrolled means for raising said'latch bolt when said sliding bolts are moved into unlocked position, and means for locking said latch bolt with one of said sliding bolts when the latter are vmovedlinto lockedposition, Y

3.'A lock for doors inclu pair of parallel bolts slidab e through said 'casmg m' spaced-apart relation, said bolts their confrontbeingprovided with teeth on mg sides, a keyperatedshaft bolts, the

midway bea gear fast on said s aft 1n mesh with ing bolts and adapted caslng to engage a keeper,

a tumbler carried t to raise said latch bolt as the a sliding bolts are moved into unlocked position, spring means for automatically extending said latch bolt into locked position as said sliding bolts are moved into locked position, and means for reception of and outwardly pro-- adapted g sidesof said bolts being prob of the relng through said for operating when thebolts' sition, spring means for guiding said bolt into engagement with its keeper as mg a casing, a

teeth of each of said bolts, a latch bolt slidable across said slid-' to extend beyond the positively locking said latch bolt with one of said slidingnbolts when the latter is moved into locked po- 4. In a door lock, assembled casing sections, bolts slidable therethrough in parallel spaced teeth on their confronting sides, a shaft operatively secured in the casing transversely v I thereof midway between said sliding bolts, In Flgs. 7 and 8, I illustrate a modlfied tend beyond said casing sections to engage its k raise said latch bolt from its sliding bolts are drawn into. unlocked position, means for automatically causing said latch bolt to engage its keeper as said sliding bolts are moved into locked position, means for positively locking said latch bolt with one of the sliding bolts when all of said Its are forced into locked position, means for moving said latch bolt independently of said sliding .bolts when all the bolts are in unlocked position, and key-controlled mechanism for operating said shaft.

. 5. A look for doors including a casing, bolts slidable through saidcasing in spacedapart parallel relation and provided with teeth on their confronting sides, shaft rotatably-arranged in said casing midway between said bolts at right-anglesthereto, va gear fast on said shaft in mesh with each of said bolts to actuate directions, a latch bolt arranged in said casing to slide across said sliding bolts and adapted to extend beyond the casing to engage a keeper, a tumbler on said shaft to' impinge and raise said latch boltfrom its eeper as said sliding bolts are moved into unlocked position, spring means engaged between said latch mally urge said eeper, means carried by said shaft to latch bolt into extended position, said tumbler being arranged to operate against the tension of said sprin means are moved into unloc ed 0- and tilting the sliding bolts, are moved into locked po-a sition, and means for actuating said latch bolt independently of said sliding bolts when the latter are 'in unlocked osition.

6. In a lock for doors,'the com ination of two sliding bolts arranged .in spaced-apart parallel relation,said bolts having teeth in their confrontiilgfaces, an operating gear in mesh with each of said bolts, a latch bolt slidably arranged across said sliding bolt and adapted to engage a keeper, means for causing said latch bolt to engage its keeper when said sliding bolts are moved into locked position, and means carried by one of said sliding bolts toengage-said latch bolt holdapart relation and provided with keeper as said the same in opposite bolt and saidcasing to nor- V ing it positively against disengagement when said sliding bolts are moved into locked position.

'27. In a door lock, the combination of a 5 slidingt olt provided with teeth on one side, a sha a gear mounted on said shaft in mesh with said sliding bolt to actuate the latter, a latch bolt arranged across said sliding bolt and adapted to engage a keeper,

1 means on said shaft to raise said latch bolt from its keeper as said sliding bolt is moved into unlocked position, and means on said sliding bolt to engage said latch loolt Whereby to hold the same positively locked with its keeper when the sliding bolt is moved 15 into locked position.

In testimony whereof I have signed my name to this specification.

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