US2370691A - Door lock - Google Patents

Description

March 6, 1945.

w. R. SCHLAGE 2,370,691

DOOR LOCK Filed April 30, 1941 2 Sheets-Sheet l 46 3 24- z A l l 1:

'3 as 19 q 2, as g mgwa c 5/ 7 A 35 INVENTOR. 34 mt as B ATTORNE March 1945- w. R. SCHLAGE DOOR LOCK 2 Shets-Sheet 2 Filed April 30 1941 INVE TOR. M72 QM. BY

Patented 6, 1945 UNITED STATES PATENT orrlca noon noon Walter R. Schlage, Burlingame, Calif., minor to Schlage- Lock Company. San

min.

a corporation of Califo Application April 30, 1941, Serial No. 391,024 12 Claims. (Cl. 292-169) This invention relates to door locks of the type disclosed in my co-pending application, entitled "Door lock, filed April 21, 1941, Serial No. 389,- 512, and especially td a lock of which employs a single spindle.

In the door lock disclosed in my co-pending application above referred to. -two latch bolts are disclosed which are referred to as the main and the secondary latch bolts, and both or either of them may assume a projected or a retracted position. Each latch belt is attached to a retractor plate, and these plates are actuated by rollback members formed on an inner and an outer spindle. Within these spindles is mounted an actuator which controls the position of the secondary ually operated by a pushbutton mounted in the inner spindle.

The invention is shown by way of illustration in the accompanying drawings, in which Fig. 1 is a horizontal on line 1-1 of Fig. 2, said view showing the main longitudinal section taken undog the spindle and i v Francisco, Calif latch bolt in normal projected position, the secondary bolt in retracted positi n, and the single spindle and the knob secured thereto in undogged position;

Fig. 2 is a vertical longitudinal section taken on line II-II of Fig. 1;

Fig. 3 is a section similar to Fig. 1, showing both latch bolts fully projected and the single spindle and the knob secured thereto in dogged position;

Fig. 4 is a perspective view of the retractor plate which carries the secondary latch bolt;

Fig. 5 is a perspective view of the retractor plate which carries the main latch bolt;

Fig. 6 is a perspective view of the key actuated tumbler cylinder;

Fig. 7 is a perspective view of the actuator which controls the position or the secondary latch bolt and the dogging member; and

Fig. 8 is a plate 4. Secured between the plates 2 and 3 of the lock housing is a U-shaped frame consisting of upper and lower horizontally extending arms 5 and 6 which are connected at the rear ends by an end bar I. The forward ends are provided with right-angularly bent lugs 8-8, and they aresecured to the face plate 4 by rivets, counter-sunk screws or the like. such as indicated at 9.

of shoulders i6-l6 which are adapted to be engaged by a rollback member hereinafter to be described.

The secondary latch bolt C is similarly .attached to or formed as an integral part of a rectangular-shaped retractor plate generallylindicated at c. This Plate has projecting eages'ina v the key actuated cylinder.

extending into the guide slots li-ll formed in the arms 5 and I, heretolore referred to. 7 plate also has an elongated-opening m formed therein, rearwardly of which is a head No. This presents a face ila adapted to be engaged either by the rollback member or theactuator heretofore referred to. The head also carries a dogging lug l1 and a spring seat' "a a similar the head ll of the other retractor plate.

The latch bolt 0 consists oi a plate I! and a pair of right-angularly bent portions -20 which form a guide and a guard for the latch bolt B, as will hereinafter be described.

Formed on the side plates 2 and l o! the lock housing are outwardly extending bearing hubs which is iournaled a spindle generally indicated at D. This spindle is best show at 28 is enlarged and outer ends of the spindle are diameter, as indicated at 2!. The central enlarged portion is cross-slotted as at 25, and a rollback member 28' is thus formed. The opposite sides of the cross slot are notched as shown at 21, and one or the other of these notches is provided for the reception of the dogging memoer II. In as much as there is only one dog I! formed on the retractor plate 0, only one of the notches 21 would be required, but two are preterably employed, as this allows for both righthand and left-hand installations.

A pair of knobs 3t and ii are secured in any suitable manner on the opposite ends of the spindle. The knob 30 will hereinafter be reierred to as the outer knob, and the knob SI as the inner knob. Insertible through the inner end of the spindle is a bar 32 which is circular in cross section and snugly the spindle, which is tubular. A collar 33 is formed on the outer end of said bar and engages the end of the spindle. This collar is overlaid by an annular shoulder 14 o! the knob. and the bar in the spindle, in the form of a turnpiece 35 is formed on the outer end of the bar and projects beyond the face of the knob 3i to permit it to be grasped so as to rotate the bar. The bar is best shown in Figs. 1, 3 and 'Z. Adjacent its inner end it is cross slotted to form a flat face 36 and a half round or semi-circular rounded portion 36c, which will hereinafter be referred to as the actuator. Beyond that is a cylindrical extension 31, and on the end thereo! is formed 8. lug a which terminates in a pin "a.

Extending through the outer knob 30 and into the tubularspindle is a key actuated tumbler cylinder 39 (see Figs 1, 3 and 6). The spindle proper functions asa housing for the cylinder and the tumblers l0 normally ll formed in the spindle, and thus secure the cylinder against rotation within the spindle. However, by inserting a key, the tumblers 40 are retracted and the cylinder is then tree to rotate and when it'ls i'otated 9. lug 42 formed on the inner end engages the lug 88 of the actuator and rotation is. thereby imparted to the actuator by The pin 88a on the actuator extends into a recess 38b formed in the end of the key actuated tumbler cylinder 39. This is desirable, as it centralizes the bar 32 with relation to the tumbler cylinder 39 and furthermore prevents improper application or rotational movement between the lugs SI and 42. The key fits the interior 0! actuated tumbler cylinder has a collar ll termed on its outer end, and this is overlaid by an annular shoulder 48 iormed on the knob Ill. The key cylinder is thus secured against endwise movement but is free to rotate within the spindle when a key is inserted.

The normal position of the mechanism is that shown in Fig. 1. In this position the main latch bolt B will beproiected and the secondary latch bolt will assume a retracted position, and as the dog I! is carried by the latch plate c the dog will assume a position rearwardly oi the spindle and the notches 21 formed therein. Thus the the knob which was spindle may be rotated by either or the knobs and when it is rotated the rollback member 28 will engage one or another of the shoulders it formed on the retractor plate b, and this re tractor plate will thus be forced inwardly within the lock housing against the pressure of a spring 50, and as the retractor plate b moves inwardly the main latch bolt B attached thereto will be retracted, and the door may be opened, and when previously rotated to rotate the spindle is released, a spring 50 will force the retractor plate back to normal extended position so as to extend the bolt B, and the spindle and knobs will obviously return to normal position and be held in that position by the shoulders i6 0 3. It is urged to that dog the spindle against rotation engaging the face of the rollback member.

I! a person is in a room and desires to lock the door against intruders, it is only necessary for that person to grasp the turnpiece 35 and rotate the bar 32 so that the actuator 88 moves from the position shown in Fig. 1 to the position shown in Fig. 3. This requires a halt revolution of the turnpiece. and it permits the retractor plate c to follow and to drop into the cross slot formed in iront of the actuator. This position of the secondary retractor plate is shown in Fig. position by a spring II, and it will remain in that position until the ac- :tuator is re-rotated a hall revolution either by the turnpiece 35 or by the key actuated mechanism hereinafter to be described. when the secondary latch bolt 0 is projected, it will assume the position shown in Fig. 8. In this position it functions as a bolt which can not be iimmied. as no beveled face is presen Furthermore, it functions as a guide and as a guard for the main latch bolt B, and as the secondary latch bolt is made of a hard steel, even sawing of the latch bolt can be prevented.

When the door has been locked as by rotation of the turnpiece 38, it is triple looked; that is, it is double locked by the two bolts being extended. and it is triple looked s the dog 11 will in this position enter one of the notches 21 and thus or, in other it inoperative, as it can not be reknob. Hence, if it is desired to unlock the door, it can be accomplished from the -inside by grasping the turnpiece l5 and rotating tumblers 40 and permit the bar 32 until the actuator assumes the position shown in Fig. 1, or it may be accomplished from the outside'by a person having 'the proper key. That is, insertion of the key will retract the the cylinder 89 to be it is rotated, it will transmit v the actuator through means of the lugs 42 and it. The revolution would be a halt revolution so as to bring the actuator back to the position shown in Fig. 1. Hence whether the actuator is rotated by the key mechanism or by the turnpiece ll it may be rotated by either member to assume either the position shown in rotated, and when rotary motion to be opened again by 8.

Fig. 1 'or that shown in Fig. 8. The actuator-8| .controls the position of the retractor plate c and the secondary latch bolt C and the dogging member I! at all times. actuator shown in Figs. 1 and 2 the actuator engages'the face lid of the retractor plate and thereby holds this plate in its innermost position. By rotating the bar 32 either by the turnpiece or the key mechanism the actuator ll will assume a position opposite from that shown in Fig. 1 or Fig. 2, or in other words, the'position shown in Fig. 3. In that or the retractor plate 0 will still engage the actustar, but the retractor plate 0 and the secondary latch bolt C will assume extended position, and it can not be returned from this position by rotation of the spindle, as the In the position of the spindle is dogged by position the face lia the lug l1. Hence before the door can be opened,

it is necessary to retract the secondary latch bolt by means of the actuator, and this can be retracted manually or it may be retracted by operation of the key actuated mechanism.

In my co-pending application heretofore referred to, two spindles were employed, an inner and an outer spindle, and while two latch bolts were employed only the outer spindle would be dogged when the two latch bolts assumed projected position. In this instance there is only one spindle, and this is dogged when both latch bolts are projected so that neither knob can be rotated. This is a feature which is an advantage in certain instances, as it prevents a person from locking the door from the inside and then attempting to go out and close the door thereafter. That is, with both bolts projected, it would be impossible to'shut the door as the secondary latch bolt will engage the edge 52 of the striker plate and prevent further closing of the door. Thus the person going out andattempting to lock the door would have to reverse the position of the turnpiece 35, or in other words retract the secondary latch bolt before going out and closing the door, and then it is only possible to lock the door from the outside. That can be accomplished by the insertion of a key and by that means rotating the actuator to assume the position shown in Fig. 3. Then the door is locked and can only person in possession of the proper key.

While certain features of my invent on have been more or less specifically described and illustrated, I wish it understood that changes may be resorted to within the scope of the appended claims, and that the materials and finish of the several parts may be such as the experience of the manufacturer or varying conditions of use may demand.

Having thus described and illustrated my invention, what I claim and desire to secure by Letters Patent is:

1. In a lock of the character described a tubular spindle having a rollback member formed thereon, a retractor plate having a main latch bolt secured thereto, said rollback member being engageable with the retractor plate to impart a retracting movement to the retractor plate and the main latch bolt when the spindle is rotated, a second retractor plate having a secondary latch bolt secured thereto, a rotatable member within the spindle controlling the position of the secondary latch bolt and its retractor plate, a dogging member carried by said second named retractor plate, said dogging member engaging and dogging the spindle against rotation when position of the last the secondary latch bolt is projected and assuming' an undogged position when the secondary latch bolt is retracted, and rotatable and independently operable spindle for rotating the rotatable member within the spindle to control the position of the secondary latch bolt and the dogging member.

2. In a lock of the character described, "a tubular spindle having a rollback member iormed thereon, a retractor plate having a main latch bolt secured thereto, said rollback member being engageable with the retractor plate to impart a retracting movement to the retractor plate and the main latch bolt when the spindle is rotated, a second retractor plate having a secondary latch bolt secured thereto, a rotatable member within the spindle controlling the position 01' the secondary latch bolt and its retractor plate, a dogging member carried by said second named retractor plate, said dogging member engaging and dogging the spindle against rotation when the secondary latch bolt is projected and assumto the rotatable member within the spindle to control the position of the secondary latch-bolt and the dogging member.

3. In a door look, a pair of latch bolts, a single spindle journaled in the lock and adapted to retract one of the latch bolts,-a rotatable member within the spindle controlling the position of the other latch bolt, and independently operable means at each end of the spindle controllin the position of the rotatable member and thereby the named latch bolt.

4. In a door lock, a main and a secondary latch bolt, a single spindle for retracting the main latch bolt, a rotatable member within the spindle controlling the position of the secondary latch bolt,

main or the secondary 6. In a door bolt,

latch bolt. lock, a main and a secondary latch a single spindle for retracting the main the secondary latch bolt to retracted position.

7. In a door look, a main and a secondary latchbolt, a single spindle for retracting the main latch bolt, an outer knob secured to the outer end of the spindle, an inner knob secured means at each end 01' the r on the inner end of the spindle, a rotatable member withinthe spindle controlling the position of the secondary latch bolt, means actuated by projection of the secondary latch bolt ior rendering both door knobs inoperative to retract either the main or the secondary latch bolt, and rotatable means operable irom either end oi the spindle for rendering both knobs operable to retract the main latch bolt and for simultaneously restoring the secondary latch bolt to retracted position.

8. In a door lock, a main and a secondary latch bolt, a single spindle for retracting the main latch bolt, an outer knob secured to the outer end of the spindle, an inner knob secured on the inner end or the spindle, a rotatable member within the spindle controlling the position of the secondary latch bolt, means actuated by projection of the secondary latch bolt ior rendering both door knobs inoperative to retract either the main or the secondary latch bolt, and rotatable means operable from one end of the spindle for rendering both knobs operable to retract the main latch bolt and for simultaneously restoring the secondary latch bolt to retracted position.

9. In a door lock, 8. main and a secondary latch bolt, a single spindle for retracting the main latch bolt, an outer knob secured to the outer end of the spindle, an inner knob secured on the inner end of the spindle, a rotatable member within the spindle controlling the position of the secondary latch bolt, a do ging member engageable with the spindle to render the spindle and both knobs inoperative to retract the main latch bolt, said dogging member being operable in unison with the secondary latch bolt and assuming an undogged position when the secondary latch bolt is retracted and a dogging position when saidlatch bolt is projected, and a manually operable rotatable member in the inner end of the spindle for retracting the secondary latch bolt and for simultaneously undosginz the spindle to permit retraction of the main latch bolt by either knob.

10. In a door lock, a main latch bolt having a bevelled outer face, a secondary latch bolt channel shaped in cross section and embracing the main latch bolt to cover the bevelled face of said main latch bolt when both latch bolts are projected, a retractor on the main latch bolt, a single spindle, a rollback member on said spindle engageable with the retractor to retract the main latch bolt, a retractor on the secondary latch bolt, a rotatable bar within the single spindle,

, a rollback member on said bar engageable with the. retractor on the secondary latch bolt to retract the same, spring means normally tending to prolect both latch bolts. and manually actuated means for imparting rotation to the rotatable IhIrtto control the position of the secondary latch 11. In a door lock, 9. main latch bolt having a bevelled outer race, a secondary latch bolt channel shaped in cross section and embracing the main latch bolt to cover the bevelled iace oi said main latch bolt when both latch bolts are projected, a retractor on the main latch bolt, a single spindle, a rollback member on said spindle engageable with the retractor to retract the main latch bolt, a retractor on the secondary latch bolt, a rotatable bar within the single spindle, a rollback member on said bar engageable with the retractor on the secondary latch bolt to retract the same, spring means normally tending to proiect both latch bolts, manually actuated means for imparting rotation to the rotatable bar to control the position of the secondary latch bolt, and a dogging member actuated by movement of the secondary latch bolt to render the single spindle either operative or inoperative.

12. In a door lock, a main latch bolt having a bevelled outer face, a secondary latch bolt channel shaped in cross section and embracing the main latch bolt to cover the bevelled face oi said main latch bolt when both latch bolts are projected, a retractor on the main latch bolt, single spindle, a rollback member on said spindle engageable with the retractor to retract'the main latch bolt, a retractor on the secondary latch bolt, a rotatable bar within the single spindle, a rollback member on said hi engageable with the retractor on the secondary latch bolt to retract the same, spring means normally tending to project both latch bolts, manually actuated means for imparting rotation to the rotatable bar to control the position of the secondary latch bolt, and a dog carried by the retractor of the secondary latch bolt, said dog engaging and dogging the single spindle against rotation when the secondary latch bolt is projected and undogging said spindle when the secondary latch bolt is retracted.

WALTER R. SCI-mAGE.

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