US897660A - Door lock and latch mechanism. - Google Patents

Description

v PATENTED SEPT. 1, 1908.

B. REVOIR. DOOR LOOK AND LATCH MECHANISM.

APPLICATION TILED MAY 28, 1906.

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PATENTED SEPT. 1-, 1908.-

B. REVOIR. DOOR LOCK AND LATCH MECHANISM.

APPLICATION FILED MAY 28, 1906.

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No. 897,660. PATENTED SEPT. 1, 1908. B. REVOIR.

DOOR LOCK AND LATCH MECHANISM.

APPLIOATION FILED MAY 2a, 1906.

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closed position, and provided. with a spring UNITED STATES PATENT OFFTOE.

BATTESE REVOIR, OF SYRACUSE, NEW YORK,

ASSIGNOR OF ONE-THIRD TO RAY B. SMITH AND ONE-THIRD TO E. GILBERT LATHROP, OF SYRACUSE, NEW YORK.

DOOR LOCK AND LATCH MECHANISM.

Application filed May 28, 1906.

T 0 all whom it may concern:

Be it known that I, BATTESE RnvoIR, of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Door Lock and Latch Mechanism, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to the class of doorlatch and lock mechanisms wherein a latch bolt and locking-bolt are supported in a case fastened to the door and are adapted to engage a catch-plate fastened to the door-cas ing, said latch-bolt being retracted from the catch-plate by means of the usual rotatable knob-spindle in the operation of opening the door, and having a beveled outer end portion whereby it is forced back by contact with the catch-plate when the door is swung to its for pressing the same forward so as to cause the said bolt to enter the catch-plate; and the said locking-bolt being moved into engagement with the catch-plate and retracted therefrom by means of suitable key-operated devices, which devices also actuate one or more tumblers arranged to engage the said locking-bolt in both protracted and retracted positions.

Referring to the said drawings, Figure 1 is a fragmentary view of a door, in longitudinal section, and provided with my improved lock and latch-mechanism, and showing the two bolts in protracted position Fig. 2 is also a fragmentary view, partly in section and showing the usual removable plate of the lock-case broken away, the locking-bolt in this instance being retracted; Fig. 3 is an interior side view of the case, and shows the two bolts in retracted position, and illustrating by dotted lines the movements of the parts which retract the latch-bolt; Fig. 4 is also an interior view of the case, showing the bolts in protracted or looking positions; Fig. 5 is a vertical section of the case applied to a door, and taken on a line through axes of the knob-spindle, detent-operating spindle and key-receivingcylinder; Fig. 6 is an interior view of the upper portion of the case and showing in detail the collar and lever which retract the latch-bolt, said collar being represented in the position it assumes when the knob-spindle is rotated forward; Fig. 7 is a detail view showing more clearly the tumbler l Specification of Letters Patent.

Patented Sept. 1, 1908.

Serial No. 319,079.

which engages the locking-bolt, the tumbler being lifted by the key-operated device; Fig. 8 is a detail vertical section taken on the line X-X in Fig. 5; Fig. 9 is a detail view showing the detent or catchwhich engages both bolts when they are in looking position; Fig. 10 is a detail plan view of the latch-bolt having its rear end portion broken away to show its slot and stud-connection with the actuating lever; and, Fig. 11 is a detail longitudinal sectional view of the key-receiving cylinder showing the three-part rotatable barrel.

Like numerals of reference indicate like parts.

1- denotes the lock-case which is of the usual form and is secured in a mortise in the edge of the door A in the well known manner.

2 denotes the usual spindle extending through the case and provided with the knobs -3-. Said spindle is square in cross-section and passes through a correspondingly shaped aperture 4 rovided in a collar 8. This collar is journa ed at its opposite ends in the sidewalls of the case as indicated at 6-, and is formed with an upwardly projecting lug 7 and a similar downwardly projecting lug 8, which lugs serve to actuate a lever 9 fulcrurned on a projection 10 on the top of the case. This lever 9 is formed with a segmental portion conforming to the collar and partly embraces said roll-back when the lever is in its normal position as clearly shown in Figs. 2 and 4 of the drawings. The said lever is disposed back of the collar and has its lower end extending below the same, and the upper end of the lever is formed with a forward extension 11 adapted to bear against the top of the case when the lever is in its normal position. On the underside of this extension bears the rear end of the main spring 12 having its forward end bearing on the case as indicated at 13, the intermediate portion of whichspring bears upon a lug -14 projecting from one of the sidewalls of the case. This spring 12 acts in opposition to the rotation of the knobspindle and thus moves the lever, collar and spindle to their normal positions when the knob is released by the operator.

The lever 9 is formed with a shoulder 15 adapted to be engaged by the aforesaid lug 7 on the collar, and the lower shown in Figs. 3 and 6 of the drawings.

end of said lever is adapted to be engaged by the other lug 8 thereon as more clearly On the lower end of the lever is formed a stud ,1 6 which enters a longitudinal slot 1 7 in the rear end portion of the latch-bolt 18- and normally engages the rear end of said slot, the forward end of which bolt is beveled as usual to engage an ordinary catchplate secured to the door-casing, as indicated y dotted lines in Fig. 1 of the drawings.-

Said latch-bolt extends through the usual aperture 1'8 in the case and is held nor- .mally in extended position by means of a spiral-spring 19- surrounding a ost or pin 20 formed on or fastened to t e case. 1 he end portions of said spring are straightened to form arms 2122, the arm 2 1 being fastened to a stud or pin 23 on the case, and the other arm bearing on the back of a lug 2lprojecting from the side of the latch-bolt. I prefer to provide each side of the said latch-bolt with one of these lugs, as shown in Fig. 10 of the drawings, whereby the said bolt may be reversed so as to adapt the lock to either side of a door.

When the aforesaid knob-spindle 2 is rotated rearwardly, the lug 7 of the collar bears on the shoulder 15 of the lever, whereby the said lever is actuated and its stud l6 caused to retract the latch-bolt as shown in Fig. 3 of the drawings. When the operator releases the knob, the spindle 2, collar and lever are moved to their normal positions by the aforesaid spring -12, whereby the spiral-spring 19- is allowed to move the latch-bolt to its protracted or normal position as represented by dotted lines in Fig. 3 of the drawings. The rotation of the said spindle from its normal position forwardly causes the lug 8 of the roll-back to bear against the lower end of the lever 9-, whereby the lever is caused to retj'lact the latch-bolt in the manner aforesai It will be seen that by the described slot and stud-connection between the lever and latch-bolt, the latter is permitted to be moved to its retracted position entirely inde pendent of its actuating parts, and thus when the said bolt is brought into contact with the catch-plate on the door-casing, it is free from the tension of the stiff spring -12-.

Therefore, it is obvious that very little re sistance is offered to said bolt when the same is crowded back by the catch-plate, inasmuch as a very light spring 19 may be employed for moving it to its protracted position for engaging the said catch-plate. This is one of the most important features of my invention.

25 denotes the locking-bolt which extends through the usual aperture -26 in the case 1, and slides between suitable guides 2727 on one of the side-Walls of the case, which guides consist preferably of lugs cast on the case as shown in Figs. 3 and 4 of the drawings. It is obvious that the forward end of said locking-bolt may engage the aforesaid catch-plate on the door-casing, or a special plate may be provided. The said locking-bolt is formed on its upper edge, near its rear end, with a lug 28- adapted to engage a lug -29 projecting from a tumbler 30. This tumbler consists preferably of an elongated plate'disposed horizontally and parallel with the locking-bolt and pivoted at its forward end to the case as indicated at 31. The lug 29 on said tumbler normally rests on the top of the locking-bolt and is ressed thereon by a spring 32. When t e lockingbolt is in retracted position, the lug 29 engages the front of the lug 28 as shown in Fig. 3 of the drawings, and when the said bolt is in protracted position, the lug 29 engages the back of the lug 28 as shown in Fig. 4 of the drawings. The lug 29 being in the path of the lug 28 obviously prevents the locking-bolt from being retracted, excepting through the actuation of specially constructed and arranged key-operated devices required for moving the tumbler, which devices will be hereinafter described.

The lower edge of the locking-bolt is cut out as shown at 33 and provided at said cut-out portion with a notch 34, and the lower edge of the tumbler 30 is curved slightly upward and extends across the cutout portion of the locking-bolt as shown in Figs. 3. 4. 7 and 8 of the drawings, for the purpose shortly explained.

The key-operated devices consist preferably of a cylinder 35 extending. through openings 36-36 in the side-walls of the case and provided with a longitudinal rib 37 engaging notches 3838 in the ment by the usual escutcheon-plates 39 I 39, or in any other suitable and convenient manner. In the said cylinder is disposed a barrel -40- composed of three independently rotatable sections aabwhich may be sustained longitudinally therein by any suitable means. The end-sections aa of the said barrel are each provided with a longitudinal slot 41 for the reception of a flat key B intended to be of special form, and the central section b is provided with recesses 4242 adapted to receive correspondingly shaped projections on the end of the key as shown in Fig. 5 of the drawings. This central section b is also provided with a rigid tongue 43 projecting radially therefrom and adapted to be swung back and forth in a transverse slot 44 in the cylinder 5-. In order to allow the said cylinder, containing the barrel, to be inserted through either side of the case, I provide the side-walls with slots -4646 extending radially from the openings 3636 to allow the aforesaid tongue 43 to enter the case. After the cylinder has been placed in position, I insert a removable pin or screw -47 in the slots -4(546 as shown in Figs. 3, 4 and 7 of the drawings. This pin or screw serves as a guard to prevent the tongue from engaging either slot when the said tongue is swung rearward in the operation of retracting the locking bolt as will be shortly described. The said pin or screw 47 and a pin 4S form stops to limit the movements of the tongue.

IVhen the locking-bolt 25 is in retracted position, the tongue 43 is adj acent to or in contact with the stop 47 and also bears against the lower edge of the tumbler 30 as shown in Fig. 3 of the drawings.

By inserting the key B into the slot of either end-section a of the barrel 40 and turning said section either forward or rearward, the projections on the key are allowed to engage the correspondingly shaped recesses 4242- in the end of the central barrel-section b. The operator then turns the key forward, whereby the tongue is swung in corresponding direction and lifts the free end of the tumbler 30 to carry its lug 29 out of the path of the lug 28 on the locking-bolt -25. This action of the tongue is permitted by reason of the locking-bolt being cut out as shown at 33. By a continued movement of the key, the said tongue is caused to engage the aforesaid notch -34 in the lower edge of said locking-bolt, whereby the said bolt is moved forward to engage the usual catchplate on the door-casing. The said tongue is designed to disengage the notch -34 when the bolt has reached its protracted position, whereupon the tumbler is allowed to drop to cause its lug 29 to engage the back of the lug 28 on the locking-bolt as shown in Fig. 4 of the drawings. This engagement of the two lugs positively holds the bolt in its extended position.

It will be seen that a key may be inserted into one end of the barrel while another key is in the other end of the same, and thus the operation of either key permitted. It is obvious, that by now turning a key rearward, thetongue -43- will lift the tumbler to move the lug 2 9- out of engagement with the lug 28 to permit said tongue to retract the locking-bolt. The said lockingbolt is provided with a rigid upwardly eX- tending 'bar 49- constituting a catch which is adapted to engage the back of the aforesaid lug 24 on the latch-bolt 8 when the two bolts are in protracted position as shown in Fig. 4 of the drawings. By this engagement of the bar and lug, it will be seen that the latch-bolt is firmly locked to the locking-bolt, thereby producing a duplex lock for the door.

50-- denotes a keeper consisting of an arm which is formed with a hub 51 which is journaled in openings -5252- in the side-walls of the case and is provided with a square longitudinal bore 53 receiving a rotatable spindle 54 formed correspondingly in cross-section. This spindle projects only at the inner face of the door and is provided with a suitable thumb-piece -55- for turning the same, and it is retained in its position by a loose-collar 56- adapted to be fastened to the escutcheonplate 39 as shown in Fig. 5 of the drawings. The aforesaid keeper 50 is normally in upright position as shown in Figs. 2 and 3 of the drawings. WVhen the two bolts -18 and 2 5 are in protracted position, the spindle may be turned forward to throw the free end of the keeper -50 into the position shown by full lines in Fig. 4 of the drawings, in which position it is adapted to engage the aforesaid bar 49, and thus prevents the locking-bolt from being retracted by the use of a key. This keeper serves as a night-catch and being concealed and operative only from the inner side of the door, it guards against malicious tampering with the locking-bolt at the outer side of the door. The said hub 51 of the keeper is provided with two fiat faces 57-57 against which a spring *58'- is adapted to bear when the keeper is in its respective positions as shown in Figs. 3 and 4 of the drawings.

What I claim is 1. In a door-lock and latch-mechanism,

the combination with a locking-bolt and its actuating means, of a latch-bolt, a spring for protracting the latch-bolt, a rotatable knobspindle, means actuated by the knob-spindle for retracting the latch-bolt, a spring for moving the knob spindle and retracting means to their normal positions, a bar car ried on the locking-bolt and serving as a catch for locking the latch-bolt in protracted position, a pivotally supported keeper operative for engaging the said bar, and means disposed on the inner face of the door for actuating said keeper as set forth.

2. In a door-lock and latch-mechanism, the combination of a latch-bolt, means for retracting the said bolt, and a spring for forcing the same to protracted position, a locking-bolt, means for actuating said locking-bolt, a vertical bar carried on the latter bolt and serving as a catch adapted to engage the latch-bolt when both bolts are in protracted position, a pivotally supported keeper consisting of an arm normally disposed parallel with the said bar and adapted llii to be swung to horizontal position to engage 3. In a door-lock and latch mechanism,

the combination of a case, a latch-bolt, a spring holding said latch-bolt normally in protracted position, and a knob-spindle for retracting the same, a locking-bolt, a tumbler pivoted at one end of the case, a spring pressing the free end of said tumbler normally into engagement with the inner end portion of the locking-bolt, key-operated means engaging the free end of the tumbler to move the same out of engagement with the lockingbolt to permit the said key-operated means to actuate the locking-bolt, a vertical bar carried rigidly on the locking-bolt and adapted to engage the latch-bolt when both bolts are in protracted position, and thereby lock the latch-bolt with the locking-bolt, a second rotatable spindle extending through one side of the case and provided with a thumb-piece for turning the same, and a keeper provided with a hub supported revolubly and inclependently of the latter spindle and operated thereby, said keeper being adapted to engage the aforesaid bar when the bolts are in protracted positions as and for the purpose set forth 4. In a door-lock, the combination of a case, a locking-bolt provided. on its, up er edge with a lug and in its lower edge with a notch, a tumbler consisting of a plate disposed parallel with the locking-bolt and pivoted at one end to the case and provided at its free end with a lug normally resting on the top of the locking-bolt and in the path of the a sectional barrel journaled in said cylinder and provided in its opposite ends with keyslots, and a tongue projecting radially from the barrel and movable in the transverse slot, said tongue being adapted to bear against the lower edge of the tumbler to lift its lug out of the path of the lug on the locking-bolt and also adapted to engage the notch in said locking-bolt to actuate the bolt as set forth.

5. In a door-lock, the combination of a case, a locking-bolt, a tumbler pivoted at one end to the case and having its free end portion normally engaging said locking-bolt, a cylinder held stationary in the case and provided in its central portion with a transverse slot, a barrel supported in said cylinder and composed of three independently rotatable sections, the end barrelsections each being provided with a longitudinal key-slot, and the ends of the central section provided with recesses for the reception of the end of a key, and a tongue secured rigidly to said central barrel-section and projecting through the transverseslot of the cylinder, said tongue being adapted to primarily engage the free end of the tumbler to liftthe latter out of engagement with the locking-bolt, and second arilyengage the locking-bolt to move the same to protracted and retracted positions as set forth and shown.

BATTESE REVOIR. [L. s.']

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