US1191538A - Rim-latch. - Google Patents

Description

R. SCHOELL.

RIM LATCH.

APPLICATION man APR.22. 191s.

1,191,538, Patented July18;1'916.

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REINHOLD SCHOELL, OF STANFORD, CONNECTICUT, ASSIGNOR T THE YALE & TOWNE MANUFACTURING COMPANY, OF STAIVIFORD, CONNECTICUT.

RIM-LATCH.

Specification of Letters Patent.

Patented July 18, 1916.

citizen of the United States, and a resident of Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Rim- Latches; and I do hereby declare the following to be a full, clear, and exact description of the invention, s uch as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in rim latches and is an improvement on the construction disclosed in U. S. Patent No. 918,492 granted to I). F. Augenbraun, April 20th, 1909.

It consists in means for holding the double throw latch in its single throw position when the door is open, so that when the door is closed and the latch impinges upon the strike plate, the latch will be forced backward, which movement will aumatically release the holding` means so that when the door is closed the bolt will automatically be thrown into its double throw position. And in addition to this feature, l".l

provide means when the bolt is thus in its double throw position for dead locking. it. This dead-locking feature, while desirable, is not essential to my invention.

It further consists in details ofconstruction as will be more fully explained'and pointed out in the claims'.

In the accompanying drawings, Figure 1 is a view in elevation of the lock, the cover plate being removed and shown at the side, and the bolt shown in its normal or single throw position. Fig. 2 is a similar View showing the bolt retracted. Fig. 8 .is a similar View showing the bolt in its double throw or fully projected position. Figs. 4 and 5 are views of the carrying frame and tumbler. Figs. 6 and 7 are views of the bolt, and Fig. 8 is a View in section through the carrying frame, bolt shank and tumbler.

9 represents the bolt head and 10 the shank thereof, he head being secured to the shank so as' to permit it to be Vturned to adapt it to doors opening either inwardly or outwardly.

The shank .is preferably shaped as shown in Figs. 6 and 7, and is provided with the shoulder 11 having a hole 12, through which the guide rod 13 secured to the carryingA frame 14 passes.

The guide rod 13 is secured in the projectmg ends 15 of the carrying frame 14, and the latter is provided at its rear end with a shoulder 16, adapted to be engaged by the end of arm 17 on the hub 18 of knob spindle 19, for holding the carrying frame in its rearward position.

Pivoted to the carrying frame and intermediate the same and the shank 10 of the bolt, is the spring pressed tumbler 20, the free end of which terminates adjacent the shoulder 16, as shown in Fig. 4, and in a position to be engaged and lifted by the arm 17 on the hub 18, when the latter is turned in a direction to shift the bolt from its double throw position, to its single throw or normal position, and when the single throw position of the bolt has been reached, the rear free end of the tumbler falls in front of arm 17 and positively locks the same against movement in a direction to project the.bolt, it being free however to turn in a direction to move the bolt in its retracted position. The shank of the bolt is provided with the'lug 22, the front face of which is engaged by the arm 23 on the hub 18 for shifting the bolt rearwardly independently of the carrying frame, and its rear curved face is engaged by the arm 17 on the hub 18,y for deadlocking the bolt in its fully projected position as shown in Fig. 3. i The carrying frame has a longitudinal movement in the lock case andthe bolt shank has a longitudinal movement on the guide rod of the carrying frame, and the latter is yieldingly held with its shoulder 11 in rcontact with the front end 15 of the carrying frame by the spring 24 which bears atl its ends respectively against the rear end 15 of the carrying frame and the shoulder 11 on the bolt shank. wWhen the bolt is in its single throw position, vit may be retracted in order to close and latch the door by turningl the knob or key mechanism and when released it will move; to its'single throw position and will notbedead-locked. If, however, it be in its single throw position and thedoor be closed, the bolt being pushed in by the strike plate, it will under such conditions jump to its double throw position4 and be deadlocked against pressure exerted against the head of the bolt by the end of arm 17 bearing against the rear face of lug 22 of the bolt shank, the arm 17 being limited in its movement'by the engagement of the arm 23 on the knob shank with the post 24 fixed to the lock case.

The hub 18 is provided with a spring 25 which tends to rotate it to the right, or in a direction to project the bolt, and it operates to project the bolt after the latter has been forced inwardly by contact with the strike plate or keeper. The bolt shank is provided with a laterally projecting pin 26 which rests under and forms a stop which limits the movement of the free end of the tumbler toward the hub and also operates when the bolt moves rearwardly independently of the carrying frame to lift the free end of the tumbler so as to liberate the end of arm 17.

In the operation of the latch if the bolt be fully projected as in Fig. 3 and the knob turned the arm 17 will be moved away from the shoulder 22 on the bolt thus removing the dead lock. As it continues its movement it will contact with shoulder 16 and thus move the carrying frame 14 and the bolt 9 rearwardly until the arm 23 has moved up into contact with the front face of lug 22 on the shank of the bolt. When this position of the arm 23 has been reached, the arm 17 will have passed under the free end of the tumbler. and into contact with the shoulder 1G on the carrying frame thus locking the bolt against outward movement. Vhen the bolt is fully projected its shoulder 11 bears against the front end of the carrying frame and this contact is maintained during the movement of the bolt from its fully projected or double throw position to its normal or partly projected position, due to the fact that the bolt is pulled back to this position by the carrying frame. After the bolt has been retracted to normal or single throw position the free end of the tumbler rests in front of the end of arm 17, thus blocking a reverse turning movement of the knob but leaving it free to be turned to fully retract the bolt, the hub in the meanwhile being under the tension of its spring 25 which tends tothrow it in a direction to project the bolt. The latter can of course be fully retracted by a continued rotation of the hub 18 which causes the arm 23 to bear against the lug 22 as shown in Fig. 2. If after the bolt has been retracted to release it from its keeper, and the knob released the spring 241 moves the bolt to its normal or single throw position, further outward movement being blocked by the engagement of the arm 17 with the free end of the tumbler 20. If now the bolt be moved inwardly by contact with the strike plate or keeper, the carrying frame remains stationary so that the rearward movement of the bolt compresses the spring 21 as shown in Fig. 2, and the knob is prevented from turning under the action of its spring by contact of the arm 17 with the tumbler. The shoulder 22 on the bolt in its movement from the arm 23 to the arm 17 lifts the tumbler by means of the pin 26 thus freeing the arm 17, so that when the bolt is released the end of arm 17 passes under the tumbler thus leaving the springs 24 and 25 free to throw the bolt to its double throw position. The first part of the movement is accomplished by the spring 24, which moves the bolt forward on the carrying frame, and the secondv movement is yby the spring 25, which rotates the hub and carries the arm 17 against the lug 22 on the bolt, thus moving the bolt and carrying frame forwardly, and when in this position the bolt is deadlocked by the arm 17 contacting with the rear face of lug 22.

From the foregoing it will be seen that the bolt may be partlyprojected from the lock case, or be projected still farther into its double throw or dead locked position. When the bolt is in its normal or single throw positio-n the carrying frame rests adjacent to the rear end of the lock case and when double thrown the frame is moved forwardly toward the front of the lock.

The hub 18 of the knob spindle 19 is provided with a projection 21 adapted to be engaged by projections from a hub (not shown) actuated by key mechanism, so that the bolt may be operated from the inside by a knob and from the outside by a key.

It is evident that many slight changes might be resorted to in the relative arrangement of parts shown and described without departing from the spirit and scope of my invention. Hence I would have it understood that I do not wish to confine myself to the exact construction and arrangement of parts shown and described, but,- Having fully' described my invention what I claim as new and desire to secure by Letters-Patent, is:

- 1. In a lock, the combination of a double throw bolt, means for holding thebolt in the semi-projected position when the door is open, means for releasing the bolt when the door is closed, and a spring actuated hub for automatically projecting said bolt into its double throw position when the door is closed.

2. In a lock, the combination of a double throw bolt, a carrying frame connected with the bolt shank and having a movement independent of the latter, and a spring actuated hub having means for moving the carrying frame and the bolt rearwardly and for moving the bolt rearwardly independently of the carrying frame, and also for throwing said bolt to its fully projected position.

3. In a lock, the combination of a double throw bolt, a carrying frame connected with the bolt shank and having a movement independent of the latter and a spring actuated hub having means for retracting the bolt and moving the carrying frame rearwardly for projecting the bolt from its fully retracted to its double throw position, and for deadlocking the bolt in its double throw position.

4L. In a lock, the combination of a double throw bolt and spring actuated hub having means when the door is closed for automatically moving the bolt to its double throw position and for deadlocking the bolt when so projected.

5. In a lock, the combination of a carrying l frame having a guide rod, a double throw bolt the shank of which is mounted to slide on said rod, a spring encircling the rod and bearing against the rear end of the carrying frame and the bolt shank and a spring actuated hub having an arm to engage the bolt shank and an arm to engage the carrying frame, the construction being such that when the bolt is forced inwardly by turning the knob or the key the carrying frame and bolt will move rearwardly together during the first part of said movement and the bolt move rearwardly independently of said frame during the remainder of said movement, and when released from itsl fully re- Copies of this patent may be obtained for tracted position it will be projected by the spring on the carrying frame to the single or normal throw only.

6. In a lock, the combination of a carrying frame havingv a tumbler and a guide rod having a shoulder, a double throw bolt connected with the guide rod and provided with a shoulder, a spring on the guide rod tending to force .the bolt outwardly, a tumbler pivoted to the carrying frame, a lug on the bolt for elevating the tumbler when the. bolt is moved rearwardly on the frame, anda spring actuated hub having an arm to engage the lug on the frame for moving the parts rearwardly and to be engaged by the tumbler for locking the bolt in its first throw or normal position and also adapted to rest in rear of the lug on the bolt when the latter is fully projected and deadlock the same.

n In testimony whereof, I have signed this specification in the presence of two subscribing witnesses. y

REINHOLD SCHOELL. Witnesses:

WM. S. BALKHAM, CHARLES A. BERRY.

five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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