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Publication numberUS1112316 A
Publication typeGrant
Publication dateSep 29, 1914
Filing dateMay 8, 1909
Priority dateMay 8, 1909
Publication numberUS 1112316 A, US 1112316A, US-A-1112316, US1112316 A, US1112316A
InventorsLeonard Percival
Original AssigneeAlarm Lock Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1112316 A
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Description  (OCR text may contain errors)




1 1 1 ,3 1 6, Patented Sept. 29, 1914.

Wilma/ans v L I k 55% MW 1 I I athwmnp THE NoieR/s PETERS 00.. PHOTD-LITHLL, WASHINGTON. 1.\ FY



APPLICATION FILED MAY 8, 1909. 1 1 1 2 3 1 6 Patented Sept. 29, 1914.


18 attoznaqo L. PEROIVAL.



.1 1 1 2 3 1 6 Patented Sept. 29,1914.






To all whom it may concern:

. Be it known that I, LEONARD PEROIVAL, a citizen of the United States, residing at Tacoma, in the county of Pierce and State of Washington, have invented certain new and useful Improvements in Alarm-Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art towhich it appertains to make and use the same.

This invention relates to improvements in door looks or latches, and particularly to latches which may be made operable from one or both sides of the door as desired or may be locked against operation from either side of the door, and which are also provided with a safety alarm mechanism.

The object in view is the arrangement in a lock, or latch, of means for permitting the lock to be operated or locked against Operation from either side of the door.

Another object of the invention is the arrangement of means for permitting the operation of the lock and the locking of the lock against operation, and at the same time setting the lock for sounding an alarm in case any attempt is made to operate the lock.

A further object of the invention is the arrangement of a latch or lock having an auxiliary lock of the tumbler type associated therewith, whereby the bolt of the lock or latch may be positively locked against movement.

With these and other objects in view the invention comprises certain "novel constructions, combinations and arrangements of parts as will behereinafter more fully de" scribed and claimed.

In the accompanying drawings: Figure 1 is a vertical section through an embodiment lever therefor.

' of the invention.

Fig. 2 is a detail perspective view of a bolt operating sleeve. Fig. 3 is a detail fragmentary perspective view illustrating the formation of a connection for the interior of one of the knob shafts. Fig. 4 is an interior view of the lockremoved. Fig. 5 is a plan view of an alarm lever. Fig. 6 isa section through Fig. 1, approximately on line 66. Fig. 7 is a detail fragmentary view of the inner end of the bolt and an auxiliary locking Fig. 8 is a view similar to Fig. 7, showing the locking lever holding the bolt positively-locked in an outer posi- Specification. of Letters Patent.

Application filed May 8, 1909.

Patented Sept. 29, 1914. Serial No. 494,791.

tion. Fig. 9 is a detail of construction described below.

In constructing a lock or latch embodying the invention the same is made so as to be operable by means of the knob on each side of the door, or by means of one knob only, or it may be so adjusted that it can be operated from either side of the door. Operating in conjunction with the latch mechanism is a safety alarm mechanism for indicating any unauthorized operation of the latch and attracting attention thereto. In addition means are provided for positively locking the bolt of the latch in an Outer or locked position and against movement from either side by means of the knobs.

In the accompanying drawings one embodiment of the invention is disclosed in which 1 indicates a door of any desired structure to which the lock is applied. Suitable plates 2 and 3 are provided that protect the interior mechanism and give a finished appearance to the lock. Plate 3 is lesigned to be located on the inside of the door and havesecured thereto in any de-- sired manner a base plate 4. The base 4 is provided with openings 5 and 6 for receiving. lugs extending from a suitable cap 7 which may be of any desired structure and arranged to inclose part of the operating mechanism of the lock. Base 4 also carries a latch guiding member 8 of any desired kind for guiding latch 9 in its reciprocatory movement. Latch 9 is adapted to pass through a turned upportion 10 of plate 3 which preferably extends for the full width of the door. Latch 9 is formed with an opening 11 offlany desired or usual construction for accommodating sleeve 12 which carries cars 13 and 14. Ears l3 and 1a are adapted to engage projections or ears l5 and 16 of latch 9 for moving latch 9 inward against the action of spring 17 which engages the inner end of the latch and is held in place by engaging bolts 18 and 19.

Sleeve 12 is formed with a central aperture for accommodating a' connecting shaft 20. Sleeve 12 is also provided with a plurality of apertures 2l21 and 22-22 for permitting the passage therethrough of a pin which is arranged to pass entirely through bolt 20 and project beyond the same for forming a lug on each side of the bolt. Of course if desire'd two independent lugs could be provided instead of a pin passing through the bolt and projecting beyond the same. The ends of pin 23 are arranged to pass through slots or openings 21-21 and into notched out portions 24 and 25 and also through shank 31. hen it is desired, and as hereinafter fully described, the ends of pin 23 may be removed from notches 24 and 25 and passed through slots 22-22 into notches 26 and 27. Sleeve 12 is positioned so that the arms 15 and 16 will engage base plate 4 and are held continuously in engagement therewith by a spring 29 which surrounds shaft 20 and impinges against a stop 30 rigidly secured thereto. Sleeve 12 projects through base plate 4 and plate 3 and into a tubular shank 31 of knob 32. Shaft 20 also projects through plates 3 and 4 into knob 32 and is secured to knob 32 by pin 23 engaging shank 31. Sleeve 12 is arranged toslidingly fit shank 31 so that whenever desired knob 32 may be pulled in a direction away from door 1 which will move shaft 20 against the action of spring 29 and cause the ends .of pin 23 to move through either slots 2121 or 2222 as the case may be for engaging either notches 24 and 25 or 26 and 27.

Shaft 20 extends entirely through the door and plates 2 and 3 and is provided with a pin 33 which passes through shaft 20 and projects beyond the same for forming lugs for engaging notches 34 and 35 in a tubular member 36 which is secured in shaft 33 of knob 37, preferably by being threaded therein. As spring 29 acts against stop 30 and sleeve 12 the ends of pin 33 are continuously kept in engagement with notches 34 and 35, unless knob 32 has been pulled inward for disengaging the same. Knob 37 is designed to be on the outside and knob 32 on the inside so that when it is desired to arrange the look so that anyone from the outside can not operate the bolt, knob 32 is moved inward which will move shaft 20 in ward and pin 33 out of engagement with notches 34 and 35. At the same time that pin 33 is moved out of notches 34 and 35, pin 23 will be raised from the bottom of slots 21-21. Knob 32 is then given a rotary movement until the ends of the pin come opposite slots 2222. Knob 32 is then forced toward the door which will cause pin 23 to engage the bottom of slots 22-22. This will support or hold pin 33 out of engagement with notches 34 and 35 against the action of spring 29. This will permit the latch 9 to be operated by knob 32, but knob 37 will be disconnected therefrom. Knob 37, however, will be permitted a partial rotation until projection 39 engages an alarm lever 40 which is raised thereby for making contact with a contact member 41 which is electrically connected to an alarm bell 42. Bell 42 has electrical connection with the frame and lever 40, and when the latter contacts with member 41 the circuit is completed and the alarm is sounded. Lever 40 is provided with a partially encircling yoke member 43 against which projection 39 strikes and which is raised by the projection 39. Lever 40 is guided in its movement by pin 44 and is normally held in contact with the extension of shank 38 to which is secured projection 39.

By this construction and arrangement whenever it is desired to use the latch as an ordinary latch the shaft 20 is arranged as shown in Fig. 1 wherein pin 33 is in engagement with notches 34 and in member 36. This will put knob 37 in communication with shaft 20 and as pin 23 passes through shank 31 knob 32 in engagement therewith. look so that knob 37 will not operate latch 9, knob 32 is pulled inward for disengaging pin 33 from notches 34 and 35. After knob 32 has been pulled in until pin 23 can pass over the end of sleeve 12 the knob is turned;

until pin 23 is opposite slots 2222. Pin 23 is then forced into slots 22-22 and into engagement with notches 26 and 27. The notches 26 and 27 are of advantage in preventing accidentally pulling out pin 23 from slots 2222 and again connecting knob 37 with the latch 9. When the lock has been thus set the latch may be easily operated from the inside,'but nothing but the alarm can be operated from the outside.

In order to provide means for an authorized person to operate latch 9 when knob 37 has been disconnected therefrom, an auxiliary lock 46 is provided which is of the tumbler type, as for instance an ordinary Yale lock. Secured to the plugs or movable members of the lock 46 is a lever 47 which is designed to engage pin 48 which passes through opening 49 and which is rigidly secured to a pivotally mounted lever 50. Lever 50 is pivotally mounted upon pin 44 and is provided with lugs or extensions 51 and 52 which are designed to engage lug or extension 15 of latch 9. When knob 37 has been disconnected from latch 9 and an authorized person desires to enter from the outside, he may rotate lever 47 after having inserted a key into lock 46. The lever 47 may be rotated back and forth or entirely around as desired as long as the key is in the lock so that when it is desired to move latch 9 lever 47 is turned, for instance to the position shown in Fig. 7, which will cause lug or projection 51 to engage lug 15. A further movement of the key, as will be evil-1 dent, will cause the withdrawal or inward movement of latch 9. Under ordinary circumstances the key is removed with lever 50 in the position shown in Fig. 7, which will permit the free movement of latch 9 unden hen it is desired to set the the action of the respective knobs. If it should be desired to lock latch 9 against movement, levers 47 and 50 are turned over to the position shown in Fig. 8, wherein lever 47 engages the opposite side of pin 18 to that shown in Fig. 7, and consequently holds lug52 against lug 15 of bolt 9. If the key is removed with the levers 4:7 and 50 in the position shown in Fig. 8, latch 9 will be locked positively against movement, except by a person inserting a key into lock 46 and turning the same. The use of lock 46 is of advantage in being able to positively lock same may be reversed if desired. The spring 17 may be placed above the latch 9 and the mechanism above latch 9 moved below. This is of considerable advantage in that the lock may be used readily as a right and left look.

What I claim is:

In an alarm latch mechanism, a latch, a shaft, and connections for manipulating said latch from the shaft, outer and inner knobs having shanks for rotating the shaft, an alarm, means including a member having a yoke portion bearing against the shank of one of the knobs and actuated by the rotation of the outer knob for sounding the alarm, the other knob and the shaft being capable of disengagement from the first mentioned knob, and means for locking the shaft and one of the knobs against rotation.

In testimony whereof I alfix my signature in presence of two witnesses.




'Oople: of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3280279 *Oct 19, 1965Oct 18, 1966Walker Jr Richard WAlarm signal device for openable closures
US3284593 *Apr 28, 1965Nov 8, 1966Gen Alarm CorpAlarm lock for doors having a key operated magnetic switch control
US3939315 *Jun 10, 1974Feb 17, 1976Schlage Lock CompanyElectric switch contained within lock frame and actuated by movement of locking bar
US4818971 *Feb 25, 1988Apr 4, 1989Patrick Robert HFalse alarm resistant burglar alarm system
U.S. Classification200/61.64
Cooperative ClassificationE05B45/06