US1596425A

US1596425A - Alarm apparatus

Info

Publication number: US1596425A
Application number: US467395A
Authority: US
Inventors: David L Gordon
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-05-06
Filing date: 1921-05-06
Publication date: 1926-08-17
Anticipated expiration: 1943-08-17

Description

Aug. 17 1926. 1,596,425

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D. L. GORDON ALARM APPARATUS Filed May e. 1921 2 sheets-sheet 2 iINVENTOR ATTORNEY Patented Aug. 17, 1926.

`UNITED STATES DAVID L. GORDON, 0F NEW .YORK, N. Y.

ALARM APPARATUS.

Application led May 6, 1921, Serial No. 467,395.

This invention relates to alarm apparatus and with regard t-o its more specific features to electric circuit closures adapted tor use on swinging doors, windows and the lilre.

It is an object of the invention to provide a device wherein a signal will be given when a closed door is forced away from its casing in an edgewise direction. y

It is another object ot the invention t provide such a device which is undisturbed by swinging opening and closing movement of the door.

Another object of invention is to provide an electric alarm having terminals adjustable to be moved into contact by relative edgewise separation of predetermined. slight extent between the door and the casing.

Another object ot the invention is to provide an alarm which will sound continuously when once started until reset to normalv iroperative condition from the inside of the compartment.

Another object of the invention is to provide alarm apparatus which is simple and reliable and which may remain permanently set irrespective of ordinary use of the door.

A further object of the invention is to provide a device capable of locking a door against edgewise movement and adapted to permit pivotal movement ot the same.

Other objects will be in part obvious and in part pointed out hereinafter in connection with ther following description ot the accompanying drawings. which illustrate a preferred embodiment of the invention, and in which;-

Figure 1 is a fragmentary elevation, from the inside, of a door and its casing provided with the alarm.

Fig. 2 is a similar elevation larged scale of the circuit closer.

Fig. 3 is a top view of the same.

Fig. 4 is a similar top view in another condition. f y

Fig. 5 is an elevation, partly in section, of the circuit closer at another period.

Fig. 6 is a perspective view of the door plate.

Fig. 7 is a perspective view of the casing plate.

Referring now to Fig. 1. there is shown a door 1 connected to its casing 2 by hinges 3 (of which one only is shown) and having a lock 4 cooperative with the casing to keep the door closed. The present invention concerns enewed November 6, 1925.

particularly a circuit closing device includingP members fixed to the door and to tbe casing which cooperate to close an electric circuit and to give a signal when the door is Vtorced bodily trom the casing. and which remain undisturbed during normal swinging movement ot the door during opening and closing; of the same. Y

A plate 5 is fixed rigidly to the door 1, as by screws, and has an outwardly projecting extension 7 provided with a hole 8 in which a stem 9 is adapted to be slidably carried. As will appear this stem may be made to serve as a bolt, viewing the device in some aspects.

A brake is provided. to resist sliding movement of the stem 9. In the present embodiment this movement may be resisted by a set screw or pin 1.0. which may be set against the stem with more or less pressure. The stem 9 has a head 11 at one end and is threaded at the other end to carry a terminal plate 1:2 having an opening provided with corresponding threads. The position ot the terminal plate 12 on the stem 9 may be determined by a check nut 13. A second plate 6 is iixed to the casing 2 and has a projecting extension 1.4- provided with an open slot or recess 15 adapted to reeive a part ot the stem 9 adjacent the head 11 when the door is closed. The extension 14 is preferably faced off at 14 in order to permit tree engagement and disengagement ot the head 11 within the slot 15 during pivotal closing and opening of the door wit-hout disturbing the adjustment of the stem 9 on the plate 5.

By the present invention a normally open electric circuit is closed upon edgewiseseparating movement between the door 1 and the casing 2 inc-ident to the forcing' of the door b v a jimmy or other tool in an attempt at violent entry. In the embodiment illustrated and as shown bestv in Fig. 5 a binding post 16 is carried by the extension 7 and insulation 17 is interposed between the binding post and the extension. A second binding post 18 is carried by the extension 7 and is in direct ycontact therewith. Conducting wires 19 connect the

binding posts

16 and 18 with a source of electricity 20 and an alarm bell 21. Evidently the circuit is closed in Fig. by means of binding post 1G, plate f 12,V stem 9 and through extension 7 to binding post 18. y

The various chronological positions of the ttl) parts are illustrated by Figs. 2, 3, 4 and 5. From the position of Fig. 2 the device is set tor operation by sliding the stem 9 to the lett so that the head 11 is in contact with side ot the extension 14 remote from the door. rhe stem 9 is then rotated, (keeping' the head 11 in contact with the extension 14). thereby drawing terminal plate 12 to the right on the stem until a predetermined minimum space is left between the plate 12 and the terminal end 22 of the binding` post 1G. The check nut 13 is then tightened against the terminal plate 12 to assure a stationary position of the plate on the stem 9.

To guard against accidental disturbance` set screw 10 is next tightened to yieldingly retain stem 9 in position. The parts are now in the condition of Fig. 3, the head 11 ot the bolt lying against the extension 14 and the terminal plate 12 being spaced a minimum distance from the end 22 so that the circuit is open. In thisI condition the door may be opened and shut and may be locked or unlocked in the usual manner without disturbing the adjustment of the parts or operating the alarm.

The operation of the circuit closer to produce continuous ringingr of the alarm will now be explained with reference to Figs. 4 and 5. ln order to force an entrance a tool may be inserted between the door and casing` (Figi3 t), in the attempt to pry the door bodily toward the hinges and thus to disengage the ordinary locking means by causingan edgewise or other abnormal movement of the door. lVhen the door is forced to the lett away from the casing in an edgewise direction. the stem 9 and the terminal plate 12 may remain stationary. due to engagement of the head 11 with the plate 14, while the plate 5 moves with the door, sliding on the stem 9, so that the terminal 22 brought into contact with the plate 12, thereby closing" the circuit as described and operating* the alarm.

Continuous operation of the alarm will be maintained even it the door is allowed to spring' bach to its formed position since the stem 9 will in such event slide freely through the slot 15 to the position of Fig. 5 rather than move in respect to the extension 7. `by reason of the braking pressure exerted by the set screw 10. Thus the circuit will remain closed until reset from the inside of the door to its original inoperative condition by moving the stem 9 on the plate 7 to space the terminal 12 from the terminal By the construction described a device is provided which is simple and reliable and which operates automatically to accomplish the objects mentioned. lt will be noted that adjustment is possible whereby the space between

tlie terminals

12 and 22 may be made very small and since the consequent amount of forcing required to operate the alarm is of the same small extent the apparatus may be made extremely sensitive without preventingY normal use ot' the door.

By disconnecting; the wires 1Q or opening a switch the device described may operate as a loci; to prevent any edgewise separation between the door and the casing'. ln this case. the. plate 12 should be set am l, I.t the terminal so that no further movement is possible. while at the saine time the head 1l lies against the extension 14.

rllius bv the above ocscribed construction are accomplished, amongothers, the objects liereinbelore referred to.

As many changes could be made in the above construction and many apparently widely difierent embodiments this invention could be made without de rtincr trom the scope tliereot, itis intended tha all matter contained in the above description or shown in the accoinpa le' drznvingfs shall be interpreted as illustiatv and not in a limiting' sense.

It is also to be undo `stood that the language used in the 'i'olowingjf claims intended to cover all oi the generic and specific features ot the invention herein dcsc-ribed, and all statements ot the scope ct' the invention which, as a matter ot language, mig-ht be said to tall therebetween.

Having' described my invention what 1 claim as new and desire to secure by Letters Patent is y 1. In a device of the character described, in combination, a door and its ng, an electric circuit closer including,r two normally spaced terminals and means operated by only abnormal relative increment between said door when closed and said casing to complete the circuit through said terminals.

2. In a device of the cl'iaractcr described, in combination, a door and its casing, an electric circuit closer including two relatively movable tcrminals and means operated by abnormal relative movement between said door when closed and said casing to effect and thereafter maintain contact between said terminals although the door and casing are restored to normal relative position.

3. In a device oit the character described, in combination, a door and its casing, an electric circuit closer including two relatively movable terminals, and means permanentlyv positioned for operatiiin upon abnormal relative movement between said door when closed and said casingr to ctl'ect Contact between said terminals, said means being` inoperative. to close said terminals during normal movement ot the door -from closed position.

4. A closure operated circuit closer including in combination, a member adapted to be mounted on the closure and a member adapted to be mounted adjacent thereto, circuit closing contacts, and a contact operating art carried by one of said members and aving a connection with the other member to close said contacts when abnormal relative movement is imparted to said members, but

`being ineffective to close said contacts when the closure is moved normally toward open position. s

5. In a device of the character described, in combination, a door and its casing, an electric circuit closer including two relatively movable terminals and means operated by abnormal relative movement between said door and said casing to effect contact between said terminals, said means including coo erative terminal-moving devices on sai door and said casing, res ctively, adapted to remain inoperative urin normal movement of said door and a friction brake for the movable terminal to maintain said contact.

6. In a device of the character described, in combination, a door and its casing, an electric circuit closer including two relatively movable terminals, means operated by abnormal relative movement between' said door and said casing to effect contact between said terminals, saidvmeans including cooperative terminal-moving devices on said door and said casing, respectively, adapted to remain inoperative during normal movement of said door, a friction brake for the movable terminal to maintain said contact and means for adjusting said brake to vary the frictional effect.

7. A closure operated circuit closer including in combination, a member adapted to be mounted on the closure anda member adapted to be mounted adjacent thereto, circuit closing contacts, and a contact operating part carried by one of said members and having a cooperative connection with the other member to close said contacts when abnormal relative movement is imparted to said members, but being ineffective to close said contacts when the closure is moved normally toward open position, said contact operating art being adjustable to close the contacts a ter a predetermined movement, and friction means to maintain said contacts in closed position.

8. A closure operated circuit closer including in combination, a member adapted to be mounted on the closure and a member adapted to be mounted adjacent thereto, one of said members having an open slot, circuit closing contacts, and a contact operating part carried by one of said members and held in position for free entry into and passage from said slot under normal closing or opening movement of said closure, said operating part` cooperating with said other member to close said contacts under abnormal relative movement between said members.

'9. A closure operated circuit closer including in combination, a member adapted to be mounted on the closure, and a member adapted to be mounted adjacent thereto, circuit closing contacts, acontact operating part carried by one of said members and having a cooperative connection with the other member when said closure isA in closed position, said operating part being held in position to move into cooperative connecting position with said other' member and being freely movable to or from such position under normal closing or opening movement of said closure so said contacts are uneffected, said connection being operable to close said contacts when abnormal relative movement is imparted to said members.

10. 'A closure operated circuit closer including in combination, a member adapted to be mounted on the closure, and a member adapted to be mounted adjacent thereto, circuit closing contacts, a contact operating part carried by one of said members and having a cooperative connection with the other member when said closure is in closed position, said operating part being held in position to move into connecting position with said other member and being freely movable to or from such position under normal closing or opening movement of said closure so said rcontacts are unefected, said connection being operable to close said contacts when abnormal relative movement is imparted to said members, and a friction holding device for automatically maintain- 'ing said contacts closed.

11. In a device of the character described, in combination, a plate adapted to be mounted on a swinging door, and a plate adapted to be mounted adjacent thereto, a combined member functioning as a locking bolt and as a circuit closing part movably carried by one of said plates and having a connection with the other plate when the door is in closed position, circuit closing contacts, said combined member being movable relative to its supporting plate upon edgewise movement of said door relative to its mountings to close said contacts and then abutting against said plate to function as a lock to resist said relative edgewise movement.

12. In a. device of the character described, in combination, a plate adapted to llt) be mounted on a swinging door, and

a plate adapted to be mounted adjacent thereto, a combined member functioning as a locking bolt and as a circuit closing part movably carried by one of said plates and lia-ving a connection with the other plate wnen the door is in closed position, circuit closing contacts, said combined member being movable relative to its supporting plate upon edgewise movement ot said door relative to its mountings to close said contacts and then abutting against said plate to function as a lock to resist said relative edgewise movement, said combined member being supported in position for free movement to or from connecting position wth said other plate when said door is swung normally.

13. In a device of the character described, in combination, a swinging door and its casing, an electric circuit closer including two normally spaced terminals, means operated by relative edgewise movement between said door and said casing to close said terminals including cooperative tern'iinal-moving` devices permanently positioned for cooperation on said door and said casing, respectively, adapted to remain inoperative during swinging` movement of said door and a friction bralte for the movable terminal to maintain said terminals closed.

la. In a device ot the character described, in combination, a swinging door and its casing, an electric circuit closer including a stationary and a movable terminal on one of said parts and means whereby said terminals are brought into contact to complete the circuit upon relative separating edgewise movement between said parts, said means including a headed stem carried by the movable terminal and al cooperating extension on the other part having an open slot adapted to receive said stem when said door is closed.

l5. In a device of the character described, in combination, a swinging door and its casing, an electric circuit closer, plates projecting from said door and said casing respectively, a stem slidable on the door plate edgewise of said door extendiin'; across the casing plate and having a head adapted to lie against the remote side oil' said plate, a terminal carried by said stein and a tei-ininal mounted on the door plate adjacent the terminal on said stem.

16. In a device of the character described, in combination, a swinging door and its casing, an electric circuit closer, plates projecting from said door and said casing respectively, a stein slidable on the door plate edgewise or said door extending across the casing plate and having a head adapted to lie against the remote side or' said plate, a terminal carried by said stem, a terminal mounted on the door plate adjacent the terv minal on said stem and an adjustable liriction pin on the door plate adapted to press against. said stem.

17. In a device ot the character described, in combination, a swinging door and its casing, an electric circuit closer, plates projecting from said door and said casing respectively, a stein slidable on the door edgewise of said door plate, an adjustable 'trietion pin on the door plate adapted to press against said stem, said stein extending across the casing plate and having a head adapted to lie against the remote side of said plate, a terminal having threaded connection with said stem and adjustable therem on and a terminal mounter on the door plate adjacent the terminal on said stem.

In testimony whereof I al'lix my signature.

DAVID L. GRDN.