US850287A

US850287A - Combined fire and burglar alarm.

Info

Publication number: US850287A
Application number: US31247106A
Authority: US
Inventors: Alexander M Bennett
Original assignee: Individual
Current assignee: Individual
Priority date: 1906-04-18
Filing date: 1906-04-18
Publication date: 1907-04-16
Anticipated expiration: 1924-04-16

Description

PATBNTED APR: 16, 1907.

l A. M. BENNETT. GOMBINBD-FIRB-AND B-URGLAR ALARM.

2 SHEETS-snm! 1.

APPLICATION FILED APB.. 18. 1906.

JNVENTOR TTORNE Ys,

PATENTED APR. 16, 1907.

Nor 850,287.

A M. BENNETT. COMBINED FIRE AND BURG'LAR ALARM.

' 2 SHEETS-salam ,2. A

APPLICATION FILED APBJB. 1906.

A NOR/v5 Ys WHA/55555.-

' ically sounding an alarm in case of fire UNITED sTATEs PATENT CEEICE.

ALExANnEH M. BENNETT, or ELIiswoETH, MICHIGAN, AssIGNoE `or CNE- HALE To CHARLES BENNETT, or ELLswoRTI-I, MICHIGAN.

COMBINED FIRE AND BUFKGLAR ALARM.

. Specification of Letters Patent.

Application led April 18, 1906. Serial No. 312,471.

Nc. 850,287. Patented April 1e, 1907.

Similar numerals of reference indicate corresponding parts in all of the figures of the drawings.

The improved device consists of a casing or housing 5, designed to be secured to a window-frame or other suitable support 6 by g means of screws or similar fastening devices To all when?,y it may concern: y Beit known that I, ALEXANDER M. BEN- i NETT, a citizen of the United States, residing l at Ellsworth, in the County of Antrim and ,l State of Michigan, have invented a new and f useful Combined Fire and Burglar Alarm, of which the followingfis a specification.

This invention relates to automatic fire 7. The casing 5 is preferably stamped from and burglar alarms for private dwellings, a single sheet of metal, one end of which is banks, hotels, and other buildings, and has bent to form a pocket 8 for the reception of a for its object to provide means for automator should an attempt be made by an unauthorl izedperson to enter the building.

A further object of the invention is to pro` vide a combined hre and burglar alarm ar` l ranged to be set into operation on the burnpair of Contact members, while the opposite end thereof is curled or bent upon itself to form a tube or explosive-chamber 9, the opposite endsof which preferably project beyond the adjacent walls of the pocket 8, as shown.

Seated in the pocket 8 is a block of wood or other insulating material 10, having a longitudinal recess or opening 11 formed therein, defining a pair of spring contact-

arms

12 and 13, the free ends of which are bifurcated, as

ing of a fuse or by the displacement of a wire or other ilexible medium operatively connected with a circuit-breaker.

' A still further object of the invention is to provide a pair of contact members normally minals 15 of an energized circuit 16, includseparated or held in inoperative position by ing 4a battery 17. The wires 16 are seated in wedge or circuit-breaker, the latter being grooves or channels 17, formed in the longim connected to the closure of an ex losivetudinal edges of the contact-arms, and are chamber, so that the burning of the use will provided with terminal loops which engage explode the contents of the chamber, and suitable blocks 18, extending thereby actuate the circuit-breaker to effect y across the bifurcated ends of. the sounding of the alarm. l arms, as shown.

With these and other objects in view theV l Arranged within the explosive-chamber 9 invention consists in the construction and is an explosive charge, preferably in the form novel combination and arrangement of parts of a cap or cartridge 19, and connected with hereinafter fully described, and illustrated in the cap 19 is a fuse 20, which extends to difthe accompanying drawings, it being under ferent portions ofthe building, so that in case stood that various-changes in form, proporof fire the fuse will be ignited, and thus extions, and minor details of construction may -plode the cap or cartridge. The free end of be resorted to within the scope of the ap the fuse 20 is provided with a torch 21, capapended claims. ble of being readily ignited in case of fire in In the accompanying drawings, forming a any portion of the room, and as many of part of this specification, Figure 1 is a perthese torches may be suspended from and spective view of the interior portion of a connected with the fuse as are found necesbuilding supplied with the improved autosary. Detachably secured to one end of the matic iire and burglar alarm. Fig. 2 is a lonchamber or tube 9 is a cap or closure 22, congitudinal sectional view of the casing or nected, through the medium ofacord, chain, housing, the detachable closure andcircuitor other ilexible connection 23, with a wedge breaker being also shown. Fig. 3 is a transor circuit-breaker 24,' the latter being adaptverse sectional view taken on the line 3 3 of ed to be interposed. between the free ends of F ig. 2. Fig. 4 is a detail perspective view of the contact-arms 12 and. 13, so as to normally one of the contact-arms. Fig. 5 is a side eleseparate the arms, and thus interrupt the cirvation showing the device usedk as a burglarcuit. alarm. Fig. 6 is a diagrammatical view The operation of the device is as follows: illustrating a modified' form of the invention. Should the woodwork or other portion of the transversely the contactindicated at 14, for the reception of the terroom catch on iire, the fusel20 will be ignited and in turn ignite the cap or cartridge 19, thereby causing the latter to explode and detach the closure 22. As the closure 22 is forcibly removed under the impulse of the explosive charge the wedge or circuit-breaker 27 is simultaneously withdrawn from between contact-

arms

12 and 13, thus closing the circuit through the battery and sounding the alarm 25, so as to notify the inmates of the building of impending danger. ln some cases, in addition to notifying the inmates of the building of the iire, it is also desirable to notify the fire department or central, so that the iire may be extinguished with the least possible delay, and in Fig. 6 of the drawings there is illustrated means whereby this result may be accomplished. In this form of the device the terminals of the local circuit are connectedfto a relay 26 at the central ofiice, said relay being adapted to actuate the armature 27 to close the signal-circuit 28, and thus simultaneously sound the alarm at central. 1n Fig. 5 of the drawings the device is shown used as a burglaralarm. In this form of the device a cord, chain, wire, or other flexible medium 29 is connected to the wedge or circuit-breaker 24 and the opposite end thereof extended across the windows and doors of the building,l so that if an attempt is made by an unauthorized person to enter the building the wire 29 will be actuated to withdraw the circuit-breaker, and thus sound the alarm. The wire 29 may extend to different portions of the room and may be connected with a cash-drawer, trunk, and various articles of furniture, so that the occupants of the building may at once be notified should an attempt be made to burglarize the building.

From the foregoing description it is thought that the construction and operation of the device may be readily understood by those skilled in the art, and further description thereof is deemed unnecessary.

Having thus described the invention, what is claimed isa 1. In a combined iire and burglar alarm, a plurality of contacts, an energized circuit connected to the contacts and including an alarm, a chamber, a closure for one end of the chamber, a circuit-breaker interposed between the contacts for normally holding the same separated and operatively connected with the closure, said circuit-breaker being movable-to inoperative position to sound the alarm when the closure is removed.

2. In a combined fire and burglar alarm, a plurality of contacts, an energized circuit connected to the contacts and including an alarm, a chamber, an explosive charge arranged within the chamber, a fuse communicating with the explosive charge, a closure for the chamber, a circuit-breaker interposed between the contacts and operatively connected with the closure, said circuit-breaker being movable to inoperative position to sound the alarm under the impulse of the explosive charge.

3. In a combined iire and burglar alarm, a casing, a pair of contacts, an energized circuit connected to the contacts and including an alarm, a chamber, an explosive charge disposed within the chamber, a fuse communicating with the explosive charge and provided with a torch, a closure for the explosive-chamber, a circuit-breaker interposed between the contacts, and a connection between the circuit-breaker and closure, said circuit-breaker being movable to inoperative position under the impulse of the explosive charge. i

4. In a combined 'lire and burglar alarm, a casing having one end thereof provided with a chamber and its opposite end formed with a pocket, a pair of contact members seated in the pocket, an energized circuit connected to the contacts and including an alarm, an explosive charge disposed within the chamber, a closure for said chamber, and a circuitbreaker interposed between the contacts and operatively connected with the closure, said circuit-breaker being moved to inoperative position to sound the alarm under the inipulse of the explosive charge.

5. In a combined fire and burglar alarm, a pair of contact-arms having their ends bifurcated, an energized circuit the terminals of which are extended to form loops seated in the bifurcated ends of the contact-arms, strips interposed between the loops and the adjacent faces of said arms, an alarm included in the circuit, and a circuit-breakerV interposed between the contact-arms and movable to inoperative position to sound the alarm.

6. In a combined fire and burglar alarm, a pair of contact-arms having their ends bifurcated and their opposite longitudinal edges formed with grooves, an energized circuit the terminals of which are seated in said grooves and provided with terminal loops engaging the bifurcated ends of the contactarms, strips interposed between the loops and the adjacent faces of said contact-arms, an alarm included in the circuit, a circuitbreaker interposed between the contactarms, vand a iiexible connection secured to the circuit-breaker for withdrawing the same from engagement with the contact-arms thereby to actuate the alarm.

7. ln a combined lire and burglar alarm, a casing having one end thereof bent to form a pocket and its opposite end curved laterally to produce a tube the opposite ends of which extend. beyond the adjacent walls of the pocket to form a chamber, a pair of spring- IOO IIO

contacts seated n the pocket, an energized l In testimony that I claim the foregoing as circuit connected to the contacts and in my own I have hereto a'lhxed my signature oludng an alarm, an explosive Charge dsn thepresenee of two Witnesses.

posed Within the chamber, a closure for one r ALEXANDER M. BENNETT.

end of the tube, a circuit-breaker interposed TWitnesses: between the contacts, and a flexible connec- CHAS. KINNER, tion between the ercut-breaker and closure. ISABEL U. HARRIS.