US873638A - Burglar-alarm. - Google Patents

Description

PATENTED DEC. 10, 1907,

C. VAN BERGH.

BURGLAR ALARM.

APPLIGATION FILED JUNE 6, 1907.

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CARLOS VAN BERGH, OF WINNIPEG, MANITOBA, CANADA, ASSIGNOR TO THE VAN BERGH ELECTRIC PROTECTION SYSTEM 00., NEW YORK, N. Y., A CORPORATION OF NEW YORK.

BURGLAR-ALARM.

Specification of Letters Patent.

Patented Dec. 10, 1907.

To all whom it may concern:

.Be it known that I, CARLOS VAN BERGH, a subject of the King of Great Britain, and a resident of Winnipeg, in the Province of Manitoba and Dominion of Canada, have invented a new and Improved Burglar-Alarm, of which the following is a full, clear, and exact description.

This invention relates to certain improvements in burglar alarms, and more particularly to means whereby an electric bell and a talkin machine may be started in operation,

' to wor alternately and in succession to give the alarm upon the closing of the circuit by the intrusion of a burglar.

The invention further relates tomeans whereby the circuit after once having been closed is prevented from being broken again, save by one familiar with the construction of the device.

The invention consists incertain features of construction and combinations of parts, all of which will be fully set forth hereinafter and particularly pointed out in the claims.

Reference is to be had to the accompanying drawing, forming a part of this s ecification, in which the figure is a vertica section through a casing including mechanism con structed in'accordance with my invention.

In the specific form of my invention illustrated in the accompanying drawing, I rovide two independent circuits, one of w 'ch constitutes the primary circuit and extends into operative engagement with all of the windows, doors and other arts of the building, room,-vault, or the li e, which it is de sired to protect and operates a circuit closer for the secondary circuit, whereby the closing of the first circuit by the opening of a window, or the like, closes the secondary circuit. The secondary circuit includes its-own source of electric energy, together with mechanism set in operation thereby for giving the alarm.

As shown, the working parts of the device are inclosed within a casing 10, having a bell 11 mounted thereon, and a talking machine and the o crating mechanism therefor mounted wit the casing. Within the easing there is provided a battery 12, or other suitable source of electric energy for operatthe bell and the talking machine. The tliTkiug machine comprises a cylinder or other suitable rotatable member 13 having onehalf of the circumference thereof prepared horn 17, the larger end of .which extends through an o ening in the wall of the casing.

The outer en of the horn may, if desired, be provided with lattice work or a series of slats 18 to prevent the admission of foreign particles to the horn, inasmuch as the wall of the casin through which the horn extends would preferably be exposed through the wall of the building to permit of the sound being readily heard.

Mounted upon the same shaft with the cylinder 13 is a small wheel 19 of insulating material and having one-half of the circumference thereof provided with a circuit closing plate or a series of short-circuit closing plates 20. Mounted within the casing and extending into engagement with the surface of the wheel 19 are-two switches 21 and 22, whereby the circuit is closed during a portion of the revolution of the wheel. For rotatin the wheel 19 and the cylinder 13, I provlde a sprocket wheel 23 upon the same shaft, and

sprocket wheel engages with a inion 24 upon the armature shaft of a smal electric motor 25.

The bell 1 1 is preferably mounted upon the exterior of the casing, and the clapper mechanism for ringing the bell may be mounted within the same, or Within the casing. As shown, the clapper 26 and the electric operating mechanism therefor, is dis osed upon the inner side of the bell and the e ectric wires for operating the same are connected to terminals 27 and 28 upon the Wall of the casing.

The primary circuit includes a suitable source of electric energy 29 having the wire 30 leading from one pole thereof to two electromagnets 31 and 32 within the casing, and having the opposite pole of the battery connected bywires 33 and 34 to the separate electromagnets 31 and 32,respectively. The wire 33 extends into operative engagement with all of the windows, doors, transoms, screens, and other parts of the building, safe or vault, which it is desired to protect, and the circuit may be closed at any one of the points. The specific construction of this portion of the device comprises no part of the invention herein claimed and is illustrated only diagrammatically. In addition to the several terminals 35 within this wire, which may be closed by the entrance of a burglar, I also preferably provide a switch or push button 36 arranged in parallel therewith and preferably located adjacent the head-board of a bed, whereby a person may set off the alarm in case they hear a burglar in the house, or wish for any other reason to call the attention of the police, the watchman, or the general public.

The two electromagnets 31 and 32 within the casing are mounted adjacent each other, and pivotally mounted upon a suitable standard 37 is an armature 38 having the ends thereof adjacent the cores of the two electromagnets. The bar 38 carries a glass tube 39 su ported in a horizontal position and adapted to be filled to one-half its hei ht with mercury. Extending into one en of the tube are two platinum wires 40 and 41, one of which lies below the center and, therefore, normally lies within the mercury, and the other of which lies above the center and is therefore, normally out of engagement with the mercury. The wire 41 is connected directly to one pole of the battery 12, and the other wire is connected directly through the motor 25 to the op osite pole of the battery. In parallel with t e motor and circuit closure, there is rovided a branch circuit including a wire 42 lcading from the terminal 28 of the bell and a wire 43leading from the terminal 27 to the switch 22. The switch 21 is preferably connected to the wire 44, which leads from the motor direct to the battery. I

In the operation of my improved device, after the rimary circuitis closed by the entrance 0 a burglar or the closing of. the switch 36, the electromagnet 31 is energized to draw down the armature bar 38 and tip the mercury tube 39, and cause the mercury to cover both of the wires 40 and 41. This closes the secondary circuit through the motor and starts the latter in o eration. The rotation of the armature of t e motor causes the rotation of the cylinder 13 and the wheel 19, and starts the talking machine and the electric bell 11 to operati alternately and in'succession. During onealf the revolution of the cylinder 13 and wheel 19, the record 14 is in engagement with the needle 15 and the talking machine gives the alarm, as, for instance, by calling Help! Murder! Police! while during the remaining half of the revolution the record 14 is no longer in engagement with the needle 15, and the talking machine remains quiet while the electric bel 11 is rung either continuously or intermittently, depending upon the construction of the circuit closing plates 20. When it is desired to stop the operation of the; alarm, all that is necessary is to press the button 45 in the wire to close the circuit through the wire 34 and electroma et 32. This draws down the opposite en of the bar 38 and causes the bar and mercury tube to assume a horizontal position, and as soon as the mercury within the tube leaves the wire 41, the circuit through the motor' and the electric bell is broken and the operation of the alarm terminates.

The casi 10 is preferablymounted within the wall 0 the building with the end of the horn directed outward, so that any person passing along the street may hear. the voice of the machine and also hear the bell. The button 45 is preferably placed at some secret point where it can not readily be found by a urglar who has accidentally started the alarm in o eration, but at a oint wellknown to t e householder or ot er person who might desire to stop the apparatus from operating.

Having claim as new and Patent:

1. In an alarm system, the combination of a primary circuit, including an electromagnet and an alarm circuit including ,a circuit closer, said circuit closer com rising a tube. normally disposed 'horizont y, a liqui therein adapted to serve as an electric conductor, a terminal adjacent one end of the tube and uncovered by said liquid whenthe tube is in its horizontal position, said tube bei so mounted as to be inclined to bring the iquid into eng ement with said terminal and close the fiarm circuit upon the energizing of the electromagnet of the primary circuit, and a second electromagnet for restoring said tube to its horizontal position 2. In an alarm system, a talking machine including a rotatable member, a reproducer, and a horn, a motor for operating said talking machine, a casing inc osing said talking machine and motor, said horn oplening exteriorly of the casing, an electrica y-operated signal adjacent said casinginand means for operating said signal and ta 'ng machine intermittently an thus described my invention, I desire to secure by Letters in successlon.

3. An alarm circuit, including: circuit closer and a motor, atalking mac eincluding arotatable memberoperated by said motor and areproducer, the surface ofthe rotatable member be' constructed to operate the reroducer during a-portion only of each revoution, a branch circuit including an electric bell, and means operated by the motor for causing the branch circuit to ring the bell intermittently during that portion of each revolution of the rotatable member in which the reproducer is not operated.

4. In a' burglar alarm system, an alarm circuit, including a circuit closer and a motor, a talking machine operated by said motor, and a primary circuit including terminals aclapted to he brought into contact during In testimony whereof I have signed my the entrance of a burglar, and an electroma name to this specification in the presence of net, said circuit closer of the alarm circult two subscribing Witnesses.

comprising a horizontally disposed mercury CARLOS VAN BERGH. 5 tube adapted to be inclined by the closing of Witnesses;

the primary circuit and the energizing of the CLAIR W. FAIRBANK,

electromagnet thereof. EVERARD Bo MARSHALL.

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