US772644A - Fire-alarm system. - Google Patents

Description

No. 7 '7 2,64. 'PATENTED OCT. 18, 1904. W. "L. DENIO.

FIRE ALARM SYSTEM.

APPLIGATIONIILED MAY 9. 1904 N0 MODEL.

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Patented October 18, 1904.

PATENT OFFICE.

WILLIAM L. DENIO, OF ROCHESTER, NEW YORK, ASSIGNOR OF ONE- HALF TOHOBART F. ATKINSON, OF ROOHESTER,-NEW YORK.

FIRE-ALARM SYSTEM.

SPECIFICATION forming part of Letters Patent No. 7 72,644, dated. October 18, 1904. Application filed May 9, 1904. Serial No. 207,141. (No model.)

To all whom it may concern: 1

Be it known thatLIVILLIAM L. DENIO, a resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Fire-Alarm- Systems; and I dohereby declare the follow-- means for informing the central or fire-alarm station whether an alarm-box was started by some accident or by the alarm-box being op erated in the prescribed manner.

Other subsidiary objects will appear from the following description andclaims.

In the accompanying drawings, F lgure 1 1s a diagrammatic view of a firm-alarm system emboclymg the lnventlonjandF g. 21s a side View of the manual push-rod. Fig. 3 1s a sec tion on line 3 3 of Fig. 2. Fig. 4 shows a modified detail, and Fig. 5 isa diagrammatic- View showing a modification.

The system illustrated has a central firealarm station A, from which extend any desired number of metallic circuits 1 2, but one being shown, in which at said station is a battery 3 and a magnet 4, called the alarm-relay-magnet. The-armature5 is normally attracted, being held away from the alarm-circuit contact 6, which is connected through magnet 7 a local battery 6 to the alarmbell '8, from which wire 9 leads to the lower contact of the telephone-switch, then by wire 10 to said armature 5. The armaturelO of magnet 7 called the .,telephone relay-magnet, when attracted releases arm 10 which drops onto contact 11, whichis-connected to the line-circuit, arm 10 being connected to Contactll is thus normally disconnected from the ground. of said induction-coil and to which isconnected the telephone-receiver 16.

The system also has connected to circuit 12 one or more fire-alarm "boxes B, placed at or near the building or' district to be protected. VVire 2 connects with box-terminal 18 then to spring 19, toothed wheel 20, adapted to send the box-number, to wheel 21, Which has an insulating-segment or other circuit-changing device, adapted to give warning of a coming alarm before the sending of the box-number by momentarily changing the circuit be fore the circuit-wheel operates. From wheel 21 'theconnection is by spring 22, wire 23, including a resistance 24, to terminal 25 of the box, to wire l, back to battery. Resistance 24 is made about equal to that-of the wiring extending through the building. One of the objects of this resistance'is to divert current to cause magnet 32 to be properly energized on closure of its circuit.

In the alarm-box is a-manual push-rod 34, consisting of a conducting-body 35, with an insulating sleeve or section 36, against which springs 37 38 normally bear. Preferably the push-rod is inclosed'in a glass cover, as com- 15 indicates the secondary coil mon in fire-alarms, the cover to be broken to get at the push-rod. Spring 37 is connected to box-terminal 25, and push-rod 34 is connected to the telephone-transmitter 40, to the primary coil of induction-coil 41, thence to the ground connection. The secondary of said induction-coil includes a receiving-telephone 42.

The connection from spring 37 branches to line 1- and also through resistance 24 to spring 22, through the wheels to spring 19, resistance 24 thus being in the normal main circuit. A third branch, 44, connects with the thermostat loop 45. Loop 46 is connected to magnet 32, armature 48, escapement 49, to wheels 20 21 in the main circuit. 'A- branch 50 extends to spring 38, normally disconnected electrically from spring 37 by sleeve 36.

part 35 of the push-rod when advanced elec- Conducting receive an answer-back signal from central, automatically returned by the sound of alarmbell 8, operating on the telephone-transmitter 13 in the ground connection at said central.

At one or more suitable points between wires 45 46 is or are connected auxiliary boxes G, adapted when operated to start box B by connecting contacts 40 40 by arm 40", which may be done by breaking glass tube 58, Fig. 1, and pushing up rod 58, which movement carries up arm 40 to connect said contacts, or the arm may be similarly moved by operation of one or more thermostatic devices 57. Operation of either the manual push-rod or the thermostatic devices trips the eccentric 57, having any suitable driving means, which mechanically operates a bell 40 in obvious manner. This bell operates on the auxiliary box-telephone transmitter, whereby the department or central operator can hear the auxiliary box at his receiver, and thus be informed that the signal is one to be responded to. The bell also serves as an alarm tending to prevent the sending of false alarms. Arm 40 when moved also closes a branch to ground through a primary coil and a telephone-transmitter 40, the secondary coil containing a receiver in its circuit. At some of the less important points to be pro tected instead of the described auxiliary box I may use a combined manual push-rod and thermostatic device, as indicated in Fig. 4, where 58 is a manual push-rod generally protected by a glass cover and controlling a ground branch, being normally separated from contacts 37 38, but when operated connecting them and closing said ground branch through telephone-transmitter40. The thermostatic part of this device 38 consists of two cup-like reverse bodies with an intermediate spring held under tension by fusible solder connecting the cups, this of itself being old. Such device I locate so that when released it acts on contacts 37 38 to connect them and to close the ground branch in the same Way as push-rod 58. hen the relaymagnet 7', Fig. 5, which corresponds to magnet 7 of Fig. 1 attracts its armature and closes the ground-telephone branch, the armature may be held against its contact by arm 60, which is arranged to fall when the armature moves forward.

From the above description it will be seen that normally the main circuit is closed as follows: from battery 3 to magnet 4, wire 2, box-terminal18, spring 19, the circuit-wheels, spring 22, resistance 24, and thence to wire 1 to battery. In this circuit,notwithstanding the inclusion of said resistance, is suflicient current to energize magnet 4 to hold its armature from back contact 6, holding alarmcircuit 9 open.

Suppose there comes an accidental break in circuit 1 2, circuit 9 will be closed by armature 5 and the bell will ring until its circuit is opened by the attendant. The closing of the local alarm-circuit 9 causes magnet 7 to attract its armature, closing the ground connection of the telephone-transmitter 13 and the primary coil 12 at central, and this will remain closed until arm 10 is moved back to its normal position. If \vhile said ground branch is closed the operator on listening at receiver 16 does not hear the noise of the signal-box acting on the transmitter in the box, he knows at once that the alarm was not sent by the proper operation of the box.

The signal-box transmitter should be so located that the noise of the box when operating and when the ground branch is closed will affect the transmitter, and thus the central receiver.

If the the signal-box is started by push-rod 35, so as to thereby connect springs 37 38, a branch circuit will be closed at the box extending from line-wire 1 to parts 37 38, to magnet 32, to the armature, to the numbervvheels, spring 19, to wire 2, which releases the box, and by listening at receiver 42 the one sending the alarm can hear it as it is delivered at central without anything being done by the operator there. On the other hand, if listening at receiver 16 the central operator hears the noise of the box, as well as bell 8, he knows that the box was started by pushrod 35, as otherwise there would be no complete telephone-circuit.

In case the fire-alarm box B was started by operation of an auxiliary box 0 the central operator at his telephone-receiver would hear the auxiliary-box bell acting on the :uljacent telephone transmitter, and each auxiliary box, if more than one such box is employed, being given a bell 4O of distinctive sound would locate the floor or part of the building from which the alarm was sent.

The enabling of the auxiliary-box operator, as well as the one operating the box directly, to get a telephone-answer back is important, as also is enabling the central to hear either the signal-box or the auxiliary, according to which sends the alarm.

Box B may have a thermostatic releasing device, as well as a manual one, if desired, and other modifications may be made within the scope of this invention.

What I claim is 1. In a fire-alarm system, a main circuit connecting a central station and an alarm-box, an audible boxnumberreceiving device, a ground branch from the main circuit at said central station containing a telephone, a second ground branch located at the alarm signalbox, a telephone therein. box-number-sendin g mechanism, a circuit-controller and magnet for releasing said sending mechanism, the circuit-controller also closing said ground branch at the box, whereby operation of said controller starts the signal-box and also renders the telephone-circuit operative.

2. In a fire-alarm system, a main circuit con' necting a central station and an alarm-box, an audible box-number-receiving device, a ground branch from the main circuit at the central station containing a telephone apparatus including an induction-coil, a transmit- 4 ter and receiver, a second ground branch at the alarm signal-box, a telephone apparatus therein including induction-coil, transmitter and receiver, box number sending mechan ism, a circuit, magnet and controller for releasing said sendingmechanism, the controller also closing said ground branch at the box.

-3. In a fire-alarm system,'a main circuit connecting a central station and an alarm-box, an audible box-number-receiving device, a

' ground branch from the main circuit at said central station containing a telephone, a-local circuit including said audible alarm, a magnet in the main circuit controlling said local circuit, and a magnet in the local circuit controlling the telephone branch.

4:. In a fire-alarm system, a main circuitconnecting a central station and an alarm-box,"an

audible box-number-receiving device, a normally open ground branch from the main circuit at said central statlon, a telephone in said ground branch, a local circuit controlled by number-sending means, and telephonesat the signal-box and at the auxiliary box;

6. In a fire-alarm system, a central-station receiving device, a main circuit, a telephone, a ground branch therefor, an alarm-box in the main circuit, and having number-sending parts through which the circuit is normally closed, a resistance therein, anormally operi' house-circuit, connected to the main circuit but.normally Without current, an auxiliary box, and telephonesat the alarm-box and at the auxiliary box;

7. In a fire-alarm system, a main circuit, the alarm-box, the normally open ground telephone-circuit and means which when opera- -ted release the-alarmbox and close said ground telephone-circuit.

8. In a fire-alarm system, the main circuit, central receiving means, an alarm-box, a releasing-magnet therefor, an auxiliary box connected to the alarm-box so as when operated to close the circuit through said releasingmagnet, and telephones in ground branches at a central station and at said boxes.

' 9. In a fire-alarm system, box-number-sending means, receiving means therefor, aboxtelephone in operative situation when an alarm is sent, and telephone-answer-back devices comprising an audible signal and an adceipt of an alarm to close the telephone-circuit. k

10. In a fire-alarm system, an alarm-box jacent telephone, and means operated by reincluding box-number-sending means, a tele phone in a normally inoperative branch, at said box, a fire-alarm house-circuit connected to said box, an auxiliary box connected to the house-circuit, means for operating the auxiliary box to close the house-circuit, 'a telephone at the auxiliary box'normally inoperative but made operative by said means for operating the auxiliarybox.

- 11. In a fire-alarm system, an alarm-box, an auxiliary box connected to the alarm-box, a telephone at the auxiliary box, a main circuit from the alarm-box to a central fire-alarm sta tion, and a telephone at said station adapted iliary box when the latter has been operated, In testimony whereof I have signed this specification in thepresence of two subscribing Witnesses. I

' WILLIAM L. DENIO,

Witnesses: I l

H. E. BALL, A. S. CAMPBELL.

to cooperate with the telephone at said aux-

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