US2439502A - Automatic fire alarm system - Google Patents

Automatic fire alarm system Download PDF

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Publication number
US2439502A
US2439502A US730069A US73006947A US2439502A US 2439502 A US2439502 A US 2439502A US 730069 A US730069 A US 730069A US 73006947 A US73006947 A US 73006947A US 2439502 A US2439502 A US 2439502A
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US
United States
Prior art keywords
switchboard
fire alarm
alarm system
circuit
automatic fire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US730069A
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English (en)
Inventor
Thomas J Tate
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE481770D priority Critical patent/BE481770A/xx
Application filed by Individual filed Critical Individual
Priority to US730069A priority patent/US2439502A/en
Application granted granted Critical
Publication of US2439502A publication Critical patent/US2439502A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch

Definitions

  • FIG. 1 A first figure.
  • the invention comprises a circuit utilizing the telephone wires from a switchboard, which circuit is normally open, but is closed by means of a thermostat set to operate at a desired temperature as, forexample, at 135 F.,
  • a blinker element or other device of a. character which will produce intermittent interruption of the electrical energy to cause the flickering of a light or other signal on a switchboard.
  • Fig. 1 is a diagrammatic view illustrating one I application of the invention
  • FIG. 2 a similar view of a modified form
  • FIG. 3 a similar view employing a combination of the disclosures of Figs. 1 and 2.
  • the invention may be applied to or used in conjunction with a conventional telephone system, including a switchboard or central station l0, generally referred to by the telephone company as a P. B, X system of forty-eight volts or less, lead wires or conductors H and I2 which terminate in a switchbox l3, from which telephone wires M are connected to an instrument consisting of a base I5 and a combination transmitter receiver It.
  • a switchboard or central station l0 generally referred to by the telephone company as a P. B
  • X system of forty-eight volts or less
  • lead wires or conductors H and I2 which terminate in a switchbox l3
  • telephone wires M are connected to an instrument consisting of a base I5 and a combination transmitter receiver It.
  • auxiliary means is provided for completing a circuit to the switchboard through the conductors II and I 2.
  • One way of accomplishing this completion of the circuit is by means of a circuit loop consisting of a conductor l1, connected at one end to the conductor II, and having its other end connected to an adjustable thermostat l8 constructed to move at a fixed temperature as, for example, F., or to move upon a rapid rise in temperature, and engage a conductor 19 which includes
  • the thermostat I8 is adapted to be located in any convenient position in the room to be guarded by the automatic alarm system, so that it will be influenced by heat in any part of the room.
  • the thermostat upon reaching a temperature of 135 F., or other setting, closes a circuit through the blinker element to the switchboard actuating a signal or an alarm at the switchboard or central station, and due to the blinker element in the circuit the electrical impulses will be interrupted in a manner to cause intermittent operation of the signal, such as flickering of a light.
  • the automatic alarm system includes a central station and auxiliary stations, with a signal at the central station energized by completion of a circuit by a thermostat at the auxiliary station for operation of a signal at the central station.
  • each auxiliary station which may be a room of a hotel, receives individual protection independent of every other station.
  • One important feature of the invention is that there is nothing to interfere with the telephone system when the invention is used, as there is only an open circuit connected to the conductors H and I2 until such time as the thermostat is energized to close the circuit.
  • the fire alarm system which is connected to the conductors H and I2, extend directly to the central station and may be connected to a signal mechanism 23 apart from the v switchboard"! and include a battery or other source of electrical energy 24 or may be connected directly to the switchboard l0 eliminating the necessity for the battery or source of electrical energy 24.
  • v a v a
  • An automatic fire alarm system which, in combination with an,--electrical telephone system having aoentral station with signalling means thereat and conductors extending to a telephone receiver at a location remote from said central station and through which conductors electrical energy is adapted to be supplied for actuating said signalling means at said central station from said switchboard, a signal in the switchboard or both.
  • receiver consists of a blinker element, anormally open thermostatically operated switch constructed to close by rise in temperature, and

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Fire Alarms (AREA)
US730069A 1947-02-21 1947-02-21 Automatic fire alarm system Expired - Lifetime US2439502A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE481770D BE481770A (xx) 1947-02-21
US730069A US2439502A (en) 1947-02-21 1947-02-21 Automatic fire alarm system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US730069A US2439502A (en) 1947-02-21 1947-02-21 Automatic fire alarm system

Publications (1)

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US2439502A true US2439502A (en) 1948-04-13

Family

ID=24933784

Family Applications (1)

Application Number Title Priority Date Filing Date
US730069A Expired - Lifetime US2439502A (en) 1947-02-21 1947-02-21 Automatic fire alarm system

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US (1) US2439502A (xx)
BE (1) BE481770A (xx)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2559372A (en) * 1948-12-10 1951-07-03 Howard A Rike Thermostatic switch
US2605342A (en) * 1948-12-10 1952-07-29 Sherman D Spurling Fire alarm system
US2615080A (en) * 1948-12-02 1952-10-21 Byron Jackson Co Sound indicator and fluid level indicator for wells
US2632155A (en) * 1947-11-07 1953-03-17 Anthony H Lamb Combination radio and fire alarm
US2642511A (en) * 1949-03-21 1953-06-16 Howard A Rike Thermal-sensitive actuator for fire alarms
US2648059A (en) * 1949-08-25 1953-08-04 Kaiser Frazer Corp Electrical indicating means
US2696524A (en) * 1949-12-23 1954-12-07 Jr Ross D Huntington Automatic fire and burglar alarm system for telephone subscribers
US2704814A (en) * 1951-07-23 1955-03-22 White Jesse Spruce Circuit makers and breakers for signal or alarm circuits
US3786502A (en) * 1971-12-17 1974-01-15 J Stendig Security system
US3801971A (en) * 1971-12-17 1974-04-02 J Stendig Telephone alarm system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US724093A (en) * 1902-02-14 1903-03-31 Benjamin O Fox Combined telephone, signal, burglar, and fire alarm.
US1685853A (en) * 1926-08-17 1928-10-02 Amedee S Mazzur Signal system
US2040309A (en) * 1933-06-02 1936-05-12 Hayden Kenneth Le Roy Protective signal system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US724093A (en) * 1902-02-14 1903-03-31 Benjamin O Fox Combined telephone, signal, burglar, and fire alarm.
US1685853A (en) * 1926-08-17 1928-10-02 Amedee S Mazzur Signal system
US2040309A (en) * 1933-06-02 1936-05-12 Hayden Kenneth Le Roy Protective signal system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632155A (en) * 1947-11-07 1953-03-17 Anthony H Lamb Combination radio and fire alarm
US2615080A (en) * 1948-12-02 1952-10-21 Byron Jackson Co Sound indicator and fluid level indicator for wells
US2559372A (en) * 1948-12-10 1951-07-03 Howard A Rike Thermostatic switch
US2605342A (en) * 1948-12-10 1952-07-29 Sherman D Spurling Fire alarm system
US2642511A (en) * 1949-03-21 1953-06-16 Howard A Rike Thermal-sensitive actuator for fire alarms
US2648059A (en) * 1949-08-25 1953-08-04 Kaiser Frazer Corp Electrical indicating means
US2696524A (en) * 1949-12-23 1954-12-07 Jr Ross D Huntington Automatic fire and burglar alarm system for telephone subscribers
US2704814A (en) * 1951-07-23 1955-03-22 White Jesse Spruce Circuit makers and breakers for signal or alarm circuits
US3786502A (en) * 1971-12-17 1974-01-15 J Stendig Security system
US3801971A (en) * 1971-12-17 1974-04-02 J Stendig Telephone alarm system

Also Published As

Publication number Publication date
BE481770A (xx)

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