US501653A - Automatic fire-alarm - Google Patents

Automatic fire-alarm Download PDF

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US501653A
US501653A US501653DA US501653A US 501653 A US501653 A US 501653A US 501653D A US501653D A US 501653DA US 501653 A US501653 A US 501653A
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alarm
automatic fire
strips
metal
box
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit

Definitions

  • the Object of my invention is to provide a device, by means of which, an alarm of tire is given automatically', when the atmospherein any part of a building, has reached a given point of heat.
  • FIG. 1 represents a front View, as it appears when attached to a wall, showing in dotted lines, the circuit, broken.
  • Fig. 2. represents a front View, with the cover of the device removed, to show the internal construction, and showing the circuit, closed.
  • Fig. 3. is a view of the saine in cross-section through the line 0c, cc.
  • a represents a box, composed of suitable, non-conducting material, having the slots c, e, in its sides, leading to the interior Z), and having a cover m, and the projection Z.
  • c, c are strips of metal, secured to the sides of the box a, by screws CZ, CZ, and extending through the slots c, e, to the interior Z), where they normally come in contact with each other by the spring of the metal.
  • g is a wire, attached to the interior end of one of the strips c, leading to the outside of the box a, through a hole ZL, where its end is adapted to be secured to the part Z, by a bit of wax; or metal which softens at a low heat; or provided with a loop, to which a thread is attached, as hereinafter described.
  • f, f are wires, secured in contact with the strips c, c, leading to a battery and alarm bell, neither of which is shown.
  • the operation is as followsz-The device7 having the strips c, C, disconnected (as shown in Fig. l.) by the wire g, which is secured by wax, fusible metal, or a thread; is secured against the ceiling or the wall of the several rooms in a building, and connected by wires f, f, to a battery, and an alarm bell which are situated preferably, in some one of the rooms which is usually or continually occupied.
  • the heat from the same would soften the wax, or fuse the metal, or burn the thread, and release the wire g, and allow the strips c, to come together and complete the circuit, and give the alarm.
  • an automatic circuit closer consisting of a box composed of nonconducting material having slots in its sides, and provided with a projection Z.; strips of spring metal secured to the sides of said box, and extending through said slots to the interior of the box, where they normally come in contact by the spring ot' the metal; a wire, connected with one of said springs, extending to the outside of said box and over the projection Z, and provided with a loop whereby the said strips may be held out of contact, by fusible metal, wax, or a cord; for the purpose, as shown and described.

Description

Patented July 18,1893.
(No Model.)
J HAVARD AUTOMATIC PIRE ALARM.
UNITED STATES PATENT OEEICE.
JOSEPH HAVARD, OF NEV BEDFORD, MASSACHUSETTS.
AUTOMATIC Fl RE-ALARVI SPECIFICATION forming part of Letters Patent No. 501,653, dated July 18, 1893.
Application filed May 10| 1893. Serial No. L73,662. (No model.)
To @ZZ whom t may concern.-
Be it known that I, JOSEPH Havant, a subject of the Queen of Great Britain, residing at New Bedford, in the county of Bristol and State of Massachusetts, have invented a new and useful Automatic Fire-Alarm, of which the following is a specification.
The Object of my invention is to provide a device, by means of which, an alarm of tire is given automatically', when the atmospherein any part of a building, has reached a given point of heat.
The accompanying drawings, illustrate my invention, in which- Figure l. represents a front View, as it appears when attached to a wall, showing in dotted lines, the circuit, broken. Fig. 2. represents a front View, with the cover of the device removed, to show the internal construction, and showing the circuit, closed. Fig. 3. is a view of the saine in cross-section through the line 0c, cc.
Similar letters refer to similar parts in the several views.
a, represents a box, composed of suitable, non-conducting material, having the slots c, e, in its sides, leading to the interior Z), and having a cover m, and the projection Z.
c, c, are strips of metal, secured to the sides of the box a, by screws CZ, CZ, and extending through the slots c, e, to the interior Z), where they normally come in contact with each other by the spring of the metal.
g, is a wire, attached to the interior end of one of the strips c, leading to the outside of the box a, through a hole ZL, where its end is adapted to be secured to the part Z, by a bit of wax; or metal which softens at a low heat; or provided with a loop, to which a thread is attached, as hereinafter described.
f, f, are wires, secured in contact with the strips c, c, leading to a battery and alarm bell, neither of which is shown.
The operation is as followsz-The device7 having the strips c, C, disconnected (as shown in Fig. l.) by the wire g, which is secured by wax, fusible metal, or a thread; is secured against the ceiling or the wall of the several rooms in a building, and connected by wires f, f, to a battery, and an alarm bell which are situated preferably, in some one of the rooms which is usually or continually occupied. Now, should a fire occur in any one of said rooms, the heat from the same would soften the wax, or fuse the metal, or burn the thread, and release the wire g, and allow the strips c, to come together and complete the circuit, and give the alarm.
In an electric alarm, an automatic circuit closer, consisting of a box composed of nonconducting material having slots in its sides, and provided with a projection Z.; strips of spring metal secured to the sides of said box, and extending through said slots to the interior of the box, where they normally come in contact by the spring ot' the metal; a wire, connected with one of said springs, extending to the outside of said box and over the projection Z, and provided with a loop whereby the said strips may be held out of contact, by fusible metal, wax, or a cord; for the purpose, as shown and described.
J OSEPII HAVARD.
Witnesses:
J OsEPH C. PATNAUDE, HENRY W. MAsoN.
US501653D Automatic fire-alarm Expired - Lifetime US501653A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3367175A (en) * 1958-12-31 1968-02-06 Avco Mfg Corp Ablation sensor
US3995246A (en) * 1975-02-04 1976-11-30 Morgan John M Device for controlling the temperature and protecting against excessive flow of current of electric installations

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3367175A (en) * 1958-12-31 1968-02-06 Avco Mfg Corp Ablation sensor
US3995246A (en) * 1975-02-04 1976-11-30 Morgan John M Device for controlling the temperature and protecting against excessive flow of current of electric installations

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