US414155A - Electric fire-signal - Google Patents
Electric fire-signal Download PDFInfo
- Publication number
- US414155A US414155A US414155DA US414155A US 414155 A US414155 A US 414155A US 414155D A US414155D A US 414155DA US 414155 A US414155 A US 414155A
- Authority
- US
- United States
- Prior art keywords
- signal
- cup
- electric fire
- circuit
- battery
- 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
Links
- 230000011664 signaling Effects 0.000 description 8
- 239000012212 insulator Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 241000482967 Diloba caeruleocephala Species 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910000743 fusible alloy Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
Images
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. 2 and c are rigid metal rods or plates, which are bolted to a suitable insulatingblock d, by means of which they may be attached to the wall of a room to be protected from fire. These rods are connected with a suitable alarm-signal c by conductors f, in the line of which is interposed a battery g.
- the end of one of the rods 1) is cup-shaped, and in the cup is placed a piece It ofa metal alloy fusible at a low temperature, which is in constant contact with the end of the other rod, so that the circuit in which the battery and signal are included is constantly closed.
- the signal is one of a well-known sort, which gives an alarm only when the circuit is broken, the advantage of which is that the alarm will be given not only on the occurrence of fire, as hereinafter explained, but also if for any cause the battery or electric circuit should become disordered.
- Fig. 3 The apparatus shown in Fig. 3 is substantially the same, with the structural difference that there is no hole in the cup, but that the cup is made of such size relatively to the piece of fusible alloy that when it melts it shall sink in the cup out of contact from the end of the other rod.
- Fig. 1 I show the connection of several of the circuit-controlling devices arranged in different rooms of a building with a common battery and alarm-signal or annunciator c.
- I claim- 1 In an electrical signaling apparatus, the combination, with an electric circuit embracing a battery and signaling device, of two rigid terminals, one of which is provided with a cup into which the other terminal dips, aninterposed insulator which separates the rigid terminals, and an interposed fusible plug, substantially as and for the purposes described.
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire Alarms (AREA)
Description
(No Model.)
0. B. HEAD.
ELECTRIC FIRE SIGNAL. No. 414,155. Patented Oct. 29, 18.89.
UNITED STATES PATENT OFFIcE.
CHARLES B. IIEAD, OF ALLEGHENY, PENNSYLVANIA.
ELECTRIC FIRE-SIGNAL.
SPECIFICATION forming part of Letters Patent No. 444,155, dated October 29, 1889.
Application filed April15,1889. Serial No. 307,223. (No model.)
To aZZ whom it may concern.-
Be it known that I, OHARLEs 5. HEAD, of Allegheny, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Electric Fire-Signals, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a vertical sectional view of a building provided with my improved apparatus. Fig. 2 is an enlarged vertical sectional View of the terminals of the system and the interposed fusible metallic plug. Fig. 3 is a similar view illustrating a modification.
Like symbols of reference indicate like parts in each.
Referring to Fig. 2, Z) and c are rigid metal rods or plates, which are bolted to a suitable insulatingblock d, by means of which they may be attached to the wall of a room to be protected from fire. These rods are connected with a suitable alarm-signal c by conductors f, in the line of which is interposed a battery g. The end of one of the rods 1) is cup-shaped, and in the cup is placed a piece It ofa metal alloy fusible at a low temperature, which is in constant contact with the end of the other rod, so that the circuit in which the battery and signal are included is constantly closed.
The signal is one of a well-known sort, which gives an alarm only when the circuit is broken, the advantage of which is that the alarm will be given not only on the occurrence of fire, as hereinafter explained, but also if for any cause the battery or electric circuit should become disordered.
The operation is as follows: If afire should occur in the neighborhood of the rods 1) c, the heat will melt the metal piece h, which in liquid form will flow through a small hole formed in the bottom of the cup-shaped end of rod 0, thus breaking the circuit and giving the alarm.
The apparatus shown in Fig. 3 is substantially the same, with the structural difference that there is no hole in the cup, but that the cup is made of such size relatively to the piece of fusible alloy that when it melts it shall sink in the cup out of contact from the end of the other rod.
In Fig. 1 I show the connection of several of the circuit-controlling devices arranged in different rooms of a building with a common battery and alarm-signal or annunciator c.
I am aware that the terminals of an electric signaling-circuit have heretofore been connected by a fusible connection; but this I do not claim.
I claim- 1. In an electrical signaling apparatus, the combination, with an electric circuit embracing a battery and signaling device, of two rigid terminals, one of which is provided with a cup into which the other terminal dips, aninterposed insulator which separates the rigid terminals, and an interposed fusible plug, substantially as and for the purposes described.
2. In an electrical signaling apparatus, the combination, with an electric circuit embracing a battery and signaling device, of two rigid terminals, one of which is provided with a perforated cup into which the other terminal dips, an interposed insulator which separates the rigid terminals, and an inter posed fusible plug, substantially as and for the purposes described.
In testimony whereof I have hereunto set my hand this 13th day of February, A. D. 1889.
CHARLES .8. HEAD.
Witnesses:
W. B. OORWIN, T. W. BAKEWELL.
Publications (1)
Publication Number | Publication Date |
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US414155A true US414155A (en) | 1889-10-29 |
Family
ID=2483085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US414155D Expired - Lifetime US414155A (en) | Electric fire-signal |
Country Status (1)
Country | Link |
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US (1) | US414155A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3367175A (en) * | 1958-12-31 | 1968-02-06 | Avco Mfg Corp | Ablation sensor |
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0
- US US414155D patent/US414155A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3367175A (en) * | 1958-12-31 | 1968-02-06 | Avco Mfg Corp | Ablation sensor |
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