US916711A - Automatic electric fire-alarm. - Google Patents
Automatic electric fire-alarm. Download PDFInfo
- Publication number
- US916711A US916711A US42558708A US1908425587A US916711A US 916711 A US916711 A US 916711A US 42558708 A US42558708 A US 42558708A US 1908425587 A US1908425587 A US 1908425587A US 916711 A US916711 A US 916711A
- Authority
- US
- United States
- Prior art keywords
- alarm
- lead wires
- automatic electric
- contact
- electric 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
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Classifications
-
- 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
- INVENTOFI '2 is a perspective view of a portion of Fig.
- My invention appcrtains to an electrical fire alarm, and has for its object an arrangement whereby the generation of heat of an undesirable degree or such as might develop combustion in proximity with my arrangement will effect the electrical announcement of the fact, the particular object being to announce fire in obscure or closed confines wherein my invention may be located.
- Figure 1 is a diagrammatic view of my invention.
- Fig. 3 is an elevation in cross section.
- Fig. 4 is an enlarged view of a portion of Fig. 3.
- Fig. 5 is a modified construction of my invention.
- I form an insulating compound 13 consisting of a mixture of beeswax and resin, which in their preparation are fused and allowed to cool, after which the mixture is pulled or worked until its color is a chestnut brown. The mixture is then reheated until it is soft enough to adhere to the contact wires 10, the ends of which may then be dipped into the mixture and covered with the same and, after cooling, the contact wires 10 are then properly insulated and ready to be placed on the lead wires 8.
- the proportions of bees-wax and resin to be used may Specification of Letters Patent.
- the contact wire in the form of the hook 10
- it may be made as shown in Fig. 5 wherein the contact consists of the parts 14 secured on the main lead wires 8 over which they are bent so as to give a spring tension to the said parts 14 when they are held normally open by the insulation 13 which, when made malleable by heat, will be displaced by the tension of the parts 14 which will form a circuit.
- main lead wires In an electrically operated fire alarm signal circuit, main lead wires, a contact wire exercising a transverse strain on the main lead wires, and easily fused insulating ma terial between said contact and lead wires to maintain the circuit normally open.
- An electrically operated fire alarm comprising main lead wires, a series of contact wires having hooked ends provided with an easily fused insulating material and exercising a transverse strain on the main lead wires so that on the fusing of the insulating the main lead wires will penetrate said insulating and form an electric contact with the contact wire thus closing the electric circuit to operate a suitable signal.
Description
E. JOHNSON. AUTOMATIC ELECTRIC FIRE ALARM. APPLICATION FILED APR. 7, 190a.
91 6,71 1. Patented Mar. 30, 1909.
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INVENTOFI '2 is a perspective view of a portion of Fig.
UNITED STATES PATENT o EEroE.
ENOS JOHNSON, OF PITTSBURG, PENNSYLVANIA.
AUTOMATIC ELECTRIC FIRE-ALARM.
To all whom it may concern:
Be it known that I, Enos J OHNSON, a citizen of the United States, resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Automatic Electric Fire-Alarms; and I do hereby declare the following to be a full, clear, and exact description thereof.
My invention appcrtains to an electrical fire alarm, and has for its object an arrangement whereby the generation of heat of an undesirable degree or such as might develop combustion in proximity with my arrangement will effect the electrical announcement of the fact, the particular object being to announce fire in obscure or closed confines wherein my invention may be located.
In the accompanying drawings, Figure 1 is a diagrammatic view of my invention. Fig.
I Fig. 3 is an elevation in cross section. Fig. 4 is an enlarged view of a portion of Fig. 3. Fig. 5 is a modified construction of my invention.
The reference numerals in the specification refer to similar reference numerals in the drawings in which is an. electric battery 6 and an alarm bell 7 to which the main lead wires 8 having insulation 9 are suitably con nected. Contact wires 10 are adapted to engage the main lead wires 8 by means of the hooks 11 formed thereon and hold said lead Wires under tension. At the points where the hooked ends of the contact wires are placed over the main lead wires 8 the insulation 9, will be removed as at 12, (Fig. 2) and for the purpose of insulating the contact wire and effecting the purpose of my invention, I form an insulating compound 13 consisting of a mixture of beeswax and resin, which in their preparation are fused and allowed to cool, after which the mixture is pulled or worked until its color is a chestnut brown. The mixture is then reheated until it is soft enough to adhere to the contact wires 10, the ends of which may then be dipped into the mixture and covered with the same and, after cooling, the contact wires 10 are then properly insulated and ready to be placed on the lead wires 8. The proportions of bees-wax and resin to be used may Specification of Letters Patent.
Application filed April 7, 1908.
Patented March 30, 1909.
Serial No. 425,587.
be varied so as to give greater or less consistency to the mixture under different conditions, but generally the proportions of one (1) part bees-wax to three (3) parts resin will be satisfactory.
Instead of making the contact wire in the form of the hook 10, it may be made as shown in Fig. 5 wherein the contact consists of the parts 14 secured on the main lead wires 8 over which they are bent so as to give a spring tension to the said parts 14 when they are held normally open by the insulation 13 which, when made malleable by heat, will be displaced by the tension of the parts 14 which will form a circuit.
The operation of my invention is as follows: The development of heat in proximity with the insulation 13 such as has become sufficient to cause combustion in the surroundings, will soften the insulation and allow the wires to displace said insulation by reason of the tension under which they are held against the same and thereby connect with the contact 10 to efilect a circuit and ring the alarm hell 7. --It will be understood that any suitable form of annunciator may be used, and that my invention is applicable to other than electrically operated devices.
What I claim as my invention is:
1. In an electrically operated fire alarm signal circuit, main lead wires, a contact wire exercising a transverse strain on the main lead wires, and easily fused insulating ma terial between said contact and lead wires to maintain the circuit normally open.
2. An electrically operated fire alarm comprising main lead wires, a series of contact wires having hooked ends provided with an easily fused insulating material and exercising a transverse strain on the main lead wires so that on the fusing of the insulating the main lead wires will penetrate said insulating and form an electric contact with the contact wire thus closing the electric circuit to operate a suitable signal.
In testimony whereof, I the said ENos JOHNSON have hereunto set my hand.
ENOS JOHNSON.
Witnesses:
J. L. TREFALLER, Jr., WALTER 'FAMARISS.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US42558708A US916711A (en) | 1908-04-07 | 1908-04-07 | Automatic electric fire-alarm. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US42558708A US916711A (en) | 1908-04-07 | 1908-04-07 | Automatic electric fire-alarm. |
Publications (1)
Publication Number | Publication Date |
---|---|
US916711A true US916711A (en) | 1909-03-30 |
Family
ID=2985146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US42558708A Expired - Lifetime US916711A (en) | 1908-04-07 | 1908-04-07 | Automatic electric fire-alarm. |
Country Status (1)
Country | Link |
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US (1) | US916711A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3046536A (en) * | 1960-05-23 | 1962-07-24 | Alfred F Sciuto | Automatic fire alarm energizing means |
-
1908
- 1908-04-07 US US42558708A patent/US916711A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3046536A (en) * | 1960-05-23 | 1962-07-24 | Alfred F Sciuto | Automatic fire alarm energizing means |
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