US 1003009 A
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Description (OCR text may contain errors)
APPLICATION FILED MAR.13, 1911.
1,003,009. Pa nted Sept. 12,1911
8 mum wow EcZwin/Beimam/m abfoimw citizen of Germany, residing at Goldfield,
UNITED STATES PATENT OFFICE.
EDWIN REIMANN, OF GOLD-FIELD, NEVADA.
To all whom it may concern: I Be it known that I, EDWIN REIMANN, a
in the count-y of Esmeralda and State of Nevada, have invented certain new and use- 'jectof the invent-ion being to provide an extremely. cheap, simple and serviceable device of this character, which may be readily installed and-which in the event of a fire will automatically close an electric circuit and cause an alarm to be sounded, the mventlon conslstlng 1n the construction, combination and arrangement of devices, hereinafter described and claimed.
In the accompanying drawings-Figure 1.is a perspective View of a fire alarm circuit closing device constructed in accordance with my invention, a portion of the inclosing casingbeing'broken away. Fig. 2 is a longitudinal central sectional view of the same. Fig. 3 is a transverse sectional view of the same.
In accordance with my invention, I provide a casing 1, which is made of paper or other suitable inflammable material. and is here shown as tubular in form and closed at its ends. A plate 2 which is preferably made of sheet copper but may be made of other suitable material, is disposed in one end of the casing and is attached to a conducting wire 3, which projects through and leads from the said end of the casing. This plate constitutes a contact device or electrode. In accordance with my invention, this plate at the inner end thereof, is coated on both sides with a readily fusible and insulating material such as parafiin', the said coating or fusible material being indicated at 4. In practice this insulating coating may be of any suitable thickness and of any suitable density, and degree of fusibility, so that it may be predetermined to be melted at any desired temperature, such as 100, 120, 140, 160 or 180 degrees F. or any other temperature.
In the opposite end of the casing 1 is a circuit closing spring 5, which comprises coils 6, from the ends of which extend a pair of crossed arms 7 the terminals 8 of which Specification of Letters Patent.
Patented Sept. 12, 1911.
Application filed March 13, 1911. Serial No. 614,025.
bear on opposite sides of the insulating fusible coating' on 'the contact plate 2. These terminals of the arms are gripped by the action of the spring coils 6, on the insulating coating. A conducting wire 9 is attached to the circuit closing spring 5, and extends through the end of the casing in which'the coils of the said spring are located.
In practice the conducting wires 3, 9 form part of a normally open electric circuit which includes a suitable electric bell or,
other translating device. It will be understood that owing to the provision of the insulating coating on the contact plate 2, the circuit is normally broken or open between the said contact plate. and the terminals 8 of the arms of the spring.
In the event of any abnormal increase in temperature in the vicinity of the device, the insulating coating 4 will meltand the arms of the spring 5 with the plate 2, thereby closing the circuit and causing the alarm to be sounded.
Should a fire occur in the immediate vicinity of the device, the inflammable casing will instantly burn, and cause the immediate melting of the insulating coating, and the alarm to be sounded.
My fire alarm circuit closing device may be readily manufactured at very slight cost, and when insulated requires no attention whatever, and yet can be relied upon to close a circuit and sound an alarm in the event of a fire or dangerous rise in the temperature.
The-device is also useful for indicating undesirable, but not necessarily dangerous increases in temperaturei as the coefiicient of fusibility of the insulating coating may be predetermined and the device caused to give an alarm when any predetermined temperature is reached.
I claim 0 1. The herein described fire alarm cir; cuit closing device comprising a. contact plate, a coating of fusible insulating material on opposite sides thereof. a contact spring having a pair of arms bearing on the outer sides of the insulating coating, and kept thereby normally out of contact with the contact plate, and a casing inclosing said spring, said contact plate and said fusible insulating coating.
2. The herein described fire alarm circuit closing device comprising a contact late, a coating of fusible insulating material on opwill come in contact posite sides thereof, a contact spring hav- I In testimony whereof I hereunto :ifiix my ing a pair of arms bearing on the outer sides signature in the presence of two Witnesses.
of the insulating coating, and kept thereby normally out of contact with the contact EDWIN REIMANN. plate, and an inflammable casing inclosing Witnesses: said spring, said contact plate and said fu- FRITZ STIEWE,
sible insulating c0ating.- OSCAR STEINMANN.-.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,
- Washington, D. (1.