US1380493A - Automatic circuit-breaker - Google Patents

Description

P. L.-N|SSEN.

AUTOMATIC CIRCUIT BREAKER.

APPLICATION FILED AUG. 29, 1919.

1,380,493. Patented June 7, 1921.

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INVENTQR. Zefer L. Mame,

A TTORNE Y.

Maren;

t l l PETER L. NISSEN, OF KANSAS CITY, MISSOURI, ASSIGNOR TO THE UNITED STATES AUTOMATIC FIRE ALARM COMPANY, A CORPORATION OF MISSOURI.

AUTOMATIC CIRCUIT-BREAKER.

Specification of Letters Patent.

Patented June 7, 1921.

Application filed August 29, 1919. Serial No. 320,676.

T 0 all whom it may concern:

Be it known that I, PETER L. NISSEN, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Automatic Circuit-Breakers, of which the following is a specification.

'1 his invention relates to automatic circuit breakers for use in connection with fire alarm circuits and one object is to provide a simple, inexpensive and reliable device of this character which may "have the fuse easily renewed after being blown out.

A further object is to provide a circuit breaker which can be readily examined, reset for use, and replaced when necessary. Other objects will hereinafter appear, and in order that the invention may be fully understood, reference will now be had to the accompanying drawing, in which:

Figure 1 is a vertical central sectional view of the device set ready forvuse.

Fig. 2 is a plan view of the device.

Referring now in detail to the various parts, 2 designates a supporting member consisting of porcelain or other suitable insulator. Said supporting member 2 is provided with a transverse recess 4 to receive a pair of oppositely disposed conductorsb which are sealed in said recess 4 with wax or other suitable nonconducting material 8. Each conductor is provided at one endwith .a binding post 10, which extends through the supporting member 2, to receive one end of a wire 12 constituting part of a fire alarm or other circuit.

The adjacent ends of the conductors 6 rest upon the upper ends of a pair of resilient contact members 14, extending downwardly through an opening 15 in the axis of a boss 16 constituting a portion of the supporting member ,2. The upper portions of the contact members 14 are spaced apart and secured to a block of insulation 18 held within the boss 16 by plaster of Paris or other nonconducting cementitious material 20.

The contact members 14 after leaving the boss 16 are bent apart as indicated at 22 and then toward each other and have their lower terminals secured together by fusible metal 24.

In practice the supporting member 2 is secured by bolts or screws passed through hole 26 to the c g or Wall of. a buddin protected by the fire alarm circuit, the current of which flows from one wire 12 to the other through the binding posts 10, the conductors 6, and the contact members 14. Should a fire occur and melt the fuse 24, the lower ends of the contact members 14 immediately spring apart and open the fire alarm circuit which sends in an alarm.

With a construction such as above described, the parts may be readily assembled and after the thermostat has acted it is only necessarv to again secure the lower ends of the resilient contact members 14 together with fusible material, to place the device in active po'sition' From the foregoing description it is apparent that I have produced an inexpensive thermostat consisting of but few parts not liable to get out of order and which is reliable in operation, and while I have shown and described the preferred form of my invention, I reserve the right to make such changes in the construction, combination and arrangement of parts as properly fall within the spirit and scope of the claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent, is:

1. In a device of the character described, an insulator having a transverse recess therein, a pair of oppositely-disposed conductors sealed within said recess, a pair of resilient contacts each having one end projecting from the insulator and its opposite end secured within said insulator and in permanent contact with its respective conductor, and fusible means to normally hold the outer ends of the contacts together, so that an electric current may pass from one conductor to the other through said contacts.

2. In a device of the character described, an insulator having a boss projecting therefrom, a pair of resilient contacts-each having one end extending into the boss, insulation sealed within the boss and separating the inner ends of the contacts, fusible means normally connecting the outer ends of the contacts, and conductors spaced apart and each in permanent engagement with the inner end of a respective contact.

In testimony whereof I afiix my signature,

in the presence of two witnesses.

PETER L. NISSEN. Witnesses:

F. G. FISCHER, L, J. F ISCHER.

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