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Thermal circuit-breaker

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US530430A
US530430A US530430DA US530430A US 530430 A US530430 A US 530430A US 530430D A US530430D A US 530430DA US 530430 A US530430 A US 530430A
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strip
end
contact
circuit
plate
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches
    • H01H37/74Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material

Description

(No Model.) I

H. KLEIN. THERMAL GIRGUIT BRBAKBR.

l No. 530,430. Patent-ed Deo. 4, 1894.

l I f l of the United States,

, PATENT orion.

HENRY KLEIN, OF JANESVILLE, WISCONSIN.

THERMAL CIRCUIT-BREAKER.

SPECIFICATION forming part of Letters Patent No. 530,430, dated December 4, 1894.

Application filled May 19l 1894. Serial No. 511,818. (No model.)

To all whom it may concern..-

Be it known that I, HENRY KLEIN, a citizen residing at Janesville, in the county of Rock and State of Wisconsin, have invented a new and useful Thermal Circuit-Breaker for Electrical Alarm-Circuits, of which the following is a specification.

This invention relates to thermal circuit breakers for electrical alarm circuits; and it has for its object to provide a new and useful device of this character that is adapted to be arranged or included in any suitable tire alarm circuit, that will provide for giving an alarm when the same is broken at any point, and to this end the present invention contemplates a circuit breaker device that provides for a normally closed circuit and which while extremely simple and inexpensive at the same time is sufficiently sensitive to heat as to provide for quickly opening the circuit and giving an alarm when subjected to the heat of afire, and in this use the device is especially useful in such places as iiour and planing mills.

With these and other objects in view which will readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination and arrangement of parts hereinafter more fully described, illustrated and claimed.

In the accompanying drawings: Figure 1 is a plan view of a thermal circuit breaker constructed in accordance with this invention. Fig. 2 is a central longitudinal sectional view of the same showing the springstrip as normally positioned to close the electrical circuit. Fig. 3 is a similar view showing the spring strip as released from the Xed con` tact plate. i

Referring to the accompanying drawings, 1 designates a cleat block made of wood or other suitable insulating material and which is adapted to be secured to a ceiling, wall or other point of attachment where it would be most desirable to position the circuit breaker to provide for the quick operation thereof in the event of the breaking out of fire. The cleat block 1, has secured to the outer face at one end the fixed copper, brass, or other suitable metal contact plate 2, that is fastened in position by means of screws, pins, or other suitable fastening devices 3, and said iixed contact plate 2, is adapted to have passed therethrough the binding post screw 4, a duplicate of which is passed through the other 5 5 end of the cleat block to provide means for securing the block to the wall, ceiling or other point of attachment, and said screws also act in the capacity of binding posts to connect the wire terminals with the fixed metal con-x tact plate 2, and one end of the spring contact strip 5, one end of which is secured fast to one end of the cleat block l, by means of one of the screws 4, and other suitable fastening devices.

By reason of securing one end of the strip 5, fast to one end of the cleat block 1, the other end of said strip will be left free, and the said strip is outwardly bowed from its point of attachment to the cleat block to provide for a normal spring, or tendency to spring, outward away from the fixed contact plate 2, and in addition to the normal outward spring of the strip 5, the same is caused to have a normal tendency to spring length- Wise or longitudinally by reason of securing the free end of the strip to the plate 2, by fusible solder 6, with the strip bowed outwardly so as to abnormally hold the free end secured to the contact plate at a point nearer to the fastened end of the strip, than when the strip is sprung outwardly from the contact plate.

The normal outward and lengthwise spring of the contact strip 5, assists very greatlyin breaking the electrical 'joint or connection with the contact plate 2, so that when heat has commenced to make the solder soft, the spring of the strip 5, will complete the disconnection by causing the strip to break awa from its soldered connection with the plate 2, and thereby open the electrical alarm circuit to provide for giving the necessary alarm.

From the above it will be seen that the device while simple is extremely sensitive, and being very simple in construction with all the parts thereof exposed, the same may be readily dusted oftl at any time to free the solder from dust or dirt whereby the operation of the device may not become impaired.

ICO

ing its free extremity touching the fixed contact plate at a point nearer the fast end of said spring contact strip than the length of the latter, and fusible solder fastening the free extremity of said spring contact strip onto the fixed contact plate at the point of contact, substantially as set forth.

In testimony that I claim the foregoing as my own I have hereto aiiixed my signaturein the presence of two witnesses.

' HENRY KLEIN.

Witnesses:

JAS. A. FATHER, J. C. CARD.

US530430A Thermal circuit-breaker Expired - Lifetime US530430A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532081A (en) * 1945-08-08 1950-11-28 Jefferson Electric Co Thermal time lag fuse
US3423567A (en) * 1966-12-08 1969-01-21 Fieldcrest Mills Inc Electrically heated bedcovering
US3763454A (en) * 1972-02-22 1973-10-02 Tektronix Inc Thermal switch
US4451814A (en) * 1982-06-14 1984-05-29 Fasco Controls Corporation Non-resettable thermal fuse
US6204747B1 (en) * 1997-11-21 2001-03-20 James L. Kitchens Safety devices for electrical circuits and systems
US6603385B2 (en) 1997-11-21 2003-08-05 Safety Thermal Components, Inc. Safety devices for electrical circuits and systems
US20040069763A1 (en) * 2002-10-09 2004-04-15 E.G.O. Elektro-Geraetebau Gmbh Fuse mechanism for a heating device and heating device
US20060028315A1 (en) * 2004-08-04 2006-02-09 Uchihashi Estec Co., Ltd. Thermosensor, thermoprotector, and method of producing a thermosensor
US20070030110A1 (en) * 2005-08-02 2007-02-08 Uchihashi Estec Co., Ltd. Thermoprotector
US20070046418A1 (en) * 2005-08-30 2007-03-01 Eaton Corporation Electrical distribution device including protection for overheating conditions
US20160049275A1 (en) * 2014-08-18 2016-02-18 Borgwarner Ludwigsburg Gmbh Fuse for an electrical circuit and printed circuit board having a fuse

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532081A (en) * 1945-08-08 1950-11-28 Jefferson Electric Co Thermal time lag fuse
US3423567A (en) * 1966-12-08 1969-01-21 Fieldcrest Mills Inc Electrically heated bedcovering
US3763454A (en) * 1972-02-22 1973-10-02 Tektronix Inc Thermal switch
US4451814A (en) * 1982-06-14 1984-05-29 Fasco Controls Corporation Non-resettable thermal fuse
US6204747B1 (en) * 1997-11-21 2001-03-20 James L. Kitchens Safety devices for electrical circuits and systems
US6603385B2 (en) 1997-11-21 2003-08-05 Safety Thermal Components, Inc. Safety devices for electrical circuits and systems
US20040069763A1 (en) * 2002-10-09 2004-04-15 E.G.O. Elektro-Geraetebau Gmbh Fuse mechanism for a heating device and heating device
US6940052B2 (en) * 2002-10-09 2005-09-06 E.G.O. Elektro-Geraetebau Gmbh Fuse mechanism for a heating device and heating device
US7385474B2 (en) * 2004-08-04 2008-06-10 Uchihashi Estec Co., Ltd. Thermosensor, thermoprotector, and method of producing a thermosensor
US20060028315A1 (en) * 2004-08-04 2006-02-09 Uchihashi Estec Co., Ltd. Thermosensor, thermoprotector, and method of producing a thermosensor
US7345570B2 (en) * 2005-08-02 2008-03-18 Uchihashi Estec Co., Ltd. Thermoprotector
US20070030110A1 (en) * 2005-08-02 2007-02-08 Uchihashi Estec Co., Ltd. Thermoprotector
US20070046418A1 (en) * 2005-08-30 2007-03-01 Eaton Corporation Electrical distribution device including protection for overheating conditions
US7400225B2 (en) * 2005-08-30 2008-07-15 Eaton Corporation Electrical distribution device including protection for overheating conditions
US20160049275A1 (en) * 2014-08-18 2016-02-18 Borgwarner Ludwigsburg Gmbh Fuse for an electrical circuit and printed circuit board having a fuse
US9620321B2 (en) * 2014-08-18 2017-04-11 Borgwarner Ludwigsburg Gmbh Fuse for an electrical circuit and printed circuit board having a fuse

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