US1754349A - Electric switch - Google Patents

Electric switch Download PDF

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Publication number
US1754349A
US1754349A US671583A US67158323A US1754349A US 1754349 A US1754349 A US 1754349A US 671583 A US671583 A US 671583A US 67158323 A US67158323 A US 67158323A US 1754349 A US1754349 A US 1754349A
Authority
US
United States
Prior art keywords
contacts
coils
switch
electric
electric switch
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
Application number
US671583A
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English (en)
Inventor
Bruhlmann Gottfried
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BBC Brown Boveri AG Germany
BBC Brown Boveri France SA
Original Assignee
BBC Brown Boveri France SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BBC Brown Boveri France SA filed Critical BBC Brown Boveri France SA
Application granted granted Critical
Publication of US1754349A publication Critical patent/US1754349A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force

Definitions

  • Figures 1 and 2 are diagrammatic representations explaining the operation of the improved electric switch.
  • Figure 3 is an elevation partly in section of a practical embodiment of the invention.
  • a represent the terminals of the improved switch; 5, 6 represent its fixed contacts and c, a represent its movable contacts; d represents a cross member carrying the movable contacts; 6, e represent springs which transmit the pressure produced by the operating mechanism from the cross-piece d to the contacts 7), b; 7, f represent two conductor portions fixed to the movable contacts; g, 9, represent two coils fixed to the cross-piece d; h, It represent two flexible connections between the conductor portions f and the coils g.
  • the arrows indicate the direction of the current.
  • the coils g generate in the interior of the coils a magnetic field, which, to an observer looking into the interior of the coils, appears to be di- SWITCH 671,583, and in Germany November 6, 1822.
  • the reaction to the force exerted upon the movable contacts is taken, in this example, by the coils that is to say by the cross-piece d.
  • the force which is exerted by the operating come the said reaction, or at least overcome the original electro-dynamic or thermic force exerted upon the contacts. This is generally the case.
  • the springs e whose compression facilitates in general the separation of the contacts from each other, and consequently the formation of an electric are, are relieved of load by the force acting upon the co1'1- (luctors In many cases however the force which is exerted upon the cross piece d by the operating mechanism is not sufliciently great to offer sufiicient resistance to the repelling electro-dynamic and thermic forces that occur at the contacts when short-circuits take place. In such cases, according to this inventiomthe electro-dynamic forces which press the switch contacts together are produced between conductor portions that are connected mechanically to the fixed switch parts and to the movtacts b.
  • the magnetic field of the conductor por tions which causes the electro-dynamic pressing'of the movable contacts against the fixed contacts may in most cases be strengthened by the incorporation therewith of iron.
  • the coils 9 may be provided with iron cores with an air gap intervening. In this air gap an especially strong magnetic field would be generated, and in this field the conductors would move.
  • the magnetic field may be strengthened by means of iron cores within the coils, or by means of bell-shaped iron shells or casings g outside the coils.
  • contact elements disposed for movement into and out 01" contacting relation with respect to each other, and means forming part of such circuit and being operable upon the completion thereof by contacting action of said elements to provide a field wherein the lines of force thereof are unidirectional with respect to both elements and pass through the same in a direction substantially normal to their respective contacting surfaces.
  • contact elements disposed for'movement into and out of contacting relation with respect to each other; and coils associated respectively with said elements and forming part of such circuit being operable upon the completion thereof by contacting action of said elements to provide a current path of helical form wherein each of the convolutions of the helical path extends in the same direction as the others and wherein the axis of such path is substantially normal to the contacting surfaces of said elements.
  • contact elements disposed for movement into and out of contacting relation with respect to each other, and means forming part of such circuit and being operable upon the completion thereof by contacting action of said elements to effect application to said apparatus of an electrodynamic force urging said elements into contacting relation and whereinsuch force is proportional to the variation-of current in such GOTTFRIED BRI IHLMANN.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Push-Button Switches (AREA)
  • Tumbler Switches (AREA)
US671583A 1922-11-07 1923-10-29 Electric switch Expired - Lifetime US1754349A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA38848D DE398478C (de) 1922-11-07 1922-11-07 Schalter fuer grosse Momentanstromstaerken

Publications (1)

Publication Number Publication Date
US1754349A true US1754349A (en) 1930-04-15

Family

ID=6931044

Family Applications (2)

Application Number Title Priority Date Filing Date
US671583A Expired - Lifetime US1754349A (en) 1922-11-07 1923-10-29 Electric switch
US131329A Expired - Lifetime US1709947A (en) 1922-11-07 1926-08-25 Electric-switch apparatus

Family Applications After (1)

Application Number Title Priority Date Filing Date
US131329A Expired - Lifetime US1709947A (en) 1922-11-07 1926-08-25 Electric-switch apparatus

Country Status (6)

Country Link
US (2) US1754349A (de)
BE (2) BE313531A (de)
DE (1) DE398478C (de)
FR (2) FR572439A (de)
GB (2) GB206522A (de)
NL (2) NL13662C (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2767923A (en) * 1953-07-20 1956-10-23 Milwaukee Gas Specialty Co Modulating and shut-off control apparatus
US2799746A (en) * 1955-06-15 1957-07-16 Electronique & Automatisme Sa Electromagnetic relays
US2857543A (en) * 1956-06-06 1958-10-21 Walter H Kohl Cathode structure for indirectly heated narrow elongated emitting surfaces
US3056426A (en) * 1960-10-21 1962-10-02 Hauser Fred Distributors
US3092699A (en) * 1958-12-23 1963-06-04 Merlin Gerin Electrodynamic force-compensation pressure contacts for circuit breakers
US4467301A (en) * 1982-08-27 1984-08-21 Essex Group, Inc. Electric switch having enhanced fault current capability
US11033018B2 (en) * 2017-01-06 2021-06-15 Bayer Cropscience Lp Sensor for a wireless animal trap detection system

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE758950C (de) * 1940-02-09 1952-04-17 Porzellanfabrik Kahla Fuer Starkstromschalter bestimmter stift- und huelsenfoermiger Unterbrechungskontakt
NL68959C (de) * 1943-07-13
US2590523A (en) * 1947-10-11 1952-03-25 Westinghouse Electric Corp Circuit interrupter contact pressure increasing device
CH334097A (de) * 1955-04-06 1958-11-15 Bbc Brown Boveri & Cie Kontaktanordnung an Leistungsschaltern
NL300258A (de) * 1962-11-14
DE1278590B (de) * 1965-09-13 1968-09-26 Jennings Radio Mfg Corp Vakuumschalter
US6399907B1 (en) * 2001-06-13 2002-06-04 Honeywell International Inc. Helical coil switch contact assembly
DE10144440C1 (de) * 2001-09-06 2002-08-29 Siemens Ag Schaltkontaktanordnung mit einer Einrichtung zur Verstärkung einer zwischen Schaltkontakten wirkenden Kontaktkraft
FR2993092B1 (fr) * 2012-07-03 2015-04-17 Schneider Electric Ind Sas Appareil de coupure comprenant des moyens de maintien en fermeture des contacts

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2767923A (en) * 1953-07-20 1956-10-23 Milwaukee Gas Specialty Co Modulating and shut-off control apparatus
US2799746A (en) * 1955-06-15 1957-07-16 Electronique & Automatisme Sa Electromagnetic relays
US2857543A (en) * 1956-06-06 1958-10-21 Walter H Kohl Cathode structure for indirectly heated narrow elongated emitting surfaces
US3092699A (en) * 1958-12-23 1963-06-04 Merlin Gerin Electrodynamic force-compensation pressure contacts for circuit breakers
US3056426A (en) * 1960-10-21 1962-10-02 Hauser Fred Distributors
US4467301A (en) * 1982-08-27 1984-08-21 Essex Group, Inc. Electric switch having enhanced fault current capability
US11033018B2 (en) * 2017-01-06 2021-06-15 Bayer Cropscience Lp Sensor for a wireless animal trap detection system
US20210259237A1 (en) * 2017-01-06 2021-08-26 Bayer Cropscience Lp Sensor for a wireless animal trap detection system
US20230404060A1 (en) * 2017-01-06 2023-12-21 Discovery Purchaser Corporation Sensor for a wireless animal trap detection system

Also Published As

Publication number Publication date
GB255795A (en) 1926-07-29
GB206522A (de) 1924-12-18
NL13662C (de) 1925-10-15
BE334990A (de) 1926-07-31
BE313531A (de) 1928-11-15
US1709947A (en) 1929-04-23
NL17237C (de) 1927-11-15
FR32024E (fr) 1927-08-29
FR572439A (fr) 1924-06-05
DE398478C (de) 1924-07-09

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