US3764945A - Electrical switch devices - Google Patents

Electrical switch devices Download PDF

Info

Publication number
US3764945A
US3764945A US00222955A US3764945DA US3764945A US 3764945 A US3764945 A US 3764945A US 00222955 A US00222955 A US 00222955A US 3764945D A US3764945D A US 3764945DA US 3764945 A US3764945 A US 3764945A
Authority
US
United States
Prior art keywords
blade
contacts
switch
pair
electrical
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
US00222955A
Other languages
English (en)
Inventor
R Lacrampe
T Lacrampe
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3764945A publication Critical patent/US3764945A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/16—Contacts characterised by the manner in which co-operating contacts engage by abutting by rolling; by wrapping; Roller or ball contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements

Definitions

  • a movable blade extending between the station- [30] Foreign Application Priority Data ary contacts is formed with a hole housing the element Feb. 19, 1971 France 7105665 which is free to rotate about is centre aXis- Movement of the blade in one direction brings the element into 52 1,5, 335 1 7, 200 1 13 33 5 2 0 contact with both stationary contacts to make the cir- 51 Int. Cl.
  • H0lh 50/54 wit which is broken y the blade moving the element [58] Field of Search 335/187, 280; in the pp direction- The element is rotated y 200/166 3 the making and breaking movements so that deterioration of the elements curved periphery by wear and [56] Refe Ci d spark discharge is substantially prevented as different UNITED STATES PATENTS parts of the periphery come successively into contact 3,086,094 4/1963 Ovshinsky 200/166 BD the stanonary contacts 1,357.942 11/1920 Ballman 200/166 BD 6 Claims, 2 Drawing Figures ELECTRICAL SWITCH DEVICES The present invention relates to instruments intended for establishing or interrupting electrical circuits.
  • a moving blade or shutter comprises a riveted or mounted contact which bears against at least one stationary contact.
  • An object of the invention is to provide a switch device in which the above disadvantages are overcome or at least mitigated.
  • a switch device for connection to at least two separate points of an electrical circuit and for establishing or interrupting an electrical connection in a controlled manner between these two points, comprising two stationary contacts and a mobile short-circuit element capable of being brought into abutment against the two contacts by a control member, the short-circuit element being a body of rotation about an axis of symmetry and being mounted on the control member so as to be able to rotate about said axis.
  • a switch device formed according to the invention the life of the contacts is increased and it is possible to forego the mounting or riveting of the contacts. This leads to simplification in manufacture and improves operating reliability of apparatus using the device.
  • the short-circuit element is preferably made at least partially of precious metal, bearing against at least two stationary contacts and which, when current flows through it, establishes an electrical circuit.
  • the displacement of the short-circuit element produced by a mechanical control member, causes the interruption of the electrical circuit and possibly the closure of another circuit.
  • the short-circuit element may be a ball, a hollow sphere or a disk, preferably of precious metal.
  • FIG. I shows an electromagnetic relay which comprises a base 1 of insulating material to which are fixed stationary contacts 2, 3, 4, 5, a ball 6 which may be displaced between said stationary contacts.
  • the ball is freely housed in a hole in a blade 7, fixed to a mobile shutter 8, itself pivoted on a magnetic circuit 9, the shutter-8 being drawn back by a spiral spring 10.
  • a coil 11 which is supplied with current by terminals 12 and I3, creates the magnetic field which attracts the mobile shutter 8 which has the effect of causing the displacement of the ball 6 and of placing it in contact with the contacts 4 and whereas before the coil 11 was supplied with current, the said ball was establishing contact between the contacts 2 and 3.
  • the free mounting of the ball also has the advantage of avoiding rebounds.
  • the displacement of the ball during each control operation prevents repeated heating at one point of the ball, as well as preventing localised wear and tear of its outer surface.
  • the fact that a cold part of the ball touches the stationary contacts on each occasion prevents repeated heating of these contacts and causes their cooling which reduces the wear and tear almost completely, since they operate cold and this increases their life.
  • FIG. 2 illustrates an embodiment of the present invention in the field of quick-break contactors.
  • the device comprises an insulating casing l and its control button 2.
  • the stationary contacts 3, 4, 5 and the ball 6 which, in the stationary position, bears against the stationary contacts 4 and 5.
  • the mobile blade 7 has a hole in which the ball 6 is freely housed; its other end is supported at a joint 8 which is a so-called knife-joint.
  • a spring 9, secured at one end to the insulating housing 1, is connected at its other end to the moving blade 7 and keeps the blade pressed against the knife joint 8.
  • the hole in the blade in which the ball is freely housed is not necessarily the same shape as that of the ball; it may advantageously be rectangular. In the case where the short-circuit element is a disk, it is preferable that the hole is rectangular.
  • the fixed contacts also form a lateral abutment in order to limit the displacement of the short-circuit element perpendicular to the blade during the displacement of the latter.
  • the device formed in accordance with the invention may be used in all cases where it is desired to establish or interrupt any electric circuit.
  • Particularly advantageous applications may be in or as electromagnetic relays, contactors and micro-switches.
  • An actuatable electrical switch device comprising:
  • a spherical body having at least its outer surface made of electrically conductive material
  • said blade having an opening within which said spherical body is located, the edge of said opening being thin with respect to the diameter of said spherical body so that said body cannot be supported in a stable condition by said blade alone, and said single blade being the sole support for said spherical body when the latter is moving toward and away from said contacts, and
  • actuating means for moving said blade, whereby electrical conduction between said contacts can be established or interrupted.
  • a switch as defined in claim 1, comprising another pair of electrical contacts, each of the contacts being located at opposite sides of the other one of said slots.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Contacts (AREA)
  • Switch Cases, Indication, And Locking (AREA)
US00222955A 1971-02-19 1972-02-02 Electrical switch devices Expired - Lifetime US3764945A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7105665A FR2125743A5 (fr) 1971-02-19 1971-02-19
NL7204242A NL7204242A (fr) 1971-02-19 1972-03-29

Publications (1)

Publication Number Publication Date
US3764945A true US3764945A (en) 1973-10-09

Family

ID=26216214

Family Applications (1)

Application Number Title Priority Date Filing Date
US00222955A Expired - Lifetime US3764945A (en) 1971-02-19 1972-02-02 Electrical switch devices

Country Status (6)

Country Link
US (1) US3764945A (fr)
BE (1) BE778826A (fr)
BR (1) BR7200905D0 (fr)
DE (1) DE2206573A1 (fr)
FR (1) FR2125743A5 (fr)
NL (1) NL7204242A (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1215423A (en) * 1915-08-16 1917-02-13 Clarence Long C Current-limiter.
US1357942A (en) * 1920-11-09 Vwvwwwwvma
US3086094A (en) * 1958-02-24 1963-04-16 Tann Corp Magnetic switching device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1357942A (en) * 1920-11-09 Vwvwwwwvma
US1215423A (en) * 1915-08-16 1917-02-13 Clarence Long C Current-limiter.
US3086094A (en) * 1958-02-24 1963-04-16 Tann Corp Magnetic switching device

Also Published As

Publication number Publication date
NL7204242A (fr) 1973-10-02
BR7200905D0 (pt) 1973-06-28
DE2206573A1 (de) 1972-10-05
BE778826A (fr) 1972-08-01
FR2125743A5 (fr) 1972-09-29

Similar Documents

Publication Publication Date Title
US2633510A (en) Electric switch
JPH01166429A (ja) 回路遮断器
US3365561A (en) Multiple finger type current-carrying contact arm pivot assembly
US3202775A (en) Rotor type electric switch with resiliently mounted contact members
US3564184A (en) Electric circuit breaker
US3294932A (en) Wiping contact switch
US3196220A (en) Three position electric switch with aligned contact bearing surfaces
US2585824A (en) Electric switch
US3378663A (en) Pushbutton switch with improved guide means
US3060291A (en) Switching assembly
US3236965A (en) Sealed switch for strong currents
US3764945A (en) Electrical switch devices
US3991391A (en) Circuit interrupter with electromagnetic opening means
US2334562A (en) Electric contact element
US3324261A (en) Snap switch means
KR890001472B1 (ko) 회로차단기의 접촉자기구
US3194918A (en) Contactor for electric torpedoes
US2000442A (en) Electric circuit interrupter
US3609257A (en) Slide switch
US2399462A (en) Electric switch
US3668578A (en) Lightweight electromagnetic relay
US3322914A (en) Electric switch employing non-teasable movable contact mechanism
US3284731A (en) Auxiliary switch responsive to the movement of the circuit breaker linkage
US3312800A (en) Electrical switch employing improved contact break mechanism
US3204071A (en) Center-biased double-throw momentary contact switch