US2766357A - Chatterless contact arrangement for relays - Google Patents

Chatterless contact arrangement for relays Download PDF

Info

Publication number
US2766357A
US2766357A US364432A US36443253A US2766357A US 2766357 A US2766357 A US 2766357A US 364432 A US364432 A US 364432A US 36443253 A US36443253 A US 36443253A US 2766357 A US2766357 A US 2766357A
Authority
US
United States
Prior art keywords
contact
springs
relays
friction
chatterless
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
US364432A
Other languages
English (en)
Inventor
Berg Herbert
Darr Christian
Wilhelm Herbert
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.)
Siemens and Halske AG
Siemens Corp
Original Assignee
Siemens Corp
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 Siemens Corp filed Critical Siemens Corp
Application granted granted Critical
Publication of US2766357A publication Critical patent/US2766357A/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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements

Definitions

  • the present invention makes it possible to obtain much more nearly constant conditions of wiping friction of almost unchanging magnitude, by coating the frictionally engaging surfaces with a viscous, for example oily, liquid or with a pasty substance.
  • a viscous for example oily, liquid or with a pasty substance.
  • the degree of friction of such a viscous or pasty substance is constant if its viscosity can be maintained constant. It will therefore be advisable to employ liquids or pastes Whose viscosity is as insensitive to temperature changes as possible. It is preferable to employ pastes that combine the consistency of petroleum jelly with a high damping factor. In addition, it is important that the paste possess a high degree of tackiness (little tendency to creep) and that its viscosity be. independent also of the mechanical load imposed on it, that is, it should not be thixotropic.
  • interengaging springs are formed with small depressions so as to insure more uniform distribution of the liquid or paste over the frictional surfaces and to impede, as far as possible, lateral oozing-out of the paste from between the relatively moving surfaces.
  • this expedient enhances the damping action, as it adds the shearing stresses occurring upon rupture of the paste disposed in these depressions, to the internal friction in the thin film of paste interposed between the relatively moving surfaces.
  • the stationary frame 1 is formed with a resilient central Web member 2 forming the fulcrum of the relay armature.
  • the armature proper 3 which moves between the pole pieces 4 and 5 of the relay (shown only fractionally), carries a flange 6 which is bolted onto a flange 7 provided on the fulcrum member 2.
  • the flange 7 supports contact springs 8, 9 and 10.
  • the fulcrum member 2 tends to maintain the armature 3 and thus also the springs 8 to 10 in the illustrated normal position in which these parts are located midway between poles 4, 5 and between stationary contacts 11, 12 respectively.
  • Spherical contact points provided on the outer contact springs 8 and 10 co-operate with the stationary contacts 11, 12. The conductors leading to the various contacts have been omitted from the drawing for the sake of simplicity.
  • the armature 3 Upon energization of the relay, the armature 3 will be attracted to one or the other pole piece 4 or 5, causing either spring 10 to engage contact 12, or spring 8 to engage contact 11, and the corresponding spring is thereby more or less deflected, together with the remaining springs.
  • This causes relative displacement of the outer spring ends upon each other, in a direction parallel to the principal axis of the armature.
  • the springs 8 and 10 are pre-tensioned and are toward each other, at the stack 13, by means of a stud screw, so that the ends of these springs bear firmly against the intermediate spring 9.
  • a relay comprising a stack of a plurality of contact springs with predetermined cooperable limited areasthereof in opposed relation with said springs arranged to urge such cooperable limited areas thereof into an engaged relation, a viscous substance disposed between said cooperable areas operatively separating the surfaces of the latter which would otherwise enter into engagement, contact members for contact cooperation with said contact springs disposed outside of the stack formed thereby, electromagnetic means for effecting relative displacement between said contact springs and said contact membars to cause actuation of said contact springs whereby said predetermined limited areas are displaced relative to each other in a direction to apply frictional force to such viscous substance producing relatively constant internal friction therein with a corresponding elimination of mechanical friction which would otherwise occur between opposed contact surfaces of such areas in the absence of said viscous substance, recesses being formed at least in some of said contact springs to hold part of said viscous substance.
  • a relay comprising a stack of a plurality of contact springs with predetermined cooperable limited areas thereof in opposed relation with said springs arranged to urge such cooperable limited areas thereof into an engaged in? relation, a viscous susbtance disposed between said cooperable areas operatively separating the surfaces of the latter which would otherwise enter into engagement, contact members for contact cooperation with said contact springs disposed outside of the stack formed thereby, electromagnetic means for effecting relative displacement between said contact springs and said contact members to cause actuation of said contact springs whereby said predetermined limited areas are displaced relative to each other in a direction to apply frictional force to such viscous substance producing relatively constant internal friction therein with a corresponding elimination of mechanical friction which would otherwise occur between opposed contact surfaces of such areas in the absence of said viscous substance, holes being formed in at least some of said contact springs to permit passage of said viscous substance to either side thereof.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Vibration Prevention Devices (AREA)
US364432A 1952-07-12 1953-06-26 Chatterless contact arrangement for relays Expired - Lifetime US2766357A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE312782X 1952-07-12

Publications (1)

Publication Number Publication Date
US2766357A true US2766357A (en) 1956-10-09

Family

ID=6136897

Family Applications (1)

Application Number Title Priority Date Filing Date
US364432A Expired - Lifetime US2766357A (en) 1952-07-12 1953-06-26 Chatterless contact arrangement for relays

Country Status (3)

Country Link
US (1) US2766357A (en(2012))
BE (1) BE519889A (en(2012))
CH (1) CH312782A (en(2012))

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3048676A (en) * 1960-09-12 1962-08-07 Westinghouse Electric Corp Contact making devices

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1342674A (en) * 1916-04-25 1920-06-08 Cutlerhammer Mfg Co Switch
US1748219A (en) * 1928-01-31 1930-02-25 Signal Engineering & Mfg Co Electromagnetic relay
US2406036A (en) * 1943-05-22 1946-08-20 Bell Telephone Labor Inc Sealed contact device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1342674A (en) * 1916-04-25 1920-06-08 Cutlerhammer Mfg Co Switch
US1748219A (en) * 1928-01-31 1930-02-25 Signal Engineering & Mfg Co Electromagnetic relay
US2406036A (en) * 1943-05-22 1946-08-20 Bell Telephone Labor Inc Sealed contact device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3048676A (en) * 1960-09-12 1962-08-07 Westinghouse Electric Corp Contact making devices

Also Published As

Publication number Publication date
BE519889A (en(2012))
CH312782A (de) 1956-02-29

Similar Documents

Publication Publication Date Title
US2338474A (en) Thermostat
US2700079A (en) Snap action switch
US2508040A (en) Snap acting mechanism
US1668974A (en) Snap switch
US2426880A (en) Circuit breaker
US2418068A (en) Switch
US2750463A (en) Electric switches of the snap-action type
US2766357A (en) Chatterless contact arrangement for relays
US3035134A (en) Electric switches
US2429069A (en) Electrical circuit controller
US2529785A (en) Snap action switch
US2378784A (en) Snap-action switch
US3213244A (en) Motion translating and amplifying devices
US3041430A (en) Electric switches
USRE18630E (en) Hxuse electric
US3213228A (en) Snap-acting mechanisms
US2209352A (en) Automatic circuit breaker
EP0053843B1 (en) Mechanical switch
US1939285A (en) Switch
US2647189A (en) Thermally actuated electric switch
US2519334A (en) Snap acting mechanism
US2810026A (en) Electric switching devices
US2861142A (en) Snap switch-large air gap
US3339044A (en) Thermostatic switch
US1935304A (en) Centrifugal switch