US2805306A - Contact spring supports - Google Patents

Contact spring supports Download PDF

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Publication number
US2805306A
US2805306A US566296A US56629656A US2805306A US 2805306 A US2805306 A US 2805306A US 566296 A US566296 A US 566296A US 56629656 A US56629656 A US 56629656A US 2805306 A US2805306 A US 2805306A
Authority
US
United States
Prior art keywords
springs
shoulders
sheets
contact
contact spring
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
US566296A
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English (en)
Inventor
Leslie John Douglas
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 Brothers and Co Ltd
Original Assignee
Siemens Brothers and Co Ltd
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 Brothers and Co Ltd filed Critical Siemens Brothers and Co Ltd
Application granted granted Critical
Publication of US2805306A publication Critical patent/US2805306A/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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements

Definitions

  • This invention relates to supports for contact spring assemblies of the kind used in telephone and other light current relays, automatic telephone selecting switches and like electrical apparatus.
  • the support mainly from a sheet of suitable insulating material such as a thermosetting plastic material, with indentations formed in one edge to provide shoulders for the support of the contact springs, the indented sheet of the support being adapted for mounting alongside the assembly of contact springs it is to support with its plane at right angles to the planes of the springs.
  • suitable insulating material such as a thermosetting plastic material
  • Each indented sheet would have the shoulders formed by the indentations of a size and spaced apart to suit the contact spring assembly it is to serve and the size of the shoulders may be accurately determined by the forming process, any adjustments required may then be performed on the shoulders before or after assembling the pair of sheets.
  • the sheets would be secured to the apparatus, e. g. the yoke of an electromagnetic relay by any suitable means.
  • the indented sheet of a support is formed preferably by stamping but it may be formed by moulding and if necessary followed by a machining operation to attain the desired degree of accuracy. In the latter case the shoulders may be formed at right angles to the plane of the indented sheet which would enable the lugs normally provided on contact springs to be dispensed with.
  • FIG. 1 and 2 show side and perspective views respectively of a pair of contact spring supports according to the invention.
  • the supports are shown clamped to the yoke of a light current electromagnetic relay and are intended for use with a pair of contact spring assemblies of the kind described, not shown in the drawing, but which would be clamped to the yoke of the relay so that they lie one on each side of the supports with their springs extending in a direction parallel to the planes of the supports.
  • the contact springsupports comprise mainly a pair of broadly rectangular sheets 1 and 2 each provided with indentations shown at 3 along one edge, the material between adjacent indentations forming shoulders of a size and spaced apart to suit the contact spring assembly the sheet is to serve.
  • the sheets 1 and 2 may be very accurately formed from a sheet of thermo-setting plastic insulating material, for example that known as Bakelite, by stamping, or they may be moulded from such material and their shoulders subsequently operated on (e. g. machined) to attain a 'high degree of dimensional accuracy.
  • the sheets 1 and 2 are secured together by means of a metallic tube 4 spun over at its ends but the sheets are spaced apart by the intervention of spacer 5 carried by tube 4.
  • a metallic channel member 6 fits closely over the upper edges of the sheets 1 and 2 and is apertured for the passage of clamping screws 7 and 7 clamping the sheets to the yoke 8 (shown in part) of the light current relay.
  • the contact springs to be supported would constitute the so-called fixed springs of the two contact spring assemblies to be served by the supports and would lie with their planes substantially parallel to that of the yoke Sand at right-angles to the planes of the sheets 1 and 2 such that lugs or the like furnished on all the fixed springs towards their free ends engage with the several shoulders of the sheets with the spring assemblies in their normal or operated condition according to contact spring arrangements.
  • a spring set with a make action would have its fixed spring supported in the normal condition of the set, while the fixed spring of a spring set with a break action would be supported only when the set has been actuated.
  • the outer diameter of the spacer 5 is made substantially equal to the shortest distance between threaded holes formed in the yoke 8 for the reception of clamping screws 7 and 7 and the apertures in the channel member 6 similarly spaced apart so that the clamping of the sheets 1 and 2 to the yoke 3 serves to locate the shoulders in their true position relatively to the springs they are to support.
  • a contact spring support for use with fixed contact springs of a fixed and moving contact spring assembly whose springs are secured together and insulated from one another near one end in a pile, said fixed springs having near their free ends lugs which extend laterally from one side edge, said support comprising in combination a generally rectangular sheet of insulating material having indentations along one edge forming shoulders of a size and spaced apart to suit said contact springs and means clamping said sheet alongside said contact springs such that its plane is at right angles to the planes of said springs and parallel to the longitudinal direction thereof, and such that its shoulders extend towards the free ends of said springs so as to engage the lugs projecting from said fixed springs.
  • a contact spring support for use with fixed and moving contact springs secured together and insulated from one another near one end in a pile, said support comprising a generally rectangular sheet of insulating material having shoulders along one edge which extend at right angles to the plane of the sheet and which are of a size and spaced apart to suit said contact springs and means clamping said sheet alongside said contact springs with its plane at right angles to the planes of said springs.
  • a light current relay comprising two contact spring supports for contact spring assemblies mounted in parallel and in spaced relationship on a yoke for said relay, said assemblies containing fixed and moving springs secured together and insulated from one another near one end in a pile, said supports being also mounted in parallel and for supporting respectively the fixed springs of said assemblies comprising generally rectangular sheets of insulating material having shoulders along one edge of a size and spaced apart to suit the contact spring assembly it is to serve, means securing the two sheets of the supports together in parallel and spaced relationship and means clamping said sheets to said yoke between said assemblies so that the sheets lie alongside the springs they are to support with their planes at right angles to the planes of the springs and parallel to the longitudinal direction thereof and with their shoulders extending towards the free ends of the springs so as to be engageable by said fixed springs, said clamping means comprising clamping screws which pass through apertures in a channel member fitting closely over the upper edges of said spaced sheets and engage threaded holes in said yoke.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Telephone Set Structure (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Springs (AREA)
US566296A 1955-03-07 1956-02-17 Contact spring supports Expired - Lifetime US2805306A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB350998X 1955-03-07

Publications (1)

Publication Number Publication Date
US2805306A true US2805306A (en) 1957-09-03

Family

ID=10373805

Family Applications (1)

Application Number Title Priority Date Filing Date
US566296A Expired - Lifetime US2805306A (en) 1955-03-07 1956-02-17 Contact spring supports

Country Status (5)

Country Link
US (1) US2805306A (de)
CH (1) CH350998A (de)
DE (1) DE1011077B (de)
FR (1) FR1142329A (de)
GB (1) GB777762A (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2491272A (en) * 1947-03-28 1949-12-13 Bell Telephone Labor Inc Protective device for relay contacts
US2740871A (en) * 1949-02-24 1956-04-03 Vigren Sten Daniel Electrical contact spring assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2491272A (en) * 1947-03-28 1949-12-13 Bell Telephone Labor Inc Protective device for relay contacts
US2740871A (en) * 1949-02-24 1956-04-03 Vigren Sten Daniel Electrical contact spring assembly

Also Published As

Publication number Publication date
CH350998A (de) 1960-12-31
DE1011077B (de) 1957-06-27
GB777762A (en) 1957-06-26
FR1142329A (fr) 1957-09-17

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