US3420973A - Adjustment-free preassembled contact unit for multiple contact relays which may be completely prefabricated by mechanical operations - Google Patents

Adjustment-free preassembled contact unit for multiple contact relays which may be completely prefabricated by mechanical operations Download PDF

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Publication number
US3420973A
US3420973A US632287A US3420973DA US3420973A US 3420973 A US3420973 A US 3420973A US 632287 A US632287 A US 632287A US 3420973D A US3420973D A US 3420973DA US 3420973 A US3420973 A US 3420973A
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US
United States
Prior art keywords
contact
free
adjustment
preassembled
relays
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Expired - Lifetime
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US632287A
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English (en)
Inventor
Josef Fischer
Herber Krautwald
Helmut Schedele
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Siemens AG
Siemens Corp
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Siemens Corp
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Publication date
Application filed by Siemens Corp filed Critical Siemens Corp
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Publication of US3420973A publication Critical patent/US3420973A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/56—Contact spring sets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/56—Contact spring sets
    • H01H50/58—Driving arrangements structurally associated therewith; Mounting of driving arrangements on armature

Definitions

  • the disclosure relates to a contact unit for multiple contact relays which will enable a mechanized and adjustment-free assembly thereof.
  • conventional production methods it is, as a rule, necessary in relay contact spring assemblies to combine the separate parts of each contact structure into a unit by a costly stacking operation. Subsequently, it is still necessary in most cases to adjust the contact springs in order to obtain predetermined performance values.
  • the stacking and adjusting operations consume considerable time so that a compete mechanical production is not feasible.
  • a contact unit of the kind described, which can be fabricated completely mechanically and in which no subsequent adjustment is required.
  • this can be accomplished by a contact unit insertable as a carrier into and positively positioned within a tensioned U-shaped rail, such unit representing an individual part of the apparatus (preferably constructed as a switching contact) and supporting the spring carriers for the cooperating contact springs, the movable central contact spring, and the connecting terminal lugs therefor, which can be fabricated from a common metal strip, disposed in a common plane and embedded in a plate-like body of insulating material.
  • the. cooperating contact springs which extend at right angles to and fastened, preferably through spot welding, on the spring carriers, extend in prestressed condition into recesses in the plate of insulating material, forming fixed abutments.
  • the movable contact springs of the respective contact units inserted in the U-shaped rail are actuatable by a common web-shaped slide bar. Since the webs of the slide bar can be produced with close tolerances, here, too, no critical tolerances are developed.
  • the connecting lugs are provided in pairs for the respective contact springs forming the switch contact.
  • the connecting lugs can be provided with stamped longitudinal reinforcement to increase their stability for the plug-like mounting.
  • projections may be provided on the narrow side edges of the plate of insulating material for positive fastening in the tensioned U-shaped rail.
  • FIG. 1 is a perspective view of a contact according to the invention.
  • FIGS. 2a to 20 are similar figures, on a reduced scale in relation to FIG. 1, illustrating the main parts of a multiple contact relay employing contact units in accordance with the invention.
  • FIG. 1 illustrates an adjustment-free, preassembled contact unit for a relay in accordance with the invention, capable of production by mechanized operations, utilizing a switching contact as a basis for explanation.
  • a plate-like body of insulating material generally designated by the reference numeral 1
  • embedded contact elements produced from a common metal strip, comprising spring carriers 2a and 2b for the cooperable contact springs 3a and 3b, and in addition the movable central contact spring 2c which is slitted.
  • From the lower end, as viewed in FIG. 1, of the body of insulating material project terminal lugs 2d and 2d provided with longitudinal stiffening depressions stamped therein.
  • the contact elements, preferably embedded in the plate of insulating material in an injection operation lie in a single plane and can, therefore be simultaneously produced from a single metal strip.
  • the solid contact springs 3a and 3b which are constructed with offsetting bends, are disposed at right angles with respect to the spring carriers 2a and 2b, and spot welded thereto, with such contact springs being pretensioned and extending into the recesses 1a and 1b of the body plate 1, which define positive positioning abutments therefor.
  • Lateral projections 10 and 1d on the body plate I serve for the positive connection thereof Within a tensioned U-shaped sheet metal holder A, as illustrated in FIG. 2a, recesses a being provided therein for the reception of such projections.
  • the mechanized production methods possible with the contact arrangement in accordance with the invention can be such that a metal strip of spring material, whose thickness is primarily determined only by the movable central contact spring 20, is fed into a conveyor system.
  • a metal strip of spring material whose thickness is primarily determined only by the movable central contact spring 20
  • such metal strip receives the necessary configuration through punching, free cutting and stamping, to form an insert for subsequent injection molding therearound with insulating material, in which operation the metal strip inserted in the form can at the same time effect the sealing of the injection mold.
  • the movable slitted central con- O tact spring 2c is provided with double contacts, out free and prestressed by bending it downward.
  • cooperating contact springs 3a and 3b which are still interconnected in a strip, can be welded on and separated.
  • These cooperating contact springs can, by way of example, consist of a weldable spring material which carries a single layer of contact material.
  • a separating punch or stamp separates the finished contact unit either by severance of the terminal lugs 20. or the terminal lugs 2d from the strip.
  • a silver surface could be applied to both sides of the terminal lugs in a previous operation.
  • the main parts of a relay are illustrated with the contact unit in accordance with the invention, in which a desired number of contact units corresponding to the individual part B, as well as the necessary electromagnetic system corresponding to the individual part C can be inserted in apertures a in the U-shaped rail A.
  • the apertures a are arranged in a precise division on the U-shaped rail A are preferably in a predetermined divisional pattern, no cumulative tolerances can occur. This is of great importance in relays which must be provided with a large number of contacts and in which, in the conventional production methods, a time consuming adjustment for the equalization of such cumulative tolerances is necessary.
  • the webs of the slide bar D illustrated in FIG. 2c, can be produced with close tolerances, no critical tolerances are involved, and the bar may be readily assembled with the armature 11 and the free end of the central contact spring 20.
  • an adjustment-free preassembled contact structure for multiple contact relays comprising the combination of a plurality of substantially flat plate-like units of insulating material formed with four edges and two sides, a U- shaped support formed with openings, said plurality of plate-like units received with said sides in parallel planes in said U-shaped support and with two of their opposite edges attached to the U-shaped support, a plurality of contact carrier supports with connecting lugs mounted in said plate-like units, a plurality of cooperating contact springs extending at right angles to said carrier supports and mounted thereon along one of the edges of said plate-like units, a moveable central contact spring embedded in each of the plate-like units of insulating material in a plane 0 parallel to said sides, said moveable central contact spring cooperable with the contact springs, and said plate-like units formed with recesses receiving prestressed ends of the contact springs to accurately position them, to form a unitary multiple contact structure.
  • a contact structure according to claim 1 comprising a common web-shaped slide bar slidably mounted on thr contact structure and engageable with said central con tact springs to actuate them.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacture Of Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
US632287A 1966-04-26 1967-04-20 Adjustment-free preassembled contact unit for multiple contact relays which may be completely prefabricated by mechanical operations Expired - Lifetime US3420973A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1966S0103404 DE1258982C2 (de) 1966-04-26 1966-04-26 Automatisch und justierfrei fertigbare kontaktanordnung fuer vielkontaktrelais

Publications (1)

Publication Number Publication Date
US3420973A true US3420973A (en) 1969-01-07

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ID=7525142

Family Applications (1)

Application Number Title Priority Date Filing Date
US632287A Expired - Lifetime US3420973A (en) 1966-04-26 1967-04-20 Adjustment-free preassembled contact unit for multiple contact relays which may be completely prefabricated by mechanical operations

Country Status (9)

Country Link
US (1) US3420973A (mo)
AT (1) AT278149B (mo)
BE (1) BE697603A (mo)
CH (1) CH474839A (mo)
DE (1) DE1258982C2 (mo)
DK (1) DK131489B (mo)
GB (1) GB1124869A (mo)
NL (1) NL153013B (mo)
SE (1) SE327464B (mo)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3539874A (en) * 1968-01-02 1970-11-10 Gen Electric Mounting arrangement for circuit boards in indicating instruments
DE2213146A1 (de) * 1972-03-17 1973-09-20 Standard Elektrik Lorenz Ag Relais
FR2472260A1 (fr) * 1979-12-21 1981-06-26 Ericsson Telefon Ab L M Groupe de ressorts destines a un relais

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD111756A1 (mo) * 1974-03-08 1975-03-05
DE2454967C3 (de) * 1974-05-15 1981-12-24 Hans 8024 Deisenhofen Sauer Gepoltes elektromagnetisches Relais
EP0046148A1 (de) * 1980-08-16 1982-02-24 Rapa Rausch & Pausch elektrotechnische Spezialfabrik GmbH Minikompaktrelais

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2348088A (en) * 1940-11-20 1944-05-02 Ibm Detachable relay
US2665353A (en) * 1950-06-08 1954-01-05 Mcgill Mfg Company Inc Switch housing
US2838631A (en) * 1955-02-01 1958-06-10 Westinghouse Air Brake Co Electrical relays
US2959693A (en) * 1955-12-30 1960-11-08 Baldwin Piano Co Key switching system for electrical musical instruments
US3242285A (en) * 1963-03-21 1966-03-22 Guardian Electric Mfg Co Relay with unitary field piece construction
US3329791A (en) * 1965-06-01 1967-07-04 Leach Corp Integral terminal pin contact structure for relays

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2348088A (en) * 1940-11-20 1944-05-02 Ibm Detachable relay
US2665353A (en) * 1950-06-08 1954-01-05 Mcgill Mfg Company Inc Switch housing
US2838631A (en) * 1955-02-01 1958-06-10 Westinghouse Air Brake Co Electrical relays
US2959693A (en) * 1955-12-30 1960-11-08 Baldwin Piano Co Key switching system for electrical musical instruments
US3242285A (en) * 1963-03-21 1966-03-22 Guardian Electric Mfg Co Relay with unitary field piece construction
US3329791A (en) * 1965-06-01 1967-07-04 Leach Corp Integral terminal pin contact structure for relays

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3539874A (en) * 1968-01-02 1970-11-10 Gen Electric Mounting arrangement for circuit boards in indicating instruments
DE2213146A1 (de) * 1972-03-17 1973-09-20 Standard Elektrik Lorenz Ag Relais
FR2472260A1 (fr) * 1979-12-21 1981-06-26 Ericsson Telefon Ab L M Groupe de ressorts destines a un relais

Also Published As

Publication number Publication date
DK131489C (mo) 1975-12-08
NL6705164A (mo) 1967-10-27
DE1258982C2 (de) 1975-06-19
SE327464B (mo) 1970-08-24
GB1124869A (en) 1968-08-21
DK131489B (da) 1975-07-21
AT278149B (de) 1970-01-26
DE1258982B (de) 1968-01-18
CH474839A (de) 1969-06-30
BE697603A (mo) 1967-10-26
NL153013B (nl) 1977-04-15

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