US2986621A - Switch contact assemblies - Google Patents

Switch contact assemblies Download PDF

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Publication number
US2986621A
US2986621A US811145A US81114559A US2986621A US 2986621 A US2986621 A US 2986621A US 811145 A US811145 A US 811145A US 81114559 A US81114559 A US 81114559A US 2986621 A US2986621 A US 2986621A
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layers
contact strips
switch contact
projections
another
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US811145A
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Midgley Frank
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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
    • H01H63/00—Details of electrically-operated selector switches
    • H01H63/02—Contacts; Wipers; Connections thereto
    • H01H63/06—Contact banks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S200/00—Electricity: circuit makers and breakers
    • Y10S200/46—Separators and/or insulators for stacked leaf spring contacts

Definitions

  • This invention relates to switch contact assemblies of the kind wherein the switch contacts in the form of resilient strips are located between layers of electrically insulated material which are clamped together, and has been devised with a view to expediting and facilitating the fabrication of such assemblies.
  • each insulating layer is formed on one side with a series of projections and on the other side with a series of complementary recesses, the contact strips being shaped so as to be positively located between adjacent projections in the same layer.
  • each insulating layer 1 is formed with a series of longitudinally arranged perforations 2 adapted to receive bolts 3 for clamping a number of such layers together.
  • Each such perforation which extends through the layer, is encircled on one side of the latter by a projecting annulus 4 and on the other side by a complementary recess 5 and when a plurality of the layers are stacked upon one another these projections 4 and recesses 5 are engaged with one another to lock the assembly together.
  • the switch contact strips 6 have arcuate or semicircular indentations 7 in their respective side edges and these indentations engage respectively with two adjacent annular projections 4 in the same layer so that the contact strip 6 is positively located.
  • the thickness of the con tact strips 6 is less than the depth of the annular projections or recesses so that when the layers are stacked upon one another and clamped together by means of bolts 3, or the equivalent, passed through some or each of the aligned perforations, the contact strips are firmly held between adjacent layers 1.
  • the topmost insulating layer 8 is not formed with projections and recesses like the others but instead has openings 9 which can slide upon the annular projections 4 of the adjacent insulating layer.
  • the drawing also shows a washer 10 which threads on the bolt and is clamped against the top layer 8 by a nut 11.
  • Switch contact assembly comprising a plurality of contact strips disposed between layers of insulating material, each of said insulating layers being formed on one side with a plurality of circular projections, and on the 2,986,621 Patented May 30, 1961 other side with a plurality of complementary recesses, and each of said contact strips having part circular notches in their side edges which engage respectively with two of said circular projections which are disposed adjacent to one another in the same insulating layer whereby the contact strips in the assembly are positively located in alignment with one another by the circular projections on said insulating layers.
  • Switch contact assembly comprising a plurality of contact strips interleaved between layers of insulating material, each of said insulating layers being provided with a plurality of apertures, and being formed on one side with a plurality of annular projections surrounding said apertures, and on the other side with a plurality of complementary recesses, and each of said contact strips having part circular notches in their side edges engaging respectively with two of said annular projections which are disposed adjacent to one another in the same insulating layer whereby the contact strips in the assembly are positively located in alignment with one another by the annular projections on said insulating layers.
  • Switch contact assembly comprising a plurality of contact strips interleaved between layers of insulating material, each of said layers being provided with a plurality of apertures for receiving clamping members for securing the insulating layers together, and being formed on one side with a plurality of annular projections surrounding said apertures, and on the other side with a plurality of complementary recesses, and each of said contact strips having part circular notches in their side edges engaging respectively with two of said annular projections which are disposed adjacent to one another in the same insulating layer whereby the contact strips in the assembly are positively located in alignment with one another by the annular projections on said insulating layers.
  • Switch contact assembly comprising a plurality of contact strips interleaved between layers of insulating material, each of said insulating layers being provided with a plurality of apertures and being formed on one side with a plurality of annular projections surrounding said apertures, and on the other side with a plurality of complementary recesses also surrounding said apertures, a plurality of clamping bolts passing through said apertures for securing said insulating layers and said contact strips together into an assembly, and each of said contact strips having semi-circular notches in their side edges engaging respectively with two of said annular projections which are disposed adjacent to one another in the same insulating layer whereby the contact strips in the assembly are positively located in alignment with one another by the annular projections on said insulating layers.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Push-Button Switches (AREA)

Description

May 30, 1961 F. MIDGLEY swrrcn CONTACT ASSEMBLIES Filed May 5, 1959 United States Patent Office SWITCH CONTACT ASSEMBLIES Frank Midgley, Tintern Court, St. Georges Hill, Weybridge, England Filed May 5, 1959, Ser. No. 811,145
Claims priority, application Great Britain May 9, 1958 4 Claims. (Cl. 200-166) This invention relates to switch contact assemblies of the kind wherein the switch contacts in the form of resilient strips are located between layers of electrically insulated material which are clamped together, and has been devised with a view to expediting and facilitating the fabrication of such assemblies.
According to the present invention, in a switch contact assembly of this kind each insulating layer is formed on one side with a series of projections and on the other side with a series of complementary recesses, the contact strips being shaped so as to be positively located between adjacent projections in the same layer.
Conveniently and in a preferred form of the invention, which is illustrated in the accompanying part fragmentary perspective drawing, each insulating layer 1 is formed with a series of longitudinally arranged perforations 2 adapted to receive bolts 3 for clamping a number of such layers together. Each such perforation, which extends through the layer, is encircled on one side of the latter by a projecting annulus 4 and on the other side by a complementary recess 5 and when a plurality of the layers are stacked upon one another these projections 4 and recesses 5 are engaged with one another to lock the assembly together.
The switch contact strips 6 have arcuate or semicircular indentations 7 in their respective side edges and these indentations engage respectively with two adjacent annular projections 4 in the same layer so that the contact strip 6 is positively located. The thickness of the con tact strips 6 is less than the depth of the annular projections or recesses so that when the layers are stacked upon one another and clamped together by means of bolts 3, or the equivalent, passed through some or each of the aligned perforations, the contact strips are firmly held between adjacent layers 1.
The topmost insulating layer 8 is not formed with projections and recesses like the others but instead has openings 9 which can slide upon the annular projections 4 of the adjacent insulating layer. The drawing also shows a washer 10 which threads on the bolt and is clamped against the top layer 8 by a nut 11.
By use of insulating layers and metallic contact strips as above described, banks of switch contacts may easily and quickly be fabricated to suit any particular switching circuit requirements, whilst ensuring that the contact strips are positively held in their required positions.
I claim:
1. Switch contact assembly comprising a plurality of contact strips disposed between layers of insulating material, each of said insulating layers being formed on one side with a plurality of circular projections, and on the 2,986,621 Patented May 30, 1961 other side with a plurality of complementary recesses, and each of said contact strips having part circular notches in their side edges which engage respectively with two of said circular projections which are disposed adjacent to one another in the same insulating layer whereby the contact strips in the assembly are positively located in alignment with one another by the circular projections on said insulating layers.
2. Switch contact assembly comprising a plurality of contact strips interleaved between layers of insulating material, each of said insulating layers being provided with a plurality of apertures, and being formed on one side with a plurality of annular projections surrounding said apertures, and on the other side with a plurality of complementary recesses, and each of said contact strips having part circular notches in their side edges engaging respectively with two of said annular projections which are disposed adjacent to one another in the same insulating layer whereby the contact strips in the assembly are positively located in alignment with one another by the annular projections on said insulating layers.
3. Switch contact assembly comprising a plurality of contact strips interleaved between layers of insulating material, each of said layers being provided with a plurality of apertures for receiving clamping members for securing the insulating layers together, and being formed on one side with a plurality of annular projections surrounding said apertures, and on the other side with a plurality of complementary recesses, and each of said contact strips having part circular notches in their side edges engaging respectively with two of said annular projections which are disposed adjacent to one another in the same insulating layer whereby the contact strips in the assembly are positively located in alignment with one another by the annular projections on said insulating layers.
4. Switch contact assembly comprising a plurality of contact strips interleaved between layers of insulating material, each of said insulating layers being provided with a plurality of apertures and being formed on one side with a plurality of annular projections surrounding said apertures, and on the other side with a plurality of complementary recesses also surrounding said apertures, a plurality of clamping bolts passing through said apertures for securing said insulating layers and said contact strips together into an assembly, and each of said contact strips having semi-circular notches in their side edges engaging respectively with two of said annular projections which are disposed adjacent to one another in the same insulating layer whereby the contact strips in the assembly are positively located in alignment with one another by the annular projections on said insulating layers.
References Cited in the file of this patent UNITED STATES PATENTS 2,500,413 Horlacher Mar. 14, 1950 2,575,806 Graybill et a1. Nov. 21, 1951 2,765,381 Smith Oct. 2, 1956 2,838,631 Hufnagel June 10, 1958 FOREIGN PATENTS 692,074 Germany June 12, 1940 58,807 Netherlands Ian. 15, 1947 1,134,894 France Dec. 10, 1956
US811145A 1958-05-09 1959-05-05 Switch contact assemblies Expired - Lifetime US2986621A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB14873/58A GB866167A (en) 1958-05-09 1958-05-09 Improvements relating to switch contact assemblies

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US2986621A true US2986621A (en) 1961-05-30

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126466A (en) * 1964-03-24 Modular leaf switch
US3223809A (en) * 1963-11-04 1965-12-14 Portage Electric Prod Inc Mounting contact strip means for thermostatic switches
US3226508A (en) * 1962-11-14 1965-12-28 Electronic Controls Inc Electrical switch device
US3252206A (en) * 1962-07-09 1966-05-24 Molding Engineers Inc Method of molding and forming a switch device
US3548366A (en) * 1967-08-16 1970-12-15 Thomas & Betts Corp Modular terminal connector block
DE1515640B1 (en) * 1961-10-20 1971-01-07 Electronic Controls Inc Multiple compact switches or relays
US3573414A (en) * 1969-04-14 1971-04-06 Western Electric Co Switch pile-ups
US4154499A (en) * 1974-04-11 1979-05-15 Weber Franz K Electrical connector and method of making
FR2453583A1 (en) * 1979-03-31 1980-10-31 Ferranti Ltd CONNECTION CIRCUIT WITH MODULAR ELEMENTS
US4806104A (en) * 1988-02-09 1989-02-21 Itt Corporation High density connector
US5057026A (en) * 1989-02-16 1991-10-15 Yazaki Corporation Electric junction box
WO2008107765A1 (en) * 2007-03-02 2008-09-12 Giachetti Loris S.R.L. Electrical connection equipment

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE692074C (en) * 1937-11-17 1940-06-12 Dietz & Ritter G M B H Dr Electrical contact strip
NL58807C (en) * 1930-10-27 1947-01-16 Comp Generale Electricite
US2500413A (en) * 1945-11-26 1950-03-14 Clare & Co C P Gang relay switch arrangement
US2575806A (en) * 1950-02-16 1951-11-20 Automatic Elect Lab Contact bank for 25-point 10-wiper rotary switches
US2765381A (en) * 1954-04-21 1956-10-02 Siemens Brothers & Co Ltd Contact spring assemblies
FR1134894A (en) * 1954-08-19 1957-04-18 Aircraft Marine Products Multiple connections
US2838631A (en) * 1955-02-01 1958-06-10 Westinghouse Air Brake Co Electrical relays

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL58807C (en) * 1930-10-27 1947-01-16 Comp Generale Electricite
DE692074C (en) * 1937-11-17 1940-06-12 Dietz & Ritter G M B H Dr Electrical contact strip
US2500413A (en) * 1945-11-26 1950-03-14 Clare & Co C P Gang relay switch arrangement
US2575806A (en) * 1950-02-16 1951-11-20 Automatic Elect Lab Contact bank for 25-point 10-wiper rotary switches
US2765381A (en) * 1954-04-21 1956-10-02 Siemens Brothers & Co Ltd Contact spring assemblies
FR1134894A (en) * 1954-08-19 1957-04-18 Aircraft Marine Products Multiple connections
US2838631A (en) * 1955-02-01 1958-06-10 Westinghouse Air Brake Co Electrical relays

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126466A (en) * 1964-03-24 Modular leaf switch
DE1515640B1 (en) * 1961-10-20 1971-01-07 Electronic Controls Inc Multiple compact switches or relays
US3252206A (en) * 1962-07-09 1966-05-24 Molding Engineers Inc Method of molding and forming a switch device
US3226508A (en) * 1962-11-14 1965-12-28 Electronic Controls Inc Electrical switch device
US3223809A (en) * 1963-11-04 1965-12-14 Portage Electric Prod Inc Mounting contact strip means for thermostatic switches
US3548366A (en) * 1967-08-16 1970-12-15 Thomas & Betts Corp Modular terminal connector block
US3573414A (en) * 1969-04-14 1971-04-06 Western Electric Co Switch pile-ups
US4154499A (en) * 1974-04-11 1979-05-15 Weber Franz K Electrical connector and method of making
FR2453583A1 (en) * 1979-03-31 1980-10-31 Ferranti Ltd CONNECTION CIRCUIT WITH MODULAR ELEMENTS
US4366527A (en) * 1979-03-31 1982-12-28 Ferranti Limited Circuit assemblies each with a connector having an insulating block with two separable stacked parts
US4806104A (en) * 1988-02-09 1989-02-21 Itt Corporation High density connector
US5057026A (en) * 1989-02-16 1991-10-15 Yazaki Corporation Electric junction box
WO2008107765A1 (en) * 2007-03-02 2008-09-12 Giachetti Loris S.R.L. Electrical connection equipment

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Publication number Publication date
GB866167A (en) 1961-04-26

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