US3649946A - Electric contact devices - Google Patents

Electric contact devices Download PDF

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Publication number
US3649946A
US3649946A US109518A US3649946DA US3649946A US 3649946 A US3649946 A US 3649946A US 109518 A US109518 A US 109518A US 3649946D A US3649946D A US 3649946DA US 3649946 A US3649946 A US 3649946A
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US
United States
Prior art keywords
strip
contact
parts
holder
rod
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
US109518A
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English (en)
Inventor
Egbertus Adrianus Frowein
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.)
COQ NV
Original Assignee
COQ NV
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 COQ NV filed Critical COQ NV
Application granted granted Critical
Publication of US3649946A publication Critical patent/US3649946A/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
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/38—Plug-and-socket contacts

Definitions

  • ABSTRACT Electric contact device for the pennanent connection between relatively movable conducting members, said device consisting of a rod-shaped conductor, a contact holder surrounding said conductor with ample clearance and a zigzag folded metal contact strip bent in the shape of a ring and provided in the annular gap between said conductor and said holder, the parts of said strip extending between the folds thereof being all bent in the same direction.
  • the invention relates to an electric contact device for the permanent electrically conductive connection between a metal contact holder provided with a round opening and a conductive metal rod extending centrally with ample clearance through the opening of said holder and having a round cross-sectional area, in which said contact holder and said rod are mounted for relative movement and a zigzag folded metal contact strip bent in the shape of a closed ring is clamped in the annular space left between said holder and said rod.
  • the invention aims to provide a contact device of the meant kind, in which the possibility of a deformation of the contact strip affecting the conduction of the current at relative movement of the rod and the contact holder is reduced to a minimum.
  • this is achieved in that the parts of the contact strip extending between the folds thereof are all bent in the same direction in places between their ends and consist each of a shorter and a longer portion extending from the bend, in which contact strip parts, of which the shorter portion extends between the bend and the contact holder and the longer portion extends between the bend and the rod, alternate with parts, of which the longer portion extends between the bend and the contact holder and the shorter portion extends between the bend and the rod.
  • the contact strip provided with bent parts has the advantage that, when strong currents, say short circuit currents, are conducted said parts try to stretch themselves, so that the contact pressure between the contact strip and the contact holder and that between said strip and the rod is increased and as a result thereof the transition resistance is decreased.
  • contact devices in which a circular row of individual bent contact plates are provided between the contact holder and the rod-shaped conductor. These plates must be, in the place of their bend, either supported by an individual ring or interconnected by interengaging portions in order to form together a closed ring which is rigid in the places of the bend. These known contact devices are complicated and difficult to assemble.
  • the rigidity of the contact strip of the contact device according to the invention can be appreciably increased when of each part of said strip the shorter portion extending from the bend comes to lie against the longer portion extending from the bend of the following part of said strip. In that case the parts support each other.
  • the effect of the bent parts of the contact strip can be further increased when the portions extending from the bend of each part of the contact strip enclose an angle of about It is advantageous to use for a contact device provided with a rotatable rod a contact strip, of which the parts join each other at least at their one ends by means of tubularly bent portions. This construction has also advantages for other contact devices, e.g., for contact devices having axially movable rodshaped conductors, since the contact places are better cooled.
  • the contact strip scratches the rod or the contact holder and thereby is taken along in the direction of movement, so that the contact strip is unfavorably deformed
  • different measures may be taken.
  • the parts of the contact strip may join each other at least at their one ends in a sharp fold and the end portions of said fold may be bent out of the plane of the strip.
  • the strip may have a dumbbell-shaped or a bulging cross-sectional profile. All these embodiments prevent that the contact strip contacts the rodshaped conductor or the contact holder with sharp corners.
  • FIG. 1 is partially an axial cross-sectional view, partially an elevational view of a part of a switching rod and a stationary contact holder of a switch, in which said contact holder is in permanent electric connection with said rod,
  • FIG. 2 is, on a larger scale, a cross-sectional view taken on the line II-II in FIG. 1,
  • FIG. 3 is, on a still larger scale, a plan view of a part of a contact strip for the contact device shown in FIG. 1,
  • FIG. 4 is a plan view of a variant of the contact strip shown in FIG. 3,
  • FIG. 5 is a perspective view of a part of a second variant of that contact strip
  • FIG. 6 is a perspective view of a portion of a third variant of said contact strip
  • FIG. 7 is a perspective view of a part of a fourth variant of the said contact strip and FIG. 8 is a perspective view of a part of a fifth variant of said contact strip.
  • FIGS. 1 and 2 an axially movable switching rod of an electric switch of great power is designated by 1.
  • a stationary contact device which consists of an annular metal contact holder 2 and a contact strip 3 supported by said holder.
  • the contact strip 3 is formed from a straight metal strip which is first folded in zigzag and thereafter locally bent at 4 through an angle of 90 or about 90 in each one of its parts. Thereupon the strip is bent in the shape ofa closed ring which is clamped between the switching rod 1 and the contact holder 2. It appears from FIG.
  • each part of the contact strip 3 consist of a shorter portion 3a and a longer portion 312 extending both from the bend 4 and also that each part lies with its shorter portion 30 against the longer portion 3b of the following part and with its longer portion 3b against the shorter portion 3a of the preceding part. Consequently, parts of which the shorter portion 30 extends between the bend 4 and the contact holder 2 and the longer portion 3b extends between the bend 4 and the switching rod 1, alternate with parts, of which the longer portion 3b extends between the bend 4 and the contact holder 2 and the shorter portion 30 extends between the bend 4 and the switching rod 1.
  • An electric contact device for the permanent electrically conductive connection between two relatively movable conductors, said device comprising a metal contact holder having a round opening, a metal rod having a round cross-sectional area and extending centrally with ample clearance through the opening of said holder and a zigzag folded metal contact strip bent in the shape of a closed ring, said contact strip being clamped in the annular space left between said holder and said rod, all parts of the zigzag folded strip being bent in the same direction in places between the folds of said strip and consisting each of a shorter and a longer portion extending from the bend and strip parts, of which the shorter portions extend between the bends of said parts and the contact holder and the longer portions extend between said bends and the rod, alter nating in said strip with strip parts, of which the longer portions extend between the bends of said parts and the contact holder and the shorter portions extend between said bends and the rod.
  • An electric contact device as claimed in claim 1 in which the two portions extending from the bend of each part of the contact strip enclose an angle of about 4.
  • An electric contact device as claimed in ciaim 1 in which the parts of the zigzag folded strip join each other in pairs at least at their one ends in sharp folds and the end portions of said folds are bent out of the plane of the strip 6.
  • An electric contact device as claimed in claim I in which the parts of the zigzag folded strip join each other in pairs at least at their one ends in sharp folds and said folds have each a convex shape in the plane of the strip.

Landscapes

  • Contacts (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
US109518A 1970-02-05 1971-01-25 Electric contact devices Expired - Lifetime US3649946A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7001611A NL7001611A (fr) 1970-02-05 1970-02-05

Publications (1)

Publication Number Publication Date
US3649946A true US3649946A (en) 1972-03-14

Family

ID=19809250

Family Applications (1)

Application Number Title Priority Date Filing Date
US109518A Expired - Lifetime US3649946A (en) 1970-02-05 1971-01-25 Electric contact devices

Country Status (8)

Country Link
US (1) US3649946A (fr)
JP (1) JPS5115220B1 (fr)
AT (1) AT300072B (fr)
BE (1) BE762098A (fr)
DE (1) DE2036137B2 (fr)
FR (1) FR2078260A5 (fr)
GB (1) GB1287538A (fr)
NL (1) NL7001611A (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3793606A (en) * 1973-01-02 1974-02-19 Ite Imperial Corp Squeeze coil spring and current transfer means
US3891291A (en) * 1974-02-05 1975-06-24 Wiggins Inc E B Tubing coupling incorporating bridging conductor
US4502746A (en) * 1981-03-26 1985-03-05 Daimler-Benz Aktiengesellschaft Electrically conducting connector for mutually rotatable components
US4684180A (en) * 1985-02-06 1987-08-04 Atomic Energy Of Canada Limited Sliding electric contacts
US20060084306A1 (en) * 2004-10-15 2006-04-20 Delphi Technologies, Inc. Non-reversing short tape coil device
US20130035003A1 (en) * 2010-04-14 2013-02-07 Erich Frank Electrical plug-in connector element and plug-in connector part comprising a plurality of plug-in connector elements
US9225082B2 (en) 2010-04-14 2015-12-29 Pfisterer Kontaktsysteme Gmbh Device for electrically connecting a cable, in particular a plug-in connector part

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5347028A (en) * 1976-10-12 1978-04-27 Masakazu Kitagawa Fluid opening and closing valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1893098A (en) * 1930-03-22 1933-01-03 William A Murray Spring Compan Spring seat
GB774419A (en) * 1954-09-20 1957-05-08 Marconi Instruments Ltd Improvements in or relating to screening arrangements for radio and other high frequency apparatus
US3171887A (en) * 1963-01-16 1965-03-02 Pyle National Co Shielding and sealing gasket construction

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1893098A (en) * 1930-03-22 1933-01-03 William A Murray Spring Compan Spring seat
GB774419A (en) * 1954-09-20 1957-05-08 Marconi Instruments Ltd Improvements in or relating to screening arrangements for radio and other high frequency apparatus
US3171887A (en) * 1963-01-16 1965-03-02 Pyle National Co Shielding and sealing gasket construction

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3793606A (en) * 1973-01-02 1974-02-19 Ite Imperial Corp Squeeze coil spring and current transfer means
US3891291A (en) * 1974-02-05 1975-06-24 Wiggins Inc E B Tubing coupling incorporating bridging conductor
US4502746A (en) * 1981-03-26 1985-03-05 Daimler-Benz Aktiengesellschaft Electrically conducting connector for mutually rotatable components
US4684180A (en) * 1985-02-06 1987-08-04 Atomic Energy Of Canada Limited Sliding electric contacts
US20060084306A1 (en) * 2004-10-15 2006-04-20 Delphi Technologies, Inc. Non-reversing short tape coil device
US7192293B2 (en) 2004-10-15 2007-03-20 Delphi Technologies, Inc. Non-reversing short tape coil device
US20130035003A1 (en) * 2010-04-14 2013-02-07 Erich Frank Electrical plug-in connector element and plug-in connector part comprising a plurality of plug-in connector elements
US9004955B2 (en) * 2010-04-14 2015-04-14 Pfisterer Kontaktsyteme GmbH Electrical plug-in connector element and plug-in connector part comprising a plurality of plug-in connector elements
US9225082B2 (en) 2010-04-14 2015-12-29 Pfisterer Kontaktsysteme Gmbh Device for electrically connecting a cable, in particular a plug-in connector part

Also Published As

Publication number Publication date
BE762098A (fr) 1971-07-01
DE2036137A1 (de) 1971-08-19
DE2036137B2 (de) 1971-11-25
GB1287538A (en) 1972-08-31
NL7001611A (fr) 1971-08-09
JPS5115220B1 (fr) 1976-05-15
AT300072B (de) 1972-07-10
FR2078260A5 (fr) 1971-11-05

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