US3767870A - Multiple circuit control switch with spring biased slide operating means engaging pivoted contact assembly - Google Patents

Multiple circuit control switch with spring biased slide operating means engaging pivoted contact assembly Download PDF

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Publication number
US3767870A
US3767870A US00247756A US3767870DA US3767870A US 3767870 A US3767870 A US 3767870A US 00247756 A US00247756 A US 00247756A US 3767870D A US3767870D A US 3767870DA US 3767870 A US3767870 A US 3767870A
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United States
Prior art keywords
operating element
contact
switch
double
lever arm
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Expired - Lifetime
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US00247756A
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English (en)
Inventor
E Marquardt
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F J AND MARQUARDT J
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F J AND MARQUARDT J
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
    • H01H15/02—Details
    • H01H15/06—Movable parts; Contacts mounted thereon
    • H01H15/10—Operating parts
    • H01H15/102—Operating parts comprising cam devices

Definitions

  • ABSTRACT An electric switch with a contact bridge pivotable between two end position and constructed as a doublearmed lever, at least two fixed contacts being bridged in at least one of the said end positions, wherein the pivoting range of the contact bridge contains an operating element which is displaceable between two end positions, and which in one of these latter is mainly associated with one lever arm, while in the other end position it is mainly associated with the other lever arm, and which in the zone of its end positions forms a stop device for the rotation of the lever arm in question, while the particular lever arm which is free at the time, or some element connected therewith, extends into the path of motion of the said operating element.
  • the invention relates to an electric switch with at least one rotatably or tiltably mounted contact bridge pivotable between two end positions and constructed as a double-armed lever, at least two fixed contacts being bridged in at least one of the said end positions.
  • the purpose of the present invention is to provide a switch of this kind in which over at least the operating distance no change takes place in the contact force.
  • the pivoting range of the contact bridge contains an operating element which is displaceable, in a direction approximately perpendicular to its pivoting axis, between two end positions, and which in one of these latter is mainly associated with one lever arm, while in the other end position it is mainly associated with the other lever arm, and which in the zone of its end positions forms a stop device for the rotation of the lever arm in question, while the particular lever arm which is free at the time, or some element connected therewith, extends into the path of motion of the said operating element.
  • the latter can be displaced in any desired manner from outside.
  • the operating element is resiliently pressed'against the adjacent lever arm of the contact bridge.
  • the stronger the spring provided the greater the contact force.
  • the spring acts transversally, in particular perpendicularly, to the direction in which the operating element is displaced, so that given a constant height or thickness in the latter the spring tension will not change.
  • the contact force thus remains constant until the commencement of the pivoting movement of the contact element.
  • the contact force furthermore, has no effect on the operating force.
  • the movement of the operating element need not necessarily cease with the termination of the pivoting movement of the contact bridge, and in addition to the extended preliminary motion already mentioned a follow-up distance of greater or smaller length may also be provided. During this period likewise, or to be more exact, as long as the blocking action of the operating element continues, the contact force remains constant.
  • the con- .tact bridge is provided, on the side facing towards the operating element, with a cavity which is in particular symmetrical to the axis of rotation and of which the length in the direction of displacement of the operating element corresponds approximately to the length of the latter and of which the two ends are constructed as oblique run-up surfaces.
  • a further feature of the invention is characterized by the fact that the two lever arms of the contact bridge preferably form an obtuse angle with each other and, in particular, are constructed on exactly the same lines. It is particularly in the case of reversing switches that this construction will be adopted.
  • the contact bridge is provided, on the side facing away from the operating element, with at least one and preferably two contacts or contact points symmetrical to the axis of rotation. In this connection all possible variations are conceivable, e.g., the bridging of two or more fixed contacts by one and the same lever arm or else a contact-making operation with one single contact, in which case the contact bridge has to be connected with a special terminal.
  • the two lever arms can each bear a movable contact, thus providing a means of switching over from a first to a second current circuit.
  • a number of contact bridges can naturally be switched over simultaneously by means of one and the same operating element. A particular advantage is provided by the fact that the contact bridge is constructed as a current connection.
  • the operating element is constructed as a slide to be operated from the outside or is connected with such a slide.
  • This version could also be regarded as a push-pull switch, if the prolongation of the operating element extends in its direction of motion.
  • the switch operates on the lines of a switch key.
  • the bearing of the contact bridge includes a certain clearance, at all events in the direction of motion of the operating element, so that on being switched over the contact bridge is at the same time displaced to a certain extent in the longitudinal direction, a frictional contact-making operation thus being obtained.
  • the latter is very important for the self-cleaning of the contact.
  • FIGS. 1 and 2 of the drawing provides a schematic lateral diagram of one example of the invention.
  • the switch to which the invention relates consists of a housing 1, not shown in detail, the operating element 2, a contact bridge 3 and three connecting element 4-6.
  • the latter are fixed in the usual manner in the housing 1 and their ends extending towards the outside are connected with electric conductors.
  • the two outermost connecting elements 4 and 6 bear fixed contacts 7 and 8 respectively.
  • the central connecting element is specially constructed to form a pivot bearing brass 9.
  • the bearing attachment 10 of the contact bridge 3 extends into the said bearing brass.
  • the said bridge takes the form of a double-armed lever and is symmetrical to the bearing attachment 10.
  • the two lever arms 11 and 12 form an obtuse angle 13.
  • the operating element 2 is integral with a prolongation 14 which passes through the housing to the outside and of which the free end represents the operating device of the switch. It is longitudinally displaceable in the direction shown by the double arrow 15.
  • a stirrup-shaped leaf spring of which one arm 17 rests against the housing and the other arm 18 against the upper side of the operating element 2 or of its prolongation 14 produces the necessary contact pressure between the fixed contacts 7, 8, and the movable contacts or contact points 20, 21.
  • the length 31 is excessive, the end which is to the rear as viewed in the switching direction 27 will obstruct the ascending movement and thus the pivoting of the contact bridge. If the length is made shorter than the distance between the oblique run-up surfaces 28 and 31, this produces a certain dead travel, duringwhich the spring 16 is no longer able to exert any contact pressure on the adjacent contacts. If these disadvantages are to be avoided the lengths must be accurately adapted to one another, so that as soon as the contact pressure is removed the pivoting action for switching over can immediately take place.
  • the operating element 2 with its prolongation 14 is naturally guided in the longitudinal direction but nevertheless'includes a certain transversal clearance, so that the force of the spring 16 can also take effeet as a contact pressure.
  • This spring naturally need not necessarily be provided in the form shown in the example but can be replaced by any desiredspring or springs of which the action is transversal to the displacement direction 15.
  • FIG. 2 shows an alternative version of the operating element 2, differing from that shown in FIG. 1 by the two protuberances 32 and 33. Its method of operation is essentially the same as in the first example.
  • the reversing switch shown in the example can also be used as a disconnecting switch.
  • one of the pairs of fixed contacts 7 and 8 can be dispensed with. It is also perfectly possible for the fixed contacts 7 and 8 to be replaced by electrically nonconductive stops, so that even if there are two defined end positions into which the switch can be tilted it will only operate as an on-off switch.
  • an electric switch comprising a switch housing having lower and upper walls, a central fixed electrically-conductive contact located on said lower wall and forming a pivot bearing, two outer fixed contacts located on opposite sides of central contact, a double-armed lever having a central attachment depending from said lever at the juxtaposition of said two arms, said attachment being pivotably mounted in said pivot bearing, a movable contact on the end of each said arm remote from said central attachment, an operating element within said housing and having an extension which passes through said housing to the outside thereof, the operating element and extension being longitudinally movable along their longitudinal axes, the combination further comprising a spring between said upper wall and said operating element and its extension, whereby when said operating element is moved in one direction said movable contact on one arm of said double-armed lever is urged into contact with one of said fixed contacts and when said operating element is moved in said opposite direction said movable contact on said other arm of said double-armed lever is urged into contact with said other fixed contact.

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  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Mechanisms For Operating Contacts (AREA)
US00247756A 1971-04-30 1972-04-26 Multiple circuit control switch with spring biased slide operating means engaging pivoted contact assembly Expired - Lifetime US3767870A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2121421A DE2121421C3 (de) 1971-04-30 1971-04-30 Elektrischer Schalter

Publications (1)

Publication Number Publication Date
US3767870A true US3767870A (en) 1973-10-23

Family

ID=5806515

Family Applications (1)

Application Number Title Priority Date Filing Date
US00247756A Expired - Lifetime US3767870A (en) 1971-04-30 1972-04-26 Multiple circuit control switch with spring biased slide operating means engaging pivoted contact assembly

Country Status (3)

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US (1) US3767870A (OSRAM)
DE (1) DE2121421C3 (OSRAM)
FR (1) FR2134652B1 (OSRAM)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3983341A (en) * 1975-06-03 1976-09-28 Amf Incorporated Simplified slide switch
EP1321954A1 (de) * 2001-12-20 2003-06-25 Valeo Schalter und Sensoren GmbH Schaltereinheit und Schalthebel mit Schaltereinheit
US6743997B2 (en) * 2002-08-06 2004-06-01 Lear Corporation Rocker switch

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3144740A1 (de) * 1981-11-11 1983-05-19 Max Kammerer Gmbh, 6370 Oberursel Wippschalter
US4525607A (en) * 1983-02-04 1985-06-25 Yasutaka Senoh Simplified electric switch construction
DE8320066U1 (de) * 1983-07-12 1983-12-01 Siemens AG, 1000 Berlin und 8000 München Schiebeschalter
DE4218535C1 (OSRAM) * 1992-06-05 1993-09-09 Merit-Elektrik Gmbh, 5270 Gummersbach, De

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2222765A (en) * 1937-03-02 1940-11-26 George A Brace Signal device for vehicles
US2794086A (en) * 1954-06-09 1957-05-28 Barrett Keenan Company Toggle switch construction
US2900460A (en) * 1958-03-24 1959-08-18 Essex Wire Corp Electric switch
US2909624A (en) * 1957-07-03 1959-10-20 Gen Motors Corp Circuit controller
US3221115A (en) * 1964-07-03 1965-11-30 Gen Electric Actuator cam structure for linearly operated switch
US3258549A (en) * 1964-06-24 1966-06-28 Boyne Products Inc Linearly operated, lost motion switch construction

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1073286A (en) * 1964-03-31 1967-06-21 Arrow Electric Switches Ltd Tool handle switch
US3541280A (en) * 1968-10-03 1970-11-17 Chicago Switch Inc Slide switch with rocker contact

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2222765A (en) * 1937-03-02 1940-11-26 George A Brace Signal device for vehicles
US2794086A (en) * 1954-06-09 1957-05-28 Barrett Keenan Company Toggle switch construction
US2909624A (en) * 1957-07-03 1959-10-20 Gen Motors Corp Circuit controller
US2900460A (en) * 1958-03-24 1959-08-18 Essex Wire Corp Electric switch
US3258549A (en) * 1964-06-24 1966-06-28 Boyne Products Inc Linearly operated, lost motion switch construction
US3221115A (en) * 1964-07-03 1965-11-30 Gen Electric Actuator cam structure for linearly operated switch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3983341A (en) * 1975-06-03 1976-09-28 Amf Incorporated Simplified slide switch
EP1321954A1 (de) * 2001-12-20 2003-06-25 Valeo Schalter und Sensoren GmbH Schaltereinheit und Schalthebel mit Schaltereinheit
US6743997B2 (en) * 2002-08-06 2004-06-01 Lear Corporation Rocker switch

Also Published As

Publication number Publication date
DE2121421C3 (de) 1980-08-28
FR2134652A1 (OSRAM) 1972-12-08
DE2121421B2 (de) 1974-07-04
FR2134652B1 (OSRAM) 1977-08-26
DE2121421A1 (de) 1972-11-02

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