US3778575A - Circuit control switch with contact bridge spring biased towards fixed contact - Google Patents

Circuit control switch with contact bridge spring biased towards fixed contact Download PDF

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Publication number
US3778575A
US3778575A US00259405A US3778575DA US3778575A US 3778575 A US3778575 A US 3778575A US 00259405 A US00259405 A US 00259405A US 3778575D A US3778575D A US 3778575DA US 3778575 A US3778575 A US 3778575A
Authority
US
United States
Prior art keywords
arm
contact
contact bridge
thrust member
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
US00259405A
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English (en)
Inventor
F Prestel
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.)
J&J Marquardt KG
Original Assignee
J&J Marquardt KG
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
Priority claimed from DE19712129823 external-priority patent/DE2129823C3/de
Application filed by J&J Marquardt KG filed Critical J&J Marquardt KG
Application granted granted Critical
Publication of US3778575A publication Critical patent/US3778575A/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
    • 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

Definitions

  • the contact bridge is provided with one or a plurality of mutually parallel supporting lugs extending in the direction of the other angle arm and through which the contact bridge is, particularly in the region of the angle corner, supported on a tilting and sliding plane and a face or edge of the supporting lug which is directed towards the free end of I one angle arm is pressed against a fixed abutment.
  • the spring of which the point of engagementon the contact bridge is at a distance from its supporting point exerts a constant moment in the direction of the fixed contact or contacts.
  • the other angle arm is pressed by the same moved passed this cam, a relative rotation or pivoting of both parts occurring at the same time.
  • a further development of the invention is characterised in that, upon the switch-over process, viewed in the direction of displacement of the pivoting member, there is in front of the thrust bearing or one sliding cam on one angle arm of the pivoting member, also a second sliding cam or the like, the plate-shaped part of the pivoting member, in the switched-over position, at least resting onthis second cam. Via the latter or via both sliding cams, one angle arm is held down in the extreme switched-over position while the movable contact is pressed by the spring firmly against the fixed contacts which are to be bridged.
  • the spring is expediently constructed as a thrust spring, particularly a coiled thrust spring, and moreover, it bears on that side of the plane plate-like part of the pivoting member which is remote from the contact bridge, the edge of the plate being at least partly bent over to form'a spring retaining strip.
  • the spring retaining strip prevents a lateral movement of the end of the spring or of the entire spring which bears on the plate- I like part, where this is not prevented by the casing or moment against the thrust member. It cannot perform a pivoting movement until the thrust member is displaced by some external action. In doingso, then, also I the movablecontact draws close to the fixed contact or contacts.
  • the contact bridge may be tiltably-mounted on a fixed contact, so that the electrical connection only has to be established with one contact which is in the same circuit, but yet another form of embodiment is conceivable, whereby the contact bridge particularly one arm thereof, at the end of a pivoting movement strikes the two fixed contacts which belongto the circuit which is to be closed.
  • a plurality of pairs of contacts may be simultaneously bridged by a correspondingly constructed contact bridge.
  • a further development of the invention is characterised in that the spring bears on the one hand indirectly through a pivoting member on that side of one angle arm which is remote from the fixed contacts, at a distance from the contact bridge pivoting point, and rests on the other on the thrust member.
  • the switch When the switch is operated, it is as a whole displaced in relation to one arm of the contact bridge, but in all positions of displacement, it exerts constantly and in the same direction torque on the contact bridge and, moreover, in the extreme switched-over position, it ensures the necessary contact pressure.
  • one angle arm is constructed as a thrust bearing for the pivoting member or as a sliding cam, or is provided with such a means, so that the part of the pivoting member which rests on it is of plate-like construction.
  • the plate is the thrust member. Therefore, in order to rule out any misunderstandings, the rim is bent over towards this end of the spring.
  • a further feature of the invention is characterised in that the articulated end of the pivoting member is of hook-like construction and at least partly comprises a stud, web or the like of the thrust member. Accord ingly, it can be easily fitted and removed and, furthermore, manufacture of the switch is at least to this extent very competitively costed.
  • the supporting lug or lugs In order to achieve a certain self-cleaning effect, it is very expedient for the supporting lug or lugs to be slightly displaceable in the direction of thrust member movement. Just a few fractions of a millimetre are sufficient to ensure a good action.
  • a thrust member 2 Displaceably mounted in the switch housing 1, in the direction of the double-headed arrow 3, is a thrust member 2.
  • An integrally moulded stud or web 4 on the thrust member 2 is, for the rotatable mounting of a pivoting member 5, enclosed by the hook-shaped end 6 thereof, on the outwardly-directed semi-cylindrical surface.
  • One end 8 of a coil thrust spring 9, the other end of which is maintained in a recess 11 in the thrust member 2 bears on the plate-like part 7 of the pivoting member 5.
  • a first cam 15 of the contact bridge 16 bears on the opposite face 12 of the plate-like part 7 of the pivoting member 5, the said face 12 being directed towards the fixed contacts 13, 14.
  • the contact bridge 16 is of substantially angular form, one arm 17 of the angle carrying the movable contact 18 at its free end and the free outwardly bentover end 19 of the other angle arm 20 being applied with pressure on the rounded (and in the direction of the switching operation 22) rear corner of the thrust member 2.
  • one angle arm 17 is at an acute angle to an imaginary line connecting the two fixed contacts l3, 14. It has a convex contact 28 which bears on the plane surface of the fixed contact 13 which is formed from an angle.
  • the two bushes 29, 30 accommodate the conductor ends which have to be bridged by means of the switch according to the invention. They are gripped by the two screws 31, 32.
  • the thrust member 2 can be operated by hand or by means of a device or machine. Furthermore, it is conceivable to equip the switch with several ,contact bridges located parallel with one another, the
  • the spring 9 exerts a steady moment in the direction of the arrow 33 on the contact bridge- 16. However, it cannot rotate so long as the thrust member 2 is stationary, since the free end 19 of the other arm 20 of the contact bridge 16 is prevented from rotating by the corner 21 of the thrust member.
  • the plate-like part 7 of the pivoting member 5 bears both on the first cam 15 as well as on the second cam 35 of the contact bridge 16, which, viewed in the direction of actuation 22, is located in front of the first cam 15.
  • Both cams are 3 formed by a zig-zag bending of one arm 17 of the contact bridge 16.
  • the distance between the two cams 15 and. 35 is equal to the length of the plate-like part 7 or may be somewhat smaller, so that this part 7 can rest on both at the same time. in special cases, a further movement of the thrust member in the direction of the arrow 22 is conceivable, so that the plate-like part 7 then rests only on the second cam 35.
  • an electric switch comprising a switch housing, two fixed contacts within said housing, a thrust member movable between first and second positions in said housing, a pivoting member pivotably mounted on said thrust member, a spring carried by said thrust member and biassing said pivoting member, and a contact bridge mounted in said housing between said pivoting member and said fixed contacts, said contact bridge comprising a first arm, a first bridge contact carried by said first arm, a second arm engaging said thrust member, a supporting lug extending in the opposite direction to said second arm and engaging a tilting and sliding plane adjacent its end remote from said second arm, and a second bridge contact adjacent said lug, whereby when said thrust member is in one of said positions it holds said second arm in a position against the action of said spring so that said first bridge contact on said first arm cannot engage either of said fixed contacts and when said thrust member is in the other of said positions it allows said spring to urge said first bridge contact into engagement with one of said fixed contacts.

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  • Push-Button Switches (AREA)
US00259405A 1971-06-16 1972-06-05 Circuit control switch with contact bridge spring biased towards fixed contact Expired - Lifetime US3778575A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712129823 DE2129823C3 (de) 1971-06-16 Elektrischer Schalter

Publications (1)

Publication Number Publication Date
US3778575A true US3778575A (en) 1973-12-11

Family

ID=5810913

Family Applications (1)

Application Number Title Priority Date Filing Date
US00259405A Expired - Lifetime US3778575A (en) 1971-06-16 1972-06-05 Circuit control switch with contact bridge spring biased towards fixed contact

Country Status (4)

Country Link
US (1) US3778575A (it)
DE (1) DE7123183U (it)
GB (1) GB1364168A (it)
IT (1) IT960581B (it)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1878255A (en) * 1929-03-06 1932-09-20 Wolfe Archie Rexald Electric socket switch
US3222473A (en) * 1961-03-06 1965-12-07 Jose H Delhase Combined switch and closure means
GB1018357A (en) * 1963-11-16 1966-01-26 Rau Swf Autozubehoer Improvements in switches for direction indicators of mechanically propelled vehicles
US3249725A (en) * 1963-05-23 1966-05-03 Gen Electric Electric switch with pressure lock terminals

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1878255A (en) * 1929-03-06 1932-09-20 Wolfe Archie Rexald Electric socket switch
US3222473A (en) * 1961-03-06 1965-12-07 Jose H Delhase Combined switch and closure means
US3249725A (en) * 1963-05-23 1966-05-03 Gen Electric Electric switch with pressure lock terminals
GB1018357A (en) * 1963-11-16 1966-01-26 Rau Swf Autozubehoer Improvements in switches for direction indicators of mechanically propelled vehicles

Also Published As

Publication number Publication date
DE2129823B2 (de) 1975-09-18
DE2129823A1 (de) 1972-12-21
IT960581B (it) 1973-11-30
GB1364168A (en) 1974-08-21
DE7123183U (de) 1976-08-12

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