US3655933A - Electrical switches - Google Patents

Electrical switches Download PDF

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Publication number
US3655933A
US3655933A US55024A US3655933DA US3655933A US 3655933 A US3655933 A US 3655933A US 55024 A US55024 A US 55024A US 3655933D A US3655933D A US 3655933DA US 3655933 A US3655933 A US 3655933A
Authority
US
United States
Prior art keywords
contacts
contact
switch
movable
pair
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
US55024A
Other languages
English (en)
Inventor
Peter Watson Leighton
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
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 Lucas Industries Ltd filed Critical Lucas Industries Ltd
Application granted granted Critical
Publication of US3655933A publication Critical patent/US3655933A/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
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/64—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member wherein the switch has more than two electrically distinguishable positions, e.g. multi-position push-button switches
    • H01H13/66—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member wherein the switch has more than two electrically distinguishable positions, e.g. multi-position push-button switches the operating member having only two positions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/14—Operating parts, e.g. push-button
    • H01H13/18—Operating parts, e.g. push-button adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
    • H01H13/183—Operating parts, e.g. push-button adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift for actuation by moving a closing member, e.g. door, cover

Definitions

  • An electrical switch includes a pair of fixed contacts, an operating member movable relative to the fixed contacts, and a pair of movable contacts carried by the operating member and engageable with the fixed contacts respectively in an operative position of the switch, one of said four contacts being capable of movement when engaged by its respective mating contact and being arranged to be engaged by its respective mating contact fractionally before the remaining pair of contacts mate, so that both movable contacts can be engaged with their respective fixed contacts in the operative position of the switch.
  • a switch includes a pair of fixed contacts, an operating member movable relative to the fixed contacts, and a pair of movable contacts carried by the operating member and engageable with the fixed contacts respectively in an operative position of the switch, one of said four contacts being capable of movement when engaged by its respective mating contact and being arranged to be engaged by its respective mating contact fractionally before the remaining pair of contacts mate, so. that both movable contacts can be engaged with their respective fixed contacts in said operative position.
  • the switch includes a U-shaped sheet metal frame 11, one limb 12 of which has a metal mounting bracket 13 welded thereto.
  • the other limb 14 of the frame 11 carries a molded synthetic resin member 15, and secured to the member 15 by means of a conductive rivet 16 is a blade terminal 17.
  • the rivet 16 serves to secure the member 15 to the limb 14, and one head 18 of the rivet 16 abuts against the terminal 17 and constitutes an electrical contact.
  • the limbs 12, 14 of the frame 11, the bracket 13, and the member 15 are formed with axially aligned holes, within which is slidably mounted a synthetic resin spindle 19.
  • One end 21 of the spindle 19 projects from the face of the limb 14 remote from the limb 12 and secured to the end 21 of the spindle 19 by means of a screw 22 is a synthetic resin sleeve 23.
  • the end of the sleeve 23 remote from the spindle 19 is formed with a radially extending shoulder 24, and trapped against the shoulder 24 by the head of the screw 22 is the blade terminal 25.
  • Integral with the blade terminal 25 and extending towards the limb 14 of the frame 11 is a contact 26, and welded to the limb 14 adjacent the contact 26 is a contact 27.
  • the sleeve 23 At its end adjacent the spindle 19 the sleeve 23 is formed with an integral, outwardly extending peripheral flange 28, the face of which remote from the spindle 19 is chamfered so that the thickness of the flange 28 decreases towards its periphery.
  • Nonrotatably mounted on the sleeve 23 between the flange 28 and the terminal 25 is a further blade terminal 29, the blade terminal 29 being spaced from the blade terminal 25 by an insulating washer 31.
  • Both the terminal 25 and the terminal 29 are held against axial and rotational movement relative to the sleeve 23, but by virture of the chamfered face of the flange 28, there is sufficient clearance between the flange 28 and the terminal 29 to permit the terminal 29 to pivot on the sleeve 23 in a direction towards and away from the head 18 of the rivet 16.
  • a compression spring 32 is secured at one end to the spindle 19, and bears at its other end against the member 15, the spring 32urging the spindle 19 in a direction to engage the contact 26 with the contact 27, and to engage a contact area of the terminal 29 with the contact defined by the head 18 of the rivet 16, thereby completing a first electrical circuit between the terminal 25 and the frame 11, and a second electrical circuit between the terminals 17,29.
  • the switch is so arranged that the terminal 29 engages the head 18 fractionally before the contact 26 engages the contact 27. Since the plate 29 is capable of a small degree of pivotal movement relative to the sleeve 23, then the movement of thespindle 19 will not be arrested by the en a ement of the terminal 29 with the head 18, and the spindfe9 can move further under the action of the spring 32 to engage the contact 26 with the contact 27.
  • the switch is intended for use in a road vehicle, and is intended to be operated by a door of the road vehicle.
  • the switch is secured within the bodywork of the vehicle, by means of the bracket 13, with the end of the spindle 19 remote from the screw 22 pro'ecting through the door frame of the vehicle so as to be engageable by the door when the door is in its closed position.
  • the spindle 19 is held in a position wherein neither of the circuits of the switch is made, and upon opening the door the spindle 19 is moved by the spring 32 to close both circuits.
  • the contact 27 is of course earthed, through the frame 11 and the bracket 13, and the contacts 26, 27 can be used to control for example, a courtesy light of the vehicle, while the contacts constituted by the head 18 and the terminal 29, for example, be connected in a warning circuit including a warning devide and a switch operated by insertion of the ignition key into the ignition switch of the vehicle, so that a warning will be given to the driver of the vehicle if the door is opened while the ignition key is still in the ignition switch.
  • the frame 11 can be insulated from the body of the vehicle, and a further blade terminal can be provided, the further blade terminal being electrically connected to the contact 27, so that both of the circuits of the switch are insulated return circuits.
  • An electrical switch including a pair of fixed contacts, an operating member movable relative to the fixed contacts, and a pair of movable contacts carried by the operating member and engageable with the fixed contacts respectively in an operative position of the switch, one of said four contacts being capable of movement when engaged by its respective mating contact, and being arranged to be engaged by its respective mating contact fractionally before the remaining pair of contacts mate, so that both movable contacts can be engaged with their respective fixed contacts in said operative position.
  • a switch as claimed in claim 3 wherein said pair of fixed contacts are mounted on a conductive framework with the fixed contact which engages said one movable contact in use being carried by an insulating member, said insulating member serving to mount the contact on the framework and to insulate the contact from the framework.

Landscapes

  • Push-Button Switches (AREA)
US55024A 1969-08-11 1970-07-15 Electrical switches Expired - Lifetime US3655933A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4000869 1969-08-11

Publications (1)

Publication Number Publication Date
US3655933A true US3655933A (en) 1972-04-11

Family

ID=10412700

Family Applications (1)

Application Number Title Priority Date Filing Date
US55024A Expired - Lifetime US3655933A (en) 1969-08-11 1970-07-15 Electrical switches

Country Status (5)

Country Link
US (1) US3655933A (enrdf_load_stackoverflow)
DE (1) DE2036509A1 (enrdf_load_stackoverflow)
ES (1) ES160842Y (enrdf_load_stackoverflow)
FR (1) FR2056530A5 (enrdf_load_stackoverflow)
GB (1) GB1303818A (enrdf_load_stackoverflow)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3015001A (en) * 1958-12-11 1961-12-26 Gen Motors Corp Switch assembly
US3192329A (en) * 1961-12-21 1965-06-29 Europe Mfg Trust Double pole, double throw switching device with oscillating contact structure and camming means
US3448226A (en) * 1967-06-05 1969-06-03 Cutler Hammer Inc Compact electrical contact block with electrically isolated bridging contacts

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3015001A (en) * 1958-12-11 1961-12-26 Gen Motors Corp Switch assembly
US3192329A (en) * 1961-12-21 1965-06-29 Europe Mfg Trust Double pole, double throw switching device with oscillating contact structure and camming means
US3448226A (en) * 1967-06-05 1969-06-03 Cutler Hammer Inc Compact electrical contact block with electrically isolated bridging contacts

Also Published As

Publication number Publication date
ES160842U (es) 1970-10-01
GB1303818A (enrdf_load_stackoverflow) 1973-01-24
ES160842Y (es) 1971-07-01
DE2036509A1 (de) 1971-02-25
FR2056530A5 (enrdf_load_stackoverflow) 1971-05-14

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