GB1309459A - Electrical limit switch - Google Patents

Electrical limit switch

Info

Publication number
GB1309459A
GB1309459A GB3668170A GB3668170A GB1309459A GB 1309459 A GB1309459 A GB 1309459A GB 3668170 A GB3668170 A GB 3668170A GB 3668170 A GB3668170 A GB 3668170A GB 1309459 A GB1309459 A GB 1309459A
Authority
GB
United Kingdom
Prior art keywords
contacts
rack
shaft
plunger
july
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
Application number
GB3668170A
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.)
Arrow Hart Inc
Original Assignee
Arrow Hart Inc
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 to US84600269A priority Critical
Application filed by Arrow Hart Inc filed Critical Arrow Hart Inc
Publication of GB1309459A publication Critical patent/GB1309459A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H15/00Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
    • H01H15/02Details
    • H01H15/06Movable parts; Contacts mounted thereon
    • H01H15/10Operating parts
    • H01H15/102Operating parts comprising cam devices
    • H01H15/107Operating parts comprising cam devices actuating conventional selfcontained microswitches
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02Details
    • H01H21/18Movable parts; Contacts mounted thereon
    • H01H21/22Operating parts, e.g. handle
    • H01H21/24Operating parts, e.g. handle biased to return to normal position upon removal of operating force
    • H01H21/28Operating parts, e.g. handle biased to return to normal position upon removal of operating force 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
    • H01H21/285Operating parts, e.g. handle biased to return to normal position upon removal of operating force 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 having an operating arm actuated by the movement of the body and mounted on an axis converting its rotating movement into a rectilinear switch activating movement
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00Apparatus or processes specially adapted for manufacture of electric switches
    • H01H11/0006Apparatus or processes specially adapted for manufacture of electric switches for converting electric switches
    • H01H11/0018Apparatus or processes specially adapted for manufacture of electric switches for converting electric switches for allowing different operating parts
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02Details
    • H01H13/26Snap-action arrangements depending upon deformation of elastic members
    • H01H13/36Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs
    • H01H13/365Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs having a symmetrical configuration

Abstract

1309459 Electric switches ARROW-HART Inc 29 July 1970 [30 July 1969] 36681/70 Heading H1N An electric limit switch has contacts 52, 54 movable by means of abutting plungers 40, 48 which are linearly slidable within housing 39, the plungers having respective movable seals 42 and 50. The plunger 48 is biased upwards by spring 70 such that contacts 52, 54 bridge contacts 84, 86. Rotation of the rocker arm 28 causes the larger surface of the cam 24, mounted on shaft 14 to push plunger 40 downwards, with the contacts 52, 54 snapping into their second bridging position across contacts 56, 58. The shaft 14 also carries a pinion 20 which engages with an axially slidable spring biased rack 18, which is claimed in Specification 1,309,460. Springs 34, 36, Fig. 2A, engage a partition 19 within the rack 18, so as to position it centrally. When the rack is moved, in operation, a pin 16 engages and holds one of the springs while the other is compressed by the partition in the rack. The switch can be operated either by clockwise rotation of the shaft 14, Fig. 2A, or be converted for counterclockwise rotation, Fig. 4 (not shown). In Figs. 6 to 10 (not shown) the upper part of the housing is replaced by alternative plunger operating arrangements and include operation by vertical and horizontal displacement and a detent latching arrangement.
GB3668170A 1969-07-30 1970-07-29 Electrical limit switch Expired GB1309459A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US84600269A true 1969-07-30 1969-07-30

Publications (1)

Publication Number Publication Date
GB1309459A true GB1309459A (en) 1973-03-14

Family

ID=25296667

Family Applications (2)

Application Number Title Priority Date Filing Date
GB3668170A Expired GB1309459A (en) 1969-07-30 1970-07-29 Electrical limit switch
GB1953670A Expired GB1309460A (en) 1969-07-30 1970-07-29 Electrical limit switch

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB1953670A Expired GB1309460A (en) 1969-07-30 1970-07-29 Electrical limit switch

Country Status (3)

Country Link
US (1) US3649785A (en)
CA (1) CA926899A (en)
GB (2) GB1309459A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256969A (en) * 1991-05-24 1992-12-23 Matsushita Electric Ind Co Ltd Waterproof push button switches.

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3749860A (en) * 1971-12-30 1973-07-31 Allen Bradley Co Sealed limit switch
US3789177A (en) * 1972-05-26 1974-01-29 Gen Electric Actuating mechanism for a limit switch having elongated pivotally mounted actuating member
US3867598A (en) * 1973-10-09 1975-02-18 Westinghouse Electric Corp Control switch
US3983343A (en) * 1975-06-25 1976-09-28 Cutler-Hammer, Inc. Limit switch operating shaft return spring damping device
JPS5340870A (en) * 1976-09-27 1978-04-13 Matsushita Electric Works Ltd Electric switch
CA1236506A (en) * 1983-01-12 1988-05-10 Norio Iwakiri Limit switch assembly
US4746772A (en) * 1986-09-23 1988-05-24 Fisher Controls International, Inc. Adjustable position indicating apparatus
US4847453A (en) * 1987-11-03 1989-07-11 Square D Company Limit switch with actuator
IT1248935B (en) * 1990-06-04 1995-02-11 Sin Cros M D S R L Mobile contact structure, actuated by means of a roller, particularly designed for spark gap of endothermic engines
CN102956393A (en) * 2011-08-24 2013-03-06 欧姆龙株式会社 Switching device
EA020431B1 (en) * 2011-11-09 2014-11-28 Елена Евгеньевна Кашичкина Limit switch
FR3011672B1 (en) * 2013-10-04 2018-09-28 Schneider Electric Industries Sas POSITION SWITCH
JP6316075B2 (en) * 2014-04-15 2018-04-25 アズビル株式会社 Limit switch
EP2966287B1 (en) * 2014-07-07 2019-08-28 Goodrich Actuation Systems Ltd. Pressure switch for thrust reverser control
US9679733B2 (en) * 2014-10-02 2017-06-13 Cooper Technologies Company Actuation system for an electrical switching device

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US430054A (en) * 1890-06-10 Johan m
US2328266A (en) * 1941-10-28 1943-08-31 Bliss E W Co Operating mechanism for switches
US2390365A (en) * 1943-01-02 1945-12-04 Gen Electric Electric switch
US2752448A (en) * 1951-04-27 1956-06-26 Westinghouse Electric Corp Switching equipment for compressed air circuit breakers
US3055226A (en) * 1959-10-08 1962-09-25 Square D Co Overtravel and snap-back control device for limit switch arms
US3252345A (en) * 1963-08-02 1966-05-24 Robertshaw Controls Co Actuating mechanism and parts therefor or the like
US3244015A (en) * 1964-07-10 1966-04-05 Square D Co Switch operating mechanism
US3317687A (en) * 1965-04-28 1967-05-02 Allen Bradley Co Manually resettable switch actuator
US3414693A (en) * 1966-04-29 1968-12-03 Tomkins Johnson Co Cylinder head limit switch assembly
US3546954A (en) * 1966-07-22 1970-12-15 Buchanan Electrical Prod Corp Device for actuating a limit control element
US3412223A (en) * 1966-08-01 1968-11-19 Charles A. Schad Pressure switch
US3517141A (en) * 1967-11-13 1970-06-23 Avis Ind Corp Limit switch
US3539738A (en) * 1968-11-12 1970-11-10 Gen Electric Miniature industrial limit switch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256969A (en) * 1991-05-24 1992-12-23 Matsushita Electric Ind Co Ltd Waterproof push button switches.
US5258592A (en) * 1991-05-24 1993-11-02 Matsushita Electric Industrial Co., Ltd. Waterproof switch apparatus for electronic device
GB2256969B (en) * 1991-05-24 1995-05-31 Matsushita Electric Ind Co Ltd A combination of a waterproof switch apparatus and an electronic device

Also Published As

Publication number Publication date
US3649785A (en) 1972-03-14
CA926899A1 (en)
CA926899A (en) 1973-05-22
GB1309460A (en) 1973-03-14

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Legal Events

Date Code Title Description
PS Patent sealed
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee