GB1458241A - Limit switch - Google Patents

Limit switch

Info

Publication number
GB1458241A
GB1458241A GB849674A GB849674A GB1458241A GB 1458241 A GB1458241 A GB 1458241A GB 849674 A GB849674 A GB 849674A GB 849674 A GB849674 A GB 849674A GB 1458241 A GB1458241 A GB 1458241A
Authority
GB
United Kingdom
Prior art keywords
plunger
cam
spindle
stud
plates
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
GB849674A
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.)
Cutler Hammer Europe Ltd
Cutler Hammer Inc
Original Assignee
Cutler Hammer Europe Ltd
Cutler Hammer 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
Application filed by Cutler Hammer Europe Ltd, Cutler Hammer Inc filed Critical Cutler Hammer Europe Ltd
Publication of GB1458241A publication Critical patent/GB1458241A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/18—Movable parts; Contacts mounted thereon
    • H01H21/22—Operating parts, e.g. handle
    • H01H21/24—Operating parts, e.g. handle biased to return to normal position upon removal of operating force
    • H01H21/28—Operating 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
    • H01H21/285—Operating 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/18—Movable parts; Contacts mounted thereon
    • H01H21/22—Operating parts, e.g. handle
    • H01H21/24—Operating parts, e.g. handle biased to return to normal position upon removal of operating force
    • H01H21/28—Operating 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
    • H01H2021/287—Operating 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 with adjustable head, e.g. the actuator head can have different positions in relation to the limit switch itself
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating
    • Y10T74/1892—Lever and slide
    • Y10T74/1896—Cam connections

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Closures For Containers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Abstract

1458241 Retractive switches CUTLERHAMMER EUROPA Ltd 25 Feb 1974 [26 Feb 1973] 8496/74 Heading H1N A limit switch comprises an operating head sub-assembly 2 including an operating member 8 linked to a plunger 52, and a switch subassembly 4 including an adjustable switch actuating member 64, actuated by plunger 52 when operating member 8 is operated, the housings 2a, 4a of the sub-assemblies 2, 4 forming a sealed enclosure. Plunger 52 bears on lever 64 supported at one end on adjustable pivot 62 and bearing at its other end on contact actuating button 12. Turning member 8 turns spindle 10 which in one direction, clockwise looking at Fig. 2, rotates cam 22 which pivots lever 32 about pivot 30 to depress stud 40a, stud-head 40, one of plates 42 and plunger 52. A second cam (24), Fig. 5 (not shown) is mounted on spindle 10 at its other end and clockwise rotation of spindle 10 brings cam (24) against pivot 30 or that cam (24) cannot move. Rotation of spindle 10 anticlockwise looking at Fig. 2 causes spindle 10 to rotate in cam 22 until flat 10a on spindle 10 engages nib 22d on cam 22 which urges cam 22 against pivot 30 so that cam 22 cannot move but cam (24) can rotate pivoting lever (34), Fig. 5 (not shown) depressing stud 38, which is similar to stud 40a and stud head 40, to depress the top upper trifurcated plate 42 shown in Fig. 3 to depress plunger 52. Plunger 52 is depressed by the upper or lower plates 42 acting on flange 52a of plunger 52. Plunger 52 is located on a peg 54 the lower part of which is square and the upper part round, the outer arms 42b of plates 42 fitting on one side of flange 52a to retain plunger 52 in sub-assembly 2 and the central arms 42a of plates 42 engaging the other side of flange 52a to depress it. Lifting plunger 52 clear of the square part of peg 54 and rotating it enables flange 52a to be engaged by one or both of plates 42 or that plunger 52 is depressed by rotating member 8 in one direction only or the other only or both. There is a retractive spiral spring (28), Fig. 5, round spindle 10. A sealing gasket 44 terminating in ends 44a is between the two housings 2a and 4a, and there is a sealing gasket 58 round spindle 10 where it leaves housing 2a, gasket 58 forming a pocket, Fig. 4 (not shown) so that liquid attempting to enter tightens the seal provided by gasket 58.
GB849674A 1973-02-26 1974-02-25 Limit switch Expired GB1458241A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00335881A US3819888A (en) 1973-02-26 1973-02-26 Limit switch mechanism

Publications (1)

Publication Number Publication Date
GB1458241A true GB1458241A (en) 1976-12-08

Family

ID=23313617

Family Applications (1)

Application Number Title Priority Date Filing Date
GB849674A Expired GB1458241A (en) 1973-02-26 1974-02-25 Limit switch

Country Status (8)

Country Link
US (1) US3819888A (en)
JP (1) JPS49117979A (en)
AU (1) AU473114B2 (en)
BR (1) BR7310134D0 (en)
CA (1) CA1003470A (en)
DE (2) DE2408384C2 (en)
FR (1) FR2219511B1 (en)
GB (1) GB1458241A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135517A (en) * 1983-02-15 1984-08-30 Crabtree Electrical Ind Ltd Operating mechanism for limit switches

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52114274U (en) * 1977-01-14 1977-08-30
JPS52114275U (en) * 1977-01-14 1977-08-30
US4223217A (en) * 1977-05-12 1980-09-16 Eaton Corporation Fiber optic electric switch
US4412129A (en) * 1981-04-01 1983-10-25 Eaton Corporation Adjustable photoelectric detector head for solid state limit switch
DE4114818C2 (en) * 1991-05-07 1999-01-07 Martin Otto Maschbau Gmbh Device on multi-sided planing machines
US20050281651A1 (en) * 2004-05-06 2005-12-22 David Simpson Hook lift hoist adaptable for use with containers of variabile length
EP2705929B1 (en) * 2012-09-06 2021-04-14 Siemens Healthcare Diagnostics Products GmbH Adjustment system for a transfer system in an in-vitro diagnostic system
US11543047B2 (en) 2020-12-31 2023-01-03 Automatic Switch Company Switch assembly for valve actuator

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2977447A (en) * 1957-10-23 1961-03-28 Haydon Switch Inc Switch and actuator assembly
DE1216415B (en) * 1961-11-14 1966-05-12 Siemens Ag Roller lever drive
US3252345A (en) * 1963-08-02 1966-05-24 Robertshaw Controls Co Actuating mechanism and parts therefor or the like
DE1939205U (en) 1963-10-26 1966-05-26 Siemens Ag LAMP WITH A DEVICE FOR SUSPENSION ON A METALLIC SUSPENSION CABLE.
DE1903448C3 (en) * 1969-01-24 1973-09-20 Robert Bosch Gmbh, 7000 Stuttgart Device for easily detachable attachment of limit switches
DE1939205A1 (en) * 1969-08-01 1971-02-18 Bosch Gmbh Robert Actuating head for a limit switch
DE2145115C3 (en) * 1971-09-09 1974-05-22 Honeywell Gmbh, 6000 Frankfurt Limit switch with a transmission element acting on a snap device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135517A (en) * 1983-02-15 1984-08-30 Crabtree Electrical Ind Ltd Operating mechanism for limit switches

Also Published As

Publication number Publication date
DE2408384A1 (en) 1974-08-29
JPS49117979A (en) 1974-11-11
US3819888A (en) 1974-06-25
AU473114B2 (en) 1976-06-10
DE2408384C2 (en) 1982-12-16
FR2219511B1 (en) 1980-03-21
CA1003470A (en) 1977-01-11
DE2463077C2 (en) 1987-04-02
FR2219511A1 (en) 1974-09-20
BR7310134D0 (en) 1974-11-12
AU6225373A (en) 1975-05-08

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee