GB932804A - Improvements in electric switches - Google Patents

Improvements in electric switches

Info

Publication number
GB932804A
GB932804A GB1910258A GB1910258A GB932804A GB 932804 A GB932804 A GB 932804A GB 1910258 A GB1910258 A GB 1910258A GB 1910258 A GB1910258 A GB 1910258A GB 932804 A GB932804 A GB 932804A
Authority
GB
United Kingdom
Prior art keywords
plunger
switch
casing
cylinder
cap
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
GB1910258A
Inventor
John Fletcher
Maurice Saxon Snell
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.)
DOWTY ELECTRICS Ltd
Original Assignee
DOWTY ELECTRICS 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 DOWTY ELECTRICS Ltd filed Critical DOWTY ELECTRICS Ltd
Priority to GB1910258A priority Critical patent/GB932804A/en
Priority to FR802616A priority patent/FR1242920A/en
Publication of GB932804A publication Critical patent/GB932804A/en
Expired legal-status Critical Current

Links

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
    • H01H13/02—Details
    • H01H13/04—Cases; Covers
    • H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
    • H01H13/063—Casings hermetically closed by a diaphragm through which passes an actuating member
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/02—Energy stored by the attraction or repulsion of magnetic parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
    • 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
    • H01H13/04—Cases; Covers
    • H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
    • H01H2013/066—Dustproof, splashproof, drip-proof, waterproof or flameproof casings using bellows

Landscapes

  • Switches Operated By Changes In Physical Conditions (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

932,804. Retractive switches; switch cases. DOWTY ELECTRICS Ltd. Aug. 19, 1959 [June 14, 1958], No. 19102/58. Class 38 (5). A switch mechanism substantially as in Specification 685,332, is hermetically sealed and has its actuating member arranged to avoid excessive movement upon overtravel of the operating member. An actuating plunger 12 is slidable in a cylindrical extension 20 of the casing 1 and has a shoulder 19 and washer 21 to limit its movement to little more than that necessary to operate the switch contacts. A metal bellows 26 is brazed at its lower end to the plunger 12 and is soldered at its upper end to cylinder 20. A hat-like member 32 is screwed to the top of plunger 12 to slidingly fit over the cylinder 20 and is enclosed in a cage formed by member 34 (also sliding on cylinder 20) and a cap member 35 to which the operating force is applied. A spring 33 is pre-loaded between cap 35 and a flange on member 32 such that initial movement of cap 35 moves plunger 12 to operate the switch but any overtravel is absorbed by the spring 33. Springs 22 and 42 ensure retraction of the plunger 12 when the operating force is removed. A rubber cover 43 is sealingly secured to cage member 34 and cylinder 20 by metal clips 45 and 46. Preset adjustment of the switch operation is made by a bolt 24 and locknut 25. Magnets 7 and 8 reinforce contact pressure. Connecting wires 54 extend from the switch contacts to terminals 57 through glass seals 52 in a soldered end-plate 51. The space between the plate 51 and terminal block 55 is filled with a cold setting resin, and a rubber boot 61 having sleeves 62 for the connecting cables is clamped over the terminal block by a metal ring 63. The casing is filled with dry air through a hole 67 which is then closed by solder. Tubes 64 are brazed to the casing 1 to accommodate mounting bolts. The Provisional Specification refers to use on aircraft in exposed positions, for example, to indicate undercarriage operation, and also states that a small window is provided in the casing with a capsule of cobalt chloride therein to indicate sealing failure by changing its colour upon entry of dampness.
GB1910258A 1958-06-14 1958-06-14 Improvements in electric switches Expired GB932804A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1910258A GB932804A (en) 1958-06-14 1958-06-14 Improvements in electric switches
FR802616A FR1242920A (en) 1958-06-14 1959-08-11 Electric switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1910258A GB932804A (en) 1958-06-14 1958-06-14 Improvements in electric switches

Publications (1)

Publication Number Publication Date
GB932804A true GB932804A (en) 1963-07-31

Family

ID=10123810

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1910258A Expired GB932804A (en) 1958-06-14 1958-06-14 Improvements in electric switches

Country Status (1)

Country Link
GB (1) GB932804A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0029205A1 (en) * 1979-11-15 1981-05-27 Hundt & Weber Schaltgeräte GmbH High-current switch
DE3020208A1 (en) * 1980-05-28 1981-12-03 Hundt & Weber Schaltgeräte GmbH, 5905 Freudenberg Switch with elastic sealing bellows - located around two insulating circular blocks carrying contacts and moving apart axially
US8404990B2 (en) 2010-06-30 2013-03-26 3M Innovative Properties Company Switch system having a button travel limit feature
GB2591263A (en) * 2020-01-23 2021-07-28 Continental Automotive Gmbh IP69 Protection Illumination Push Button

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0029205A1 (en) * 1979-11-15 1981-05-27 Hundt & Weber Schaltgeräte GmbH High-current switch
DE3020208A1 (en) * 1980-05-28 1981-12-03 Hundt & Weber Schaltgeräte GmbH, 5905 Freudenberg Switch with elastic sealing bellows - located around two insulating circular blocks carrying contacts and moving apart axially
US8404990B2 (en) 2010-06-30 2013-03-26 3M Innovative Properties Company Switch system having a button travel limit feature
GB2591263A (en) * 2020-01-23 2021-07-28 Continental Automotive Gmbh IP69 Protection Illumination Push Button

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