GB1394064A - Pressure responsive switch -press-to-break- - Google Patents

Pressure responsive switch -press-to-break-

Info

Publication number
GB1394064A
GB1394064A GB5946971A GB5946971A GB1394064A GB 1394064 A GB1394064 A GB 1394064A GB 5946971 A GB5946971 A GB 5946971A GB 5946971 A GB5946971 A GB 5946971A GB 1394064 A GB1394064 A GB 1394064A
Authority
GB
United Kingdom
Prior art keywords
bowed portion
stud
head
hole
insulating base
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
GB5946971A
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB5946971A priority Critical patent/GB1394064A/en
Publication of GB1394064A publication Critical patent/GB1394064A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/14—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for operation by a part of the human body other than the hand, e.g. by foot
    • H01H3/141—Cushion or mat switches
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/40—Safety devices, e.g. detection of obstructions or end positions
    • E05F15/42—Detection using safety edges
    • E05F15/44—Detection using safety edges responsive to changes in electrical conductivity
    • E05F2015/447—Detection using safety edges responsive to changes in electrical conductivity using switches in serial arrangement
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/14—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for operation by a part of the human body other than the hand, e.g. by foot
    • H01H3/141—Cushion or mat switches
    • H01H2003/146—Cushion or mat switches being normally closed

Landscapes

  • Push-Button Switches (AREA)

Abstract

1394064 Retractive switches NATIONAL RESEARCH DEVELOPMENT CORP 21 Dec 1972 [21 Dec 1971] 59469/71 Heading H1N A switch unit, suitable for use under a mat and of the kind which breaks a circuit when stepped on, comprises a metalleafspring 1 which in the unstressed condition has a bowed portion 2, a metal stud having a shank 6 which passes freely through a hole 3 in the bowed portion 2, a head 7 on the convex side of the bowed portion and larger than the hole 3, and restraining means co-operating with the stud and the ends of the bowed portion so that the bowed portion is held under stress by the head of the stud which thereby makes electrical contact with the leaf spring but is otherwise insulated therefrom. As shown in Fig. 1, a rigid insulating base 4 provides the restraining means, but in the embodiment of Fig. 3 a second leaf spring 10 acts against a second head 7a of the stud, which may be fixed in the insulating base 4 or pass freely through a hole 12, as shown. Several switch units may be assembled in series and enclosed in a p.v.c. envelope (30, Fig. 4, not shown). The insulating base member may be a flexible sheet (4a) of p.v.c. and may be heat sealed to the envelope (30). In a modification (Figs. 7 and 8, not shown) an even more flexible arrangement is disclosed wherein the base member is replaced by individual discs (45) of p.v.c. This allows the assembly to be formed into various shapes by pivoting about the studs, and the discs (45) may then be spot-welded to a plastics envelope sealing the whole switch. The springs and studs are of stainless steel, spring steel, or beryllium copper, and may be gold or silver plated at the contact areas.
GB5946971A 1971-12-21 1971-12-21 Pressure responsive switch -press-to-break- Expired GB1394064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5946971A GB1394064A (en) 1971-12-21 1971-12-21 Pressure responsive switch -press-to-break-

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5946971A GB1394064A (en) 1971-12-21 1971-12-21 Pressure responsive switch -press-to-break-

Publications (1)

Publication Number Publication Date
GB1394064A true GB1394064A (en) 1975-05-14

Family

ID=10483822

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5946971A Expired GB1394064A (en) 1971-12-21 1971-12-21 Pressure responsive switch -press-to-break-

Country Status (1)

Country Link
GB (1) GB1394064A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2183919A (en) * 1985-12-06 1987-06-10 Cyril John Peachey Safety mat elements
EP0440285A2 (en) * 1990-01-31 1991-08-07 Tapeswitch Corporation Of America Normally closed pressure-actuated switch
WO1994012996A1 (en) * 1992-12-03 1994-06-09 Mayser Gmbh & Co. Switching pad or plate

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2183919A (en) * 1985-12-06 1987-06-10 Cyril John Peachey Safety mat elements
EP0440285A2 (en) * 1990-01-31 1991-08-07 Tapeswitch Corporation Of America Normally closed pressure-actuated switch
EP0440285A3 (en) * 1990-01-31 1992-08-05 Tapeswitch Corporation Of America Normally closed pressure-actuated switch
WO1994012996A1 (en) * 1992-12-03 1994-06-09 Mayser Gmbh & Co. Switching pad or plate
DE4240622A1 (en) * 1992-12-03 1994-06-09 Mayser Gmbh & Co Safety mat or circuit board
US5512716A (en) * 1992-12-03 1996-04-30 Mayser Gmbh & Co. Switching pad or plate

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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