GB402446A - Improvements in or relating to automatic burglar alarms - Google Patents

Improvements in or relating to automatic burglar alarms

Info

Publication number
GB402446A
GB402446A GB1540232A GB1540232A GB402446A GB 402446 A GB402446 A GB 402446A GB 1540232 A GB1540232 A GB 1540232A GB 1540232 A GB1540232 A GB 1540232A GB 402446 A GB402446 A GB 402446A
Authority
GB
United Kingdom
Prior art keywords
strips
strip
projections
arched
contact
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
GB1540232A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1540232A priority Critical patent/GB402446A/en
Publication of GB402446A publication Critical patent/GB402446A/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
    • 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
    • H01H3/142—Cushion or mat switches of the elongated strip type

Landscapes

  • Burglar Alarm Systems (AREA)

Abstract

402,446. Retractive switches. OLLERENSHAW, R. E., 81, Blackfriars Road, London. May 31, 1932, No. 15402. [Class 38 (v).] An electric switch particularly adapted for use in an automatic burglar alarm comprises a number of pairs of contact strips 14, 15, spaced apart in a mat 10, the strip 15 being arched between its opposite longitudinal edges. The strip 14 has a row of raised contact elements 18 with which the resilient arched contact strip 15 is forced to engage when a suitable pressure is applied at any point along its length, thus closing the alarm circuit. The edges of the strips 14, 15 are insulated from one another by adhesive tape 16, 17, or by a layer of paper having apertures registering with the projections 18. The series of strips 14 may be replaced by a single sheet of metal having spaced projections 18.
GB1540232A 1932-05-31 1932-05-31 Improvements in or relating to automatic burglar alarms Expired GB402446A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1540232A GB402446A (en) 1932-05-31 1932-05-31 Improvements in or relating to automatic burglar alarms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1540232A GB402446A (en) 1932-05-31 1932-05-31 Improvements in or relating to automatic burglar alarms

Publications (1)

Publication Number Publication Date
GB402446A true GB402446A (en) 1933-11-30

Family

ID=10058511

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1540232A Expired GB402446A (en) 1932-05-31 1932-05-31 Improvements in or relating to automatic burglar alarms

Country Status (1)

Country Link
GB (1) GB402446A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2770696A (en) * 1954-01-06 1956-11-13 Robert H Koenig Tape switch
US2812402A (en) * 1954-03-30 1957-11-05 Dixon Res Inc Electrical switch construction
US2843690A (en) * 1956-10-18 1958-07-15 Miller Bros Safety edge for hangar door
FR2538944A1 (en) * 1982-12-30 1984-07-06 Petri Ag SIGNALING CONTACTOR FOR MOTOR VEHICLES

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2770696A (en) * 1954-01-06 1956-11-13 Robert H Koenig Tape switch
US2812402A (en) * 1954-03-30 1957-11-05 Dixon Res Inc Electrical switch construction
US2843690A (en) * 1956-10-18 1958-07-15 Miller Bros Safety edge for hangar door
FR2538944A1 (en) * 1982-12-30 1984-07-06 Petri Ag SIGNALING CONTACTOR FOR MOTOR VEHICLES

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