[go: up one dir, main page]

GB258669A - An improved burglar alarm - Google Patents

An improved burglar alarm

Info

Publication number
GB258669A
GB258669A GB1645825A GB1645825A GB258669A GB 258669 A GB258669 A GB 258669A GB 1645825 A GB1645825 A GB 1645825A GB 1645825 A GB1645825 A GB 1645825A GB 258669 A GB258669 A GB 258669A
Authority
GB
United Kingdom
Prior art keywords
ball
support
dome
ring
box
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
GB1645825A
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
Priority to BE338849D priority Critical patent/BE338849A/xx
Application filed by Individual filed Critical Individual
Priority to GB1645825A priority patent/GB258669A/en
Publication of GB258669A publication Critical patent/GB258669A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/14—Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch
    • H01H35/144—Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch operated by vibration

Landscapes

  • Burglar Alarm Systems (AREA)

Abstract

258,669. Becker, L. A. de. June 25, 1925. Gravity and inertia switches. - A ball 5 is carried by a support 4 which is surrounded by an upstanding ring 7 so that when the ball is displaced it falls into the channel 8 between the support and ring and completes the circuit of a bell 2. The ball, support, and ring may be contained in a box 1 of millboard &c., to be secured to a door, window-sash, &c., and the bell 2 and battery 3 may be included in the box. The support may take the form of a pillar, in which case the ring 7 would be of inverted conical form. The dome or support 4 may be carried by a spring which, when the ball 5 is displaced, presses the dome against a contact on the lid of the box to ensure the alarm ringing even if the ball fails to complete the circuit. In this case, two upstanding rings, one electrically connected to the dome, are provided to form a channel into which the ball falls. The dome 4 may be corrugated.
GB1645825A 1925-06-25 1925-06-25 An improved burglar alarm Expired GB258669A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE338849D BE338849A (en) 1925-06-25
GB1645825A GB258669A (en) 1925-06-25 1925-06-25 An improved burglar alarm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1645825A GB258669A (en) 1925-06-25 1925-06-25 An improved burglar alarm

Publications (1)

Publication Number Publication Date
GB258669A true GB258669A (en) 1926-09-27

Family

ID=10077689

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1645825A Expired GB258669A (en) 1925-06-25 1925-06-25 An improved burglar alarm

Country Status (2)

Country Link
BE (1) BE338849A (en)
GB (1) GB258669A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3038151A (en) * 1960-04-21 1962-06-05 Elliott & Evans Inc Wave-actuated signal
US3138793A (en) * 1961-03-29 1964-06-23 Philco Corp Electric circuit control unit
US4100539A (en) * 1977-01-31 1978-07-11 Marine Resources, Inc. Burglar alarm for door knob
GB2145861A (en) * 1983-08-01 1985-04-03 Valier Grossman Marcel Audio warning system for a door or window

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3038151A (en) * 1960-04-21 1962-06-05 Elliott & Evans Inc Wave-actuated signal
US3138793A (en) * 1961-03-29 1964-06-23 Philco Corp Electric circuit control unit
US4100539A (en) * 1977-01-31 1978-07-11 Marine Resources, Inc. Burglar alarm for door knob
GB2145861A (en) * 1983-08-01 1985-04-03 Valier Grossman Marcel Audio warning system for a door or window

Also Published As

Publication number Publication date
BE338849A (en)

Similar Documents

Publication Publication Date Title
GB258669A (en) An improved burglar alarm
GB288956A (en) Improvements in burglar alarms
GB985413A (en) Improvements in or relating to bells, chimes and like signalling devices
GB326941A (en) Improvements in or relating to electric plugs
SU81276A1 (en) Contact device for opening the linear circuit of the ST-35 apparatus
GB179289A (en) Improvements in or relating to burglar alarms
GB190720744A (en) Improvements in Jewel Boxes or Cases.
GB211751A (en) Alarm clock
US1743597A (en) Combined door knocker and switch
GB190902903A (en) Improvements in Shop Door, Burglar, or the like Alarm Devices.
GB292649A (en) Improvements to electric burglar alarms
GB191125031A (en) An Improved Fire and Temperature Alarm.
GB153958A (en) Improvements in universal surface gauges
CA247073A (en) Electrical burglar alarm
GB312810A (en) Improvements relating to electric cells or batteries
GB207263A (en) Improvements in electric burglar and like alarms
GB190506866A (en) Improvements relating to Emergency Signalling Devices.
GB190905337A (en) A Combination Electric Bell Push and Fire Alarm.
GB190903717A (en) Improvements in Telephones.
GB190702019A (en) An Electric Door-contact for Alarm Bells and the like
CA226333A (en) Burglar alarm
CA225296A (en) Burglar alarm
CA238922A (en) Electric burglar alarm
CA239159A (en) Burglar alarm
CA243247A (en) Burglar alarm