GB188430A - Improvements in circuit-closers for electrically operated alarm mechanisms of the thief or burglar type - Google Patents

Improvements in circuit-closers for electrically operated alarm mechanisms of the thief or burglar type

Info

Publication number
GB188430A
GB188430A GB2303421A GB2303421A GB188430A GB 188430 A GB188430 A GB 188430A GB 2303421 A GB2303421 A GB 2303421A GB 2303421 A GB2303421 A GB 2303421A GB 188430 A GB188430 A GB 188430A
Authority
GB
United Kingdom
Prior art keywords
frame
contact
container
suspended
weight
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
GB2303421A
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.)
GEORGE WILLIAM WACKER
Original Assignee
GEORGE WILLIAM WACKER
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 GEORGE WILLIAM WACKER filed Critical GEORGE WILLIAM WACKER
Priority to GB2303421A priority Critical patent/GB188430A/en
Publication of GB188430A publication Critical patent/GB188430A/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
    • H01H35/02—Switches operated by change of position, inclination or orientation of the switch itself in relation to gravitational field
    • H01H35/027—Switches operated by change of position, inclination or orientation of the switch itself in relation to gravitational field the inertia mass activating the switch mechanically, e.g. through a lever
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/10—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles actuating a signalling device
    • B60R25/1004—Alarm systems characterised by the type of sensor, e.g. current sensing means
    • B60R25/1006—Mechanical sensors, e.g. pendulums

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

188,430. Wacker, G. W. Aug. 30, 1921. Gravity and inertia switches suitable for mounting on a motor vehicle and operating when tilted or vibrated so as to give an alarm by closing a bell or horn circuit when the vehicle is entered or moved by an unauthorized person comprise a container 10 in which is suspended on a threelink chain 18, to afford a universal joint, a bell frame 15 in which is suspended in turn a contact-arm 25 controlled by a spring 39 and having contacts 26, 27 co-operating with fixed adjustable contacts 28, 29 on the frame. The suspended frame 15 has a heavy disc 16 at its lower end and below the disc a weight 17 is mounted. The.whole frame may be lowered by means of the links 19, 21, 22 so that the weight 17 becomes immersed in a thick fluid, for example, rubber solution, whereby movement of the frame is prevented and the alarm put out of action if desired. The contact-member is loosely pivoted at 41 and provided with a weight 38 counterbalanced by the adjustable spring 39 so that the contact-member yields freely to tilting or vibration of the container. When tilted the frame engaged an internal flange 14 on the container and vibrates the contact-member to cause it to engage one of the fixed contacts.
GB2303421A 1921-08-30 1921-08-30 Improvements in circuit-closers for electrically operated alarm mechanisms of the thief or burglar type Expired GB188430A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2303421A GB188430A (en) 1921-08-30 1921-08-30 Improvements in circuit-closers for electrically operated alarm mechanisms of the thief or burglar type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2303421A GB188430A (en) 1921-08-30 1921-08-30 Improvements in circuit-closers for electrically operated alarm mechanisms of the thief or burglar type

Publications (1)

Publication Number Publication Date
GB188430A true GB188430A (en) 1922-11-16

Family

ID=10189035

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2303421A Expired GB188430A (en) 1921-08-30 1921-08-30 Improvements in circuit-closers for electrically operated alarm mechanisms of the thief or burglar type

Country Status (1)

Country Link
GB (1) GB188430A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632069A (en) * 1950-01-16 1953-03-17 Bradner Mead Impact operated switch
US20180280250A1 (en) * 2017-03-29 2018-10-04 Timothy Smith Baby calming device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632069A (en) * 1950-01-16 1953-03-17 Bradner Mead Impact operated switch
US20180280250A1 (en) * 2017-03-29 2018-10-04 Timothy Smith Baby calming device

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