GB1100251A - Improvements in electric bells - Google Patents

Improvements in electric bells

Info

Publication number
GB1100251A
GB1100251A GB325064A GB325064A GB1100251A GB 1100251 A GB1100251 A GB 1100251A GB 325064 A GB325064 A GB 325064A GB 325064 A GB325064 A GB 325064A GB 1100251 A GB1100251 A GB 1100251A
Authority
GB
United Kingdom
Prior art keywords
solenoid
transistor
gong
multivibrator
bell
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
GB325064A
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.)
ASSOCIATED FIRE ALARMS Ltd
Original Assignee
ASSOCIATED FIRE ALARMS 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 ASSOCIATED FIRE ALARMS Ltd filed Critical ASSOCIATED FIRE ALARMS Ltd
Priority to GB325064A priority Critical patent/GB1100251A/en
Publication of GB1100251A publication Critical patent/GB1100251A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K1/00—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs
    • G10K1/06—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube
    • G10K1/062—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube electrically operated
    • G10K1/063—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube electrically operated the sounding member being a bell
    • G10K1/064—Operating or striking mechanisms therefor

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)

Abstract

1,100,251. Electric bells. ASSOCIATED FIRE ALARMS Ltd., and C. G. DOUGLAS. 23 April, 1965 [24 Jan., 1964], No. 3250/64. Heading G5J. The bell shown has a striker 15 attached to a solenoid armature which flies up to strike the gong each time the solenoid is energized by a pulse from a free running transistor oscillator circuit. When the plunger falls back its head 14 strikes a rebound spring which has a natural frequency equal to or a harmonic of that of the oscillator. The solenoid is in series with a transistor controlled by the output of one of the transistors constituting the multivibrator and may be shunted by a diode to suppress inductive peaks. The other multivibrator transistor may control a similar bell. The circuitry is mounted in a gong on a panel 23.
GB325064A 1964-01-24 1964-01-24 Improvements in electric bells Expired GB1100251A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB325064A GB1100251A (en) 1964-01-24 1964-01-24 Improvements in electric bells

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB325064A GB1100251A (en) 1964-01-24 1964-01-24 Improvements in electric bells

Publications (1)

Publication Number Publication Date
GB1100251A true GB1100251A (en) 1968-01-24

Family

ID=9754790

Family Applications (1)

Application Number Title Priority Date Filing Date
GB325064A Expired GB1100251A (en) 1964-01-24 1964-01-24 Improvements in electric bells

Country Status (1)

Country Link
GB (1) GB1100251A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050914A1 (en) * 1980-10-27 1982-05-05 General Signal Corporation Electronic interrupter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050914A1 (en) * 1980-10-27 1982-05-05 General Signal Corporation Electronic interrupter

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