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AU461765B2 - A SOLID STATE BELL ringing system - Google Patents
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AU461765B2 - A SOLID STATE BELL ringing system - Google Patents

A SOLID STATE BELL ringing system

Info

Publication number
AU461765B2
AU461765B2 AU38669/72A AU3866972A AU461765B2 AU 461765 B2 AU461765 B2 AU 461765B2 AU 38669/72 A AU38669/72 A AU 38669/72A AU 3866972 A AU3866972 A AU 3866972A AU 461765 B2 AU461765 B2 AU 461765B2
Authority
AU
Australia
Prior art keywords
solid state
bell ringing
ringing system
state bell
solid
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
AU38669/72A
Other versions
AU3866972A (en
Inventor
O. G. Darrow John
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.)
Westinghouse Air Brake Co
Original Assignee
Westinghouse Air Brake Co
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 Westinghouse Air Brake Co filed Critical Westinghouse Air Brake Co
Publication of AU3866972A publication Critical patent/AU3866972A/en
Application granted granted Critical
Publication of AU461765B2 publication Critical patent/AU461765B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems, e.g. audible personal calling systems
    • G08B3/10—Audible signalling systems, e.g. audible personal calling systems using electric transmission; using electromagnetic transmission

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
AU38669/72A 1971-08-11 1972-02-04 A SOLID STATE BELL ringing system Expired AU461765B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
USUS170,927 1971-08-11
US170927A US3868683A (en) 1971-08-11 1971-08-11 Solid state bell ringing system

Publications (2)

Publication Number Publication Date
AU3866972A AU3866972A (en) 1973-08-09
AU461765B2 true AU461765B2 (en) 1975-05-15

Family

ID=22621838

Family Applications (1)

Application Number Title Priority Date Filing Date
AU38669/72A Expired AU461765B2 (en) 1971-08-11 1972-02-04 A SOLID STATE BELL ringing system

Country Status (2)

Country Link
US (1) US3868683A (en)
AU (1) AU461765B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103258A (en) * 1976-03-18 1978-07-25 Mitsubishi Denki Kabushiki Kaisha Pulse generator including a capacitor which is discharged through a thyristor
US4628213A (en) * 1985-08-09 1986-12-09 General Signal Corporation Electronic circuits for driving bells or electromagnetic devices
KR960003660B1 (en) * 1993-07-24 1996-03-21 국방과학연구소 Electric-optical q-switching drive-circuit for photoprism laser resonator
AU718281B2 (en) * 1998-03-25 2000-04-13 Robert Bosch Gmbh A drive circuit for a sounder

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2759179A (en) * 1952-12-05 1956-08-14 Bell Telephone Labor Inc Ringing circuit
US2723386A (en) * 1954-05-05 1955-11-08 Bendix Aviat Corp Sonic transducer with mechanical motion transformer
NL283356A (en) * 1961-09-18
GB989232A (en) * 1961-12-08 1965-04-14 Post Office Improvements in or relating to signalling circuits
US3506881A (en) * 1966-12-12 1970-04-14 Thomas P Leary Variable time interval cable release for motion picture cameras
US3593185A (en) * 1969-04-17 1971-07-13 Raven Ind Inc Temperature-compensated unijunction transistor relaxation oscillator with switched reference voltage
US3601714A (en) * 1970-02-11 1971-08-24 Gen Motors Corp Unijunction relaxation oscillator providing linear potential to frequency conversion

Also Published As

Publication number Publication date
US3868683A (en) 1975-02-25
AU3866972A (en) 1973-08-09

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