GB885073A - Audible warning devices - Google Patents

Audible warning devices

Info

Publication number
GB885073A
GB885073A GB2722159A GB2722159A GB885073A GB 885073 A GB885073 A GB 885073A GB 2722159 A GB2722159 A GB 2722159A GB 2722159 A GB2722159 A GB 2722159A GB 885073 A GB885073 A GB 885073A
Authority
GB
United Kingdom
Prior art keywords
electromagnets
alternately
aug
energized
bells
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
GB2722159A
Inventor
Walford John Louis Simons
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.)
Lucas Support Services Ltd
Original Assignee
Rotax 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 Rotax Ltd filed Critical Rotax Ltd
Priority to GB2722159A priority Critical patent/GB885073A/en
Publication of GB885073A publication Critical patent/GB885073A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)

Abstract

885,073. Electric bells; supply circuits. ROTAX Ltd. Aug. 4, 1960 [Aug. 10, 1959], No. 27221/59. Classes 13 and 118. A support 4 carries two bell domes 5 and 6 of different resonant frequencies and two electromagnets 7 and 8, which are arranged to be energized alternately and have a common armature 10 adapted to strike the two bell domes 5 and 6 alternately as the electromagnets 7 and 8 are alternately energized. The supply circuit, Fig. 3, for the electromagnets 7 and 8 includes a multivibrator 24, a source of direct or rectified alternating current being connected to terminals 21 and 22. When the bells are switched off by changing over relay contacts 23, 27, 28 and 29, current passes through a variable resistor 30 to the electromagnet coils 7 and 8 in series, preventing icing of the moving parts at low ambient temperatures.
GB2722159A 1959-08-10 1959-08-10 Audible warning devices Expired GB885073A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2722159A GB885073A (en) 1959-08-10 1959-08-10 Audible warning devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2722159A GB885073A (en) 1959-08-10 1959-08-10 Audible warning devices

Publications (1)

Publication Number Publication Date
GB885073A true GB885073A (en) 1961-12-20

Family

ID=10256113

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2722159A Expired GB885073A (en) 1959-08-10 1959-08-10 Audible warning devices

Country Status (1)

Country Link
GB (1) GB885073A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0045539A2 (en) * 1980-07-30 1982-02-10 Philips Electronics Uk Limited Telephone bell assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0045539A2 (en) * 1980-07-30 1982-02-10 Philips Electronics Uk Limited Telephone bell assembly
EP0045539A3 (en) * 1980-07-30 1982-12-01 Philips Electronics Uk Limited Telephone bell assembly

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