GB191028793A - Improvements in Electric Horns. - Google Patents

Improvements in Electric Horns.

Info

Publication number
GB191028793A
GB191028793A GB191028793DA GB191028793A GB 191028793 A GB191028793 A GB 191028793A GB 191028793D A GB191028793D A GB 191028793DA GB 191028793 A GB191028793 A GB 191028793A
Authority
GB
United Kingdom
Prior art keywords
push
circuit
electric horns
davy
dec
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
Inventor
William James Davy
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
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of GB191028793A publication Critical patent/GB191028793A/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
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means
    • G10K9/15—Self-interrupting arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Push-Button Switches (AREA)

Abstract

28,793. Davy, W. J. Dec. 10. Electro magnetic interrupters.-The make- and-break armature of an electric diaphragm horn is provided with two or more interrupting contacts either of which may be put in circuit at will to produce interruptions of different frequencies. Push-button switches. -A push-button switch for controlling the circuit connexions above mentioned is formed with contact-rings w, x adapted to be engaged by a sliding spring-controlled metal plug u.
GB191028793D 1910-12-10 1910-12-10 Improvements in Electric Horns. Expired GB191028793A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191028793T 1910-12-10

Publications (1)

Publication Number Publication Date
GB191028793A true GB191028793A (en) 1911-12-11

Family

ID=32495519

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191028793D Expired GB191028793A (en) 1910-12-10 1910-12-10 Improvements in Electric Horns.

Country Status (1)

Country Link
GB (1) GB191028793A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0025154A2 (en) * 1979-09-07 1981-03-18 Nippondenso Co., Ltd. Electric alarm device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0025154A2 (en) * 1979-09-07 1981-03-18 Nippondenso Co., Ltd. Electric alarm device
EP0025154A3 (en) * 1979-09-07 1981-09-09 Nippondenso Co., Ltd. Electric alarm device

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