GB1108521A - Improvements in fog horns - Google Patents

Improvements in fog horns

Info

Publication number
GB1108521A
GB1108521A GB28565A GB28565A GB1108521A GB 1108521 A GB1108521 A GB 1108521A GB 28565 A GB28565 A GB 28565A GB 28565 A GB28565 A GB 28565A GB 1108521 A GB1108521 A GB 1108521A
Authority
GB
United Kingdom
Prior art keywords
unit
foghorn
fog horns
units
stacked
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
GB28565A
Inventor
Michael Hugh Fountain
Ronald Hastings Rackham
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.)
Tannoy Ltd
Original Assignee
Tannoy 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 Tannoy Ltd filed Critical Tannoy Ltd
Priority to GB28565A priority Critical patent/GB1108521A/en
Publication of GB1108521A publication Critical patent/GB1108521A/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
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
    • G10K11/025—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators horns for impedance matching
    • 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
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

1,108,521. Fog horns. TANNOY Ltd. 26 Sept., 1966 [30 June, 1965], No. 285/65. Heading G5J. [Also in Division H4] The casing of a foghorn unit has upper and lower surfaces so shaped that when such a unit is stacked with other similar units, its lower surface 2 in combination with the upper surface (1) of the unit below it (not shown) will form an annular horn 12 which is fed with sound from an oscillator-controlled electromagnetic unit 4 in the foghorn unit. Any number of such units may be stacked above one another as required, a dummy unit being required at the base to complete the annular horn for the adjacent unit.
GB28565A 1965-06-30 1965-06-30 Improvements in fog horns Expired GB1108521A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB28565A GB1108521A (en) 1965-06-30 1965-06-30 Improvements in fog horns

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB28565A GB1108521A (en) 1965-06-30 1965-06-30 Improvements in fog horns

Publications (1)

Publication Number Publication Date
GB1108521A true GB1108521A (en) 1968-04-03

Family

ID=9701678

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28565A Expired GB1108521A (en) 1965-06-30 1965-06-30 Improvements in fog horns

Country Status (1)

Country Link
GB (1) GB1108521A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0474029A2 (en) * 1990-09-07 1992-03-11 Federal Signal Corporation Omnidirectional modular siren

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0474029A2 (en) * 1990-09-07 1992-03-11 Federal Signal Corporation Omnidirectional modular siren
EP0474029A3 (en) * 1990-09-07 1992-12-02 Federal Signal Corporation Omnidirectional modular siren

Similar Documents

Publication Publication Date Title
SE326929B (en)
GB1108521A (en) Improvements in fog horns
CA710089A (en) Sounding buoy
AU423333B2 (en) Particle board
CA720601A (en) Gas etching
CA670144A (en) Electronic ignition
CA724810A (en) Comparison circuit arrangements
CA724787A (en) Electronic ignition system
CA704550A (en) Electronic oscillators
AU973166A (en) Highspeed electronic keyboard assembly
AU1429466A (en) Particle board
AU278929B2 (en) Macks tic escapement
AU283957B2 (en) Electronic signal compressor
AU263818B2 (en) Resins and laminates produced therefrom
CA723906A (en) Electronic flash-photography
AU406262B2 (en) Logic circuit arrangements
CA720631A (en) Music enhancing systems
CA740567A (en) Electronic governor
CA669096A (en) Electronic ignition system
CA669493A (en) Electronic ignition system
CA714709A (en) Ignition circuit
CA656464A (en) Explosive hole forming
CA716218A (en) Protective circuit arrangements
CA714167A (en) Protective circuit arrangements
CA706959A (en) Phosphorus-containing spirobi(meta-dioxane) resins