GB2079511B - Sound generator - Google Patents

Sound generator

Info

Publication number
GB2079511B
GB2079511B GB8020721A GB8020721A GB2079511B GB 2079511 B GB2079511 B GB 2079511B GB 8020721 A GB8020721 A GB 8020721A GB 8020721 A GB8020721 A GB 8020721A GB 2079511 B GB2079511 B GB 2079511B
Authority
GB
United Kingdom
Prior art keywords
sound generator
sound
generator
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
GB8020721A
Other versions
GB2079511A (en
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.)
Dale Mansfield Ltd
Original Assignee
Dale Mansfield 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 Dale Mansfield Ltd filed Critical Dale Mansfield Ltd
Priority to GB8020721A priority Critical patent/GB2079511B/en
Priority to DE19813120236 priority patent/DE3120236A1/en
Publication of GB2079511A publication Critical patent/GB2079511A/en
Application granted granted Critical
Publication of GB2079511B publication Critical patent/GB2079511B/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/22—Equipment for preventing the formation of, or for removal of, dust
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
    • E21F17/18—Special adaptations of signalling or alarm devices
    • 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
    • G10K9/10—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by mechanical means only
GB8020721A 1980-06-25 1980-06-25 Sound generator Expired GB2079511B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB8020721A GB2079511B (en) 1980-06-25 1980-06-25 Sound generator
DE19813120236 DE3120236A1 (en) 1980-06-25 1981-05-21 HYDRAULIC TONE GENERATOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8020721A GB2079511B (en) 1980-06-25 1980-06-25 Sound generator

Publications (2)

Publication Number Publication Date
GB2079511A GB2079511A (en) 1982-01-20
GB2079511B true GB2079511B (en) 1984-08-08

Family

ID=10514295

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8020721A Expired GB2079511B (en) 1980-06-25 1980-06-25 Sound generator

Country Status (2)

Country Link
DE (1) DE3120236A1 (en)
GB (1) GB2079511B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3235325A1 (en) * 1981-10-13 1983-04-21 Coal Industry (Patents) Ltd., London LIQUID SUPPLY SYSTEM FOR ROTATING CUTTING HEADS FOR MINING MACHINES WITH ROTATING CUTTING HEADS WITH LIQUID SUPPLYING SYSTEMS
EP0108174A1 (en) * 1982-11-02 1984-05-16 Wultex Machine Company Limited Alarms
GB2133191A (en) * 1983-01-07 1984-07-18 Graham Clenton Rawlins Warning alarm for mining machinery

Also Published As

Publication number Publication date
GB2079511A (en) 1982-01-20
DE3120236A1 (en) 1982-05-13

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee