GB371781A - Improvements in electric sound warning devices - Google Patents

Improvements in electric sound warning devices

Info

Publication number
GB371781A
GB371781A GB33358/31A GB3335831A GB371781A GB 371781 A GB371781 A GB 371781A GB 33358/31 A GB33358/31 A GB 33358/31A GB 3335831 A GB3335831 A GB 3335831A GB 371781 A GB371781 A GB 371781A
Authority
GB
United Kingdom
Prior art keywords
plate
warning devices
sound warning
electric sound
electric
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
GB33358/31A
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.)
Robert Bosch AG
Robert Bosch GmbH
Original Assignee
Robert Bosch AG
Robert Bosch GmbH
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 Robert Bosch AG, Robert Bosch GmbH filed Critical Robert Bosch AG
Publication of GB371781A publication Critical patent/GB371781A/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
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
    • G10K9/22—Mountings; Casings

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)

Abstract

371,781. Electric horns. BOSCH AKT.- GES., R., 4, Militõrstrasse, Stuttgart, Germany. Dec. 2, 1931, No. 33358. Convention date, Dec. - 12, 1930. Addition to 356,535. [Class 13.] The aperture e in the domed front plate b of an electric horn, described in the parent Specification, is provided with a removable cover-plate d so proportioned that only that part of the horn which is to be adjustable is accessible from the outside of the plate b. The plate d may be secured to the plate b by two small screws g or one small screw and one rivet. The plate d may carry a characteristic mark. Specification 349,183 is referred to.
GB33358/31A 1930-12-12 1931-12-02 Improvements in electric sound warning devices Expired GB371781A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE371781X 1930-12-12

Publications (1)

Publication Number Publication Date
GB371781A true GB371781A (en) 1932-04-28

Family

ID=6328502

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33358/31A Expired GB371781A (en) 1930-12-12 1931-12-02 Improvements in electric sound warning devices

Country Status (1)

Country Link
GB (1) GB371781A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0036722B1 (en) * 1980-03-21 1985-06-05 LUCAS INDUSTRIES public limited company Electromagnetic horn

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0036722B1 (en) * 1980-03-21 1985-06-05 LUCAS INDUSTRIES public limited company Electromagnetic horn

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