FR671928A - Perfectionnements aux appareils avertisseurs - Google Patents

Perfectionnements aux appareils avertisseurs

Info

Publication number
FR671928A
FR671928A FR671928DA FR671928A FR 671928 A FR671928 A FR 671928A FR 671928D A FR671928D A FR 671928DA FR 671928 A FR671928 A FR 671928A
Authority
FR
France
Prior art keywords
warning devices
warning
devices
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
Other languages
English (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.)
SPARKS WHITHINGTON Co
Original Assignee
SPARKS WHITHINGTON Co
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 SPARKS WHITHINGTON Co filed Critical SPARKS WHITHINGTON Co
Application granted granted Critical
Publication of FR671928A publication Critical patent/FR671928A/fr
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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR671928D 1929-03-22 1929-03-22 Perfectionnements aux appareils avertisseurs Expired FR671928A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR671928T 1929-03-22

Publications (1)

Publication Number Publication Date
FR671928A true FR671928A (fr) 1929-12-20

Family

ID=9017227

Family Applications (1)

Application Number Title Priority Date Filing Date
FR671928D Expired FR671928A (fr) 1929-03-22 1929-03-22 Perfectionnements aux appareils avertisseurs

Country Status (1)

Country Link
FR (1) FR671928A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5488627A (en) * 1993-11-29 1996-01-30 Lexmark International, Inc. Spread spectrum clock generator and associated method
US5872807A (en) * 1993-11-29 1999-02-16 Lexmark International, Inc. Spread spectrum clock generator and associated method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5488627A (en) * 1993-11-29 1996-01-30 Lexmark International, Inc. Spread spectrum clock generator and associated method
US5867524A (en) * 1993-11-29 1999-02-02 Lexmark International Inc. Spread spectrum clock generator and associated method
US5872807A (en) * 1993-11-29 1999-02-16 Lexmark International, Inc. Spread spectrum clock generator and associated method

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