GB794249A - Acoustic alarm device - Google Patents

Acoustic alarm device

Info

Publication number
GB794249A
GB794249A GB31297/56A GB3129756A GB794249A GB 794249 A GB794249 A GB 794249A GB 31297/56 A GB31297/56 A GB 31297/56A GB 3129756 A GB3129756 A GB 3129756A GB 794249 A GB794249 A GB 794249A
Authority
GB
United Kingdom
Prior art keywords
spring
gas
pressure
plunger
valve
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
GB31297/56A
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.)
Svenska AB Gasaccumulator
Original Assignee
Svenska AB Gasaccumulator
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 Svenska AB Gasaccumulator filed Critical Svenska AB Gasaccumulator
Publication of GB794249A publication Critical patent/GB794249A/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
    • G10K5/00—Whistles

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

794,249. Pressure alarms. SVENSKA AKTIEBOLAGET GASACCUMULATOR. Oct. 15, 1956 [Oct. 13, 1955], No. 31297/56. Class 106 (2). An acoustic alarm device for indicating decrease of pressure of a gas in a container 1 below a predetermined level having a valve 2 closed by the gas pressure, a spring-urged plunger 5 adapted to open the valve, and a sound-producing member 9 has the plunger in the form of a piston 11 slidable in the spring chamber and sealing it from the valve chamber, a passage 8 being provided between the upper and lower faces of the piston 11 to admit only the amount of gas required for the alarm. The device is threadedly connected with the container 1. The pressure of gas in the container together with the action of a relatively weak spring 3 serves to hold the valve 2 closed against the action of the plunger 5 acted on by a spring 4. A screw 6 regulates the tension in the spring 4 so that the alarm device 9 responds at the desired pressure. The plunger 5 is in the form of a piston having a tight fit against the wall of the spring chamber, this being obtained by means of an elastic disc 7, The spring chamber is connected to the sound. producing pipe 9 by means of a boring 10 larger than the boring 8, which allows just sufficient gas to pass to operate the alarm,
GB31297/56A 1955-10-13 1956-10-15 Acoustic alarm device Expired GB794249A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE794249X 1955-10-13

Publications (1)

Publication Number Publication Date
GB794249A true GB794249A (en) 1958-04-30

Family

ID=6710482

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31297/56A Expired GB794249A (en) 1955-10-13 1956-10-15 Acoustic alarm device

Country Status (1)

Country Link
GB (1) GB794249A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2200455A (en) * 1987-01-23 1988-08-03 Price E J Valve devices for use in measuring or controlling gas-pressure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2200455A (en) * 1987-01-23 1988-08-03 Price E J Valve devices for use in measuring or controlling gas-pressure

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