GB2321995A - Propellant powered alarms - Google Patents

Propellant powered alarms Download PDF

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Publication number
GB2321995A
GB2321995A GB9802352A GB9802352A GB2321995A GB 2321995 A GB2321995 A GB 2321995A GB 9802352 A GB9802352 A GB 9802352A GB 9802352 A GB9802352 A GB 9802352A GB 2321995 A GB2321995 A GB 2321995A
Authority
GB
United Kingdom
Prior art keywords
actuator
propellant
discharge
produce
tracer
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.)
Granted
Application number
GB9802352A
Other versions
GB2321995B (en
GB9802352D0 (en
Inventor
John Alfred Worthington
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB9802352D0 publication Critical patent/GB9802352D0/en
Publication of GB2321995A publication Critical patent/GB2321995A/en
Application granted granted Critical
Publication of GB2321995B publication Critical patent/GB2321995B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B15/00—Identifying, scaring or incapacitating burglars, thieves or intruders, e.g. by explosives
    • G08B15/02—Identifying, scaring or incapacitating burglars, thieves or intruders, e.g. by explosives with smoke, gas, or coloured or odorous powder or liquid
    • 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
    • G10K9/02—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by gas; e.g. suction operated
    • G10K9/04—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by gas; e.g. suction operated by compressed gases, e.g. compressed air

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

A personal alarm which has added features for the discharge of fluids 7 which when reaching the atmosphere produce a foul odour and spray out a tracer element which can be used to identify an agressor. The discharge of the fluids and production of a disorientating sound are achieved simultaneously with the depression of an actuator 3.

Description

Improvements to Propellant Powered Alarms This invention relates to propellant powered alarms which when activated produce a high pitched sound whilst simultaneously emitting a fluid such as a tracer which is capable of being used forensically.
Propellant powered alarms are in common use as personal protection devices but they only produce a high pitched disorientating sound and this invention relates to increasing their versatility and deterrent effect by incorporating a facility to discharge a forensic tracer into the immediate surroundings whilst simultaneously emitting a high pitched screech.
Incorporated with this dual function could also be the discharge of a fluid carrying a foul odour.
A small amount of the forensic trace element found on the clothing or skin of an aggressor could provide evidence leading to conviction.
Figure 1 shows a propellant powered alarm which also has the facility to discharge fluids capable of producing a foul odour and acting as a tracer. When the actuator 3 is depressed a mixture of gaseous and liquid propellant, together with fluid for producing a foul odour and tracer 7, pass from the canister up the tube 4 and into the housing 10. The propellant and liquid flows into the housing at 8 from where it passes into an annular chamber 9. The gaseous element of the discharge escapes past diaphragm 5 to produce a sound whilst the liquid accumulated in chamber 7 passes under the influence of propellant pressure through hole 1 and into tube 2 and reaches the atmosphere at exit 6 where the odour producing fluid evaporates to produce a foul smell and the liquid tracer which is in the form of small particles can settle on the body or clothing of an agressor. Thus as a result of a single depression of actuator 3 there is simultaneous discharge of tracer and odour producing fluid together with a high pitched blast of sound.

Claims (3)

Claims
1. A personal deterrent which on depression of the actuator simultanously produces a high pitched sound and discharge of fluid such as those to produce an odour and tracer.
2. An alarm as in claim 1 where the liquid element is sealed in a pressurised container together with a liquified propellant and the two are simultaneously discharged from the container into the actuator.
3. An actuator which receives the gaseous and liquid constituents as in claim 2 having a discharge tube through which the pressurised fluid flows from any point in the annular chamber to any suitable exit point on the actuator surface whilst the gaseous part of the propellant passes over the diaphragm in order to produce a high pitched sound.
GB9802352A 1997-02-07 1998-02-04 Improvements to propellant powered alarms Expired - Fee Related GB2321995B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB9702581.1A GB9702581D0 (en) 1997-02-07 1997-02-07 Improvements to propellant powered alarms

Publications (3)

Publication Number Publication Date
GB9802352D0 GB9802352D0 (en) 1998-04-01
GB2321995A true GB2321995A (en) 1998-08-12
GB2321995B GB2321995B (en) 2001-06-20

Family

ID=10807284

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB9702581.1A Pending GB9702581D0 (en) 1997-02-07 1997-02-07 Improvements to propellant powered alarms
GB9802352A Expired - Fee Related GB2321995B (en) 1997-02-07 1998-02-04 Improvements to propellant powered alarms

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB9702581.1A Pending GB9702581D0 (en) 1997-02-07 1997-02-07 Improvements to propellant powered alarms

Country Status (1)

Country Link
GB (2) GB9702581D0 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2395045A (en) * 2002-10-02 2004-05-12 Russell Hanabusa Attack deterrent
GB2459513A (en) * 2008-04-26 2009-10-28 John Alfred Worthington Electrically powered alarm sprays odorous ultraviolet fluid at an aggressor
GB2579666A (en) * 2018-12-12 2020-07-01 Alfred Worthington John Twin discharge aerosol container

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2127202A (en) * 1982-08-31 1984-04-04 Strongman Security Products Li Alarm device
US4449474A (en) * 1982-08-13 1984-05-22 Suzi Stone Enterprises, Inc. Personal security device
US5489045A (en) * 1993-02-17 1996-02-06 Jennings; Roy H. Door alarm/sprayer with options

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4449474A (en) * 1982-08-13 1984-05-22 Suzi Stone Enterprises, Inc. Personal security device
GB2127202A (en) * 1982-08-31 1984-04-04 Strongman Security Products Li Alarm device
US5489045A (en) * 1993-02-17 1996-02-06 Jennings; Roy H. Door alarm/sprayer with options

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2395045A (en) * 2002-10-02 2004-05-12 Russell Hanabusa Attack deterrent
GB2459513A (en) * 2008-04-26 2009-10-28 John Alfred Worthington Electrically powered alarm sprays odorous ultraviolet fluid at an aggressor
GB2579666A (en) * 2018-12-12 2020-07-01 Alfred Worthington John Twin discharge aerosol container

Also Published As

Publication number Publication date
GB9702581D0 (en) 1997-03-26
GB2321995B (en) 2001-06-20
GB9802352D0 (en) 1998-04-01

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Legal Events

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

Effective date: 20170204