GB947489A - A low pressure warning alarm - Google Patents
A low pressure warning alarmInfo
- Publication number
- GB947489A GB947489A GB35955/60A GB3595560A GB947489A GB 947489 A GB947489 A GB 947489A GB 35955/60 A GB35955/60 A GB 35955/60A GB 3595560 A GB3595560 A GB 3595560A GB 947489 A GB947489 A GB 947489A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- chamber
- piston
- spring
- bell
- 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
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B9/00—Component parts for respiratory or breathing apparatus
- A62B9/006—Indicators or warning devices, e.g. of low pressure, contamination
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
947,489. Respiratory appliances. E. H. REPLOGIE. Oct. 20, 1960 [Feb. 1, 1960], No. 35955/60. Heading A5T. [Also in Division G1] A pressure alarm arranged in the supply line to breathing equipment comprises a chamber 25 supplied with pressure fluid from pipes 18, 19 through filter 20 (Figs. 1 and 3) and passage 22 and containing a diaphragm 63 with holes 71 naturally biased as shown in Figs. 3 and 4 so that a resilient pad 64 closes a restricted orifice 33. If the pressure in chamber 25 drops below a predetermined level a spring 75 urges a plunger 28 against an inclined surface 69 to bias the diaphragm 63 as shown in Fig. 7 and thus allows pressure fluid to pass through a restricted orifice 33 into a chamber 25. When pressure in chamber 25 is sufficiently high it displaces a pad 55 fixed to a piston 51 to open a passage 34. The pressure fluid then acts on the whole of the end of piston 51 causing it to move quickly outwards opening exhaust ports 58 in communication through apertures 60 with atmosphere and also causes piston 51 to strike a bell 61. As the air escapes through ports 58 a spring 52 urges piston 51 inwards until pressure has again built up sufficiently high in chamber 25 and the bell striking operation is repeated. The pressure at which the bell first strikes can be varied by altering the force of spring 75 with retainer 78.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US5985A US3056378A (en) | 1960-02-01 | 1960-02-01 | Fluid motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB947489A true GB947489A (en) | 1964-01-22 |
Family
ID=21718699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB35955/60A Expired GB947489A (en) | 1960-02-01 | 1960-10-20 | A low pressure warning alarm |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3056378A (en) |
| GB (1) | GB947489A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3244196A (en) * | 1963-04-03 | 1966-04-05 | Edward H Replogle | Sonic reserve alarm for air-breathing apparatus |
| US3224409A (en) * | 1963-11-21 | 1965-12-21 | Fluid Power Inc | Low pressure alarm assembly |
| DE1952121C3 (en) * | 1970-11-02 | 1974-03-07 | Draegerwerk Ag, 2400 Luebeck | Warning signal device for breathing apparatus with pressurized gas supply |
| US3719160A (en) * | 1971-03-01 | 1973-03-06 | Under Sea Industries | Audio reserve alarm mechanism for self-contained breathing apparatus |
| CS162633B4 (en) * | 1971-06-15 | 1975-07-15 | ||
| US4095667A (en) * | 1977-01-19 | 1978-06-20 | Joseph Mahig | Portable underwater signalling transducer |
| US5040477A (en) * | 1990-03-23 | 1991-08-20 | Schiffmacher John A | Warning device for compressed air tanks |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1126297A (en) * | 1913-01-02 | 1915-01-26 | Harry E W Sauveur | Fluid-pressure-operated alarm device. |
| US1929019A (en) * | 1928-07-21 | 1933-10-03 | American Gas Accumulator Compa | Apparatus for producing signals |
-
1960
- 1960-02-01 US US5985A patent/US3056378A/en not_active Expired - Lifetime
- 1960-10-20 GB GB35955/60A patent/GB947489A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3056378A (en) | 1962-10-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB793289A (en) | Improvements in automatic guns of the gas tap type | |
| GB1305004A (en) | ||
| GB947489A (en) | A low pressure warning alarm | |
| GB968108A (en) | Control device using fluid amplifier | |
| GB565291A (en) | Improvements in fluid valves | |
| GB936543A (en) | Compressed air valve for air blast electric breakers | |
| GB892201A (en) | An acoustic warning device for attachment to the valve of a pneumatic tyre to indicate loss of pressure | |
| GB1107268A (en) | Fluid flow switching device | |
| GB815186A (en) | A multiple valve for air and gas compressors | |
| GB911405A (en) | Improvements in and relating to scent sprays | |
| GB829542A (en) | Improvements in and relating to acetylene generators | |
| GB862303A (en) | Improvements in or relating to shock alleviators | |
| GB879719A (en) | Automatically acting valve for the transfer of liquid between gaseous fluid zones at differing pressures | |
| GB1359976A (en) | Mine detonating device | |
| FR2447476A1 (en) | Deceleration of hydraulic equipment - uses spring loaded piston which successively masks holes in cylinder wall | |
| GB702031A (en) | An improved gas burner | |
| GB662119A (en) | Improvements in or relating to connectors for air pumps | |
| GB902855A (en) | Improvements in fire extinguishers | |
| GB830673A (en) | Improvements in, or relating to, spray nozzles | |
| GB564557A (en) | Improvements in hydraulic nozzles | |
| FR1248449A (en) | Jackhammer operated with a gaseous pressure medium, for example with compressed air | |
| BE581453A (en) | Jackhammer operated with a gaseous pressure medium, for example with compressed air. | |
| GB1356387A (en) | Pilot pressure operated pneumatic valves | |
| ES339029A1 (en) | Improvements in or relating to Aerosol Distributor Appliances. | |
| GB556583A (en) | Improvements in alarm apparatus operated by air or gas under pressure |