GB1006208A - Heat detecting apparatus - Google Patents
Heat detecting apparatusInfo
- Publication number
- GB1006208A GB1006208A GB4377663A GB4377663A GB1006208A GB 1006208 A GB1006208 A GB 1006208A GB 4377663 A GB4377663 A GB 4377663A GB 4377663 A GB4377663 A GB 4377663A GB 1006208 A GB1006208 A GB 1006208A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- ambient
- nov
- temperature
- charge
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/04—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having negative temperature coefficient
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electromagnetism (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- General Physics & Mathematics (AREA)
- Fire-Detection Mechanisms (AREA)
- Burglar Alarm Systems (AREA)
Abstract
1,006,208. Temperature alarms. SPECIALTIES DEVELOPMENT CORPORATION. Nov. 6, 1963 [Nov. 20, 1962], No. 43776/63. Heading G4N. [Also in Division H1] Apparatus for detecting an increase in temperature above a normal ambient comprises an element (see Division H1) capable of storing a charge only when heated above the ambient; means for applying a direct voltage across the electrodes of the element; and means for indicating when a charge is stored in the element. As described, Fig. 1, an oscillator 15 pulses relay 24 to connect the element 10, which is in the form of a coaxial cable, alternately to the D.C. supply 11 and the relay 27. When the ambient temperature is exceeded the element is alternately charged and discharged holding relay 27 energized and completing the circuit to indicator 31. In an alternative form, Fig. 4 (not shown). The relay 24 is omitted and the element 10 is connected via a diode to an A.C. supply, the detector relay being permanently connected to the element. Specification 953,166 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US23897962A | 1962-11-20 | 1962-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1006208A true GB1006208A (en) | 1965-09-29 |
Family
ID=22900126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4377663A Expired GB1006208A (en) | 1962-11-20 | 1963-11-06 | Heat detecting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1006208A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4628301A (en) * | 1983-11-04 | 1986-12-09 | Graviner Limited | Electrical circuit arrangements |
-
1963
- 1963-11-06 GB GB4377663A patent/GB1006208A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4628301A (en) * | 1983-11-04 | 1986-12-09 | Graviner Limited | Electrical circuit arrangements |
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