GB1093076A - An electric circuit arrangement for remote supervision of heating plants - Google Patents
An electric circuit arrangement for remote supervision of heating plantsInfo
- Publication number
- GB1093076A GB1093076A GB47396/64A GB4739664A GB1093076A GB 1093076 A GB1093076 A GB 1093076A GB 47396/64 A GB47396/64 A GB 47396/64A GB 4739664 A GB4739664 A GB 4739664A GB 1093076 A GB1093076 A GB 1093076A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- resistors
- resistance
- ohmmeter
- contacts
- 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
- 238000010438 heat treatment Methods 0.000 title 1
- 239000007788 liquid Substances 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Alarm Systems (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1,093,076. Supervising circuits. A. V. HILLBERG. Nov. 20, 1964 [Nov. 22, 1963], No. 47396/64. Heading G4H. A supervising circuit comprises a number of resistors 10-13 adapted to be connected into or disconnected from a closed electric circuit depending upon the state of equipment to be supervised and a contlrol unit adapted to give an alarm when the total resistance of the circuit rises or falls below predetermined levels. The resistors 10-13 are short-circuited by contacts 14-17 under certain conditions. At the central station the lines are normally connected to relay coil 22. The contact of this relay is normally balanced between contacts 27 by the attraction of coil 23. An adjustable resistor 18 facilitates the balancing. If the current in coil 22 changes owing to a change of resistance in the circuit A the contact moves and lights a lamp 26. The operator at the central station then transfers contacts to apply an ohmmeter or bridge 28 to the circuit to measure the resistance. The resistors may all have different values so that the value of circuit resistance indicates which of the resistors 10- 13 has been cut-out or put into the circuit. Upper and lower threshold indications may be given by separate relays. In another form the threshold relays are replaced by Schmitt triggers, each comprising a pair of transistors. In outputs of the triggers are connected to enable a transistor multivibrator circuit which causes a lamp to flash when either predetermined level has been passed. The circuit may be used to indicate liquid level, the resistors being connected in turn in a series circuit as the level changes. An alarm is given if upper or lower limits are passed and the ohmmeter may be used at any time to measure the level. The current for the resistors 10-13 passes through a diode 59. Another chain of resistors 60, 61 is connected in parallel with the first through an oppositely poled diode 64. The resistance of this chain can be measured by the ohmmeter 28 in the same way as the first, upon reversing the polarity of the ohmmeter.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1290763 | 1963-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1093076A true GB1093076A (en) | 1967-11-29 |
Family
ID=20296505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB47396/64A Expired GB1093076A (en) | 1963-11-22 | 1964-11-20 | An electric circuit arrangement for remote supervision of heating plants |
Country Status (7)
| Country | Link |
|---|---|
| AT (1) | AT270946B (en) |
| BE (1) | BE656051A (en) |
| CH (1) | CH426560A (en) |
| DE (1) | DE1454421A1 (en) |
| GB (1) | GB1093076A (en) |
| NL (1) | NL6413585A (en) |
| NO (1) | NO116978B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2219852A1 (en) * | 1973-03-01 | 1974-09-27 | Daimler Benz Ag | |
| CN109579108A (en) * | 2018-12-04 | 2019-04-05 | 华电电力科学研究院有限公司 | A kind of high back pressure coupling great temperature difference heat supply system and operation method for air cooling unit |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106839070B (en) * | 2017-03-10 | 2022-04-01 | 温岭市惠师登精密模具有限公司 | Directional multi-liquid fuel type heating lamp |
-
1964
- 1964-11-19 NO NO155645A patent/NO116978B/no unknown
- 1964-11-20 AT AT982464A patent/AT270946B/en active
- 1964-11-20 CH CH1502364A patent/CH426560A/en unknown
- 1964-11-20 BE BE656051D patent/BE656051A/xx unknown
- 1964-11-20 GB GB47396/64A patent/GB1093076A/en not_active Expired
- 1964-11-21 DE DE19641454421 patent/DE1454421A1/en active Pending
- 1964-11-23 NL NL6413585A patent/NL6413585A/xx unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2219852A1 (en) * | 1973-03-01 | 1974-09-27 | Daimler Benz Ag | |
| CN109579108A (en) * | 2018-12-04 | 2019-04-05 | 华电电力科学研究院有限公司 | A kind of high back pressure coupling great temperature difference heat supply system and operation method for air cooling unit |
| CN109579108B (en) * | 2018-12-04 | 2023-08-29 | 华电电力科学研究院有限公司 | High-backpressure coupling large-temperature-difference heating system for air cooling unit and operation method |
Also Published As
| Publication number | Publication date |
|---|---|
| NL6413585A (en) | 1965-05-24 |
| DE1454421A1 (en) | 1969-01-09 |
| CH426560A (en) | 1966-12-15 |
| NO116978B (en) | 1969-06-16 |
| AT270946B (en) | 1969-05-12 |
| BE656051A (en) | 1965-03-16 |
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