GB535080A - Improvements in automatic control or alarm devices - Google Patents
Improvements in automatic control or alarm devicesInfo
- Publication number
- GB535080A GB535080A GB2804739A GB2804739A GB535080A GB 535080 A GB535080 A GB 535080A GB 2804739 A GB2804739 A GB 2804739A GB 2804739 A GB2804739 A GB 2804739A GB 535080 A GB535080 A GB 535080A
- Authority
- GB
- United Kingdom
- Prior art keywords
- variable
- accompanied
- lever
- members
- bar
- 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
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/275—Control of temperature characterised by the use of electric means with sensing element expanding, contracting, or fusing in response to changes of temperature
- G05D23/27535—Details of the sensing element
- G05D23/27541—Details of the sensing element using expansible solid
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
535,080. Mechanical relays. LOBLEY, A. G., BIRMINGHAM ELECTRIC' FURNACES Ltd., FENNELL, C. A. F., and FOSTER INSTRUMENT CO., LTD. Oct. 17, 1939, No. 28047. [Class 118(ii)] In a mechanical relay device in which a pointer A moved in accordance with a'variable such as temperature is periodically depressed by a bar 2 and, if deflected, causes the depression of one or other of two members 6 which control the variable and/or give an alarm as described in Specification 441,640, the position of the members is adjustable by the rotation of a shaft 13 by means of a key (not shown) designed so that its engagement with the shaft is accompanied by movement against a spring of a sleeve 28 connected to a rod 32 which operates via a lever 24 on a rod 21 which preventsdepression of the bar 2. The lever may also move a mercury switch 36 for interrupting the current of the primary instrument. The invention may be incorporated in a system such as that described in Specification 521,793, [Group XXXV], in which adjustment of means for controlling a variable is accompanied by a corresponding adjustment of a monitoring and recording device. The latter device in the present case would be adjusted by means of a bevel wheel 41.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2804739A GB535080A (en) | 1939-10-17 | 1939-10-17 | Improvements in automatic control or alarm devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2804739A GB535080A (en) | 1939-10-17 | 1939-10-17 | Improvements in automatic control or alarm devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB535080A true GB535080A (en) | 1941-03-27 |
Family
ID=10269397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2804739A Expired GB535080A (en) | 1939-10-17 | 1939-10-17 | Improvements in automatic control or alarm devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB535080A (en) |
-
1939
- 1939-10-17 GB GB2804739A patent/GB535080A/en not_active Expired
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