GB647505A - Improvements in or relating to temperature sensitive electric alarm or cut-off means - Google Patents
Improvements in or relating to temperature sensitive electric alarm or cut-off meansInfo
- Publication number
- GB647505A GB647505A GB3018447A GB3018447A GB647505A GB 647505 A GB647505 A GB 647505A GB 3018447 A GB3018447 A GB 3018447A GB 3018447 A GB3018447 A GB 3018447A GB 647505 A GB647505 A GB 647505A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- cam
- spirals
- secured
- taylor
- 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
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
- H01H37/56—Thermally-sensitive members actuated due to deflection of bimetallic element having spirally wound or helically wound bimetallic element
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Thermally Actuated Switches (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
647,505. Thermal switches. TAYLOR, J. L., and TAYLOR, A. E. Nov. 13, 1948, No. 30184/47. [Class 38(v)] [Also in Group XXI] A thermal switch, in a system (see Group XXI) for indicating whether the temperature of a fluid in a pipe or tank is too high or low, comprises two bimetal spirals 21 secured at their outer ends to a bar 20 on a flange 18 adapted to be fixed over an orifice in the pipe so that the spirals are immersed in the fluid. The inner ends of the spirals are fixed to a shaft 23 carrying a cam 25 cooperating with a roller 30 normally engaging a low part of the cam. Rotation of the shaft 23 in either direction due to expansion or contraction of the spirals causes the roller to move on to a high part of cam 25, thereby rocking a lever 29 about its pivot 35 to separate contacts 37, 38 and make 37, 39, a snap-action being given by an armature 32 cooperating with a magnet 33. The cam is adjustably secured on a sleeve 90 which is itself secured to shaft 23 by means of a part 45 having a pin 44 engaging the sleeve, the part 45 being secured to the shaft by a screw 95. Shaft 23 can also be rotated manually by means, not shown, for test purposes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3018447A GB647505A (en) | 1948-11-13 | 1948-11-13 | Improvements in or relating to temperature sensitive electric alarm or cut-off means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3018447A GB647505A (en) | 1948-11-13 | 1948-11-13 | Improvements in or relating to temperature sensitive electric alarm or cut-off means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB647505A true GB647505A (en) | 1950-12-13 |
Family
ID=10303602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3018447A Expired GB647505A (en) | 1948-11-13 | 1948-11-13 | Improvements in or relating to temperature sensitive electric alarm or cut-off means |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB647505A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2205427A (en) * | 1987-06-03 | 1988-12-07 | Simon Peter Fisher | Pipe freeze alarm |
-
1948
- 1948-11-13 GB GB3018447A patent/GB647505A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2205427A (en) * | 1987-06-03 | 1988-12-07 | Simon Peter Fisher | Pipe freeze alarm |
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