GB510658A - Improvements in or relating to thermally controlled delayed action electric switches - Google Patents
Improvements in or relating to thermally controlled delayed action electric switchesInfo
- Publication number
- GB510658A GB510658A GB35489/38A GB3548938A GB510658A GB 510658 A GB510658 A GB 510658A GB 35489/38 A GB35489/38 A GB 35489/38A GB 3548938 A GB3548938 A GB 3548938A GB 510658 A GB510658 A GB 510658A
- Authority
- GB
- United Kingdom
- Prior art keywords
- catch
- lug
- thermal element
- edge
- spring
- 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
- 230000003111 delayed effect Effects 0.000 title abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 3
- 238000001816 cooling Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
- H01H43/30—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action
- H01H43/301—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material
- H01H43/302—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material of solid bodies
Landscapes
- Thermally Actuated Switches (AREA)
- Electric Stoves And Ranges (AREA)
- Control Of Resistance Heating (AREA)
Abstract
510,658. Electrically released switches. MANNHEIMER, G. Dec. 6, 1938, No. 35489. Convention date, Jan. 15. [Class 38 (v)] A switch with delayed action, such as may be used in staircase lighting, is held closed against a spring by a thermally controlled catch which releases a movable part step-by-step to open the switch, the catch meanwhile first rotating in one direction about an axis in one direction, and then about a second axis in the other direction. A button 3 is pressed down and held against a spring by a catch 11 which is pivoted at one end of a thermal element 13 and is pulled by a spring 15 across two lugs 5 and 6. In this position a heating coil 24 of the thermal element 13 is closed by the engagement of contacts 17, 18 of which 17 is electrically connected with a contact 20 which bridges contacts 21, 22 and closes the circuit to a load 25. The thermal element 13 then bends about a fixed support 14 into the position shown in Fig. 5 causing the catch 11 to pivot about an edge 9 on the lug 6 until it is free from the top edge 7 of the lug 5. The button 3 then springs up until an edge 10 made by cutting a step in the lug 6 engages the catch 11, and the heating circuit 24 is broken although the main circuit still remains closed. The thermal element now cools and causes the catch 11 to rotate about an edge 8 on the lug 5 until the lug 6 is released and the push button moves up to open the main circuit. The heating up time is short compared with the cooling time which can be adjusted by rotating the support 14.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE510658X | 1938-01-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB510658A true GB510658A (en) | 1939-08-04 |
Family
ID=20310963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB35489/38A Expired GB510658A (en) | 1938-01-15 | 1938-12-06 | Improvements in or relating to thermally controlled delayed action electric switches |
Country Status (4)
Country | Link |
---|---|
US (1) | US2253815A (en) |
DE (1) | DE711716C (en) |
FR (1) | FR846940A (en) |
GB (1) | GB510658A (en) |
-
1938
- 1938-10-11 DE DEA88272D patent/DE711716C/en not_active Expired
- 1938-10-20 US US235992A patent/US2253815A/en not_active Expired - Lifetime
- 1938-12-02 FR FR846940D patent/FR846940A/en not_active Expired
- 1938-12-06 GB GB35489/38A patent/GB510658A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR846940A (en) | 1939-09-28 |
US2253815A (en) | 1941-08-26 |
DE711716C (en) | 1941-10-06 |
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