GB692893A - Improvements in electrical switch control mechanisms - Google Patents
Improvements in electrical switch control mechanismsInfo
- Publication number
- GB692893A GB692893A GB5663/51A GB566351A GB692893A GB 692893 A GB692893 A GB 692893A GB 5663/51 A GB5663/51 A GB 5663/51A GB 566351 A GB566351 A GB 566351A GB 692893 A GB692893 A GB 692893A
- Authority
- GB
- United Kingdom
- Prior art keywords
- adjustable
- bellows
- shaft
- pinion
- lug
- 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
- H01H37/36—Thermally-sensitive members actuated due to expansion or contraction of a fluid with or without vaporisation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/26—Details
- H01H35/2607—Means for adjustment of "ON" or "OFF" operating pressure
- H01H35/2635—Means for adjustment of "ON" or "OFF" operating pressure by adjustment of a motion transmitting system
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/12—Means for adjustment of "on" or "off" operating temperature
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Thermal Sciences (AREA)
- Thermally Actuated Switches (AREA)
- Actuator (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
692,893. Thermal switches. GENERAL MOTORS CORPORATION. March 8, 1951 [April 6, 1950], No. 5663/51. Addition to 580,287. Class 38 (v) The invention of the parent Specification is modified by providing a screw by which the initial position of the bellows is made adjustable. In one form, Fig. 1, the switch is similar to that of the parent, the bellows 38 being secured to a member 40 which is received within a split nut 44 which is adjustable in a flange 46 in the base of the frame 20. Opening movement of the bellows is limited by the engagement of a lug (not shown) on the follower 34 with a flange on an adjustable screw 82. Excessive increase of temperature causes a lug 84 to raise a plunger 86 to close contacts 92, 125 to short out a signal lamp 129. The tension of spring bar 56 and the centre line of the toggle 52, 54 are adjustable, the former by screwing a sleeve 60 into or out of the side of the frame 20, and the latter by a cam 72 secured to a shaft 62 and co-operating with a lug 74 on the bar 56. The adjustments may be independent of each other or, if the sleeve 60 and shaft 62 are secured together, simultaneous. In a modification, Fig. 5, the cam 72 is replaced by a pinion 272 co-operating with a pinion 271 having an eccentric bore in which is located a pin 253, the head of which serves as a pivot for toggle link 54. The shaft 62, carrying the pinion 272, and the sleeve 60, are separately adjustable. The contacts 92, 125 may be omitted and the screw 82 may have two flanges limiting opening and closing movement of the bellows, as shown. In a further modification, Fig. 9 (not shown), the cam 72 (or its equivalent) is omitted and the shaft 62 serves only to support the knob 64.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US154246A US2693512A (en) | 1950-04-06 | 1950-04-06 | Electrical apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB692893A true GB692893A (en) | 1953-06-17 |
Family
ID=22550595
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB11347/44A Expired GB580287A (en) | 1950-04-06 | 1944-06-14 | Improvements in electric switch control mechanisms |
GB5663/51A Expired GB692893A (en) | 1950-04-06 | 1951-03-08 | Improvements in electrical switch control mechanisms |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB11347/44A Expired GB580287A (en) | 1950-04-06 | 1944-06-14 | Improvements in electric switch control mechanisms |
Country Status (4)
Country | Link |
---|---|
US (1) | US2693512A (en) |
DE (2) | DE889781C (en) |
FR (2) | FR950479A (en) |
GB (2) | GB580287A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE964240C (en) * | 1951-10-10 | 1957-05-23 | Gen Motors Corp | Electric control switchgear for refrigerators |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1231527A (en) * | 1914-09-14 | 1917-06-26 | Long Landreth Schneider Co | Thermostatic snap control. |
DE572733C (en) * | 1928-06-27 | 1933-03-22 | Henry Raphael Guinot | Device for setting the switching point of automatic circuit breakers controlled by liquids or gases |
US2010649A (en) * | 1932-11-04 | 1935-08-06 | Gen Piate Company | Control |
US2037155A (en) * | 1933-08-07 | 1936-04-14 | William W Stuart | Control structure |
US2092085A (en) * | 1935-02-19 | 1937-09-07 | Henry F Riley | Temperature control device |
US2351038A (en) * | 1941-02-05 | 1944-06-13 | Gen Motors Corp | Refrigerating apparatus |
US2459522A (en) * | 1944-10-30 | 1949-01-18 | Gen Motors Corp | Switch for refrigerating apparatus |
-
1944
- 1944-06-14 GB GB11347/44A patent/GB580287A/en not_active Expired
-
1947
- 1947-07-29 FR FR950479D patent/FR950479A/en not_active Expired
-
1950
- 1950-04-06 US US154246A patent/US2693512A/en not_active Expired - Lifetime
- 1950-05-16 DE DEG1918A patent/DE889781C/en not_active Expired
-
1951
- 1951-03-08 GB GB5663/51A patent/GB692893A/en not_active Expired
- 1951-04-05 FR FR62264D patent/FR62264E/en not_active Expired
- 1951-04-07 DE DEG5610A patent/DE909731C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB580287A (en) | 1946-09-03 |
US2693512A (en) | 1954-11-02 |
DE889781C (en) | 1953-09-14 |
FR950479A (en) | 1949-09-28 |
DE909731C (en) | 1954-04-22 |
FR62264E (en) | 1955-06-13 |
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