GB1389477A - Snap-action switch responsive to variations in a physical parameter - Google Patents
Snap-action switch responsive to variations in a physical parameterInfo
- Publication number
- GB1389477A GB1389477A GB2989172A GB2989172A GB1389477A GB 1389477 A GB1389477 A GB 1389477A GB 2989172 A GB2989172 A GB 2989172A GB 2989172 A GB2989172 A GB 2989172A GB 1389477 A GB1389477 A GB 1389477A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lever
- spring
- snap
- dead
- adjustable
- 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
- 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
- H01H35/2657—Details with different switches operated at substantially different pressures
- H01H35/2664—Details with different switches operated at substantially different pressures making use of a balance plate pivoting about different axes
-
- 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
- H01H35/2614—Means for adjustment of "ON" or "OFF" operating pressure by varying the bias on the pressure sensitive element
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Thermally Actuated Switches (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
Abstract
1389477 Snap-action switches; fluid pressure actuation DANFOSS AS 26 June 1972 [26 June 1971] 29891/72 Heading H1N A pressure or like variable condition responsive snap-action switch comprises a main actuating lever 13 Fig. 3 movable, about pivot 14, between end stops 40, 41 over a dead-centre position of a snap -action arrangement comprising a rigid tilting plate 17 engaged at opposite ends by knife edges 16, 18 respectively arranged on the lever 13 and on a double-ended lever 19 yieldingly urged to load the system by means of a tension spring 24. The lever 19 comprises two separate members 21, 22 pivoted on a fixed pin 20 and coupled at an adjustable abutment 23. The lever 13 is moved by a fluid-pressure bellows 26 acting against an adjustable "rangesetting" compression spring 29. The "differential setting" is adjusted by varying the tension in spring 24 which operates to urge the system to one side or other of the extreme off-centre position. The stops 40, 41 are adjustable in position by screw 39 whereby either the upper or lower extreme positions of lever 13 may be arranged to be near the dead-centre position. The spring adjustment screws 33, 37 are both arranged to pass through apertures in the lever 13. A contact actuator arm (50) Fig. 4 (not shown) projects from the lever 13 between leaf spring supported contacts (45), (46) to move one or other away from opposite sides of a central fixed contact (44). Projections (51) (52) Fig. 2 (not shown) on the spring end plates 35, 38 are visible through apertures (11) (12) in the casing and 32 in an actuator strap 30 to indicate the spring settings. The top of the end-stop adjustment screw 39 is also visible externally to indicate which of the upper or lower positions is nearest to dead-centre.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2131858A DE2131858C3 (en) | 1971-06-26 | 1971-06-26 | Pressure dependent electrical switch |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1389477A true GB1389477A (en) | 1975-04-03 |
Family
ID=5811900
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2989172A Expired GB1389477A (en) | 1971-06-26 | 1972-06-26 | Snap-action switch responsive to variations in a physical parameter |
Country Status (11)
Country | Link |
---|---|
US (1) | US3758732A (en) |
JP (1) | JPS5126622B1 (en) |
AR (1) | AR198789A1 (en) |
AU (1) | AU468975B2 (en) |
BR (1) | BR7204180D0 (en) |
DD (1) | DD98176A5 (en) |
DE (1) | DE2131858C3 (en) |
DK (1) | DK137207C (en) |
FR (1) | FR2143744B1 (en) |
GB (1) | GB1389477A (en) |
IT (1) | IT959075B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0665079U (en) * | 1991-10-31 | 1994-09-13 | 光代 小津 | Small car desk |
US5314336A (en) * | 1992-02-07 | 1994-05-24 | Mark Diamond | Toy and method providing audio output representative of message optically sensed by the toy |
US5998237A (en) * | 1996-09-17 | 1999-12-07 | Enthone-Omi, Inc. | Method for adding layers to a PWB which yields high levels of copper to dielectric adhesion |
US6141870A (en) | 1997-08-04 | 2000-11-07 | Peter K. Trzyna | Method for making electrical device |
-
1971
- 1971-06-26 DE DE2131858A patent/DE2131858C3/en not_active Expired
-
1972
- 1972-06-05 AU AU43065/72A patent/AU468975B2/en not_active Expired
- 1972-06-07 IT IT68810/72A patent/IT959075B/en active
- 1972-06-09 AR AR242469A patent/AR198789A1/en active
- 1972-06-21 DK DK307772A patent/DK137207C/en not_active IP Right Cessation
- 1972-06-23 DD DD163937A patent/DD98176A5/xx unknown
- 1972-06-23 FR FR7222775A patent/FR2143744B1/fr not_active Expired
- 1972-06-26 BR BR4180/72A patent/BR7204180D0/en unknown
- 1972-06-26 US US00266066A patent/US3758732A/en not_active Expired - Lifetime
- 1972-06-26 JP JP47063963A patent/JPS5126622B1/ja active Pending
- 1972-06-26 GB GB2989172A patent/GB1389477A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
AR198789A1 (en) | 1974-07-24 |
BR7204180D0 (en) | 1973-08-09 |
AU4306572A (en) | 1973-12-13 |
DE2131858B2 (en) | 1973-08-09 |
DE2131858A1 (en) | 1972-12-28 |
DK137207B (en) | 1978-01-30 |
FR2143744A1 (en) | 1973-02-09 |
AU468975B2 (en) | 1973-12-13 |
JPS5126622B1 (en) | 1976-08-07 |
DE2131858C3 (en) | 1974-03-07 |
DD98176A5 (en) | 1973-06-05 |
IT959075B (en) | 1973-11-10 |
FR2143744B1 (en) | 1975-03-07 |
DK137207C (en) | 1978-07-03 |
US3758732A (en) | 1973-09-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |