US3739119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston actuated pressure responsive switch with recenter contact adjustment means
Assignee: General Electric Co
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Filing: 1971-09-01
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Granted: 1973-06-12
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Expires: 1991-09-01
Abstract
Abstract A pressure responsive switch for indicating the loss of pressure in a vehicle brake line with the switch being actuated by piston movement through a swivel or toggle arrangement including a contact ring which is engaged by a contact to complete a circuit when hydraulic pressure occurs. The contact remains in electrical engagement after the toggle returns to its center position. The switch has a stem which is pressed inwardly to recenter the contact after the brake system has been repaired.
Inventors
- 👤 R Rike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:53
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/38; B; B60; B60T; B60T17/00; B60T17/18; B60T17/22; B60T17/226
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
248 words
A pressure responsive switch assembly for indicating a loss of pressure in a pressurized system comprising a switch housing having a top portion of nonconductive material and a base portion of conductive material, a pair of contact rings positioned in said base portion with one of said rings contacting said base portion, an insulating member positioned between said rings to separate said rings and to insulate the other of said rings from said base portion, a contact plate having an aperture therethrough and being in contact with said other of said rings, said contact member being slidable in said housing to bridge said rings and provide electrical contact therebetween, a toggle member of insulating material tiltably mounted in said base portion and having an aperture in the top end thereof, first spring means positioned between said toggle member and said contact member and biasing said contact member against said other of said rings, said toggle member having a lower end adapted to engage a piston assembly in said pressurized system, a rod-like terminal positioned in the top portion of said switch housing and being vertically slidable in said housing, said terminal having a pointed lower end adapted to pass through the aperture in said contact plate and enter the aperture in said toggle member, and second spring means between said terminal and said other of said contact rings to provide an electrical connection therebetween, said second spring means normally biasing said terminal outwardly with respect to said housing.
Claim 2
Dependent Claim
248 words
A pressure responsive switch assembly for indicating a loss of pressure in a pressurized system comprising a switch housing having a top portion of nonconductive material and a base portion of conductive material, a pair of contact rings positioned in said base portion with one of said rings contacting said base portion, an insulating member positioned between said rings to separate said rings and to insulate the other of said rings from said base portion, a contact plate having an aperture therethrough and being in contact with said other of said rings, said contact member being slidable in said housing to bridge said rings and provide electrical contact therebetween, a toggle member of insulating material tiltably mounted in said base portion and having an aperture in the top end thereof, first spring means positioned between said toggle member and said contact member and biasing said contact member against said other of said rings, said toggle member having a lower end adapted to engage a piston assembly in said pressurized system, a rod-like terminal positioned in the top portion of said switch housing and being vertically slidable in said housing, said terminal having a pointed lower end adapted to pass through the aperture in said contact plate and enter the aperture in said toggle member, and second spring means between said terminal and said other of said contact rings to provide an electrical connection therebetween, said second spring means normally biasing said terminal outwardly with respect to said housing.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |