US3706864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Depth sensing switch with tubular housing having a diaphragm encompassing a portion of said housing
Assignee: Simmonds Precision Products Inc
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Filing: 1971-06-15
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Granted: 1972-12-19
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Expires: 1991-06-15
Abstract
Abstract A depth sensing device has an extensible resilient switch contact, contraposed behind a diaphragm, said contact having the form of a helical spring with both ends fixed and having its axis parallel to the surface of the diaphragm; said contact further flexes inwardly and establishes contact with a fixed contact when liquid pressure deflects the diaphragm. The diaphragm is formed by a flexible sheath that encompasses a portion of the tubular housing that houses the switch contacts, thereby sealing the contacts from the environment.
Inventors
- 👤 Ralph S Gamble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:10
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/34
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
161 words
A fluid-operated switch comprising a tubular plastic casing provided at its upper end with plug means capable of supporting the switch in a receptacle, electrical lead means extending axially through said plug means and terminating in a pair of spaced terminals insulatively mounted within said tubular plastic casing and having their inner ends exposed to the interior of the casing, means defining an opening in said plastic tubular means, a first metallic spring member in said casing associated with one of said spaced terminals and arranged for flexure and a second relatively rigid member associated with another of said spaced terminals with each of said members being in proximity to the means defining said opening, a flexible sheath-like diaphragm encompassing a portion of said tubular plastic casing and sealing the contacts therewithin, said flexible sheath being in close proximity to the first metallic spring member and bowing said spring member against said rigid member when pressure is exerted against said diaphragm.
Claim 2
Dependent Claim
161 words
A fluid-operated switch comprising a tubular plastic casing provided at its upper end with plug means capable of supporting the switch in a receptacle, electrical lead means extending axially through said plug means and terminating in a pair of spaced terminals insulatively mounted within said tubular plastic casing and having their inner ends exposed to the interior of the casing, means defining an opening in said plastic tubular means, a first metallic spring member in said casing associated with one of said spaced terminals and arranged for flexure and a second relatively rigid member associated with another of said spaced terminals with each of said members being in proximity to the means defining said opening, a flexible sheath-like diaphragm encompassing a portion of said tubular plastic casing and sealing the contacts therewithin, said flexible sheath being in close proximity to the first metallic spring member and bowing said spring member against said rigid member when pressure is exerted against said diaphragm.
Claim 3
Dependent Claim
24 words
A fluid-operated switch as claimed in claim 1, wherein the means defining said opening in said tubular plastic casing extends longitudinally of said casing.
Claim 4
Dependent Claim
26 words
A fluid-operated switch as claimed in claim 1, wherein the means defining said opening in said tubular plastic casing is disposed at the terminal end thereof.
Claim 5
Dependent Claim
18 words
A fluid-operated switch as claimed in claim 1, wherein the metallic spring member consists of a coil spring.
Claim 6
Dependent Claim
46 words
A fluid-operated switch as claimed in claim 1, wherein the plastic tubular casing includes a plastic rod element adapted to support the relatively rigid member, said plastic rod further including a concave surface approximating the curvature assumed by the flexible sheath when pressure is applied thereagainst.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |