US3628024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photo-optic transducer using apertured shade and moveable shutter
Assignee: Holley Performance Products Inc
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Filing: 1970-04-13
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Granted: 1971-12-14
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Expires: 1990-04-13
Abstract
Abstract A photo-optic transducer employs a stationary shade member with a light-passing aperture formed therein and a moveable shutter member operatively connected to a pressure responsive bellows; a light source or lamp is positioned on one side of the shutter member and a photocell is positioned on the other side of the shade member so as to have the light-passing aperture substantially in line with the light source and photocell; variations in pressure sensed by the bellows causes movement of the shutter so as to in accordance therewith partially block the total area of said aperture in order to varyingly reduce the degree of passage of light from said source to the photocell thereby enabling the photocell to produce an output signal correlated to the pressure than sensed by the bellows.
Inventors
- 👤 Michael F Ciemochowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:13
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0033; G01L9/0039; F; F02; F02D; F02D1/00; F02D9/00; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/0225; F02D2700/0228; F02D2700/023; F02D2700/0241; F02D2700/0269; F02D2700/0282; F02D2700/0284; F02D2700/0294
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
194 words
A photo-optic transducer, comprising a support structure, a shutter member carried by said support structure, a separate shade member carried by said support, one of said members forming a maximum light-passing aperture means, said members being parallel and separated by a common guide, means sensitive and responsive to an input parameter and connected to one of said members for effecting relative movement between said shade and shutter members in response to sensed variations in said input parameter, said support comprising means by which the other of said members is normally stationary but is removably carried by said support so as to be readily interchangeable, a source of light energy disposed on one side of said shade and shutter members, and a photosensitive device disposed on a side of said shade and shutter members opposite to said one side, said shade and shutter members being effective upon experiencing said relative movement to variably restrict in accordance therewith the degree of light energy transmitted from said source through said aperture means to said photosensitive device, and said photosensitive device being effective to create an output signal in accordance with said degree of light energy transmitted thereto.
Claim 2
Dependent Claim
194 words
A photo-optic transducer, comprising a support structure, a shutter member carried by said support structure, a separate shade member carried by said support, one of said members forming a maximum light-passing aperture means, said members being parallel and separated by a common guide, means sensitive and responsive to an input parameter and connected to one of said members for effecting relative movement between said shade and shutter members in response to sensed variations in said input parameter, said support comprising means by which the other of said members is normally stationary but is removably carried by said support so as to be readily interchangeable, a source of light energy disposed on one side of said shade and shutter members, and a photosensitive device disposed on a side of said shade and shutter members opposite to said one side, said shade and shutter members being effective upon experiencing said relative movement to variably restrict in accordance therewith the degree of light energy transmitted from said source through said aperture means to said photosensitive device, and said photosensitive device being effective to create an output signal in accordance with said degree of light energy transmitted thereto.
Claim 3
Dependent Claim
14 words
A photo-optic transducer according to claim 1, wherein said photosensitive device comprises a photocell.
Claim 4
Dependent Claim
47 words
A photo-optic transducer according to claim 1, wherein said means sensitive and responsive to an input parameter comprises a pressure responsive member operatively connected to said shutter member, and wherein said shade member is carried by said support member so as to be stationary with respect thereto.
Claim 5
Dependent Claim
83 words
A photo-optic transducer according to claim 1, wherein said means sensitive and responsive to an input parameter comprises a pressure responsive bellows operatively connected at one end to said shutter member and operatively anchored at another end so as to have said other end stationary with respect to said support structure, said support structure comprising a housing containing said parameter responsive means and said members, said support structure having means providing sufficient access thereto to enable withdrawal and reinsertion of said removable member.
Claim 6
Dependent Claim
48 words
A photo-optic transducer according to claim 1, wherein said shade member is slidably received by said support structure, wherein said shade member is stationary with respect to said support structure, and wherein said shutter member is operatively connected to said means sensitive and responsive to said input parameter.
Claim 7
Dependent Claim
143 words
A photo-optic transducer according to claim 1, wherein said input parameter is internal combustion engine intake manifold vacuum, said means sensitive and responsive to said input parameter comprises a pressure responsive bellows operatively connected at one end to said shutter member and operatively anchored at another end so as to have said other end stationary with respect to said support structure, said bellows being constructed so as to be responsive to the range of vacuum valves encountered in the intake manifold of an internal combustion engine, wherein said shade member is stationary with respect to and slidably received by said support structure, and wherein said light-passing aperture means comprises an aperture formed through said shade member, said aperture being formed such that said output signal is related to engine fuel requirements at the vacuum represented by any given position of said shutter member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |