US3596513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speedometer for boats
Assignee: Individual
•
Filing: 1970-01-27
•
Granted: 1971-08-03
•
Expires: 1990-01-27
Abstract
Abstract A boat speedometer embodies a radiant energy source and a receiver means which is responsive to radiant energy and produces an output. A speed indicator means is coupled to the receiver means. Another means responsive to water pressure caused by movement of the boat in the water produces changes in the response effect of the receiver means in accordance with speed variations of the boat.
Inventors
- 👤 Gary O Sandstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:29
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/02; G01P5/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
85 words
A boat speedometer comprising a radiant energy source, receiver means adapted to respond to said radiant energy and producing an output, speed indicator means connected with the receiver means and responsive to the output thereof to indicate the speed of movement of the boat in water over a range of speeds, and another means responsive to water pressure induced by movement of the boat to vary the response effect of said radiant energy on said receiver means in accordance with speed changes of the boat.
Claim 2
Dependent Claim
85 words
A boat speedometer comprising a radiant energy source, receiver means adapted to respond to said radiant energy and producing an output, speed indicator means connected with the receiver means and responsive to the output thereof to indicate the speed of movement of the boat in water over a range of speeds, and another means responsive to water pressure induced by movement of the boat to vary the response effect of said radiant energy on said receiver means in accordance with speed changes of the boat.
Claim 3
Dependent Claim
39 words
The structure of claim 1 and said water pressure-responsive means interposed between said radiant energy source and said receiver means and intercepting radiant energy and varying the incidence of or quantum of the radiant energy on the receiver means.
Claim 4
Dependent Claim
30 words
The structure of claim 2, wherein said radiant energy source is a light source and said receiver means comprises an electro-optical receiver-amplifier which responds to light to produce an output.
Claim 5
Dependent Claim
30 words
The structure of claim 3, and said water pressure responsive means including a movable reflector of light capable of changing the point of incidence of the light on said receiver-amplifier.
Claim 6
Dependent Claim
19 words
The structure of claim 4, and said receiver-amplifier including a receiver component in the form of a photoelectric cell.
Claim 7
Dependent Claim
68 words
The structure of claim 3, and said water pressure responsive means including a movable reflector element, said receiver-amplifier including a receiver element in the form of a photosensitive cell positioned to receive light from the reflector element, and an electrical amplifier circuit interconnecting the photosensitive cell and said speed indicator means so that the electrical output of the call may be amplified and transmitted to the indicator means.
Claim 8
Dependent Claim
57 words
The structure of claim 6, and said indicator means comprising a milliammeter having an indicator scale thereon calibrated in speed increments, said amplifier circuit including a transistor whose base is connected serially with the photosensitive cell and whose conductance increases as the resistance of the cell decreases in response to increasing exposure to light from said source.
Claim 9
Dependent Claim
14 words
The structure of claim 7, and said light source comprises a light emitting diode.
Claim 10
Dependent Claim
51 words
The structure of claim 2, and said water pressure-responsive means comprising an elastic diaphragm disposed generally transverse to the normal direction of the boat in the water, and a radiant energy intercepting and reflecting element adjacent the diaphragm and being moved by flexure of the diaphragm in response to water pressure.
Claim 11
Dependent Claim
64 words
The structure of claim 9, and said radiant energy source being a light source, said reflecting element comprising a bendable reed disposed immediately inwardly of said elastic diaphragm and having a light reflecting face disposed obliquely to the axes of the light source and said receiver means, the receiver means including a light sensitive energy producing component receiving light from said light reflecting face.
Claim 12
Dependent Claim
40 words
The structure of claim 10, and said bendable reed being a metallic reed anchored at one end only and being bendable about such anchored end and extending across said diaphragm for a substantial portion of the width of the latter.
Claim 13
Dependent Claim
25 words
The structure of claim 11, and said light reflecting face comprising a thin light reflecting plastic layer bonded to the interior face of said reed.
Claim 14
Dependent Claim
68 words
The structure of claim 2, and supporting means in the form of a sealed container for the radiant energy source and at least a part of the receiver means, said supporting means also carrying said water pressure responsive means, and additional means to secure the supporting means to the bottom of a boat so that the pressure responsive means will project into the water below the boat bottom.
Claim 15
Dependent Claim
60 words
The structure of claim 13, and said additional means comprising an exterior sleeve member surrounding the supporting means and being anchored to the boat bottom, and releasable sealed connector means between said supporting means and sleeve member allowing the supporting means to be separated from the boat as a unit without the necessity of removing the boat from the water.
References Cited (Backward Citations)
US2178422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |