US3761178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining speed of a moving object
Assignee: Individual
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Filing: 1971-12-29
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Granted: 1973-09-25
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Expires: 1991-12-29
Abstract
Abstract Apparatus is disclosed for determining the speed of a moving object by conducting an image of the object through a lens to a mirror and exciting the mirror with variable frequency oscillations from a light source or a vibrating source, until the image on the mirror becomes substantially steady. The frequency of oscillations exciting the mirror are proportional to the speed of rotation of a wheel driving the moving object. The apparatus may be mounted in a handheld housing.
Inventors
- 👤 C Turner
- 👤 W Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:47
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/36; G01P3/40
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
156 words
Hand-held apparatus for determining the speed of rotation of a rotating object, comprising, in combination: a cylindrical housing; sighting means for permitting viewing through said housing of said object, said sighting means including an eyepiece at one end of said housing and a lens at another end of the housing for conducting an image of said object into said housing; source means for providing a source of variable frequency oscillations; a mirror mounted in said housing positioned to receive the image of said object from said lens and conduct it to said eyepiece; and light means responsive to said variable frequency oscillations to provide light to said mirror at the frequency oF said oscillations, to provide an image of said object at said mirror and at said eyepiece with the rotation thereof substantially stopped, whereby the frequency of said oscillations required to provide said stopped image is proportional to the speed of rotation of said object.
Claim 2
Dependent Claim
156 words
Hand-held apparatus for determining the speed of rotation of a rotating object, comprising, in combination: a cylindrical housing; sighting means for permitting viewing through said housing of said object, said sighting means including an eyepiece at one end of said housing and a lens at another end of the housing for conducting an image of said object into said housing; source means for providing a source of variable frequency oscillations; a mirror mounted in said housing positioned to receive the image of said object from said lens and conduct it to said eyepiece; and light means responsive to said variable frequency oscillations to provide light to said mirror at the frequency oF said oscillations, to provide an image of said object at said mirror and at said eyepiece with the rotation thereof substantially stopped, whereby the frequency of said oscillations required to provide said stopped image is proportional to the speed of rotation of said object.
Claim 3
Dependent Claim
26 words
The apparatus of claim 1 further including adjustable means mounted between said lens and said mirror for focusing the image of said object on said mirror.
Claim 4
Dependent Claim
184 words
Hand-held apparatus for determining the speed of rotation of a rotating object, comprising, in combination: a cylindrical housing; sighting means for permitting viewing through said housing of said object, said sighting means including an eyepiece at one end of said housing and a lens at another end of the housing for conducting an image of said object into said housing; source means for providing a source of variable frequency oscillations; and means responsive to said variable frequency oscillations and to the image of said object in said housing to provide an image of said object at said eyepiece with the rotation thereof substantially stopped, whereby the frequency of said oscillations required to provide said stopped image is proportional to the speed of rotation of said object, said lastmentioned means including a first mirror mounted in said housing on one side thereof for receiving images from said lens nnd deflecting the received images to the opposite side of said housing, and a second mirror mounted in said housing on said opposite side thereof for deflecting the images received from said first mirror to said eyepiece.
Claim 5
Dependent Claim
184 words
Hand-held apparatus for determining the speed of rotation of a rotating object, comprising, in combination: a cylindrical housing; sighting means for permitting viewing through said housing of said object, said sighting means including an eyepiece at one end of said housing and a lens at another end of the housing for conducting an image of said object into said housing; source means for providing a source of variable frequency oscillations; and means responsive to said variable frequency oscillations and to the image of said object in said housing to provide an image of said object at said eyepiece with the rotation thereof substantially stopped, whereby the frequency of said oscillations required to provide said stopped image is proportional to the speed of rotation of said object, said lastmentioned means including a first mirror mounted in said housing on one side thereof for receiving images from said lens nnd deflecting the received images to the opposite side of said housing, and a second mirror mounted in said housing on said opposite side thereof for deflecting the images received from said first mirror to said eyepiece.
Claim 6
Dependent Claim
36 words
The apparatus of claim 3 further including a light source connected to said source means and responsive to said variable frequency oscillation to excite one of said mirrors with light at the frequency of said oscillations.
Claim 7
Dependent Claim
20 words
The apparatus of claim 3 when said lens is inclined in order to conduct said image to said first mirror.
Claim 8
Dependent Claim
28 words
The apparatus of claim 5 further including means for varying the angle of inclination of said first mirror with respect to the angle of inclination of said lens.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |