Patent US965348A successfully refreshed from Google Patents.
Patent US3731386A successfully refreshed from Google Patents.
US3731386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring device for determining the angular position of a cam
Assignee: Individual
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Filing: 1970-10-23
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Granted: 1973-05-08
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Expires: 1990-10-23
Abstract
Abstract The invention relates to a measuring device for determining the angular position or orientation of a cam, with an electrical length measuring follower, the pin of which bears radially on the rotary cam and produces a measurement voltage representative of the radial measurement of the cam at any given moment.
Inventors
- 👤 K Kreiensen
- 👤 K Hutter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:16
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
124 words
A device for measuring the angular position of a cam comprising, in combination; means for rotatably mounting said cam, first and second electrical cam followers, said first follower arranged to bear radially at a first point on said cam, said second follower arranged to bear radially at a second point on said cam and angularly displaced from said first point, said first and second followers adapted to generate first and second electric signals representative of the radii of said cam at said first and second points, and means for combining said first and second signals to generate a third signal representative of the difference between said first and second signals sucH that said third signal is indicative of the angular position of said cam.
Claim 2
Independent Claim
124 words
A device for measuring the angular position of a cam comprising, in combination; means for rotatably mounting said cam, first and second electrical cam followers, said first follower arranged to bear radially at a first point on said cam, said second follower arranged to bear radially at a second point on said cam and angularly displaced from said first point, said first and second followers adapted to generate first and second electric signals representative of the radii of said cam at said first and second points, and means for combining said first and second signals to generate a third signal representative of the difference between said first and second signals sucH that said third signal is indicative of the angular position of said cam.
Claim 3
Dependent Claim
24 words
The device as set forth in claim 1 including display means for displaying said third signal indicative of the angular position of said cam.
Claim 4
Dependent Claim
31 words
The device as set forth in claim 1 wherein said display means comprises a voltmeter, said first and second signals being combined subtractively to generate said third signal across said voltmeter.
Claim 5
Dependent Claim
66 words
The device as set forth in claim 1 including a plurality of first electrical followers for generating a plurality of first electrical signals, said first signals being connected series additively, and a plurality of second electrical followers for generating a plurality of second electrical signals said second signals being connected series additively, said first and second series additively connected signals being connected to a differential circuit.
Claim 6
Dependent Claim
22 words
The combination as set forth in claim 4 including means for balancing each one of said signals from each of said followers.
Claim 7
Dependent Claim
43 words
The combination as set forth in claim 5 wherein said balancing means comprise a plurality of voltage dividers connected in parallel across the output of each of said followers and a plurality output taps for each of said dividers variable along said dividers.
Claim 8
Dependent Claim
24 words
The combination as set forth in claim 4 wherein said first followers and said second followers are displaced in angular symmetry about said cam.
Claim 9
Dependent Claim
38 words
The device as set forth in claim 1 including an electric motor connected to rotate said cam and means responsive to said third signal for operating said motor in a direction to reduce said third signal to zero.
Claim 10
Dependent Claim
76 words
The combination as set forth in claim 8 wherein said motor operating means comprises a switch responsive to said third signal for energizing said motor for rotation in one direction when said third signal is positive, in the other direction when said third signal is negative and for de-energizing said motor wherein said signal is zero, such that said motor is operated until said cam assumes a predetermined position wherein said third differential signal is zero.
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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |