US3812351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary position detector machine control system
Assignee: Hurletron Inc
•
Filing: 1972-05-25
•
Granted: 1974-05-21
•
Expires: 1992-05-25
Abstract
Abstract In the illustrated embodiment a rotary position detector utilizes an angularly adjustable light conduit for selecting the angle of the input shaft at which a reference signal is generated. In a web register control system where an analog error signal is to be generated according to any lack of coincidence between the reference signal and a scanner signal, such analog error signal can be utilized during set up (with the web properly registered) for automatic positioning of the light conduit at the angle required to define the register condition of the system.
Inventors
- 👤 D Coberley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:39
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/36; B; B65; B65H; B65H23/00; B65H23/04; B65H23/18; B65H23/188; B65H23/1882
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
341 words
A rotary position detector having a mechanical input for coupling to a driving shaft and having an electrical output for supplying a cyclical reference signal at a desired angle of said mechanical input, said detector comprising a stationary frame with a light source and a light responsive element thereon, a rotatable position detector assembly mounted for rotation relative to said frame on an axis of rotation and connected with said mechanical input for rotation about said axis in synchronism with the rotation of said mechanical input, said assembly including a segment movable in a circular path about said axis during rotation of said assembly and having a limited extent in the direction along said circular path, said segment presenting a differential light transmission property so as to define by its position about said axis a distinctive angular position of said assembly, rotatable light fiber transmission means mounted for selective angular adjustment relative to said Frame and operable in each successive angular position thereof to provide a light transmission path from the light source to a respective point along the circular path of said segment and to provide a return light path from such point on the circular path to said light responsive element, the light transmission means in conjunction with said light source and said light responsive element being operable to generate said cyclical reference signal in response to registration of said segment with said light transmission means in each revolution of said position detector assembly, without mechanical or electrical contact between the segment and the light transmission means, and position detector adjustment means connected with said rotatable light transmission means and operable to selectively rotate said rotatable light transmission means to adjust the point of intersection thereof with said circular path, thereby to adjust the angle of the mechanical input at which said cyclical signal occurs without requiring any change in the position of said segment on said position detector assembly, said adjustment means being operable to rotate the light transmission means to an unlimited extent in a given direction.
Claim 2
Dependent Claim
341 words
A rotary position detector having a mechanical input for coupling to a driving shaft and having an electrical output for supplying a cyclical reference signal at a desired angle of said mechanical input, said detector comprising a stationary frame with a light source and a light responsive element thereon, a rotatable position detector assembly mounted for rotation relative to said frame on an axis of rotation and connected with said mechanical input for rotation about said axis in synchronism with the rotation of said mechanical input, said assembly including a segment movable in a circular path about said axis during rotation of said assembly and having a limited extent in the direction along said circular path, said segment presenting a differential light transmission property so as to define by its position about said axis a distinctive angular position of said assembly, rotatable light fiber transmission means mounted for selective angular adjustment relative to said Frame and operable in each successive angular position thereof to provide a light transmission path from the light source to a respective point along the circular path of said segment and to provide a return light path from such point on the circular path to said light responsive element, the light transmission means in conjunction with said light source and said light responsive element being operable to generate said cyclical reference signal in response to registration of said segment with said light transmission means in each revolution of said position detector assembly, without mechanical or electrical contact between the segment and the light transmission means, and position detector adjustment means connected with said rotatable light transmission means and operable to selectively rotate said rotatable light transmission means to adjust the point of intersection thereof with said circular path, thereby to adjust the angle of the mechanical input at which said cyclical signal occurs without requiring any change in the position of said segment on said position detector assembly, said adjustment means being operable to rotate the light transmission means to an unlimited extent in a given direction.
Claim 3
Dependent Claim
97 words
A rotary position detector in accordance with claim 1 with said light transmission means including fixed light path sections extending from the light source and the light responsive element to the axis of rotation of said position detector assembly and including movable light path section means extending from the axis of said position detector assembly to a point in registry with said circular path, said movable light path section means being angularly adjustable about the axis of rotation of said position detector assembly while maintaining light transmitting alignment with said fixed light transmission section at said axis.
Claim 4
Dependent Claim
249 words
A rotary position detector in accordance with claim 1 with said rotatable light transmission means comprising a fixed light path section providing a common light path portion directed axially along the axis of rotation of said position detector assembly and providing respective branch light path portions leading from said common path portion respectively to said light source and said light responsive element, and said light transmission means further comprising a common angularly movable light path section having a first portion directed axially and in alignment with said common portion of said fixed light path section, having a second axially directed portion aligned with said circular path and having a radially extending connecting light path portion connecting the first and second axially directed portions, said position detector adjustment means being operable to selectively adjust the angle of said movable light path section to register said second axially directed portion thereof with any point along said circular path of said segment while maintaining the light transmission alignment of said first axial portion with said common portion of the fixed light transmission section, the fixed light path section being operable in any position of adjustment of the movable light path section to conduct light from the light source to said movable light path section and to conduct light reflected from the position detector assembly and along said movable light path section through said common portion of the fixed light path section and through the second branch thereof to said light responsive element.
Claim 5
Dependent Claim
113 words
A rotary position detector in accordance with claim 1 with said adjustment means comprising a motor having a drive coupling with said rotatable light transmission means for effecting angular adjustment thereof, a local energizing circuit for said motor for operating said motor at a relatively higher speed, and a remotely controlled motor energizing circuit for operating said motor at a relatively lower speed in effecting angular adjustment of said light transmission means, whereby the position detector assembly may be adjusted at a remote station under operating conditions so as to establish a desired operating relationship between the angular position of said mechanical input and the time of occurrence of said cyclical reference signals.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |