US3792260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photo-electric protection system for plotter
Assignee: Cal Comp Inc
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Filing: 1973-03-14
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Granted: 1974-02-12
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Expires: 1993-03-14
Abstract
Abstract Mirrors mounted on the moving component of a machine direct the light beam of a photo-electric system for purposes of safety or control. The photo-electric components can then be mounted to stationary components of the machine.
Inventors
- 👤 E Stewart
- 👤 J Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:51
CPC Classifications
F; F16; F16P; F16P3/00; F16P3/12; F16P3/14; F16P3/144
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A protection apparatus in combination with a plotter of the type having a moving girder which carries the plotting head comprising: a stationary light source positioned to transmit a light beam in a direction which is perpendicular to said girder; a first mirror mounted adjacent and stationary with respect to one end of said girder, said first mirror to be positioned to reflect the light beam parallel to said girder; a second mirror mounted adjacent and stationary with respect to the other end of said girder, said second mirror to be positioned to reflect the light beam reflected from said first mirror in a direction perpendicular to said girder; photosensitive means for detecting the presence of the beam reflected from said second mirror.
Claim 2
Dependent Claim
123 words
A protection apparatus in combination with a plotter of the type having a moving girder which carries the plotting head comprising: a stationary light source positioned to transmit a light beam in a direction which is perpendicular to said girder; a first mirror mounted adjacent and stationary with respect to one end of said girder, said first mirror to be positioned to reflect the light beam parallel to said girder; a second mirror mounted adjacent and stationary with respect to the other end of said girder, said second mirror to be positioned to reflect the light beam reflected from said first mirror in a direction perpendicular to said girder; photosensitive means for detecting the presence of the beam reflected from said second mirror.
References Cited (Backward Citations)
GB417808A
Cited
US2320346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |