US3448280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for positioning workpiece to aline a cavity therein with a light beam
Assignee: AT&T Inc
•
Filing: 1966-11-02
•
Granted: 1969-06-03
•
Expires: 1986-11-02
Abstract
No abstract record available.
Inventors
- 👤 Frank H Blitchington Jr
- 👤 Richard A Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:36
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; H; H05; H05K; H05K3/00; H05K3/0008; H05K1/00; H05K1/02; H05K1/0266; H05K1/0269; H05K2201/00; H05K2201/09; H05K2201/09818; H05K2201/09918; H05K3/0011; H05K3/0044; H05K3/0047; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49762
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
AN APPARATUS FOR POSITIONING A CAVITY IN A WORKPIECE AT A PRESELECTED LOCATION COMPRISING: MEANS FOR PROJECTING A BEAM OF LIGHT HAVING A CROSS SECTIONAL SHAPE SUBSTANTIALLY CORRESPONDIDNG TO BUT SLIGHTLY SMALLER THAN THE SHAPE OF SAID CAVITY AGAINST SAID WORKPIECE; PHOTOLECTRIC MEANS FOR DETECTING LIGHT REFLECTED FROM SAID WORKPIECE AT AN ANGLE LESS THAN A PREDETERMINED ANGLE AND FOR PRODUCING ELECTRICAL SIGNALS VARYING WITH THE AMOUNT OF LIGHT DETECTED; AND MEANS RESPONSIVE TO SAID ELECTRICAL SIGNALS FOR MOVING SAID WORKPIECE PERPENDICULARLY WITH RESPECT TO SAID BEAM OF LIGHT TO CENTER SAID LIGHT BEAM WITHIN SAID CAVITY WHEREUPON NO LIGHT IS REFLECTED AT LESS THAN THE PREDETERMINED ANGLE INDICATING THAT THE CAVITY IS POSITIONED AT THE PRESELECTED LOCATION.
Claim 2
Independent Claim
118 words
AN APPARATUS FOR POSITIONING A CAVITY IN A WORKPIECE AT A PRESELECTED LOCATION COMPRISING: MEANS FOR PROJECTING A BEAM OF LIGHT HAVING A CROSS SECTIONAL SHAPE SUBSTANTIALLY CORRESPONDIDNG TO BUT SLIGHTLY SMALLER THAN THE SHAPE OF SAID CAVITY AGAINST SAID WORKPIECE; PHOTOLECTRIC MEANS FOR DETECTING LIGHT REFLECTED FROM SAID WORKPIECE AT AN ANGLE LESS THAN A PREDETERMINED ANGLE AND FOR PRODUCING ELECTRICAL SIGNALS VARYING WITH THE AMOUNT OF LIGHT DETECTED; AND MEANS RESPONSIVE TO SAID ELECTRICAL SIGNALS FOR MOVING SAID WORKPIECE PERPENDICULARLY WITH RESPECT TO SAID BEAM OF LIGHT TO CENTER SAID LIGHT BEAM WITHIN SAID CAVITY WHEREUPON NO LIGHT IS REFLECTED AT LESS THAN THE PREDETERMINED ANGLE INDICATING THAT THE CAVITY IS POSITIONED AT THE PRESELECTED LOCATION.
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) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |