US3120779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide projector with precise focusing
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1961-04-14
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Granted: 1964-02-11
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Expires: 1981-04-14
Abstract
No abstract record available.
Inventors
- 👤 Mulch Hans
- 👤 Riecke Manfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:17
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/40; G03; G03B; G03B21/00; G03B21/14; G03B21/53
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
216 words
IN A SELF-FOCUSING SLIDE PROJECTOR HAVING A SUPPORT, FURTHER HAVING OBJECTIVE MEANS AND A SLIDE CARRIER COAXIALLY DISPOSED AND ONE THEREOF BEING MOUNTED ON SAID SUPPORT, THERE BEING MEANS ON SAID SUPPORT OPERATIVELY CONNECTED TO THE SLIDE CARRIER FOR ADJUSTING THE DISTANCE BETWEEN A SLIDE ON SAID SLIDE CARRIER AND SAID OBJECTIVE MEANS IN THE DIRECTION OF THE AXIS OF THE OBJECTIVE MEANS AND AT A DISTANCE RESPONSIVE TO THE THICKNESS OF SAID SLIDE, THE IMPROVEMENT COMPRISING: A CARRIAGE MOUNTED ON SAID SUPPORT FOR MOVEMENT IN THE DIRECTION OF SAID OPTICAL AXIS, SAID CARRIAGE SUPPORTING THE OTHER ONE OF SAID OBJECTIVE MEANS AND SAID SLIDE CARRIER, A ROTATABLE MEMBER HAVING AN ECCENTRIC PIN ON ONE END THEREOF EXTENDING INTO SAID GROOVE SO THAT ROTATION OF SAID ROTATABLE MEMBER RECIPROCATES SAID CARRIAGE TOGETHER WITH SAID SLIDE CARRIER AND SAID SLIDE CARRIER MOVING MEANS IN SAID DIRECTION TO FURTHER ADJUST THE DISTANCE BETWEEN SAID SLIDE CARRIER AND OBJECTIVE MEANS, AN ELECTRIC MOTOR, A CLUTCH MEMBER INTERPOSED BETWEEN SAID MOTOR AND SAID ROTATABLE MEMBER, ELECTROMAGNETIC MEANS OPERATIVELY CONNECTED TO SAID CLUTCH MEMBER FOR ACTUATING THE SAME TO ENGAGE AND DISENGAGE SAID MOTOR AND SAID ROTATABLE MEMBER, MEANS ON SAID ROTATABLE MEMBER FOR INDEXING SAID CARRIAGE WITH RESPECT TO SAID OBJECTIVE MEANS SO THAT A PICTURE OF A SLIDE POSITIONED
Claim 2
Dependent Claim
216 words
IN A SELF-FOCUSING SLIDE PROJECTOR HAVING A SUPPORT, FURTHER HAVING OBJECTIVE MEANS AND A SLIDE CARRIER COAXIALLY DISPOSED AND ONE THEREOF BEING MOUNTED ON SAID SUPPORT, THERE BEING MEANS ON SAID SUPPORT OPERATIVELY CONNECTED TO THE SLIDE CARRIER FOR ADJUSTING THE DISTANCE BETWEEN A SLIDE ON SAID SLIDE CARRIER AND SAID OBJECTIVE MEANS IN THE DIRECTION OF THE AXIS OF THE OBJECTIVE MEANS AND AT A DISTANCE RESPONSIVE TO THE THICKNESS OF SAID SLIDE, THE IMPROVEMENT COMPRISING: A CARRIAGE MOUNTED ON SAID SUPPORT FOR MOVEMENT IN THE DIRECTION OF SAID OPTICAL AXIS, SAID CARRIAGE SUPPORTING THE OTHER ONE OF SAID OBJECTIVE MEANS AND SAID SLIDE CARRIER, A ROTATABLE MEMBER HAVING AN ECCENTRIC PIN ON ONE END THEREOF EXTENDING INTO SAID GROOVE SO THAT ROTATION OF SAID ROTATABLE MEMBER RECIPROCATES SAID CARRIAGE TOGETHER WITH SAID SLIDE CARRIER AND SAID SLIDE CARRIER MOVING MEANS IN SAID DIRECTION TO FURTHER ADJUST THE DISTANCE BETWEEN SAID SLIDE CARRIER AND OBJECTIVE MEANS, AN ELECTRIC MOTOR, A CLUTCH MEMBER INTERPOSED BETWEEN SAID MOTOR AND SAID ROTATABLE MEMBER, ELECTROMAGNETIC MEANS OPERATIVELY CONNECTED TO SAID CLUTCH MEMBER FOR ACTUATING THE SAME TO ENGAGE AND DISENGAGE SAID MOTOR AND SAID ROTATABLE MEMBER, MEANS ON SAID ROTATABLE MEMBER FOR INDEXING SAID CARRIAGE WITH RESPECT TO SAID OBJECTIVE MEANS SO THAT A PICTURE OF A SLIDE POSITIONED
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) | 1967-02-10 | 1967-08-12 | 1968-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-10 | 1971-08-12 | 1972-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-10 | 1975-08-12 | 1976-02-11 | $7700.00 | Window Closed / Lapsed |