US3700884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for adjusting position of light source for projectors and the like
Assignee: Ricoh Co Ltd
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Filing: 1970-11-10
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Granted: 1972-10-24
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Expires: 1990-11-10
Abstract
Abstract A device is provided for precisely positioning a light source in the optical system of a projector or the like, especially relative to a condenser system and a reflecting mirror. It consists of two position adjustment members, one being adjustable along two coordinate axes and the other being adjustable along the third coordinate axis. It is extremely compact in size, especially in thickness and is well adapted for miniaturization of a projector or the like. It is also very simple in operation to attain a highly uniform field with high luminance.
Inventors
- 👤 Sakae Fujimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:09
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/20; G03B21/2046
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
243 words
A device for adjusting the position of a light source adapted for mounting on the frame of a projector comprising: a. a flat base member detachably secured to said frame and having: i. a first flat lever member pivoted at one end to said base member and having a first upstanding pin extending away from said base member on its opposite end; and ii. a threaded rod fixed to said base member diametrically opposite said first lever member and extending in the same direction as said first upstanding pin; b. a first flat adjustment member having a first aperture therein fOr receiving said threaded rod and means thereon cooperating with said threaded rod and said first upstanding pin by which said first adjustment member is mounted to said base member for adjustment of the spacing between said base member and said first adjustment member and for adjustment in one angular direction in a plane parallel to that of said base member; and c. a second flat adjustment member carrying the light source and pivotably mounted on said first flat adjustment member for adjusting the position of the light source in another angular direction in a plane parallel to that of said base member by means including: i. a pivot on said first adjustment member; and ii. a second flat lever member pivotally mounted on said first adjustment member and having a second pin thereon extending into a groove in said second adjustment member.
Claim 2
Independent Claim
243 words
A device for adjusting the position of a light source adapted for mounting on the frame of a projector comprising: a. a flat base member detachably secured to said frame and having: i. a first flat lever member pivoted at one end to said base member and having a first upstanding pin extending away from said base member on its opposite end; and ii. a threaded rod fixed to said base member diametrically opposite said first lever member and extending in the same direction as said first upstanding pin; b. a first flat adjustment member having a first aperture therein fOr receiving said threaded rod and means thereon cooperating with said threaded rod and said first upstanding pin by which said first adjustment member is mounted to said base member for adjustment of the spacing between said base member and said first adjustment member and for adjustment in one angular direction in a plane parallel to that of said base member; and c. a second flat adjustment member carrying the light source and pivotably mounted on said first flat adjustment member for adjusting the position of the light source in another angular direction in a plane parallel to that of said base member by means including: i. a pivot on said first adjustment member; and ii. a second flat lever member pivotally mounted on said first adjustment member and having a second pin thereon extending into a groove in said second adjustment member.
Claim 3
Dependent Claim
121 words
A device as in claim 1 wherein said cooperating means on said first flat adjustment member comprises: i. a bent portion at an edge of said first adjustment member with an extension thereon having a second aperture therein disposed opposite said first aperture and for receiving said threaded rod; ii. a nut member threadably mounted on said threaded rod between said first and second apertures; iii. a pair of arms extending from said first adjustment member diametrically opposite said bent portion for receiving said first upstanding pin between them and having aperture means thereon for receiving a screw member; and iv. a screw member threadably mounted through said aperture means for releasably clamping said first pin between said pair of arms.
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |