US3697161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circular tray support and indexing apparatus
Assignee: Rollei of America Inc
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Filing: 1970-04-01
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Granted: 1972-10-10
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Expires: 1990-04-01
Abstract
Abstract A unique elongated indexing means and bowed shaped tray supporting means for use in a slide projector to enable circular trays that are of different diameters to be rotatably supported on a common support and to enable each of these different size trays to be indexed by a common indexing means.
Inventors
- 👤 Stephen Blecher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:53
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/02; G03B23/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
137 words
An apparatus for supporting and indexing circular trays of different diameters on a projector, comprising a pair of spaced apart bowed shaped members operably connected to a vertical side wall of a trough of the projector to support any two spaced apart portions of an outer annular surface of any one of said different size diameter circular trays thereon in a substantially vertical position and for rotary movement about a horizontal axis that passes through the center of any selected one of said different sized trays, said projector having a unitary elongated indexing pinion operably positioned thereon and forming a series of axially displaced bands of teeth, and a different one of said bands being positioned for engagement with indexing teeth formed on a different one of said supported trays that are each of a different diameter.
Claim 2
Independent Claim
137 words
An apparatus for supporting and indexing circular trays of different diameters on a projector, comprising a pair of spaced apart bowed shaped members operably connected to a vertical side wall of a trough of the projector to support any two spaced apart portions of an outer annular surface of any one of said different size diameter circular trays thereon in a substantially vertical position and for rotary movement about a horizontal axis that passes through the center of any selected one of said different sized trays, said projector having a unitary elongated indexing pinion operably positioned thereon and forming a series of axially displaced bands of teeth, and a different one of said bands being positioned for engagement with indexing teeth formed on a different one of said supported trays that are each of a different diameter.
Claim 3
Dependent Claim
40 words
The circular tray supporting and indexing apparatus defined in claim 1 wherein the bowed shaped members are positioned in different angularly displaced positions from one another about said central horizontal axis of any selected one of said different sized trays.
Claim 4
Dependent Claim
59 words
The tray supporting and indexing apparatus defined by claim 1 wherein each of the supporting members have a mounting portion that is fixedly retained in the vertical wall forming a slotted out portion of said trough and wherein the bowed shaped members are in the form of protuberances that extend outwardly away from said mounting portion into said trough.
Claim 5
Dependent Claim
103 words
The tray supporting and indexing apparatus defined by claim 1 wherein each of the supporting members have a mounting portion that is fixedly retained in a vertical wall forming a slotted out portion of said trough and wherein another wall portion of the trough that is opposite said first mentioned side wall portion is constructed to provide a contacting surface against which a ring portion formed on a face of any one of said trays can be rotatably engaged and to provide a means of retaining the outer circumferential surface of said tray in spaced apart relationship with the base of the trough.
Claim 6
Dependent Claim
60 words
The tray supporting and indexing apparatus defined in claim 1 wherein each of its bowed shaped supporting members form lugs that extend from an inner side wall of the trough in a direction toward an outer side wall of said trough and provide separate bearing surfaces on which any one of said trays can be brought into line contact therewith.
Claim 7
Dependent Claim
66 words
The single multi size tray supporting and indexing apparatus defined in claim 1 wherein the bowed shaped members are sideably mounted in the side of a trough of the projector and a member covering an upper edge portion of the top of said last mentioned side of the trough is employed to retain the bowed shape members from moving in a vertical direction in the trough.
Claim 8
Dependent Claim
112 words
The single multi size tray supporting and indexing apparatus defined in claim 1 wherein wherein the bowed shaped members are sideably mounted In said vertical side of a trough of the projector, a member covering an upper edge portion of the top of said last mentioned side of the trough is employed to retain the bowed shaped members from moving in a vertical direction in the trough and wherein the slidable portion of each of said bowed shaped members is provided with a characteristically shaped protuberance for engaging a separate slot in said vertical side wall of the trough to retain the bowed shaped members against movement in a horizontal direction therein.
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |