Patent US4174887A successfully refreshed from Google Patents.
US4174887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotatable stage for a camera
Assignee: Individual
•
Filing: 1978-01-18
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Granted: 1979-11-20
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Expires: 1998-01-18
Abstract
Abstract A stage for a slide camera has a two-railed circular track on a base. The rails are conductive and connected to a photostat-controlled electric power pack. On the track are a plurality of trucks having upstanding support members which carry a platform with a translucent central region. One of the trucks has a motor which is powered by the electric current in the rails to rotate the platform.
Inventors
- 👤 Douglas T. Mesney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:23
CPC Classifications
G; G03; G03B; G03B15/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
82 words
A rotatable stage for an object to be photographed comprising a base, a circular track on said base, said circular track having at least two conductive rails, a source of electric current connected across said two conductive rails, a plurality of trucks spaced about said track, at least one of said trucks being electric motorized and energized by electric current in said two conductive rails, each of said trucks having an upstanding support member, and a platform fixed to said support members.
Claim 2
Dependent Claim
82 words
A rotatable stage for an object to be photographed comprising a base, a circular track on said base, said circular track having at least two conductive rails, a source of electric current connected across said two conductive rails, a plurality of trucks spaced about said track, at least one of said trucks being electric motorized and energized by electric current in said two conductive rails, each of said trucks having an upstanding support member, and a platform fixed to said support members.
Claim 3
Dependent Claim
15 words
The stage of claim 1 wherein the central portion of said platform is light transmissive.
Claim 4
Dependent Claim
12 words
The stage of claim 2 wherein the base has a central opening.
Claim 5
Dependent Claim
21 words
The stage of claim 1 further comprising mechanical stop means for stopping the rotation of the stage at a particular position.
Claim 6
Dependent Claim
24 words
The stage of claim 1 wherein said circular track comprises a pair of concentrically parallel rails and tie means for mechanical spacing said rails.
Claim 7
Dependent Claim
29 words
The stage of claim 1 wherein said source of electric current includes means for controlling the flow of electric current and thus the speed of rotation of said platform.
Claim 8
Dependent Claim
131 words
A rotatable stage for an object to be photographed comprising a base, a circular track on said base, said circular track having at least two conductive rails which are concentrically parallel and tie means for mechanically spacing said rails, a source of electric current connected across said two conductive rails said source of electric current includes means for controlling the flow of electric current and thus the speed of rotation of said platform, a plurality of trucks spaced about said track, at least one of said trucks being electric motorized and energized by electric current in said two conductive rails, each of said trucks having an upstanding support member, a platform fixed to said support members, and mechanical stop means for stopping the rotation of the stage at a particular position.
Claim 9
Dependent Claim
131 words
A rotatable stage for an object to be photographed comprising a base, a circular track on said base, said circular track having at least two conductive rails which are concentrically parallel and tie means for mechanically spacing said rails, a source of electric current connected across said two conductive rails said source of electric current includes means for controlling the flow of electric current and thus the speed of rotation of said platform, a plurality of trucks spaced about said track, at least one of said trucks being electric motorized and energized by electric current in said two conductive rails, each of said trucks having an upstanding support member, a platform fixed to said support members, and mechanical stop means for stopping the rotation of the stage at a particular position.
Claim 10
Dependent Claim
22 words
The stage of claim 7 wherein the central portion of said platform is light transmissive and the base has a central opening.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-19 | 1983-05-21 | 1983-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-19 | 1987-05-21 | 1987-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-19 | 1991-05-21 | 1991-11-20 | $7700.00 | Window Closed / Lapsed |