Patent US3603675A successfully refreshed from Google Patents.
US3603675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion picture film reproducing apparatus and method with provision for translation of stop-motion coding
Assignee: Visual Instruction Systems Inc
•
Filing: 1969-07-28
•
Granted: 1971-09-07
•
Expires: 1989-07-28
Abstract
Abstract A copy of a motion picture film is prepared and provided with stop-motion coding in the form of a strip along the sprocket edge which includes emulsion-free segments. To accomplish this, an auxiliary light source is focused on the sprocket edge, and a shutter is moved into and out of blocking position to produce alternate emulsion-free and emulsion-covered segments along that edge. The shutter is operated by a solenoid under control of a relay. When the copy film is reproduced from a master film having stop-motion indicia in the form of successive notches indicating the start and finish respectively of a stop-motion segment, the relay embodies a push-push type of movement and is under the control of a microswitch which senses the notches and pulses the relay at the start and finish.
Inventors
- 👤 Charles Woodruff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:41
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/24; G03B17/245; G03D; G03D15/00; G03B2217/00; G03B2217/24; G03B2217/242; G03B2217/243
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
184 words
In apparatus for reproducing master motion picture film having indicia thereon positioned in predetermined relation to the beginning and end respectively of a stop-motion segment on said master film, said apparatus including means for simultaneously advancing both said master film and a copy film and projecting the sequences of frames of said master film for reproduction upon said copy film; the improvement comprising: strip-exposing means including a light source arranged for exposing a fixed point which traces a longitudinal strip on said copy film as said copy film advances; means operable for selectively enabling and disabling said strip-exposing means whereby to obtain a selected sequence of alternate exposed and unexposed segments along the length of said longitudinal strip; an electrically controlled actuator arranged to operate said enabling and disabling means between the enabling and disabling conditions thereof; and means for controlling said actuator, including an electrical circuit for energizing said actuator, means for sensing said master film stop-motion indicia, and electrical switching means responsive to said sensing means for respectively opening and closing said energizing circuit upon the occurrence of successive indicia detection events.
Claim 2
Dependent Claim
184 words
In apparatus for reproducing master motion picture film having indicia thereon positioned in predetermined relation to the beginning and end respectively of a stop-motion segment on said master film, said apparatus including means for simultaneously advancing both said master film and a copy film and projecting the sequences of frames of said master film for reproduction upon said copy film; the improvement comprising: strip-exposing means including a light source arranged for exposing a fixed point which traces a longitudinal strip on said copy film as said copy film advances; means operable for selectively enabling and disabling said strip-exposing means whereby to obtain a selected sequence of alternate exposed and unexposed segments along the length of said longitudinal strip; an electrically controlled actuator arranged to operate said enabling and disabling means between the enabling and disabling conditions thereof; and means for controlling said actuator, including an electrical circuit for energizing said actuator, means for sensing said master film stop-motion indicia, and electrical switching means responsive to said sensing means for respectively opening and closing said energizing circuit upon the occurrence of successive indicia detection events.
Claim 3
Dependent Claim
48 words
Apparatus as in claim 1 wherein: said strip-exposing means is arranged in relation to said frame projecting means so that the boundaries between said exposed and unexposed strip segments are located in predetermined relation to the reproduction son said copy film of respective frames of said stop-motion segment.
Claim 4
Dependent Claim
41 words
Apparatus as in claim 2 wherein: said strip-exposing means is arranged to expose said strip at a location 1 1/2 frames of said copy film in advance of the location at which said frame projecting means reproduces said master film frames.
Claim 5
Dependent Claim
47 words
Apparatus as in claim 1 wherein: said enabling and disabling means is a shutter mechanism operable between respective positions for selectively blocking and unblocking the light from said strip-exposing source; and said actuator is arranged to operate said shutter mechanism selectively between said blocking and unblocking positions.
Claim 6
Dependent Claim
24 words
Apparatus as in claim 4 wherein: said actuator is a solenoid arranged to drive said shutter mechanism to one of said positions when energized.
Claim 7
Dependent Claim
33 words
Apparatus as in claim 5 wherein: said solenoid is arranged to release said shutter mechanism when deenergized; and said apparatus includes means for returning said shutter to the other position upon its release.
Claim 8
Dependent Claim
25 words
Apparatus as in claim 6 wherein: said switching means comprises a relay connected to energize and deenergized said solenoid in response to said sensing means,
Claim 9
Dependent Claim
122 words
Apparatus as in claim 7 wherein: said sensing means comprises means for detecting stop-motion indicia in the form of notches on said master film, and means connected to energize said relay in response to each notch-detecting event; and said relay is of the type which energizes said shutter actuator solenoid when said relay is energized one time by said sensing means and deenergizes said shutter actuator solenoid when said relay is energized the following time by said sensing means, whereby one stop-motion indicating notch on said master film opens said shutter to begin exposing said longitudinal strip on said copy film and the following notch on said master film closes said shutter to stop exposing said longitudinal strip on said copy film.
Claim 10
Independent Claim
189 words
A method of producing a motion picture copy film with stop-motion coding in the form of a longitudinal strip of alternate emulsion-covered areas and nonemulsion-covered areas, from a master film having a different form of stop-motion coding, comprising the steps of: simultaneously advancing both said master film and said copy film while projecting the sequence of frames of said master film upon said copy film; directing a light beam at a fixed point which traces the desired longitudinal strip on said copy film as said copy film is advanced, said point having a predetermined position relative to the location at which said frames are projected on said copy film; detecting said stop-motion coding on said master; controlling said light beam in accordance with said detected stop-motion coding of said master so that said copy film is exposeD to said light beam from the time a first frame in a stop-motion segment is projected until the first frame following said stop-motion segment is projected, and only during that time; and thereafter developing said copy film to remove the emulsion therefrom in the areas which were exposed to said light source.
Claim 11
Independent Claim
189 words
A method of producing a motion picture copy film with stop-motion coding in the form of a longitudinal strip of alternate emulsion-covered areas and nonemulsion-covered areas, from a master film having a different form of stop-motion coding, comprising the steps of: simultaneously advancing both said master film and said copy film while projecting the sequence of frames of said master film upon said copy film; directing a light beam at a fixed point which traces the desired longitudinal strip on said copy film as said copy film is advanced, said point having a predetermined position relative to the location at which said frames are projected on said copy film; detecting said stop-motion coding on said master; controlling said light beam in accordance with said detected stop-motion coding of said master so that said copy film is exposeD to said light beam from the time a first frame in a stop-motion segment is projected until the first frame following said stop-motion segment is projected, and only during that time; and thereafter developing said copy film to remove the emulsion therefrom in the areas which were exposed to said light source.
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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |