Patent US3692391A successfully refreshed from Google Patents.
US3692391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projector for use with containers for motion picture film
Assignee: Agfa Gevaert NV
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Filing: 1970-12-17
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Granted: 1972-09-19
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Expires: 1990-12-17
Abstract
Abstract The housing of a projector for use with cassettes for convoluted motion picture film defines a channel for lengthwise movement of shorter or longer trays which store stacks of cassettes. A blocking lever normally extends into the path of lengthwise movement of an inserted tray to arrest the tray in a starting position one step ahead of that position in which the foremost cassette in the tray is located in a projection position. The blocking lever is automatically moved away from the path of the inserted tray when the transporting mechanism which serves to move the tray lengthwise is operated in the starting position of the tray. The housing carries a pawl which engages a toothed portion of the inserted tray to prevent its movement in the rearward direction. The tray carries a pusher which causes the blocking lever to open a switch in the electric circuit of the projector when the transporting mechanism advances the tray beyond the starting position through such a distance that the rearmost cassette in a filled tray is moved beyond the projection position.
Inventors
- 👤 Alfred Winkler
- 👤 Johann Zanner Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:25
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/02; G03B21/14; G03B21/32; G03B21/321; G03B21/323
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
202 words
In a projector for use with cassettes for motion picture film, a combination comprising a support defining an elongated path; an elongated magazine for a stack of cassettes, said magazine being insertable into and being movable along said path in a predetermined direction toward and beyond a starting position; a transporting mechanism for said magazine, said mechanism being mounted in said support and being operable to advance the magazine beyond said starting position; and blocking means movably mounted in said support and normally extending into a predetermined portion of said path to arrest the magazine against further movement beyond said starting position, said transporting mechanism comprising displacing means arranged to move said blocking means away from said predetermined portion of said path in response to operation of said mechanism in the starting position of said magazine whereby said mechanism is free to move the magazine beyond said starting position, said magazine having means for preventing a return movement of said blocking means into said predetermined portion of said path as long as any portion of said magazine is located in said predetermined portion so that said blocking means can re-enter said path only when the magazine is moved beyond said predetermined portion.
Claim 2
Dependent Claim
202 words
In a projector for use with cassettes for motion picture film, a combination comprising a support defining an elongated path; an elongated magazine for a stack of cassettes, said magazine being insertable into and being movable along said path in a predetermined direction toward and beyond a starting position; a transporting mechanism for said magazine, said mechanism being mounted in said support and being operable to advance the magazine beyond said starting position; and blocking means movably mounted in said support and normally extending into a predetermined portion of said path to arrest the magazine against further movement beyond said starting position, said transporting mechanism comprising displacing means arranged to move said blocking means away from said predetermined portion of said path in response to operation of said mechanism in the starting position of said magazine whereby said mechanism is free to move the magazine beyond said starting position, said magazine having means for preventing a return movement of said blocking means into said predetermined portion of said path as long as any portion of said magazine is located in said predetermined portion so that said blocking means can re-enter said path only when the magazine is moved beyond said predetermined portion.
Claim 3
Dependent Claim
32 words
A combination as defined in claim 1, wherein said blocking means comprises a lever which is pivotable with said blocking means comprises a lever which is pivotable with reference to said support.
Claim 4
Dependent Claim
41 words
A combination as defined in claim 1, further comprising at least one additional magazine whose length is different from the length of said first mentioned magazine, said additional magazine being insertable into said path upon withdrawal of said first mentioned magazine.
Claim 5
Dependent Claim
26 words
A combination as defined in claim 1, further comprising arresting means provided on said support for preventing movement of said magazine counter to said predetermined direction.
Claim 6
Dependent Claim
27 words
A combination as defined in claim 1, wherein said support constitutes the housing of the projector and comprises two elongated parallel guide rails which define said path.
Claim 7
Dependent Claim
56 words
A combination as defined in claim 1, wherein said magazine comprises pusher means for displacing said blocking means in response to mOvement of said magazine through a predetermined distance beyond said starting position, and further comprising electric switch means actuated by said blocking means in response to displacement of the blocking means by said pusher means.
Claim 8
Dependent Claim
174 words
In a projector for use with cassettes for motion picture film, a combination comprising a support defining an elongated path; an elongated tray for a stack of cassettes, said tray being insertable into and being movable along said path in a predetermined direction toward and beyond a starting position and having a longitudinally extending toothed rack; a transporting mechanism for said tray, said mechanism being mounted in said support and being operable to advance the tray beyond said starting position, said mechanism comprising a pinion rotatably mounted in said support and meshing with said rack not later than when the tray reaches said starting position; and blocking means movably mounted in said support and normally extending into said path to arrest the tray against further movement beyond said starting position, said transporting mechanism further comprising displacing means arranged to move said blocking means away from said path in response to operation of said mechanism in the starting position of said tray whereby said mechanism is free to move the tray beyond said starting position.
Claim 9
Dependent Claim
174 words
In a projector for use with cassettes for motion picture film, a combination comprising a support defining an elongated path; an elongated tray for a stack of cassettes, said tray being insertable into and being movable along said path in a predetermined direction toward and beyond a starting position and having a longitudinally extending toothed rack; a transporting mechanism for said tray, said mechanism being mounted in said support and being operable to advance the tray beyond said starting position, said mechanism comprising a pinion rotatably mounted in said support and meshing with said rack not later than when the tray reaches said starting position; and blocking means movably mounted in said support and normally extending into said path to arrest the tray against further movement beyond said starting position, said transporting mechanism further comprising displacing means arranged to move said blocking means away from said path in response to operation of said mechanism in the starting position of said tray whereby said mechanism is free to move the tray beyond said starting position.
Claim 10
Dependent Claim
49 words
A combination as defined in claim 7, wherein said transporting mechanism further comprises a shaft rotatable in a preselected direction and a friction clutch for rotating said pinion in response to rotation of said shaft when the resistance offered by said pinion to rotation is below a predetermined value.
Claim 11
Dependent Claim
180 words
In a projector for use with cassettes for motion picture film, a combination comprising a support defining an elongated path; an elongated magazine for a stack of cassettes, said magazine being insertable into and being movable along said path in a predetermined direction toward and beyond a starting position and having a toothed portion; a transporting mechanism for said magazine, said mechanism being mounted in said support and being operable to advance the magazine beyond said starting position; blocking means movably mounted in said support and normally extending into said path to arrest the magazine against further movement beyond said starting position, said transporting mechanism comprising displacing means arranged to move said blocking means away from said path in response to operation of said mechanism in the starting position of said magazine whereby said mechanism is free to move the magazine beyond said starting position; and arresting means provided on said support for preventing a movement of said magazine counter to said predetermined direction, said arresting means comprising a pawl which is biased against said toothed portion of said magazine.
Claim 12
Dependent Claim
180 words
In a projector for use with cassettes for motion picture film, a combination comprising a support defining an elongated path; an elongated magazine for a stack of cassettes, said magazine being insertable into and being movable along said path in a predetermined direction toward and beyond a starting position and having a toothed portion; a transporting mechanism for said magazine, said mechanism being mounted in said support and being operable to advance the magazine beyond said starting position; blocking means movably mounted in said support and normally extending into said path to arrest the magazine against further movement beyond said starting position, said transporting mechanism comprising displacing means arranged to move said blocking means away from said path in response to operation of said mechanism in the starting position of said magazine whereby said mechanism is free to move the magazine beyond said starting position; and arresting means provided on said support for preventing a movement of said magazine counter to said predetermined direction, said arresting means comprising a pawl which is biased against said toothed portion of said magazine.
Claim 13
Dependent Claim
172 words
In a projector for use with cassettes for motion picture film, a combination comprising a support defining an elongated path; an elongated magazine for a stack of cassettes, said magazine being insertable into and being movable along said path in a predetermined direction toward and beyond a starting position; a transporting mechanism for said magazine, said mechanism being mounted in said support and being operable to advance the magazine beyond said starting position; and blocking means movably mounted in said support and normally extending into said path to arrest the magazine against further movement beyond said starting position, said transporting mechanism comprising displacing means arranged to move said blocking means away from said path in response to operation of said mechanism in the starting position of said magazine whereby said mechanism is free to move the magazine beyond said starting position, said blocking means comprising a portion which is accessible to and movable by the operator to thereby move said blocking means away from said path at the will of the operator.
Claim 14
Dependent Claim
172 words
In a projector for use with cassettes for motion picture film, a combination comprising a support defining an elongated path; an elongated magazine for a stack of cassettes, said magazine being insertable into and being movable along said path in a predetermined direction toward and beyond a starting position; a transporting mechanism for said magazine, said mechanism being mounted in said support and being operable to advance the magazine beyond said starting position; and blocking means movably mounted in said support and normally extending into said path to arrest the magazine against further movement beyond said starting position, said transporting mechanism comprising displacing means arranged to move said blocking means away from said path in response to operation of said mechanism in the starting position of said magazine whereby said mechanism is free to move the magazine beyond said starting position, said blocking means comprising a portion which is accessible to and movable by the operator to thereby move said blocking means away from said path at the will of the operator.
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |