US3730619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for information retrieval
Assignee: Ricoh Co Ltd
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Filing: 1970-02-17
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Granted: 1973-05-01
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Expires: 1990-02-17
Abstract
Abstract A method and apparatus for information retrieval wherein an endless film recording informations thereupon is advanced and the counting is started upon detection of the zero (reference) position of said film and when the counting reaches a predetermined value, the film is automatically stopped.
Inventors
- 👤 S Fujimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:13
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G03B21/11; G03B21/111
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
218 words
An information retrieval system comprising a cartridge enclosing therein a film recording thereupon a plurality of informations and a main body of said system for retrieving a desired one from said plurality of informations, said main body including means for detachably mounting said cartridge, a sprocket wheel for engagement with said film for advancing the same, means for driving said sprocket wheel, pulse generating means for actuating said sprocket driving means, means for giving an information retrieval instruction, means for detecting the zero position of said film, counting means for starting the counting immediately after said zero position has been detected, means for stopping said driving device when the contents of said counting means reaches a predetermined value and turning on a projection lamp, means for projecting an information retrieved, light source means for said projection means, switching means for turning on and off said light source means, pressure plate means for holding said film in stationary position when said film is stopped, means for actuating said pressure plate means, erratic operation preventive means for preventing the energization of said driving device when said film is stopped and said light source means is turned on and safety means for energizing all of the electric circuits of said system only when said cartridge is mounted upon said main body.
Claim 2
Dependent Claim
218 words
An information retrieval system comprising a cartridge enclosing therein a film recording thereupon a plurality of informations and a main body of said system for retrieving a desired one from said plurality of informations, said main body including means for detachably mounting said cartridge, a sprocket wheel for engagement with said film for advancing the same, means for driving said sprocket wheel, pulse generating means for actuating said sprocket driving means, means for giving an information retrieval instruction, means for detecting the zero position of said film, counting means for starting the counting immediately after said zero position has been detected, means for stopping said driving device when the contents of said counting means reaches a predetermined value and turning on a projection lamp, means for projecting an information retrieved, light source means for said projection means, switching means for turning on and off said light source means, pressure plate means for holding said film in stationary position when said film is stopped, means for actuating said pressure plate means, erratic operation preventive means for preventing the energization of said driving device when said film is stopped and said light source means is turned on and safety means for energizing all of the electric circuits of said system only when said cartridge is mounted upon said main body.
Claim 3
Dependent Claim
72 words
An information retrieval system as specified in claim 1 wherein said means for detachably mounting said cartridge upon said main body comprises an operating lever; and an engaging lever means, said engaging lever means which releasably engages with said operating lever which in turn releasably engages with said cartridge is retracted from the path of said operating lever when the zero position of said film is detected, thereby permitting the actuation thereof.
Claim 4
Dependent Claim
26 words
An information retrieval as specified in claim 1 wherein said sprocket wheel is driven by a pulse motor which rotates in stepwise by a pulse train.
Claim 5
Dependent Claim
49 words
An informatiOn retrieval system as specified in claim 1 wherein an engaging pin is provided; and when said cartridge is detached from said main body, said pin engages said sprocket wheel so that said sprocket wheel is held in stationary position corresponding to said zero position of said film.
Claim 6
Dependent Claim
80 words
An information retrieval system as specified in claim 1 wherein said light source switching means comprising a switch which closes a circuit for turning on said light source only when said pressure plate means presses and holds said film in position in response to the displacement of said pressure plate means, a switch which closes a circuit for advancing said film only when said pressure plate means is moved away from said film and means for switching said two switches.
Claim 7
Dependent Claim
209 words
An information retrieval system as specified in claim 1 wherein said pressure plate actuating means comprises an L-shaped lever rotatably fixed to the inner surface of a casing of said system and extending upwardly extending from said casing, a pressure plate retaining plate which has said pressure plate pivotably fixed thereto and is pivotably fixed to the upper end of said L-shaped lever, a film holding plate disposed vertically at the upper portion of said casing in opposed relation with said film pressure plate, another L-shaped lever securely fixed to said first mentioned L-shaped lever but pivotally fixed to said casing, a switch for film advancing circuit and a switch for light source circuit disposed on both sides of said second mentioned L-shaped lever in opposed relation with each other through said second mentioned L-shaped lever, both of said switches being firmly fixed to said casing, an actuating spring one end of which is fitted into a hole formed through the other end portion of said second mentioned L-shaped lever and a solenoid securely fixed to said casing, the plunger of said solenoid having the other end of said actuating spring drivingly coupled to the free end of said plunger, said solenoid being energized when said film is stopped.
Claim 8
Dependent Claim
62 words
An information retrieval system as specified in claim 6 wherein said erratic operation preventive means is such that in response to the actuation of said pressure plate means for moving away from said film, said second mentioned L-shaped lever closes said switch for film advancing circuit while said switch opens when said pressure plate means is holding said film in stationary position.
Claim 9
Dependent Claim
84 words
An information retrieval system as specified in claim 1 wherein said safety means comprises a main switch securely fixed to the inside of said casing, the actuating member of said main switch extending upwardly through an opening formed through an upper surface of said casing and being adapted to be depressed by the bottom of said cartridge when the latter is mounted upon said casing, thereby closing said main switch while said main switch remains opened when said cartridge is detached from said casing.
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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |