GB1439047A – Optical sensing apparatus
– Google Patents
GB1439047A – Optical sensing apparatus
– Google Patents
Optical sensing apparatus
Info
Publication number
GB1439047A
GB1439047A
GB4262473A
GB4262473A
GB1439047A
GB 1439047 A
GB1439047 A
GB 1439047A
GB 4262473 A
GB4262473 A
GB 4262473A
GB 4262473 A
GB4262473 A
GB 4262473A
GB 1439047 A
GB1439047 A
GB 1439047A
Authority
GB
United Kingdom
Prior art keywords
gate
film
sept
fed
mark
Prior art date
1972-09-12
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4262473A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1972-09-12
Filing date
1973-09-11
Publication date
1976-06-09
1973-09-11
Application filed by Ricoh Co Ltd
filed
Critical
Ricoh Co Ltd
1976-06-09
Publication of GB1439047A
publication
Critical
patent/GB1439047A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
G—PHYSICS
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
G03B27/00—Photographic printing apparatus
G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
G03B27/52—Details
G03B27/62—Holders for the original
G03B27/6271—Holders for the original in enlargers
G03B27/6285—Handling strips
Abstract
1439047 Photo-electric data retrieval systems RICOH KK 11 Sept 1973 [12 Sept 1972] 42624/73 Heading G1A The direction of travel of a roll-film in a projection-type data-retrieval apparatus is determined by the phase-sense of pulses from a pair of photoelectric cells successively obscured by a mark beside each film frame. In Fig. 1 the mark in view by cells 23, 24 through mirrors 25, 27 and lens 26 alongside the projection system. AUTOMATIC KEYBOARD CONTROL. Fig. 3, (not shown). As shown, the cell signals are fed through logarithmic amplifiers (29), (30), (to compensate for variations in illumination due to lamp voltage variation or dirt on the “optics”) and added in a differential amplifier (31). The resultant is fed to positive and negative channels, each comprising a switching circuit (32), gate (34) and differentiating and shaping circuits (43), (44) to OR gate (45). The gate in the appropriate channel is opened by comparator (38) responsive to the setting of keyboard (40), and UP-DOWN counter (41) to control the film-drive-motor (not shown). Alternative manual positioning is provided by switch (39) and potentiometer (42) over-riding the comparator output.
GB4262473A
1972-09-12
1973-09-11
Optical sensing apparatus
Expired
GB1439047A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
JP47090921A
JPS5213932B2
(en)
1972-09-12
1972-09-12
Publications (1)
Publication Number
Publication Date
GB1439047A
true
GB1439047A
(en)
1976-06-09
Family
ID=14011876
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB4262473A
Expired
GB1439047A
(en)
1972-09-12
1973-09-11
Optical sensing apparatus
Country Status (4)
Country
Link
US
(1)
US3870410A
(en)
JP
(1)
JPS5213932B2
(en)
CA
(1)
CA996789A
(en)
GB
(1)
GB1439047A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4608705A
(en)
*
1983-03-01
1986-08-26
Canon Kabushiki Kaisha
Information retrieval apparatus capable of stopping an information bearing medium accurately at a desired location
Families Citing this family (10)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4028552A
(en)
*
1974-11-15
1977-06-07
Beta Corporation
Image counter
JPS5344025A
(en)
*
1976-08-27
1978-04-20
Fuji Photo Film Co Ltd
Image formation method
US4453823A
(en)
*
1981-05-25
1984-06-12
Canon Kabushiki Kaisha
Method of stopping a film
US4609779A
(en)
*
1984-06-13
1986-09-02
Minnesota Mining And Manufacturing Company
Teleconferencing graphics apparatus and system
US5137347A
(en)
*
1988-02-16
1992-08-11
Canon Kabushiki Kaisha
Information retrieval apparatus
US5289262A
(en)
*
1992-03-09
1994-02-22
Calcomp Inc.
Photodiode transmissive media sensor for aligning media
JP2829455B2
(en)
*
1992-03-27
1998-11-25
富士写真フイルム株式会社
Developing method of silver halide photographic material
JP2824879B2
(en)
*
1992-03-27
1998-11-18
富士写真フイルム株式会社
Developing method of silver halide photographic material
EP0793140B1
(en)
*
1996-03-04
2000-08-09
Fuji Photo Film Co., Ltd.
Processing composition for silver halide photographic light-sensitive material, developer and processing method using the same
US6293081B1
(en)
*
1997-06-12
2001-09-25
Siecor Operations, Llc
Fiber optic cable marking process and a sensor device use therewith
Family Cites Families (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3299272A
(en)
*
1963-02-09
1967-01-17
Ricoh Kk
Photosensitive system for taking out desired portions of records on microfilm
US3744890A
(en)
*
1970-10-09
1973-07-10
Ricoh Kk
System for searching for desired information
1972
1972-09-12
JP
JP47090921A
patent/JPS5213932B2/ja
not_active
Expired
1973
1973-08-28
US
US392178A
patent/US3870410A/en
not_active
Expired – Lifetime
1973-09-11
GB
GB4262473A
patent/GB1439047A/en
not_active
Expired
1973-09-11
CA
CA180,730A
patent/CA996789A/en
not_active
Expired
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4608705A
(en)
*
1983-03-01
1986-08-26
Canon Kabushiki Kaisha
Information retrieval apparatus capable of stopping an information bearing medium accurately at a desired location
Also Published As
Publication number
Publication date
DE2345817A1
(en)
1974-03-28
CA996789A
(en)
1976-09-14
JPS4946939A
(en)
1974-05-07
US3870410A
(en)
1975-03-11
DE2345817B2
(en)
1976-11-11
JPS5213932B2
(en)
1977-04-18
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Legal Events
Date
Code
Title
Description
1976-10-20
PS
Patent sealed [section 19, patents act 1949]
1987-04-29
PCNP
Patent ceased through non-payment of renewal fee
