US4702579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic film sensitivity change-over device
Assignee: Seikosha KK
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Filing: 1985-08-15
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Granted: 1987-10-27
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Expires: 2005-08-15
Abstract
Abstract A device which includes means for detecting a film sensitivity code based upon International Standardization Organization and provided on a film cartridge when the film cartridge is loaded, whereby it is determined whether or not a film is one whose cartridge has a code provided thereon by adding 1 to the film sensitivity code detected the means to detect if a carry-over appears or not.
Inventors
- 👤 Masuo Ogihara
- 👤 Hajime Oda
- 👤 Yoichi Seki
- 👤 Hiroshi Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:56
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/24
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
192 words
An automatic film sensitivity reading device for a camera of the type equipped to receive either a coded film package containing a coded film sensitivity indication or an uncoded film package containing no coded film sensitivity indication, the device comprising: reading means operative when a coded film package is loaded in the camera for reading a coded film sensitivity indication contained on the film package and producing n-bit binary data comprised of n bits having high and low logic levels representative of the coded film sensitivity indication, and operative when an uncoded film package is loaded in the camera for producing n-bit primary data comprised of n bits all having the same logic level; calculating means for adding one-bit binary data having the same logic level as that of the n-bit binary data corresponding to an uncoded film package to the n-bit binary data produced by the reading means; and detecting means for detecting when a carry-over is produced by the calculating means by the addition of the one-bit binary data to thereby determine that a uncoded film package has been loaded in the camera based on the detection of the carry-over.
Claim 2
Dependent Claim
192 words
An automatic film sensitivity reading device for a camera of the type equipped to receive either a coded film package containing a coded film sensitivity indication or an uncoded film package containing no coded film sensitivity indication, the device comprising: reading means operative when a coded film package is loaded in the camera for reading a coded film sensitivity indication contained on the film package and producing n-bit binary data comprised of n bits having high and low logic levels representative of the coded film sensitivity indication, and operative when an uncoded film package is loaded in the camera for producing n-bit primary data comprised of n bits all having the same logic level; calculating means for adding one-bit binary data having the same logic level as that of the n-bit binary data corresponding to an uncoded film package to the n-bit binary data produced by the reading means; and detecting means for detecting when a carry-over is produced by the calculating means by the addition of the one-bit binary data to thereby determine that a uncoded film package has been loaded in the camera based on the detection of the carry-over.
Claim 3
Dependent Claim
34 words
An automatic film sensitivity reading device according to claim 1; wherein the reading means includes means for reading a coded film package which contains a binary-coded film sensitivity indication according to the ISO system.
Claim 4
Dependent Claim
38 words
An automatic film sensitivity reading device according to claim 2; wherein the reading means includes means for reading a coded film package which includes a set of code members arranged thereon for defining the binary-coded film sensitivity indication.
Claim 5
Dependent Claim
36 words
An automatic film sensitivity reading device according to claim 3; wherein the reading means includes a set of contacts positioned to oppose the set of code members of the loaded film package for detecting the same.
Claim 6
Dependent Claim
20 words
An automatic film sensitivity reading device according to claim 4; wherein the set of contacts comprises n number of contacts.
Claim 7
Dependent Claim
47 words
An automatic film sensitivity reading device according to claim 5; wherein the n number of contacts operates to produce n-bit binary data comprised of n bits all having the same logic level when none of the n number of contacts detects the set of the code members.
Claim 8
Dependent Claim
39 words
An automatic film sensitivity reading device according to claim 1; including converting means connected to the reading means for converting the n-bit binary data representative of the coded film sensitivity indication to a code signal suitable for apex operation.
Claim 9
Dependent Claim
19 words
An automatic film sensitivity reading device according to claim 7; wherein the converting means comprises a programmable logic array.
Claim 10
Dependent Claim
31 words
An automatic film sensitivity reading device according to claim 1; including input means for manually inputting a film sensitiviy data when an uncoded film package has been loaded in the camera.
Claim 11
Dependent Claim
24 words
An automatic film sensitivity reading device according to claim 1; wherein the calculating means comprises an n-bit counter having a carry signal output terminal.
Claim 12
Dependent Claim
25 words
An automatic film sensitivity reading device according to claim 10; wherein the detecting means comprises a D-type flip-flop connected to the carry signal output terminal.
References Cited (Backward Citations)
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US4512643A
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US4598986A
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US4538890A
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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) | 1990-10-26 | 1991-04-27 | 1991-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-26 | 1995-04-27 | 1995-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-26 | 1999-04-27 | 1999-10-27 | $7700.00 | Window Closed / Lapsed |