US3886326A
Expired / Lapsed
US
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Data-sensing verification system and method
Assignee: T AND T Tech Inc
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Filing: 1973-06-08
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Granted: 1975-05-27
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Expires: 1993-06-08
Abstract
Abstract A data-sensing verification system and method for verifying the validity of a signal representative of data contained in a marking location on a document having a plurality of control marks associated with the marking location. The data is sensed and a signal is generated representative thereof. The control marks are sensed and control signals are generated in response thereto. The data signal is sampled in response to the control signals and an output indicative of the validity of the data signal is generated as a function of the existence of a selected relationship between the samples.
Inventors
- 👤 Edward E Horvath
- 👤 Robert M Janoski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:11
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/01; G06K7/016; G06K7/0163; G06K5/00
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
164 words
A data-sensing verification system for indicating the validity of a signal representative of data contained in a marking location on a document having a plurality of control marks associated with said marking location, said data taking the form of the presence or absence of a mark in said marking location, said system comprising: data-sensing means for sensing data in said marking location and for generating in response to the data sensed a data signal representative thereof, the data signal varying in value as a function of variations in the form of said data; control mark sensing means for sensing each of said control marks and for generating a plurality of control signals, one in response to the sensing of each control mark; and means for sampling said data signal in response to each of said control signals and for generating an indicating output indicative of the validity of said data signal as a function of the existance of a selected relationship between said samples.
Claim 2
Dependent Claim
164 words
A data-sensing verification system for indicating the validity of a signal representative of data contained in a marking location on a document having a plurality of control marks associated with said marking location, said data taking the form of the presence or absence of a mark in said marking location, said system comprising: data-sensing means for sensing data in said marking location and for generating in response to the data sensed a data signal representative thereof, the data signal varying in value as a function of variations in the form of said data; control mark sensing means for sensing each of said control marks and for generating a plurality of control signals, one in response to the sensing of each control mark; and means for sampling said data signal in response to each of said control signals and for generating an indicating output indicative of the validity of said data signal as a function of the existance of a selected relationship between said samples.
Claim 3
Dependent Claim
38 words
A data sensing verification system as claimed in claim 1, wherein said sampling means generates an output indicative of the invalidity of said data signal as a function of the absence of said selected relationship between said samples.
Claim 4
Dependent Claim
42 words
A data-sensing verification system as claimed in claim 2, wherein said control mark sensing means senses each of said control marks sequentially to generate time spaced control signals in response thereto, each of said time spaced control signals defining a sampling interval.
Claim 5
Dependent Claim
55 words
A data-sensing verification system as claimed in claim 3, wherein said sampling means includes first means responsive to each of said control signals for generating a sample signal representative of the value of the sampled data signal, and second means for generating said validity output in response to a selected relationship between said sample signals.
Claim 6
Dependent Claim
42 words
A data-sensing verification system as claimed in claim 4, wherein said first means is responsive to said data signal achieving a selected value during a sampling interval and to the control signal defining said sampling interval for generating a first sample signal.
Claim 7
Dependent Claim
43 words
A data-sensing verification system as claimed in claim 5, wherein said first means is responsive to said data sigNal not achieving said selected value during said sampling interval and to said control signal defining said sampling interval for generating a second sample signal.
Claim 8
Dependent Claim
29 words
A data-sensing verification system as claimed in claim 5, wherein said second means is responsive to a selected number of said first sample signals for generating said validity output.
Claim 9
Dependent Claim
33 words
A data-sensing verification system as claimed in claim 7, wherein said second means is responsibe to a number of said first sample signals different than said selected number for generating said invalidity output.
Claim 10
Dependent Claim
46 words
A data-sensing verification system as claimed in claim 6, wherein said second means is responsive to a selected number of said first sample signals for generating said validity output and is responsive to said selected number of said second sample signals for generating a validity output.
Claim 11
Dependent Claim
35 words
A data-sensing verification system as claimed in claim 9, wherein said second means is responsive to a number of said first and second sample signals different than said selected number for generating said invalidity signal.
Claim 12
Dependent Claim
34 words
A data-sensing verification system as claimed in claim 1, wherein said data sensing means generates a data signal which varies in value as a function of variations in said data within said marking location.
Claim 13
Dependent Claim
38 words
A data-sensing verification system as claimed in claim 11, wherein said data sensing means generates a data signal that varies in amplitude as a function of variations in the intensity of a data mark within said marking location.
Claim 14
Dependent Claim
58 words
A data-sensing verification system as claimed in claim 12, including threshold means responsive to said data signal for generating an output consisting of a first modified data signal in response to said data signal having at least a selected amplitude, and a second modified data signal in response to said data signal having less than said selected amplitude.
Claim 15
Dependent Claim
47 words
A data-sensing verification system as claimed in claim 13, wherein said sampling means includes first data storage means, and means for applying said modified data signals to said first data storage means, said data storage means generating an output corresponding to the modified data signal applied thereto.
Claim 16
Dependent Claim
121 words
A data-sensing verification system as claimed in claim 14, wherein said sampling means includes a plurality of second data storage means corresponding in number to the number of control marks associated with said marking location, means for applying the output of said first storage means to the inputs of each of said second storage means, and means responsive to each of said control signals for gating the output of said first storage means sequentially into successive ones of said second storage means to thereby sample and store the output of said first storage means in response to each of said control pulses, each of said second storage means generating a sample output corresponding to the value of the sample stored therein.
Claim 17
Dependent Claim
56 words
A data-sensing verification system as claimed in claim 15, including comparison means responsive to the sample outputs of said second data storage means for generating a validity signal when a preselected number of said sample outputs are the same, and generating an invalidity signal when said preselected number of said sample outputs are not the same.
Claim 18
Dependent Claim
59 words
A data-sensing verification system as claimed in claim 15, wherein said sampling means includes a pair of said second storage means, and comparison means responsive to the sampling outputs of said pair of second storage means for generating a validity signal when said sample outputs are the same and generating an invalidity signal when said sample outputs are different.
Claim 19
Dependent Claim
48 words
A data-sensing verification system as claimed in claim 15 including signal differentiator means responsive to said control signal for generating first control impulses corresponding to the leading edge of each control mark, and for generating a second control impulse corresponding to the trailing edge of each controL mark.
Claim 20
Dependent Claim
44 words
A data-sensing verification system as claimed in claim 18 wherein said first data storage means is responsive to each second control impulse applied thereto in the absence of a first modified data signal for generating an output corresponding to said second modified data signal.
Claim 21
Dependent Claim
76 words
A data-sensing verification system as claimed in claim 19, in which said second storage means comprises a plurality gated storage flip flops each having a first input connected to the output of said first storage means, and a second input each of said gated flip flops being responsive to a pulse applied to its second input to store the value of the signal applied to its first input and to produce a sample output corresponding thereto.
Claim 22
Independent Claim
146 words
A method for indicating the validity of a signal representative of data contained in a marking location on a document having a plurality of control marks associated with said marking location, said data taking the form of the presence or absence of a mark in said marking location, comprising the steps of: sensing data in said marking location; generating a signal representative of the data sensed which varies in value as a function of variations in the form of said data; sensing each of said control marks; generating a plurality of control signals, one in response to the sensing of each of said control marks; generating a plurality of said data signal, one in response to each of said control signals; and generating an output indicative of the validity of said data signal as a function of the existence of a selected relationship between said samples.
Claim 23
Independent Claim
146 words
A method for indicating the validity of a signal representative of data contained in a marking location on a document having a plurality of control marks associated with said marking location, said data taking the form of the presence or absence of a mark in said marking location, comprising the steps of: sensing data in said marking location; generating a signal representative of the data sensed which varies in value as a function of variations in the form of said data; sensing each of said control marks; generating a plurality of control signals, one in response to the sensing of each of said control marks; generating a plurality of said data signal, one in response to each of said control signals; and generating an output indicative of the validity of said data signal as a function of the existence of a selected relationship between said samples.
Claim 24
Dependent Claim
44 words
A method as claimed in claim 21, in which each of said plurality of control marks is associated with respective portions of said marking location, including the step of sensing each of said control marks and the portion of the marking location corresponding thereto.
Claim 25
Dependent Claim
45 words
A method as claimed in claim 22, in which each of said control signals defines a time interval associated with said portions of said location, and including the step of storing each of the sampled data signals in response to each of said control signals.
Claim 26
Dependent Claim
41 words
A method as claimed in claim 23, including the steps of comparing the stored sampled data signals to determine the relationship therebetween, and generating said validity indicating output as a function of said selected relationship between said stored sampled data signals.
Claim 27
Dependent Claim
32 words
A method as claimed in claim 21 including the step of differentiating each of said control signals to produce control impulses corresponding to the leading and trailing edges of each control mark.
Claim 28
Dependent Claim
53 words
A method as claimed in claim 25 including the steps of generating a data output having a first value when said data signal is less than a threshold value and having a second value when said data signal exceeds said threshold value during the time interval prior to each trailing edge control impulse.
Claim 29
Dependent Claim
39 words
A method as claimed in claim 26 including the steps of sampling said data output in response to each leading edge control impulse, and separately storing each of said sampled data outputs and comparing said stored sampled data outputs.
Claim 30
Dependent Claim
63 words
A method as claimed in claim 27 including the step of generating an indicating output in response to the last trailing edge control impulse indicative of the validity of said data signal as a function of a preselected relationship between said stored sampled data outputs and indicative of the invalidity of said data signal as a function of the absence of said relationship.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |