Patent US3857022A successfully refreshed from Google Patents.
US3857022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graphic input device
Assignee: INTEGRATED SCIENCES CORP
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Filing: 1973-11-15
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Granted: 1974-12-24
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Expires: 1993-11-15
Abstract
Abstract An interface device is provided comprising a screen made of a material such as plastic or glass whereby the two dimensional coordinates of the location at which the screen is tapped, by an object, such as a stylus, is obtained in the form of representative electrical signals, which may be supplied to a data processing machine.
Inventors
- 👤 G Rebane
- 👤 N Grossman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:16
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/043; G06F3/0433; G01; G01S; G01S5/00; G01S5/18; G01S5/30; Y; Y10; Y10S; Y10S367/00; Y10S367/907
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
269 words
A system for generating signals, respectively X0, Y0, which are representative of the locus of a point from which sound originates on a rectangular screen, relative to an origin point, comprising first, second and third transducer means, positioned along first, second and third sides of said screen for generating first, second and third signals in response to the sound from said sound originating locus being received by said respective first, second and third transducer means through the material of said screen, means responsive to the difference between the time of generating said first and second signals to generate a fourth signal representative thereof, means responsive to the difference in the time of generating said second and third signals to generate a fifth signal representative thereof, means for generating a quantity representative of the velocity of sound through said screen divided by two, means for multiplying said fourth signal by said quantity representative of the velocity of sound through said screen divided by two to produce a sixth signal representative thereof, means for multiplying said fifth signal by said quantity representative of the velocity of sound through said screen divided by two to produce a seventh signal representative thereof, means for generating an eighth signal representative of the length of one side of said screen divided by two, means for adding said sixth, seventh and eighth signals to produce a resultant signal equal to X0, means for subtracting said sixth signal from said seventh signal to produce a resultant signal, and means for adding said eighth signal to said last named resultant signal to produce a signal representative of Y0.
Claim 2
Independent Claim
269 words
A system for generating signals, respectively X0, Y0, which are representative of the locus of a point from which sound originates on a rectangular screen, relative to an origin point, comprising first, second and third transducer means, positioned along first, second and third sides of said screen for generating first, second and third signals in response to the sound from said sound originating locus being received by said respective first, second and third transducer means through the material of said screen, means responsive to the difference between the time of generating said first and second signals to generate a fourth signal representative thereof, means responsive to the difference in the time of generating said second and third signals to generate a fifth signal representative thereof, means for generating a quantity representative of the velocity of sound through said screen divided by two, means for multiplying said fourth signal by said quantity representative of the velocity of sound through said screen divided by two to produce a sixth signal representative thereof, means for multiplying said fifth signal by said quantity representative of the velocity of sound through said screen divided by two to produce a seventh signal representative thereof, means for generating an eighth signal representative of the length of one side of said screen divided by two, means for adding said sixth, seventh and eighth signals to produce a resultant signal equal to X0, means for subtracting said sixth signal from said seventh signal to produce a resultant signal, and means for adding said eighth signal to said last named resultant signal to produce a signal representative of Y0.
Claim 3
Dependent Claim
214 words
A system as recited in claim 1 wherein said means to generate a fourth signal and said means to generate a fifth signal comprise a first and a second up-down counter, a source of clock pulses, means for applying clock pulses from said source to said first and second counters to be counted when said counters are enabled to count, means responsive to said first signal being generated before said second signal is generated to enable said first counter to count up, means responsive to said second signal being generated before said first signal is generated to enable said first counter to count down, means responsive to said second signal being generated before said third signal is generated to enable said second counter to count up, means responsive to said third signal being generated before said second signal to enable said second counter to count down, means responsive to the enabling of said second counter to commence counting to terminate the count of said first counter, whereby the count in said first counter is a digital representation of said fourth signal, and means responsive to the generation of said third signal to terminate the count of said second counter, whereby the count of said second counter is a digital representation of said fifth signal.
Claim 4
Dependent Claim
286 words
A system as recited in claim 2 wherein said means responsive to said first signal being generated before said second signal is generated to enable said first counter to count up, means responsive to said second signal being generated before said first signal is generated to enable said fiRst counter to count down, means responsive to said second signal being generated before said first signal is generated to enable said second counter to count up, means responsive to said third signal being generated before said second signal to enable said second counter to count down, includes a first, second and third flip flop, each having set and reset outputs, first gate means responsive to the set output of said first flip flop and the reset output of said second flip flop to enable said first counter to count up, second gate means responsive to the reset output of said first flip flop and the set output of said second flip flop to enable said first counter to count down, third gate means responsive to the set output of said second flip flop the reset output of said third flip flop to enable said second counter to count up, fourth gate means responsive to the reset output of said second flip flop and the set output of said third flip flop to enable said second counter to count down, means to apply said first signal to said first flip flop to cause it to produce a set output, means to apply said second signal to said second flip flop to cause it to produce a set output, and means to apply said third signal to said third flip flop to cause it to produce a set output.
Claim 5
Dependent Claim
47 words
A system as recited in claim 3 wherein there is included means responsive to the first occurrence of a set output from any one of said first, second and third flip flops to generate a clear signal which clears the counts from said first and second counters.
Claim 6
Dependent Claim
35 words
A system as recited in claim 3 wherein there is included means for maintaining said first, second and third flip flop means unresponsive to any additional first, second and third signals over a predetermined interval.
Claim 7
Independent Claim
195 words
A method for generating signals, respectively X0, Y0, which are representative of the locus of a point from which sound originates on a rectangular screen, relative to an origin point, comprising generating a first signal representative of the difference in the time of arrival of sound through said screen from said sound originating point at a first and second side of said screen, generating a second signal representative of the difference in the time of arrival of sound through said screen from said sound originating point at said second and a third side of said screen, generating a third signal representative of the velocity of sound through said screen divided by two, multiplying said first signal by said third signal to produce a fourth signal, multiplying said second signal by said third signal to produce a fifth signal, generating a sixth signal representative of the length of one side of said screen divided by two, adding said fourth, fifth and sixth signals to produce a signal representative of X0, subtracting said fourth from said fifth signal to produce a seventh signal, and adding said sixth and seventh signals to produce a signal representative of Y0.
Claim 8
Independent Claim
195 words
A method for generating signals, respectively X0, Y0, which are representative of the locus of a point from which sound originates on a rectangular screen, relative to an origin point, comprising generating a first signal representative of the difference in the time of arrival of sound through said screen from said sound originating point at a first and second side of said screen, generating a second signal representative of the difference in the time of arrival of sound through said screen from said sound originating point at said second and a third side of said screen, generating a third signal representative of the velocity of sound through said screen divided by two, multiplying said first signal by said third signal to produce a fourth signal, multiplying said second signal by said third signal to produce a fifth signal, generating a sixth signal representative of the length of one side of said screen divided by two, adding said fourth, fifth and sixth signals to produce a signal representative of X0, subtracting said fourth from said fifth signal to produce a seventh signal, and adding said sixth and seventh signals to produce a signal representative of Y0.
Claim 9
Dependent Claim
159 words
A method for generating signals, respectively, X0, Y0, which are representative of the locus of a point from which sound originates in a rectangular screen, relative to an origin point, as recited in claim 6 wherein said step of generating a first signal includes generating a first side signal in response to the arrival of sound at said first side through said screen from said sound originating point, generating a second side signal in response to the arrival of sound at said second side through said screen from said sound originating point, generating a third side signal in response to the arrival of sound at said third side through said screen from said sound originating point, measuring the interval between the generation of said first side and second side signals and producing a first signal representative thereof, and measuring the interval between the generation of said second side and third side siGnals and producing a second signal representative thereof.
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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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |