US3342935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free stylus position locating system
Assignee: AMF Inc
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Filing: 1964-01-20
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Granted: 1967-09-19
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Expires: 1984-01-20
Abstract
No abstract record available.
Inventors
- 👤 Leifer Joseph Charles
- 👤 Jr Louis Mittelman
- 👤 Sobol Erwin Julius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:21
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/044; G06F3/0442; G06F3/0443
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
223 words
A SYSTEM FOR LOCATING THE POSITION OF A STYLUS AS DEFINED IN TERMS OF A COORDINATE, DISTANCES ALONG WHICH ARE REPRESENTED BY A FAMILY OF SPACED COORDINATE CONDUCTORS COMPRISING: (A) MEANS FOR SEQUENTIALLY APPLYING AN IDENTIFYING WAVE TO EACH CONDUCTOR AND FOR CONCURRENTLY GENERATING A FIRST VOLTAGE WAVEFORM OF CHANGING LEVEL; (B) MEANS FOR PICKING UP ONE OF SAID WAVES IN THE STYLUS FROM AN ADJACENT CONDUCTOR; (C) MEANS OPERATED BY SAID PICKING UP MEANS FOR STORING THE LEVEL OF THE FIRST WAVEFORM AT THE INSTANT WHEN THE WAVE WAS PICKED UP; (D) MEANS FOR GENERATING AND APPLYING PLURAL PHASESHIFTED COMPONENTS OF A CYCLIC WAVE IN A REPEATING SEQUENCE TO PLURAL CONDUCTORS IN REPEATING GROUPS AND FOR CONCURRENTLY GENERATING A SECOND WAVEFORM CHANGING IN LEVEL AND INITIATED AT THE TIME THE CYCLIC WAVE PASSES THROUGH A DEFINITE POINT IN ITS CYCLE; (E) MEANS FOR PICKING UP A COMPOSITE OF THE PHASE SHIFTED COMPONENTS AT THE STYLUS AND DETERMINING THE INSTANT AT WHICH THE COMPOSITE PASSES THROUGH A SIMILAR DEFINITE POINT IN ITS CYCLE; (F) MEANS OPERATED BY THE LATTER PICKING UP MEANS FOR STORING THE LEVEL OF THE SECOND WAVEFORM AT THE LATTER INSTANT; AND (G) MEANS FOR COMBINING THE TWO STORED LEVELS TO PRODUCE AN OUTPUT LEVEL PROPORTIONAL TO SAID STORED LEVELS AND REPRESENTING THE POSITION OF THE STYLUS ALONG THAT COORDINATE.
Claim 2
Independent Claim
223 words
A SYSTEM FOR LOCATING THE POSITION OF A STYLUS AS DEFINED IN TERMS OF A COORDINATE, DISTANCES ALONG WHICH ARE REPRESENTED BY A FAMILY OF SPACED COORDINATE CONDUCTORS COMPRISING: (A) MEANS FOR SEQUENTIALLY APPLYING AN IDENTIFYING WAVE TO EACH CONDUCTOR AND FOR CONCURRENTLY GENERATING A FIRST VOLTAGE WAVEFORM OF CHANGING LEVEL; (B) MEANS FOR PICKING UP ONE OF SAID WAVES IN THE STYLUS FROM AN ADJACENT CONDUCTOR; (C) MEANS OPERATED BY SAID PICKING UP MEANS FOR STORING THE LEVEL OF THE FIRST WAVEFORM AT THE INSTANT WHEN THE WAVE WAS PICKED UP; (D) MEANS FOR GENERATING AND APPLYING PLURAL PHASESHIFTED COMPONENTS OF A CYCLIC WAVE IN A REPEATING SEQUENCE TO PLURAL CONDUCTORS IN REPEATING GROUPS AND FOR CONCURRENTLY GENERATING A SECOND WAVEFORM CHANGING IN LEVEL AND INITIATED AT THE TIME THE CYCLIC WAVE PASSES THROUGH A DEFINITE POINT IN ITS CYCLE; (E) MEANS FOR PICKING UP A COMPOSITE OF THE PHASE SHIFTED COMPONENTS AT THE STYLUS AND DETERMINING THE INSTANT AT WHICH THE COMPOSITE PASSES THROUGH A SIMILAR DEFINITE POINT IN ITS CYCLE; (F) MEANS OPERATED BY THE LATTER PICKING UP MEANS FOR STORING THE LEVEL OF THE SECOND WAVEFORM AT THE LATTER INSTANT; AND (G) MEANS FOR COMBINING THE TWO STORED LEVELS TO PRODUCE AN OUTPUT LEVEL PROPORTIONAL TO SAID STORED LEVELS AND REPRESENTING THE POSITION OF THE STYLUS ALONG THAT COORDINATE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |