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US3656172A Expired / Lapsed US ⏱️ 0.0 years remaining

Impression sensing

Assignee: ATHENA SYSTEMS Inc
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Filing: 1970-04-27
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Granted: 1972-04-11
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Expires: 1990-04-27
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Abstract

Abstract Embossed OCR characters are sensed and converted into representative seven-bit words on magnetic tape with a timing bit recorded adjacent to each of the seven information bit positions. There are seven feeler pins each centered in a respective one of the four vertical and three horizontal segments that form a rectangular figure-of-eight. Associated with each pin is a narrow edge of low reluctance magnetic material that is urged away from and moved toward magnetic tape in response to the presence and absence, respectively, of a segment in an embossed character being sensed. The magnetic tape is backed by a pole of a permanent magnet, the other pole being magnetically coupled to the sensing elements so that the magnetic flux path is through a narrow edge and the tape. When the narrow edge is close to the tape, the magnetic field strength is sufficient to change the state of that small portion of the magnetic tape opposite the narrow edge to record there a binary one. When the narrow edge is away, the state of the magnetic tape opposite the narrow edge remains unchanged to record a binary zero. Adjacent to each movable narrow edge is a fixed sharp edge that records a one as a timing signal. In this manner the invention senses an embossed array of characters and converts them to a corresponding array of binarily encoded digital data on a magnetic tape that may then be electronically processed with computers or other utilization apparatus.

Inventors

  • 👤 Robert E Wiltz
  • 👤 Edmund D Schreiner
  • 👤 Malcolm C Winsor

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 18:58
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/04

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 131 words
Apparatus for sensing embossed characters comprising, a plurality of pin means located in a character sensing area each of which assumes one of first and second positions representative of the character embossing in the sensing area, and means for detecting the positions of said pin means to provide a binary encoded representation of the character in the sensing area thus sensed, said means for detecting comprising tape means for recording first and second signals in sequence representative of the positions assumed by said pin means, and a corresponding plurality of writing elements mechanically linked to a respective one of said pin means movable between a first position close to said tape and a second position away from said tape to thereby record said first and second positions respectively on said tape.
Claim 2
Dependent Claim 131 words
Apparatus for sensing embossed characters comprising, a plurality of pin means located in a character sensing area each of which assumes one of first and second positions representative of the character embossing in the sensing area, and means for detecting the positions of said pin means to provide a binary encoded representation of the character in the sensing area thus sensed, said means for detecting comprising tape means for recording first and second signals in sequence representative of the positions assumed by said pin means, and a corresponding plurality of writing elements mechanically linked to a respective one of said pin means movable between a first position close to said tape and a second position away from said tape to thereby record said first and second positions respectively on said tape.
Claim 3
Dependent Claim 11 words
Apparatus in accordance with claim 1 wherein said tape is magnetic.
Claim 4
Dependent Claim 60 words
Apparatus in accordance with claim 2 wherein said corresponding plurality of writing elements are, a corresponding plurality of magnetic writing elements mechanically linked to a respective one of said pin means movable between a first position close to said tape and a second position away from said tape to thereby record said first and second positions respectively on said tape.
Claim 5
Dependent Claim 41 words
Apparatus in accordance with claim 3 and further comprising, a corresponding plurality of timing bit writing elements alternating with said first-mentioned writing elements for always writing timing pulses upon said tape to define an information bit cell between adjacent timing pulses.
Claim 6
Dependent Claim 41 words
Apparatus in accordance with claim 4 and further comprising, a source of magnetic flux coupled to said writing elements for changing the state of the portion of said tape opposite a writing element in said first position close to said tape.
Claim 7
Dependent Claim 35 words
Apparatus in accordance with claim 5 and further comprising, a biasing source of magnetic flux close to said tape for establishing a predetermined state on said tape before said tape passes by said writing elements.
Claim 8
Dependent Claim 43 words
Apparatus in accordance with claim 5 wherein each of said writing elements includes a J-shaped portion terminating in a narrow face for confining the magnetic flux delivered through said face to said tape to a narrow portion along the length of said tape.
Claim 9
Dependent Claim 51 words
Apparatus in accordance with claim 7 wherein each of said writing elements includes said J-shaped portion suspended from a sensor arm formed with a spring element having a depending tab and further comprising, shoulder means for supporting said depending tab to normally urge said sensor arm against an associated pin means.
Claim 10
Dependent Claim 43 words
ApparatuS in accordance with claim 3 wherein each of said writing elements includes a J-shaped portion terminating in a narrow face for confining the magnetic flux delivered through said face to said tape to a narrow portion along the length of said tape.
Claim 11
Dependent Claim 51 words
Apparatus in accordance with claim 9 wherein each of said writing elements includes a J-shaped portion suspended from a sensor arm formed with a spring element having a depending tab and further comprising, shoulder means for supporting said depending tab to normally urge said sensor arm against an associated pin means.
Claim 12
Dependent Claim 30 words
Apparatus in accordance with claim 9 and further comprising, a backer plate of low reluctance magnetic material behind said tape for coacting with said narrow faces to confine said flux.

References Cited (Backward Citations)

US3401394A Cited
US3384899A Cited
US3513299A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-04-11 1975-10-11 1976-04-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-04-11 1979-10-11 1980-04-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-04-11 1983-10-11 1984-04-11 $7700.00 Window Closed / Lapsed

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