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公开(公告)号：CA1162228A
公开(公告)日：1984-02-14
申请号：CA352830
申请日：1980-05-27
Applicant: IBM
Inventor： CUNNINGHAM EARL A , CUTSHALL DAVID E , HEILING GERALD M , SODERSTROM RONALD L , THOMPSON JAMES M
Abstract: A driver circuit for a thermal printing element varies the power applied to the element, depending upon its recent history of energization, in order to maintain uniform print density desprite temperature variation in the element. A capacitor charges and discharges to measure time intervals since the last element energization to control the voltage applied by an output transistor.
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公开(公告)号：CA2032209C
公开(公告)日：1994-01-18
申请号：CA2032209
申请日：1990-12-13
Applicant: IBM
Inventor： HEILING GERALD M , KNODEL DAVID A , PETERSON MICHAEL J , SCHUELKE BRIAN A , SILJENBERG DAVID W , SODERSTROM RONALD L , TRNKA JOHN T
Abstract: A fully redundant safety interlock system is provided comprising, means for detecting the loss of light on a fiber optic link; controller means, coupled to said means for detecting, for determining the safety condition of the link based on the output of said means for detecting, and for controlling the radiant energy output of an optical transmitter, based on the determined safety condition, via redundant output control signals; and means, coupled to said controller means, responsive to said redundant control signals, for interconnecting the output of said controller means to transmitter drive circuitry to thereby adjust the radiant energy output by the transmitter. According to a preferred embodiment of the invention, the controller means includes an electronic implementation of two independent state machines, each of which redundantly determines the connection state of the optical link between two optical link cards. The output from the state machines is used to adjust (for example, turn on and turn off) the drive circuitry for the transmitter via fully redundant paths which carry the redundant control signals.
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公开(公告)号：CA2032209A1
公开(公告)日：1991-07-10
申请号：CA2032209
申请日：1990-12-13
Applicant: IBM
Inventor： HEILING GERALD M , KNODEL DAVID A , PETERSON MICHAEL J , SCHUELKE BRIAN A , SILJENBERG DAVID W , SODERSTROM RONALD L , TRNKA JOHN T
Abstract: A fully redundant safety interlock system is provided comprising, means for detecting the loss of light on a fiber optic link; controller means, coupled to said means for detecting, for determining the safety condition of the link based on the output of said means for detecting, and for controlling the radiant energy output of an optical transmitter, based on the determined safety condition, via redundant output control signals; and means, coupled to said controller means, responsive to said redundant control signals, for interconnecting the output of said controller means to transmitter drive circuitry to thereby adjust the radiant energy output by the transmitter. According to a preferred embodiment of the invention, the controller means includes an electronic implementation of two independent state machines, each of which redundantly determines the connection state of the optical link between two optical link cards. The output from the state machines is used to adjust (for example, turn on and turn off) the drive circuitry for the transmitter via fully redundant paths which carry the redundant control signals.
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Patent Agency Ranking
公开(公告)号：BR9100035A
公开(公告)日：1991-10-22
申请号：BR9100035
申请日：1991-01-07
Applicant: IBM
Inventor： HEILING GERALD M , KNODEL DAVID A , PETERSON MICHAEL J , SCHUELKE BRIAN A , SILJENBERG DAVID W , SODERSTROM RONALD L , TRNKA JOHN T
Abstract: A fully redundant safety interlock system is provided comprising, means for detecting the loss of light on a fiber optic link; controller means, coupled to said means for detecting, for determining the safety condition of the link based on the output of said means for detecting, and for controlling the radiant energy output of an optical transmitter, based on the determined safety condition, via redundant output control signals; and means, coupled to said controller means, responsive to said redundant control signals, for interconnecting the output of said controller means to transmitter drive circuitry to thereby adjust the radiant energy output by the transmitter. According to a preferred embodiment of the invention, the controller means includes an electronic implementation of two independent state machines, each of which redundantly determines the connection state of the optical link between two optical link cards. The output from the state machines is used to adjust (for example, turn on and turn off) the drive circuitry for the transmitter via fully redundant paths which carry the redundant control signals.
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公开(公告)号：CA1131692A
公开(公告)日：1982-09-14
申请号：CA334069
申请日：1979-08-20
Applicant: IBM
Inventor： HARDING ROBERT F , HEILING GERALD M , HOLTER SPENCER C , SODERSTROM RONALD L
Abstract: IMPROVED SILICON THERMAL PRINTHEAD FOR ON-THE-FLY PRINTING On-the-fly thermal print definition and thermal printing speed are enhanced using a rectangular print mesa for thermal printing with the narrow dimension in the direction of relative motion between print element and print medium and using longer electrical pulses having an amplitude which drives the print element temperature only slighly above the transition temperature of the thermographic print medium. R0977-0166
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公开(公告)号：CA1118275A
公开(公告)日：1982-02-16
申请号：CA337630
申请日：1979-10-15
Applicant: IBM
Inventor： HEILING GERALD M , KNAPPE LAVERNE F , REGEHR JOHN L
IPC: B41J2/32 , B41J25/304 , B41J29/02 , B41M5/26
Abstract: THERMAL PRINTER WRITE HEAD ASSEMBLY A non-impact thermal printer is formed using a pivoted stiffner-frame on which is mounted a printed circuit card-print head assembly. The card is slotted with the print heads mounted at the distal ends of the cantilevered portions to enable close compliance between print head read/write units and the print media through the torsional resilience of the circuit card cantilevered portions. Compact, simple structure is provided by having the printer control circuitry mounted on the same printed circuit card. RO977-021
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公开(公告)号：CA1075052A
公开(公告)日：1980-04-08
申请号：CA273412
申请日：1977-03-08
Applicant: IBM
Inventor： HEILING GERALD M
Abstract: STRAIGHT-LINE OPTICAL SCANNER USING ROTATING HOLOGRAMS A flat disk contains a number of holograms made from the interference of a plane wavefront with spherical wavefront modified by a first cylindrical lens. The disk is rotated so that a plane reconstruction wavefront sweeps across the holograms. The resulting reconstructed wavefront is passed through a second cylindrical lens, resulting in a focussed point sweeping across an object plane in one or more straight lines.
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