Patents by Inventor Alexander D. R. Walker

Alexander D. R. Walker has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Integral revolution clutch
    Patent number: 4036067
    Abstract: An integral revolution clutch is provided wherein a motor rotates a drive pulley which continuously drives an idler pulley through a belt. A drive shaft is provided with a segment of a circle thereon connectable to the idler pulley by means of the belt. A spring means urges the segment into contact with the belt and a stop means normally prevents contact. When the stop means is deactivated, the segment is drawn between the belt and the pulley, causing the shaft on which the segment is located to make an integral number of revolutions until the stop means is restored. In a similar manner, power can be taken directly from the drive pulley.
    Type: Grant
    Filed: September 8, 1975
    Date of Patent: July 19, 1977
    Assignee: N-Dimensions, Inc.
    Inventor: Alexander D. R. Walker
  • Computer terminal
    Patent number: 4030587
    Abstract: A computer terminal including a printer including a heat sensitive sheet across which a thermal head having a vertical column of resistors can move with appropriate electrical energization controlled by a keyboard to effect character printing on the sheet, and also to generate a coded output for transmission to and from a computer at a central station.
    Type: Grant
    Filed: December 8, 1975
    Date of Patent: June 21, 1977
    Inventor: Alexander D. R. Walker
  • General purpose calculator having keys with more than one function assigned thereto
    Patent number: 3955074
    Abstract: A battery-powered, hand-held calculator employs MOS/LSI calculator circuits to perform arithmetic and financial calculations. Data and commands are input to the calculator from a keyboard having a prefix key to double the functions of selected keys. A 15-digit, seven-segment light emitting diode (LED) display serves as the output for the calculator.
    Type: Grant
    Filed: October 10, 1974
    Date of Patent: May 4, 1976
    Assignee: Hewlett-Packard Company
    Inventors: France Rode, William L. Crowley, Jr., Alexander D. R. Walker
  • General purpose calculator with capability for performing yield-to-maturity of a bond calculation
    Patent number: 3946218
    Abstract: A battery-powered, hand-held, calculator employs MOS/LSI calculator circuits to perform arithmetic and financial calculations. Data and commands are input to the calculator from a keyboard having shift key to double the functions of selected keys. A 15-digit, seven-segment light emitting diode (LED) display serves as the output for the calculator. The calculator circuits include a read-only memory circuit in which the algorithms for performing the arithmetic and financial calculations are stored; a control and timing circuit for scanning the keyboard, retaining status information about the condition of the calculator or of an algorithm, and generating the next read-only memory address; and an arithmetic and register circuit containing an adder, a group of working registers, a group of data storage registers forming a stack for roll down operation, and a constant storage register. These circuits are interconnected by a multiple line buss system.
    Type: Grant
    Filed: October 10, 1974
    Date of Patent: March 23, 1976
    Assignee: Hewlett-Packard Company
    Inventors: France Rode, William L. Crowley, Jr., Alexander D. R. Walker, David S. Cochran
  • Single key stroke instant programming controller
    Patent number: D280406
    Type: Grant
    Filed: September 13, 1982
    Date of Patent: September 3, 1985
    Assignee: Dyna Electronics, Inc.
    Inventor: Alexander D. R. Walker