Patents by Inventor Harold D. Arnold

Harold D. Arnold 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).

  • Patent number: 4258368
    Abstract: A safety device for preventing the automatic restart of a motor upon restoration of power to the motor. This device, in its preferred embodiment, includes a thyristor switch, such as a triac, in one of the power leads to the motor which is triggered by energizaton of the motor. Upon deenergizaton of the motor, the thyristor switch switches to its non-conductive state thereby preventing automatic restarting of the motor upon restoration of the power. A selectively actuable, momentary run switch is provided to momentarily shunt out the thyristor switch so as to selectively permit the restart of the motor.
    Type: Grant
    Filed: March 29, 1979
    Date of Patent: March 24, 1981
    Assignee: Emerson Electric Co.
    Inventors: Harold D. Arnold, Edward A. Kitsch
  • Patent number: 4250417
    Abstract: An air deflector mountable within an electric motor adjacent the outer periphery of a cooling fan within the motor and adjacent the stator winding end turns of the motor so as to inhibit circular flow of air within the motor and to ensure axial flow of air through the motor. In a first embodiment of the air deflector of this invention, the deflector is mounted on the stator through-bolts extending axially from the stator core of the motor, the through-bolts holding the end shields in place on the motor shell. In another embodiment of this invention, the deflectors are forceably inserted in the stator winding end turns and are held in place by the end turns and by the motor shell and are held captive between the stator core and a motor end shield.
    Type: Grant
    Filed: December 21, 1978
    Date of Patent: February 10, 1981
    Assignee: Emerson Electric Co.
    Inventor: Harold D. Arnold