Patents by Inventor Bernd Rojahn

Bernd Rojahn 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: 4296702
    Abstract: An electric sewing machine comprises a casing with an electric drive motor mounted in the casing. The casing includes a recess defined in the base portion which opens on one end and receives a control member which fits in the recess. The control member carries a control for regulating the speed of the motor which includes a foot-pedal switch for operating a variable resistance to change the motor speed. The control member includes a reel over which a connecting cable is wound and which extends between the control in the housing of the control member through the casing to the motor. A winding mechanism permits the control member to be removed from the recess of the casing by permitting the unwinding of the cable without disconnecting it from the control. The winding mechanism includes a reel which is unwound with the cable and a spring for returning the reel when the cable is to be rewound for replacement of the control into the housing.
    Type: Grant
    Filed: March 19, 1979
    Date of Patent: October 27, 1981
    Assignee: Dorina Nahmaschinen GmbH
    Inventors: Willi Meier, Bernd Rojahn