Patent ID: 11969127
Assignee: DIAMOND PRODUCTIONS LTD.
Field: Furniture, games (Other fields)
Classification: CPC A  B  G | IPC A  B  G

Claim 10:
11. A floor treating machine comprising:
a. a chassis adapted to be moved along a floor surface;
b. a variable speed motor mounted on the chassis;
c. a controller coupled to the motor and adapted to control the speed of the motor;
d. a drive driven by the variable speed motor, said drive comprising a drive shaft, a driven shaft, and a plate coupled to the driven shaft and extending perpendicular to the driven shaft, the drive shaft, driven shaft and plate adapted to spin together at revolutions per minute corresponding to the speed of the variable speed motor;
e. a plate having a pad of a preselected type attached to a floor facing surface of the plate, said plate having a unique set of keys attached thereto for identifying the type of pad attached to the plate;
f. a slip ring sensor coupled to the driven shaft, adapted to rotate with the driven shaft, and further adapted to send signals to the controller, and
g. plurality of electrodes coupled to the slip ring sensor, each of said electrodes including a separate electrical contact attached to the driven shaft, wherein the keys of the unique set of keys engage the electrical contacts, the slip ring sensor thereby identifies the unique set of keys indicative of the type of pad attached to the plate and send signals to the controller, and the controller adjusts the maximum speed at which the variable speed motor operates based on signals received from the slip ring sensor.