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Floor treating machines

  • US 4,114,711 A
  • Filed: 09/16/1977
  • Issued: 09/19/1978
  • Est. Priority Date: 01/10/1975
  • Status: Expired due to Term
First Claim
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1. In a floor treating machine comprising laterally spaced drive wheels, separate traction motors drivably connected to the wheels and electronic control means to provide separate trains of pulses to operate the motors conjointly for straight line motion and differentially for steering motion, means for recording the trains of pulses to the traction motors for recording the path followed by the machine and means for replaying the record to reproduce the trains of pulses which are fed to the motors whereby the machine will reproduce the original path followed by the machine:

  • the improvement of a distance check device for comparing the distance run in operation with the distance run during replaying of the record to see if path discrepancies exist, and overrider control means responsive to the output of the distance check comparison to sense a lag or lead and correspondingly increase or decrease the power fed to the motors to effect speed correction that will correct the path discrepancy.

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