×

Watchman's tour recording system

  • US 3,922,649 A
  • Filed: 09/10/1974
  • Issued: 11/25/1975
  • Est. Priority Date: 09/10/1974
  • Status: Expired due to Term
First Claim
Patent Images

1. A watchman'"'"''"'"'s unit for recording the checking of stations by a watchman, said unit comprising, memory means having a plurality of locations therein for storing signals applied thereto, clock means for generating time signals corresponding to elapsed time following an applied reset signal, station detector means for producing station signals corresponding to the identity of a station upon connection of the unit to a station being checked, and address means operative in response to the production of station signals to direct the time signals being generated to a particular location in said memory means, whereby each location in said memory means which receives a time signal corresponds to the particular station which was being checked during the occurence of said time signal.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×