×

ACOUSTICALLY ACTIVATED PROXIMITY SENSOR SWITCH

  • US 3,863,196 A
  • Filed: 01/31/1972
  • Issued: 01/28/1975
  • Est. Priority Date: 01/31/1972
  • Status: Expired due to Term
First Claim
Patent Images

1. A sonically operated urinal flushing system comprising means for sonically detecting a sonic energy reflecting target in a predetermined zone, means for measuring a predetermined time period after said detection of said target in said zone, means for detecting the removal of said target from said zone, and means responsive jointly to said detection of the removal of said sonic energy reflecting target from said predetermined zone and to said time measuring means for flushing said system after said target has been in said zone for said predetermined time period.

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