Patent Yard Sign in
Expired Canadian patentCanada

Electrical thermostat control apparatus

CA 1109946 A · Owner: Honeywell Inc. · Inventors: Nelson, Marvin D.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

A thermostat adapted for use in an electrical control system for controlling temperature conditioning apparatus has at least two circuit adjusting members or potentiometers comprising a resistance circuit board mounted on a base and a pair of pivotally mounted wiper supporting members members for cooperating with the resistance circuit. Each of the members are pivoted on the same pivot and the first member has an open area through which the wiper of the second member mounted adjacent thereto protrudes to cooperate with the electrical circuit board to provide a compact unit. A pair of adjacent members are horizontally movably attached to the base to cooperative with the ends of the pivotal …

Read the whole patent

Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted September 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 29, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 16, 1978
GrantedSeptember 29, 1981
Term endedSeptember 29, 1998
Patent numberCA 1109946 A
Classification (IPC)G05D23/00 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedMay 16, 1978Patent grantedSep 29, 1981Term endedSep 29, 1998

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.