Programmable electronic thermostat

Claim 1

An improved method for programming a programmable electronic thermostat having pre-programmed time and temperature data stored therein including starting times and set-point temperatures for a plurality of chronologically arranged time periods, comprising the steps of: (a) displaying on display means the stored starting time and set-point temperature for a first of the plurality of chronologically arranged time periods; (b) changing forwardly or backwardly said displayed starting time, if different from a desired starting time, to establish said desired starting time for said first time period; (c) raising or lowering said displayed set-point temperature, if different from a desired set-point temperature, to establish said desired set-point temperature for said first time period; (d) displaying on said display means the stored starting times and set point temperatures of each subsequent time period of said plurality of chronologically arranged time periods and repeating steps (b) and (c) of this claim to establish a desired starting time and set-point temperature for each subsequent time period; (e) displaying clock time in minutes on said display means; (f) changing forwardly or backwardly said displayed clock time in minutes, if different from the correct clock time in minutes, to establish said correct clock time in minutes; (g) displaying clock time in hours on said display means; (h) changing forwardly or backwardly said displayed clock time in hours, if different from the correct clock time in hours, to establish said correct clock time in hours; (i) displaying a designation of the day of the week; (j) changing forwardly or backwardly said displayed day of the week, if different from the correct day of the week, to establish said correct day of the week; and (k) placing the thermostat in an operative mode.