Programmable electronic thermostat

• US 4,308,991 A
• Filed: 07/07/1980
• Issued: 01/05/1982
• Est. Priority Date: 07/07/1980
• Status: Expired due to Term

• Current Assignee: Emerson Electric Company
• Original Assignee: Emerson Electric Company
• Inventors: Rippelmeyer, Dennis M., Peinetti, Donald L.
• Primary Examiner(s): Wayner, William E.
• Application Number:
  US06/166,748
• Time in Patent Office: 547 Days
• Field of Search: 236/46 R, 236/47, 236/51, 236/94, 165/12, 165/11, 364/104, 340/309.4
• US Class Current: 236/46.00R
• CPC Class Codes: F23N 2223/08 Microprocessor; Microcomputer
• CPC Class Codes: F23N 2237/06 two predeterming temperatures, e.g. day-night
• CPC Class Codes: F23N 5/203 using electronic means
• CPC Class Codes: G05D 23/1904 variable in time

Abstract

A space thermostat for controlling temperature at different levels during different time periods includes a programmable microprocessor which has been pre-programmed to provide a plurality of chronologically annunciated displays. Each display contains a time and temperature within a specific time range. A multi-segment keyboard is provided to enable the homeowner to set the correct clock time and day of the week, to recall each display, and to change, if necessary, the time and temperature of each display so as to establish a desired seven-day time-temperature schedule.

Claims

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.

2. The method claimed in claim 1 wherein said changing of said starting times, set-point temperatures, clock time in minutes, clock time in hours, and day of the week is accomplished by rolling the values thereof, said rolling occurring at a predetermined rated.