Differential temperature control
Description
FIG. 1 is a front and top-left perspective view of a differential temperature control showing my new design;
FIG. 2 is a left side elevational view thereof, the right side being a mirror image thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a bottom plan view thereof.
Referenced Cited
U.S. Patent Documents
Other references
| D76275 | September 1928 | Wilms |
| D184309 | January 1959 | Ernst |
| D218780 | September 1970 | Vetter |
| D246442 | November 22, 1977 | Aupperle |
| D250635 | December 26, 1978 | Carlson |
| D257959 | January 20, 1981 | Chin |
| D258805 | April 7, 1981 | Schwartz |
| D264189 | May 4, 1982 | Crawford |
| 2977433 | March 28, 1961 | Beiser |
| 3090192 | May 1963 | Kraft |
| 4316256 | February 16, 1982 | Hendricks |
- Centralab Cat. ELC-Z-1/14/77-p.3-Switch Assembly at bottom.
Patent History
Patent number: D274043
Type: Grant
Filed: Mar 16, 1982
Date of Patent: May 29, 1984
Inventor: Larry W. Paine (Evergreen, CO)
Primary Examiner: Nelson C. Holtje
Application Number: 6/408,112
Type: Grant
Filed: Mar 16, 1982
Date of Patent: May 29, 1984
Inventor: Larry W. Paine (Evergreen, CO)
Primary Examiner: Nelson C. Holtje
Application Number: 6/408,112
Classifications
Current U.S. Class:
Temperature Regulator Or Thermostat (D10/50)
