US 12,359,809 B2
Back lit temperature knob
James E. Pearson, Itasca, IL (US); and Timothy M. Wright, Itasca, IL (US)
Assigned to Robertshaw Controls Company, Itasca, IL (US)
Filed by James E. Pearson, Itasca, IL (US); and Timothy M. Wright, Itasca, IL (US)
Filed on Jun. 9, 2022, as Appl. No. 17/836,085.
Claims priority of provisional application 63/209,455, filed on Jun. 11, 2021.
Prior Publication US 2022/0397273 A1, Dec. 15, 2022
Int. Cl. F23N 1/08 (2006.01); F21V 33/00 (2006.01); F24H 9/20 (2022.01); G05G 1/10 (2006.01)
CPC F23N 1/087 (2013.01) [F21V 33/006 (2013.01); F24H 9/20 (2013.01); F24H 9/2035 (2013.01); G05G 1/105 (2013.01); F23N 2225/08 (2020.01); F24H 9/2007 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A water heater lighted temperature adjustment valve and gas water heater combination comprising:
ras water heater having one of a thermocouple and a thermopile normally providing power to a safety magnet, said as water heater not connected to an external electrical source,
a manual control knob having temperature indications displayed on a front face of the knob, said manual control knob extending from a front of a valve cover;
one of a cutout, a transparent portion, and a translucent portion permitting at least some light to pass through the knob from behind to at least selectively illuminate at least a portion of the temperature indications;
a light source selectively directing light through the knob, said one of the thermocouple and thermopile also serving as an electrical power source for the light source; and
an activator, wherein upon activation, the light source at least temporarily provides light thereby illuminating the at least a portion of the temperature indications.