|
US1851983A
|
|
Burner control
|
|
US1888015A
|
|
Oil burner supply system
|
|
US1866725A
|
|
Oil burner feed mechanism
|
|
US1777533A
|
|
Float-operated valve
|
|
US1881950A
|
|
Thermostatically controlled switch
|
|
US1881949A
|
|
Control for oil burners
|
|
US1727082A
|
|
Float-controlled valve
|
|
US1785787A
|
|
Thermostatically-operated device
|
|
US1675133A
|
|
Liquid-fuel-burning system
|
|
US1606599A
|
|
Automatic time-regulating thermostat
|
|
CA303660A
|
|
Thermostatic control device for oil burners
|
|
CA293606A
|
|
Thermostatically controlled switch
|
|
CA287746A
|
|
Float controlled valve
|
|
CA318107A
|
|
Oil burner supply system
|
|
CA293604A
|
|
Control for oil burners
|
|
CA293605A
|
|
Oil burner control
|
|
CA293607A
|
|
Thermostatic switch
|
|
CA292204A
|
|
Thermostatically operated device
|
|
CA312192A
|
|
Clock operated thermostatic control
|
