Liquid level responsive control device
OwnerFredrick L. Lefebvreinventor
Life of this patent
Estimating the term…
Abstract
There is disclosed liquid level responsive control means for use with heating means for liquid in tanks comprising a control unit, main power supply connections therefore, a source of radiant energy to be immersed in the liquid being heated, sensing instrumentalities closely adjacent said source, said instrumentalities including a recycling bi-metal switch operable at a predetermined temperature produced by the source aforesaid, and a non-recycling or fuse element connected in series with the said switch and operable at a higher temperature, connections from the control unit to supply power to the radiant energy source and connections to the sensing instrumentalities and to the tank heating means.
Claims7
Liquid level responsive control means for use in connection with the heating of liquid in tanks, comprising a control unit, main power supply connections therefore, a source of radiant energy to be immersed in the liquid being heated and connected to said unit to be energized for radiation generation, sensing instrumentalities closely adjacent said source, said instrumentalities including a recycling switch connected to said unit, said switch being operable to terminate operation of the said source, when the switch is subjected to direct radiation from the source aforesaid when the liquid reaches a predetermined lower level.
Liquid level responsive control means for use in connection with the heating of liquid in tanks, comprising a control unit, main power supply connections therefore, a source of radiant energy to be immersed in the liquid being heated and connected to said unit to be energized for radiation generation, sensing instrumentalities closely adjacent said source, said instrumentalities including a switch connected to said unit, said switch being operable to actuate a signal, when the switch is subjected to direct radiation from the source aforesaid.
Liquid level responsive control means for use in connection with the heating of liquid in tanks, comprising a control unit, main power supply connections therefore, a source of radiant energy to be immersed in the liquid being heated and connected to said unit to be energized for radiation generation, sensing instrumentalities closely adjacent said source, said instrumentalities including a switch connected to said unit, said switch being operable to actuate a signal and terminate operation of the said source when the switch is subjected to direct radiation from the source aforesaid when the liquid reaches a predetermined level.
Dependencies are inferred from the claim text.