Coffee-making apparatus

Claim 1

A coffee-making apparatus comprising a hollow housing member, an electric throughflow heater located in said housing, a water reservoir supported on the upper end of said housing and having a bottom wall above said heater, a tube extending upwardly from said heater and centrally through said reservoir for connection to a horizontal tube having an outlet to one side of said reservoir, said bottom wall having an opening therein, a float chamber below said opening and in communication with said reservoir, a connection from said float chamber to the bottom of said throughflow heater to pass water from said reservoir to said heater and out said tube to said outlet, said float chamber having sidewalls connected to the bottom wall of said reservoir, a hollow float in said float chamber pivotally connected to a sidewall of said chamber by a flexible tubular sleeve fixed to said sidewall and opening through said sidewall, a mercury switch in said float positioned so that pivotal up-and-down movement of said float as said chamber is filled and emptied will close and open said switch, and lead wires passing through said tubular sleeve to said switch and connected to energize said heater when said switch is closed.