Today in 1907, US Patent 856140 A was issued, an invention of Joseph Berkowitz and William Lapin, for their “Triple Pipe Beer Cooler.” There’s no Abstract, though it’s described this way in the application:
This invention relates to triple pipe beer coolers adapted to permit a continuous circulation in separate pipes, respectively, of beer, brine and ammonia, the various pipes being arranged and connected at their ends to form a continuous coil, having an inlet at one end and an outlet at the other.
The invention relates more particularly to an improvement in the construction of the heads or bends connecting in alternate relation the opposite ends of the pipes of the coil.
