Antique Pneumatic Temperature Regulation Panel by Johnson vintage simulators Rows of hand-set steel pins

Rows of hand-set steel pins deflect the balls as they descend

original porcelain-and-brass pulls

Blocks of this kind were used by newspapers and theatre presses to print advertisements and playbills

MM - C-10398 - 081624

in doing so

Antique Pneumatic Temperature Regulation Panel by Johnson vintage simulators Rows of hand-set steel pinsc. 1910s 1930s; Johnson Service Company New York A handsome early pneumatic control panel from the Johnson System of automatic temperature regulation one of the foundational technologies that shaped modern HVAC control. Housed in a solid wood case with dovetailed construction, the panel incorporates a large Johnson Service Company air pressure gauge, two manual dial controls labeled Open and Closed, and a metal maker's plate detailing the system's