Reliable vacuum and vacu-vapor heating equipment (1915)
The Bishop-Babcock-Becker Co. · The Bishop-Babcock-Becker Co. · leaf 23
ic Electric Switch is very sub-stantially made, and is mounted on a neat slatepanel. The Vacuum Controller is constructed ofheavy bronze, and is mounted with the Auto-matic Electric Switch on a wood panel. The Automatic Electric Switch and VacuumController No. 1859 is very simple; has no parts… … Twenty VACUUM HEATING EQUIPMENT STRAINER WITH CHECK VALVE
Heating units · Vacuum-tube collectors · HVAC ducts and casings
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