double-barreled vacuum pump
Date1900-1920
Inventory Number1996-1-0234
ClassificationVacuum Pump
Subject
Maker
American
?
Cultural Region
Dimensions66 x 56 x 32 cm (26 x 22 1/16 x 12 5/8 in.)
Material
Accessorieslong bolt
DescriptionThe wheel that set in motion the two pistons was itself put in rotation by a strap linked to a steam engine. A crank mechanism is responsible for the vertical motion of the two pistons. A glass bottle attached to the central pillar has rubber tubes going to the two piston chambers. Grease was pumped in to maintain the pistons lubricated. The whole instrument is fixed on a rectangular base, which could be bolted down. It is still greasy.
Signedunsigned
ECO Motor Industries Ltd.
Date: circa 1976
Accessories: box; brochure of <i>Stirling Hot Air Engine</i>
Object number: DW1978
Percy Williams Bridgman
Date: circa 1938
Accessories: one bolt protector; one attachment; two large bolts, black and white photographs (C6-G1). Parts can be found in drawer B11-I8. Bridgman Press Manual (copy) in instrument file folder
Object number: 1997-1-1819a
Percy Williams Bridgman
Date: 1924-1937
Accessories: cardboard box of spare parts; rubber tube; yellow hand pump; metal wire; torque wrench; wrenches (3); 1 CD; 1 audio cassette; 1 user's manual; 1 graph
Object number: 2004-1-0404