molecular pump
date: label: date made
content: ca 1920
notes: label: Description (Brief)
content: Molecular Pump, consists of motor and switch panels. Motor has black metal frame with a brush assembly on each end, and 2 terminal boards mounted on top. A tag on top of the motor has "Ch. Beaudouin / Constructeur / 31 Rue Lhomone / * Paris." Another tag on the side "Cour't Continu [direct current] / No. 89 Tours 4000 / Volts 110 Amperes 4." One switch is a 3 position rotary switch mounted on a switch box connected to one of the terminal boards on top of the motor and to one brush assembly. The other terminal board has a double-throw, 4-pole knife switch connected to the other terminal board and brush assembly. Knife switch positions marked: "Demarrage" [start] and "Marche" [run].
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Princeton University, Department of Physics, thru Frank Shoemaker
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.330592
label: catalog number
content: 330592
label: accession number
content: 299612
objectType: label: Object Name
content: Molecular Pump
physicalDescription: label: Measurements
content: motor: 8 in x 13 1/2 in x 6 1/2 in; 20.32 cm x 34.29 cm x 16.51 cm
label: Measurements
content: rotary switch: 5 1/2 in x 3 5/8 in x 4 7/8 in; 13.97 cm x 9.2075 cm x 12.3825 cm
label: Measurements
content: knife switch: 6 in x 4 7/8 in x 2 in; 15.24 cm x 12.3825 cm x 5.08 cm