This vacuum pump was used in conjunction with a vacuum chamber to calibrate aircraft altimeters and rate-of-climb indicators.
The data plate reads:
LEIMAN BROTHERS INC., Newark, New Jersey
Manufactured January 1952
LEIMAN VACUUM PUMP
Specifications:
Capacity: 3.6 CFM
Vacuum: 10" Hg
Model No. 26-1/2
The pump is driven by a General Electric motor:
Model: 5KH43AB1205
1/4 HP continuous-duty motor
Speed rating: 1725 RPM
115 VAC, 5.0 Amp
60-cycle, single-phase
