The pump was used with a vacuum chamber to calibrate aircraft altimiters and aircraft rate of climb indicators
The data plate reads LEIMAN BROTHERS INC Newark NJ
Manufactured Jan 1952 LEIMAN VACUUM PUMP
Capacity 3.6 cfm 10” Hg Vac Model NO 26-1 1/2
Driven by General Electric Motor
Model 5KH43AB1205 1/4 HP Continuous Speed Rating
1725 RPM 115 VAC 5.0 Amp 60 Cy, Single Phase
