Modification in Design of Laboratory Vacuum Pumps II.

摘要

A simple modification for Duo-Seal vacuum pumps of the 1405 series is described which permits oil level readings to be taken when the mechanical pump is located in a remote or difficulty accessible position in high vacuum systems. Since determinations of the oil level and its condition in these pumps are simplified by the change in design, the more reliable maintenance procedures are expected to result in longer pump life and fewer pump failures. (MM).