PNEUMATIC TIME DELAY DEVICE

摘要

PNEUMATIC TIME DELAY DEVICE Apparatus for controlling the operation of a pneumatically actuated device such as a milking machine has two chambers one of which has an adjustable throttle valve in a connection to a vacuum line. The other chamber has a connection to the atmosphere and another connection to the vacuum line. A valve controlled by the pressure in the first chamber controls alternatively the flow through the lines to the second chamber. A signal in a control device of the milking machine connects the vacuum line to the throttle valve connection for the evacuation of the first chamber.