Blast gate

Abstract

A blast gate to control the application of vacuum pressure to a particulate generating machine so that particulate may be drawn away from the machine and isolated in a vacuum container. The blast gate may be opened when either a vacuum or particulate generating machine is switched on. The blast gate is designed to be inserted in a duct leading from the vacuum to the particulate generating machine. The electromechanical design allows two switches to be activated by a mechanical rotating arm. The switches respectively allow the gate to be held in the open position or in the closed position as well as activating the mechanical arm whereby the gate is moved to the open or closed position.

What is claimed is: 
     
         1 . A blast gate and controller for the application of vacuum pressure to particulate generating machines comprising:
 a. a controller housing connectable to a gate housing,   b. a controller mechanism contained within said controller housing,   c. a gate slidably disposed within said gate housing,   d. said controller mechanism connectable to said gate whereby said gate may be withdrawn and inserted within said gate housing.   e. said gate housing having a first aperture and a corresponding second aperture, said first and second apertures capable of being opened and closed by said gate,   f. said first aperture connectable to a duct leading to a vacuum and said second aperture connectable to a duct leading to a particulate generating machine.