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[Home] [Morton Chest] [Wurlitzer Chest] [Wurlitzer Offset] [Link/Kilgen Chest] [Kimball Reg] [Kimball Trem] [Blower] |
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Tremulant Operation When the Tremulant is inactive, the pneumatic pouch at Ad is expanded and the rod forces the head of the tremulant up which raises the pallet at Bb and closes the tremulant exhaust port. The pneumatic path is from Aa which is at wind chest pressure through the primary valve Ac which is closed because the primary pouch Ab is expanded because the magnet, Ae is not activated. When a stop tab controlling the tremulant is activated, pouch, Ab , is exhausted to atmospheric air and collapses transferring valve, Ac to exhaust pouch Ad to atmospheric air which..allows the pallet, Bb,to float free and release chest wind through adjustable port Bc. The slide, Bc, determines the speed of the tremulant. The exhaust air released by Bc is at a much slower rate than the air coming from the wind chest through Bd. As the wind chest air pushes the head of the tremulant upward, the head of the tremulant to pull the pallet, Bb, closed which starts the cycle anew. Depth of the tremulant is determined by the size of the wind line and input port Bd ( Bd frequently has a gate valve.) and the amount of distance pallet Bc drops relative to the head of the tremulant. The tremulant is shut off by de-energizing magnet, Ae, which causes Pouch Ab to fill which transfers valve Ac to fill pouch Ad. The dowel forces the tremulant head up and closes Bb, which turns off the tremulant. |
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