Link Register Controls

(Photograph courtesy of Rusty King)

Early Link slider valve registry assembly with opposing pneumatics to push the sliding valves into the on or off positions. This registry unit controls three different lock and cancel functions, such as a mandolin attachment, a rank of pipes or xylophone, and soft pedal.

(Photograph courtesy of Rusty King)

Later style mechanical lock and cancel register control for the mandolin rail in a Link coin piano. In this example, when the larger wine-colored motor pneumatic collapses the mandolin rail is pushed down and into its playing position, and the wooden lever attached to the movable half of the pneumatic latches on a metal pin and keeps the pneumatic closed. This keeps the mandolin attachment in its playing position. Then when it is time to cancel the mandolin effect the small black colored pneumatic (located under the larger wine-colored pneumatic) closes and disengages the latching lever, thereby allowing the larger pneumatic to open and raise the mandolin rail.

(Photograph courtesy of Rusty King)

Xylophone mechanical lock and cancel register control in a Link coin piano. To turn the xylophone on the wine-colored motor pneumatic collapses and opens a valve that connects the xylophone valve chest to the instrument's vacuum supply. The wooden hook near the front end of the pneumatic latches over a pin and keeps the xylophone control pneumatic closed. To cancel the operation of the xylophone the smaller black pneumatic at the left end of the larger wine-colored pneumatic closes, thereby disengaging the latch lever, whereupon the larger pneumatic opens and via the attached metal rod closes the vacuum shutoff valve for the xylophone.