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US 4,191,084 AGranted
Automatic tracking apparatus
OwnerLee Von Gunteninventor
Life of this patent
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Abstract
An automatic tracking apparatus is provided for maintaining alignment of music rolls in player organs and player pianos using an improved, air pressure controlled, sensing and control device. More particularly this system incorporates an air pressure sensing device utilizing a piston/cam controlled pendulum to operate a pneumatic alignment device.
Claims8
In an automatic alignment system wherein a feed roller passes perforated sheets over an intermediate tracker bar to a take up roller, and where the tracker bar has air flow sensors disposed near it's outer edges to provide control signals to pneumatic aligning devices, the improvement which comprises:
- an air flow sensing device having an outer casing member;
- multiple cylindrical inlet ports disposed in spaced relation about said casing and connected to receive air flow from the sensors on the tracker bar;
- pistons slidably mounted for reciprocal motion in partial sealing contact within said inlet ports for providing motion responsive to the air flow in said ports;
- a control arm pivotally mounted at one extremity of said casing and depending therefrom in cam contact with said pistons to provide motion of said control arm responsive to said piston movement;
- a projection from said control arm protruding external to said casing to provide external control to the aligning device corresponding to the position of said control arm.
2 more elements
Dependencies are inferred from the claim text.