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US 4,270,866 AGranted
Platen positioning attachment for typewriters for typewriting musical notation
OwnerGuido Pasqualiniinventor
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OwnerGuido Pasqualiniinventor
Estimating the term…
An attachment for installation upon a typewriter for applying musical notations to a sheet material and comprising a frame pivotally mounted on the typewriter body, the frame including a bridging member at one end of the frame adjacent the platen of the typewriter and a secondary keyboard at the opposite end of the frame. The bridging member carries rotatable, axially parallel cylindrical members spaced along the length thereof and oriented generally vertically to engage plural rollers oriented axially parallel to the platen and engaged thereagainst. The secondary keyboard carries individual keys, each having depending stems selectively engageable with a spring biased lever when a selected one of said keys is depressed. The keys each represent an imprinting location on a musical staff for application of the musical characters controlled by the principal keyboard of the typewriter. Depression of a selected one of the secondary keys causes movement of the spring biased lever to pivot the frame a given degree, raising the cylinders a predetermined height and thus causing rotation of the rollers whereby to rotate the platen (and the sheet guided thereby) incrementally to place the imprinting location for reception of a musical character imprint at such location relative a musical staff as required by the operator.
In a type bar typewriter including a carriage mounted for reciprocation, an elongated cylindrical platen means journaled in the carriage for rotation about a longitudinal axis for receiving sheet material to be imprinted, disengageable means for effecting step-wise rotation of the platen means, a primary character keyboard and character type bar means for imprinting characters on the sheet material, the improvement comprising platen positioning means operable during disengagement of the platen step-wise rotation means for incrementally rotating the platen means for advancing the sheet material to a desired type bar imprinting location relative to a musical staff imprinted on the sheet material, said platen positioning means comprising frame means, means mounted said frame means on the typewriter for pivotal movement, said frame means including a pair of spaced generally parallel coextensive supports, a bridging member secured to said supports at one end thereof, a secondary musical notation keyboard means secured to said supports at the other end thereof and including a plurality of depressible keys, each key representing a different imprinting location, roller means in driving relation to said platen means, said bridging member including means for rotating the roller means and the platen means in response to depression of a secondary musical notation keyboard means.
Dependencies are inferred from the claim text.