Self renewing stylus structure

Claim 2

A recorder comprising: a record member on which a desired pattern is to be reproduced; a recording electrode stylus means wound in a spiral configuration with a tendency to enlarge and unwind said configuration in response to a revolution torque; a rotatably mounted disc means; means for rotating said disc means at a given velocity during a recording operation; reel means for accommodation of said spirally wound electrode stylus, said reel means being rotatably secured on an axis on said disc means; and stylus protrusion means coupled to said reel means for imparting to the stylus means, a revolution torque of a selected value which tends to enlarge and unwind said spiral configuration and cause a tip portion of said stylus to protrude from said reel means toward a recording position on said record member.

Claim 3

The recorder of claim 1 wherein thEre is further provided a stylus holder for supporting at a recording point on said record member said tip portion of said stylus.

Claim 4

The recorder of claim 1 wherein adjustment means are provided to selectively control the value of the revolution torque generated by said stylus protrusion means.

Claim 5

The recorder of claim 1 wherein said reel means includes a cover in which a guide means for said tip portion of said stylus is provided, said guide means being offset from the circumference of said spiral configuration toward the center thereof and cavity means having a width at least equal to the radius of said spiral configuration, said cavity communicating with said guide means.

Claim 6

The recorder of claim 1 wherein the record member comprises an electrosensitive paper having a conductive layer and there is further provided, electrode means for receiving signals to be recorded in cooperation with said electrode stylus during the recording operation, recording paper detection means contacting said conductive layer during the recording paper feeding process for establishing an electric circuit via the conductive layer together with said electrode means, said electric circuit upon being established generating a control signal, and switching circuit means for controlling the application of the signals to be recorded in response to said control signals from said electric circuit.

Claim 7

The recorder of claim 1 wherein said stylus means comprises an elastic and anti-abrasive material.

Claim 8

The recorder of claim 1 wherein said reel means is rotatably disposed on said disc means for rotation thereon at a velocity independent of the disc rotation velocity and said stylus protrusion means comprises: braking means mechanically coupled with said reel means for braking only the revolution of said reel means to produce a variation in the relative velocities of said reel and disc means to thereby impart to the stylus means a revolution torque in a direction which causes said tip portion of said stylus to protrude from said reel toward a recording position on said record member.

Claim 9

The recorder of claim 7 wherein said braking means comprises an electric motor means for dynamically braking the rotation of said reel means.

Claim 10

The recorder of claim 8 wherein said electric motor is a direct current motor.

Claim 11

The recorder of claim 9 wherein the armature of said motor is provided with a variable shunt resistor means for controlling the value of said revolution torque.

Claim 12

A recorder comprising: a record member on which a desired pattern is to be reproduced; a recording electrode stylus made of elastic and anti-abrasive material and shaped in a spiral fashion as a whole with a tendency to enlarge the spiral configuration due to the unwinding force thereof; a disc rotating at a given velocity at least during the recording operation; a reel so movably secured on the disc that it may rotate at certain velocities irrespective of the revolution velocity of the disc, said reel having a cavity for accommodation of the spirally-shaped electrode stylus and an aperture formed in a direction of the tangent touching the stylus winding circumference therein, one end of the stylus being fastened within the reel; braking means mechanically coupled with the reel for braking only the revolution of the reel thereby to provide to the electrode stylus a revolution torque causing the other end of the electrode stylus to be protruded through the aperture from the reel; and a stylus holder for supporting at a recording point on the record member the protruded end portion of the electrode stylus.

Claim 13

A recorder comprising: a record member on which a desired pattern is to be reproduced; a recording electrode stylus made of elastic and anti-abrasive material and shaped in a spiral fashion as a whole with a tendency to enlarge the spiral configuration due to the unwinding force thereof; a disc rotating at a given velocity at least during the recording operation; a reel so movably secured on the disc that it may rotate at certain velocities irrespective of the revolution velocity of the disc, said reel having a cavity for accommodation of the spirally-shaped electrode stylus and an aperture formed in a direction of the tangent touching the stylus winding circumference therein, one end of the stylus being fastened within the reel; braking means mechanically coupled with the reel for braking only the revolution of the reel thereby to provide to the electrode stylus a revolution torque causing the other end of the electrode stylus to be protruded through the aperture from the reel; and a stylus holder for supporting at a recording point on the record member the protruded end portion of the electrode stylus.

Claim 14

A recorder comprising: an electrosensitive recording paper on which a desired pattern is to be reproduced; at least one recording electrode stylus made of elastic and anti-abrasive material and shaped in a spiral fashion as a whole with a tendency to enlarge the spiral configuration due to the unwinding force thereof; a rOtary disc; at least one reel having a cavity for accommodation of the spirally-shaped electrode stylus; at least one reel installation plate secured on the disc in such a way that the reel may rotate on its axis; a double shaft arrangement having first and second shafts; a driving motor mechanically coupled with the rotary disc via the first shaft for rotating the rotary disc on its axis together with the reel and the reel installation plate secured on the rotary disc; at least one idler gear positioned between the second shaft of the double shaft arrangement and the reel; a braking motor mechanically coupled with the reel via the second shaft and the idler for braking only the revolution of the second shaft thereby to provide to the reel a revolution torque in a direction for causing the tip of the recording electrode stylus to be protruded from the reel; and at least one stylus holder for supporting at a recording point on the recording paper the tip portion of the recording stylus.

Claim 15

A recorder comprising: an electrosensitive recording paper on which a desired pattern is to be reproduced; at least one recording electrode stylus made of elastic and anti-abrasive material and shaped in a spiral fashion as a whole with a tendency to enlarge the spiral configuration due to the unwinding force thereof; a rOtary disc; at least one reel having a cavity for accommodation of the spirally-shaped electrode stylus; at least one reel installation plate secured on the disc in such a way that the reel may rotate on its axis; a double shaft arrangement having first and second shafts; a driving motor mechanically coupled with the rotary disc via the first shaft for rotating the rotary disc on its axis together with the reel and the reel installation plate secured on the rotary disc; at least one idler gear positioned between the second shaft of the double shaft arrangement and the reel; a braking motor mechanically coupled with the reel via the second shaft and the idler for braking only the revolution of the second shaft thereby to provide to the reel a revolution torque in a direction for causing the tip of the recording electrode stylus to be protruded from the reel; and at least one stylus holder for supporting at a recording point on the recording paper the tip portion of the recording stylus.