Pencil device for plotting machine
AssigneeBenson, Inc.
InventorMichel Roche
Life of this patent
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Abstract
A pencil device for a plotting machine comprises a housing (10) including a barrel (13) with a passage (13a) therethrough for receiving a lead (12) said passage having an exit for the lead at a forward end of said barrel; lead feeding means (11, 14, 15) located in said housing for containing spare leads and for continuously feeding the passage of said barrel with a lead; lead driving means (16, 17) for pressing the lead located in the passage against the recording medium during a writing operation; and means (36) for urging the forward end of the barrel in contact with the recording medium so that a consumed lead is replaced by a new lead without interrupting a trace being produced.
Claims17
A pencil device for use with a plotting machine to produce a trace on a recording medium when said pencil device is moved on the recording medium during a writing operation, comprising:
- a housing comprising barrel means with passage means therethrough for receiving a lead, said passage means having an exit for the lead at a forward end of said barrel means;
- lead feeding means located in said housing for containing spare leads and for continuously feeding said passage means with a lead;
- lead driving means in said housing for pressing said lead located in said passage means against said recording medium during the writing operation;
- and
- means for urging the said forward end of said barrel means in contact with said recording medium whereby a consumed lead is replaced by a new lead without interrupting a trace being produced.
A pencil device for use with a plotting machine to produce a trace on a recording medium when said pencil device is moved on the recording medium during a writing operation, comprising:
- a housing comprising barrel means with passage means therethrough for receiving a lead, said passage means having an exit for the lead at a forward end of said barrel means;
- lead feeding means located in said housing for containing spare leads and for continuously feeding said passage means with a lead;
- and
- lead driving means in said housing for pressing said lead located in said passage means against said recording medium during the writing operation, said lead driving means being selectively controllable for releasing the pressure on said lead thereby discontinuing the production of a trace on the recording medium.
Dependencies are inferred from the claim text.