Writing devices for plotting and recording apparatus

A recording or plotting apparatus has a writing device which comprises a pen holder carrying a plurality of pens. A penholder assembly is movable from end to end of a gantry which is itself movable across a record surface such as a record sheet or card along an axis perpendicular to the axis of move...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HENDERSON, KENNETH J
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES FOR WRITING OR DRAWING ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS ARTICLES FOR WRITING OR DRAWING UPON BUREAU ACCESSORIES CORRECTION OF TYPOGRAPHICAL ERRORS i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES MEASURING MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PHYSICS PRINTING SELECTIVE PRINTING MECHANISMS STAMPS TARIFF METERING APPARATUS TESTING TRANSPORTING TYPEWRITERS WRITING OR DRAWING IMPLEMENTS
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Beschreibung
Zusammenfassung:	A recording or plotting apparatus has a writing device which comprises a pen holder carrying a plurality of pens. A penholder assembly is movable from end to end of a gantry which is itself movable across a record surface such as a record sheet or card along an axis perpendicular to the axis of movement of the pen holder. Thus, for example, the gantry can move in an X-axis and the penholder can move in a Y-axis. The pen holder is provided with a plurality of writing tips supported in a rotatable turret. The turret is rotated by rotation of a ratchet provided with a plurality of ratchet teeth. The ratchet and therefore the turret is rotated when, in response to movement of the gantry or pen holder, a pawl is engaged with one of the ratchet teeth. When the gantry or pen holder is moved to disengage the pawl from the ratchet tooth the ratchet, and therefore the turret, is rotated, for example, by a defined angle of about 60 DEG , to place a desired one of the pen tips in contact with the record surfaces.