Browse Prior Art Database

Indicator for Carrier Position of a Daisywheel Typewriter

IP.com Disclosure Number: IPCOM000060218D
Original Publication Date: 1986-Mar-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Ringle, TW: AUTHOR [+3]

Abstract

A daisywheel typewriter has a pointer added to one character petal so that movement of this character petal to the print position by a code key enables the pointer to be positioned at the location of the next printed character so that a user will know this location, particularly when printing between two previously printed characters. A daisywheel 1, which has a pointer 2 on one of its character petals, is moved into engagement with a platen 3 by a pivotally mounted hammer 4 being moved by a solenoid 5. Activation of a code key by a user causes a microprocessor of the typewriter to select the character petal on the daisywheel 1 having the pointer 2 and rotate it to the print position. The microprocessor also sends a modulated current wave form to a coil of the solenoid 5.

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Indicator for Carrier Position of a Daisywheel Typewriter

A daisywheel typewriter has a pointer added to one character petal so that movement of this character petal to the print position by a code key enables the pointer to be positioned at the location of the next printed character so that a user will know this location, particularly when printing between two previously printed characters. A daisywheel 1, which has a pointer 2 on one of its character petals, is moved into engagement with a platen 3 by a pivotally mounted hammer 4 being moved by a solenoid 5. Activation of a code key by a user causes a microprocessor of the typewriter to select the character petal on the daisywheel 1 having the pointer 2 and rotate it to the print position. The microprocessor also sends a modulated current wave form to a coil of the solenoid 5. The modulated solenoid coil current allows the armature of the solenoid 5 to travel its full distance to slowly seal, but it does not provide enough energy to allow the print hammer 4 to cause the character petal on the daisywheel 1 to impact the platen 3 to print. Thus, the print hammer 4 and the daisywheel 1 stop a small distance from the platen 3 to allow the user to sight the location of the next character by the pointer 2.

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