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Step Technique Applied to a Lever-Actuated Ballistic Missile Dot Matrix Printer

IP.com Disclosure Number: IPCOM000041113D
Original Publication Date: 1987-Aug-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Mathews, RD: AUTHOR [+2]

Abstract

The print actuator device shown in the Figure utilizes a magnetic rotor driven by a step waveform electrical pulse and a separate ballistic missile to increase the operating speed of dot matrix printers.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 79% of the total text.

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Step Technique Applied to a Lever-Actuated Ballistic Missile Dot Matrix Printer

The print actuator device shown in the Figure utilizes a magnetic rotor driven by a step waveform electrical pulse and a separate ballistic missile to increase the operating speed of dot matrix printers.

Referring to the Figure, the print actuator 1 includes a stator assembly 2 having a magnetic coil 3, a rotor 4, a rotor lever 5, and a rotor damper 6. The ballistic missile assembly includes a missile shaft 7, a hammer 8, a hammer damper 9, and a hammer adjustment screw 10. The stator assembly 2 has two pairs of stator teeth 2A which cooperate via a magnetic circuit with two pairs of rotor teeth 4A so that an electric current pulse is applied to the coil 3; the stator teeth 2A attract the corresponding rotor teeth 4A, thereby rotating the rotor in a counterclockwise direction R.

In operation, rotation of the rotor 4 and the rotor lever 5 causes translation and acceleration of the missile shaft 7 in direction A. Once this missile shaft reaches a given velocity, the hammer, sliding in a front bearing 12A and a rear bearing 12B, and the missile move in free flight until they impact the print band
11. When the electric current is discontinued, the rotor 4 is no longer driven forward, and under the influence of a permanent magnet 6A behind the rotor damper 6, the rotor slows to a stop and returns to rest against the damper 6. After impact, the hammer 8 and the missile shaft 7 are brought t...