Resonant frequency reciprocating drive mechanism

Details Resonant frequency reciprocating drive mechanism Resonant frequency reciprocating drive mechanism

1988-02-09

1989-09-26

Sewell, Paul T.

Typewriting machines

Carriage or carriage-moving or movement-regulating mechanism

Carriage-feed mechanism

400322, 267160, 267161, B41J 156

Patent

active

048696080

ABSTRACT:
A resonant frequency reciprocating print bar drive mechanism having print bar assembly mass 12 and counterweight 13 held in spaced relationship to each other by first and second leaf springs 16 and 17, which are of equal flexural stiffness. Drive solenoid 14 is mounted between the first and second springs 16 and 17, for inducing reciprocal oscillation between print bar 12 and counterweight 13. The print bar assembly, counterweight and spring assembly is itself suspended as a single unit from perimeter frame 11 by suspension springs 15. Suspension springs 15 have a much lower spring rate than that of leaf springs 16 and 17, and, as a result, the print bar assembly 12 and counterweight 13 will reciprocally oscillate, relative to each other, at a single resonant frequency.

REFERENCES:
patent: 3417984 (1968-12-01), Sindlinger
patent: 4236835 (1980-12-01), Mayne et al.
patent: 4359289 (1982-11-01), Barrus et al.
patent: 4599007 (1986-07-01), Khorsand
patent: 4637307 (1987-01-01), Miller

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