Reciprocating drive mechanism

Details Reciprocating drive mechanism Reciprocating drive mechanism

1984-10-09

1986-07-08

Sewell, Paul T.

Typewriting machines

Carriage or carriage-moving or movement-regulating mechanism

Carriage-feed mechanism

101 9304, 101 9309, 400121, 400320, 400352, 267158, B41J 2528, B41J 1950

Patent

active

045990077

ABSTRACT:
A reciprocating drive mechanism, capable of producing a substantially trapezoidal velocity profile, reciprocates the hammer banks of a dot matrix printer, or printers in general, at a relatively high frequency (40 HZ), and a high constant velocity (34 to 40 in/sec). Utilizing a set of non-linear springs, the hammer banks are reciprocated at one of the many possible resonant frequencies of the non-linear spring mass system, thus minimizing power consumption. Single action solenoids or a voice coil type motor is servo controlled to compensate for the energy loss due to damping. An optical switch establishes the zero position of the hammer banks at midlength of the travel. A velocity transducer measures the velocities at all positions. By integrating the velocities, the positions at any time of travel is known for proper placement of the print dots.

REFERENCES:
patent: 4227455 (1980-10-01), Pennebaker
patent: 4322063 (1982-03-01), Fishbeck
patent: 4402620 (1983-09-01), Kekas
patent: 4461984 (1984-07-01), Whitaker

Affiliated with

Also associated with

Rating

Reciprocating drive mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Reciprocating drive mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reciprocating drive mechanism will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1448865