Writing pressure-changing device for recording device or the lik

Details Writing pressure-changing device for recording device or the lik Writing pressure-changing device for recording device or the lik

1990-12-14

1992-06-09

Fuller, Benjamin R.

Recorders

Markers and/or driving means therefor

Stylus feature

346140A, 346 29, G01D 1516

Patent

active

051211408

ABSTRACT:
A writing-pressure changing device for use in a recording device or the like in which when one end of a pen holder is caused to ascend by a device such as a plunger. In this device the pen holder is pivotally moved with respect to a pivot, so that a recording pen supported on the other end of the pen holder is caused to descend to be brought into contact with a recording surface to make a drawing. The writing pressure-changing device includes a first cylinder which has an inclined guide groove formed in a side wall thereof, and where the first cylinder is adapted to be mounted around the plunger; a second cylinder is slidably fitted in the first cylinder and has a switch lever formed on an outer peripheral surface of the second cylinder, the switch lever projects from the guide groove in the first cylinder, and the second cylinder is adapted to be mounted around the plunger. A spring is engaged with an inner side of an upper end of the second cylinder and carried by a lower end of the plunger. In this way, the switch lever is moved along the guide groove to expand and contract the spring thereby adjusting a writing pressure of the recording pen.

REFERENCES:
patent: 3127678 (1964-04-01), Muldoon
patent: 4157552 (1979-06-01), Nakajima
patent: 4560996 (1985-12-01), Aratsu
patent: 4757330 (1988-07-01), Onozato

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