Electric stippler with lobed cam-disk drive
OwnerRuben M. Lopezinventor
Life of this patent
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Abstract
A draftsman's stippling device, small enough to be manually held during use, includes a vibratable cantelever bar supported in a small housing and having a free end projecting to the outside on which end a stippling pen is mounted. A cam disk having lobes about its periphery is adapted to be rotated by means of a battery powered mini-motor and reduction gearing at high speed against the upper surface of the bar. The lobes on the spinning cam disk successively depress the bar against the opposing tension of a return spring, whereby the bar and pen rapidly vibrate as a unit to enable stippling of a drawing surface disposed below the pen.
Claims5
An electric stippler for use by draftsmen, the stippler comprising:
- a housing, the housing being of small size adapted to be held in the hand of the draftsman during use of the stippler, a cantelever bar disposed within the housing in a horizontal position between a top wall and a bottom wall of the housing, the bar having a rear end fixed to a support within the housing and having a forward free end projecting freely through a vertical slot in a front wall of the housing, a stippling pen fixed to the free end and having a tip extending downward, the bar and pen as a unit being vibratable relative to the fixed end of the bar, a battery energizable mini-motor within the housing, and means operatively associated with the mini-motor for imparting vibration to the bar and pen as a unit.
Dependencies are inferred from the claim text.