US684437A - Drawing-pen. - Google Patents

Description

IIMIHNIIF ml 5 v Patented Oct. l5, l90l. W. KEUFFEL. DRAWING PEN.

(No Model.)

Wilma mo L 7 ZM/L/I/Z/ Uwirn STATES ATENT rricn.

IVILHELM KEUFFEL, OF I-IOBOKEN, NEW JERSEY, ASSIGNOR TO THE KEUFFEL & ESSER COMPANY, OF NEW JERSEY.

DRAWING-PEN.

SPECIFICATION forming part of Letters Patent No. 684,437, dated October 15, 1901.

Application filed January 18, 1901. Serial No. 43,700. (No model.)

To aZZ whom it may concern.-

Be it known that I, WILHELM KEUFFEL, a citizen of the United States, residing in the city of Hoboken, in the county of Hudson and State of New Jersey, have invented a new and useful Improvement in Drawing Pens, of which the following is a specification.

This invention relates to ruling or drawing pens which consist of two blades adjustable toward or from each other to decrease or increase the distance from their points or the pressure of the points against each other in order to make lines of greater or less width or thickness. In such pens it is a desideratum that the blades be arranged so that they may be widely separated from each other for the purposes of inspection, cleaning, and grinding or sharpening and again closed together without disturbing the means whereby the proper adjustment of the blades is at tained; and the object of this invention is to provide improved means whereby such a result is accomplished.

IVith this object in view the invention consists in the improved construction, arrangement, and combination of parts hereinafter fully described and afterward specifically claimed.

In the accompanying drawings, Figure 1 represents a View in side elevation, on an enlarged scale, of a pen embodying my improvements, the handle being omitted and the blades being shown adjusted to position for making a line. Fig. 2 represents a similar view with the blades open for inspection, cleaning, or sharpening. Fig. 3 represents a view in front elevation with the parts adjusted as in Fig. 1. Fig. at represents a view in elevation of the adj usting devices arranged in their proper relative positions,but detached from each other. Fig. 5 represents a view similar to Fig. 2, illustrating a slight modification.

Like letters of reference mark the same parts wherever they occur in the several figures of the drawings.

In pens of the general class now under consideration the following parts are almost universally provided, to wit: two blades, as at a b in Figs. 1, 2, and 3 or at 0', Z) in Fig. 5, which blades are either made integral of a single piece of steel, as in Figs. 1, 2, and 3, or one hinged to the other, as at c in Fig. 5, means for normally and yieldingly holding the two blades apart, as the elasticity of the part 61 of the blade b in Figs. 1, 2, and 3 or a spring between the blades when hinged, an instance of which is shown at cl in Fig. 5, and finally devices for moving the blades toward each other against the force of such normal opening means, as by the adjusting bolt or screw 6 and nut f. (Shown in Figs. 1, 2, 3, and 5.) Such opening means and adjusting screw and nut form no part of my present invention and are simply shown as instances of the ordinary construction of such pens and to assist in the proper illustration of my invention.

The screw 6 in Figs. 1, 2, and 3 fits slidably in an opening in the blade to, being projected from a fiat bar g, which slidably fits in a correspondingly-shaped smooth opening in the blade I). The bar 9 is pivotally connected by a pin 72, with a cam-lever 'i, which is bifurcated, its ends j j straddling the end of bar 9 and bearing as cams against the outside of blade I). In Fig. 5 the screw 6 is extended through blades a b, and the lever t' is pivoted directly to it at h. In the position shown in Fig. 1 these ends j j lie flat upon the outer surface of blade I) and serve as stops to prevent the bar g from being drawn through the openings in blades a and b and in the capacity of a bolt-head, whereby the turning inward of the nut f on screw 6 will draw the blade Z2 toward the blade at against the outward pull of the said blade b due to its spring portion d until the desired adjustment of the blades a and b is reached.

With the hinged blade I), Fig. 5, the spring d, as before stated, takes the place of the elastic portion cl of blade I) and normally forces the blades 0. b apart in the same manner. When, however, it is desired to open the blades for the purposes mentioned, the

again brought together, preserving the original adjustment.

The advantages attending the use of this invention Will be obvious to those skilled in art, and it will further be obvious that slight changes may be made in the construction of the various parts Without departing from the spirit and scope of my invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. The combination with a ruling or drawing pen having a fixed and a movable blade of a bolt slidably fitted in openings through both blades, a lever having bifurcated cam ends straddling and pivoted to one end of the bolt, and separate and independent adj usting means at the opposite end of the bolt, substantially as described. V

2. The combination with a ruling or drawingpen having afixed and a movable blade, of abolt slidably fitted in openings through both blades, a nut at one end of the bolt, and a lever having bifurcated cam ends straddling and pivoted to the other end of the bolt, substantially as described.

3. The combination in a ruling or drawing pen of two blades normally and yieldingly' pressed apart,a bolt slidably fitted in registering openings in the two blades and projecting beyond the outer faces of both blades, a nut threaded on one of the projecting ends of the 7 WILHELM KEUFEEL.

\Vitnesses:

HERMAN MEYER, MABEL K. WVHITMAN.

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