US858350A - Drawing-pen. - Google Patents

Description

v PATENTBD JUNE 25, 1907.- W. B. PHILLIPS.

DRAWING PEN.

AYPLIOA'I ION FILED NOV- 12. 1908.

INVENTOR ATTORNEY WALTER B. PHILLIPS, OF KANSAS CITY, KANSAS.

DRAWING-PEN.

Specification of Letters Patent.

Patented June 25, 1907.

Application filed November 12, 1906. Serial No. 342,994.

To all whom it may concern:

Be it known that I, WALTER B. PHILLIPS, a citizen of the United States, residing at Kansas City, in the county of. Wyandotte and State of Kansas, have invented certain new and useful Improvements in Drawing- Pens, of which the following is a specification.

. This invention relates to improvements in drawing-pens, and appertains more particularly to an attachment whereby the blades of the pen may be quickly opened or closed Without changing the position of. the setscrew usually employed for accomplishing the above results.

A draftsman frequently has occasion, to cleanse the blades of his pen and in order to ain access to the inner sides thereof must force them apart. This operation is usually accomplished through the instrumentality of the set-screw above referred to, and considerable time is consumed in turning said set-screw and in obtaining proper adjustment of the blades before drawing can be resumed. By employing my attachment the greater portion of this time may be saved, as the blades can be instantly forced apart or drawn together without adjusting the setscrew.

In order that the invention may be fully understood reference will now be made to the accompanying drawing, in which Figure 1 shows a broken side elevation of a drawing-pen provided with my attachment in its operative position. Fig.2 is a side elevation with the attachment in an inoperative position. Fig. 3 is a detailed side elevation of the attachment removed from the pen. Fig. 4 is a rear elevation thereof, and Fig. 5 is a plan View of the same.

1 designates a drawing-pen of ordinary construction, comprising a handle 2, a rigid blade 3, a resilient blade 4, and a set-screw 5 whereby adjustment of the blades is effected.

6 designates my attachment, which is preferably stamped from one piece of metal to reduce the cost of production. Said attachment is interposed between a shoulder 7 of the set-screw and blade 4, upon which it is slidably mounted.

The attachment comprises an inclined portion 8 having a longitudinal slot 9 the ends of which are adapted to contact with the setscrew and thus ward movement of the attachment, a portion 9 arranged substantially parallel with the pen, front and rear fingers 10, 11, re-

limit the backward and for spectively, slidably embracing the sides of blade 4 to guide the attachment thereon, a bridge 12 slidably engaging the upper surface of blade 4, and an upturned handle 13 at the rear thereof.

In practice the attachment is moved forward until portion 9 engages shoulder 7, as shown in Fig. 1. Blade 4 is then adjusted as desired by the set-screw 5. When it is desired to open the blades for the purposes of cleansing, inspecting, or grinding the same Without changing the position of the setscrew 5, the attachment is slid backward to the position shown in Fig. 2 by engaging the handle with the index finger. To close the blades without changing the position of the set-screw, it is only necessary to force the attachment forward to the position shown in Fig. 1, by pressing against the handle with the thumb. As the attachment is secured to the pen by means of set-screw 5, it maybe readily removed by taking out said setscrew.

- From the above description it is apparent that I have produced a device which is simple in construction, may be produced at low cost, and does not require alterations in the construction, or additional work of any kind upon the pen to apply orremove the attachment.

Having claim is:

1. The combination with a drawing-pen,

and a set-screw for adjusting the blades thus described my invention, what thereof, of an attachment slidably mounted upon the pen to secure the opening and closing of the blades and consisting of an inclined surface adapted to engage the set-screw, and a portion substantially parallel with the upper surface of the pen adapted to engage t e set-screw.

2. The combination with a l and a set screw for adjusting the blades thereof, of an attachment slidably mounted upon the pen to secure the opening and closing of t, e blades and consisting of an inclined surface adapted to engage the set-screw, a portion substantially parallel with the upper surface of the pen adapted to engage the setdrawing-pen,

screw, and guide members slidably engaging the pen.

3. The combination with a drawing-pen, and a set-screw for adjusting the blades thereof, of an attachment slidably mounted upon the pen consisting of an inclined surface adapted to engage the set-screw, a portion substantially parallel with the upper surface of the pen adapted to engage the setscrew, and a bridge slidably mounted upon the upper blade.

5 4. The combination with a drawing-pen,

and a set-screw for adjusting the blades thereof, of-an attachment slidably mounted upon the pen to secure the opening and closing of the blades and consisting of an inclined l0 surface adapted to engage the set-screw, a

portion substantially parallel with the upper surface of the pen adapted to engage the setscrew, and a handle at the rear of the attachment.

In testimony whereof I a'lhx my signature I 5 in the presence of two witnesses.

WALTER B. PHILLIPS. WVitnesses F. Gr. FISCHER, M. J. Cox.

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