US1262801A - Ruling-pen attachment. - Google Patents

Description

R. L INGEBRI.GTSEN. RUUNG PEN ATTACHMENT.

APPLICATION FILED MAR. 12. 1917.

1,262,801. Patented Apr. 1 1918.

RALPH L. INGEBRIG S'EN', or MISSOULA, ivroNTAnA.

norms-P N ATTACHMENT.

Application filed March 12, 1917. Serial K0115 1359.

To all whom it may concern:

Be it known that I, RALPH L. INGEBRIGT- SEN, a citizen of the United States, residing at Missoula, in the county of Missoula, State of Montana, have invented certain new andv useful Improvements in Ruling-Pen Attachments; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in draftsmens ruling pens, and particularly to attachments therefor.

One object of the present invention is to provide a novel and simple device foraccurately gaging the width of the line the pen is to make.

Another object is to provide a device of this character which can be quickly and easily slipped onto the ordinary ruling pen now in use.

A further object is to provide a device of this character whereby the draftsman can instantly tell to what degree he is opening or closing the jaws of the pen, when he turns the adjusting screw in either direction.

Other objects and advantages will be apparent from the following description when taken in connection with the accompanying drawing.

In the drawing:

Figure 1 is a front elevation of a ruling pen equipped with my gage attachment.

Fig. 2 is a side elevation of the same.

Fig. 3 is an enlarged longitudinal sectional view taken on the line 3-3 of Fig. 1.

Fig. 4 is an enlarged transverse sectional view taken on the line 4 4: of Fig. 1.

Referring particularly to the accompanying drawing, 10 represents the rigid or stationary leg or jaw of the ruling pen, and 11 the adjustable and flexible le or jaw. The adjusting screw 12 is disposec loosely in the opening 13 in the jaw 11, and threaded into an opening 14: in the jaw 10. The upper portion of the jaw 11 is reduced in thickness or flattened to producethe required amount of flexibility in the jaw. The head of the screw is formed with the milling 15 around the peripheral edge, as clearly shown in the drawing; In connection with the said reduced portion of the jaw 11 and the milled head of the screw my invention is used.

The attachment includes a base member 16 having an integral pair of outwardly Specification of Letters rate' a I Patented bowed'legs 17 whichh'ave their'extremities directed inwardly toward each other, at 16, andfarranged to grip the opposite edges of the flattened'portion of the legor jaw 11, when the screw is removed. Formed integrally with the base, and extending longitudinally thereof,--is a cylindrical member 18, both ends and the intermediate portion of one side of which are open, as clearly shown in the sectional View Fig. 4. Within the cylindrical member there is secured a tubular member 18, and in the outer portion of the lower end of the tubular member there is formed a bayonet slot 19. Slidably disposed in the lower end of the member 18 is a pin 20, the projecting end of which is formed with a double chisel point 21, engaging with the milling of the head of the screw. In the other end of the member 18 there is secured a transverse pin 22, and within the member 18, and engaging against the pin 22, and against the inner end of the pin 20, is a coil spring 23, the tendency of which is to normally urge the pin 20 out of the member 18. Carried by the pin 20, and playing in the bayonet slot, is a headed finger-piece 24. By grasping this finger piece the pin 20 can be withdrawn into the tubular member whereby said pin can be held out of engagement with the screw head.

It will thus be seen that the double chisel point of the pin 20 will ratchet over the milling of the screw head as the screw is turned, and by the feel of this engagement, by the fingers of the draftsman, as he turns the screw, the distance the screw has been turned in either direction, can be accurately told. Thus, when the screw is turned two notches of the milling in one direction, the draftsman knows how much wider or thicker the line will be, than beforethe screw was turned. This is especially of value in making shade lines, where the lines are successively made thicker or thinner, according to the direction of movement of the angle or square.

The device is extremely simple in construction, and can be quickly and easily applied to the ordinary pen, or removed there from, by simply removing the adjusting screw of the pen.

By reason of the fact that the legs 17 are resilient, the device will be firmly but releasably engaged on the leg or jaw 11 of the pen. It may not be necessary to remove the adjusting screw 12 when applying the de with inturned extremities. adapted for embracing engagement with fone aw of the pen, the pen being provided with a milled V V a tubular member carried in the base and having a bayonet slot in the headed screw,

side at one end thereof, a coil spring disposed in the tubular member, a double chisel carried by pointed pin slidable in the tubular member and engaging with the milled head of the screw, means for holding the spring in en- 15 gagement with the pin, and a fingerpiece the pin and slidable in the said bayonet slot. v

In testimony whereof, I affix my signature, in the presence of'two witnesses.

RALPH L. INGEBRIGTSEN. \Vitnesses:

FRED R. ANGEVINE, EDWARD SIMPKiNs.

Gepiles of this patent may be obtained for five, cents each, by addressing the Commissioner of IPatentsJ Washington, D, G.

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