US1428077A - Pencil - Google Patents

Description

H. A. CLARK.

PENCIL.

APPLICATION FILED JUNE 30, 1921.

Patented Sept.

mam?

w/r/vsssm Arm/mm ceases ept. s, 1922.

HARRY ADAM CLARK, OF\DETROIT, MICHIGAN.

PENCIL.

Application filed June 30, 1921.

To all whom it may concern:

Be it known that I, HARRY ADAM CLARK, a citizen of the United States, and a resident of Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Pencils, of which the following isa specification.

My invention relates to pencils and the purpose of my invention is the provision of a pencil of extremely simple, light, and durable construction so formed as to'accommodate sticks of lead which are adjustable to provide points at the opposite ends of the pencil and which are capable of being locked in any adjusted position. Furthermore, my invention provides a novel construction of pencil body, feeding means for the lead, and sleeves coacting with the pencil body to effect a locking of the lead agains the action of the feeding means.

I will describe one form of pencil embodying my invention and will then point out the novel features thereof in claims.

In the accompanying drawings:

Figure 1 is a view showing in side elevation one form of pencil embodying my invention.

Figure 2 is a view similar to Figure 1 and taken at right angles to the latter.

Figure 3 is a fragmentary sectional view of the pencil shown in Figures 1 and 2.

Figures 4, 5 and 6 are transverse sectional views taken on the lines 44, 55 and 6-6, respectively.

Figure 7 is a detailed perspective view of one of the feeding members embodied in the pencil.

Similar reference characters refer to similar parts in each of the several views.

Referring specifically to the drawings, my invention in its present embodiment comprises a pencil bod formed of some light metal such as aluminum and made up of a pair of companion members designated at M and M. These members are formed with flat intermediate portions 15 and 15, respectively, which are provided with threaded openings to receive a screw 16 for locking the two sections together. -As shown in Figure 3, the confrontin sides of the members M and M are recesse longitudinally to provide lead receiving channels 17 and 17*. As shown in Figure 1 the channels 17 and 17 extend from flat intermediate portions to and through conical terminal portions 18 and 1 8 respectively, with the latter being Serial No. 481,720.

threaded exteriorly to receive a locking sleeve 19 or 19*. As shown in Figures 1 and 5, the members M and M are formed at regular intervals with notches 20 adapted to receive locking lugs 21 carried by a lead adjusting element L. As shown in Figure 1, two lead adjusting elements L and L are provided, one for each of the channels 17 and 17 and as shown in Figure 3 each element is adapted to slide between the members for effecting the projection of a stick of lead. As shown in Figure 7, each element L or L comprises a shank 22 disposed at right angles to the bar 23. The opposite ends of the bar 23 and the opposite edges of the shank 22 are notched to receive a spring 24, with the notches of the shank receiving the opposite ends of the spring as clearly shown. The lugs 21 are formed on the shank 22, and the free end of the latter is enlarged to provide a handle 25 by means of which the element as a unit is operated to cause the lugs to engage or disengage the notches 20. The shank 22 is movable with respect to the bar 23 but is normally urged into contact with the bar by means of the spring 24.

In the applied position of the element L or L between the companion'members M and M as shown in Figure 3, the bar 23 is slidably fitted within the channel 17 or l7 with the handle 25 projecting from the side of -the pencil so as to be readily manipulated. When the lugs 21 are within any pair of notches 20, the element as a Whole is locked against longitudinal movement Within the pencil. Accidental movement of the element is prevented by virtue of the fact that the spring 24 serves to maintain the shank 22 in contact with the bar 23 so that the lugs are retained within the notches. When it is desired to move the element in one direction or the other, the. shank is pulled outwardly by the handle 25 and against the action of the spring 24 until the lugs are removed from the notches where upon the bar 23 is free to be moved' longitudinally.

As shown in Figure 6, the confronting sides of the flat portions 15 and 15 are formed with ribs and notches as indicated at 26 so as to prevent lateral displacement of one member with respect to the other when the screw is in applied position. As shown in Figure 5, the cross sectional contour of the pencil body from the flattened portions to their free ends is of polygonal shape for the purpose of preventing the rolling off the pencil on a desk or the like.

' channels 17 and 17 As shown in this same figure, the members M and M are so formed and connected as to provide slots upon opposite sides of the channels 1'? and 17 andas shown in Figure 3 a portion of the spring 2& and the shank 22 are adapted to be moved within the slots. By virtue of these slots, the members are normally spaced apart to allow of the sliding movement of sticks of lead within the However, when it is desired tolock the sticks of lead against movement, the locking sleeves are screwed inwardly upon the . conical portions 18 and 18 thereby forcing the members to ether so as to snugly embrace thesticks 0 lead and thereby lock the latter against movement.

In practice, a stick of soft lead is placed within one channel and a stick of hard lead is placed within the other channel with the inner ends of the lead abutting the bars 23. By this arrangement it will be seen that an outward adjustment of the elements L and L effects an outward movement of the sticks of lead so that any portion of the sticks can be made to project from the opposite ends of the pencil body. Subsequent to this adjustment the sticks are locked in the projected position by means of the locking sleeves 19 and 19 in the manner previously described.

My invention is particularly designed as a draftsmans pencil, with the two projected ends of the two strips of lead permitting of the forming of different points, and the different degrees of hardness of the lead permitting of their different uses. The polygonal shape of the pencil body prevents rolling of the pencil on the drafting board. It will be understood that by moving the locking sleeves to released position permits of the projection of the sticks of lead to, facilitate their sharpening.

vide a lead receiving channel, slots com municating with the channel, and notches adjacent the slots, said members being secured together so that the lead receiving channel is normally expanded to allow of an adjustment of the lead within the channel, means for contracting the members toefiect a constriction of the channel, and

means movable within said channel and said slots for projecting and limiting the inward movement of the lead within the channel, said last means comprising a bar slidable within the channel, a shank within one of the slots and projecting from the side of the body, lugs formed on the shank, and a spring embracing the bar and normally urging the shank so that said lugs will be disposed within said notches.

2. A pencil comprising a body composed of companion members so formed as to provide a lead receiving channel, slots between the members, notchesadjacent the slots, said members having semi-conical outer ends and secured together in such manner that ,the channel is, normally expanded to allow of the adjustment of lead therein, a sleeve threadedly engaging the conical ends for contracting the members to effect a constriction of the channel, and a lead adjusting element movable within said slots and channel and including lugs normally engaging within said notches to eifecta locking of the element.

HARRY ADAM CLARK.

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