US508417A - Addition-pencil - Google Patents

Description

y(No Model.)

A. M. GrRUBBS. ADDITION PENCIL.

No. 508,417. Patented Nov. 14. 1893.

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ALBERT M. GRUBBS, OF FOREST GROVE, OREGON.

ADDITION-PENCIL.

SPECIFICATION forming part of Letters Patent No. 508,417, dated November 14, 1893.

Application led February 11, 1893. Serial No.- 4611902- (No model.)

To @ZZ whom t may concern:

Be it known that I, ALBERT M. GRUBBs, a citizen of the United States of America, residing at Forest Grove, in the county of Washlngton and State of Oregon, have invented certain new and useful Improvemcntsiu Addition-Pencils; 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 apportains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

- The object of thisinvention is to provide a pencil-holder which consists of two parts connected to each other and provided with mechanism whereby when the point of the pencil is pushed upon, or the body-ot the handle depressed, and the part carrying the pencil held rigid, such movement will cause a register-bar to be projected a single step or space; said spaces being numbered so that counting can be done rapidly and accurately.

The invention is designed more especially as an improvement upon that class of addition pencils shown in the patent of C. R. Thompson, No. 356,561, dated January 25, 1887.

In thel accompanying drawings, Figure l is a longitudinal sectional view.k Fig. 2 is a sectional view on the line2-2 of Fig. l. Fig. 3 is a sectional view on the line 3 3. Fig. 4 is a perspective View' of the counting mechanism detached. Fig. 5 shows side views of the register-bar.

A designates a tube or casing, which is provided at its upper end with a slot a, through which the register-bar passes, and with a side aperture a', through which passes a lug d on the ratchet-bar D to hold said ratchet-bar against longitudinal movement in the casing.

B designates ashort tube which carries the pencil B', and this tube is movable Within the tube A, which movement is limited by the pin b which is fixed in the tube A and passes through slots in the tube B. To this penciltube B is pivoted at cLL a ratchet-bar O, which extends to near the upper end of the tube A, and this ratchet-bar O is provided above the pencil-tube B, and on each side, with outwardly projecting lugs c, which bear against the tube A, and, with the lugs c near the up- Athe upper end of the tube or casing A and against the lugs c formed on the ratchet-bar C, so as to operate said ratchet-bar in the direction to thrust out the pencil-carrying tube B, as shown in Fig. 1.

By the construction hereinbefore described it will be noted that I provide two ratchetbars, one of which D, is permitted to have a slight lateral movement but is held against longitudinal movement in the casing bythe lug d while the other C moves or slides over the same; thus every time the pencil is depressed, or the pencil-tube forced into the casing, the ratchet-bar C which is attached to said pencil-tube will be moved upward'a distance slightly greater than the lengthof, one ot the ratchet teeth, andafter this movement has been made and pressure upon the pencil released the spring E will cause the ratchet-bar C and pencil-tube to resume their normal positions, the movement of the barC carrying with it the register-bar hereinafter described.

' F designates the registerbar, which is spaced and numbered to correspond with the number of teeth Von the ratchet-bars, and this register-bar passes through the upper end of the casing A, and at its lower end is provided with projections fand f', which engage the teeth of the ratchet-bars. On one side of the register-bar the spaces may be numbered l, 2, 3, &c.,to be used in counting one at a time while on the other side they may be numbered 2, 4, G, duc., for counting two at a time, as shown in Fig. 5.

In operation, when it is desired to count it is only necessary to bear upon the point of the pencil and then release the pressure, when the register-bar will be projected one step or tooth beyond the casing A by means of the IOO ratchetebar C engaging the lugf, and will be retained in this position by the projection f engaging the teeth of the ratchet bar D; the ratchet-bar being moved to one side when the projection f rides on the teeth and said teeth caused to engage the projection by means of a flat spring f2 which is attached to the ratchet-bar C and bears against the lower end of the ratchet-bar D. It will be seen that when it is desired to return the register-bar within the casing it is only necessary to press upon the lug (Z on the bar D which will move the teeth ot said bar out of engagement with the projection f of the register-bar, and the straight edge of the bar D will be moved against the projection f of the registenbar to throw the same out of engagement with the teeth of the bar C; thus permitting said register-bar to slide down, as the straight edge of each ratchet-bar will then be on a line with the outer ends of the teeth of the adjacent ratchet-bar and will prevent the lu gs fand f engaging said teeth.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, isv l. I n an addition or counting pencil, the combination, oi a tube or casing inclosing two ratchet-bars one of which has a limited longitudinal movement within the casing while the other is held against such movement by a lug which is attached to the lower portion of one of the ratchet-bars and projects through an aperture in said casing, and a register-bar having projections which are engaged by the teeth of the ratchet bars, substantially as shown, and for the purpose set forth.

2. In an addition or counting pencil, the combination, of a tube or casing inclosing two ratchet-bars one of which has a longitudinal movement within the casing while the other is held against such movement by a lug which is attached to the lower portion of one of the ratchet-bars and projects through au aperture in said casing, a register-bar having projections which are engaged by the teeth of the ratchet-bars, the casing being provided with a slot through which said register bar passes, and a spring bearing against the longitudinally movable ratchet-bar to force the same to the limit of its movement in one direction, substantially as shown, and for the purpose set forth.

3. In an addition or counting pencil, the combination, of a casing, a movable penciltube, a spring depressed ratchet-bar carried by the pencil-tube, a ratchet-bai' D provided with a lugd which projects through an aperture in the casing to prevent longitudinal movement of said ratchet-bar D, and a register bar adapted to engage with the teeth of the ratchet-bars, substantially as shown, and tor the purpose set forth.

4. In combination with a casing A and tube B movably connected to each other, a ratchetbar C secured to the tube B to move therewith, a regster-bar which is engaged by the teeth of the ratcliet-bar C and engages with the teeth ot' a ratcliet-bar D held within the casing against longitudinal movement, and a spring E which acts upon the ratchet-bar C to restore it to its normal position, substautially as shown, and for the purpose set forth.

5. In combination with a casing A and tube B sliding therein, a ratchet-bar C located within the casing A and attached to the tube B so as to move therewith, aspriug t'orthrowing the ratchet bar C in one direction, a ratchet-bar D located within the casing and held against longitudinal movement by a lug d which projects through an aperture iu the casing A, together with a register-bar which projects through an aperture in the casing and is provided with lugs which are engaged by the ratchet-bars, and a spring forthrowiug the ratchet-bar D iu engagement with the register-bar, substantially as shown, and for the purpose set forth.

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

ALBERT M. GRUBBS. Witnesses:

A. E. WILSON, C. L. LARGE.

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