US1373278A

US1373278A - Pencil

Info

Publication number: US1373278A
Application number: US230800A
Authority: US
Inventors: Frank J Vierling; Kvorning Andrew
Original assignee: Individual
Current assignee: Individual
Priority date: 1918-04-25
Filing date: 1918-04-25
Publication date: 1921-03-29
Anticipated expiration: 1938-03-29

Description

PENCIL. APPLICATION FILED APR.25. 191s.

STATES KVORNING, OF MINNEAPOLIS, MINNESOTA, OF ST. PA'UL, MINNESOTA, CORPORATION PENCIL.

Leraars.

To all whom it my comem:

Beit known that we, FRANK J. VIERLING, a citizen of the United States, and AND-REW KVORNING, a subject of the King of Denmark, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Pencils; and we do hereby declare the following t'o be a full, clear, and exact description of the invention, such as will enable othersskilled in the art to which it ap ertains to make and use the same.

ur invention has for its object to provide an improved pencil, and to this end, it consistsof the novel devices and combinations of devices hereinafter vdescribed and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.'

Referring to the drawings:

Figure 1A is an elevation of pencil;

Fi 2 is an enlarged view of the improved pencil, principally in longitudinal central the improved section;

casing having a contracted -m a slight modi cation; and

longitudinal sec- Fig. 3 is a detail view of the friction device, in section, takenV on the line 3--3 of Fig. 2;

ig. 4 is a detail view of the ball clutch, in section, taken on the line 4-4 of Fig. 2; F i 5 is a detail view, in section, taken on the line 5-5 of Fig. 2;

Fig. 6-is a view corresponding to Fig: 2, with the exception that the lead feeding mechanism is moved into a position to release the cl tch; c

Fig. 7 is alii elevation of the lead holding channel; y 0

Fig. 8 is an elevation of the pencil cap; Fig. 9 is a fragmentary elevation of the point end of the. encil, in section, illustratig. 10 is a fragmentary tion, taken on the line 10--10 of Fig. 9.

rlhe numeral 11 indicates atubular outer lower end or point 12. Secured within Vthe point 12 is an axially locatedlead holding channel or tube .,13,-havinga ,funnel-like upper end. As

secured, at

tube 13 is frictiona ly .its -lower end, to the point 12, by longitudig ,nelly lsplitting said tube,

so ythat in forcing the same into position saidlower end there- Specication of Letters Patent.

Application led April 25, 1918. Serial No.

' in the Patented Mar. 29, 1921.

of is slightly contracted. The rim of the upper end of the tube 18 closely engages the internal Walls of the casing 11 and thereby holds the upper end of said tube against axial movement.

Rigidly but removably secured within the outer casing 11 is an inner casing 14, the lower end of which tightly fits within the funnel-like upper end of the tube 13.

y Mounted in the upper ends of the inner casing 11, with freedom for axial sliding movement, is a plunger head 15, the upper end portion of which is reduced in diameter to afford a shoulder 16. This shoulder 16 engages an inturned flange 17 on the upper end of the inner casing 14 and prevents the plunger head 15 from being withdrawn therefrom. The upper end of the plunger head 15 is made hollow to afford a chamber or receptacle 18 for extra leads Z. The lead point of the pencil is likewise identilied by the letter Z. A cap or finger piece 19 is telescoped onto the reduced upper end of the plunger head 15 and is frictionally held thereon by longitudinally splitting said plunger head so that the same is slightly contracted under the telescoping movement of said cap'thereon.

`Secured to` the lower end of the plunger head 15 is a long tubular push plunger 20, axially located with respect to thetube 13, and affords a guide for an ejector 21 in the form of a long rod, the lower end of which is adapted to enter the tube 13 and impart a step by step movement to the respective lead Z. Near the lower end of the inner casing 14 is a transverse partition 22, having an axial bore through which the ejector 21 works. A coiled sprin 23 encircling the ejector 21 is compressed etween the lower end of the push plun er 20 and partition 22 and normally"` ho ds' the said push plunger, plunger head,^and cap in their uppermost positions. .y l

Steps of movements are imparted tothe ejector 21 under successive downward movements of. .thecap 19 by one-way clutch. This clutchcomprises ball members 24 and ,a cone member 25, which has a slight limited axial movement in` respect to the push plunger 20. Said ball members 24 of the clutch are mounted in radial seats 26, formed 'holder 13 `by inserting the encircling the push plunger 20 is compressed between the upper end of the cone member 25 of the clutch and a collar 28 on said push plunger. The ball members 26 of the clutch are released from the cone member 24 thereof by an annular shoulder 29, pressed from the inner casing 14, between said cone member and the partition 22.

The clutch is so arranged that the initial downward pressure on the cap 19 will cause said clutch to impart a downward step of movement to the ejector 21, and hence to the engaged lead Z. During this initial movement of the cap 19 the spring 27 will cause a common movement of the cone member 25 with the push plunger 20. A further movement of the cap 19 will carry the lower end of the cone member 25 of the clutch into engagement with the shoulder 29.A A still further downward movement of the push plunger 2O will carry the ball members 24 of the Aclutch out of engagement with the cone member 25 thereof, and thereby release the ejector 21. When the cap 19 is released the spring 23 will lift the push plunger 20 and thereby carry the ball members of the clutch into the cone member 25 thereof and return the same to normal position. During the return movement of the push plunger 20 the clutch, of course, will be inoperative and, therefore, the ball members 24 thereof will not grip or hold the ejector 21.

A friction device is provided for holding the ejector 21 during the return movement of the clutch, push plunger and cap to norballs 30 and a transversely split clampin ring 31, which bears upon said balls an yieldingly presses the same onto the ejector 21. he friction balls 30 are mounted in radial seats 32, formed in the reduced upper end of a plug 33, which closes the lower end of the inner casing 14. The upper end of the plug 33 engages the partition 22, which holds the clamping collar 31 against axial movement from said plug. The ejector 21 frl'eely works endwise through a bore in the p ug 33.

From the above description it isevident that the one-way clutch 24-25 securely holds the ejector 21 so that the same actsV as a base of resistance for the-lead Z when writin with the pencil. After the lead is own to the point 12, a downward pressure on the cap 19 will impart a step of movement turn, will impart a step of movement to the engaged lead Z, and thereby slightly project the same outward of new lead may be placed in the tube or same into the point 12 while holding the cap 19 pressed inward so as to release the clutch and thereby permit an inward movement of the to the ejector 21 which, inA

the point 12. AV

1f desired, the cap and inner casing, together with the parts carried thereby, may be removed from the outer casing and a new lead droppedin the upper end of said outer casing and which lead will be directed into the tube 13 by the funnelshaped upper end thereof.

he construction shown in Figs. 9 and 10 is the saine as that shown .in the other figures, with the exception that the friction device comprises a pair of yieldingly pressed fingers 34, which engage opposite sides of the ejector 21 and yieldingly hold said ejector against upward movement under the return movement of the push plunger. As shown, the lingers 34 are formed from the single piece of spring metal having, in its transverse portion, an axial opening for the ejector 21. Opposing shoulders 35, in the inner tube 14, hold the spring fingers 34 against axial movement within said inner casing.

What we claim is:

1. A pencil comprising a casing and a lead feeding device including an ejector, ball clutch means adapted to engage said ejector to move it in one direction, means for releasing said ball clutch and frictional means adapted to hold said ejector against free longitudinal movement.

2. A pencil, a casing, a lead feedin device comprising an ejector adapted to reely engage the butt end. of the marking lead, a ball clutch adapted to engage said ejector to impart a step by step movement by repeated longitudinal movements of said clutch and means for holding said ejector during the inoperative movement of said clutch to allow said clutch to move said ejector and engage at different points, said ejector 21.

clutch being adapted to normally hold said ejector against backward movement in said casing.

3. A pencil, a. casing, a lead ejector rod adapted to constantly engage and form an abutment for the lead 1n said pencil, a clutch adapted to normally engage said rod under spring tension, releasing means adapted to release said clutch from engagement with said rod when said clutch is moved in eXtreme position in one direction and resilient means adapted to engage said rod to hold it against free longitudinal movement.

4. pencil comprising a casin having, at its lower end, a channel for frictionally holding a piece of lead, a push plunger mounted inthe casing, a spring normally holding the push plunger in its uppermost position, a lead ejector mounted in the push plunger with freedomv for endwise movement, a one-way clutch normally holding a friction device for holding the ejector during the return movement of the push plunger.

5. A pencil comprising a casing having, in its lower end, a channel for frictionally holding a piece of lead, a push plunger mounted in the casing, a spring normally holding the .push plunger in its uppermost position, a lead ejector mounted in the push plunger with freedom for endwise movement, a one-way clutch normally holding the ejector against a movement away from the lead and for imparting a variable step of movement thereto under the initial downward movement of the push plunger, means for rendering the clutch inoperative at the limit of the downward movement of the push plunger, and a friction device for holding the ejector during the return movement of the push plunger.

6. A pencll comprising a casing having, at its lower end, a lead holding channel, a push plunger mounted in the casing, a spring normally holding the push plunger in its uppermost position, an ejector mounted in the push plunger with freedom for endwise movement, a one-way clutch in- .cluding a ball member carried by the push plunger, and a cone member having a limited axial movement -in`respect to the push plunger, a spring operative on said cone member to normally hold the ball member ger having a hollow rear end, a ball clutch mounted on the forward end of said plunger, an ejector rod adapted to form an abutment for the marking lead in said pencil, resilient means adapted to hold said clutch under spring tension in engagement with said rod, frictional means adapted to hold said rod against free longitudinal movement and means lfor rendering said clutch inoperative at the limit of its movement in one direction to release said rod and allow the marking lead in said pencil to be moved back into said casing while said clutch is held in its released position.

In testimony whereof We aiiix our Signatures in presence of two Witnesses.

FRANK J. VIE-BLING. ANDREW KVORNING. Witnesses:

HULDA LIEDER, HARRY D'. KILG'ORE.