US836712A

US836712A - Pencil-sharpener.

Info

Publication number: US836712A
Application number: US25374905A
Authority: US
Inventors: Delbert D Rush
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-04-04
Filing date: 1905-04-04
Publication date: 1906-11-27
Anticipated expiration: 1923-11-27

Description

STATES PATENT oEEIo nELBERT o. RUSH, or DULUTH, MINNESOTA.

PENCIL-SHAFVISPENER.

Patented Nov. 27, 1906.

Application filed April 4,1905. Serial No. 253,749.

To all whom it may concern:

Be it known that I, DELBERT D. RUSH, a citizen of the United States, residing at Duluth, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements in Pencil-Sharpeners; and I do hereby declare the following to be a full, clear, and exact descri tion of the invention, such as will enable ot' ers skilled in the art to-which it appertains to make and use the same.

My invention relates to pencil-Sharpeners, and has for its object the provision of a rotary sharpener adapted to be operated by a motor.

It has for a further object the provision of a sharpening-cone which may be easily opened to discharge broken leads or other refuse.

therefrom.

It has for a further object the provision of motor-governin means ada ted to be 0 eraatedby a' pencil when sai pencil is t ust into the sharpening-cone.

With these and other objects in view it con sists of a motor, .a sharpening-cone mounted on said motor, means for driving said motor, and governing means adapted to control the supp y of power to said motor.

It also consists of certain other constructions, combinations, and arrangements of parts hereinafter described and claimed.

In the drawings, Figure 1 is a vertical transverse central section, partly in diagram, through my said invention. Fig. 2 is a perspective view, partly broken away, of a portlon of the motor-shaft and of the head and sharpening-cone mounted thereon. Fi 3 is a horizontal section of said head ands arpening-cone on the line ab of Fig. 1, omitting the parts below the line 0. -d of said Fig. 1.

In said drawings, 1 is a casing or box having the lid 2 hinged thereto in any suitable manner, as at 2 Said box is horizontally divided into an upper and lower com artment A and B, respectively, by a partition as 3. Said upper compartment is divide into two compartments A and G, respectively, by a shelving-partition 4, having the vertical extension 4. A drawer 5 is inserted through the wall of said box into the com- C, is a motor 7 of any suitable construction and driven by any suitable power derived from any suitable source; but 1 preferably use an electric motor. Said motor is provided with a rotary shaft 7 which is projected through said partition 3 and preferably through the compartment C and the partition 4 and is provided at its -u per end with a head or holder 8, secured t ereto in any suitable manner. Said head is eccentrically recessed in its upper end, as at 8, said recess connecting with an eccentric aperture penetrating the lower face of said head, as at 8. Positioned within said recess and extending above said head and axially alined with said shaft is a hollow, split, or longitudinally-divided rotary sharpening-cone comprising the parts 9 and 10, respectively. Said part 9 is rigidly secured to said head in any suitable manner, as by the screws 9, extending through the side of said head and into the wall of said cone. The opposite part 10 of said cone is pivoted at its upper end, as at 10*, to a suitable stanchion or post '11, erected on or formin art of-said head. A finger-hold 10 is forme upon said member 10 for the purpose of opening said member against the action of the spring 12 to permit dust or broken points to esca e from said cone through the aperture 8*. ithin said recess is secured a spring 12, adaptedto bear against the side of said part 10 and hold said cart in operative position against said part 9.

he tension of said spring may be adjusted by a set-screw 13, projected through the wall of said head and bearing against the spring, intermediate of the ends thereof. The edges of the cone do not, however, meet on one side thereof, but a space 10 is provided between them for the escape of shavings and for the passage into said cone of the cutting'edge of a knife 14, which knife is secured in any suitable manner to said part 9., as by screws 14,

projected through the sides of said knife into a' shoulder 9*, formed on said part 9. Said cone is referably apertured at the a ex, as at 10 to rther facilitate the escape o dust. Upon the inner face of said cover I mount in suitable bearings, as 15, securedthereto, a slidin rod or pin 15, which is normally held in retracted position by any suitable elastic or spring device, as by the spring 15". When in such retracted position, said pin is adapted to project slightly over the mouth or upper end of said cone and is preferably provided at such projecting end With-a beveled head 15.

Said pin in operative position is adapted, directly or indirectly, to cause the flow of power from a suitable source to said motor and in 'thereu on revolve, said knife revolving retracted position to directly or indirectly cause the interruption of said flow. ThlS may be done in any suitable manner; but when an electric motor is used I preferably make said pin one of the oles of the normally open circuit controllmg contact of an electric circuit includin said motor and any suitable source of electricity, as a battery 16, or instead of said battery a near or distant dy namo or otherwise. The other pole 15 of said normally open contact is preferably rigidly secured to said lid. Insulation members, as 15, may be inserted wherever necessary or desired. Formed in'said lid in vertical registration with the mouth of said cone is an aperture 18, adapted to permit the passage of a pencil 19 to said cone. A verticall .arranged wall or neck 18 may, if desired, e formed or erected on said lid around said aperture 18, to guide said pencil. The back of said case is preferably provided with-a door 19 hinged to said case in any suitable manner, as at 19, to give easy access to the motor, and, if there be one in the casing, to the said battery. In operation the encil to be sharpened is dipped into said nec i and thrust down into said cone in much the same manner that a pen is dipped. into an ink-well. In its downward passage it forces the powersu ly valve into operative position and ho s it so. The motor-shaft, head, and cone aroun said pencil and forming a point thereon. The pencil-shavings escape from the cone through the space 10 and fall into said drawer or on said shelving -partition '4, whence they drop into said drawer. Suitable stuffing-boxes (not shown) may, if desired, be inserted in or on the partitions 3 and 4; around said shaft to prevent passage of dust to compartments C and B, but are not considered essential.

While I have described certain forms of construction, it is obvious that the same may be modified or altered in many details without departing from the spirit and scope ofmy said invention.

Having now described my invention, what I claim, and desire to secure by Letters Patent, is

l. The combination with a rotary support of a hollow longitudinallydivided cone mounted thereon in axial alinement therewith, one of the halves of said cone being rigidly fixed to said sup ort and the other of said halves being pivota ly secured at its upper end to said su port, means adapted in o eration to hold t e lower end of the pivoted half of said cone in close relation with the lower end of the opposite side of said cone.

2. In a pencil-sharpener the combination of a longitudinally-divided hollow cone having an elongated aperture or knife-passage formed in the wall thereof, a holder for said cone having a recess formed in one end adapted to receive the apex of said cone, said recess being greater in one transverse diameter than the portion of the cone received by it, one side of said cone being rigidly secured to said holder, and the other side of said cone being pivotall connected at its upper end, its lower end eing adapted to swing away from the lower end of the op osite sald half, a spring adapted to keep the ower end of the pivote portion of said cone 1n close relation to the lower end of the fixed portion thereof, and a knife-blade provided with a cutti 1g edge extending through said knifeassago, said holder having a passage, forme therein extending from said recess through the lower end of said holder, and said pivoted portion of said cone being provided with means by which it may be swung on its pivot against the action of said s ring.

3. In a pencil-s arpener, a casing including two compartments, one of said compart ments contalninga motor and the other of said compartments containing -a sharpening device driven by said motor, a drawer in the second said compartment, the second said compartment containing an inclined or shelvin partition overhangin' the inner end of said drawer and adapts to discharge into said drawer shavings and dust escaplng from said sharpening device toward the back of" said casing, substantiallty as described.

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

' DELBERT D. RUSH. Witnesses: f I

Janns T. Warson, WELLINGTON M. BLEwn'r'r.