US2181285A

US2181285A - Pencil sharpener

Info

Publication number: US2181285A
Application number: US217140A
Authority: US
Inventors: Schuler John George
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-07-02
Filing date: 1938-07-02
Publication date: 1939-11-28
Anticipated expiration: 1956-11-28

Description

Nov. 2& 1939. J. G. SCHULER 2.181285 PENCIL SHARPENER Filed July 2, 195a 2 Sheets-Sheet 1 mum.

2 Sheets-Shet 2 grvue/wbob J. G. SCHULER PENCIL SHARPENER Filed July 2, 1938 1 Nov. 28, 1939.

Patented Nov. 28, 1939 UNITED STATES PATENT OFFICE.

PENCIL SHARPENER John George Schuler, Dutton, Mont.-

Application July 2, 1938, Serial No. 217,140

21 Claims.

This invention relates to pencil sharpeners and has for its object to provide a device which will sharpen a pencil to an exact fineness of point desired and Without danger of breaking the lead.

Another object of the invention is to provide a pencil sharpener which will very rapidly sharpen a pencil with little or no manual effort.

Another object of the invention is to provide in a pencil sharpener an abrasive material Which the pencil is sharpened.

with

A further object of the invention is to provide,

in a pencil sharpener, means whereby the p encil point may be seen in order that the exact desired point may be had.

A further object of the invention is to provide in a pencil sharpener a cone-shaped grinding stone for sharpening the pencil.

A still further object of the invention is to provide, in a pencil sharpener a sharpening ment which revolves around a pencil end in fixed position.

Another object of the invention is to provide in a pencil sharpener, means for holding a ele held pencil in fixed vertical position while being sharpened.

A further object of the invention is to provide, in a pencil sharpener means for gradually moving one end of a pencil toward the sharpening element.

Another object of the invention is to provide in a pencil sharpener a turn-table carrying a sharpening element.

A further object of the invention is to provide in a pencil sharpener a driving element, a turntable for carrying a sharpener element, a p

holding element, a plurality of compartments for encil the several elements, a housing for said compartments and means whereby all of said elements and compartments may be plainly visible prothat

a plurality of windows are provided in the sharpener housing in order that school children may clearly see the operation of all of the elements and thus impress upon their minds certain movements and operations embraced in theinvention.

With the above and such other objects .in View as may hereinafter more fully appear I have invented the device shown in, the accompanying encil Figure 2 is a vertical sectional view thereof; Figure 3 is a section on line 3-3 of Figure 1; Figure 4 is a section on line 44 of Figure 2;

Figure 5 is an'enlarged detail view of a pencil holding device;

Figure 6 is a view, similar to Figure 2, showing a modification;

Figure 7 is a section on line 1-1 thereof; and

Figure 8 is a detail view, partly in section, of a conductor staff.

Like reference characters indicate like parts throughout the following specification and in the several views in the drawings in which I indicates a pencil sharpener embodying one form of my invention. The device includes a base 2 upon which is mounted a housing 3, and within which is a drawer 4 for collecting parings from pencils sharpened by the device. center of the top wall 5 of base 2 is a bearing 6 within which the lower end '1 of a vertical shaft 8 is rotatably mounted. This shaft projects rotatably through the top wall 9 of the compartment It! for driving mechanism of the sharpener, and fixedly through a turntable H and fixed to the top platform I2 carried by and spaced apart from the turntable by spaced apart side walls I3 and It. The said driving mechanism consists of a bevel gear I5 keyed to said shaft 8, which is in mesh with a bevel gear l6 mounted on the inner end ll of a drive shaft l8 supported by a hous- I'ng l9 adjacent its inner end and the housing 3 at its outer end which latter end terminates in a crank handle 20 the turning of which drives said gearsand through them the shaft 8, and the turntable ll fixed thereto.

Supported on the inner surface 2| of the housing 3 is a ring gear 22 between said inner surface and the turntable, which is of sumciently smaller diameter than the wall 9, or diameter of the housing, to permit room for said gear. Meshed with the ring gear is a gear 23, mounted upon a shaft 24 supported upon

bearings

25 and 23 mounted upon said turntable II. Keyed to shaft 24, is a V-rimmed wheel 2'! driving a belt 28 which runs through the platform [2 and threaded over V-pulley 29 mounted upon a shaft 30 supported by bearings 3| and 32 and having fixed to Mountedon the exact its inner end 33 a conically shaped abrasive wheel 34 the apex 35 of which is exactly on a vertical line with the upper end 36 of shaft 8. The rotation of the turntable revolves said aplex around said vertical or axial line. Spaced above the grinder 34 isa horizontal wall 3'! separating the turntable compartment 38 from the upper compartment .39 of the device. In the latter compartment is fixedly mounted a vertical semicylindrical jaw member 40, alining with a similarly shaped movable jaw member 4|, the passage 42 between said jaws alining with an opening 43 in the center of the top wall 44 of said housing 3. The movable jaw 4| is fixedly carried on a pin or bar 45 movably supported in two alining horizontally disposed apertures 46 and 41 in spaced

uprights

48 and 49. Springs 50 and 5| also supported in said uprights bear against the jaw 4|, and normally urge it toward the member 40 in order that when a pencil 52 is pressed down through the passage 42 until its lower end 53 is in proper position against the abrasive member 34. The proper position of the pencil end may be clearly seen through window 54 of compartment 38. When crank 20 is turned, causing turntable H to rotate the gear 23 operating upon the fixed ring gear 22 drives the shaft 24 and with it the pulley wheel 21, belt 28, wheel 29, shaft 36 and abrasive element 34 which grinds off the pencil, both wood and lead to a proper or desired tape-r, said element 34 revolving around the pencil and through the action of said turntable. Windows 55, 56 and 57 are provided in the housing wall, in various positions, and compartments of the device in order that all of its operating mechanism may be clearly seen from the outside and without removing the housing, which housing may be formed in sections as at 68, if desired, in order to facilitate assembly of the device.

In Figure 6 I show a modification of the invention whereby it may be electrically operated. In this form of the device the shaft 64 has

copper contact collars

65 and 66 engaged by brushes 6'! and 68 from which

wires

69 and 16 lead to the switch H. The

collars

65 and 66 are connected through wires 12 and 13 to the electric motor 14 which drives shaft 15 on the inner end of which is abrasive grinding wheel 16 and on the other end of which is a gear ll operating upon the ring gear 18. The upper end 19 of shaft 64 is fixed to the turntable so that the rotation of the turntable through gears 11 and 18 rotates shaft 64. The shaft 15 is either the shaft of the motor 14 or an extension thereof.

Having now described my invention that which I claim to be new, and desire to procure by Letters Patent is:

1. In a pencil sharpener an abrasive element revoluble around a pencil end and. a turntable carrying said element and a motor on said turntable for driving said element.

2. In a pencil sharpener an abrasive element revoluble around a pencil end and a turntable carrying said element and a motor an said turntable for driving said element, and means for revolving said table.

3. In a pencil sharpener an abrasive element revoluble around a pencil end, a turntable carrying said element, means for revolving said table and a vertical shaft upon which said table is mounted.

4. In a pencil sharpener an abrasive element revoluble around a pencil end, a turntable carrying said element, means for revolving said table and a vertical shaft upon which said table is mounted, said element being rotatable.

5. In a pencil sharpener an abrasive element revoluble around a pencil end, a turntable carrying said element, means for revolving said table and a vertical shaft upon which said table is mounted, said element being rotatable, and means for rotating said element.

6. In a pencil. sharpening'device an abrasive element revoluble around a pencil end, a turntable carrying said element, means for revolving said table, a vertical shaft upon which said table is mounted, said element being rotatable, and means for rotating said element, said rotating means being driven through said revolving means.

'7. The device, as claimed in claim 6, said rotating means being carried partly by said turntable.

8. The device, as claimed in claim 6, said rotating means being carried partly by said turntable, and a housing for said device partly carrying said last means.

9. The device, as claimed in claim 6, said rotating means being carried partly by said turntable,

a housing for said device partly carrying said last means, and means for centering a pencil end over said shaft.

10. In a pencil sharpening device an abrasive element revoluble around a pencil end, a turntable carrying said element, means for revolving said table, a vertical shaft upon which said table is mounted, said element being rotatable, means for rotating said element, said rotating means eing driven through said revolving means, said rotating means being carried partly by said turntable, a housing for said device partly carrying said last means, and means for substantially centering a pencil end over said shaft, said last means consisting of a pair of jaws.

11. The device, as claimed in claim 10, one of said jaws being spring actuated.

12. The device, as claimed in claim 10, one of said jaws being spring actuated, said drive means being electrically operated.

13. In a pencil sharpener a cone-shaped abrasive wheel, means for revolving said wheel around a pencil, and means for rotating said wheel, said first means including a turntable.

14. In a pencil sharpener a cone-shaped abrasive Wheel, means for revolving said wheel around a pencil end, means for rotating said wheel, said first means including a turntable, and a fixed ring gear.

15. In a pencil sharpener a cone-shaped abrasive wheel, means for revolving said wheel around a pencil end, means for rotating said wheel, said first means including a turntable, a fixed ring gear, and a traveling gear meshed with the first gear.

16. In a pencil sharpener a cone-shaped abrasive wheel, means for revolving said wheel around a pencil end, means for rotating said wheel, said first means including a turntable, a fixed ring gear, a traveling gear meshed with the first gear, and an electric motor for driving said traveling gear.

17. In a pencil sharpener, a conical abrasive wheel revoluble around a pencil end, a turntable carrying said wheel, and means whereby the rotation of said turntable will cause the operation of said wheel.

18. In a pencil sharpener, a conical abrasive wheel revoluble around a pencil end, a turntable carrying said wheel, and means whereby the rotation of said turntable will cause the operation of said wheel, said means including a housing, a ring gear carried on the housing, a shaft and a bevel gear on the turntable and meshed with the first gear.

19. In a pencil sharpener a cone-shaped abrasive wheel, means for revolving said wheel around a pencil end, means for rotating said wheel, said first means including a turntable, a fixed ring gear, a traveling gear meshed with the first gear, and means for driving said traveling gear.

20. In a device as described a pencil holder, av turntable, and a housing therefor, a ring gear turntable, and a housing therefor, a ring gear fixed fixed on the housing, an abrasive mounted upon on the housing, an abrasive mounted upon a shaft a shaft and a bevel gear on the shaft for operaand a bevel gear on the shaft for operation by tion by the ring gear said shaft being carried by 5 the ring gear said shaft being carried by the the turntable, and means whereby the turn table 5 turntable. may be revo1ved.

21. In a device as described a pencil holder, a JOHN GEORGE SCHULER.