US1722771A - Pencil holder for sharpeners - Google Patents

Description

y 1929. c. c. SPENGLER 1,722,771

PENCIL HOLDER FOR SHARPENERS Filed Aug. 20, 1926 2 Sheets-Sheet l July 30, 1929. c. c. SPENGLER 1,722,771

PENCIL HOLDER FOR SHARPENERS Filed Aug. 20, 1926 2 Sheets-Sheet 2' f7zoe zzarf C/mrsa 65,06 2

Patented July 30, 1929.

UNITED. STATES y 1,722,771 PATENT OFFICE.

OEABIZES G. SPENGLEB, OF, ROCKFORD, ILLINOIS, ASSIGNOR TO SPENGIIEB-IIOOKIS MANUFAOTUBLNG 60., O1! CHICAGO, ILLINOIS, A. CORPORATION OI NEW YORK.

PENCIL HOLDER FOB SHARPENEQS.

Application filed. August 20, 1926. Serial No. 80,397.

This invention relates to pencil holding devices employed in connection with pencil Sharpeners.

Heretofore in encil Sharpeners of this general type, it has can the practice to provlde gripping jaws which are controlled manually for holding the pencil; that is, by posltlve actuation employing levers or similar elements.

This necessitated complicated construction and further, the necessity of unhandy manipulation on the part of the operator.

It is the object of my invention to provide a simple and efiective gripping means for holding a pencil while it is being fed into the cutting devices in the process of sharpening the same.

Another object is to eliminate the manual control feature and provide a set of gripping jaws which are actuated by the inserted pen oil and which operate elfeotively entirely by the engagement with the end of the pencil when the pencil is thrust into the holding device.

Another object is to provide a set of gripping jaws for a pencil holder which will always maintain the pencil centered regardless of the size of the pencil and thus present the end portion in a proper position to be enga ed by the cutting blades.

bjects of my invention are accomplished preferably by the structures disclosed in the accompanying drawings, in which like reference characters representcorrespondingparts, and in which Figure 1 is aside elevation showing a manually operated pencil sharpener, comprising a casing containlng the cutting apparatus and automatic holding and feeding device;

Figure 2 is a side elevation, partly in crosssection, showing the holding and feeding mechanism, the internal construction being shown in dotted lines;

Figure 3 is a cross-sectional view taken on line 3*-3'* of Figure 2;

Figure 4 is a detail showing, artly in crosssect-ion, taken on line 4 4* of igure 1 Figure 5 is a side elevation of a sharpener similar to that shown in Figure 1 with a stationary casing for the gripping jaws, the automatic feed being dispensed with;

Figure 6 is an end elevation of the form shown in Figure 5 as seen from the left;

Figure 7 is a cross-sectional view of the holding mechanism taken on line 7*7" of Figure 5;

Figure 8 is a cross-sectional view of Figure 7 talren on line 8*-8"; and

Figure 9 is a view similar to Figure 8 but showlng the inner member of the holder made of a; stampmg of sheet metal instead of being cas Referring to the drawings, 1 represents a base plate; 2 indicates generally a conventlonal type of sharpening mechanism containmg cutting blades and having a handle t) for manual operation. In the form shown In Figures 1 to 4 inclusive, which embodies an automatic feed, the base plate 1 is provlded with an upturned end 5 forming a supportfor a tubular extension 6 and the outer end of supporting rod 7, which rod is shown 1n Flgure 2 disposed centrally within the tube 6. The tube 6 forms a sliding bearing support for the cylindrical member 8 which together with the rod 7 and the depending arm 9, the end of which is adapted to slide in a slot 11, form a carriage for the feeding mechanism designated generally at 10. Elements 6 and 7 are telescopically arranged and are adapted to contain a coiled spring 12 WhlCh exerts a force tending to hold the feedingmechanism in the right hand position shown in Figure 1. The carriage is held in assembled relation by the rod 7 which is inserted from the left, as shown in Figure 1, and is held by screw-threaded engagement with the adjacent end of the casing of the cutting mechanism.

In the form shown in Figures 5 to 9 inclusive, the automatic feed has been dispensed with, the holder being mounted directly on the housing of the cutter,and the feeding of the pencil is accomplished by manual thrust applied by the operator to cause the pencil to slip through the jaws.

All of the features of my invention are the same, however, whether applied with or without the automatic feed, the only difference residing in the positioning of the holder relative to the cutter casing, the eccentric pencil opening being at the side when applied with the automatic type and at the top in the other modification.

' The cutter housing may be made in several ways as shown in the various figures, Figure 3 showing a cast frame member for the parts with a disc plate closing the assembly. In Figures 7 and 8, a cast frame is likewise shown but having a cover which completely encloses same thereby eliminating the neces- 110 sity of polishing the sides of the casting, the cover in this instance being made of stamped metal. In Figure 9, the arrangement'is similar to Figure 8 but the frame member is also of stamped metal and is entirely enclosed by a stamped metal cover plate.

My invention relates especially to the holding device which is shown in detail in Figures 3 and 4, 7 and 8,-and 9, and which will now be described. Two cooperating members 13 and 14 which may be made in any of the above described forms, constitute a casing which contains the holding mechanism. These parts are held together with suitable screws 15' and are provided with perforations therethrough in alignment with the receiving opening in the casing for the cutting mechanism. This ermits a pencil when inserted between the jaws to be properly fed into the sharpener upon movement of the carriage to the right in the automatic feed type or to permit the pencil to slip when thrust into engagement in the other type. Disposed within the casing portion 14, ribs 16 are provided which form a guideway for sliding jaws 17 The jaws provided in the invention as shown are each made of a single piece of metal bent to form a receiving funnel into which the pencil is placed and by which it is guided into aligned relation with the cutting blade.

The other end of the jaw members form rectangular plates 26 which constitute slide blocks vertically movable in the guideway provided by ribs 16. The j awsare normally held closed by spring 18 through the action of levers 19 and 20 which bear on the small horizontal bearing surfaces 21 of the jaw members, and the expanding effort of the spring acts in opposite directions, all of which causes the jaws to approach each other. Levers 19 and 20 are preferably formed with offset arms 22 and 23 which are adapted to oooperate with sliding engagement whereby simultaneous movement of equal amount is assured thus providing yielding means for the jaws but maintaining the center of the funnel always in proper alignment. The cooperative engagement is accomplished preferably by providing a rounded end 24 and an elongated slot 25 such as shown in Figure 4;. The ends of the levers are provided with enlarged heads which have a dual function; first, to engage by edge contact the bearing portion 21 of the jaws, and secondly, to engage with relatively large surface contact on opposite sides of the guide blocks the jaw elements and the inner surface of the casing element 13 so as to completely fill the space between these surfaces in the casing and thereby prevent any tilting of the guide plates causing the jaws to always maintain a proper position and eliminating all tendency to bind .in their movement.

This last feature is of great importance inasmuch as the spreading of the jaws is to contact the inclined sides of the funnel.

To operate the automatic feed type, the operator grasps the casing 10 of the feeding mechanism in any convenient manner and moves the same to the left against. the tension of the spring 12, as shown in Figure 1. The

pencil is then inserted into the funnel-shaped extension of the jaws where it causes by wedging action the jaws to spread an amount sufficient to allow the pencil to pass and approach the casing 2, in position to be engaged by the cutting blade. When this is done, the pencil is firmly held in position by the action of the spring 18 and levers 19 and 20 and then the spring 12 exerts its force through the carriage and gripping jaws to the pencil to cause the pencil to be fed against the blades in the proper method.

To operate the type disclosed in Figures 5 to 9 inclusive, the operator merely thrusts the pencil in the funnel receiving members and between the jaws, the jaws acting to maintain the pencil in proper alignment to contact the cutting blades. During the cutting operation, the operator continues to thrust the pencil inwardly causing the pencil to slip in the jaws at the rate permitted by the removal of material by the cutting process.

It is my intention to coverall modifications of the invention falling within the spirit and scope of the following claims.

I claim:

1. In a pencil holding devicefa casing comprising two cooperating members having perforations therethrough adapted to be aligned with a cutting tool, one of said members having two ribs on its inner surface forming a guideway, means forming gripping jaws mounted to slide in said guideway, two levers mounted in said casing and provided with interengaging means, an expanding spring having its opposite ends seated against adjacent ends of the two levers, and the opposite ends of the levers having large flatheads thereon which engage the jaws to yieldingly resist separation of the same and to act as filler means to cause the jaws to maintain a proper vertical position.

2. In a pencil sharpener, a casing composed of two cooperating members, a plurality of jaw elements therein angular in shape to form a vertical part and a horizontal bearing part and a flared receiving part, said jaws being ada tedv to be moved in a guideway simultaneous y in opposite directions, levers mounted in said casing having interengaging arms so that movement of one will cause an equal and opposite movement of the other, a spring interposed between one pair of arms of the levers and the opposite arms having flattened heads thereon adapted to engage edgewise with the horizontal bearing portion and by side contact with a relatively large area of the vertical portion of the jaw elements.

3. A pencil holding device for a pencil sharpener com rising a casing, an opening therethrough, aw elements mounted in said casing and having portions extending through the opening and movable in opposite directions against spring tension, said jaw elements bein made angular shape to form with one part 0 each a receiving funnel and with the other part of each, slidlng elements, said sliding elements being mounted in a guideway and cooperating with levers so that both parts under the control of the levers will recede automatically an equal amount, when a pencil is inserted so as to maintain the center of the opening between the jaws always the same.

4. In a pencil holder, gripping jaws comprisin two cooperating angle members yieldingly eld together by a spring, one arm of the angle member forming a slide adapted to be held against binding upon movement by engagement'with large side bearing surfaces, the other arms cooperating to form a funnel receiving member for a pencil which is adapted, upon insertion of a pencil, to force the 'aws apart and protrusions on the angle memers which initially hold the jaws apart a predetermined amount.

5. In a pencil sharpener, cutting apparatus, means for holding a pencil comprising a casmg, pencil gripping jaws mounted thereed on said su in adapted to slide against'spring pressureand presenting outturned extensions with inclined faces, said inclined faces being adapted to engage the end of the pencil when the same is inserted and to cause the jaws to separate to receive same. v t

6. In a work holdin device, a support, a casing on said support, aws slidably mounted in said casing adapted to yield against spring pressure and having outturned extensions orming a funnel for receiving the work, said jaws being separated to permit the work to be inserted upon application of pressure on the work when same is placed so as to contact the inside faces of the receiving funnel.

7. In a pencil sharpener, a pencil holding means comprising a support, a casing mountrt, two ribs in said casing forming a gu1 eway, jaws mounted to slide in said guideway and adapted to be held normally closed, said jaws presenting a funnellike receiving extension with internal conical walls in order that the jaws may be caused to separate to ermit the insertion of a pencil when same 1s thrust into said-funnel-like receiving extension.

'8. In a device of the character described, pencil holding 'aws yieldingly mounted to recede from and approach each other, said jaws having comp ementary tapered openm' 's therein forming a pencil recelving unne cutting apparatus, pencil holding means comprising jaws on opposite sides of the axis of the cutting position of the pencil, said jaws being yieldingly mounted to simultaneously recede from and approach said axis, each of '9. In a device of the character described,

said jaws having a tapered recess forming a pencil receiving funnel.

Signed at Chicago, Illinois, this 17th day of August, 1926.

' CHARLES C. SPENGLER.

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