US1904075A

US1904075A - Scissors sharpener

Info

Publication number: US1904075A
Application number: US534375A
Authority: US
Inventors: Anton J Petrich
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-05-01
Filing date: 1931-05-01
Publication date: 1933-04-18
Anticipated expiration: 1950-04-18

Description

April 18, 1933.1 A. J. PETRICH 1,904,075

s cIssoRs SHARPENER Filed May 1, 1951 2 Sheets-Sheet 1 I Patented Apr. 18, 1933 UNITED STATES ANTON J". IPETRICI-I, OF -MILWAUKEE, WISCONSIN SCISSORS SHARPENER Application filed May 1,

This invention relates to sharpeners and more particularly to a device of this character by means of which the blades of a pair of scissors or shears may be sharpened.

One object of the invention is to provide a sharpener so constructed that it may be firmly secured upon a table or other support and the blades of a pair of scissors or shears easily and quickly sharpened.

Another object of the invention is to provide a sharpener having improved means for gripping a scissors blade to be sharpened and also improved means forsupport'ing a file or other suitable sharpener element in proper angular relation to the blade to be sharpened.

Another object of the invention is to permit the file to not only be held in proper angular relation to a blade during a sharpen ing operation, but also permit the file to be swung longitudinally ofthe blade and thereby moved along the blade while being reoiprocated" transversely thereof.

Another object of the invention is to so mount the blade holder and sharpener holder that one may be slid longitudinally of the other as a blade is sharpened, thereby permitting all portions of the blade to be sharpblade and eliminating danger of the blade not being'accurately replaced between gripping jaws.

Another object of the invention is to permit pressure to be applied to force the file downwardly into'good cutting engagement with a blade during a sharpening operation and at the same time cause'the file to be yieldably held against such movement.

The invention is illustrated in the accompanying drawings wherein: V

Figure 1 is a View in side elevation showing the improved scissors sharpener in use,

Figure 2 is a rear elevation of the improved sharpener,

Figure 3 is a fragmentary sectional view taken through the guide for a file along the line 33 of Figure 1,

Figure 4 is a side elevation of a modified 59 form of sharpening device, 7

Figure 5 1s a rear elevation of the sharpened without the necessity of releasing the 1931. Serial No. 534,375,

ening device shown in Figure 4: with the mounting for the file guide shown in section,

Figure 6 is a view in elevation of a modified form of file guide, and e t Figure 7 is aview taken at right angles to Figure 6.

The body portion 1 of the sharpening device is formed of strong metal and has its lower portion provided with a base 2 having arms or fingers 3 to rest upon'a tableorother support tand an arm 5 which extends beneath the table and carries a set screw 6'which when tightened engagesthe underface of the table and causes the sharpening device to be firmly held in place upon the table:

The upper portion of the body'is formed with a jaw 7 and a companion jaw 8 is pivoted to the body as shown at 9 and carries an adjusting screw'lO which engages through a threaded opening 11 formed in the stationaryjaw 7. Therefore the jaw 8 may be moved towards the jaw 7 and a blade 12 of a pair of scissorsor shears firmly gripped be tween the two jaws. It should be noted that the jaw 7 terminates slightly below the up per edge of the jaw 8 and has its upper face 13 beveled transversely as clearly shown in Figure 1, thereby permittingra scissors blade to be formed witha beveled edge face along its cutting edge during a sharpening opera'- tion. 7

An arm'l projects from the body 1 and to this arm is fastened a bar or track :15 which is secured by screws 15 and is substantially dovetailed in shape when viewed inan elevation as shown in. Figure 1 so that when a block 16 is set in place with the bar or track 15 engaged in an undercut groove'17 formed in the block, this block may be slid 'longi; tudinally upon the track and thereby be adjusted longitudinally of a blade gripped" between the j aws7 and 1 r In order to support and guide a fileor similar implement 18 there has been provided a mounting 19 consisting of

companion sections

20 and 21 which are held in engagement with each other by screws 22 and in this mounting is formed a slot 23 which extends diagonally as clearly shown in Figure 1 so that when the file 18 is passed through this'slot it will be disposed transversely of a scissors blade gripped between the jaws in such angular relation thereto that when the blade is sharpened by means of the file, a beveled face will be formed along the cutting edge of the blade. Bearing ears 24 extend downwardly from the section 20 of the mounting and between these ears is pivotally mounted an car 25 formed at the upper end of a stem 26 which is slidably received in an opening or socket 27 formed through the block 16. It will thus be seen that the mounting 19 may be tilted longitudinally of a blade as the file is reciprocated across the blade while sharpening the same. A pin 26 extending from the stem. and engaged in a slot 16 formed in the block 16 is provided to prevent the stem from turning in the socket 27.

There has also been provided a spring 28 which fits about the stem between the block 16 and the ears 24 and serves as a resilient cushion which normally supports the guide for the file in the position shown in Figure 1 but permits this guide to be forced downwardly by pressure applied to the file. When this-sharpening device is in use, it is secured upon a table or other support as shown in Figure 1 and a blade of a pair of shears set in place between the

jaws

7 and 8 and the screw 10 tightened until the blade is firmly gripped between the jaws. The cutting edge of the blade'projects slightly above the jaw 8 and its beveled edge face is disposed above the beveled face 13 of the jaw 7. The file is engaged through the slot 23 of the guide 19 and since theslot extends diagonally, the file will be retained in the proper angular relation to the blade. The file is gripped in the usual manner and reciprocated through the guide. Pressure exerted upon the file during a sharpening operation causes the spring 28 to be compressed and therefore a good cutting action may take place and the sclssors blade will be quickly sharpened.

In Figures 4 and 5 there has been shown a modified construction. In this embodie ment of the invention the jaw 29 instead of being formed solid with the body 30'is formed separate therefrom and at its lower end is provided with a depending foot 31 which is of a dovetailed construction when viewed in end elevation and is engaged in an undercut seat or groove 32 formed in a track bar 33 carried by the body 30. This track bar projects from opposite sides of the body as shown in Figure 5 and therefore thej aws may be slid longitudinally of this bar and a scissors blade gripped between the jaws shifted longitudinally during a sharpening operation. The jaw 33 which corresponds to the jaw-8 is pivoted to the jaw 29 as shown at 34 and is formed with an unthreaded opening 35 through which extends a stem 36 having one end portion threaded and engaged through a threaded opening 37 formed in the jaw 29. The handle 38 of this stem is pivoted to the outer end thereof and the end of the handle which is pivoted to the stem is enlarged to form a cam 39 which bears against the outer face of the jaw 33. By this arrangement the stem may be rotated to draw the jaw 33 towards the jaw 29 until a scissors blade is gripped between the two jaws and then the handle swung downwardly to force the jaw 33 towards the jaw 29 and cause the scissors blade to be more firmly gripped. This permits the jaw 33 to be easily and quickly moved into tight gripping engagement with a scissors blade and also permits a blade to be very easily and quickly released from between the jaws after being sharpened.

The blade guide 40 is cylindrical in shape and has its ends rotatably received in circular openings formed in the arms 41 ofa bearing bracket 42. The file receiving'opening or passage 43 extends diametrically through the block 40 and adjacent its ends the block is formed with circumferentially extending grooves 44 to receive the inner endsof screws 45 carried by the arms 41. The screws serve to retain the guide in place and when tightened serve to firmly secure the block and prevent it from turning. It will thus be seen that the block may be rotated to dispose the passage 43 in desired angular relation to a scissors blade to'be sharpened and the block prevented from turning out of the adjusted position by tightening the set screws. The stem 45 for the bearing bracket is pivoted thereto as shown at46 and this stem extends through a passage 47 formed in the head 48 of an arm 49 projecting inwardly from the base 30; Therefore the mounting for the file may be moved during a filing operation in order to prevent the file from binding. A spring 50 corresponding to the spring 28 is provided aboutthe stem between the bearing bracket and the upper end of the head 48.

In Figures 6 and 7 there has been shown a modified form of file mounting which can be used in place of that shown inJTigures l and 5. The stem '51 which corresponds to the stem 45, has its upper end pivotally connected with a bearing bracket 52 taking the place of bearing bracket 42 and this hearing bracket has its arms 53 formed at their upper ends with recesses 54 tofreceive stub shafts 55 projecting from opposite ends of a cylindrical block 56 corresponding to the block 40 and formed with a file receiving passage 57. Caps 58 are employed to retain the stub shafts in the recesses 54 and by tightening the screws 59 which retain the caps in place. pressure may be exerted upon the stub shafts to prevent the block from being turned. Therefore the passage 57 may be retained in desired angular relation to the blade of a pair of scissors gripped between jaws of the sharpening device. The slots orpassages 23, 43 and 57 are of slightly different shapes in cross section. This has been done in order to bring out the fact that files which are or different shapes in cross section may be employed and that the passages through which the files are to extend may be of any shape desired in cross section in order to conform to the cross sectional shape of a file to be used. It will also be understood that the sharpener engaged through the opening or passage of the guide may be a file having either coarse or fine teeth or may be a bar having smooth faces in case it is merely desired tosmooth the cutting edge of a scissors blade.

What is claimed is:

1. A shears sharpening device comprising a blade holder having a body adapted to be secured to a support, jaws carried by said body and one movable'towards and away from the other whereby ashears blade may be gripped between the jaws, means spaced transversely from one'jaw to slidably support a sharpener for reciprocating motion across a blade held between the jaws,

' the sharpener supporting element and jaws being movable one with relation to the other transversely of the support, the sharpener supporting element having a vertically disposed stem rotatably mounted whereby a sharpener carried thereby may be swung longitudinally of a blade gripped between the jaws, and a spring about the stem for yieldably resisting depression of the stem and said sharpener supporting element.

2. A shears sharpening device comprising a blade holder having a body adapted to be secured toa support, jaws carried by said body and one movable towards and away from the other whereby a shears blade may be gripped between the jaws, a socket carried by said body, the socket and jaws being movable one with relation to the other transversely of the support, a sharpener guide having a depending pivoted stem fitted in said socket to mount the guide in transverse spaced relation to one aw, and means interposed between the socket and sharpening guide to yieldably resist depression of the stem and sharpening guide.

3. A shears sharpening device comprising a blade holder having a body adapted to be secured to a support, jaws carried by said body and one movable towards and away from the other whereby a shears blade mav be gripped between the jaws, a socket carried by said body, and a sharpener guide having a depending pivoted stem fitted in said socket to mount the guide in transverse spaced relation to one jaw, the socket and jaws being movable one with relation to the other transversely of the support, and a spring about said stem to yieldably-resist depression of the stem and sharpener guide. 7

4. A shears sharpening device comprising a blade holder having a body adapted tobe secured to a support, jaws carried by said body and one movable towards and away from the other whereby a'shears blade may to releasably secure said guide in a set position with its passage in determined angular relation to a blade held between the jaws, and means interposed between the socket and sharpeningguide for yieldably resisting depression of said sharpening guide.

5. A shears sharpening device comprising a blade holder having a bodyadapted to be secured to a support, jaws carried by said body and one movable towards and away from the other whereby avshears blade may be gripped between the jaws, an arm project ing from said body, a socket carried by said arm and slidable longitudinally of a blade gripped between the jaws, a stem slidably mounted in said socket and projecting upwardly from the socket, a sharpener guide carried by said stem and projecting upwardly therefrom in transverse spaced relation to said jaws, and means to yieldably resist depression of the guide and stem.

6. A shears sharpening device comprising a blade holder including a support having coacting jaws adapted to clamp a blade, a rotatable sharpener guide, a yieldable support for the guide, and means for pivoting the guide to the support whereby it may be tilted laterally, the sharpener guide and jaws being movable one with relation to the other transversely of the support.

7. A shears sharpening device comprising a blade holder including a support having coacting jaws adapted to clamp a blade, a socket member spaced from said jaws, the

jaws and socket member being movable one V -be gripped between the jaws, a rotatable sharpener guide spaced transversely from one jaw, the sharpener guide and jaws being. movable one relative to the other transversely of the support, a yieldable support for the guide, and means for pivotingthe guide to the yieldable support whereby it may be tilted laterally.

9. A shears sharpening device comprising a blade holder having a body adapted to be 5 secured to a support, jaws carried by said body and one movable towards and away from the other whereby a shears blade may be gripped between the jaws, a rotatable sharpener guide spaced transversely from one jaw a yieldable support for the guide,

and means for pivoting the guide to the support whereby it may be tilted laterally, the jaws being slidable upon said body whereby a blade gripped between the jaws may be shifted longitudinally to adjusted position during a sharpening operation.

10. A shears sharpening device comprising a blade holder having coacting jaws adapted to support a blade, a bearing bracket spaced transversely from one jaw, a sharpener guide mounted for rotation in the bearing bracket, a yieldable support for the bracket, and means for pivoting the bracket to the support whereby said bracket may be tilted laterally with respect to the support.

In testimony whereof I affix my signature.

ANTON J. PETRIOH. [11. 8.]