US1946625A

US1946625A - Shears sharpener

Info

Publication number: US1946625A
Application number: US426151A
Authority: US
Inventors: Charles C Isaacs
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-02-05
Filing date: 1930-02-05
Publication date: 1934-02-13
Anticipated expiration: 1951-02-13

Description

Feb. 13, 1934.

c. c. ISAACS 1,946,625

SHEARS SHARPENER Filed Feb, 5, 1950 ZSheets-Sheet 1 n/g MW Feb. 13, 1934. c. c. ISAACS SHEARS SHARPENER Filed Feb. 5, 1930 2 Sheets-Sheet 2 w M 4 4 m V 5 W C. C. jgaazca.

Patented Feb. 13, 1934 UNITED STATES PATENT QFFICE 6 Claims.

This invention relates to sharpening devices and more particularly to a device whereby the blades of a pair of shears may be sharpened. When sharpening a pair of shears, a beveled edge is formed along the cutting edge of each blade and these edges should be ground at the same angle and preferably the angle at which they were originally ground.

It is, therefore, one object of the invention to provide a sharpener for a pair of shears of such construction that a blade of a pair of shears may be firmly secured in a clamp and a supportcarrying the clamp retained in such an adjusted position that an abrading stone may be moved across the beveled edge of the blade and the original angle of the edge maintained when sharpening the shears.

Another object of the invention is to so mount the clamp-carrying arm and a brace for the same that after the support for the clamp has been adjusted it may be retainedin the set position and thereby not only allow a blade to have a beveled edge formed at the desired angle but cause the second blade of the shears to be similarly ground when the first blade has been sharpened and released from the clamp and the second blade engaged in the clamp.

Another object of the invention is to provide the sharpener with improved means for mounting an abrading stone and not only allow the stone to be moved transversely of the blade but also longitudinally thereof and further permit the stone to be moved in a circular path as it is shifted transversely and longitudinally of the blade.

Another object of the invention is to provide a scissors sharpener which is simple in construction and very easy to operate.

The invention is illustrated in the accompanying drawings, wherein Figure 1 is a view showing the improved shear sharpener in side elevation,

Fig. 2 is a longitudinal sectional view taken on the line 2--2 of Fig. 1,

Fig. 3 is a transverse sectional view taken on the line 33 of Fig. 1,

Fig. 4 is an enlarged fragmentary sectional view taken on the line 4--4 of Fig. 1, and

Fig. 5 is a fragmentary sectional view taken on the line 5-5 of Fig. 1.

The base 1 of the improved shears sharpener consists of an elongated strip of metal, one end portion of which is bent upwardly to form a standard 2 and the other end portion being bent upwardly to form a standard 3. The upper end por- 55 tion of the standard 3 is bent outwardly to form a horizontally disposed arm 4 through which an opening 5 is formed and the upper end of the standard 2 is cut to provide tongues which are rolled to form hinge sleeves 6 spaced from each other transversely of the standard. A tongue 7 is go cut from the strip 1 and bent upwardly to form a bearing spaced from the standard 3 longitudinally of the base and this hearing rotatably receives one end of a threaded shaft 8. The other end portion of the shaft is rotatably received in an opening formed through the standard 3 and terminates at its outer end in a head 9 by means of which the shaft may be rotated. A nut or equivalent element 10 is threaded upon the shaft to engage the inner surface of the standard and prevent 1 the shaft from moving longitudinally of the base. Therefore, the inner end of the shaft will be retained in engagement with the ear or bearing 7. Upon the shaft 8 is mounted a block 11 having a threaded bore through which passes the shaft, and from an inspection of Figure 5 it will be seen that the lower end portion 12 of this block is re duced in width and engaged between guide flanges or strips 13 formed by cutting elongated tongues from the strip 1 and bending the same upwardly. 39 Therefore, the block or mounting 11 will be prevented from turning about the shaft 8 and when the shaft is rotated'this block will be shifted longitudinally of the base. Between the opening14 formed by the tongue 7 and the standard 2, the 35 strip from which the base is formed is crimped, as. shown in Figure 3, thereby forming a rib 15 which projects upwardly and serves to reinforce the base.

In order to support a pair of shears, there is employed a clamp 16 having spaced jaws 17 through the outer one of which is formed a threaded opening to receive a set screw 18. The inner faces of these jaws extend diagonally, as shown in Figure 1, and, therefore, when a blade of the shears 19 is disposed between the jaws and the set screw tightened, the blade will be firmly gripped and retained in place, as shown in Figures 1 and 3. The lower portion of the clamp is reduced to form a neck 20 and this neck which is circular in cross section fits into a socket 21 where -10) it is held in place by a set screw 22. Since the neck of the clamp is circular, it may be turned in the socket and insure proper positioning of the shear blade. The socket 21 is firmly fixed upon the upper end of an arm 23 and this arm consists of a strip of metal having its lower end portion cut to form a tongue which tongue is rolled to form a sleeve 24 disposed between the hinge sleeves 6 of the standard 2. A pin 25 is passed through the

sleeves

6 and 24 and, therefore, the 11 arm 23 will be pivotally connected with the standard 2 for swinging movement longitudinally of the base. By this arrangement the arm may be disposed vertically or at an incline. The lower portion of the socket 21 projects inwardly and is formed with bearings 26 through which extends a pin 27 to engage through an eye 28 formed at the inner end of a bracing rod 29. This rod eX- tends longitudinally above the base and at its other end is formed with an eye 30 which fits between bearing ears 31 projecting upwardly from the block 11 and is engaged about a pin 32 carried by the ears 31. The rod 29 is formed of stiff metal, such as thick wire, and it will be readily understood that when the shaft 8 is rotated to move the block 11 longitudinally thereof the rod will cause the arm 23 and socket 21 to be moved towards or away from a vertical position and retain the same in a set position when rotation of the shaft ceases.

Upon the arm 4 of the standard 3 is disposed a bearing bracket 33 having upstanding ears or arms 34 and from this bracket extends a depending neck 35 rotatably received in the opening 5 of the arm and having its lower end formed with a head 36 to retain the stem in the opening. Therefore, the stem constitutes a pivot to rotatably connect the bearing bracket with the arm. The bearing bracket is formed of resilient metal and its arms 34 have portions struck inwardly, as shown at 37, to form lugs or trunnions which engage in recesses 38 formed in opposite sides of a sleeve 39; Therefore, the sleeve will be pivotally mounted for tilting movement in a vertical direction. This sleeve slidably receives 'a rod 40, the forward end of which is engaged in a socket formed in the shank 41 of a holder 42, and in order to securely but releasably retain the rod in the socket, there has been provided a set screw 43. The holder 42 is formed from a strip of metal having its end portions bent to form jaws 44 adapted to engage about correspondingly shaped ends of an abrading stone 45. Since the ends of the stone and the jaws are formed to mate, as clearly shown in Figure 1, the stone may be slid transversely into and out of engagement with the holder but it will be firmly gripped by the jaws and prevented from dropping out of the holder.

When this shears sharpener is in use, a blade of a pair of shears is disposed between the jaws of the clamp 16 and the set screw 18 tightened. The abrading stone rests upon the shears blade and the shaft 8 is rotated to move the block 11 longitudinally of the base and tilt the arm 23 and socket 21 together with the clamp carried by the socket until the abrading stone rests flatly against the beveled edge of the shears blade. This insures proper angular disposition of the shears blade and it is then merely necessary to grasp the stone and its holder and move the stone transversely back and forth across the blade and longitudinally thereof either by a straight reciprocating motion or by a circular motion until the blade is sharpened. The set screw 18 'is then loosened so that the sharpened blade may be withdrawn and the other blade of the shears set in place. Since the sharpener has already been adjusted when the first blade is set in place, it is then merely necessary to impart movement to the stone and the second blade will have its beveled edge ground at the same angle as the beveled edge of the first blade. If it is desired to change the angle of the beveled edges of the shears blades when sharpening, the

proper adjustment may be made or if the device is used for initially sharpening the shears, the block 11 may be adjusted to set the device and dispose the shears blade in the proper angular position.

Having thus described the invention, I claim:

1. A sharpener for shears comprising shearsholding means pivotally mounted, a bracing rod pivoted to the shears holder, a mounting pivoted to said rod and formed with a threaded bore, a threaded shaft rotatably mounted and engaged through the bore of the mounting to move the mounting longitudinally of the shaft when the shaft is rotated and angularly adjust the shears holder, means to prevent said mounting from turning with said shaft when the shaft is rotated, an abrading element, and means to mount the abrading element for movement across a blade of a pair of shears held by said holding means in contact with the blade.

2. A shears sharpener comprising 'a base,

standards extending upwardly from said base in spaced relation to each other longitudinally thereof, an arm pivoted to one standard, shearsholding means carried by said arm, a tongue extending from said base between said arms, a threaded shaft extending longitudinally of the base between said standards with its inner end rotatably received in an opening formed in said tongue and its outer end portion engaged through the opening formed in the second standard and provided with a turning head, a nut carried by said shaft and engaging the inner face of the last-mentioned standard to prevent longitudinal movement of the shaft, a mounting having threaded engagement with said shaft and moved longitudinally thereof when the shaft is rotated, the mounting being held against rotary movement with the shaft to insure longitudinal movement of the mounting, a bracing rod connecting the arm and mounting to angularly adjust the arm when the shaft is rotated and retain the arm and shears-holding means in a set position, a universal bearing carried by the secondmentioned standard, and a carrier for an abrading element slidably engaged with said bearing and pivotally mounted thereby for movement across and longitudinally of a blade of a pair of shears held by the shears-holding means. 3. A shears sharpener comprising a base, standards extending upwardly from said base in spaced relation to each other longitudinally thereof, an arm pivoted to one standard and having a socket at its upper end, a clamp engaged in said socket and adapted to hold a pair of shears with a blade thereof extending transversely of the base, a threaded shaft rotatably mounted over said base and extending longi tudinally thereof, a mounting in threaded engagement with said shaft and moved longitudinally thereof when the shaft is rotated, a portion of said mounting having engagement with said base to prevent rotation of the mounting with the shaft when the shaft is rotated, a bracing rod extending between said socket and mounting and having its ends pivoted to the same, a universal bearing carried by the other standard, and a carrier for an abrading element slidably engaged with said bearing and pivotally mounted thereby for movement across a blade of a pair of shears held by the shears-holding means.

4. A shears sharpener comprising a base, standards extending upwardly from said base in spaced relation to each other longitudinally thereof, an arm pivoted to one standard and having a socket at its upper end, a clamp engaged in said socket and adapted to hold a pair of shears with a blade thereof extending transversely of the base, a threaded shaft rotatably mounted over said base and extending longitudinally thereof, a mounting in threaded engagement with said shaft and moved longitudinally thereof when the shaft is rotated, a track being formed longitudinally of the base beneath said shaft and the mounting having its lower portion engaged with the track to prevent rotation of the motmting with the shaft when the shaft is rotated and insure longitudinal movement of the mounting, a bracing rod having its ends pivoted to the mounting and socket, a universal bearing carried by the other standard, and a carrier for an abrading element slidably engaged with said bearing and pivotally mounted thereby for movement across a blade of a pair of shears held by the shears-holding means.

5. A shears sharpener comprising a base, standards extending upwardly from said base in spaced relation to each other longitudinally thereof, an arm pivoted toone standard and having a socket at its upper end, a clamp engaged in said socket and adapted to hold a pair of shears with a blade thereof extending transversely of the base, a threaded shaft rotatably mounted over said base and extending longitudinally thereof, a mounting in threaded engagement with said shaft and moved longitudinally thereof when the shaft is rotated, a track being formed longitudinally of the base beneath said shaft and the mounting having its lower portion engaged with the track to prevent rotation of the mounting with the shaft when the shaft is rotated and insure longitudinal movement of the mounting, a bracing rod having its ends pivoted to the mounting and socket, a bearing bracket rotatably connected with the upper end of the other standard and having arms extending upwardly, a sleeve disposed between the arms of said bearing and pivoted thereto, an abrading element, and a holder for said abrading element having a stem slidably engaged through said sleeve and pivotally mounted for universal movement by the sleeve and bearing whereby the abrading element may be disposed against a blade of a pair of shears and moved across and longitudinally of the blade.

6. A shears sharpener comprising a base, standards extending upwardly from said base in spaced relation to each other longitudinally thereof, an arm pivoted to one standard for tilting movement longitudinally of the base and having a socket at its upper end, a clamp engaged in said socket and adapted to hold a pair of shears with a blade thereof extending transversely of the base, means for adjusting the angular position of said arm and retaining the arm in a set position, a bearing bracket rotatably connected with the upper end of the other standard and having arms extending upwardly, a sleeve disposed between the arms of said bearing and pivoted thereto, an abrading element, and a holder for said abrading element having a stem slidably engaged through said sleeve and pivotally mounted for universal movement by the sleeve and bearing whereby the abrading element may be disposed against a blade of a pair of shears and moved across and longitudinally of the blade.

CHARLES C. ISAACS. [L.S.]