Патент USA US2131626код для вставки
SePt- 27» 1938? . R. |_. KEITH , ' 2,131,626 SHARPENING JIG Filed Aug. 6, 1937 6 7 2 Sheets-Sheet l. Inventor ' A iiorney?s Sept. 27, 1938. SHARPENING R |_,‘ KEITH JIG Filed Aug. 6, 1957 ' ' I 2 Sheets-Sheet 2 Inventor 7% Patented Sept. 27, 1938 . 2,131,626 UNITED ‘STATES, PATENT OFFICE! ' 2,131,626 ‘ SHARII’ENINGY JIG , Raymond L. _Keith, De Land, Fla. Application August 6, 1937, Serial No.;‘15'7,794 ‘ '2, Claims. (01. 51—158) This invention is a sharpening jig and has as wing nut equipped bolts 2| rising from the plate It) and accommodated in arcuate slots 22 pro its object the provision of a device of this char vided in plate 20 adjacent to relatively opposite acter particularly designed for sharpening chis els, bits, and the blades of planes and analogous ends of the plate as shown in Figure 3. Plate 20 is disposed over an opening 23 pro ,6, tools; and the invention together with its objects and advantages will be best understood from the vided in the plate I0, and is itself equipped'with following description taken in connection with a rectangular opening 24 that accommodatesthe blade 25 to be sharpened. the accompanying drawings wherein, Adjacent one end of the opening 24 plate 20 Figure 1 is a side elevational View of the jig, has struck-up therefrom a web 26 through which 10.. 10 Figure 2 is a top plan of the base of the jig, is threaded a clamping bolt 21 provided with a Figure 3 is a top plan view of the plate assem clamping head 28. bly forming part of the jig, * At opposite sides of the opening,“ there are Figure 4 is a perspective view of a blade sup porting member, .15. _ Figure 5 is a perspective view of the upper end of a supporting post. Referring to the drawings more in detail it will be seen that in the preferred embodiment thereof, the sharpening jig comprises a base plate 20 5 provided in the top face thereof and adjacent provided integral depending ?anges 29 between the lower corners of which is pivoted as at 30 a blade supporting plate or member 3|. Plate 3| has hinged to the underside thereof as at 32, a slotted supporting brace 33 that is adapted to rest on the plate 20 and accommo dates in the slot thereof a wing nut equipped 20 opposite longitudinal edges thereof with longi tudinally spaced, continuous grooves 6, '|, elon gated longitudinally of the base plate. bolt 34 rising from the plate 20. Obviously through the medium of the brace 33 and wing Between one pair of grooves, as for example the grooves 6, plate 5 accommodates thereon an oil stone 8 or other suitable abrasive element; plate 5 having struck-up therefrom suitably posi 3| may be held in the desired angle of inclina tion with the blade 25 to be sharpened clamped 25 between the plate 3| and the head 28 of adjusting screw 21, as will be clear from a study of Fig tioned retaining clips or ears 9 to engage at oppo ure .1. site sides and the respective opposite end edges 30 of the abrasive element 8. A relatively shorter rectangular plate I0 is sup ported at one end thereof through the medium of legs or standards I I and at the relatively oppo site end thereof through the medium of legs or 35 standards |2. The legs or standards I l are provided in their lower ends with sockets to accommodate balls or other suitable anti-friction elements l3 that ride in the grooves 6. At their upper ends the 40 legs or standards II have reduced extensions l4 that extend through openings provided in the corner portions of the plate It! and are provided with collars |5 that are retained on the exten sions |4 against rotative movement, but in a 45 manner to permit longitudinal or vertical move ment of the collars on the ends l4 through the medium of pins |6 that are accommodated in slots |'| provided in the ends M of the legs or standards ||. Springs l8 are disposed about the reduced ends 50 M of the legs or standards I | and are interposed between the plate In and shoulders l9, Resting ?atly on the plate I0 is a smaller plate 20 that is secured at the desired angular adjust 55 ment on the plate l0 through the medium of nut equipped bolt 34 the blade supporting plate It will thus be seen that with this device the blade 25 is held at the desired angle of inclina 30 tion with the edge thereof to be sharpened engag ing the top surface of the abrasive block 8. With the blade thus supported in engagement with abrasive block 8 the carriage 35 consisting of the aforementioned plate l0, plate 20 and as 35 sociated parts, legs II, and the legs |2, which lat ter at their upper ends are riveted to one end of the plate ID at the corners thereof, and at their lower ends are provided with sockets accommo dating balls or anti-friction elements 36 working in the grooves ‘I, said carriage 35 may be caused to travel back and forth and laterally from one side to the other as controlled by the cooperating grooves Band balls l3, and cooperating grooves ‘| and balls 36 so that the edge of the blade 25 45 is moved in corresponding direction over the sur face of the block 8 to effect a sharpening of the , blade edge in a positive, quick and e?icient man ner. Obviously by adjusting the plate 20 to the desired angle relative to the plate I0 the edge of 50 the blade to be sharpened may be held in the de sired oblique angle to the length of the abrasive stone 8 as may be required for a more effective sharpening of the blade edge. Also springs |8 provide a yielding support for 55 2,131,o2e one end of the plate l0 and associated parts whereby pressure of the hand on the plate l0 may be utilized for controlling the amount of pressure with which the edge of the blade 25, being sharp ened, will be brought into and maintained in con tact with the surface of the abrasive element 8. It is thought that a clear understanding of the construction, utility and advantages of an inven tion of this character will be had without a more 10 detailed description, _ , Having thus described the invention, what is claimed as new is: 1. A blade sharpening jig comprising a base " ing member and said clamping screw cooperating to .clamp a blade to be sharpened therebetween. 2. A blade sharpening jig comprising a base plate provided in the top surface thereof with pairs of opposed, endless elongated grooves, means on said base plate for engaging and securing an abrasive block in position on the base plate, a carriage including a plate, supporting legs for the plate, and anti-friction means on the lower ends of the supporting. legs engaging in said 10 grooves for controlling the direction of movement of said carriage relative to said plate and the abrasive element thereon, and a blade holding plate provided in the top surface thereof “with, and clamping device mounted on the plate of said 15 pairs of opposed, endless elongated grooves, means ‘carriage, said blade holding and clamping device 15 on said base plate for engaging and securing an including an apertured plate mounted on the car riage plate ‘and provided at one end of said aper abrasive block in position on the base plate, a car riage including a plate, suppdrting legs for the" ‘ ture with aniupwardly directed ?ange, a clamp plate, and anti-friction means on the lower ends. 20 of the supporting legs engaging in said‘grooves for controlling the direction of movement of said carriage relative to said plate and the abrasive element thereon, and a blade holding and clamp ing device mounted on the plate of said carriage, said blade holding‘and clamping device including an apertured plate mounted on the carriage plate and provided at one end of said aperture with an upwardly directed ?ange, a‘ clamping screw threaded through an opening in said ?ange, said 30 apertured plate also having ?anges depending therefrom at opposite sides of- the aperture, a blade supporting member pivoted at one end be tween said ?anges, interengaging means on said apertured plate and said blade supporting mem 35 berrfor securing the latter at the desired posi tion of angular adjustment, said blade support ing screw threaded through an opening in said ?ange, said apertured plate also having ?anges 20 dependingtherefrom at opposite sides of the aper ture; a blade supporting member pivoted at one end between said ?anges, interengaging means on said, apertured plate and said blade supporting member for securing the latter at the desired posi tion of angular adjustment, said blade support ing member and said clamping screw cooperating to clamp a blade to be sharpened therebetween, 25 and" means resiliently connecting said carriage plate- at one, end thereof to its supporting legs 30 whereby pressure of the blade to be sharpened against the abrasive element may be regulated at the will of the operator, and means for securing said apertured plate on the carriage plate for angular adjustment relative to the carriage plate. a 5 RAYMOND L. KEITH.