US1175105A - Scythe-grinding attachment. - Google Patents

Description

1. S. WINCRANTZ.

SCYTHE GRINDING ATTACHMENT.

APPLICATION FILED NOV- 19, 1915.

- 1 1 75, 1 O5 Patented Mar. 14, 1916.

2 SHEETS-SHEET I.

THE COLUMBIA Puuyomupn c0., WASHINGTON, u. c.

I. s. WlNCRANTZ-. SCYTHE GRINDING ATTACHMENT.

APPLICATION FILED NOV-19. 1915.

2 SHEETSSHEET 2.

Patented Mar. 14, 1916.

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JOHN S. WINCRANTZ, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOB TO SAMUEL S. NEWMAN, OF PITTSBURGH, PENNSYLVANIA.

SCYTHE-GRINDING ATTACHMENT.

Application filed November 19, 1915.

To all whom it may concern:

Be it known that I, J OHN S. /VINonAN'rz, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Scythe- Grinding Attachments, of which the following is ,a specification.

The invention relates to scythe grinding attachments, and has for its primary objects, the provision of an attachment which can be used to grind a scythe upon the edge of the ordinary disk grinding wheel; and the provision of an attachment of cheap simple construction permitting of the grinding of the scythe edge along substantially its entire length. Certain embodiments of the invention are illustrated in the accompanying drawings, wherein-- Figure 1 is a side elevation of a grinding machine with the attachment applied thereto, the scythe blade being ground being indicated by the dot-and-dash lines; Fig. 2 is a front elevation of the apparatus with the scythe blade being ground in section; and Figs. 3' and 4 are front elevations showing modifications.

The attachment of Figs. 1 and 2 is shown as applied to the ordinary disk grinding wheel 1, operated from the handle 2, the driving gears being located in the casing 3. The casing is provided with the usual bracket socket 1 with the thumb screw 5 for securing the bracket in position. A bracket arm 6 has its horizontal arm fitting into the socket, while its upright arm carries the guide for the scythe blade. Mounted for sliding adjustment upon the upper end of the arm 6 is the angle arm 7, such arm being slotted as indicated at. 8 (Fig. 1) and being held adjustable by means of the thumb nut 9 so that the angle arm 7 can be adjusted to suit wheels of varying diameters, and to give the blade of the scythe the proper an le with respect to the grinding surface. Mounted upon the under side of the arm 7 is the member 10, such member carrying a bolt 11 fitting a slot in the arm 7 and carrying a thumb nut 12, so that the member 10 can be adjusted in and out depending upon the width of the scythe to be ground and upon the portion of the edge of Patented Mar. 14, 1916.

Serial No. 62,268.

the wheel with which it is desired that the edge of the scythe should engage.

The member 10 is provided with a depending L-shaped portion 13, having an upturned edge 14. This upturned edge 14 is adapted to engage the groove 15 at the outer edge of the scythe blade 16. The scythe blade is thus guided as against vertical movement and also as against lateral movement, and all that is required of the operator is to slide the scythe blade longitudinally back and forth upon its guide with the edge in contact with the surface of the grinding wheel.

The two adjustments made possible by the useof the thumb nuts 9 and 12 permit the device to be adjusted to suit all varying conditions which may arise and to position the blade at the proper angle with respect to the wheel. The bracket arm 6 has its upright portion preferably bent at an acute angle A with respect to the horizontal arm so as to bring the depending guide portion 13 above the axis of rotation 17 of the wheel (Fig. 1) so that substantially the entire length of the scythe blade can be applied to the grinding surface of the Wheel. This obviously would not be the case if the depending portion 13 were located to the right of the position shown in Fig; 1, as under these conditions the portion of the scythe iron which is bent at right angles to the blade and is driven into the handle would come in contact with the upright portion of the bracket arm 6 and prevent the blade from being moved far enough to the left to grind the rear portion of the scythe blade. It is, therefore, important that the guide member be located substantially over the center line of the wheel, and the bending of the bracket arm 6 at an acute angle provides a convenient means for securing this result. It is also a matter of great advantage to be able to grind the scythe blade upon the edge of an ordinary disk wheel instead of upon the specially constructed conical wheels which are suitable only for the one purpose, and I believe I am the first to devise an attachment whereby a scythe can be properly ground upon the ordinary disk wheel. Other advantages of the construction incident to its cheapness, simplicity and ease of the arm 19. This arm 19 carries a roller 21 having a flange 2-2 adapted to fit intothe groove at the edge of the scythe blade, such flange 22 performing the function of the upturned edge 14 of the construction of Fig. 2. In order to still further guide the blade the wheel 23 is provided, such wheel being mounted for rotation upon the depending arm 24. Such arm is screw-threaded and held in position on the angle arm 19 by means of the lock nuts 25. It will be seen that thisconstruction performs substantially the same function as-the guide of'Fig. 2, but is more expensive.

Fig. 1 illustrates still another modification adapted to be used with a conical grinding wheel 26. The attachment comprises a bracket 27 having an upturned end 28 carrying the flanged roller 29 adapted to engage the groove along the edge of the scythe blade; This form of attachment is illustrated in my Patent No. 1,113,394: of October 13, 1914, and the bar 29 serves as a support for another attachment not shown, and forming no part of the present invention, and in addition serves to steady the blade of the scythe as it moves back and forth. Various other modifications of the invention are possible, but the foregoing serves to illustrate the broad principle involved in the use of a guide for the grooved edge of ascythe blade provided with upwardly prd jecting means for engaging the groove in the blade and preventing lateral movement as the blade is reciprocated.

What I claim is:

1. The combination with a grinding wheel, of a bracketand guide means carried thereby including an upwardly projecting means adapted to engage the groove on the s de of a scythe blade remote from the cutting edge.

2. The combination with a disk grinding wheel, of a bracket and a guide means lying to one side of the face of the wheel, and comprising upwardly projecting means adapted to engage the groove extending along the edge of a scythe blade.

3. The combination with a disk grinding wheel, of a bracket and a guide means lying to one sde of the face of the wheel, and comprising upwardly projecting means adapted to engage the groove extending wheel.

along the edge of a scythe blade, thesaid guide means being adjustable transversely wheel, and comprising upwardly projecting means adapted to engage the groove extending along the edge of a scythe blade.

6. The combination witha disk grinding wheel, of a bracket and a guide means lying to oneside of the face of the Wheel in substantially vertical alinement with the axis of rotation of the wheel, and comprising upwardly projecting means adapted to en gage the groove extending along the edge of a scythe blade. 7 I I 7 7. The combination with a: disklgrinding wheel, of a bracket extending transversely of the edge of the wheel, and having a depending L portion with an upturned" edge lying opposite the side of the wheel and adapted to engage the groove in the' edge of a scythe blade. 7

8. The combination with a disk grinding wheel, of a bracket extending transversely of the edge ofthe'wheel, and'having a depending L portion with an upturned edge lying opposite the side of the wheel and.

adapted to engage the groove in the edge of a scytheblade, the said L portion being adjustable toward and from the side of the wheel.

7 9. The combination with a disk grinding wheel, of a bracket extendingtransversely of the edge of the-wheel, and having a depending L portion with an upturned edge.

lying opposite the side of the wheel and adapted to engage the groove in the edge of a scythe blade, the said L portion being ad justable toward and from the axis of the 10. The combination with a disk grinding wheel, of a bracket extending transversely of the edge of the wheelin substantially the same vertical plane as the axis of rotation of the wheel, and having a depending L por tion w th an upturned edge lying opposite the side of the wheel and adapted to engage the groove in the edge of a scythe blade.

JOHN s. WINCRA-NTZ. 1

Copies of this patent may be obtained for five cents each. by addressing the Commissioner of Patents,

Washington, D. G. i

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