US1300760A - Sickle-grinder. - Google Patents

Description

J. C. NOEL. SICKLE GHIN'DEPI. APPLICATION FILED Aue.8. Isls.

1,300,760. Paiemed Apr.15,1919.

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/1 TTOH//EYS J. C. NOEL.

SICKLE GRINDER.

APPLlcAloN FILED Aue.s.191s.

Patented Apr. 15, 1919.

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JOHN G. NOEL, OF BELLEVUE, IDAHO.

sIcKLE-GRINDER.

To all whom t may concern l Be it known that I, JOHN C. NOEL, a citizen of the United States, and a resident of Bellevue, in the county of Blaine and State of Idaho, have invented certain new and useful Improvements in Sickle Grinders, of which the following is a specification. My invention is an improvement in sickle grinders, and has for its object to provide a device of the character specified, wherein a supporting frame is provided, having means for clamping the sickle, and wherein the grinding means is carried by a movable support mov-able toward and from the sickle manually, and normally spring pressed away from the sickle, the support having means for rotating the grinding means.

In'the drawings: Figure 1 is a front view of the improved grinder; Fig. 2 is side view; Fig. 3 is a partial top plan view showing the sickle and the grinding means; Fig 4 is a section on the line 4`4 of Fig. 1; and Fig. 5 is a detail section through the clamp.

In the resent embodiment of the invention a. su stantially A-shaped supporting frame 1 is provided for the sickle, and a seat 2 is arranged on one side of the frame, the said seat being supported by an arch bar 3 which is connected at one endrto a foot frame 4, and at the other end to a sectional bearing 5, which is secured on a tubular casing 6. This tubular casing is connected to a housing 7 at its lower end, andthe housing is connected to a transverse foot plate 8, the foot plate 8 and the foot plate 4 being adapted to rest upon the ground to support the grinder.

Braces Qare arranged between the bearing 5 and the foot plate 4 and other braces 10 are arranged between the foot plate and the housing 7. A shaft 11 is journaled transversely of the housing 7 and pedals 12 are connected with the ends of the shaft, which are extended beyond fthe fhousing. This shaft 11 has a gear connection with a vertical shaft arranged within the casing 6, and at its upper'end the shaft 6has a gear connection with a shaft 13 j ournaled transversely of theupper end of the tubular casing. This shaft 13 carries at one end a grinding wheel 14 and at the other end it carries a sprocket wheel 15, which is connected by an endless chain 16 with a sprocket wheel 17 on a shaft 18 journaled in a pair of supporting arms 19 which are Specification of Letters Patent.

Patented Apr. 15, 1919.

Application filed August 8, 1918. Serial No. 248,890.

mounted to swing on the shaft 13. This shaft 18 carries between the arms a grinding wheel 20 and the said wheel, as shown, is a double frustum of a cone, the two frustums being arranged with their large ends together and with their small ends outward. Thus the wheel is shaped to grind the inclined edges of the blades of the sickle 21.

The arms 19 are connected near the shaft 18 by a cross bar 22, and the grinding wheel 20 is secured to a sleeve or arbor 23 which is arranged between the arms and abuts at its ends the inner faces of the arms to properly space the grinding wheel, and the sleeve is keyed or otherwise secured to the shaft18.

The cross bar 22 has an opening intermediate its ends through which extends a rod 24, and the said rod passes at its lower end through an opening in the arch bar 3. Coil springs 25 and 26 encircle the rod above and below the cross bar. As shown more particularly in Fig. 4 the rod 24 has an annular shoulder 27 at its lower end, and the lower end of the spring 26 abuts this shoulder. The upper end of the spring 25 bears against the under face of a lever 28 which is pivoted at its forward end to a support29 extending upwardly from the tubular casing 6. This lever 28has an angular 'portion 30 at the wheel, and the angular portion has a grip, as shown in Fig. 1, for convenience in manipulating the lever. A nut 3l is threaded on to the rod above the lever 28, and it will be obvious that by pressing downward on the grip the spring 25 may be compressed. The sickle 21 is supported by a table 32 and the said table has extensions 33 at its ends which are supported at their outer ends by standards 34. `The Asickle is slidable on the extensions and the inner ends of the extensions are spaced apart, the table 32 being below the extensions and engaging .their under faces. Thus there is a clear space at the wheel 20, where the sickle is spaced above the table, and itis at thispoint that the wheel 20 engages the sickle.

Straps 35 are arranged at the inner ends of the extensions 33 at that face of the table toward the seat 2, and these straps support the rear end of the sickle blade, as shown in Fig. 4. The straps are spaced apart at their adjacent ends, however, as shown in Fig. 1, so that the wheel 2O has a clear space to engage the sickle blades throughout the extent of the cutting edge.` This table'32 is pivoted to the arms 36 of a substantially U-shaped member whose body 37 issecured'to the arch bar 3 before mentioned.

The table has depending angular pins 38 which engage openings in the upper ends of the arms, and the table is normallyheldin horizontal position by means of links 39. These links engage angular pins `40 atthe ends of the table, and at the forward edge thereof, the pins 38 being at the rear edge, and the linksdepend through bearing lugs 41 `on the arms 36 of the 'yoke or U-shaped member`36-37 An angle lever 42 is arranged in front `of the yoke Sti-37, the lever beingv pivotally supported 'by braces 43 4and 44, the former'brace beingy secured to the housing 7 while the latter is secured to the arms 364 ofthe yoke 36-37. The pivotal connection of the lever42 is atythe end of theishort arm andthe lever is rigid with the pivotal connection indicated at 45. Arms 46 extend forwardly from this pivotal connection, being rigiditherewith, and the said arms have openings through which the links 39-passiand the said links are secured to the The upper end of the lever 42 has a grip, and it will be obvious that by swinging the lever by means of the `grip the table 32 will be raised or lowered at its front edge. The sickle may be clamped during the grinding bymeans of the clamp shown more particularly' in Fig. 5. This clamp, as shown in Figs. l and 2, is arranged at one side of the grinding wheel 20 and engages the blades of the sickle, clamping the sickle on to the straps 35 and on to the extensions 33. The clamp consists ofa movable portion 47 which is slidably connected with a fixed portion 48 extending .forwardly from the under side of the` table' by meansof headed pins 49. e

Coil springs 50 encircle the pins between the portions 47 and 48 of the clamp and normally act to move the movable portion 47 upward. Av yoke 5l, consisting of a body and arms, incloses the portions 47-48 of the clamp, the bodyof the yoke being secured to the portion 48, with the arms extending upwardly on lopposite sidesfof the vportions 47-43 A .cam lever 52 is pivoted between the upper ends of the arms, and it will be obvious ythat when this cam lever is swung into the positionof Fig. 5 the sickle will be firmly clampedon to the straps 35 and the extensions 33.

In operation, the sickle to be ground is arranged onthe eXtensions'43 of the table 32 and the operator seats himself upon the seat 2, turning the grinding shaft 2O by means ofthe pedals 12. The'sickle is 'clamped with the space between ltwo blades in register withthe grinding wheel as shown in Fig. 3, and-vbyrfneans of the lever 52 the said sickle is clamped in this osition. Referring to Figs."4 and 5, it will l'e`n`ted thatH guides 53 are provided for limiting the movement of the sickle toward the operator. The operator now, by means of the grips on the levers 30-and 42 moves the sickle and the grinding wheel toward each other, nicely regulating the pressure, and at the same time grinding from the points of the blades toward the bases. It will be obvious that when the sickle is swung by means of the lever-42 to cause the points of the blades to move down# ward, the grinding wheel will move toward the bases of the blades, and the downward movement of the wheel will Aalso assistA in this relative'movement. rlhus by a gradual movement of the grips of the' levers 28 and ,42 toward the operator the entire cutting edge of the two adjacent blades will be ground.

Referring to Fig. lpofthe drawing, it will be noticed that clamps 55 are arranged lon the table 33 for engaging the" ends ofthe sickle blade to hold itin place. 'The sickle blade is movable through these clamps.

I claim:

1. A device ofthe character specified com- -prising a suitable `supporting frame, a driving shaftljournaled onuthe frame', pedal 'operated `mechanism for rotating saidT shaft, clamping means for holding the' sickle,a pair of arms journaled on thefdriving shaft, a grinder shaft fcarried `by the free ends of thearms, a driving connection between the said` shaftv and the driving shaft,A a grinding wheel on the said shaft, spring controlled means normally moving the free ends of the arms upward,v means for moving the said arms downward, and fmeans' for tilting the clamping means for the sickle. 'f

2. A device of the characterspeciied comprising` avsuitable Vsupporting frame, clamping mechanism on the .frame'for' holding a sickle, a swinging support for a grinding wheel movable toward and from the" sickle clamping means and normally `spring pressed away from the said clamping.means,and independent means" for moving the Ngrinding wheel toward and from 'the sickle' clamping means and for tilting* the sickle clamping means for the purpose specified.V

A device of the characterspecied comprising a supporting frame, clampingmeans' on the frame lfor holding the sickle, aswinging supportcarrying aA grinding wheel 'movi a'ble toward and fromthe' clampingmeans and normally spring pressed away Vfrorrrthe said clamping means, land *means'for'moving the sup-port toward and from the clamping Copies of this `patent may be obtained for ive cents each, by addressing the Commissioner of Patents, i l, 6. I V,

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