US65193A - Improvement in machines foe slotting harvester guard-fingers - Google Patents

Description

nitrh tstts stznt frl IMPROVEMENT IN MAGHINESJFOR SLOT'IING HARVESTER GUARD-FINGERS.

tlge dgatle referat tu in time cttrrs atsnt mit mating artt ti tigt 5min.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, JEROME .FAssLulu of Springeld, in the' county of Clark, and State of Ohio, have invented a new and useful Improvement in Machines for Slotting I'Iarvcsters Guard-Fingers.; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, in whieh- Figure 1 is a top plan of my machine.

Figure 2 is a front elevation.

ligure 3 is an end sectional elevation on line :c a; of-fig. 2.

Figure 4 shows, in side view, thc guard-finger before and after slotting.

Figure 5 represents upper and lower bridge-frames to connect the guiderods at top and bottom, if desirable.

That others may understand the construction and operation of my invention, I will particularly describe it.

The principal frame consists of a table, A, supported upon legs B B. This table and its legs are made of cast iron, as that material affords the required conditions of strength, ready manipulation, compactness, and capacity for ornamentation. The legs at each end of the table are united near' the bottom by the braces C C, upon "which are mounted the boxes D D, for the journals of the main crank-shaft E, upon the projected ends of which are the fast-and-loose pulleys F and G, upon which runs the driving-belt. The guide-rods H H are two cylindrical pillars, upon which the saw-frame is mounted. About at the centre of length there is an enlargement with a projecting flange or collar, I, at one end ot' the same, and a screwthread for the nut J at the other. Theobject of this enlargement is to enable me to form a screwthread for the nut J, the orifice through which must be large enough to permit the shaft of the guide-rod H to pass freely. Holes of proper size to admit the enlarged portion of theuguide-rod are made through the table A, so that the collar I will rest on the upper side of the table, and the nut J will screw up hard against the lower side of the same, and the rod will thereby be` securely and rigidly secured tov the table. The guide-rods are then perpendicular to the surface of the table, and parallel with each other. The heads K of the saw-frame or gate are provided-near their ends with holes, through which these guide-rods H pass snugly, and the heads move up and down thereon freely. The saw-gate or frame is completed, and the heads K secured together, and at the same time retained at the proper distance apart by the rods L L, which are provided with shoulders, and screw-nuts at the ends. The attachment of the guide-rods at their centres requires the presence of the collars I I, and the portions of the saw-frames which connect the heads must be placed far enough inward to clearthc said colla-rs as the gate moves up and down. The rods L L are therefore placed at a distance from the ends of the heads K, through which the guide-rods pass; and in this particular the construction of the saw-frame and its guides is novel, so far as Iam aware. Through the heads K K I place one or more straining-heads M M, with screw-nuts NIN, which secure the heads M in place, and also serve to strain the saws, as may be required. A description of one of these heads will apply to all. From the front and end is made a rectangular recess, into which the end of the saw projects; 'this recess is considerably wider than the thickness of the saw, so that the latter maybe adjusted to one side or the other, and this is accomplished by the set-screws O O, which are tapped through the sides of the head. The pin P retains the saw within the head, and this pin is inserted through a, horizontal slot through the head, und through a hole in the end of the saw. rlhe slot permits the end of the saw to he adjusted forward or backward, aud'i's retained in the desired position by a setfscrew, Q, (figs. 1 and 3,) inserted through the back of the head M.v When the saws It are thus placed in the straining-heads, they may be adjusted with the utmost ease and accuracy 'in any direction so that they will run with perfect truth, and without any possibility of a loss of adjustment. The pitman R transmits motion from the crank-shaft E .to the saw-frame K. Upon the upper surface of the table A, and extending from front to rear, midway between the guide-rods H H, is the carriageway S, which is constructed in the -usual manner, with parallel and overhanging edges, which are embraced by the corresponding edges of the carriage T, which moves back and forth on said way The carriage T is mowed by a feeding-screw, having at its outer end the ratchetcd handnvhecl U, which may be moved forward by an automatic mechanism and backward by hand.

The automatic feed-motion is constructed and arranged as follows: To the lower side of the table A,.and near one end, is mounted in suitable bearings a short shaft, V, provided at one end with the loose pawl W, and at the other with a crank-bar, Y, which projects at right angles to the shaft for a' short distance, and then at right angles again, or parallel with the axis of the' shaft V, until it projects over the lower head K. At each upward stroke of the saw-frame, the lower head K lifts the bar W a short distance, and this, through the shaft V, lifts the pawl W, and causes the wheel U to rotate a greater or less distance, according to the proportionate distances of the various parts from their centres of motion. That the distance which the rising of the crankbar Y will raise the pawl W and rotate the wheel Il may be changed, the pawl W is hung upon a short slotted arm, a, along which it may be shifted nearer to or farther from the axis of the shaft V. It is desirable that an automatic stop should be provided whenever an automatic feed lis employed. In this case I have adopted the following-described device: Beneath the table, and near the rear edge of same, is hung, in suitable bearings, the lever b. The inner end of this lever extends beneath the end of the crank-bar Y, so that when the outer endof biisdepressed, the crank-bar will be raised up so high that the head K will not reach it when it rises up. A spring, c, thus depresses the outer end o f the lever b, when not restrained, andprevents the operation of the automatic feed. The latch d, which is pivoted to the outer end of the lever b, serves to restrain the spring c, by hooking the free end of the ltitchd over a ledge formed for that purpose on the rear edge of the table A, as clearly shown in figs. 1 and 3. Ascrew-pin, e, set in the rear end of the carriage T, dis'engages the latch d, when the said carriage has been moved a certain distance, and thus permitting the` spring c to act, the automatic feed is stopped. The pin e may be lengthened or shortened at pleasure, so as to stop the feed sooner or later, as desired.

Upon theupper'surface of the carriage I are the'holding-blocksfg. The blockf consists of an angle-bar, having a tapered hole through its upright portion for the reception of the point of the tooth or guard-finger h. The horizontal portion or base is slotted in the direction of its length, so that it may be movedl forward or back without altering the position of the binding-screw c', which secures it in place. The block g holds the rear portion of the guard-finger during theioperation of slotting. f Across the rear portion of the. carriage T is made a channel, at right angles to its line of movement. `This channel forms-a guide for the block g, when being adjusted, said block fitting partially within this channel se as to be confined by its sides. The block g consists of a bed-plate with two flanges .at one end, which projects upward, and one of which forms the face, against which the guard-finger h is clamped by a screw, k, which passes 4through the other for that purpose. The block o is securely held in the desiredposition by a binding-screw, m, which passes upward 4through the carriage T, and through a transverse slot in the block into a binding-nut on the top, and a lateral adjustment is secured by the screw n, which is inserted through a toe turned downward from the outer end of the bed-plate of the holdingblock g, so as to bear against the edge of carriage T.

By these linstrumentalities I am enabled to adjust, with the utmost certainty and exaetness, the guardinger to be submitted to the action of the saw for the purpose of forming the slot through which the harvestercutters are to be reciprocated, and by increasing the Vnumber of saws in my saw-gate, and correspondingly increasing the number of the holding-blocks on my carriage, I am enabled to operate upon any desirable nurnber of fingers at-the same time, though in practice I have found that two saws and holders to each machine is an advantageous number. I l

It` may sometimes be found desirable to inc ease the stiffness of the guide-rods H, and I provide for that purpose bridge-frames, as represented in iig. 5, r being the upper frame, and t the lower one, with an opening for the pitman through its centre. These frames are fitted tothe upper and lower' ends of guide-rods H H, and

are secured there by screw-bolts, though their use is considered as seldom, if ever, necessary.

The point of thefclamping-screw 7c is`providcd withwhat is known as a hollow orfemale centre, so that, instead of making a conical indentation where it presses againstthe guard-finger, a slight ring only is indented, and the further advantage is also gained, that the centre is less liable to slip to one side as thc screw is forced up than would be the case if a point only should be used.

When'the guard-finger is to be placed in the machine to be slotted, the surface, u, of the heel, which has been rendered true in the milling or planing machine, is placed against the face of the flange g, fig. 1, and the screw k forced against it. The `'ringer is then in the proper position to be slotted; the point-holder f is then brought to the point of the finger, so that the end thereof is inserted through the hole provided for it, and the nut on thc screw t' is tightened so as to retain the finger in position. In practice it is only necessary to loosen l the nut on the boltz' when the new finger is to be inserted, as a very little change of position is all that is required ir any case.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is- Securing the guide-rods, constructed as described, to the table A, substantially in the manner shown and set forth. l

The rods L L, to connect the heads K K of the saw-frame, iii-connection with the independent guide-rods I H H, in 'the manner shown and for the purpose set forth.

The'straining-head M constructed as described, with the set-screws O O- Q and the pin P, passing through a horizontal slot, for the purpose set forth. l

The holding-block g, constructed as described, to hold the guard-finger 71. while being slotted, as set forth.

In combination with the holding-block g, the point-holder f, all constructed as andfor the purpose set forth.

The carriage I and holding-bloeksj` and g, combined and arranged as set forth.

The combination of the carriage T, holding-blocks g and f, and the saw-frame K L, when the carriage and holding-blocks are located and arranged between the parts of the saw-frame, as set forth.

The arrangement of the shaft V, pawl W, and crank-bar Y, with the ratchet-wheel U, and head K of the saw-frame, to produce an automatic feed for the carriage T, as set forth. l

In combination with the automatic feed-motion herein described, the lever b, spring c, latch 0l, and pin e,

for the purpose of disconnecting the said feed and arresting the forward motion of the carriage T, as and for the purpose set forth. i

JEROME FASSLER.

Witnesses:

TL J. PRINGLE, W.. BnowN.

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