USRE2868E - Improvement in crank-pins and boxes for harvesters - Google Patents

Description

UNITED` STATES PATENT OFFICE.

THOMAS WELCH, OF GHURCHVILLE, NEFV YORK.

Specification forming part of Letters Patent No. 49.183, dated August 1, 1865.; Reissue No. 2,868, date-d February 11, 1868.

To all whom it may conce/rn:

Be it known that I, THOMAS WELCH, of Churchvilledn the county of Monroe and State of New York, have invented certain new and useful Improvements in Crank-Pin Boxes and Crank-PinsforReapingandMowingMachines; and I do hereby declare that the following is a full, clear, and description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specication.

Figure l represents a longitudinal section through the box and crank-pin. Fig. 2 is a front elevation of the parts, with the upper serrated joints, J, of the pitman R shown in section. Fig. 3 isa detached face view of the joint-plate of either end of the connecting-rod.

One of the greatest obstacles met with in the operation of reaping and mowing machines is in being unable to prevent the crank-pin and box from heating and cutting out,77 and the great cause of that is inefficiency ofthe means heretofore known or ,used to lubricatc that part of the machine, while it is necessarily run at a high rate of speed, and is constantly exposed to dirt and dust which will settle in the joints. l

My invention is intended for and eiectnally obviates these difficulties, and is provided with a fountain, which, being filled with oil, steadily and constantly allows the pin to be lubricated. or an equivalent device, which prevents the leakage of unnecessary oil, and allows the fountain to be filled whenever so desired. The pin is also inclosed in the box in such a manner that oil can circulate around it, and grit and dust cannot enter, nor can any quantity of oil escape therefrom. The connection made between the cutter-bar and pitman is of such a nature that they can be adjusted easily and readily as the parts of the joint become worn by the operation ofthe machine. The connection of the cutter-bar and pitman commonly known, being formed by opening in the two, with a pin passing through them, is such a one that there is no means by which the wear caused by the friction of the two can be compensated for. By means of the joint employed in my invention it is only requisite to adjust the screw, which passes through or partially rlhis fountain has a suitable screw-cap y through the parts, so as to force the sections together.

In the annexed drawings, Arepresents a section of the ordinary crank-shaft of a reaper and mower.

B represents a balance-wheel.

C D represent the crank-pin and box.

E represents the connecting-rod.

F represents an end portion of the knife-bar.

G represents an oil cup or reservoir, and H represents a tight cap over the end of the crankpin.

The oil-reservoir G may be of any suitable form and secured to the crank-pin box'in any suitable position, so as to allow the oil to coinniunicate with the crank-pin C. The tight cap H, being secured or otherwise attached to the end of the box, effectuall y prevents the escapement of oil at this part and keeps out dirt and grit. l1`he projecting rim d of the wheel is provided iu part as au addition al preventive for the escape of oil, but more especially to prevent the ingress of dust and grit into the joint, also to strengthen the box. I J in Fig. 2 and 3 represent the male and female joints which are used for connecting the pitman to the cutterbar. These parts areshown more clearly where the 'connection is made between the pitmau and crank-pin box.

It will be understood that the knife-head is provided with a socket, aud the pitman is provided with a suitable plate or projection for entering and filling within said socket, or vice versa. The parts of the joint f g are lmade spherical on the one and concave iu the other, or are made conical on the one and a corresponding socket in the other, or they may be made to connect together by a taper pin to a corresponding socket, all of which are substantially as represented, and accomplish the same ends in substantially the same manner. The main object is to connect the parts described by a joint having a bolt passing into or through them, so that as the operation of the machine wears the parts of the joints they may be readj usted together by tightening the bolt. The mere fact as to whether the joint and socket77 are more or less tapering or rounding, or whether there is an under stud projecting beneath the oval or tapering surface, is immaterial. The bolt which secures the parts of the joint may pass through both of said parts, or may he screwed into the one after having passed through the rst. Upon thisbolt Iprovide a Washer of any suitable material, and should the bolt not be used to pass through both parts of the joint the washer may or may not be placed under the head thereof. This Washer gives a greater bearing-surface to and prevents the holt from Working loose, as well as compressing thejoint. Leather, iron, india-rubber, or other similar substances generally used for Washers may be applied in this instance.

Having thus fully described my invention,

what I claim as new, and desire to secure by Letters Patent, is-

l. The crank-pin box of a harvester With Rueil-reservoir, G, for the purpose set forth.

2. A crank-pin box or head,'D H, of a harvcster, soconstructed with. reference to the crank-pin C that the outer end of said pin will be enveloped by the head D H, for the purposes -set forth.

3. In combination `With a crank-pin box provided With an oil-reservoir, a screw-cap, G, or its equivalent, for the purpose of allowing the reservoir to be lled with and prevent the escape of unnecessary oil therefrom.

4. The pitman E and knife-head F, connected by the taper screw-head g and socket f, or their equivalents, and the bolt which passes into or through the parts, as set forth.

5. In combination with the connecting parts gf and bolt, as specified, a Washer, in the manner and for the purposes set forth.

THOMAS WELCH.

Witnesses:

C. M. ALEXIiNDER, J. M. MAsoN.

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