US423578A - Mechanical motion - Google Patents

Description

2 Sheets-Sheet 1,

N m M W A TU M A PH (No Model.)

No. 423,578. Patented Mar. 18, 1890.

' (No Model.) 2. Sheets-Sheet 2.

B. F. STEWART. MECHANICAL MOT ION- No. 423,578. Patented Mar. 18-, 1890.

" UNITED STATES PATENT QEFICE.

BENJAMIN F. STEWART, OF CANTON, OHIO.

MECHANICAL MOTION.

SPECIFICATION forming part of Letters Patent No. 423,578, dated March 18, 1890. Application filed November 21, 1888. Serial No. 291,445. (No model.)

To all whom Z25 may concern:

Be it known that; I, BENJAMIN F. STEWART, a citizen of the United States, and a resident of Canton,- county of Stark, State of Ohio, have invented a new and useful Improvement in Mechanical Motions, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification.

My invention relates to improvements in u m ech anical motions; an d it consists in combining with a single pitman or link, one endof which is pivotally secured to the outer portion of a crank on a driving-shaft, the other end to a similar crank on a driven shaft, helpers interjacent said shaft at a distance from the central point equal to the throw of said cranks, by which the driven crank may be rotated in a direction opposite to the movement of the driving-shaft.

My invention also relates to and consists of the means provided to rotate the hereinbefore-mentioned driving-shaft and of operating additional machinery.

\Vith these ends in view my invention consists in certain features of construction and combination of parts, aswill be hereinafter described, and set forth in the claims.

Figure 1 of the accompanying drawings is a view in perspective illustrating my invention as applied to a grain-binder. Fig. 2 is a side elevation showing the cranksand links more fully and a sectional view of the helpers. Fig. 3 is a diagram illustrating the line traversed by the crank-pins and the fulcrumpin. Fig. 4 is an end view of the shafts, showing the pitman in elevation.

Similar letters of reference show corresponding parts in all of thefigures of the drawings.

For the purposes of the easel will describe my invention as applied to a grain-binder, A representing the binder-frame, in which are mounted parallel shafts B 0, having cranks D and E on their outer ends, substantially as shown. The shaft B will be known as the binder-actuating shaft and O as the knotter-shaft. The said cranks are connected by a link F, having a centrally-located pivot G to engage the helpers a a at the ends of the loop H on the Vertical portion b of the frame A.

In Fig. 1 is shown an application of my invention to a grain-binder, where motion is transmitted from the packer-shaft D to the binder-actuating shaft B by means of' coggear, the wheel on said shaft being an internal gearwheel driven by a spur pinion mounted 011 the packer-shaft D, the shafts B and D rotating in the same direction, the crank D and link F giving motion to the knotter-wheel shaft 0, causing it to be revolved in the opposite direction by the aid of the helpers a a. The crank turned to the right, the link F will carry the pivot G onto the helper a at the upper end of the loop H, by means of which the driving-power is applied laterally to the driven crank to help it over the dead-points.

The middle portion of the loop H is enlarged, so that the pivot G does not come in contact with that portion, but is free on both sides until the curved end .portions of the loop H are reached, that form the helpers a a. Except for the matter of strengthening the parts, the middle portion of the loop may be removed entirely, as it is in no other way helpful, as will be seen by the line 01 in diagram, Fig. 3, which represents the center of the line traveled by the pivot G, which in the course of a revolution of the shafts B and 0 describes an elongatedfigure 8, the drivingcrank having an even rotary movement, the driven and uneven movement beingfaster through the first and third quarter portions of the described circle than through the second and fourth quarters.

Starting with the cranks upward and moving in the direction of the arrows, when the driven crank-pin has moved from point 1 to 4, the pivot G will have moved out and along the line d to a point designated as d and the lower or driving crank pin will have traveled from 1 to 4 in its circle P, and when the driving crank-pin has reached the point designated as 6 the driven pin will have reached a point designated as figure 6 in its circle P, the pivot G having reached the point d where it crosses a line cl drawn through the centers of the circles P P, the points 1. representing the crank -'pins, and when the crank-pins have reached the points 7 in the circle the pivot G will have reached a point on the line cl designated as (1 thence to points 1 1, completing one-half of a revolution and showing one-half the figure of an elongated 8. As the sides can be of no service to prevent unnecessary friction, I throw them apart out of reach of the pivot G, retaining them only to strengthen the parts and to prevent violence to the pivot.

The Wrist-pins h may be integral with the link F, or, if preferred, made separate and secured therein, so as to turn freely in the cranks, by which arrangement the pressure will be brought on pins 72, and pivot G more nearly on a line, thus avoiding unnecessary twist or strain on the link and the pins.

The needle-shaft K is journaled in and supported by the binder-frame'A. On one end of said shaft is mounted a crank L. Said crank is secured to the driving-crank by the link M. v

The operation is as follows: The shaft B and its crank D may be operated by any of the well-known ways-in this case by the packer-shaft and intermediate gearing. Each revolution of the shaft B and crank D will cause the shaft 0 to revolve in the opposite direction, and by the aid of the link F, pivot G, and helpers a a, as the cranks come in line with each other and with the shafts, the pivot G, engaging the helper a for an instant, becomes a fulcrum over which the drivingpower is applied laterally by the use of the link F to help the crank E over the deadpoints, and by which movement the needleshaft K is rocked in its bearings to raise and lower needle by the use of the link M, connecting the cranks D and L.

I would not limit myself to connecting the link M to the crank I), as the same result may be attained by securing the one end of the link to the crank E, or, if preferred, to

the link F, as the object of this invention isto provide simple, inexpensive, and reliable means for rotating the shafts B and O in opposite directions and to rock the shaft K, as hereinbefore described.

For thepurposes of this application I make no claim on the binder, but show. it simply for the purpose of illustrating the application of my invention to a binder.

Having thus fully described the nature and object of my invention, What I claim as new, and desire to secure by Letters Patent, 1s

1. The combination, with the two oppositely-rotating shafts and their cranks, of the pitman having a pivot intermediate its ends and helpers situated at the ends of the throw of said pivot and adapted to act temporarily as fulcrums on which power may be applied laterally to the driven crank, said pivot being out of contact with said helpers and tree except at the ends of its stroke, substantially as set forth.

2. The combination, with the packer-shaft the pivot at the ends of its stroke, and a con.

nection between the crank on the second driven shaft and one of the other shafts, whereby the second driven shaft may be rocked as the other shafts are rotated, substantially as set forth. I In testimony whereof I have hereunto set my hand this 10th day of November, A. D. 1888.

BENJAMIN F. STEWART.

\Vitnesses:

W. K. MILLER OHAs. R. MILLER.

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