US661204A - Spring-straining device for harvesters. - Google Patents

Description

m. mum. Patented Nov. 6, I900. T. s. saowu.

SPRING STBAINING DEVICE FOR HARVESTERS,

(Application filed Mar. 27, 1900.)

(Wu Model.)

Units trio a THOMAS S. BROWN, OF POUGHKEEPSIE, NEW YORK, ASSIGNOR TO THE ADRIANOE, PLATT & COMPANY, OF SAME PLACE.

SFRING-STRAINING DEVICE FOR HARVESTERS.

SPECIFICATION formingpart of Letters Patent No. 661 ,204, dated November 6, 1900.

Application filed March 27, 1900. Serial No. 10,352. (No model.)

T0 (11 whom it may concern:

Be it known that LTHOMAS S.BROWN,a citizen of the United States, and a resident of Poughkeepsie, in the county of Dutchess, in the State of New York, have invented a new and useful improvement in Spring-straining Devices for Mowers, of which the following is a specification.

This invention relates to the spring device which is used in mowers for balancing or carrying the weight or part of the Weight of the inner portion of the cutter mechanism. In this class of spring devices a lifting-spring is arranged lengthwise on the grainward side of the pole and connected at its front end to the pole and at its rear end to the downwardly projecting short arm of an elbow-lever, which has its forwardly-projecting long arm connected by a chain with the gag-lever, which is arranged at the inner end of the cutter mechanism. This lifting-spring, which is under considerable tension, inclines rearwardly to the elbow-lever and exerts considerable downward pressure upon the front end of the pole. When the driver occupies the seat, which overhangs in rear of the axle,thisdownward pressure is practically overcome by the overhanging weight of the driver, which tends to lift the front end of the pole. WVhen the driver leaves his seat,the tension of the spring causes the front end of the pole to bear down upon the horses. The object of my invention is to overcome this difficulty by providing a simple straining device for the spring, which enables the driver to relieve the spring tension by a quick movement when he leaves the seat, and by which the spring can be again strained quickly to the required tension when required.

1n the accompanying drawings, Figure 1 is a side elevation of my improved straining device applied to a mower, viewed from the grainward side and showing the parts in the position in which the spring is strained. Fig. 2 is a side elevation of the straining device in the same position, viewed from the stubbleward side. Fig. 3 is a side elevation of the straining device in the released position, Viewed from the grainward side. Fig. 4 isa sectional front elevation of the straining device on an enlarged scale.

Like letters of reference refer to like parts in the several figures.

A-represents the draft-pole of a mowingmachine, which is secured with its rear end to the frame A. The latter is supported by an aXle a and wheels (1 and is providedwith a seat a which is arranged in rear of the axle. I) represents the elbow or carrying lever, which is arranged 011 the grainward side of the pole, near the rear end thereof, and pivoted on a stud c. The long arm I) of this lever projects forwardly and is connected by a chain 61 with the gag-lever, (not shown,) so as to carry the inner end of the cutter mechanism. The short arm Z) of the elbow-lever projects downwardly and is connected by a rod b with the foot-lever b 1 represents the lifting hand-lever, which is pivoted concentric with the elbow-lever. F represents the lifting-spring, which is arranged lengthwise along the grainward side of the pole and connected at its rear end with the short arm of the elbow or carrying lever. All of these parts are constructed and arranged in any suitable or well-known manner-t'or instance, as shown and described in Letters Patent No. 594,596, granted to Adriance, Platt & Oompany,as assignee of myself,November 30,1897.

The front end of the lifting-spring F is connected with the pole by the straining device which forms the subject of this invention and which is constructed as follows: G is a handlever which is pivoted to the pole. The pivotal portion g of this lever is arranged transversely and horizontally on the under side of the pole and journaled in a bearing H, which is secured to the pole. the lever projects from the pivotal. portion 9 on the grainward side of the pole and is oonnected with the front end of the lifting-spring, while the long arm g of the lever is arranged on the stubbleward side of the pole. The short arm is arranged at an obtuse angle to the long arm, so that when the lever is in an upright position, as shown in Fig. 3, the short arm projects downwardly, while when the long arm is swung downwardly and back- The short arm g of Wardly, as shown in Figs. 1 and 2, the short arm projects forwardly and upwardly. In the lastnamed position of the lever the lifting-spring is strained, While when the lever is in its upright position'the lifting-spring is released. In order to strain the spring, it is only necessary to swing the long arm of the lever backwardly until the short arm has passed beyond the dead-center. In this position of the parts the tension of the spring holds the lever securely in its depressed position. I prefer, however, to provide the le ver with a locking contrivance, by which it is positively held in its depressed position against accidental displacement, and by which the lever can be held in one of several intermediate positions for regulating the tension of the spring. This locking contrivance consists of a notched segment I and a locking-pawl K, Which engages therewith and is operated by a rod 1, bellcrank lever Z, and spring Z The segment is arranged on the stubbleward side of the pole and for convenience is formed in one piece with the pivotbearing II of the lever.

I claim as my invention o 1. The combination with the pole, the carrying-lever and the lifting-spring attached at its rear end to said carrying-lever, of a straining and releasing lever mounted on the pole and connected with the front end of the lifting-spring, substantially as set forth.

2. The combination with the pole, the carrying-lever, and the lifting-spring arranged along the grainward side of the pole and connected at its rear end to the carrying-lever, of a straining and releasing lever mounted on the pole and having its short arm arranged on the grainward side of the pole and connected with the front end of the lifting-spring, While the long arm of said lever is arranged on the stubbleward side of the pole, substantially as set forth.

3. The combination with the pole, the carrying-lever, and the lifting-spring attached at its rear end to said carrying-lever, of a straining and releasing lever mounted on the pole and connected with the front end of the lifting-spring, a spring-pressed locking-pawl carried by said lever, and a locking-segment secured to the pole and engaged by said pawl, substantially as set forth.

\Vitness my hand this 24th day of March, 1900.

THOS. S. BROWN.

Witnesses:

HOWARD A. SoMERs, CHARLES LOUIS PULSIFER.

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