Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS615019 A
Publication typeGrant
Publication dateNov 29, 1898
Filing dateJun 17, 1897
Publication numberUS 615019 A, US 615019A, US-A-615019, US615019 A, US615019A
InventorsErastus F. Hershaw
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Motion-converting device for windmills
US 615019 A
Previous page
Next page
Description  (OCR text may contain errors)


(Application filed June 17, 1897.)

(No Model.)

w: noRRls new. cu. wow-mum, WASHINGTON. n c




SPECIFICATION forming part of Letters Patent No. 615,019, dated November 29, 1898.

Application filed June 17, 1897- Serial No. 641,109. (No model.)

To all whom it may concern.-

Be it known that I, ERASTUS F. HERSHAW, a citizen of the United States, residing at Abingdon, in the county of Knox and State of Illinois, have invented certain new and useful Improvements in Windmills; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters of reference marked thereon.

The present invention has relation to certain novel improvements in a motion-converting device for windmills; and it consists in the several details of construction, substantially as shown in the drawings and hereinafter described and claimed.

Figure 1 of the drawings is a side elevation of a windmill, showing my improved motionconverting device connected therewith; Fig. 2, a detail horizontal section taken on line 1] y of Fig. 1.

In the accompanying drawings I have shown a wind-wheel, which may be one of many forms to which my invention is applicable, in order to better illustrate the mechanism embodying the converting motion and its connections.

In the drawings, A B represent two circular bands, between which the concavo-convex sails C are suitably pivoted, said bands forming the skeleton frame of the wheel. The sails O at their inner ends have pivotally connected thereto suitable rods e, the opposite ends of the rods being similarly connected to rotatable disk D, whereby the movement of the disk will operate the sails to close or open or partially close them. The disk is loosely mounted on the central shaft E, and above and below said disk are similar disks a, to which suitable brace-rods are connected. A crankrod F connects with the disk D to move and operate it, said rod being pivoted to the upper one of the disks a, and to the crank end of the rod is loosely connected the lower end of the coupling-rod cl, which latter rod connects with a weighted lever G. A coupling-rod g connects with the rod F, the lower end of said coupling-rod connecting with a coupling-rod h. The rod it connects with a tubular sleeve II, which sleeve is adapted to vertically slide on the smaller diameter of the shaft E, the sleeve passing down through an opening in the rotatable head I, which head is supported upon the upper end of a suitable tower K of the windmill.

The sleeve H has a bearing-plate '5, over and upon which extends a pressure-arm L, provided with eyes I at its ends to encircle the guide-rods M. V The pressure-arm L connects with a suitable wire N, which wire is of suitable length to be in convenient reach of a person on the ground.

When the wire N is pulled down upon, the pressure'arm L will force down the tubular sleeve H, and through the medium of the coupling rods hereinbefore described the weighted end of the lever G will be raised, and through the crank-rod F the sails will be acted upon.

The wheel is provided with the usual vane O, which connects with the rotatable head I through the medium of the arm 0, and a suitable hood P may be used to shield part of the wheel from the wind, said hood connecting with the head I by means of the rod or arm 13.

The wind-wheel, with its attachments, as above described, is simply shown in detail to illustrate a complete windmill with all its parts, that it'may better and more clearly show a more complete and practically-operating windmill in all its parts in connection with the motion-converting device which constitutes the essential feature of the invention. I therefore wish it understood that the windwheel and its attachments above described may be modified or changed without departing from the principle of the invention, the essential features of which I will now proceed to describe.

A cylinder R is suitably keyed to the shaft E, which may be of any preferred diameter, said cylinder having a double spiral groove 0", which extends in opposite directions, and engaging this spiral groove is a projection or stud s, which extends from the inner side of a yoke S, and through the ends of this yoke extends the guide-rod M.

Suitable rods T are connected at their upper ends to the yoke S and connect in any suitable manner with the pump operating mechanism.

As the shaft E rotates it carries with it the cylinder R, and by means of the double spiral groove 0' and the projection or stud 3 engaging therewith the yoke S will have imparted to it a vertical reciprocating motion, and through its connection with the pump the latter is operated.

A very simple and effectual attachment to a windmill is provided by which rotary motion can be converted to a vertical reciproeating motion through the connections with the horizontally-movable wheel of the windmill.

Having now fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4212463 *Feb 17, 1978Jul 15, 1980Pratt Enoch BHumane bleeder arrow
US5882319 *Aug 21, 1996Mar 16, 1999Bristol-Myers Squibb CompanyLavage instrument
Cooperative ClassificationF03D3/00, F16H25/12