USRE1546E - Improvement in converting motion - Google Patents

Description

4 are perspective views of one' of' the devices whichI use as e substi besides,

' the objections named, and y UNITED STATES JIlARLES-L. SPENCER IMPROVEMENT IN Co .Spoemcution lbrmingpart of Letters RPatent N September To all whom it may concern:

Be it known that l, CHARLES L. SPENCER, of New York, ot' the county and State of New York, have invented a new and useful Ir nprovement in the Devices for Converting a Re ciprocating Motion into a Continuous Rotary Motion; and I do declare that the following is a full description o1' the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon. y

Figure I is a perspective view of the whole arrangement. Fig. 2 is a view ofmy iinproved donble connecting-bar. Figs. 3 and 4 tute for the wellkiiown crank. Figs.` 6, 7, and 8 are parts to be re ferred to hereinafter.

My improvement rela rentions"I Whose i bbjei well-known crank Werke and treadle, and is of u where it is desired to 0 in one direetion'onl crank 4worked by the tle diliculty to a pe tes to that class o1' 1n is to supersede the" d by a connecting-bar se inv those instances btain a rotary motion y. Vhile the ordinary treadle may present litrson accustomed to its use, it is not easily controlled by one notaccustoincd thus to its use. In the en'iployment of sewingmachines, for example, operated in thisway quite as great annoyances are experienced .by tllosewho only occasionally use them-from turning the driving-shaft in the wrong'direction and from the necessity ofobserving that the crank is in the right position at starting, as from any other canse. It is, often desirable to run the machine very slowly when commencing to sew certain kinds of work, and this, with the crank-Inotion, cannot be readily done by an inexperienced person. In all the arrangements ot' devices to be substituted for the crank with which I am acquainted the above-mentioned diilicnlties have been avoided only by the szwriticefof speed, for while it is often advantageous yto start the machine slowly, it is equally desirable that it should be capable of running as rapidly as if worked by the crank.

To devise a substitute for the crank-andtrendle motion which shall'not be-liable to et shall produce of speed, is the object of my as high a ratel invention.

In the accompanying drawings, A, Figrl,

o. 'au ,0:51, dated March 4 small roller, F,

PATENT OFFICE.

,or NEW YORK, N. Y

NVERTlNG MOTION.

, 1863; Reissue No, une, dame is a fragment of the shaft of the machine to i. be driven. Upon this shaft I place, at a-convenientd is tance apart, (say, one-half ineli and arranged to work in opposite directions, two common pawl and ratehetwheels, or, instead thereof, two trietion-pawls, constructed as follows: Y

I cast a cup-shaped piece of metal, as shown at B, Fig. 3, provided with a. hub, M, made to tit the shaft A, to which it may be secured by a set-screw, a, shaft. I then make a. disk of metal in the forni shown at Figs. 4 and 5, upon 'the inner" surface of which' is the raised projectiouf the periphery of the raised portion D being scored out in the form of a, curved incline, as shown atE. Thegdisk C ,and cup B arethenl fitted t0 website, therese@ porties-Qns; in'giclosed by tne'nange of thejeup and e'apable of being turned easily within it. The two, when fitted together, present the appearaneeshown in Fig. 1, the diskC being free to revolve around' the. shaft A. I now place a 'in `the 'deepest part of that portion ot' D which yis cut away, the diameter` of the roller being such that when the disk is turned on the shaft Ain cile direction it will present no obstruction; but if turned in the i opposite direction it will be carried farther ,l along the inclined plane E, and consequently bind the disk U to the cup B, whereby any motion given to the disk-plate O will be imparted to the shaft to which the cup `B is secured, v

Figs. G, 7, and are views' of similar devices involving the same principle, but which need not be described more minutely, as they are not claimed in this patent, all'being, so far .as the eiect isconcerned, the equivalents ofthe ordinary pawland-ratehet motionfftowhich my inyen tion is equallylapplicable, the-former,f however, being preferred on'acconnt 'of being accompanied by less noise iii-operation;` y

111 order to work-the friction-pawls whichI have described, as Well as to work the ordis; nary pawls and ratchets, it' the latter be used instead of the former, I use a, double connect-gw ing-rod, G G, one leg of which, at itsuppell extremity, is connected by a wrist-pin tattile;- disk-plate L of one friction-pawl, .fandf he. other leg is similarly ,connected to er'dis plate L"` of, the other frietiongpawl l' in any desired position on the'y ,legs are connected toward their lower extremthe upper extremity of eaeh eonneeting-rod a ity at J by a pin. A treadle is pivoted as it l would be to an *ordinary shackle-bar. Near curve is made as shown at o o, in order that i tbe rods, when at the extremity of their upward throw, may embrace the shaft A, and thereby obtain a greater range of, motion than could possibly be secured it' they were not so curved. At any convenient place above the point where the two rods are united I plane a spring, I, the tendency of which is to spread the rods apart, and consequently assist in preventing the two sets of pawls from remaining on a dead-center when the two are set on the 5 shaft nearly together;- and 1 also plaee bei tween the two'rods a spring-butter, Il, whieh subser've's the saine purpose as the spring', and also ln'events the disagreeable eliek from the rods striking' together when the maehine is worl-:ed rapidly. y

It will be seen that by thel use o'l' the ein-ved connecting-rods G ('l and Ithe spring l, or ils equivalent, the saine eii'eetban be proibita-,d upon the shaft for every upward and downg Ward'lnotion of the treadle as can be obtained from' the eoniinon crank. lly the use ol the l the crankl possesses'is retained, while at the Sametime lthe advantage is scoured of being able to impart a slow, positive movement to the shaft at all times and in one direction only.

I do not elaiin making the upper extremities of a pair ot' connecting-rods curved so as to embrace the driving-shaft; but

What l do elaim, and desire to secure by Letters Patent ofthe United Sta-tes, is-

The use of the (spring I, or its equivalent, in lcombination with the enrved connectingrods (l l, for the purpose el' enabling' the operatingvpawls to be so adjusted as to obtain an eii'eet. upon the shaft equal tothe action ot' the eran'k, wlilethe danger of haugin,( upou the dead-point is prevented, substantially as described.

l GllAS. L. SPENCER.

Witnesses.

'EDWIN T. Conni. v EDWARD B. Puur.

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