US60668A - John h - Google Patents

Description

.uithiitatrs strut @time l, JOHN H. BARNES, OF BROOKLYN, NEW YORK. I Letters Patent No. 60,668, dated January 1, 1867; anteoZatecZ December 2, 1.866.

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TO ALL WHOM IT MAY CONCERN:

Be it kno'wn that I, JOHN H. BARNES, of -Brooklyn, in the county of Kings, and State of .New York, have invented a new and usefui Improvement in Grooved Wheels, Rollers; or Pulleys and I do hereby declare that the following is a full, clear, and' exact description thereof, reference being had to the accompanying drawings,- and to the letters of reference markedgthereon, and making a part of this specification.

The character or nature of my invention consists in animproved construction'of grooved wheel, roller, or pulley, which can be made or produced, much cheaper than the ordinary grdvcd wheel, and in the use of which there is far less liability of the rope or; cord being thrown oii the wheel, and when oil, itcan be much more easily'r put on again. l v

Figure 1 represents a grooved roller. constructedaccording to my invention, and suitable to be applied to a window-shade.

Figure 2 represents a-wheel or pulley constructed on the same plan.

Figures 3 and 4 are edge views ofiig. 2, showing .the cord passing over it in two positions.l

Grooved wheels, pulleys, &c., as heretofore formed and constructed, have had in their periphery a continuous groove, for the reception of the rope or oord, or a groove, the sides or lips of whichare continuons or unbroken entirely around the wheel or pulley, A,s a necessary consequence of such form of construction, whenever the rope or\cord becomes lby any meausflifted or thrown up out of the groove, and upon or over the edge or top of the lip of the groove, the danger-or liability of the cord being thrown entirely oii' the wheel is continually increased as the wheel revolves, as there is nothing in the form either of the wheel or of its groove to check the cord or rope, or hold it in the groove. The construction or casting of a wheel or pulley with a continuous groove is also difficult and expensive, for the reason that the pattern which has'to be used in moulding cannot be made in one or a single piece, but is what is termed a divided pattern, that is, made in two or three separate pieces, and when the mould is prepared, ouepart of the pattern has first tobe removed, and then the flask containing the mould has to be turned over or'reversed, and the other part of the pattern removed. Much more time is thus consumed in moulding than would be required if the pattern was in a singlepiece, and could be drawn" from the mould without the necessity of reversing or turning it. This consumption of time in moulding increases necessarily the cost of construction. i My irrventionronsists in giving to the wheel or pulley suli a form of groove, that' any tendency of the cord or rohe td'pnss oii` from the wheel, even when it may get upon or over the top or edge of the groove, is counteractcd Iand. Yovercome, and s lich new form of groove also enables me to produce or manufacture the wheel or pulley mufiph cheaper than heretofore, as it renders it possible to construct, the pattern in a single piece, and such that'. it can be drawn from the mould, thus rendering'unnecessery the turning of the mould, and saving the time heretofore thus consumed. Instead of having the groove in the periphery of the wheel continuous, or with uniform and complete sides or edges, as heretofore formed, the sides of the groove are cut away at regularintcrvals and to uniform extents, as represented in the drawings, thus'forming a groove with regularly broken or intermitting sides. The opposite sides of the groove are also so cut away that the removed portions of one-side of the groove are opposite the portions of the other side of the groove that are not cut away. In the drawings those portions of the opposite sides of the groove which are not cut away, or which project, are indicated by the figures 1, 2, 3, 4, 5 6, 85e., and the corresponding portions which are removed are indicated by the letters a, Za, c, d, e, f, g, &c. 'Asi before stated, those `portions of the groove that are not removed are usually equal with eachl other, as are also those portions which are cut away; but such uniformity or regularity is not essential. The portions that are cut away from either side of the groove should', however, exceed some` what in length the portions that remain, and that stand opposite the places where such parts have been cut away, so as to allow of the drawing of the sand in moulding. If these were all equal in extent, the pattern could not be drawn without injuring or destroying the mould. More than one-half of each side of the groove may be so cutaway or removed, without affecting its action 'as such,thus making the wheel or pulley so much the lighter, and by so much also'reducing the eostof material. When a cord or rope is passed over a wheel having such an intermitting groove, or a groove with .broken sides, as is represented in iig. 3, it retains its proper position as well as when the wheel has a grooveivith .continuous sides, the arrangement of tue non-removed portions of the opposite sides making the groove .eqisival'gntto a continuons ane. If, however, by any chance, the cord or ropegets out of the groove, as shown in fig. 4, it will not he thrown entirely ofl the wheel, as it will be caught against or be stayedby the next projecting portion of the groove. The liability of the cord passing oil' the wheel is thus materially diminished, and the effect or tendency of such brokenfsidcd tgroove is to keep the cord on the wheel. When the cord has been purposely or otherwise thrown oil' the wheel, ouch form er construction of groove also enables the wheel to be quicker and easier banded, as the cord or band will catch over or upon any projectingr portion of the groove, and be at once carried upon the wheel by its revolution. Such form of groove also renders it possible, as before stated, to construct the pattern in a single piece, and such that ir can be drawn from the mould, and does away with the necessity of a divided pattern, and theturning or reversing of the mould to remove it. It therefore effects a very great saving in the cost et' constructing the wheel or pulley, by requiring So much less time in moulding, in addition to reducing the quantity of metal used in its manufacture. By these` two items or particulars, the cest of construction will be reduced, it is believed, full twenty per cent. When a pattern is what is called a divided pattern, that is, of two or more parts, each part has to be numbered, and in moulding care has to be taken that the several parts of each pattern are brought and used together, andas each part is used, it has to be carefully brushed, so that no dirt or sand shall be lei't in it to mar thc casting. These manipulations consume time and increase cost, all of which is avoided and saved in eases where the pattern can be made in a single piece, and can be drawn from the mould. The form of the groove hereinbefcre described, that' is, with broken or cut away sides, is also Vsuch :is to allow the Wheel er pulley to be struck up by suitable male and female dies, from sheet brass or other metal. The metal will first be cut out in Suitable shape, and its periphery divided to the depth ofthe required sides of the groove, and the blanlc then subjected to proper dies, by the action of which the divided parts of the periphery will be carried to the opposite sides of the wheel alternately, and properly. inclined and shaped, no as te l'orin the sides of the groove.

What I claim as my invention, and desire to secure by Letters Patent, is

A grooved Wheel or pulley, having the opposite sides of the groove entirely cut away or removed, substantially as described, se as to permit the wheel or pulley to be cast or struck up, substantially as and for the purt f tl PPS ,Se o* l JOHN H. BARNES.

Witnesses:

S. D. LAW, M. N. HUTcurNSoN.

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