US64665A - Freeman hanson - Google Patents

Description

initentatr atrnt @fitte Letters Patent No. 64,665, dated lay 14, 1867.

i IMPaevBD TURN-TABLE.

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Be it knownthat I, FREEMAN IIANSON, of West Buxton,`in the county of York, and State of Maine, have invented a new andnimproved Method of Raising the Centre of Turn-Tables; and I hereby declare the following to be a full, clear, and exact description thereof, which will enable othersl to make and use my invention,lrefer ence being had to the accompanying drawings, forming. part of this specification, in which- Figure 1 is a side elevation of `a portion of a turn-table showing my improvement.

Figure 2, a betteln plan of the top or swinging port-ion of the turn-table, showing the movable plate and friction-rollers. .l

Figure 3, a top plan of the bottom or fixed part, showing the socket and track for the rollers.

Same letters shew like parts.

In an application heretofore made by me, upon which Letters Patent of the United States were issued August 28, 1866, I claimed a turn-table in an enclosed pit, te bemovcd bythe weight of the car or engine imposed thereon, the said pit having an inclined bottom. The present application is for Letters Patent upon certain improvements upon said invention. Experience has proved that some appliance is necessary, with the patented invention above named, by which the centre, or parts'near the centre, can be raised when,y desired, as in use the table will sink or sag at the centre, and its easy and ready revolution-which is very necessary-will be, by the friction consequent upon such sinking, much impeded. My invention has also relation to a' method of supporting the centre of .the revolving part of thetable. Without-the improvement I am about to describe the swinging or upper part of the table must be often adjusted by levers, props, and screws, temporarily applied` thereto, and with considerable labor and expense. My invention has for its object the obviation of these objec tions to the constructionand operation of the subject-matter of my previous patent.

I willrst designate the different vportions of my improvementby letters, and then proceed to describe the uses and application of the same.

A showsa base which is intended to rest upon the inclined bottom ot' the circular pit described in my previous application before referred to. B is a portion of the revolving part or top of the table. No moreof this -lastmentioned part is shown inthe drawing than is necessary to illustrate my present improvement, but this part is of course intended to extend the whole diameter of the pit, and has at its ends wheels upon which it runs, said wheels running on the inclined bottom of the'pit. This is fully set forth in ,my previous application and patent. Z) shows a plate attached to the upper side of A, and having a projection with a hollow end or socket, g. c shows a plate attached to theunder side of B, and having a projection, z, to fit into the hollow g. These two, L and g, form the centre upon which B revolves. Upon B I rigidly attach a second plate, fm, dotted lines in iig. 1. The plate chas on its upper side four projections fitting into holes in the plate m, (seef, figs. 1 and These projections are not connected with the upper plate m, but are arranged so as to slide in andout, as hereinafter described. Their oHice is simply to keep the plate c in position under the plate m, and to cause the plate c to revolve with B. CZ shows friction-rollers running on the circular track a, and they may be attached either to B near the centre thereof, or tothe movable plate e. 7c shows four screws passing down through 13, through the fixed plate lm,and bearing on the upper side of the movable or adjustable plate e. By turning these screws inward or downward it is apparent that their ends pressing upon c will raise the partB from the adjustable plate c, the projectionsf remaining in the holes made for their reception in the platem and in Il. Thus the centre of B, when, by reason of the great weight of engines, it has sunk or become depressed, can be readily and easily adjusted. The object of the friction-rollers (Z is to relieve the pressure and friction at the centre, or on L and g.

I have specified e, I, and m as being plates, but I do not desire to confine myself` to simple plates` of metal for this purpose, but to-any equivalent form of construction to answer the purpose. Neither do I desire to set forth that two friction-rollers wilt alone be employed, although I consider that number sufficient, inasmuch as the revolving part B is supported by the wheels at its two ends, which wheels run, as before described, on the' inclined bottom of-the pit, not shown in the accompanying drawings, because patented before, and not herein claimed. The rollers herein specified and claimed are different from, and intended to be used at the same time with, but not for the same purpose as, the rollers described in my previous patent. The single object of the above-named and described devices is to prevent depression and consequent friction at or neainthe centre of the e4,es5 '2 revolving part B. I do not claim the inclined turn-table previously patented, and the principle ofthe invention covered by the said previous patent to me. The screws 7c een be operated and constructed in :my of the ordinary and well-known forms. I do not claim providing a turn-table with n. ball-nnd-socket pivot, neither dovI claim the combination of n plate, standard, cross-piece, und ball, when employed asset forth in the patent of J. L. Kinsey, No. 51,192; neither do I claim :t cap, used in connection or applied to the ball and socket pivot of a. turn-table. My invention has in view simply a, combination of devices for the easy elevation of those parte of my improved turn-tnble which lie nbeutthe centre thereof. V

What I do claim, and desire to secure by Letters Patent, is- '.lhe arrangement of the plate c, having its projections f, its perth, und wheels d, plate b, and projection y, all ns :rnd for the purposes described, when the said plate c is operated by means of the four screws 7c, in thev inn-nner herein set forth. v

FREEMAN IIANSON.

Witnesses: WILLIAM Hnxnr Cmrronn, HENRY C. Hoesrox.

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