US48185A - Improvement in planing-machin es - Google Patents

Description

///Lii mf//W/f//y/m Y JMU? /f Fam-fifi Jim /51 MM.

A M. PHTO-LITHU. C0. MY. (OSBORNE'S PROCESS) UNITED STATESA PATENT 'OFFICEo HENRY A. LEE, OF WORCESTER, MASSACHUSETTS.

IMPROVEMENT IN PLANlNG-MACHINES.

Specification forming part of Letters Patent No. 48, l S5, dated June 13, 1865.

To all 'whom 'it may concern:

Be it known that I, HENRY A. LEE, of the city and county ot' Vorcester, and State of Massachusetts, haveinvented certa-in new and useful Improvements in Molding-Machines; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation ot' the same, referenceV being had' to the accompanying drawings, in Which- Figure l represents a longitudinal vertical` section through 'said molding-machine. Fig. Figs. 3 and 4 represent detachedviews, hereinafter to be referred to.

My invention relates to certain improvements on the molding-machine patented by me October 13, 1863.

. To enable others skilled in the art to make and use my invention,Iwill proceed to describe i its construction andtoperation.

A represents the main frame ot' the machine. `IB represents the table or bed-plate on which Vthe articles to be molded are supported.`

C represents the vertical cutter-heads, the

cutters of which operate upon the edges ot' the ofthe vertical cutter-heads, to hold and conduct the stu' while the cutters are at work.

To make this operation more perfect I use an additional pair of feed-rolls, G, which act upon the stuff in conjunction with the feed-rolls F; but by having the feed-rolls G between the cutter-heads C their action greatly insures not only the feed of the material, but also the direct-ion in which the stuit' is fed by pressing it more rmly against the guides or rests H.

I and K represent horizontal pressure-bars, which are supported on adjustable stands Land M in front and to the rear of the horizontal cutter-cylinder D. They are provided respectively with shoes N and O, which press the stuff iirmly to the bed while it is acted upon by the cutters ot' the cylinder, and it is very essential to a i'iert'ect operation ot the machine that these pressure-bars and shoes should be set as closely to the cylinder as the length ot' the revolving cutters permits. For this purpose the bolts a, b v which the stands L are secured to the bed-plate, pass tllroughslots b of the bed-plate, and I also secure the stands M ot' the bar K to the tra me ot' the cutter-cylinder by means ot` slotted ilanges or lugs d., through which the bolts f pass. Thus the frames or stands of both pressure-bars are made adjustable from and toward the cutter-cylinder D. The height ofthe pressure-bars K I and their shoesN O is made adjustable by means ofthe screw-rods P, the heads g ot which rest upon the framesM It, while the screw-spindles pass loosely through said frames and through the ends of the pressure-bars I K, but work in the screw-nuts m, Fig. 3, which are set upon the upper and lower sides of the ends ot the pressure-bars. The screw-spindles P ot the fra-me L extend downward beneath the bed-plate, where to each of' them a weigpted lever, Q., is secured, the front point, h., of which bears against a projection,t`,of the main frame,wh`ilc the weight R presses the long arm of the lever downward, and thus causes the shoe N to press upon the stuft'. arrangement the pressure of the shoe N upon the stuft' is the same, whether the trame L is moved from or to the cylinder D, as thcleverage of the lever Q remains unchanged, owing to the fact that the spindles P can be moved freely through the slot in the bed-plate, while the point h of the lever, which constitutes its bearing, can slide on the lower edge ot' the projection 1I.

As shown at Fig. 4, the ends ofthe pressure bars K I, which are in contact with the screw nuts m, are rounded off. This is for the purpose of enabling said 'pressure-bars and their shoes to assume oblique positions in case the stuE to be acted upon should be thicker on one edge than on the other, so that it will be iirmly pressed upon the bed-plate, which would not be the case it' the pressure-bar could not deviate from its horizontal position, in which latter case it would bear upon one edge only of the stuit'.

As the machine should be adapted to Work stuft' of different dimensions, and with the ap- It will be noticed that by this plication of cutters of various sizes, it is desirable to make the bearing of the. cylinder-.cutterD adjustable, sothat said cylinder can either be secured at any desirable height, or so that it can be moved while working to operate upon stuit whose thickness is variable. This I effect by securing the journal-boxes S of the cylinder-cutter upon its frame or stand T by means of screws which pass through slots o in the frame, as shown at Fig. 3, and said screws are to be tightened when the cylinder is to be secured at a certain height.

E represents the cutter-cylinder, which is used for planing the lower side of the stuit. On thiscutter-c linder I use knivesfor thepurposeof springing moldings upon the under corners of the stutf which is not required'to be planed on the under side. rIhis operation has been performed heretofore by means ot' suitable cutters attached to the vertical cutter-heads, and has been attended w-ith diiticulty, inasmuch as the points ot' the cutters, when so fastened and operated, are liable to become dull and worn off, thus leaving the molding in a rough condition. By my arrangement such molding can be sprung with ease and neatness; but as the cutters employ ed for this purpose have to be of greater length than those used for planing the bottom, it is evident that the aperture or mouth in the bed-plate in which the cutters revolve must be enlarged. This is attended with the difficulty that thin stutf cannot be properly worked on a large mouth ofthe bed-plate, as it springsy and yields too much. l To avoid this difficulty I use an adjustable mouth in the bed-plate, which consists ot` the pieces p, which are inserted into the bed-plate 'when thin stuft' is operated upon on which no moldingV is sprung on the lower corners, but which are removed when the latter operation is to be performed, and a wide mouth, q, is left open, through which cutters of suflicient length can operate to spring moldings upon the lower corners. l

In that class of work where the molding is sprung upon the under corners itis not necessary to planethe undersurt'ace, as that is placed V next to the building and is not seen, the top vand sidesonlybeingexposed. As before stated, the only plan adopted prior to my invention was to place the cutters upon upright heads; but as such cutters, when so placed, were constantly working against the grit and dust on the board or stuft' they soon became rough or worn olf, so that the molding was left in an imperfect condition. By my plan the cutters Working up againstV the advance ot' the stuft' always keep sharp and leave the moldings smooth and true. Another advantage of my improvement consistsin the fact that the moldings are to be cut at the same time that the upper face and the sides are Worked or molded.

Having thus. fully described the'nature of my invention, what Iclaim herein as new, and desire to secure by Letters Patent, is-

l. The combination, with the horizontal cutter-cylinder of a molding-machine, of an adjustable automatic press ure-stand, whereby the pressure of theshoe upon the stuft' remains the same, whether the stand is removed to or from the cylinder, substantially as and for the purposes stated.

2. The combination, with the adj ustable stand L, ot'pressure-bar I, screw-shat'tP, and Weighted leversQ, substantially as and for the purposes specified.

8. In combination with the adjustable pressure-bars K, the adj Listing-screws P andrscrewnuts m, operating against the rounded ends ot' thebar K, as and for the purpose specified.

4. In combination with the stand M, the slotted flanges d, when secured to the standard T ofthe cutter-cylinder D, to make it adjustable thereon, as and for the purposes specilied.

5. In combination with the cutter-cylinder E, Working under the bed B, the adjustable mouth-piece p in the bed-plate, by whichmoldings can be cut on thelower corners ot' the stuiie while the sides and face are Worked,as herein shown and described.

HENRY A. LEE. Witnesses:

THos. H. DODGE, GEO. H. MILLER.

Images