USRE10152E - Signors - Google Patents

Description

fA. BRIDGMAN & J. L. PERRY.

I Assignors, by mes ne assignments, to said J. L PERRY and G. A. MATHER. WOOD POLISHING MACHINE.

No 10,152. Reissued July 11, 1882.

. l v z'nveni'am.

. I f Z W Attorneys.

fiihaets-Sheet. 1.

V 2 SheetsSheet 2. A. BRIDGMAN 86' J. L. PERRY. Assignors, by mesne assignments, to' said J. L. PERRY and G. A. MATHEE WOOD POLISHING MACHINE. No. 10.152.

Reissued July 11, 1882..

u k U Mifinesses:

- UNITED STATES PATENT OFFICE.

ALMON BRIDGMAN AND JAMES L. PERRY, OF BERLIN, WISCONSIN, AS-

SIGNORS, BY MESNE ASSIGNMENTS, TO SAID JAMES L. PERRY AND CHARLES A. MATHER, OF SAME PLACE.

WOOD-POLISHING MACHINE.

SPECIFICATION forming part of Reissued Letters Patent No. 10,152, dated July 11, 185 2. I Original No. 188,580, dated March 20, 1877. Application for reissue filed March 15, 1882.

JAMES LYMAN PERRY, of Berlin, in the county of Green Lake, and in the State of Wisconsin, have invented certain new and useful Improvemen ts in WVood-Polishing Machines; and we do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanying drawings, forming a partof this specification, in which- Figure 1 is a side elevation of our device. Fig. 2 is a vertical longitudinal section of the same, and Fig. 3 is a perspective view of the sand-paper cylinder.

Ourinvention relates to machines for fi-nishing or polishing wood; and it consists in the construction and novel arrangement of the several parts, whereby this object'may be accomplished, as more specifically described hereinafter, and pointed out in the claims, and whereby smooth and even work will be produced, whether the board to be operated upon be straight, serpentine,or circular. I

In the drawings, the letterAdesignates the frame of the machine, which should have a convenient'rectangular form and. be provided with suitable bearings for the gearing and mechanism hereinafter described.

Bis the feed table' or platform, having a transverse opening for the feed-rolls, guards, and sand-paper cylinder. I

(J 0 represent the feed-rolls, arranged in pairs, one pair on each side of the central opening, D, of the-feed-table and extending across the same parallel with the axis of the sandpaper cylinder. The journals of the feed-rolls O 0 turn in hearings in the lower portion of the arc-shaped ends of swinging arms E, of which latter thereare four in number, a pair being pivoted to the spindle b of the gearwheels F on each side 01'' the machine. Each of the feed-rolls U is provided with a gearwheel, a, on each of its ends, and these gearwheels mesh with cogs on the periphery of wheels F, which (the cogs) extend down along the inner faces of the wheels to form bevelgearing, by which they (the wheels F) are turned through the medium of a pair of shafts,

' d, on the ends of which are small bevel-wheels e e, theformer engaging with the gear-wheels F, while the latter engage with bevels c" on a horizontal shaft, f, a pulley, g, on which is connected with the power-shaft K by a belt, d. The feed-rolls O G are not adjustable independently of the arms E; but the outerends of the arms are adjustable to raise or lower the feed-rolls by the mechanism which I will now describe.

h h are branches that extend obliquely upbearings f f on each side of the frame of the 7 machine, and the'lower ends of the rods L are connected by a transverse rod-bearing, k, with which the bifurcated inner ends of the weigh tlevers N engage, the weight-levers having a constant tendency to throw the rods-Lop and cause them tolift the outer ends of the arms E, that are connected with rods L by the branches h, to carry the peripheries of the feed-rolls C out above the top of the tableB, so that when the stuff is fed into the machine it will be car ried away from the sand-paper cylinder, unless a sufficient pressure is brought upon it from above'by mechanism such as we will describe further on to cause it to depress the feed-rolls. Just above the bearings oft-he feed-rolls C we provide curved slotsin the arms E, and in these arms we secure the sliding bearin gs of presser-rolls G,'interposing rubber cushions a be tween said bearings and the upper termination of the slots. We also pass screw-bolts down through the tops of the arms against the cushions, by which to adjust them. These rolls 0' G serve to clamp the stuff downnpon feed-rolls- O, while the cushions a permit them to yield sufficieutly to avoid binding.

Intermediate between the presser-rollsG we journala large presser-roll, R, in bearings 9, that slide up and down in slotted standards h, and are adjustable vertically by means of screw-bolts g. The axis of presser-roll R is parallel to and on a direct vertical line with that of the sand-paper cylinder H, and the pressure of the stuff upon the sand-paper cylinder is determined by adjusting this roll up and down to cause it to overcome the lifting force of the lever N, acting through the arms a ward from vertical rods L, that reciprocate in E and feed-rollers C. These opposing forces are necessary in the production of fine work, for if the stuif were fed directly upon the sandpaper cylinder a pressure from above sufticient to produce an even contact from end to end of the cylinder would be of necessity so great as to cause the sand to grind into the stuff without smoothing it, and, besides that, the weight of the stuff would always be supplemented to the pressure from the roll above, and it would be impossible to so adjust the machine as to produce various degrees ofpressure from the slightest contact of the sand-paper that will merely polish to such a pressure as will reduce the thickness of the stud materially.

A shaft, k, is transversely arranged in bearings at the side of the rod It, and forms the fulcrum of the weight-levers. It is provided with arms I, which engage under the long arms of said weight-levers when its handle l is raised and serve to raise the same, allowing the feed-rolls to fall, and thus the feed-rolls may be simultaneously adjusted thereby as well as independently by means of the adjustin g-screws, hereinbet'ore described.

The sand-paper cylinder H is provided with spiral grooves m, in which are seated wedges to,-

which serve to clamp the edges of the sections of sand-paper and the layers under the same when secured by the screws s, which pass into the body of the cylinder. Over the sectional surfaces 11 of the cylinder, between the grooves,

are spread layers n p of wadding and rubber, over which the; sections z of sand-paper are laid. Inthismanner an elastic surface is built up, which aids materially in securing uniform and even work and prolongs the wear of the sand-paper, which, moreover, can be at any time easily detached and renewed should any 1 In this machine the principle of holding the work from the sanding-surface to a parallel bearing is designed to be practically carried out, and it is thought to be especially effective in the production of perfect work in smoothing ent, is

1. In a wood-polishing machine, the combination, with a sand-paper cylinder, ofapresserroll suspended above it in adjustable bearings, and yielding feed-rolls adapted to carry the stuff away from the cylinder and against the presser-roll, as set forth.

2. The combination of feed-'rolls' U, having stationary hearings in swinging arms, with presser-rolls having yielding and adjustable hearings in said arms above the bearings of the feed-rollers, as setforth.

3. In a wood-polishing machine, the combination, with the sand-paper cylinder and the parallel pressure-roll, of feeding-rolls automatically pressed toward said pressure-roll, as set forth. p

[4. The combination, with an adjustable pressure-roll parallel with the sand-paper cylinder, of the adjustable t'eedrolls and their swinging bearings automatically pressed by suitable mechanism toward said pressure-roll, as set forth.

5. The combination, with a spirally-grooved cylinder, of sections of sand-paper and spiral .clampingwedges.

In testimony that we claim the above we have hereunto subscribed our names in the presence of two witnesses.

. ALMON BRIDGMAN.

JAMES LYMAN PERRY. Witnesses E. M. BUELL,

GRIFF. J. THOMAS.

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