US155853A - Improvement in machines for dressing moldings - Google Patents

Description

. 2Sheets-Sheet2. J. G. BRANDON.A

Machines for Dressing Moldings.

No.i55,`853. Patented 0ct.1 3,174.

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Mig waavz@ 7% n I M UNITED STATES PATENT OFFICE.

JOHN C. BRANDON, OF DETROIT, MICHIGAN.

IMPROVEMENT IN MACHINES FOR DRESSING MOLDINGS.

Specification forming part of Letters Patent N0. 155,853, dated October 13, 1874; application tiled April 18, 1874.

To all whom 'it may concern:

Be it known that I, JOHN C. BRANDON, of Detroit, in the county of Wayne and State of Michigan, have invented a new and valuable Improvement in Machines for Dressing Moldings and I do hereby declare thatv the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure l of the drawing is a representation of a longitudinal vertical sectiontof my machine; and Fig. 2 is a plan view of the same. Fig. 3 is a transverse vertical sectional view, and Fig. 4 a sectional detail.

This invention has reference to machines for dressing moldings, the surfaces of which are 'coated with plaster-of-paris. It consists in endless carrying-bands combined with adjustable clamps and guides, and with cutters or planers, whereby the molding-strips are regularly and steadily ted up to the work of dressing their edges. It also consists in com bining, with stationary planes, which are arranged in gangs, adjustable bearings, which will fill up the spaces left by the successive removal of the shavings, and thereby prevent vibration or trembling of the molding while passing the planers, as will be hereinafter eX- plained.

In the annexed drawings, A designates the frame of the machine, and B B two horizontal octagonal rollers, whose shafts have their bearings in said frame. Around these rollers two endless belts or carriers, C O, are applied, which are composed of rigid sections or links jointed together, and which are supported at the top of the frame A by means of a table, E, and held between vertical guides b b. These carriers are revolved by the application of power to a belt-wheel, W. D D designate two clamps, which present rolling snrfaces against the outer sides of the two carriers C O. The clamp on one side of the table E is stationary; but the clamp D on the opposite side of this table is adjustable by means of a hand-wheel screw. By means of this screw a molding-strip, M, placed on railways c c, can be clamped between the carriers with a sufcient pressure to cause them to move it on said ways up to gangs of planers. The upper horizontal bearers of the frame A are extended out from the main portion of the frame, and have secured to them a bed, E', which is in the same plane as the bed E, andover which the railways c c are carried. G G designate two'planer-stocks, which are adjustably secured upon the bed E in planes parallel to each other, and to the railways, and which are throated to receive plane-irons i, which are arranged at proper angles to remove shavings from theedges of the moldin g-strips passed between them.

I have represented two gangs ot planers, in each one of which three planers are applied; but I may omit one gang, and substitute in its place a bearing composed of rollers, and I may use a greater or less number of planers. In front of the cuttingedge ot' each planer, t, is a bearing-plate, g, which is adjustable by means of a setscrewhi; these plates g are set so that they will bear against the edges of the molding in front of their respective plane-irons i, and these aii'ord side snstainers, which will eiiectually prevent the molding from trembling while being dressed by the plane-irons.

The tirst set of plane-irons are intended for roughing the work, and the last pair ot' these irons for removing a thin shaving, and leaving the work smooth and nished.

Practice has demonstrated that prepared moldings cannot be dressed by rotary planeirons, for the reason that they necessarily strike the work coneussively, and break the plaster; they also leave the edges ot' the moldings uneven and unfinished.

By my invention there is no jar or concussion, and the molding is dressed closely and neatly, without liability of cracking the plaster finish, or of breaking off portions of this plaster.

In carrying my invention into effect, I shall employ means for positively holding the work down upon its railways, and for this purpose I prefer to adopt the holdingdown devices J, represented in the drawings, which are adjustably attached to bearin gs K, which are mounted upon and rigidly secured to the frame A. These holders J may be made of various shapes, adapted to the form of the molding to be dressed. Theholders represented are in-V tended to bear upon the molding M on the `bottom of the central groove e formed'therein.

VVhat I claim as new, and desire to secure by Letters Patent, isf 1. The carriers C C, supported and guided as described, in combination with the clamps D D, one of which is adjusted by means of a screw, a, all constructed and arranged substantially in the manner and for the purpose described.

2. The adjustable bearings g, in combination with the plane -irons t', substantially in the manner and for the purposes described.

In testimony that I cla-im the above I have hereunto subscribed my name in the presence of two Witnesses.

JOHN CLARK BRANDON.

Witnesses FLoRENs KREGKE, JAMEs LOVE.

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