US150223A - Improvement in mitering-machines - Google Patents

Description

2 Sheets-Sheet1. B. BER N STEI N. M. H AM BU R G E R & A. KLEiN.

Miterng-Machines.

Patented April 28,1874.

fw z By d ATTURNEY are secured in the ordinary manner.

UNITED STATEs PATENT OFFICE.

BENJAMIN BERNsTEIN, MAX HAMBURGER, AND AcHILIE KLEIN, oE NEW YORK, N. Y.

IMPROVEMENT IN MlTERlNG-MACHINES.

Specification forming part of Letters Patent No. 150,223, dated April 28, 1874 application led `March 14, 1874.

To all 'whom it may concern.'

Be it known that we, BENJAMIN BERNsTEIN, MAX HAMBURGER, and ACHILLE KLEIN, of New York city, in the county of New York and State of New York, have invented a new and useful Improvement in Miterin g-Machines, of which the following is a specication:

Figure 1, Sheet l, is a top view of our iinproved machine. Fig. 2, Sheet l, is a front view of the same. cal cross-section of the same, taken through the line ma, Fig. 2. Fig. 4, Sheet 2, is a detail section, showing the manner of adjusting the bracket for supporting the saw-mandrels.

Similar letters of reference indicate corresponding parts.

Uur invention relates to an improved machine for mitering moldings for pictureframes and otherl uses, which forms two miters simultaneously.

A represents the frame of the machine, to the top of which are attached, or in it Aare formed, two slides or grooves, B, to receive the bases ofthe brackets C, said grooves B being arranged at right angles with each other, and at an angle of forty-five degrees with the length of the table. The brackets C are secured in place by a bolt, D, Fig. 4, which passes through a hole in the base of the bracket, and through a slot in the top ofthe frame or bench A, so that the said brackets may be moved forward or back, to adj ust them as may be required, by simply loosening` the bolts D. In bearings in the upper ends of the brackets C revolve the mandrels E, which are thus at right angles with each other, and to the outer or forward ends of which the saws F By this construction the saws F will be at right angles with each other, and as they become smaller, by loosening the bolts D they may be so adjusted that their forward sides may meet, as shown in Figs. 1 and 2. To the mandrels E are attached pulleys G, around which pass the belts H, which pass down through holes in the top of the table A, upon the opposite sides of the brackets (l, and around the drivingpulleys I, attached to the driving-shaft J, which revolves in bearings attached to the lower part of the frame A, and to which power Fig. 3, Sheet 2, is a vertimay be applied in the ordinary manner. The belts H are prevented from running off the pulleys I by making the face of said 'pulleys convex, and by the guide-pulleys K, the supports of which are adjustably attached to the frame A, so that the said pulleys may also be used for taking up the slack of the said belts. L is the table upon which the moldings are laid to be mitered, and which rests upon the top of the frame A. To the lower side of the table L are securely attached the upper ends of the racks M, which pass down through guides attached to the frame A, and into the teeth of which mesh the teeth of the small gear-wheels N, attached to the shaft O. The shaft O revolves in bearings attached to the frame A, and to it is attached a pulley or drum,

P, to which is attached one end of a strap, Q.

always to present a clean, smooth out, andpreventing all breaking out or splintering of said face, which is liable to occur where the sawin making its cut comes out of the wood. In the rear part of the table L is formed a right-angled notch, the sides of which are at an angle of forty-five degrees with the side of the table L, and are thusparallel to the saws. The sides ofthe said notch should be close to the outer sides of the saw, so that the molding may be supported close to the cut. S is the gage, against which the molding is held while being sawed. The gage S is made in two parts, the inner ends of which are beveled off upon their rear sides at an angle of forty-five degrees, so as to Iit against the sides of the saws F. 'l are bars placed beneath the table L parallel with and directly beneath the parts of the gage S. The bars T are connected with the parts of the gage S by bolts, screws, pins, or rivets, which pass through inclined slots U, formed in the table L, the slots in each end of the table L being made parallel with the plane of the saw F adjacent to said end. To the middle parts of the bars T are rigidly attached the rear ends of the racks V, which are parallel with the slots U, and the teeth of which mesh into the teeth of the small gearwhcels W, which wheels are made so long that the teeth of the rack-bar X may also mesh into the teeth of the said wheels W. The rack X passes longitudinally beneath the forward part of the table Z, and works in bearings attached to said table. B y this construction the gage S may be moved forward and back to adjust it to the width of the molding to be mitered by moving the rack X outward or inward longitudinally, the slots U and the arrangement of the operatingmeehanism keeping Jthe beveled ends of the parts of the gage all the time close to the saws F. The rack X is kept from being drawn inward by the press.

gage S. One or both of the parts of thc gage S may be groovcd longitudinally upon the front and rear sides to receive the stop Z, the forward side of which is beveled oii', so as to be parallel to the saw farthest from it, so as to receive and ft upon the sawed end of the molding as it is pushed in to adjust it for making another eut. A scale of division-marks may be formed upon the upper side of the gage S, for convenience in adjusting the stop Z.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. The combination of the gage S, bars T, toothed arms V, gear wheels W, and single rack X with the table L, upon which the 1nold- `ing is placed to be mitered, substantially as herein shown and described. 2. The combination of the toothed arm M, gear-wheels N, pulley or drum I), strap Q, and treadle R with the table L and frame A of a miter-sawing machine, substantially as herein Shown and described.

BENJAMIN BERNSTEIN. MAX HAMBURGER. ACHILLE KLEIN. Witnesses:

JAMES T. GRAHAM, T. B. M osuna.

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