US811124A - Molding-bit. - Google Patents

Description

PATENTED JAN. 30, 1906.

J. BOYD. MOLDING BIT. APPLICATION FILED MAE.15, 1905.

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PATBNTED JAN. 30, 1906.

J. BOYD. MOLDING BIT. APPLICATION FILED MAR.16, 1905.

2 SHEETS-SHEET Z.

1 I I I r l I 4 4 r 0 ll JOHN BOYD, OF BESSEMER, ALABAMA.

MOLDlNGw-BIT.

Application filed March 15, 1905.

T0 all whom, it may concern:

Be it known that I, J OHN BOYD, a citizen of the United. States of America, residin at Bessemer, in the county of Jefferson and State of Alabama, have invented. certain new and useful Improvements in Molding-Bits, of which the following is a specification.

This invention relates to working-machines of the type sometimes termed wood-rnolding machines, designed for the manufacture of wood-molding strips.

To this end the invention primarily has in view a novelv construction and arrangement of molding-bits in conjunction with suitably adjusted and disposed bracing-guides to provide means for adapting the ordinary doublesurfacing woodworkingmachine for dressing a plurality of molding-bits out of a single plank or board as it passes through the ma chine.

With these and other objects in view, which will more readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination, and arrangement of parts, which will be hereinafter more fully described, illustrated, and claimed.

The essential features of the invention involved in the novel construction and arrangement of molding-bits and the bracing-guides associated therewith are susceptible to structural modification without departing from the scope of the invention; but a preferred embodiment of the latter is shown in the accompanying drawings, in which-- Figure 1 is a diagrammatic sectionalview of a double-surfacing planer-machine equipped with the improvements contemplated. by the resent invention. Fig. 2 is a plan view of the same. Fig. 3 is an enlarged detail perspective view showing the lower rotary cutter with its improved bit shown in operative relation to the bracing-guide and the molding-strip being manufactured. Fig. 4 is an enlarged. elevation showing the upper and lower sets of molding-bits in complemental relation and illustrating the quarter-round molding cut thereby. Fig. 5 is an enlarged detail end view of one of therotary cutterheads, showing the method of attachment of the molding-bits thereto. Figs. 6 and 7 are detail elevations, res ectively, of an uper and a lower molding-git such as employer in the present invention.

Like reference characters designate corre- Specification of Letters Patent.

Patented Jan. 30, 1906.

Serial No. 250,138.

spending parts in the several figures of the drawings.

In carrying out the present invention the improvements contemplated may be adapted to any ordinary type of double-surfacing molding-machine in which rotary cutters are arranged above and below the plane of the feed-table and which cutters are operated. by the usual driving devices. Also in machines of this type suitable feeding mechanism is employed for passing the timber through the machine in a plane between the upper and lower cutters; but as no claim is made herein to the means for driving the cutters nor to said feeding mechanism there is simply shown in the drawings for illustrative purposes a portion of the stand 1 of a double-surfacing mol-ding-machine, which stand carries the usual horizontal feed-table '2, upon which is fed the plank or board M through the medium of a feeding mechanism. (Not shown.)

In adapting the improvements to a machine of the character referred to no change is required in the construction or location .of the upper and lower rotary cutter- heads 3 and 4, which are respectively supported to operate in planes above and below the feedtable 2, though, as usual in machines of this character, the bits of the lower rotary head 4 operate through a cutter-slot 5, provided in the feed-table, so as to expose the under side of the board M to the action of the lower cutter.

The upper and lowerrotary cutter- heads 3 and 4 are disposed in different vertical planes and are provided in the flat faces thereof with longitudinally-disposed T-shaped slots 6, designed to adjustably receive therein. the correspondingly-shaped fastening-bolts 7 for the molding-bits, and in carrying out the present invention a pair of molding-bits are associated with each cutter-head, one pair of bits constituting a complete set for each head.

Referring to the upper cutter-head 3, the present invention provides for applying to the diametrically opposite sides of such head through the medium-of the fastening-bolts 7 a pair of molding-bits 8, each consisting of a flat plate having in one edge thereof adjustmentslots 9 to receive the fastening- .bolts 7 and provided along their working edges with a continuous series of straight V- shaped beveled planer teeth 10. A plural number of planer teeth 10 is always provided along the working edges of the upper molding-bits 8, according to the number of quarter-round individual molding-strips to be cut from the board or plank, and at this point it will be observed that, restricted only by the length of the cutter-head, any number of the separate molding-bits 8 may be employedin any event providing means for dressing off in one operation the upper angu lar side portions of the strips to be formed out of asingle board or plank. A corresponding construction and arrangement prevails in connection with the lower rotary cutterhead 4. However, the lower bits 11, applied to diametrically opposite sides of the lower head 4, are provided in one edge with adjustment-slots 12 for the fasteningbolts and along their Working edges with a plurality of continuous curved V-shaped bits 13, whose curved portions are not only bev'eled, but struck on arcs, each of which is a quarter of a circle, to provide means for dressing the lower side of the plank into quarter-round strips, as plainly shown in Fig. 4 of the drawings.

The number of teeth 13 on the lower bits and also the number of lower bits correspond to the teeth and number of the upper bits, so that the complete upper and lower sets of bits usually bear a true complemental relation.

Directly above the plane of operation of the lower cutter-head 4 and also immediately in front of the plane of operation of the upper cutter-head guide, the separate bracing-guides being des ignated, respectively, by the reference-numbers 14 and 15. Each of the bracing-guides 14 preferably consists of a Wooden section of the board as dressed by the upper rotary cutter alone, thus presenting at the lower surface of each of said guides a V-shaped angular corrugated guiding-face 16, registering in the correspondingly-corrugated upper side of the board or plank. Each of the wooden bracing-guides 14 is rigidly secured to the fiat under side of a brace-holding head 17, provided with an upstanding slotted carryingarm 18, receiving a shiftable adjusting-screw 3 is arranged a bracing 19, arranged to work in a longitudinally-disposed slot 20, formed in a horizontally-disposed supporting-bracket 21, carried upon the stand or framework of the machine. The head of the adjusting-screw 19 is preferably held in a keeper seat or channel 22, formed longitudinally in one face of the bracket 21.

From the foregoing it is thought that the construction, operation, and advantages of the herein-described machine will be readily apparent without further description, and it will be understood that various changes in the form, proportion, and minor details of construction may be resorted to without departing from the spirit of the invention or sacrificing any of the advantages thereof.

Having thus described the invention, what is claimed, and desired to be secured by Letters Patent, is

In a double-surfacing molding-machine, the combination of ahorizontal feedtable, of upper and lower cutter-heads arranged respectively above and below the plane of the table and in different vertical planes, said cutter-heads being spread a distance apart, molding bits adjustably fitted to the upper head and provided with a succession of straight V-shaped teeth, molding-bits adjustably fitted to the lower headand provided with a succession of continuous curved V- shaped teeth, a vertically and horizontally adjustable holder arranged over the feedtable directly above the lower cutter, a similarly-adjustable holder also arranged over the feed-table on one side of the vertical plane of the upper cutter, both of said holders having fiat brace-holding heads, and a wooden bracing-guide rigidly secured to each holdinghead, each wooden bracing-guide consisting of a Wooden section of board dressed by the upper rotary cutter alone.

In testimony whereof I afliX my signature in presence of two Witnesses.

JOHN BOYD.

Witnesses:

W. M. DOYLE, F. L. EMIL.

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