US157989A - Improvement in sawing-machines - Google Patents

Description

w. w. DUFFIELD. sawing-Machines.

Patented Dec. 22,1874.

1HE RAPHIKZCO. PHOTO-LITHAESI; 4X PARK FLAC A 2 lSheets--Sheelt 2.

w. w. DUAFFIELD. sawing-Machines.

Patented Dec. 22,1874.

No.l57,989.

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WILLIAM W. DUFFIELD, OF HUNTINGTON, PENNSYLVANIA.

IMPROVEMENT IN SAWING'MACHINES.

Specification forming part of Lettere Patent No. 157,989, dated December 22, 1874; application-filed December 5, 1874.

To all whom it may concern:

Be it known that I, WLLIAM W. DUF- FIELD, of Huntington, in the county of Montgomery and State of Pennsylvania, have invented certain new and useful Improvements in sawing-Machines; and I do hereby declare that the following' is a full, clear, and exact description thereof, which will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to thatclass of sawing-machines intended for use in the shop of the wheelwright, joiner, or other workersin Wood, by means of which they are able to ac complish such work as sawing out fellies and other articles of irregular form, as well as slitting stud' for moldings and similar purposes, in much less time than it could be accomplished in the ordinary way by using the common hand or felly saw, the machine being operated, through suitable devices, by the foot of the personusing it; and the invention consists in the construction and arrangement of the different parts of themachine, as will be hereinafter fully described, and then specified in the claim.

Figure l is a perspective View of the machine complete. Fig. 2 is a section on the line :v of Fig. l., and shows the arrangement of the gearing, and special construction of the saw-arbor. Fig. 3 is a longitudinal section, showing the relative position of the different parts.

A represents the frame of the machine, strongly made of wood or iron, and carrying the horizontal table B, through which pass the vertical posts C. These posts are provided with guide-rods, upon which the vertically-reciprocating saw-frame D slides. Motion is impartedV to this frame, and by it to the saw E, through a pitman, M, one end of which is attached to the saw-frame, and the other to a crank formed in the 'shaft O. This shaft is provided at each end with a iiywheel, I, andalso has secured upon it a piuion, I?, which engages with the wheel K upon the shaft J, which revolves in suitable bearings upon the frame, and is also furnished with a crank near the middle of its length, attached to which is one end of the pitman L, the other end of the pitman being secured, by a pivotal connection, to the treadle H.

It is apparent, therefore, that a vibrating motion imparted to the treadle by the foot of the operator will produce a rapid reciprocating movement of the saw E, and, the material to be sawed, being retained in its proper position by the adjustable gage G and presserfoot a, is fed forward by the hand of the operator, thus enabling him to adjust the amount of feed exactly to the requiremen ts of the power and hardness of the material.

A pulley, R, is secured upon the shaft J, on which runs the belt S, driving' the circular saw F upon the arbor N. This arbor is of a peculiar formation, the driving-pulley b forming the saw-collar upon one side, against which the saw4 is firmly held by the nut c acting upon a screw-thread cut upon an enlarged part of the arbor, so that it shall pass freely over the shaft and its journal opposite to the drivin g-pulley.

rIhis method of constructing a saw-arbor will be found to possess many advantages, as by it neither the saw or driving-pulley overhang the bearings, therefore relieving them of unequal strains, which cause heating of the journals and buckling of the saws.

It will be obvious that the same mechanism which produces the reciprocations of the vertical saw will, with the addition of the pulley It and belt S, keep up a i rotary movement of the arbor and saw F, thus giving the operator a choice of either saw, as maybe best suited to the work upon which he is engaged.

Having thus described my invention, I claim as new, and desire to secure by Letters Patent, the following:

In a sawing-machine the circular saw F and arbor N, constructed as shown and described, in combination with the shaft O and reciproing saw E with its operating mechanism, the gears K I), shaft J, pitman L, and vtreadle H, substantially as and` for the purpose set forth.

In testimony that I claim the foregoing as my own I hereunto affix my signature in presence of two witnesses.

WILLIAM W. DUFFIELD.

Witnesses:

SAML. C. MILLS, J oHN BELL.

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