US260209A - Sawing-machine - Google Patents

Description

(No Model.) f

S. C. KENNEDY.

`SAWING'MAGHINB No. 260,209. a M Patented June 27, 1882..

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SAMUEL O. KENNEDY, OF WORTHINGTON, INDIANA.

sAwlNG--MACH-'INE- srEcrrrcafrrolv formingV 'part of Letters Patent No. 260,209, dated June 27, 1882. Application led November 22, 1881. (No model.)

part of this specitcation, in which- Figure lis an elevation of one side of my improved sawing-machine. Fig. 2 is an elevation of the opposite side, and Fig. V3 is an Fig. 4 is a detail view of the My invention relates to improvements in sawing,machines; and it consists in the peculiar construction and arrangement ofthe parts, as hereinafter more fully set forth.

In the accompanying drawings, a represents the top of a bench supported by legs b b.

To the upper face ot' the top a. ot' the bench is secured the open rectangular frame c,vthe

upper longitudinal side, d, of which is provided with the horizontal slot e.

g g represent posts secured tothe upper face of the top t of the bench and lying opposite cach other, in which posts g arejourna-led the parallel horizontal shafts 7L h', the former carrying the small cog-gear It, which meshes with the larger cog-gear, lc', on thelowershaft, h', to which rotary motion is imparted by a crank, t', or in any other suitable manner, to drive the saw. Y

To the inner end ot the upper shaft, h, is secured the balance-wheel j, to which is eccentrically pvoted the pitman l, the outer end of which is provided with a wrist-pin, m, which passes tbrough'the slot e in the upper side, d, of the open rectangular frame c,'andpthence passes through a hole in the horizontal `part of the saw-frame n, preferably made of iron to give it more weight to keep the saw pressed'l down to the timber to be sawed. The sawframe n has its inner end horizontal for a short| distance, and is then curved upwardly and then downwardly, as fully shown in the drawings, the saw o being inserted in the usual manner in the opposite ends of the part of the saw-frame n. l

To the front end of the saw-trame is secured a thumbscrew, by means of which the saw may be strained as desired.

curved i p p represent two opposite parallel posts, secured to the top a ot' the bench, each provided on its inner face with avertical groove, q.

rlhe vertical grooves q q on the inner faces ot' the posts p lie opposite each other, and receive vertical tenons r, formed on the longitudinal sides of a guide, s, adapted to be vertically reciprocated between the posts'p.

The upper end of the guide s is provided with a recess, t, in the lower end of which is journaled, on a horizontal axis, the friction-v roller u, on which the curved portion ot' the saw-frame n rests iu its reciprocations.

o represents a vertical kerf cut in the lower end of the guide, through 'which the upper edg'eof the saw o passes, the hert' guiding the saw in itsreciprocations.

The upper face ot' the curved portion of the saw-frame a is provided with a groove, a

which receives the free end'of a. spring, a2, secured at its opposite end to the upper side, d, of the rectangular frame c, whereby the saw is prevented from bouncing or moving upwardly when a rapid reciprocatingmotion is imparted to it. By this construction it will be seen that when, a rotary motion is given the lower shaft lr' by its crank i or by other suitable means a rapid horizontally-reciprocatin g motion is imparted tothe saw-frame and saw, which are guided in their reciproeations by the slot in the upper end of the guide and the kerfin its lower end; f

It' it is desired to give a slower motion to the saw, the cog-gears k It are reversed, the smaller cog-gear being secured to the lower shaft, h', and the larger cog-wheel secured to the upper shaft, h.

The support or buck-for the piece of timber to be sawed consists of two parallel opposite uprights, fw w', secured to the upper face of the top a ofV the bench.

' The upper face ofthe upright w is provided lwith a circular` recess, z, in which the log to be sawed rests, and a plate, a', provided with serrations on its upper edge, is attached to the Vinner face ot' the upright to, so that its .serra tions will project slightly above the bottom of the circular recess z and bite the log resting therein. The opposite upright, to', is provided with a longitudinal slot in its upper face, in vwhich is inserted and secured-a plate, b', having serrations on its upper edge projecting roo slightly above the upper face of the upright w and adapted to bite a log resting thereon.

c' represents a post secured to the upper face of the top a of the bench and lying opposite the opening between the uprights w w. The post c is provided with a vertical longitudinal slot for the reception of the shank of a dog, d. The shank of the dog is provided with a hole for the passage ofa pin, e', which passes also through holes made in the opposite laces ot' the post c', a series of holes being made in the post c,whereby the dog d is pivotcd to the post c and may be vertically adjusted thereon as desired.

The dog d' is made in the form of an are of a circle or similar curve, and is provided at the upper end of its curve with a plate, l', secured tothe end of the dog and provided with serrations adapted to bite the log when the dog is brought down upon it, as hereinafter explained.

To the lower end of the dog d is secured a cord, m', which passes thence through a slot in the top a ofthe bench and is secured at its opposite end to a grooved pulley, o', fast on a shaft, p', journaled in brackets secured to the lower face of the top a of the bench, and carrying a ratchet-wheel, q', fast on the shaft, and a crank, s', on its outer end.

1" represents a spring-pawl secured to one side of the top a, over the ratchet-wheel q', and adapted to engage therewith.

t represents a lever pivotcd to the side of the top a and provided with a projecting pin, u,lying under the spring-pawlt". By depressing the outer end of the lever t the pawl is raised `from engagement with the ratchetwheel.

'Q3' represents a dat spring, secured at one end to 'the post c,'its opposite free end bearing against the lower face of the dog d. By this construction it will be seen that by turning the crank s the dog will be brought to bear against the log to be sawed, the latter being securely held in place by the serrations on the dog and uprights or supports, and that after thelog is sawed by depressing the lever t the pawl will be disengaged from the ratchet-teeth, when 'the spring e will force up the dog d', so that it will no longer bear upon the log.

In order to raise'the saw-'frame and saw when desired and hold them when thus elevated, I.v

have invented the following devices:

a2 represents a horizontal shaft, journaled in the posts pp near their upper ends, and provided on its outer end with the wheel b2, pro-` vided with the handle c?, and carrying the -pul` the outer face of one of the posts p and lying directly under the wheel b2, so that in its nor mal position its periphery will not be in contact with the wheel b2, leaving the latter free to rotate, but when the wheel lz is partially revolved its periphery will bear against the periphery of the wheel b2 and prevent it from rotating. The wheel Z2 is provided with a 11andle, m2.

n3 represents a rod secured at its inner end to the outer face of the wheel l2 and provided at its outerend with an eye, through which oneend of a double-crank rod, o2, passes, the latter being pivotcd in staples secured to one of the posts p and having its opposite end lying over and in the path of a pin, p2, secured in one of the side faces of the guide s.

g2 represents a button secured to the front face of one of the posts p.

To the outer end of the button q2 is secured a spring, s2, the outer free end of which bears against one end of the double crank 0'L to hohl it away from the wheel l2 while the saw is in motion. By this construction it will be seen that the saw-frame and saw can be raised, when desired, by turning the wheel b2, and in the upward movement of the guide s, carrying the saw-frame, the pin p2 will strike one end of the double crank o2, revolving the latter, which, through the rod ua, will partially revolve the wheel Z2, causing it to partially rotate and bite the wheel b2 and prevent it from turning, thus holding the saw-frame and saw in an elevated position.

'lo lower the saw-frame the eccentric wheel must be turned back, the wheel b2 being held stationary while the eccentric is turned back, and then lowering the saw-frame by turning the wheel b2.

What I claim as luy invention isn l. The combination, with the reciprocating sawframe n, supported by a guide and provided with a groove, n', in its upper face, of the rectangular frame c and spring n2, secured at one end to the stationary frame, and having its opposite free end pressing in the groove of the saw-frame, substantially as described, and for the purpose set forth.

2. The combination, with the pivotcd curved dog d', provided with a cord, m', ot'the shaftp, having grooved pulley o' and ratchet-wheel q', springepawl r', lever t', having pin u', and spring e', substantially as described, and for the purpose set forth.

3. The combination of the guide s, having the pinpz, and adapted to slide in grooves in the postsp, and carrying the saw-frame n, shaft a2, carrying the wheel b2, pulley d2, strap h2, eccentric wheel lt, rod n, and double-crank rod o2, substantially as described,and for the purpose set forth.

SAMUEL C. KENNEDY. Witnesses:

ANDERSON F. Fox, Gnd?. STONE.

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