US614924A

US614924A - Thomas bearman

Info

Publication number: US614924A
Authority: US
Publication date: 1898-11-29
Anticipated expiration: 1915-11-29

Description

Patehted Nov. 29, I898. T. BEARMAN.

LUMBER CIRCULAR SAW MACHINE.

(Applic ation filed Dec. 27. 1897.)

(No Model.)

52 M I f Mlnepgep. C a a [nVeuZarz U ITED STATES PATENT OFFI E.

THOMAS BEARIWIAN, OF OWEN SOUND, CANADA.

LUMBER CIRCULAR-SAW MACHINE.

SPECIFICATION forming part of Letters Patent No. 614,924, dated November 29, 1898. Application filed m r 27, 1897. Serial No 663,576. (No model.)

To all whom it may concern.-

Be it known that LTHOMAS BEARMAN, manufacturer, of the town of Owen Sound, in the county of Grey, in the Province of Ontario, Canada, have invented certain new and useful Improvements in Lumber Circular-Saw Machines, of which the following is a specification.

My invention relates to improvements in lumber circular-saw machines more particularly adapted for the sawing of logs; and the object of the invention is to design a simple, compact, economical, and efficient form of ma chine by which a thin small saw may be utilized for the sawing of logs in various ways and a great saving in timber and power thereby effected; and it consists, essentially, of a suitable stationary frame provided with a swinging frame, at the front of which the saw is held flush 011 the end of cross-shaft, which derives motion from a belt from the main driving-shaft, the swinging frame being adjusted, preferably, by means of screw-spindles deriving movement through a bevel-gear and'shaft and belt from the main shaft and the log being turned and fed and the parts otherwise constructed and arranged in detail, as hereinafter more particularly explained.

Figure 1 is a perspective view of my improved circular-saw machine. Fig. 2 is an enlarged detail of the saw and adjacent cutter and means for adjusting same. Fig. 3 is an enlarged sectional perspective detail of the joint at the top of the screw-spindles. Fig. 4 is a detail of the trunnions through which the screw-spindles pass. Fig. 5 is a detail of the hollow trunnions upon which the swinging frame is pivoted. Figs. 6, 7, 8, 9, 10, 11, and 12 are end views of logs, showing the various cuts which may be accomplished by my circular-saw machine.

In the drawings like letters and numerals of reference indicate corresponding parts in each figure.

A A are the side bars of the frame. the end bar.

B B are the vertical standards, and O is the crossbar at the top of the Vertical standards.

A is a cross-bar extending between the side bars A.

A is a bar extending from the cross-bar A to the end bar A,

A is

which are pivoted on the trunnions E E.

F is a cross-bar connecting the swinging side bars F.

G G are trunnions secured to the outer ends of the side bars F F and to the inside of the bars and formed similarly to the trunnions E E.

H is a supplemental swinging frame provided with sidebars H and an extended end bar H which is provided with a jaw h, the members of which extend to each side of the saw I, so as to steady it, the saw being shown in dotted lines in Fig. 1.

J isthe saw-shaft, which is suitably supported in journals j on the end of the side bars F of the swinging frame, such shaft extending through the hollow trunnions G. The end of one side bar H of the supplemental frame II is provided with a handle it and has a spring-plunger connected to such side bar which is designed to be brought into engagement with one or other of the notches of the quadrant g, attached to the end of the side bar, so as to adjust the supplemental frame II to any desired level, whereby the jaws 7L may be brought into proper central position near the cutting edge of the saw.

K is a pulley (shown mostly in dotted lines) secured to the shaft J.

L is a pulley secured to the main shaft. The pulleys K and L are connected together by a belt Z.

M is an open frame pivoted on the studs m, journaled in the bearing-brackets m.

N and N are spindles journaled in suitable bearings in the sides of the frame M, and n and n are pulleys which are suitably held in frictional contact with each other.

11. is a pulley journaled on the shaft N, adj acent to the pulley n.

O are screw-spindles, one only of which is shown, extending and screwed through the trunnions o,pivotally held in bearing-brackets O, secured on the side bars F of the swinging frame. The bearing-brackets O are provided with slots 0', so as to allow of a limited swinging movement of the screw-spindles O. The side bars F are also slotted for this purpose.

P are ways, preferably of metal in arc-shape form, secured to the side of the standards B B, one only being shown, but the other is at the opposite side of the far standard. P are bearing-blocks which rub against such ways and hold the swinging frame from lateral vibration.

The upper ends of the screw-spindles O are provided with bevel-pinions 0 which are suitably secured onto thespindles and balls 0 which have hearings in sockets Q, formed at the center of the top of the bearing-brackets Q, as indicated.

R is a counter-shaft supported in suitable bearings r, secured in the top of the crossbar 0 and provided at the end with bevelpinions R, which mesh with the bevel-pinions 0 at the upper end of the screw-spindles 0. As the pulley and socket at the top of the spindles O are directly in line with the center of the shaft B, it will be readily seen that the bevel gea-r-pinions O and R will mesh perfectly with each other no matter in what position the screw-spindles 0 may be swung.

S is a pulley secured on the rod R, connected by a belt 8 to the pulley n on the spindle N.

T is a lever pivoted on the quadrant-frame t, designed to mesh with one of the three notches t of the quadrant. The quadrantframe T is secured at the base by suitable bolts to the flooring or frame of the building in proximity to the supplemental swinging frame 11. The lower end of the lever T is pivotally connected to a rod T, which is connected at the opposite end to the lower end of the frame M.

U is a pulley secured on the main drivingshaft D opposite the pulleys n and n. In the position in which the lever T is shown in the drawingsthat is, in the front notch of the quadrant If-the pulley N is brought in frictional contact with the pulley U on the main shaft. By throwing the lever T opposite the second notch both pulleys n and n are disconnected from the shaft. By bringing the lever Topposite the nearest notch shown in the drawings the lower pulley n is thrown against the pulley U. Now as the pulley U is located on the driving-shaft it will be seen that if the pulley m is against the pulley U the drivingshaft, revolving in the direction indicated by arrow, will impart motion to the pulley n and n causing the belt S to move in the direction indicated by arrow and communicating motion to the bevel-pinion 0 in the direction indicated by arrow, thereby raising the swinging frame on account of the screw-spindles 0 being caused to move downwardly through the trunnionso. hen the pulley n is brought against the pulley U on the main shaft, such pulley n will cause the pulley n to rotate in the opposite direction, and consequently drive the pulley S in the opposite direction, and consequently the spindles 0, thereby causing the screw-spindles to pass upwardly through the trunnions 0, and consequently lowering the swinging frame. It will thus be seen that by manipulating the lever T the swinging frame may be raised and lowered to any desired position, and therebybrin g the saw either above or below the log 2, which is held on a carriage 3, longitudinally movable on a track a. By throwing out both frictionpulleys 'n and n the swinging frame will of course remain stationary and hold the saw so. The supplemental frame H may be also adjusted so as to bring it level, and consequently the jaws 7t, substantially on a line with the horizontal plane of the saw when cutting.

The log 2 is held in lathe-points 5, supported in the brackets 6 on the carriage. A quadrant 7 is also provided with equidistant notches, with which a lever 8 is designed to coact, such lever being removably secured on the square end of the lathe-point and pro vided with a spring-plunger 9, designed to be brought into engagement with the notches in the quadrant. relation to the quadrant the log is simultaneously turned and held in any desired position for the various ways of sawing logs, such as indicated in Figs. 6 to 12, in which Fig. 6 shows, diagrammatically, the saw in position for trimming the log. Fig. 7 shows the position the saw assumes to cut clapboards; Fig. 8, an octagonal cut; Fig. 9, a cut into the center of a large log, the saw be- -ing intended to be raised into the upper positi on and lower position to effect the cutting of the lumber in this manner; Fig. 10, a quarter-cut; Fig. 11, sawing the log into boards by giving four turns to the log and by sawing from above or below, and Fig. 12 another alternative form.

In turning the log around of course the lever 9 would have to be moved from the square end of the lathe-point, so as to completely turn the log.

In Fig. 2 I show the saw supported on the end of the disk 10, to which it is bolted by countersunk bolts, the outside of the saw being flush. Suitable cutters 11 are provided in proximity to the saw secured in position within notches in collars 12, which are located on the hub 13 and through which the key 14 extends. The collar 15 is provided with a circumferential groove, such collar being secured to the cutter-collars. 16 is a lever pivoted at 17 and having a pin 18 extending into a groove in the collar 15. By swinging the lever the cutters may be moved longitudinally on the hub out of position, so they will not operate. Ordinarily these cutters are used to trim the rough outside edge of the log.

By adjusting the lever in From this description it will be seen that I am enabled to use in a machine such asI describe a very small and thin saw and to out small or large logs, whether rough or smooth, in various ways. Formerly such logs were cut by very large thick saws, and consequently a great deal of the lumber was wasted in sawdust. By my machine this is entirely avoided. It will also be understood that on account of using the small saw I can effect a great saving of power. On account of the compactness of my machine it may be also readily moved from place to place.

What I claim as my invention is 1. In combination, the main frame, the swinging frame, the main drive-shaft, the saw, the standards, the cross-piece supported thereby, the supplemental shaft supported thereby driven from the main drive-shaft, a bevel-gear fixed to the supplemental shaft, a

bracket extending transversely of said crosspiece having a socket in line with the end of the supplemental shaft, a screw-spindle ha"- ing a bulbous head held in said socket, a gear carried thereby meshing with the first gear and a pivotal screw connection between said screw-spindle and said swinging frame, substantially as described.

2. In a lumber-sawing machine, in combination a suitable frame, a swinging frame, a saw located at the outer end thereof on the end of a suitable shaft, suitable uprights supported on the frame suitable bearings on the side bars of the swinging frame slots in the bearings, screw-spindles screwed through the trunnions bevel-pinions at the upper ends of the screw-spindles, a ball-and-socket hearing for the upper end of the screw-spindles, a counter-shaft provided with bcvel-pinions meshing with the bevel-pinions at the upper end of the screw-spindles, the pulley on the counter-shaft, the pulley on the main shaft, the minor swinging frame having two spindles with abutting friction-pulleys, a supplemental pulley on one of the spindles of the abutting friction-pulleys and a belt connecting such supplemental pulley to the pulley on the counter-shaft as and for the purpose specified.

. 3. The combination with the stationary frame and swinging frame the shaft supported in suitable hearings on the end of the swinging frame, the saw secured on the end of the shaft, the hollow trunnions secured to the inside of the side bars of the swinging frame and through which the saw-shaft extends, the supplemental frame having the side bars pivotally swung on the outside of the hollow trunnions through which the sawshaft extends, the end extension-bar of the supplemental frame provided with jaws, the handle end of one of the 'side bars of the frame, the quadrant on the side bars of the swinging frame in proximity to the saw-shaft and the springpressed plunger coacting therewith and operated from the handle on the end of the side bar as and for the purpose specified.

4. In combination the main frame, the uprights, the screw-spindle extending through the side bars of the swinging frame, the bevel-pinions, the counter-shaft, pulley on the counter-shaft, the pivotally-supported pulley-frame provided with abutting frictionpulleys journaled on the spindles, the supplemental pulley on the same spindle as one of the friction-pulleys, the pulley connecting the supplemental pulley to the pulley on the counter-shaft, the main shaft and frictionpulley thereon, the rod connected to the lower end of the piVotally-supported pulleyframe, the lever connected to the forward end of the rod in proximity to the supple mental swinging frame and an independent notched quadrant-frame suitably supported and on which such lever is pivoted and with which it is designed to coact as and for the purpose specified.

5. In a lumber-sawing machine, the combination with the saw secured on the end of the saw-shaft with the outer face flush, of the cutters on the inside of the saw held in position by suitable collars, a grooved collar to the outside having longitudinal movement on a key, a lever and pin extending into the groove on the collar for throwing the cutters laterally upon the shaft as and for the pur pose specified.

THOMAS BEARMAN. Witnesses:

B. BOYD, A. MOADAM.