US551876A - Wood-sawing machine - Google Patents

Description

(Nb Model.) 2 shets--sheet 1.

` F. E.A &`IE. L. SHORE. l i WoonshWING MA-cHlNE. N0. 551,876. Patented 13630.24, 1895 (No Model.) 2 sheets-sheet 2.

F. E. 8u E. L. SHORE. WOOD SAWING MACHINE.

Patented Dec. 24, 1895.

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FREDRICK E. SHORE AND EDVARD L. SHORE, OF ELDON, IOVA.

WOOD-SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 551,876, dated December 24, 1895.

Application filed April 24, 1895. Serial No. 547,025. (No model.)

To all whom it may concern:

Be it known that we, FREDRICK E. SHORE and EDWARD L. SHORE, citizens of the United States, residing at Eldon, in the county of I/Vapello and State of Iowa, have invented a new and useful VVood-Sawing Machine, of which the following is a specification.

This invention relates to an improvement in sawmills.

The object of the present invention is to simplify and improve the construction of sawmills with a view to rendering the same capable of being mounted upon and carried by a traction-engine of any usual or preferred type.

One of the objects of this invention is to construct a machine-frame in such manner that it is adapted to be located and carried in advance of the traction-engine, and to be supported and suspended relatively to the boiler of said engine in a simple, strong and effective manner.

Afurther object of the invention is to mount the saw and its shaft in a reciprocating frame, and to provide means operatin g in connection with said reciprocating frame forvautomatically vibrating the same for advancing and withdrawing the saw.

A further object of the invention is to provide the machine with changeable-speed gearing and means for throwing the same into and out of engagement, whereby the reciprocating saw-frame may be vibrated at the desired speed or thrown entirely out of operation, when required.

To accomplish the objects above enumerated, the invention consists in certainnovel features and details of construction and arrangement of parts, as hereinafter fully described, illustrated in the drawings, and pointed out in the claims.

In the accompanying drawings, Figure l is a perspective view of a traction-engine with a portable sawmill applied thereto and constructed in accordance with the present invention. Fig. 2 is a front elevation of the same. Fig. 3 is a transverse vertical section through the sawmill-frame, showing the lower crank-shaft, upper sprocket-shaft, clutches, &c. Fig. 4L is a detail perspective view of one of the upper sprockets, showing the clutchface thereof and the annular groove therein.

Similar numerals of reference indicate corresponding parts in the several figures of the drawings.

Referring to the drawings, 1 1 designate a pair of parallel sills or timbers forming part of the base-frame of the improved portable sawmill. These sills are located a sufficient distance apart to receive between them the saw-operating mechanism, said distance being about equal to the diameter of the boiler of the traction-engine. (Indicated at 2.) In advance of the front end of the boiler 2 the sills 1 are connected by transverse timbers 8 located at suitable points and spaced apart sufficiently to receive a pair of longitudinallyextending timbers 4 located a sufficient distance inside of the main timbers 1 to allow room for the revolution of a pair of cranks on the opposite ends of the crank shaft, through which vibratory motion is imparted to the reciprocating saw-frame.

The frame y thus far described is supported upon the l' boiler of the traction-engine by means of a pair of metallic straps. or stirrups 5 and 6, one passing over the boiler at its advanced end and being secured at its lower-ends to the main longitudinal sills l, and the other pass- `secured to the longitudinal sills 1, and these posts or standards are connected at their upper ends by longitudinallyextending tim- Suitable tap-screws '7 arebers 9,which are in turn connected by transversely-arranged timbers 10. In addition to the various timbers mentioned, vertical and transverse tie-bolts 11 are provided for securely holding the several timbers firmly together, and in this manner a very strong up-A right frame is providechwhich is well adapted to receive the operative parts of the mill hereinafter described. In order to still more effectively support the front end of the machine-frame, an oblique or inclined supporting rod or brace 12 is passed around the base of the smoke-stack or other convenient p ro- IOO verse timber 3 of the base-frame by passing said ends through perforations in said transverse timber and bending or clinehing the extremities thereof substantially in the manner A shown. Y

At or near the forward ends of the upper longitudinal timbers 9 is hinged a pendent vibratory saw-frame comprising a pair of arms or hangers 13, each of which is provided at its upper end with bearing-plates 14 secured to opposite sides thereof and extending upward and embracing the forward end of its respective supporting-timber 9, said plates being journaled upon opposite ends of a short shaft or pin 15, extending laterally from either side of said timber 9. The pendent hanger-arms 13 are furnished with bearingsy 16 at their lower ends, in which is journaled a transverse shaft 17, upon one end of which is mounted a circular saw 18, the opposite end of said shaft having a ily-wheel 19 and a pulley 2O keyed thereto. Interiuediate the ends of said hanger-arms suitable bearings 21 are provided for the reception of a transverse shaft 22, upon one end of which is mounted a pulley 23, located above and in the same plane with the pulley20 on the sawshaft, said pulley 23 being an idle one and preferably mounted loosely upon the end of the shaft 22.

24 represents a transverse crank shaft mounted in suitable bearings 25, attached preferably to the upper faces of the intermediate longitudinal timbers 4, and provided at opposite ends with cranks 26, from which a pair of pitmen or connecting-rods 27 extend forwardly to and are pivo tally connected with the vibratory saw-frame at or near the lower ends of the hanger-arms thereof, as

shown. Apair of sprocket- wheels 28 and 29, of different sizes, are iixedly mounted upon said crank-shaft intermediate its bearings on the timbers 4, and from said sprockets suitable sprocket -chains 30 extend upwardly over and around other sprockets 31 and 32, loosely mounted upon a transverse shaft 33 located above said crank-shaft and mounted in bearings secured to the upper longitudinal timbers 9. The upper sprockets are provided with inwardly-extendin g hubs 34,which are provided on their inner adjacent faces with inclined teeth 35, which are adapted to engage corresponding teeth upon the opposite edges of the hub of a large sprocket-Wheel 35a keyed to said transverse shaft 33. The

y hubs of the upper sprockets 3l and 32 are also formed each with an annular groove 36, and said grooves are adapted to receive the forked ends of a bifurcated shipping-lever 37 which is pivoted intermediate its ends to the forward transverse timber 10, as shown, or other convenient point. The shipping-lever 37 extends forward to the front end of the machine-frame in convenient position to be manipulated by the operator, and said lever is further curved at the proper point to escape and clear the sprocket-chain 38 which extends from the large sprocket-wheel 35 to and passes around a smaller sprocket 39 on a transverse shaft 40 mounted in suitable bearings on the longitudinal timbers 9, said shaft being provided at one end with a fixed pulley 41 arranged above and in line with the idler pulley23 and the pulley 2O on the saw-shaft. The shipping-lever 37 is provided with a tooth or projection 42 preferably upon its lower face, which is adapted to engage any one of a series of notches or teeth 43 in a transverse rack-bar 44, extending across and secured to the forward pairof vertically-extending posts or standards 8.

By means of the construction just described, when the shipping-lever 37 is thrown in one direction the clutch-faced upper sprocket 31 will be thrown into engagement with the large sprocket-wheel 35a, whereupon motion will be transmitted to the lower corresponding sprocket 28 on the crank-shaft, thereby imparting motion to the vibratory saw-frame through the medium of the interposed connecting-rods or pitmen above described. Vhen the shipping-lever is moved in the opposite direction, the upper clutch-faced sprocket 32 will be engaged by the large sprocket-wheel 35 and motion imparted to the corresponding lower sprocket 29 on the crank-shaft, and thence to the saw-frame in the manner just described.

Motion is imparted to the sawshaft by means of a suitable belt 45 which receives its motion from a band-pulley 46 mounted on the driving-shaft 47 of the traction-en gine. After leaving said pulley 46 the belt passes over the pulley 41, thence downward around and under the pulley 20 on the saw-shaft, thence upward and over the idler-pulley 23 and back to the main driving-pulley 46. By reason of this arrangement of pulleys, it will be observed that the saw-frame is left free to swing without increasing or decreasing` the tension of the driving-belt.

One of the sills 1 is extended suficiently to receive a suitable roller 48 mounted in bearings in the upper face of the advance end thereof adjacent to the circular saw for facilitating the sliding of the Wood across the path of said saw in position to be operated upon. A saw-guard 49 consisting of a longitudinally-extending strip is secured to the sill 1 outside of the saw for preventing the operator from accidentally coming into contact with said saw. A curved and slotted plate 50 is secured to the frame of the machine and arranged in such manner as to serve as a stop or support for the wood and to protect the saw from injury. Upon the forward movement of the saw the toothed periphery thereof passes through the slot in said arm or stop 50, thereby enabling the saw to cut entirely IOO IIO

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through the wood in a manner that will be readily understood.

In operation, motion is imparted through the belt 45 to the pulley 41 and thence to the shaft 40, and at the same time the saw-shaft is driven by said belt. Motion is communicated from the sprocket 39 to the large sprocket 35a by means of the chain 38. By the aid of the shipping-lever 37 either one or the other of the upper sprockets 3l or 32 may be thrown into engagement with the large sprocketwheel a and be driven thereby for communicating motion through their sprocket-chains to either one or the other of the lower sprockets 28 or 29, which, as before described, are of different sizes. By means of this construction the saw-frame may be Vibrated at any desired speed. If desired at any time, the shipping-lever 37 may be adjusted to a central position when neither of the upper sprockets 3l nor 32 will be in engagement with the large sprocket 35a, and .the saw-frame-operating mechanism will thereby be thrown out of gear.

It will be understood that the frame of the machine may be made of wood, steel or iron, or any preferred or desired material, and also that various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention. Y

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

1. The vibratory saw frame hinged to the main frame, a crank shaft arranged in parallel relation to the saw shaft, and one or more connecting rods interposed between said shafts, in combination with sprocket wheels of differscribed.

upon a shaft arranged in parallel relation to v said crank shaft, a driven sprocket wheel mounted upon the same shaft with said last named sprocket wheels,and interposed between the same, and means for throwing one or the other of said sprocket wheels into engagement with the driven sprocketwheel, substantially as and for the purpose de- 2. The combination with the machine frame, of a pendent vibratory saw frame, the saw shaft mounted therein, a crank shaft arranged in parallel relation thereto, one or more connecting rods interposed between the saw shaft and the crank shaft, sprocket wheels of different size keyed to said crank shaft, chains extending from said sprocket wheels to and around a pair of sprocket wheels mounted loosely and laterally adjustable upon a shaft arranged parallel to said crank shaft, a large sprocket wheel mounted on said shaft and interposed between said loose sprocket wheels, a shipping lever connected with said loose sprockets and adapted to throw one or the other into engagement with said large sprocket, and means substantially as described for driving said large sprocket wheel, all of said parts being arranged and adapted to co-operate in the manner specified.

In testimony that we claim the foregoing as our own we have hereto affixed our signatures in the presence of two witnesses.

FREDRICK E. SHORE. EDWARD L. SHORE. Witnesses:

ROBERT C. JoNEs, GEORGE W. SLUTZ.

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