US406274A - Sawing-machine - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1 J. FENSOM.

SAWING MAGHINE.

No. 406.274. Patented July 2, 1889.

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(No Model.) 2 Sheets-Sheet 2.

J. PENSOM.

SAWING MACHINE.

No. 406,274. Patented July 2. 1889.

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UNITED STATES PATENT OFFICE.

JAMES FENSQM, OF ALPENA, MICHIGAN;

SAWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 406,274, dated July 2, 1889.

Application filed February 13. 1889.

To all whom it may concern:

Be it known that 1, JAMES FENSOM, a citinen of the United States, residing at Alpena, 1n the county of Alpena and State of Michigan, have invented certain new and useful Improvements in Sawing-Machines, of which the following is a full and clear description, reference being had to. the accompanying drawings, forming part of this specification, in which 7 Figure 1 is a side elevation of a sawing-machine embodying 'my invention. Fig. 2 is a plan view of the same. Fig. 3 is a longitudinal sectional view on the line a: a of Fig. 2. Fig. 4 is a transverse sectional view on the line y y of Fig. 2. Figs. 5 and 6 are details,.to be referred to.

My invention relates to certain new and useful improvements in sawing-machines-for use in connectionwith pulp-mills or other purposes where a number of blocks are to be sawed'such as paving or match blockswhen the blocks are to be sawed into exact lengths; and my invention consists in the constructions and combinations of devices, which I shall hereinafter fully describe and claim To enable others skilled in the art to make and use my invention, I will now describe its construction and indicate the mannerin which I carry the same out.

In the accompanying drawings, A repre-- sents any suitable form of main frame, in which the operative parts of my machine are mounted, and A is the arbor, carrying any desired number of saws, preferably fifteen, the said arbor also being provided with bandpulleys a a. A stationary table D, secured in the main frame, has pivotally connected to its forward end at 2 a lifting-table O, which, being free at its opposite end, may be raised, as shown by dotted lines in Fig. 1, to permit the removal or adjustment of the saws.

The upper surfaces of the tables 0 and D are formed with parallel grooves E, (shown more particularly in Fig. 4,) and in said grooves the reciprocating arms 0 are designed to operate, these arms being secured to or formed with the reciprocating carriage J, which moves in guides K, and is operated in a manner I will hereinafter indicate. The arms 0 have upwardly-projecting portions, S, united Serial No. 299,703. (No model.)

together at their tops by a plate or rod S, and said projecting portions are slotted vertically to receive and guide the movements of the steel dogs F, whose under surfaces are formed or provided with spikes or teeth I), which catch into the wooden block and hold it up against the saws, when the dogs are moved forward by the mechanism I will hereinafter fully describe.

The dogs F are riveted or otherwise rigidly secured to the forward ends of the levers F, which are fulcrumed upon a rod 0, whose ends are in turn mounted in suitable arms R, projecting upwardly a suitable distance from the carriage to which they are secured.

The short arms ofthe levers extend rearwardly of the rod 0, and their outer ends are perforated for the reception of a rod cl, upon the ends of which is hung a frame P, (shown in Figs. 2 and 3,) the said ends of the rod 19 carrying also suitable weights G, whereby, when the dog-block I, hereinafter mentioned, is caused to recede from its engagement with the frame P, the weights overcome the weight of the forward portions of the levers, and by causing the short arms of the whole series of levers to drop thereby elevate the forward portions of said levers and release the dogs F from engagement with the block.

The dog-block I is centrally located in the carriage below the frame P, and it has an inclined shelf or top, which, passing under the frameon the forward movement of the dogblock, overcomes the power of the weights G and raises the frame P and short arms of the levers, so that their forward portions may be lowered to the position shown in full lines in Fig. 1, it being understood that the upward movement of said arms is limited by the slots in the forward portions S of the arms 0,

The dog-block I is secured to a rearwardlyprojecting bar Iflwhich carries or is formed with a feed-rack I, which slides in suitable guides in the center of the carriage, the movement of this feed-rack being independent of that of the carriage, so that when the dogblock I and carriage J are in their normal positions back of the saws the dog-block may be fed forward by the rack and its pinion g until it comes into contact with the frame P, when the latter is raised to throw the dogs F onto the block. WVhen in this position and the dog-block held by the frame P, the pressure is brought onto the carriage, which is moved forward until the operating-pinion is tripped at the end of the stroke and the carriage moved back into its normal position by a weight attached to the end of a rope, which is fastened to the carriage and passes over a guidessheave J as shown in Fig. 1.

The pinion g is secured on the end of a transverse shaft f, to which is keyed a clutch Z and collar 01, as shown in Fig. 6, a spring m being coiled around the shaft, with its free ends secured in the face at the pinion and collar, respectively, whereby when the carriage has reached the end of its stroke and the pinion g tripped, as I will hereinafter disclose, the said spring operates to turn the pinion backward one-half turn, so that in being thrown again into engagement with the feedrack the clutch has to make a one-half turn before it operates on the pinion g, thus leavin g the feed-rack stationary for an instant, so as to give time to place the block to be cut in position on the table. This construction not only makes it more easy to handle the block, but also relieves the pinion of much of its strain.

The means for tripping the pinion g, I will now describe. Between lugs t' on a timber A of the main frame is fulcrumed an arm h, the one end of which has a bearing for the end of the shaft f, and the opposite end is formed with a socket 5, in which a curved head 6 on the lower end of a rocking arm k is seated, the upper end of said arm being arranged in the path of a lug or projection L, extending downwardly from the carriage, so that when the carriage completes its stroke the projection L strikes the upper end of the arm and throws the pinion out of gear with its rack. The arm is connected with a rocking arm 0', which has its bearing in a chair T, secured on the basetimbers of the main frame, as shown in Figs. 3 and 5. When the pinionis thus tripped, a spring U, secured to the dog-block, pulls the latter back, thereby releasing the lifting levers. During this movement the weight attached to the earriage also moves it backward. As the carriage moves back the projection L strikes the arm from the opposite side and throws the pinion again into gear with its rack. The return of the carriage is received by a cushion or buffer M, as shown in Fig. 2.

The means for driving the machine is substantially as follows: The pulley a on the arbor by the medium of a band drives the band-pulley E, mounted on a shaft E" and carrying the friction-pinion 7, which is thrown into and out of engagement with a frictionwheel 8 on the shaft 9 by means of sliding journal-box N and operating-lever H, which may operate in any well-known manner. The shaft on which is the friction-wheel 8 carries a pinion 10, which meshes with and drives a gear-wheel 11 on the shaft f, which carries the pinion g, before described, and on said shaft is the arm 7L.

The power to operate the saws may be derived from any suitable source, and is communicated to the main pulley on the arbor, as shown in Fig. 2.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, isl l. The combination, with the main frame, the arbor mounted therein, and the saws upon the arbor, of the carriage moving in guides upon the main frame, the movable dog-block, the levers carried by the carriage and operated by the dog-block, and the dog on the levers, substantially as herein described.

2. The main frame, the arbor, and the saws thereon, in combination with the fixed table- D, the table 0, hinged to the fixed table, the reciprocating carriage, and the arms 0, carried thereby, said tables 0 and D having their upper surfaces grooved for the reception of the arms, substantially as herein described.

3. The main frame, the arbor, and the saws thereon, in combination with the fixed grooved table D and the hinged grooved table 0, the reciprocating carriage, the arms 0, carried thereby and moving in the grooved table, and provided with the upwardly-extendin g slotted portions S, and the levers carried by the car riage and provided with dogs F, which are guided in the slotted port-ions S of the arms 0, substantially as herein described.

4. The main frame, the arbor, the saws thereon, and the reciprocating carriage, in combination with the hinged and fixed tables 0 and D, having grooves extending between the saws, the arms 0, carried by the carriage, having upwardly-extending forward portions S, provided with slots, and the levers mounted on the carriage and provided with dogs F, operating in the slotted portions S, substantially as described.

5. The main frame, the arbor, the saws thereon, and the tables having grooved surfaces, in' combination with the carriage having the upwardly-extending arms R, and the arms 0, having slotted portions S, the levers mounted in the arms R and having their front portions provided with dogs F, working in the slotted portions S, and a movable dogblock operating against the short arms of the levers, substantially as herein described.

6. The main frame, the arbor, the saws thereon, and the carriage J, in combination with the table, the dog-block, the operating rack and pinion, the pivoted levers carrying the dogs and the frame P, said frame being engaged by the movements of the dog-block to operate the levers, substantially as herein described.

7. The main frame, the tables, the arbor, the saws, the reciprocating carriage, and the levers pivoted thereon and having their rear ends mounted on a rod, the dogs on the le vers, and the frame P, in combination with dog-block, the bar 1 the operating rack and pinion, the counter-Weight for returning the carriage, and 'the spring for returning the dog-block, substantially as described;

8. The main frame, the tables, the arbor, the saws, the carriage, the dog-block, and the operating rack and pinion, in combination with the levers having the dogs F, a rod passing through the rear ends of said levers, weights upon said rod, and the frame P, engaged by the clog-block on its forward movement to lower the forward ends of the levers, said levers being elevated on the return of the dog-block by the weights on the rod, substantially as herein described.

9. The main frame, the table, the arbor, the saws thereon, the 01 rriage, the levers having the dogs F and dog-block, and the operating rack and pinion, in combination with a mechanism for tripping the pinion at the end of the forward stroke, said mechanism comprising a projection carried by the carriage, a pivoted arm carrying the pinion, and a rocking lever having a trip engaged bythe projection, substantially as described.

10. The main frame, the arbor, the saws, the carriage, the levers having the dogs F, the operating dog-block, and the rack and pinion, in combination with the power mechanism, the shaft f, on which the pinion is mounted, the clutch and return-spring on said shaft, the arm h, the rocking arm k, having a trip T, and the rocking arm mounted on the base of the main frame and connected with the rocking arm 7r, substantially as described. I

' JAMES FENSOM. Witnesses:

JNo. W. SMITH, A. B. J ONES.

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