US749072A - Chip-breaker for woo dwo rkl n g - m ac hin es - Google Patents

Description

UNITED STATES Patented ianuary 5, 1904.

PATENT OFFICE.

CALVIN D. MARSH, OF WILLIAMSPORT, PENNSYLVANIA, ASSIGNOR TO HERMANGE MACHINE COMPANY, OF WILLIAMSPORT, PENNSYLVANIA.

CHIP-BREAKER FOR WOODWORKlNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 749,072, dated January 5, 1904. Application filed August 29, 1903. er al No. 171,282. (No model.)

To aZZ whom it may concern:

Be it known that I, CALVIN D. MARSH, a citizen of the United States, residing at Williamsport, in the county of Lycoming and State of Pennsylvania, have invented a new and useful Chip-Breaker for Woodworking- Machines, of which the following is a specification.

The invention relates to improvements in chip-breakers for woodworking-machines. I

The object of the present invention is to improve the construction of thatclass of chipbreakers which are adapted to rest upon the board operated on by the machine and which yieldably engage the same, whereby the chipbreakers are prevented from being thrown upward out of engagement with a board by the rough uneven surfaces of the same.

A further'object of the invention is to provide a chip-breaker of this character having a cushioning-spring which will be practically housed within the chip-breaker and which will be adapted through its vibration to clean out any chips or shavings entering the socket range the socket or recess whichforms a pocket for the spring in a horizontal position to prevent it from becoming filled with dust, chips, and shavings.

With these and other objects in view the invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claim hereto appended, it being understood that various changes in the form, proportion, size, and minor details of construction within the scope of the claim may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings, Figure 1 is a side elevation of a chip-breaker constructed in accordance with this invention. Fig. 2 is a similar view, partly in section, of a portion of the chip breaker.

Like numerals of reference designate corresponding parts in all the figures of the drawlugs.

1 designates the upper cutter, and 2 the table over which the boards to be dressed or molded or otherwise operated on are passed.

3 designates the chip-breaker of the ordinary shape, hinged at 4 to the frame of the machine and shaped to catch the flying chips cut off by the cutter 1. The chip-breaker, which is located in advance of the cutter, as shown, is beveled or cut away at its bottom or lower end at 5 to form an enlarged bearingface, which is adapted to rest on the board being dressed or molded when the machine is in operation.

The weight of the chip-breaker tends to hold it in position; but this weight is supplemented by a lever 6, arranged horizontally and pivotally connected at its end 7 to the chip-breaker bya fastening device 8,as clearly shown in Fig. 2 of the drawings. The outer portion of the lever receives an adjustable weight 9, secured in its adjusted position by a clamping-screw 10 or other suitable means. The weight is adapted to be moved inward and outward to vary the pressure of the chipbreaker 0n the board, as will be readily understood.

In order to enable the chip-breaker to rest firmly at all times upon the material and ride over rough-sawed lumberor projections without being thrown upward by the same, a cushioning spring 11 is employed. The chipbreaker is provided between its top and bottom with an extension or enlargement disposed approximately horizon tally and consisting of a block or piece which is provided with upper and lower horizontal recesses or pockets 12 and 13. The upper recess or pocket receives the pivoted end of the lever 6, and the other or lower recess or pocket forms a socket for the coiled spring 11, which is disposed horizontally and which is interposed between the wall of the inner end of the pocket or recess 13 and a depending arm or projection 14 of the lever 6. The depending projection of the lever is located between the ends thereof adjacent to the pivot 8'ata point between the same and the weight, and the coiled spring, which is disposed horizontally, projects slightly from the pocket or socket and cushions the chip-breaker, permitting the same to yield and pass over rough surfaces of undressed material without throwing the weight upward, whereby a constant pressure is maintained on the material. The vibration of the horizontally disposed cushioningspring is adapted to clean out the pocket or socket in which the spring is arranged, and by arranging the pocket of the spring horizontally chips and shavings are excluded and there is no liability of the pocket becoming filled with dust and thereby interfering with the operation of the cushioning-spring.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

In a machineof the class described, the combination of a movably-mounted chip-breaker provided With upper and lower horizontal pockets open at one end, a weighted horizontal lever pivotally mounted at one end within the upper pocket and provided with a depending projection arranged at the open end of the lower pocket, and a coiled cushioningspring housed within the lower pocket and interposed between the inner end thereof and the said projection and resting upon the bottom of the lower pocket, whereby the expansion and contraction of the spring incident to the vibration of the lever and the chip-breaker will operate to clean the pocket automatically.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

CALVIN D. MARSH.

Witnesses:

HUGH GILMORE, ALBERT D. HERMANCE.

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