US397834A - Francis h - Google Patents

Description

(No Model.)

P.H.CRAPTSQ CHIP BREAKER.

Fig.2.

11 ml x 2 l" Witnesses.

04V Inventor.

. @y firm; 19

lJNiTE. stares PATENT rrrcn.

FRANCIS H. CRAFTS, OF BUFFALO, NElV YORK, ASSIGNOR TO E. & B. HOLMES,

OF SAME PLACE.

CHIP-BREAKER.-

SPECIFICATION forming part of Letters Patent No. 397,834, dated February 12, 1889. Application filed November 17, 1887. Serialllo. 255,385. (No model.)

To all whom it may concern:

Be it known that 1, FRANCIS H. CRAFTS, a citizen of theUnited States, residin gin Buffalo, in the county of Erie and State of New York,

haveinvented certainnew and useful Improvements in Chip-Breakers, of which the following is a specification.

My invention relates to certain improve ments in chip-breakers for surfacing and matching machines, and will be fully and clearly hereinafter described and claimed, reference being had to the accompanying drawings, in which Figure 1 represents aplan or top view show- I 5 ing a portion of a machine to which the chipbreaking devices are connected, showing also a top view of two chip-breakers and their curved holding-bars in their proper position for working, a portion of one of the curved 2o holding-bars being cut away, so as to show the whole of one of the curved chip-breakers. A piece of board to be operated on is also shown between them. Fig. 2 is a side elevation looking in the direction of the arrow e in Fig. 1. Fig. 3 represents a section in line ab,

Fig. 1.

Hereto'fore chip-breakers have been made of east-iron, the curved holding-bars and chipbreaking portion all being formed in one piece,

so that when the chip-breaking portion was worn the whole had to be thrown away and a new one sul'istituted.

The object of my invention is to avoid this objection by using an adjustable curved steel 3 5 chip-breaker capable of being adjusted when worn until nearly the whole may be used, so that the chip-breaker only when worn out is required to be replaced by a new one.

In said drawings, 1 represents a portion of the top of the machine to which the device is connected. Y

2 3 are the vertical shafts to which the rotary cutters are attached; but as my invention is designed to be applied to any of the well- 4 5 known surfacing and matching machines such as are in common use a further description here of such machine is not required.

at 5 represent the curved chip-breaker holders, which are made right and left, as shown,

and are secured to the top of the machine by the bolts 6, so as to swing horizontally thereon.

7 is a circular or curved vertically-projecting rib, forming the outside rib, and 8 is a shorter inner rib, the two leaving a curved groove into which the curved chip-breakers 9 are nicely fitted, so that they may easily move in said groove for adjustment, and then be rigidly secured by the set-screws 10 at any point to which they may be adjusted. These chip-breakers 9 are preferably made of caststeel hardened or tempered. The set-screws 10 pass through the top portion, 11, which may be either formed in one piece with the curved holding-bar or rigidly attached to it in any well-known way. 6 5

Chip-breakers are usually attached to a machine, as shown in Fig. 1, by bolts 6, so as to turn easily on them, and are drawn toward each other, so as to rest against the edges of the board 12, by means of a lug, 13, which pro- JBOtS down into an opening in the top of the machine to which it is attached. This opening is shown by dotted lines in Fig. 1 and designated by the number 14. To the lugs 13 is a cord, 15, which passes over a grooved friction-roller, 16, and having a weight, 17. (Shown in dotted lines in Figs. 2 and 3.)

In operating with this device the board 12, moving in the direction of the arrow f and in opposition to the movement of the cutters, So (which move in the direction of the arrow g,) wears away the point of the chip-breaker, and when sufficiently worn it may easily be adjusted forward and secured as often as may be required until nearly all used up; or, when necessary, it may be taken out and reground and then inserted and adjusted.

I claim as my invention- 1. In a chip-breaker, the combination of a pivoted curved holding-bar provided with a 0 curved groove, a curved adjust-able chipbreaker adapted to fitin and be moved around in said groove to adj ust it as it wears away, and bolts for securing it at any pointwhen so adjusted, substantially as and for the purposes described.

2. In a chip-breaker, the combination of a pivoted curved holding-bar having a curved.

groove, a curved adjustable chip-breaker roller and secured 10 a 111g, 13, substantially adapted to fit in and be moved around in as described. said groove to adjust it as it Wears away, 1

bolts for securing it at any point when so {Ldjustod, and a 1110:1119: for holding it up to its I \Vitnossos: work, COl'lSiStillg 0f :1 weight connected with FRANK A. FOX,

a cord passing up and oval-a grooved friction- JAMES SANGSTER.

FRANUIS II. RA l lS.

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