US858752A - Reamer. - Google Patents

Description

PATENTED JULY-2, 1907.

c. w. H. POTTER.

BEAMER. APPLIoATIoNrILBD Armas. 1904. nnnnwnn Homan, 190s.

-UNlrrED sTArEsf PATENT oEEroE.

i CHARLES W.. H. POTTER, Olli-DETROIT, MICHIGAN, ASSIGNOR TO MINNIE L. POTTER AND WILLIAM AIKMAN, JRI., OF DETROIT, MICHIGAN.

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Ne. 858,752. f

Specieation of Letters Patent. y

Patented July 2, 1907.

applleeuen sled Aem 25.1904. nenewea November so, 190e;v serlel Ne. 345.767.

T o all whom 'it may, comme: Be it known th`at I, ,CHARLES W. H. POTTER, a citizen of the United States of America, residing at De- 'reference being had therein the accompanying drawings. l p

This invention relates to improvements in reamers for forming undercut openings or sockets, and is especially adapted for forming sockets in marble an'd other or other securing devices thereto, and its object is to provideadevice for the purpose which is cheap to` manufacture, efiicient in its operation, and so `constructed that the opening may be reamed at any depth, the device being of uniform diameter throughout its length with noprojecting parts to interfere with its .being inserted to any desired depth in an opening.

It is also an object of the invention to provide 'springs for holding the cutters retracted when not in use so that they will not interfere with its ready insertion in an opening and'to provide certain 4other new and useful features, all as hereinafter more fully described and shown inthe accompanying drawings, in which.-

Figure l, isa side elevation of a device embodying the invention; Fig. 2, an end elevation of the lower end of the saine; Fig. 3, a longitudinal section; and Fig. 4, a section on the line :2J-Kx of Fig. 3.

As shown in the drawing, 1, is the body which is bored longitudinally inward from one end to form a socket 2 therein and the opposite or lower end ofthe same is formed with radial slots 3 extending longi-v tudinally and meeting the socket. x Within these slots are pivotally secured thevcutters 4 by pins 5 passingvthrough openings in the upper ends of the cutters and holes bored in the body at the upper o'r inner ends of said slots, said 4.cutters being provided with cutting edges 6 along their outer edges to engage the side wall of an opening or bored hole and ream out or undercut the same as the cutters are swung outward on their pivots.

To drive orrotate the body and, at the same time `force the cutters outward, a stem 7, provided with a" squared shank or head 8 to engage the socket of any ordinary bit stock or similar device and fitting within the upper end of the socket 2, is provided to=moveY longitudinally therein, the same being prevented from Iturning in the socket by a pin 9 on the stemengaging a longitudinally extending slot 10 in the body; and a longitudinally extending rod or reduced portion 11 of the stem projecting from the innerrend of the same, is`

provided with a tapering end or point forming a wedge 12-to engage the inner edges of the cutters when the stem is forced inward and turn the cutters on their piva short distance past the pivots of the cutters to allow the wedge to engage the cutters'at a short distance be,- low their pivots and theieore less force will be reaxial opening of a diameter to t the rod 11 and guide the same. A coiled spring 16 is interposed between said washer and the shoulder formed by'the junction of the stem and rod to hold the stem projected from the socket and the wedge lifted out of contact with the cutters. .If the washer is'found unnecessary and is not used, the springmay directly engage the shoulder.

-Flat springs 17 are secured at one end to the cutters, and extending upward within the bore 13, engage the rod 11 and exert a force to hold the cutters retracted or within the slots so that they will not swing outward entering.

Having thus fully described ray-invention, what I claim isz- 1. In a reamer, the combinationoi a body of uniform diameter throughout its length and having a longitudinal bore extending inward from its upper end forming a socket, a cutter carried by said body near its lower end and normally lying`within the same, a stem longitudinally movable in said socket to move the cutter and extending out through its open end, a squared head'on the louter end of said stem, a spring sleeved on the stem vto normally hold the same projected from the body, and meaxlsconnecting the stem and body to cause the same tobe turned together.

2. In areamer, the combination of a body having lonlng inward from the opposite end to said slits, cutters pivotaily secured in said slits, Va stem iitting within the outer open end of the body and provided with a squared head, a lreduced end on the stem to engage the cutters, a spring sleeved on the reduced portion of the stem within thebore to hold the stem projected from the body and means connecting the stem and body and limiting the movement of the stem. e y

3. 'In a 'reamei', the combination of a body formed with longitudinal' slits st one end and a bore extending inwardfrom its opposite end and reduced near the slots to forman internal shoulder, cutters plvotally secured in said slots, a stem lilttillg within the outer end of said bore and provided withl a squared head outside the body, a reduced portion extending inward from the inner end of the stom to`engagc and' operate the cutters, a. washer engaging the internal shoulder in the bore and provided with an opening within which the reduced portionfits, a

end of the stem at one end andthe washer at the oppo ots. The inner end 13 of the bore or socket 2 extends washer 15 may be seated upon said shoulder having an gitudinai slits. at one end and a longitudinal bor'e extend-.-

when inserting the tool inlan opening and prevent `its loo A spring sleeved on the reduced portion `alldengaging the site end, and means connecting the stem and body to f'traeted and means `connecting the stem und body whereby limit the longitudinal movement of the stein and cause the body to turn therewith. l

i4. In a reamer, the combination of a body having 1ongitudinal slits at one end and a longitudinal bore extending inward from the opposite end to said slits, cutters pivotally secured in said slits, a stem tting within the outer open end of the body and provided with a ,squared head, a reduced end on the stem t0 engage the cutters, springs -for normally holding the cutters rethey refreeto have u limited sliding movement in relution to each other.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES W. H. POTTER.

Witnesses:

THOMAS G. LoNGsTAFir, LEWIS E. FLANDERS.

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