US1126649A - Hand-reamer. - Google Patents

Description

E. G. MUSSER & T. DILGER.

HAND REAMER.

APPLICATION FILED JUNE 22, 1914.

Withesses Patented Jan. 26, 1915.

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ERNEST C. MUSSER AND THEODORE DILGER, OF BLUEFIELD, WEST VIRGINIA.

HAND-REAMER.

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Application filed June 22, 1914.

1/ h (M 20710112. it may concern Be it known that we, ERNEST C. Mnssnn and THEODORE DILGER, citizens of the United States, residing at Bluefield, in the county of Mercer, State of West Virginia, have invented a new and useful Hand- Reamer, of which the following is a specification.

This invention relates to a hand reamer and more particularly to one which is especially adapted to ream watch bezels.

The invention aims to provide a reamer which is rotated by hand and may be easily and quickly adjusted to thus ream a Watch bezel to the desired size for the reception of a crystal.

A further object is to provide a hand reamer with cutters which may be adjusted during the manual rotation of the reamer.

TNith the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the drawings accompanying this specification and forming a part thereof, the preferred embodiment of our invention has been illustrated, in which Figure 1 is a view in elevation of our improved hand reamer, illustrating the same in the act of reaming a watch bezel, the latter being fragmentally depicted. Fig. 2 is a view in longitudinal section of the reamer. Fig. 3 is a bottom plan view thereof. Fig. 4% is a cross sectional view taken on the line 4-4 of Fig. 2. Fig. 5 is a detail view in perspective of one of the movable cutters.

Referring to the drawings in which similar reference numerals designate corresponding parts throughout the several views, the handle 7 is enlarged at its lower extremity to form the head 8.

A central bore 9 extends for a limited distance within the head and communicating with which are the three symmetrically arranged and radially extending slots 10.

The slots 10 are adapted to receive the cutters 11 therein and the bore 9 is adapted to receive the expanding member 15 therein. The bore 9 extends a slight distance between Specification of Letters Patent.

Patented Jan. 26, 1915.

Serial No. 846,675.

the lower level of the slots 10 and communirates with the threaded bore 18 which extends entirely through the handle or shank 7. The expanding member includes a conical lower portion 14 and an upper cylindrical portion 15, the latter being of such size as to slide within and be guided by the side walls of the bore 9.

A thumb screw 16 threadedly engagesthe bore 13 and is provided with the lower restricted portion 17 which contacts with the expanding member and is adapted to move the same in a forced manner. The upper extremity of the thumb screw is provided with the knurled head 18 by means of which the cutters may be adjusted during the manual rotation of the reamer. The three cutters are exactly similar, for which reason, only one will be treated in detail, which as illustrated in Fig. 5, comprises the body portion 19 and the lower and more restricted portion 20. The difference in size between the portions 19 and 20 defines two shoulders or ledges 21 by means of which the cutters are held within the slots 10.

Three segmental plates 23 are rigidly se cured to the cutter head by the screws 24 or allied means and which plates are spaced a distance apart so as to define three slots 25 which lie directly above but are more limited in width than the slots 10. The slots 25 are of such size as to slidably receive the portion 20 of the cutters therein but too restricted to allow the portion 19 of the cutters to pass therethrough. This provides that when the cutters are mounted within the slots and the plates 23 secured to the cutter head, the cutters may move freely longitudinally in the slots but are prevented from moving transversely thereof. The cutters are each provided with the cutting blades 26 rigidly secured thereto, which cutting blades include the serrated or cutting edges 27 The adjacent central portions of the segmental plates 23 are rounded as at 28, which allows portions of the helical expanding member to pass therethrough but prevents the same from becoming entirely detached from the head. Each of the cutters is provided with the groove 29 extending along the upper surface, which groove is adapted to receive the compression spring 30 therein, which spring contacts with the rear wall 31 of the groove.

A band or ring 32 extends around the head 8 and fits within the annular groove or ledge 33 so that the outer surfaces of the ring and head will lie substantially in the same plane to thus define a continuous and unbroken surface. The ring 32 includes three upstanding ears 3a which extend in front of the slot as illustrated in Fig. 2 and receive the compression spring thereagainst. This confines the compression spring Within the groove 29 and a similar groove 35 which is formed along the bottom Wall of the slots 10. The inner edge of each cutter provided with the beveled face 22 which receives the conical surface of the expanding member thereagainst and provides for the forced adjustment of the cutters. lhe surface 36 of the handle or shank 7 is serrated or knurled so as to provide a suitable grip, by means of which the reamer may be manually rotated. The head ofthe thumb screw extends upwardly Within the palm of the hand and this provides for either the expansion or retraction of the various cutters, while the rcamer is being rotated. The reamer thus formed is particularly adapted for reaming Watch bezels. It

s has been found in practice that the Watch crystals vary in size,necessitating the reaming of the Watch bezels. This can be quickly and conveniently accomplished With the reamer' as herein described.

Having thus fully described our invention,

' What We claim is A manually operable reamer for Watch bezcls comprising a head, a handle proecting therefrom, a bore extending through 35 head and handle and enlarged for a limited distance Within said head, an expanding member positioned in the enlarged portion of said bore, segmental plates secured to the said head and positioned a dis- 40 tance apart, defining slots, said head provided with slots registering with and slightly larger than the slots defined by said plates, cutters slidably mounted Within and limited to rectilinear motion by said slots, said head and cutters provided with registering grooves, springs positioned Within said grooves adapted to retract said cutters, and a ring frictionally engaging the head and provided with downwardly extending cars Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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