US1154605A - Valve-grinding device. - Google Patents

Description

hs. A. oswlcs. VALVE GRINDING DEVCE.

APPLICATION FILD iUNE 5. l1915.

Patented. 'Sept'.v 28, 1915.

ijf/g. 2.

tintas sfrafrns are SEYMOUR A. BOSTWICK. OF BOSTON, rMASSACHUSETTSy ASSIGNOR OF ONE-THIRD TO CLARENCE A. lGLENTVJORTH AND ONE-THIRDTO HAROLD BOSTON, MASSACHUSETTS.

M. BATER, BOTH OF VALVE-GBINDING DEV'ICE.

Specification of Letters Patent.

Application filed June 5, 1915. Serial No. 32,445.

T01/H llm/l/ 1'15 nit/ l/ crm/5cm.' lie it known that I, SEYMOUR A. Bos'rivicn, a citizen of the United States, resids ing at Boston, in 'the county of Suffolk and State of Massachusetts, have invented new and useful Improvements in Valve-Grinding Devices, of' which the following is a specification.'

lhis invention relates to improvements in valvel grinding devices and has for its object to provide a strong, durable and easily operated device which may be taken apart,

when not inuse, to occupy very little space.

The invention consists in the combination and arrangement of parts whereby the above object and certain other objects hereinafter appearing may be attained, as set forth in the following specification and particularly pointed out in the claims.

Referring to the drawings: Figure 1 isa vertical section partly in elevation of-a device embodying my invention. Fig. 2 is a plan view partly in section of the same.

Like numerals refer to'like parts throughout the several views ofthedrawings. v

ln the drawings, 5 is the stock and 6 the tool'holder of the device which isrnounted to rotate relatively to said stock. Thestock 5 is preferably made of metal with a cylindrical chamber formed therein and adapted to receive a cylindrical stem 8 which constitutes a part of the tool holder 6. An annular groove S) is formed in the stem S and receives the end of a screw 10 having screwthreaded engagement with the stock 5, -which screw retains said stem within the chamber 7 and permits the same to be rotated therein.

l, rlhe lowerend of the tool holdei' f3 is ref eessed at 11 to-contain one end of a tool 12 which tool is secured in said recess preferably by means of a screw 13. The outer end of-the tool 12 may be formed in numerous ways according to the character and nature of the work to be performed. An annular shoulder 14 is formed upon the tool holder 6 and engages a corresponding shoulder 15 formed upon the stock 5, said shoulders 11 and 15 being formed and arranged to receive the thrust due to the pressure which is applied to the tool during the operation thereof. i a

A grip'16 1s arranged 'adjacent theupper end of the stock 5 in order to facilitate the tion may .be imparted to said tool holder.

from said slide. The preferred method of carrying out this feature of the invention is to provide a pair of rods 18 and 19 which are. arranged parallel to each other upon opposite sides of the axis of said tool holder.

- The rod 18 is eonn'eetedat one end to the adjacent end of the rod 19 preferably by a cross bar 20, said rodsybeing preferablyV riveted to said cross bar. A` T-shaped handle 21 is preferably rotatably scoured to 'tween the bars 18 and 19 permitting Said handle to be rotated to a position best suited to the operator of the device.

One of the parallel rods, preferably the rod 18, is 'provided with a series of teeth 22 lengthwise thereof and upon the side adja-4 cent the other rod. Said rods are further' more arranged to slide in guides 23 and 24 Patented sept. es, 1915. 7

1 the cross bar 20 substantially midway bei' respectively'formed in an enlarged portion 25 of the stock 5.

The tool holder 6 is alsoprovided with an' 'enlargement 26 about the periphery of which are formed gear teeth 27, which teeth areadapted to mesh with the teeth 22 ofthe rod 18. Said rod constitutes a rack. The enlargement 26 and the gear teeth 27 constitute a. gear which is arranged with the enlargement-.25 of said stock,said enlargement being substantially cylindrical in shape and hollow to inclose said gear.

As liereinbefore.stated,the rods 18 and 19 are arranged upon opposite sides of the axis of the tool holder 6 and. in order lthat said rods may be 'placed as near-together as possible and yet constitute suitable guides to control the movements of said slide transversely of said tool holder and to prevent cramping thereof 'said rods are placed in different transverse planes, which are arranged substantially parallel with each otherv and at in order to clear said rod 19, permitting said right angles tothe median axial line of said tool holder.

The rod 18 is, as hereinbefore stated, arranged in a position so that its teeth 22 will mesh with the teeth 27 of said gear, while the rod 19 is arranged above said rod 18 and the upper face of said gear is cut away at 28 rod to move freely through its guide 24 Without interfering with the movements of said gear. 4

To operate the device the proper tool is inserted therein and the rods 18 and 19 of the slide 17 inserted in their respective guides 23 and 24, this being the only manner in which said rods maybe inserted owing to the absence of the teeth on the rod 19. The

grip 16 is held by the operator and the de-f sired pressure applied thereto. The handle 21 is then grasped by said operator and reciprocated the proper distance through the guides 23 and 24, thus transmittingan oscil.v

latory movement to the tool 12 through the tool holder 6.

It will be seen that the guides 23 and 24 fare quite long and entirely surround the and arranged to reciprocate transversely of said tool holder, and teeth formed upon one of said rods adapted to mesh with the teeth upon said holder.

2; A valve grinding device having, in combination, a stock, a tool holder rotatably mounted in said stock, teeth on said tool holder, a rack constructed and arranged to reciprocate in said stock transversely of said holder and at one side thereof, the teeth of said rack being adapted to mesh with the teeth of said holder, -a .guide-rod Varranged upon theopp'osit'e side of thev axis of said' tool.

holder from said rack, means for connecting one end of said rack with the adjacent end rod and said rack.

3. 4; valve grinding device having, 1n combination, a rotatable tool holder, a gear of said rod, and means to reciprocate said on, said tool holder adapted to rotate there-` with, a stock adapted to receive portions of said tool-holder, said stock having aV casing adapted to surround and inclose said gear, a

pair of rods slidablymounted in said casing transversely of said tool holder, teeth formed upon the inner face of one of said rods adapted .to mesh with the teeth of said gear, V

and means to reciprocate saidrods trans- -versely of said holder whereby an oscilla-l tory motion may be imparted to' saidI tool holder. A y

4. A valve grinding device having, in combination, a stock having a cylindrical chamber formed therein and open at one end, a. cylindrical casing formed integral with said stock adjacent the open end of .v

said cylindrical chamber, a grip secured adjacent to the closed end of said stock, atool holder having a cylindrical stem adapted to lit the cylindrical chamber in said stock, a gear on said tool holder adapted to rotate Within said cylindrical casing, said cylin- .s

drical stem having an annular recess formed therein, a screw in said stock adapted to project into said annular recess and retain said holder within said stock, a' rack constructed' andarranged to reciprocate transversely of said cylindrical casing, the teeth of said rack engaging the teeth of said gear, a rod constructedand arranged to reciprocate in said cylindrical casing in parallel relation to said rack, and means operatively connecting said rod to saidrack adapted to simultaneously reciprocate said. rod andsaid rack transversely of said tool holder.

In testimony whereof I have hereunto `set my hand 1n presence ot two subscribing Witnesses.

SEYMOUR A. BOSTWICK. Witnesses: CHARLES S. GooDING, SYDNEY E. TAFT.

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