US918049A

US918049A - Machine for reseating valves.

Info

Publication number: US918049A
Application number: US36463907A
Authority: US
Inventors: Robert H Hazeltine
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-03-26
Filing date: 1907-03-26
Publication date: 1909-04-13
Anticipated expiration: 1926-04-13

Description

R. H. HAZELTINE. MACHINE P0P. RESEATING VALVES.

APPLICATION FILED MAR. 26, 1907.

Patented Apr. 13,

Illrlr E 5 .Illu-.- .nnllli... r IIII ROBERT H. HAZELTINE, OF ITHACA, NEW YORK.

MACHINE FOR RESEATING- VALVES.

Specification of Lettere aatent.

raient-ed apra ie, ieee.

Application :tiled March 26, 1907. Serial No. 364,639.

- To all whom it may concern:

Be it known that I, ROBERT H. HAZELTINE, of Ithaca, in the county of Tompkins, in the State of New York, have invented'new and useful Improvements in Machines for Re.- lseating Valves, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to certain improvements in machines for reseating valves and refers more particularly to mechanism for rotating the valve through limited arcs in reverse directions upon its seat using an in# terposed polishing or grinding element such as flour 'of emery and oil, pumice stone or other polishing paste or tine abrasive for simultaneously grinding the valve and its seat into exactconforrnity with each other without liability of cutting or channeling :uch valve or seat. 1

My object is to provide simple practical and etlicient mechanism adapted to be operated by haudand by which the 'valve may be rotated through limitedv arcs, in opposite diret-tions and intermittingly and automatic- .ally moved into and out of contact with its seat at regular predetermined intervals.

One of the more specic objects is to provide a.v simple means for holding the valve during its partial rotation and intermittent elevation and depression.

Another speciic object is to arrange the valve holder so as to be readily inserted into the valve chamber through the same opening through which the valve is adapted to beinserted and removed'. v i

A still further object lis to arrange the pressure devices by which the valve is held to its seat so that the line of pressure is coaxial with the valve.

Another4 object is to associate with the driven pinion. .which rotates the valve holder, two opposeddriving gears adapted to be operated by hand and each mutilated in such manner that the valve holder will be rotated through limited arcs in one direction byv one gear and then similarly rotated in the opposite direction through a corresponding arc by the other gear.

Another object is to provide one of the gears and the driven shaft for the valve holder with co-acting element-s forinterrnit- EIS .1

tingly raising and lowering the valve Y,

and to its seat.

Other objects and uses will be brought out in the following description.

In' the drawings-Fignre I is a side teleration of a valve reseating device embodying the various features of my invention, a por.- tion .of the gear nearest to the point or" view being broken away to show the mutilated teeth of the opposite gear. Fig. 2 is an op.- posite face view of the saine device except that the gear nearest to the point of 'view is removed. Fig. 8 is a vertical sectional view taken on line 3-, Fig. l. Fig. a is a sectional view taken on line lv-4, Fig. 3.

While this machine is specially designed.

vor litt Valve to its seat and comprises essentally a valve holder -1- mounted upon a rotary axially movable shaft -2- which is journaled in suitable bearings -3- and 'is adapted to be rotated by means of a pinion -4- and suitable mutilated driving gears -5- and -6--. Thesey gears -5- and are keyed to a rotary shaft T- which is journaled in a bearing 8- ci a suitable supporting frame or standard -9- terminating in a suitable hand piece -10-, the lower end ofsaid frame being extended downwardly bet-Ween the gears "-5-` and -6 and connected tothe bearing -3 by means of a yoke *1lsaid yoke connecting the bearings -3 and -8- and hold'- ing them in fixed rela-tion lto each other.

The particular type of valve -ashow-vn in the draw-ings is usually provided with a slot 12h and with a convex upper 'face through which the slot extends and in orde-r to adapt-the holder to retain this particuiar form of valve, said vholder is provided with a central projection I3- and a concave lower face -14- the projection `-13- serving to enter the slot to 'cause the valve -ato rotate Vtherewith while the concave lower .face of the holder -l-- is made to conform to the convexity of the upper face of the valve so asto properly center said valve on its seat andv at the same time afford ample bearing to prevent lateral vibration of the valve during the .reseating operation.

The projection i3- 'is tapered slightly so as 'to wedge into the slot and thereby frictionally hold the valve during the intermittent elevation and depression 'of the holder as will be presently described but in addition to this means of holding the valve, l preferably make the holder of magnetizable metal adapted to attract and to hold the valve, which is usually made of iron, by magnetic attraction, said holder constituting an electro-magnet having a suitable winding -l5- of wire adapted to be connected to any source of electric energy as a battery -16-- and switch -17- shown diagramatical'ly in Fig. l.

The vertical shaft -2- extends downwardly some distance beyond the bearing '3- and into the holder 1 to which it is secured by a suitable key or pin -18-- to cause the holder to rotatewith the shaft, suitable space or clearance being left between the top of the holder and under side of the bearing -3- to permit limited vertical movement of the holder.

The holder -l is provided with a central lengthwise socket -19- open at the top and terminating some distance above the bottom for receiving one end of a spring -20-- the lower end of said spring bearing upon the lower side of the socket while its upper end bears upon thev upper side of the bearing `3` or rather a suitable bushing 2lconstituting a part of the bearing but it is preferably screw threaded and engaged with the hubv as 22 of the pinion -tto lock .said pinion against endwise movement and.

still form a bearing for the shaft.--2-.

v The pinion -4- is feathered by suitable key -23'- to the shaft -2 to move endwise therethrough, the hub of said pinion being journaled in the upper end ofthe bearing -3- and is adapted to mesh with the opposed gears -5f and -6- which are adapted to be rotated simultaneously by means of a hand piece -2.t on the gear -5-- as best seen in Figs. 1 and 3. These gears -5 and -6 are mutilated in such manner as to alternately rotate the valve holder -1- in reverse directions through approximately 90 or a quarter turn but under a comparatively high rate of speed during the continued rotation of the gears -5- and -6in the same direction and for this purpose the teeth of similar segmental parts of each gear are removed or rather alternate with similar segmental parts of each gear with teeth adapted to engage and rot-ate the pinion -4=-, shaft 2M and holder -1-4 through substantially a quarter revolution, the toothed segments of one gear being opposite the mutilated segments of the other gear so that when one set of teeth of one gear are in mesh with the pinion, the toothed segments of the other gear are out of mesh with eisers' rotated a quartier turn in reverse .di reffztioiiisA 'A The gears'e-,-Q and #-6- are necessarlly ofthesame pitch diameter and considerably each gear is -provided with '-a' series of toothed segments and mutilated segments alternating with each other, the toothed segment being of substantially the same circumferential. length as themutilated Seg'- ment so 'as-.soon as the mutilated segments of one gear are presented to the pinion, the toothed segments of the other gear engage and rotate the pinion in the reverse direction. During this rotation of the valve holder -1- which is pressed downwardly' by the spring -20, the valve is heldunder tension of the spring against its seat and the reverse rotation of said valve through limitedl arcs as previously described causes a more uniform grinding or polishing of actly fit each other, it being understood that flour of emery and oil or equivalent grinding material 1s interposed between the valve ing.

During the rotation of the valve in retingly elevatecand depress theI valve from and to its seat so as to avoid excessive'wear or channeling 1n one place by forerg'fm'at- :end of the shaft -2.- at each revolution of,y the gears -5- and -6- whereby thel shaft -9- is elevated against the action ofthe ranges the valve with its seat without breakin The operation of my invention is a's' vfol-I against the holder 1- which retains itin place by means of the wedge fit betweenthe by magnetic attraction due to the energizwhereupon the gears -w and-6- are the whole device being supported by the bearing .-3- upon any suitablefsupport,

alternating toothed segments of said gears said pinionfso'that the pinioneis" altelfiately?`l a suitable abrasive or polishing materialas spring --20- which assoon as the'pcani -25- passes the roller bearing '26-`, 'depresses the holder -1- and thereby' "ar-`l rotated by means of the hand piece v-2-,-

larger" than` thepinion -4- and therefore l `the valve and its seat so that they will eX- n and its seat during the operation of grindverse directions, it isl desirable to intermitter and for this purpose I provide the' garf' --5- with a cam Q5-which is-adapted toy engage a4 roller bearing *2G- on the upper-"10Q and its holder -ltogether with the valve the continuity of the gears 5w and'l-6. y110 lows: The operator places the valve '-"a-fy projection ---l3- and slot -12 and also v in of the core constituting the holder -1- `12,0 lnot shown, with the valve-aagainst its seat --Ljwhen the spring'l -204 is disy sienes and at each revolution of the latter, the shaft -2- carrying the holder -1- and valve --awill be temporarily elevated by the cam --25- and instantly depressed by the spring -20- to arrange the valve with its seat as soon as the' cam -25- passes the roller bearing Q6-,this action being lrepeat-ed until the valve and the' seat are properly ground to establish a perfect fitwith each other whereuponthe apparatus may he removed and the valve detached and reapplied to its seat for further use.

One or more of the toothed segments and blank spaces of each mutilated gear are of greater or less arc than the remaining segments: that is, two or more consecutive toothed segments may have a progressively increasing or decreasing numberfof't-eeth, the object of which is to rotate the valve through unequal arcs during succeeding reversals in. the direction of rotation to prevent contact of the same parts of the valve and seat with each other upon such reversal of movement. Y It is obvious that this variation in the arc of movement and consequent change in the contacting surfaces of the valve and seat may be effected by various means than that hereinbefore described, and applicant does not herein 'limit himself to the exact mechanism shown and described.

The support for the roller bearing 26- s held aga nst rotation by an arm *S0- having aA groove W31- riding upon a' rib --"2-- ou one side of the yoke -11'-," said support having a collar 33- and provided'with a screw 534-- which enters a groove --35- in the shaft --2-- so as topermit the rotation of the shaft in thehub or sleeve -33- and at the same time to afford means whereby the hub -33- and its arm Y --30-- are moved vertically with the shaft.

That I claim is:

l. A valve reseating device comprising a rotary electromagnetic valve holder, and mechanism for rotating the valve holder in reverse directions by the continued movement of said driving mechanism in the same direction, and means brought into action by the driving mechanism for intermittingly elevating the valve holder.

2. A valve reseating device comprising a rotary electromagnetic valve holder, and driving means therefor including a pair of mutilated gears acting alternately to rotate the holder in reverse directions by continued movement of the gears in the same direction, and means brought into action by the rotation of one of the gears for intermittingly elevating the valve holder.

3. A machine for reseating valves comprising a rotary velectromagnetic valve holder 'and driving means therefor including mechanism for rotating the valve through unequal arcs in reverse directions.

4. A hand operated reseating mechanism comprising a frame having a hand piece at one end, and a valve holding device rotatably mounted in its opposite end, ashaft journaled in the frame between the hand piece 4and rotary valve holder, a pinion mounted in the frame between the valve holder and shaft for rotating the valve holder, a gear mounted on the shaft and meshing with said pinion and provided with a hand piece whereby it may be rotated, and means actuated by the gear for elevating the valve holder once in each revolution of said gear.;

5. A hand operated reseating mechanism comprising a frame having 'a hand piece at one end, and a valve holding device rotatably mounted in its opposite end, a shaft journaled in the frame between the hand pieceV and rotary valve holder, a pinion mounted in the frame between the valve holder and'shaft for rotating the valve holder, a gear mounted ou the shaft and meshing with said pinion and provided with a hand piece whereby it may be rotated, means actuated by the gear for elevating the valve holder once in each revolution of said gear, and a spring L'for depressing the valve holder after each elevation by said means.

6. In a hand operated valve reseating device, the combination of a frame having a hand piece at one end, an axially movable rotatable shaft journaledin the opposite'end of the frame, a tool holder secured to said shaft and movable' axially therewith, a pinion journaled in said oppositeA end of the frame and feathered upon said shaft to permit the shaft to move axially therethrough, a driving shaft journaled in the frame between 'the pinionand hand piece, a gear secured to the shaft and meshing with said pinion to rotate the latter and also the first named shaft, means actuated by the gear for moving the shaft endwise in one direction at each revolution of the gear, and a spring for moving said first named shaft in the opposite direction when released by said means.

7. A hand operated valve reseating device comprising a frame having a hand piece at one end, a rotary tool holder-journaled in the. opposite end of the-frame, a inion for rotating said tool holder, a sha t journaled in the frame between the pinion and hand piece, and a Apair of mutilated gears secured tosaid shaft and alternately engaging opposite sides of the pinion, one of said gears -'being-provided'with a hand piece by which the shaft and both gears may be rotated, means actuated by one of the gears for moving the tool holder axially in one direction, and a spring for moving the tool holder in the opposite direction when released by said means.

8. A machine for reseatin valves, comprising means for reciprocatin the valve, and means for periodically rotating the valve through a greater arc in one direction than in vthe other direction, thereby progressively advancing the valve on its seat.

9. In a machine for reseating valves, the combination of means for imparting a reciprocating rotary motion to the valve, and means for periodically advancing the valve through a. greater arc in one direction than in the opposite direction, thereby progressively rotating the valve on its seat.

10. In a machine for reseating valves, the

combination of means for alternately rotatetapes ing the valve in opposite directions on its seat, and means for periodically advancing the 'valve in one direction, thereby progressively changing the position of the valve relative to its seat.

' In witness whereof I have hereunto set my hand this 20th day of March 1907.

ROBERT H. HAZELTINE.

Witnesses:

H. E. CHASE, C. M. MoCoRMAoK.