US1279341A - Valve-grinder. - Google Patents

Description

E. HEALY.

VALVE GRXNDER. APPLICATION FILED MAY 22. i918.

1,279,341. Patented Sept. 17, 1918.

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WITNESSES I v I ATTORNEY "mam", by c.

I EDMUND HEALY, F CULVER, OREGON.

VALVE-GRINDER.

Specification of Letters Patent.

Patented Sept. 17, 1918.

Application filed May 22, 1918. Serial No. 235,980:

To all whom it may concern:

Be it known that I, EDMUND HEALY, a citizen of the United States, residing at Culver, in the county of Jeficrson and State of Oregon, have invented certain new and useful Improvements in Valve-Grinders, of which the following is a specification.

This invention relates to grinding, and more especially to the treatment of metal curved surfaces; and the object of the same is to provide a handy tool for grinding automobile valves.

A further object is to provide pawl-andratchet mechanism whereby the ordinary oscillatory motion can be converted into rotary motion at will, and without removing the hands from the tool, so as to advance the valve being ground and to bring new faces thereof into contact with the valve seat.

Other objects will appear from the following specification and claims, and reference is made to the accompanying drawings wherein Figure 1 is a side elevation of this tool complete,

Fig. 2 is a vertical longitudinal section through the fork-arms and the parts carried thereby,

Fig. 3 is a sectional detail on the line 3+3 of Fig. 2, looking upward,

Fig. 4 is a perspective detail of the two ratchets and the cams removed and slightly separated from each other.

The bit 1 has points 2 for entering sockets in the ordinary valve, as well known. This bit is by preference detachably secured by means of a screw?) or otherwise to the lower end of the bit-stock 4, so that the bit maybe removed and replaced by another having difierently spaced points for use on a differ ent valve. The tool as sold will be supplied with a number of these bits for interchangeable use with the parts, as will be clearly understood. The upperiend of the stock is rotatably mounted in the lower arm 5 of a fork, this arm being detachably secured as by means of a screw 6 to the upper arm 7, the latter extending outward and carrying a handle 8 by means of which the instrument or tool is manipulated. The detachable connection between the arms of the fork is employed in order that the parts standing between them may be inserted and removed for cleaning, repair, or substitution, when worn,

The upper end of the stock is provided with an axial socket, shown in section in Fig. 2, for the reception of the hub 10 of a lower ratchet 11 whose body when in place overlies the upper face of the lower arm, and when the hub is connected with the stock by means of a pin inserted through registering'holes 12 therein, it will be clear that the ratchet wheel holds the stock in the arm while permitting it to rotate therein. At an appropriate point this ratchet is provided with a notch 13. Directly overlying the ratchet 11 is an upper ratchet wheel 14: having at an appropriate point a depending lug 15 for engaging the notch when the parts are assembled, and the two ratchets therefore become as one because they must rotate in unison. Attention is invited to the fact that the teeth of the lower ratchet face in one direction, whereas the teeth in the upper ratchet face in an opposite'direction. Superposed upon the upper ratchet is a cam 16 whose periphery is circular throughout most of its length but contains a rise at 17 and preferably has a stop 18 at the highest post of said rise. The two ratchets and the cam are disposed between the fork-arms in axial alinement with each other'and with the axis of the stock.

The numeral 20 designates a lamb whoseshank 21 is rotatably mounted through the upper arm 7, keyed within the cam 16 in any appropriate way as by flattening one side of the axial opening through said cam as indicated at 22, and reduced at its lower end to provide a spindle 23 which extends through central holes Qtand 25 in the upper and lower ratchets respectively, thereby rotatably supporting them in direct alinement with the axis of the stock 4 when the parts are assembled.

Mounted on a pin connecting the forkarms are two pawls, whereof the lowermost numbered 31 engages the lowermost ratchet 11 while the uppermost numbered 34 has a hook 33in its active edge to engage the uppermost ratchet 14-. Also this pawl has an upstanding pin 37 to be engaged by the riser 17 of the cam in a manner yet to be 6X1 plained. On a post 35 carried by the fork is a two-arm spring 36 bearing these pawls separately into active engagement under normal conditions with the teeth of the ratchets, from which it may be inferred that thelower pawl 32!.- stands in the plarie-otthe lower ratchet 11, the upper pawl 34 in the plane of the upper ratchet, and a pin. 37 rises above such plane and stands in the plane of the cam.

With this construction of parts, tion of this tool is as follows :As usual, powdered emery or other grinding. agent is smeared on the valve seat, and the valve dropped into place. Now the points 2' of the bit 1 are inserted into the usual openings in the valve, and, it becomes desirable to oscillate the valve on its seat and to grind it. as necessary to make it fit closely. As is well known, this oscillation is not quite a complete rotation in either direction by preference, althouh from time to time the valve should be turned and oscillated through a different path. This may be carried out by my tool. Bearing down on the knob 20' with theleft hand, the operatorgrasps' the handle 8 with his right hand and reciprocates it through perhaps one third or one half of a circle. Asit does so, the pawl 31 inconstant engagement 1'0 is fastened to the stock 4:, causes the bit to turn to and fro and the valve to oscillate through the path selected. When the handle 8 is swung in one direction this pawl and ratchet turns the stock, and" when the handle is swung inthe other direction, the hooked pawl 34 engaging the other ratchet 14: turns the stock in the other direction. Therefore the movement of the stock and the movement of the valve is oscillatory through the path selected. desires to permit the valve to advance on its seat so that subsequently it will be oscillated through a different path, he turns the knob 20 in the proper direction, and its shank, bein'g'keyed to the cam 16, turns the? same sothat the rise 17 thereof engages the pin- 37 until stopped by the projection 18, and the hooked pawl B l is thrown out of engagement with the upper ratchet 14. Subsequent reciprocation of the handle 8 therefore causes the other pawl-and-ratchet to function as usual, with the result that the hook and thevalve aread'vanced. Again the adv'ance is through he arc selected, and if we assume that it is about one third or perhaps one half of a circle, as soon eversesthe turning movement of the knob 20he throws the high point 17' of the cam 16 out from under the hooked pawl and: the spring 36 moves it to active position so: that thereafter the swing of the handle causes a reciprocation of the valve through. the new selected arc, instead of the old one. Thus the double ratchet, herein described as eompo'sed of twomembers, causes the desired end in a simple and effective manner.

The foregoing description and the drawin'gs have referencetowhat may be considcred. the preferred, invention; It is to-be understood that 1; may

'rangement and combination the op era I with the ratchet 11 whose hub When now the operator" as the operator or approved form of my make such changes in construction and arof parts, materials, dimensions, et cetera, as may prove expedient and fall within the scope of the appended claims.

Having thus fully described my invention, what I laim as new and desire to secure by Letters Patent, is I 1:. In a valve grinder, the combination with a bit and its stock, a knob and its shank, and a swinging handle in which said. shank and stock are rotatably mounted; of ratchet wheels on said shank and having oppositely facing teeth, a manually adjustable cam on said shank, spring actuated; 'pawl's pivoted to the handle and normally in rc-' spective engagement with the two ratchets, and a pin projecting from one ratchet'for engagement by said cam when turned, for the purpose set forth. 2. In a valve grinder, with a bit and its stock, a knob and its shank axially alined' with said stock, and a forked handle in whose arms saidzshankand stock are rotatably mounted; of a ratchet rotatable on said shank and fast to said stock. and having two sets of teeth facing in opposite directions, a pawl spring-pressed into" engagement with one set of teeth, a hooked pawl spring-pressed for normal engagement with the other set of teeth, a pinon the last.- named pawl, and a cam: onthe knob-shank for engagement with said pin at will to disengage this pawlf from its teeth, for'the purpose set forth. 4 g

' 3. In a valve grinder, the combination with a bit and its stock, a knob and its shank axially alined with said stock, handle in whose arms said shank and stock are rotatably mounted; of a ratchet rotata-. ble on said shank and between the arms of the fork and having two sets of teeth facingin opposite directions, a cam fast. on. said shank contiguous to said ratchet Wheel, a pin connecting the fork arms, spring pressed pawls mounted on said pin and normally in respective engagement with said ratchet faces, and a pin projecting from oneof saidfaces for engagement by said cam. when the knob is turned, for the purpose set forth.

l. In a valve grinder, the combination with a bit and its stock, a knob and" its shank, the latter'red-uced' at its lower end to form a spindle, and a fork through whose arms the stock and shank are respectively journaled in axial alinement, thenupper end of said stock being socketed; of a lower ratchet wheel having a hub fast in saidsocket, an upper ratchet wheel whose teeth face in the opposite direction from those in. thelowe'r wheel, to which wheel, it is secured, both rotatably mounted on said. spindle, acam fast onthe knob-shank above said spindle, spring-pressed pawls pivoted between the fork arms and engaging the respective the combination and a forked ratchet wheels, and a pin on one pawl for engagement by said cam, for the purpose set forth. I

5. In a valve grinder, the combination with a bit and its stock, a knob and its shank, the latter reduced at its lower end to form a spindle, and a fork through whose arms the stock and shank are respectively journaled in axial alinement, the upper end of said stock being socketed; of a lower ratchet wheel havin a hub fast in said socket, an upper ratc et wheel Whose teeth face in the opposite direction from those in the lower wheel, to which wheel it is secured, both rotatably mounted on said spindle, a pin through the fork arms, a lower pawl pivoted thereon for engagement with the teethof the lower ratchet, an upper pawl pivoted on the pin and hooked for engagement with the teeth of the upper ratchet, a pin rising from this pawl for engagement by said cam when the knob is turned, a post carried by one fork-arm, and a two-arm spring 011 the post bearing said pawls normally into the engagement described.

6. In a valve grinder, the combination with a bit and its stock, a knob and its shank, the latter reduced at its lower end to form a spindle, and a fork through whose arms the stock and shank are respectively journaled in axial alinement, the upper end of said stock being socketed; of a lower ratchet wheel having a hub fast in said socket, this ratchet having a notch, an upper ratchet wheel whose teeth face in the opposite direction, a lug on this ratchet adapted to engage said notch in the lower ratchet, forks rotatably mounted on said spindle, a cam keyed on the shank above the upper ratchet, spring-pressed pawls pivoted between the fork-arms and engaging the respective ratchet wheels, and a pin on one pawl for engagement by said cam, for the purpose set forth. 1 1

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

EDMUND HEKLY.

Witnesses:

S. D. PEROIVAL, D. W. BARNETT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, 11.0.

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