US1237189A - Valve-grinder. - Google Patents

Description

W. E. FINKBEINER.

VALVE GRINDER APPL |CATION FILED NOV. 10. 1916.

1,237,189. Patented Aug. 14,1917.

WILLIAM FINKBEINER, OF PORT CHESTER, NEW YORK.

VALVE-GRINDER.

Specification of Letters Patent. t t 7 Application'filed November 10, 1916. Serial No. 130,640.

' Taall whom it may concern.

Be it known that I, WILLIAM E. FIN-K4 BEINER, a citizen of the United States, reslding at Port Chester, in the county of West-- chester and State of New York, have invented new and useful Improvements in Valve-Grinders, of which the following is a specification.

This invention relates to valve grinders and has for its principal object the provision of an efficient tool of this character which will consistently grind the valve against its seat, giving absolute uniformity to the valve to enable it to make an effective and tight closure against its seat.

A still further object of the invention resides in the provision of a valve grinder including a holder for the valve and mecha nism for oscillating the same and for setting up uniformity in the grinding action by a novel form of ratchet mechanism Which includes a plurality-of sets of fixed ratchet teeth upon the device, an oscillating actu-' ator, and a rocking dog, the latter having two effective engaging ends which are adapted to be peculiarly and singly advanced against the teeth of the respective sets as the actuator is oscillated.

A still further object ofthe invention resides in the provision ofa valve grinder which is capable. of being positively and accurately controlled; one which is simple, strong and durable, and one which may be handled with efficiency in a comparatively small space.

With the above and other objects in view which will appear as the nature of the insists in the improved construction and novel arrangements of parts which will hereinafter be fully described and particularly pointed out in the claims.

In the accompanying drawings, has been illustrated, a single and preferred form of the invention, it being, however, understood 7 that no limitations are necessarily madeto the precise structural details therein exhibing the application thereof to a valve.

Fig. 2 is a horizontal section therethrough.

Fig. 3 is a vertical section through the same on an enlarged scale.

Fig. 4 is an inverted perspective view of the actuator.

Fig. 5 is a perspective view of the rocking dog and the shifting mechanism.

The device consists of a shaft 1, having a reduced extension 2, which is freely rotatable in a bushing 3, carried by an axial knob 4, or the equivalent thereof. The said knob is secured in position against the extension 2, by means of a fastening screw 5. The shaft is provided at its lower end with a collar 6, and superposed relatively thereof is a valve gripping member 7,'carrying relatively resilient branches 88, which terminate in claw-like extensions 9, which maybe engaged with the valve as conventionally illustrated in. Fig. 1. Said claw-like extensions 9, are held operatively associated with the valve by means of an adjusting collar 10, which is slidablc over the branches 88. Thesaid branches are flared in order that they may be drawn toward each other when the collar 10,is moved in a downward direction. When said collar is moved in an oppo .site direction, the said branches 88, separate under their normal or inherent rcsiliency. In addition to the just mentioned means which I employ for the purpose of holding the valve during the grinding operation, I provide a rocking head 11, mounted upon the lower end of said shaft 1, in order that pressure can be applied to the valve throughthe application of force applied against said axial knob 4. The head 11, car ries depending lugs 12--12, which are adapted to be extended into the usual spanner openings in the valve.

Freely mounted upon the shaft '1, is an actuator 13, having an annular 'wall. 14, which is provided with grooves 15 and 16. A power transmitting device 17, is employed and is adapted to be reciprocated manually.. However, it may be operated in any suitable Well known manner. 'At any event, it is employed for the purpose of transferring ordinary reciprocal movements into rotary and oscillating movements and for this purpose it is equippedwith a flexible connection 18, having convolutions 19, arranged around the grooves 15 and16. One branch of this con nection is fixedly secured at 20, to the member 17, while the opposite branch finds a yieldable mounting in a coiled spring 21, carried by said member 17. In this manner the mentioned convolutions 19, of said flexi-' ble connection, are held under tension against the walls of the grooves 15 and 16, and immediately on reciprocating said member 17 power will be transmitted uniformly to the member. The actuator is equipped with a handle 22 to be grasped by one hand of the user while the other hand is positioned against the knob 4, for the purpose of steadying the tool relatively of the valve and for holding thelatter against its seat during. the grinding operation. i

A guide bracket and support 23, is provided for the purpose of holding the power transmitting device against the actuator and at a tangent thereto. Said support is provided with a branch 24, which is positioned beneath the knob and is apertured to receive the lower end of the bushing 3, as shown in Fixed upon the shaft in any'suitable manner is a pair of ratchet surfaces 26 and 27 whose teeth stand in difl'erent planes, face in opposite direction, and have their faces disposed midway between each other, and both surfaces stand within the annular wall of the actuator. Pivoted on a-stud 30 depending from the body of the actuator within its wall is a rocking dog 25, whose extremities constitute pawls 28 and 29 which stand in different planes so that they respectively coact with the teeth in the ratchet sur faces 26 and 27, and the tips of the pawls are so spaced from each other that when one is in engagement with the working face of a tooth in its surface, the other is midway between two teeth in its surface and is of course canted or thrown'outward by the engagement of the first-named pawl. For turning the dog on its pivotal supporting stud 30, a shifting device 32 is employed, whose construction is best seen in Fig. 5. At one end it has a pair ofgripping arms 34 which frictionally embrace the shaft 1, at its other end it has a slot 31 loosely inclosing the stud 30 as to permit alittle lost movement of this end of the shifter as explained below, and between its ends it has an up struck lug 33 of a length sufficient only to engage the pawl 28.

The action of the ratchet mechanism above described is as follows :The actuator 13 is operated by the reciprocations of the member 17 in alternately-opposite directions. As the actuator turns ,to the left in Fig. 2, the

stud 30 carries the idog 25 which starts moving at once, whereas the frictional grip of the arms 34 of the shifting device 32 upon the shaft holds said device against rotary -movement until the stud has traveled the length of the slot 31. Its positive engagement with one end of the slot then causes the shlfter to move, and meanwhile the lug 33 in the path of the pawl 28 has directed the tip of the latter inward into engagement with one of the teeth in the ratchet 26. Thereafter the movement of the actuator in this direction positively turns the ratchet and therefore the shaft 1.. As soon as the actuator has completed its stroke in this direction and commences to move in the opposite direction, it of course carries the stud 30 with it. The stud carries the dog, which now stands in such position that its forward or advancing pawl 29 is out of the line of the teeth 27 as seen-in Fig. 2 and will remain out of such line until its rearward pawl 28 moves out from beneath the lug 33 and rides over the beveled face of the'next tooth in its ring or ratchet 26 This rocks or shifts the dog 25 on its pivot and throws the pawl 29,

inward into active engagement with the next tooth beyond in the ring or ratchet 29, and

the result is that the rotation of the shaft 1' in the opposite direction doesnot begin until the dog has passed over one tooth. Meanwhile the stud has traveled the length of' i the slot 31, and struck its remote end as seen in Fig. 5, and then further movement of the stud swings the shifter 32 around the shaft 1 so that its lug 33 is restored to a position where it is in readiness to assume its function in the second complete operation which follows and is similar to that already described.

B use of the eculiar pawl and ratchet mechanism descri ed, the oscillations of the actuator are communicated to the tool inopposite directions and to difl'erent degrees, and it will be clear that one gains on the other and therefore the grinding is not done an actuator loose on the shaft, means for imparting oscillations in alternately opposite directions to the actuator, a lurality of sets of ratchet teeth carried by t e shaft, the teeth of one'set facing oppositely to the teeth of the other, a rocking dog carried by the actuator and having a pawl for each set of t eth, and mechanism for successively advancing said dog with its pawls in co-acting engagement with said sets of teeth.

2. A valve grinder comprisin an oscillating shaft having a valve gripping device, an oscillating actuator on the. shaft, a power transmitting device for the actuator, a plurality of annular series of ratchet teeth carried by the shaft, the'tecth of one series being extended at an opposite angle to that of the teeth of the other series, a rocking dog carried by the actuator, and. mechanism for successively advancing said dog into coacting engagement with said series of teeth.

3. A valve grinder comprising an oscillating shaft, a valve holding device thereon, a plurality of sets of ratchet teeth fixedly mounted upon the shaft, the teeth of one set bein extended at an opposite angle to'that of t e teeth of the other set, both of said sets of teeth being located in juxta-position to each other, an actuator mounted to rotate upon the shaft, a rocking dog carried by the actuator, and means for changin the relation of the dog to said sets of teet 1.

4. A valve grinder comprising an oscillating shaft, a valve holding device thereon,

.a plurality of sets'of ratchet teeth fixedly mounted upon the shaft, the teeth of one set facing in an opposite direction to the teeth of the other set, both of said sets of teeth being located in juxta-position to each other, an actuator mounted to rotate upon the shaft, a rocking dog carried by the actuator, and means for changing the relation of the dog to said sets of teeth and comprising a rocking member carried by the actuator and engaging the dog and provided with arms adapted'to frictionally grip the shaft.

5. A valve grinder comprising a rotary valve holder, a shaft connected therewith and carrying oppositely facing ratchet surfaces, a dog, means independent of the holder for supporting said dog, means for transmitting motion to said first means and automatically controlled mechanism for alternately throwing the dog into co-acting engagement with said ratchet surfaces to successively change the direction of rotation of the holder during operation of the transmitting means.

6. A valve grinder comprising a rotary valve holder, a shaft connected therewith and carrying oppositely ,facingratchet surfaces, an actuator mounted to revolve on said shaft, a rocking do carried bysaid actuator, and means for a ternately advanc-' ing the dog against the teeth of one of said surfaces and against the teeth of the other surface.

In testimony whereof I affix my signature.

WILLIAM E. FINKBEINER.

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