US1687374A - Valve-resurfacing machine - Google Patents

Description

Oct. 9, 1928.

F. E. LONGLEY VALVE RESURFAC ING MACHINE Filed June 8, 1927 Fran 1k E. Lp rr g/gy [TN E Patented Get. 9, 1928.

warren STATES FRANK E. LONGLEY, 0F LYNN, MASSACHUSETTS.

VALVE-RESURFACING MACHINE.

fApplication filed June 8,

My invention relates to valve resurfacing machines, popularly known as valve face grinders. It has for its purposes to simplify and quicken the process of valve face grinding or resurfacing; to cover the full resurfacing area with one revolution of the valve holding shaft; to provide an eflicient means adaptable for the varying speeds required and desirable in rough, finished and the intermediate stages of valve face grinding; to provide a new and novel means for valve face grinding and resurfacing utilizing side action on a so-called cup grinding wheel; to provide a new and novel position and means for holding the valve face on the grinding surface; to simplify the mechanism of valve face grinding and resurfacing machines; to insure a fixed, positive and uniform pressure of the valve face against the grinding surface, variableat the operators will; to provide a quick releasing spring action, operated by a hand wheel mounted on a threaded shaft controlling a yoke pressure against the spring holding collar, on the valve carrying chuck shaft, to and in which quick releasing action the spring pressure is exerted in the direction away from the used portion of the grinding surface; to provide asimplified means for adjusting the valve carrying shaft to the angles of varying grinding and resurfacing requirements; and to provide the various other advantages and results made evident from the following specification.

I accomplish the objects of my invention as shown in the accompanying drawings which form a part of this specification and in which. Figure 1 shows a top view of my improved grinder with a valve in position therein ready for grinding. Figure 2 shows aside view of my valve holding and feeding mechanism. Figure 3 shows an end view of my holding and feeding mechanism.

Referrin main to Fi ure 1 A shows a motor from which the driving power is derived. B shows the cup shaped grinding wheel. 0 shows the valve chuck shaft. D shows the chuck within which the valve stem E is securely held. F shows the face of the valve to be ground or resurfaced. G and H show the bearings in which thevalve carrying chuck shaft is mounted. I shows the hand. wheel with which the shaft 0 is rotated. J shows the releasing spring positioned about the shaft C and exerting its 1927. Serial No. 197,482

pressure against the collar K tending to force the faceof the valve F away from the used M shows a hand wheel mounted on the threaded shaft N which turns in the bearing 0, forcing the end of the shaft N as the wheelis turned to the right against the yoke P, causing said yoke to press against the collar K, compressing the spring J and at the same time insuring a positive and uniform pressure of, the valve face F against the grinding surface L. Turning the hand wheel M to the left releases the tension ofthe spring J and forces the valve face F away from the grinding surface. One revolution of the hand wheel I creates contact of the full valve face area with the grinding surface, and makes availableeither a slow or speedy grinding operation, at the will of the operator. Q. shows a bolt by which the shaft carrying carriage is secured to the foundation R. A series of orifices S, S are designed to allow for the adjustment and positioning of the shaft at any desired angle with reference. to the grinding surface, the adjustment being made by loosening the bolt Q and tightening same after the exact position has been secured.

While I have illustrated and described a preferred construction for carrying my invention into effect, this is capable of variation or modification without departing from the spirit of the invent-ion. I therefore do not wish to be limited to the exact details of construction herein set forth but desire to avail .myself of such variations and, modifications as come within the scope of the appended claims.

Having thus described my invention I claim as new and desire to secure by Letters Patent of the United States of America 1. The combination in a valve grinding mechanism, a grinding element, an adjustable support for the valve to be ground, means for holding said support in adjusted position at an angle with respect to the portion of the grinding surface L.-

grinding element and to one side thereof, a

pressure axially thereof to urge the valve against the adjustable means to normally cushion and resist the movement of the valve toward the, grinding element.

2. The combination in a valve grinding mechanism, a grinding element having a cupped grinding Wheel, an adjustable support for the valve to be ground mounted at an angle with respect'to the grinding element and toone side thereof, and means for holding said support in adjusted position, a shaft on said support and having a chuck thereon for gripping the valve stem, a collar on the shaft, a pivoted yoke on the support and engaging the collar on the shaft, an arm carried by the yoke, and means including a positively adjustable threaded shaft, and a wheel thereon acting upon the arm to actuate the yoke to move the shaft and valve toward the'g'rinding element," and a spring surrounding the shaft and engaging the collar and the support at its respective ends and exerting its pressure axially of the shaft to urge the valve away from the grinding means to cushion and resist movement of the valve by the positive adjusting means.

In testimony whereof I affix my signature.

FRANK E. toNGLEY;

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