US67392A - All whom it may concern - Google Patents

Description

@uiten tatts l gd-it'ttttt4 @frn FURMA N wins N, o F Nnwnroltn, N. Y. l LcltersiPatent No. 67,392, dated Jt'y 3Q, 1867.

TO' ALL WHOM IT MAY CONCERN: il' Be it known that I, FURMAN R. WILSON, of the city and Stute of New York, have invented certain new and'u'seful Improvements in Steam Stam'pngll'lills; anddohereby declare that the following is a full, clear, and exact description ofthe construction and operation of the same, reference being had to the annexed drawings, forming part hereof, and to the letters of reference marked thereon, in which drawings Figure 1 is a perspective view ol' a stamping-mill, with my improvements added. Figure 2, a side view oi' lever It, and of some of the parts immediately connected with it. Figurc 3, a vertical section of the piston, piston-rod, cam-rod, and cam. l The nature of my invention consists of acombination ol mechanism for operating the valves which admit steam into the cylinder below the piston, and also a combination of mechanism for operating the valves which -admit steam into the cylinder above thepiston, for the doublc purpose hereinafter mentioned.

To enable others skilled in the art to make and use my improvements, I will proceed to describe their construction and mode of operation. v

The drawings represent a mill of two stamps, but it is to bevunderstood that a mill may comprise either a Asingle stamp, or any number of stamps desired. With a view toclearne'ss, I shall describe my improvements es applied to the parts which constitute a single stamp, promising that the same description will apply to euch stamp employed.

In iig. 1, A is a strongframe of wood; B n steam-cylinder, with lugs a, through which it is bolted to the frame A. C is the mortar. D, the die. E is the piston-rod or stamp-rod, which has the stamp F attached to its lower end in' the usual manner-. G and Gare steamchests. II, pipes which convey the steam into the steam-chests. I I', cocks for-regulating the supply of steam. J, pipes throng-'5h which thesteam exhausts. K- is the cam-rod,which is attached tothe piston, as shown inv g- -3- The 1,0dK 0,llllllgh'u stVufing-box in the cylinder-head, and has a cam, c, screwed or otherwise fastened on its' upper end. The cam c must have suliicient swell in the middle to bringr it in contact with the lever R, as hereinafter described; but it is not necessary that it should be of the exact form shown; it may be curved continuously from' end to end, so that a longitudinal section of it would be about elliptical. LA is the rod attached to the lower valve, which is an ordinary sliding-valve. The rod L has two shoulders vor collars d d', which limit the play ofthe lever M. The I lever M slides through ordinary journal-boxes, which are attached to supporting standards or arms O 0', the latter being firmly secured to the frame A. A reciprocating motion ,is given to the lever M by means' of a crank, Q. The elect of this arrangement is such thatv the valve-rod L is moved intermittently, pausing in its l motion while the arm P of lever M traverses from shoulder d to the shoulder df, and nice versa. This pausing of the 4valve-rod L causes the valve-port for admitting steam to remain open for a time sullicient to secure the Y full stroke-of the piston upward. R is a lever turning on e. fulcrum-pin, S, and supported froml the frume-A by the standard T. The lower end of lever Ris attached by a exiblc joint to the valve-rod U, which is attached` to an ordinary sliding-valve for the admission of steam above the piston. The leverR works automatically, and is provided with friction-rollers g z.

When'thc piston is at thc limit of its downward stroke the lever R is in such position that the exhaustport of the upper valve is open,l and it is allowed to remain open until the piston has nearly reached the limitl of its upward stroke, when the cam c comes in contact with the friction-roller g of lever R, forcing the upper i end of this lever outward and its lower end inward, thereby closing the exhaust-port and opening. the supplyport of the upper valve. The steam thus admitted operates both to cushion the piston and start 1t with forcel on its downward stroke. The supply-port of the upper valve remains open until the piston' has travelled about two-thirds of its downward stroke, when the cam c comes in contact with roller t 'of lever R, drawing out the vulve-rod U, thereby closing the supply-port and opening the exhaust-port of the upper valve. i

The cylinder B is made longer than the stroke which the piston is intended to have when the stamp 1s new i or unworn, there being .a space of' from fourv to six inches indepth between the piston 'when at the limit of its downward stroke and the lower head of the cylinder, the object being to obviate the strikingof the piston, xn

I its downward stroke, againstthe head last mentioned when the'stamp F shall have become worn by use.

This mechanism, when supported by a properly-constructed frame, may be employed as a steam-hammer.

Having thus described my improvements, I claim, and desire to secure by'Letters :Patent-j- '1. The combination of the crank Q, sliding-lever M, and valve-rod Lin the manner. and for the purpose substantially as set forth.

' 2. The combination 'of rod K, cam c, lcverwR, and rod U, in the manner and for the purpose substantially asset forth. l R. WILSON.

Witnesses:

FRANKLIN SMALL,

Guo.l E. Buckner.

Images