US384213A - noedberg- - Google Patents

Description

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Bw. NORDBEBG. GUT-OEE FOR STEAM ENGINES.

No. 384,213. PatentedJune 5, 1888,.

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GUT-OEE EDR STEAM ENGINES. No. 884,218.. Patented June 5, 1888.

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UNITED STATE-s PATENT OFFICE.

BRUNO V. NORDBERG, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO THE l BRUNO NORDBERG COMPANY, OF SAME PLACE.

'CUT-OFF FOR STEAM-ENGINES.

SPECIFICATION forming part of Letters Patent No. 384,213, dated June 5, 1888.

Application tiled December 20, 1887. Serial No. 258,463. (No model.) d

To all whom it may concern:

Be it known that I, BRUNO V. NORDBERG, of Milwaukee, in the county of Milwaukee, and in theState of Wisconsin, have invented certain new and useful Improvements in Cut-Offs for Steam-Engines; and I do hereby declarethat the following is a full, clear, and exact description thereof.

My invention relates to automatic cut-offs for steam-engines, and will be fully described hereinafter.

In the drawings, Figure l is a vertical central section of my device, taken on aline at right angles to the crankshaft that connects my device with the eccentric of the engine. Fig. 2 is a vertical central section taken at right angles to that in Fig. l. Fig. 3 is a section on line o o, Fig. l. Fig. 4 is a section on line of o', Fig. 2. Fig. 5 is a detail in section of the main working parts. Fig. 6 is a detail in elevation. Fig. 7 is a plan or top view, and Fig. 8 is a section on line w w, Fig. 6.

A is thestand of my cut-off, and B is a hollow stem of the stand about which the governor-sleeve C revolves.

D is a trip-head that is suspended through the stem B by a rod, c, and keeper b. The lower end of the trip-head is beveled, as shown in Figs. 1 and 5, and one face of this bevel is designed for engagement with the inclined surface e of a triplevcr, E. This trip-lever E is toggled at its lower end to the arinf of a cranksleeve, F, by a link, g, and the crank-sleeveF is keyed onto the rockshaft G, which latter has bearings b in' each side of the stand A. The ends of pin b2, that connect the link g and trip -lever to each other, extend across the jacket H, and are secured in the sides thereof, so that when the trip -lever reciprocates the jacket H and spring-barrel 7L will reciprocate with it.

H is an upright cylinder that is fitted in stand A so as to he capable of vertical recipv rocation therein, and the pin b2, that connects the link g with trip -lever Efpasses through openings in the sides of this cylinder and into the sides of the loose jacket H. f

The stand A has a slot, A', in one side, an through this slot the barrel h is screwed into a screw-threaded opening in jacket H, and projects through a slot into cylinder H', and in this barrel a spring, z', is housed, that one end will bear against the trip-lever E and force it into the path of a lifting-pin,j, that projects from one side to the other of cylinder H. The lifting-pin j has a recess, 91.on one side, in which the lever Efits loosely, and at this point presents a plane surface to the adjacent vertical face of lever E, and the face of said lever is formed with a shoulder, 0, for engagement with the under side of said pinj.

The cylinder H', which forms the valvehanger, has a stem, K, that projects down through a partition, M, in the stand A, where it is provided with nuts N, between which and the partition M a spring, P, is interposed for retracting thevalve hanger after it is lifted.

The governhr-arms R are pivoted to brackets S, that project from the sleeve C, and the rounded ends of their inner arms fit-loosely in slots 1- in keeper b, so that as the balls fall the stern c will be lifted, and as they rise the stem a will be depressed. The sleeve is connected with the pulley-shaft T by suitable gearing, and the pulley T is belted to the engine, as usual.

The operation of my device is as follows: When the parts are in the position shown in Fig. 1, the engine has just completed a stroke and the valve K is closed. Now, as the shaft Gis turned back by the eccentric, (not shown,) the arm fof sleeve F will lift upon link g, and as the arm f and link g approach a vertical line they will by toggle action lift the trip-arm E and cause it to lift upon piuj, and the cylinder H will be raised to open the valve until the inclined face e of the trip-head D wedges the trip far enough to one side to disengage notch o from pin j, when the cylinder H will be dropped, while arm f, passing the deadcenter, will draw the trip-arm down in position for its notch to again engage the pin j. This tripping will occur sooner or later in the stroke of the engine, according to the position 0f the governor-arms. When the balls are raised, the head D, being depressed,will act on the trip-arm quickly, and vice versa.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-'- 1. The combination, in a cut-off for steamengines, of atripping-head connected with the and its engaging-pin, of thejacket, the rockt5 shaft and lift-ing trip-lever toggled to the rockshaft, and the spring for forcing the lifting trip-lever into engagement with the pin of the valve-hanger, as set forth.

In testimony that I claim the foregoing I 2o have hereunto set my hand, at Milwaukee, in the county of Milwaukee and State of W'iseonsin, in the presence of two witnesses.

BRUNO v. NORDBERG.

Vitnesses:

S. S'. STOUT, N. E. OLiPHANT.

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