US33957A - Improved mode of operating giffard s injector - Google Patents

Description

UNITED STATES PATENT OFFICE.

JAMES MILLHOLLAND, OF READING, PENNSYLVANIA.

IMPROVED MODE OF OPERATING GIFFARDS INJECTOR.

Specification forming part of Letters Patent No. 33,957, dated December 1'7, 1861.

To all whom it may concern:

Be it known that I, J AMESl MTLLHOLLAND, of Reading, Berks county, Pennsylvania, have invented a new and Improved Mode of Operating Giffards Injector; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

My invention consists in operating the perforated tube and internal rod of a Giffard inj ector by levers arranged substantially as explained hereinafter, the said levers being provided with the appliances hereinafter described or their equivalents, so that they can be operated together or independently of each other.

My invention has for its object the placing of the injector in such a position on a locomotive that the supply of Water to the instrument from the tank will depend upon the direct flow of water fronrthe same, and not upon the aspiration of the instrument itself, as usual, the levers at the same time affording the engineer every facility for readily operating the moving parts of the injector.

In order to enable others to make and use my invention, I will now proceed to describe its construction and operation.

On reference to the accompanying drawings, which form a part of this specification, Figure l is a sectional view of Giifards injector with my improved arrangement of levers for operating the same, and Fig. 2 is an end view.

A is the body of a Giffard injector, the general construction of which is too familiar to engineers to need minute description. B is the pipe through which the steam from the boiler is admitted to the injector. G isthe feed-pipe; H, the overfiow-pipe; I, the pipe through which the water is forced into the boiler, and J the check-valve, K being the perforated conicalended tube for regulating the supply of Water admitted to the injector, and L the internal rod for regulating the jet of steam. The outer end of the perforated tube K is furnished with a collar, a, into the groove of which fit pins projecting from the forked end of the lever M, the latter having its fulcrum on a pin, fm, secured in a suitable position to the outside of the lirebox of the locomotive. The internal rod, L, is

provided with a collar, b, into the groove of which fit pins projecting from the forked end of the lever N, which has its f ulcrum on a pin, n, secured to the side of the tire-box. The two levers M and N are so arranged as to be adjacent to each other, and are of such a length as to be within reach of the engineer on the platform of the locomotive.

To the upper end of the lever M is jointed a rod, P,Which is arranged to pass freely through a permanent staple, Q, the latter being provided with a set-screw, d, by means of which the rod P, and consequently the levers M and N, may be secured after adjustment.

To the upper end of the lever N is jointed a rod, R, through a longitudinal slot in which passes a screw on the lever M, this screw being provided With a nut, t, on loosening which the levers may be operated independently of each other. On tightening the nut, however, the levers must move together.

Prior to starting the injector to work the levers M and N are Vdisconnected from each other, andthe set-screw d of the staple Q loosened. The lever M is then so moved as to partially withdraw the perforated tube K from the body of the injector, thereby allowing the water from the pipe G to flow into the instrument. The internal rod, L, is now moved outward by means of the lever N, thereby allowing the steam to pass through the perforated tube K into the instrument, and to force the water through the pipe G into the boiler in the manner Well known to those familiar with Giffards injectors. The perforated tube K and internal rod, L, having been adjusted to the desired position, the nuts CZ and tare tightened, thereby connecting the two levers M and N together and securing both in the position to which they have been adjusted.

When the engineer desires to arrest the action of the injector, he loosens the set-screw d and moves the levers M and N simultaneously, thereby operating the perforated tube K and internal rod, L, at the same time. It will be evident that a simultaneous movement of the two levers by the engineer will restore the action of the injector.

In operating the perforated tube and internal rod for producing the above results it is necessary that the rod should be moved a greater distance than the tube. At the same time it is desirable that the upper ends or handles of the two levers should remain connected together and move simultaneously; hence the arm of the lever IWI is longer than that of the lever N.

It has been usual hitherto to operate the perforated tubes and internal rods of injectors by screws, and to place the injectors themselves in such an elevated position on the tirebox of the locomotive that these operatingserews may be within reach of the engineer, Owing` to this elevated position of the injectors they are generally below the level of the feed-Water in the tank, so that the supply of water must be obtained by the aspiration of the instrument itself, which is well known to be objectionable.

By employing` the levers M and N for operating` the perforated tube and internal rod of the injector, the latter may be secured so low downen the fire-box of the locomotive that the water will Iiow directly from the tank into the instrument; at the same time the levers present the most efficient means of rapidly manipulating the instrument.

In some locomotives it may be advisable to place the injector in a vertical or angular position, in which case bell-crank or curved levers may be substituted for the straight levers M and N.

I claim as my invention and desire to secure by Letters Patent- Operating the perforated tube and internal rod of a Giffard injector by levers IWI and N, arranged substantially as described7 the said levers being provided with the appliances herein described or their equivalents, so that they can be operated together orindependently of each other, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing` witnesses.

JAMES MILLHOLLAND.

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