US1569515A - Locomotive-exhaust-nozzle covering - Google Patents

Description

Jan. 12 1926.

A. G. MACHESNEY LDCQMOTIVE EXHAUST NOZZLE COVERING Filed March 13 1922 2 Sheets-Sheet 1 Jan. 12 1926. 1,569,515

I A. G. MACHESNEY LQCOMOTIVE EXHAUST NOZZLE COVERING Filed March 15. 1922 v 2 Sheetsw-Sheet 2 R A HIP nill' M v awuwdcoz Patented Jan. 12, 1926.

u-mirso STATES ANDREW G. MACHES'NKEY, onnnrruozr, Mien-roan, Assienon To nntrnorr LUBRICA- TOR ooMrANxoF DETROIT, MlGHiGAN, ACORPORATION or MICHIGAN.

LOGQMOTIVE-EXHAUST-NOZZLE COVERING.

To all whom) it may concern:

Be it known that I, ANDREW G. l\/IAOHES- NEY, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Locomotive-Exhaust-Nozzle Coverings, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to exhaust nozzles for locomotives through which the exhaust steam is discharged into the stack to create a draft. It is the object of the invention to provide means for preventing the drawing into said nozzle of smoke, gas and cinders, which frequently occurs when the locomotive is drifting with the steam shut off under such conditions, the pistons and cylinders constituting in effect a pump, which, being in communication with the smoke box through the nozzle, will draw in smoke, gas and cinders to the detriment of the valves, pistons and other working parts. The invention therefore consists in the novel means for avoiding the detrimental action above referred to and consists in the con struction as hereinafter set forth.

In the drawings:

Figure l is a cross-section through a locomotive smoke box showing the nozzle with my improvement applied thereto;

Figure 2 is a longitudinal section therethrough;

Figure 3 is a cross-section;

Figure 4 is a plan view of the protecting device as applied to a double nozzle;

Figure 5 is an end elevation thereof.

A is the exhaust nozzle in a locomotive smoke box B and which is directed upward into the flaring lower end of the stack C.

My improvement consists essentially in an automatically operating closure E for the nozzle which is opened by the discharge of steam. As shown and preferably applied, this closure is in the form of a hinged cover plate attached to the discharge end of the nozzle and so balanced that it will be closed by gravity, or by the vibration of parts, or by suction from the cylinders, but will be moved by the discharging steam out of the path thereof.

As shown in detail, F is a flange which is usually provided on the nozzles. G is an exchangeable nozzle tip, which is usually provided by locomotive builders to vary the action of the discharge jet. This tip I preferably employ as a seat for the cover E, while the hinge for the cover is attached to the flange F. As shown, H are eyebolts secured to the flange F by the nuts I. J is a hinged lug extending rearward from the cover E and K is a cross bolt or pin forming the hinge connection between the lug J and eyebolts H. The lug J is preferably cut away as indicated at J, so that any cinders or other dirt collecting on the hinge will not bind the same. There is also provided the stop lug L for arresting movement of the cover after the opening of the nozzle and the balance of the construction is such that it is in unstable equilibrium in this arrested position. Therefore, the cover will automatically close by gravity, or by suction, and will remain open only so long as steam is discharging from the nozzle.

In order that the engineer may be sure of the position of the cover, I preferably provide an indicator which as shown comprises a rod M attached to the cover and projecting outward beyond the shell of the smoke box. At the outer end of this rod is a ball N which is in a pocket 0 when the cover is closed, but is projected out from said pocket, as indicated in dotted lines, when the cover is open. Therefore the engineer will know at a glance whether the cover plate is open or closed.

In many locomotives the exhaust from both cylinders is conducted into a single nozzle, but in some constructions there is provided a double nozzle. For the latter construction I employ two cover plates, as shown in Figs. 3 and 4, and which are respectively turned up on opposite sides of the nozzles when in open position.

What I claim as my invention is:

1. The combination with a locomotive exhaust discharge nozzle, of a cover plate adapted to seat on the discharge end of said nozzle, a hinged connection between said cover plate and nozzle permitting the opening of the same by the discharge of steam, and a stop for limiting the opening movement of said cover to a position fro-m which it will automatically close.

2. The combination with a locomotive exhaust discharge nozzle provided with a discharge tip, of a cover plate adapted to seat upon said discharge tip, a hinged connection between said cover and the nozzle permitting of the opening of the former by the discharge of steam, and a lug for arresting the opening movement of said cover, the balance of the parts being such that the cover will automatically close from its arrested position.

3. The combination with a locomotive exhaust discharge nozzle having a flange adjacent to its upper end, of a cover plate for closing the discharge end of said nozzle, eyebolts secured to said flange, a hinged connection between said cover plate and eyebolts permitting of the opening of the cover by the discharge of steam, and means for automatically closing said cover.

In testimony whereof I afiix my signature.

ANDREW G. MAOHESNEY.

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