US1634526A - Locomotive - Google Patents

Description

LOCOMOTIVE Filed Oct. 15. 1926 Hel fl WIRTH,

\NVENT m WK Patented July 5, 1927.

UNlTED' STATES PATENT OFFICE.

HEINRICH WIRTH, OF MUNICH, GERMANY, ASSIGNOR TO THE FIRM J. .A. MAFFEI, OF MUNICH, GERMANY.

LOCOMOTIVE.

Application filed October 15, 1926, Serial No. 141,704, and in Germany April 9, 1926.

The invention relates to locomotives of the kind having two separately driven bogies, as in the Well known brarrat, Fairly, Meyer and Mallet types.

The object of the invention is to effect certain improvements in regard to the position of the centre of gravity, the distribution of the weight of the frame (making the same generally uniform but variable within certain limits), rigidity of the connection between the coal bunker and boiler, space available for a long boiler, and support of the main frame by the bogies without the pivots.

According to the invention the boiler, cab and a coal bunker behind the cab are carried by a main frame resting in front on the frame of a bogey, which also supports a container for part of the water. Another part of the water is stored below the boiler, or at both sides of the same or of the main frame. Another supply of water may be carried behind the coal bunker, or at both sides thereof. The water containers may be connected with each other to allow of transfer of their contents as required. By making the forward water container comparatively small, increased space is obtained so that an economically working boiler with long fire-tubes can be obtained. The main frame extends rearwards below the containers and rests on the rear bogey, which does not directly carry any water or coal supply. The pivots have no part in supporting the weight of the main frame, and can be placed wherever most suitable for the curves to be negotiated. The fixed connection of a coal bunker with the rear of the boiler renders the arrangement of an automatic stoker much easier than is the case where a loose tender is used. The centre of gravity is low, and the regulatable distribution of the water supply reduces the tendency of the bogies to rock. The pivots being free from load, they do not impose any restriction on theweight which can be placed on the bogies without impairing flexibility. The invention thus enables very heavy and economical high-speed locomotives to be used on tracks with difficult gradients andcurves.

A locomotive designed according to the annexed drawings, in which Fig. 1 is a side view and Fig. 2 a plan view.

There are three main parts. The boiler, a cab 1), lower tank 0 and bunker d, with an additional rear tank 6 if required, form a rigid structure with the main frame 7. The latter is connected bya pivot g with the forward bogey it, but rests thereon by means of bearing pins 2'. The forward bogey carries a tank 74. The frame f is connected to the rear bogey h by means of a pivot g and bearing pins i Z, Z are the cylinders.

Instead of the pivot g and pins 2', or of the pivot g and pins 7?, a ball joint may be used, serving both as support and as pivot. The pivot pins 2', or 2' may be elastically supported, to prevent a twisting strain'where one rail level is higher than the other.

Having now particularly described and as certained the nature of my invention and in what manner the same is to be performed, I declare that what I claim is: I

1. A locomotive having two independently driven bogies, one supporting the main frame only and the other supporting the main frame and a storage container, 'the main frame, which carries the boiler and cab, having a rearward extension with a bunker or a bunker and tank thereon, and the forward bogey carrying a tank.

2. A locomotive as claimed in claim 1, with a tank on the mainframe between the same.

3. A locomotive as claimed in claim 1, wherein separate pivotal and weight carrying connections are provided between the main frame and each or either of the bogies. In testimony whereof I hereunto afiix my signature.

HEINRICH WIRTH.

invention is shown diagrammatically in the v

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