US68938A - William h - Google Patents

Description

W. H. BANGROPT &W. L. WARD.

STEAM ENGINE.

No. 68,938. Patented Sept. 17, 18-67.

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WILLIAM H..BANCROFT AND WILLIAM L. WARD, O F PORTLAND, WISCONSIN. Letters Patent No. 38,938, dated September 17, 1867.

IMPROVEMENT Ill STEAM ENGINES.

To ALL WHOM IT MAY CONCERN:

Be it known that we, WILLIAM H. HAM-norm and WILLIAM L. Warn, of Portland, in the county of Dodge, and State of Wisconsin, have invented a new and useful Improvement in Steam Engines; and ivc do hereby declare that the following is a full, clear, and exact description of the same, reference being bad to the annexed drawings, making part of this specification, in which- Figure 1 is a perspective vien.

Figure 2 is a cross-section of the ways and cross-heads Figure 3 is a longitudinal section of the main cylinder.

Figure 4 is a vertical longitudinal section of the first cylinder.

Figure 5 is a horizontal section of both cylinders.

The same letters are employedin the designation of identical ports'in all the figures.

A represents the shears, of suitable arrangement to support the 'mcchanism of the engine, on which rest the two cylinders B and C. The cylinder B we denominatc the .irst cylinder, which receives the steam and performs the function of an ordinary cylinder, and also, in combination "with the piston, acting as a cut-oil. The second cylinder G we will denominate the main cylinder. The first cylinder is divided into equal compartments by a partition, B. Wo pluce over the centre any proper valve, D, operated by the rods 1) attached to an eccentric on the shaft in the usual manner. E is the piston-rod of the first cylinder, which passes through the cylinder-head and through the partition B. It has attached to it the pistonheads E and E in the respective compartments. Steam is admitted to these coinpartmcnts through the ports F and F placed on each side of the partition B, and it escapes through theexit ports G G in the opposite ends of the compartments. The cylinders are connected by open ports, .at H H, at theends oi the main cylinder, on opposite sides of the pistonhead C The piston-rods are respectively connected with the cross-hearls'I I running upon parallel ways K K K, and these are connected, by ordinaryconnecting'rods, with the arms L and Lof a double crank, set at right angles to one another on the ends of the main shaft.

The operation of this engine is as follows: The piston-heads being as shown in fig. 4, steam will enter through the portF and, drive forward the piston-head E. When thc'piston-head has passed the port H the steam will rush into the main cylinder C, behind the piston-hoad O and "drive it in a direction opposite to that, traversed by the piston-head E. When the latter has reached tho end of the cylinder the steam will be admitted through the port F, in front of the piston-head E, and drive both piston-heads in the opposite-direction. The pistouvheads will pass the'ports H and'H at the some time, so that as soon as steam .is admitted through the port H the port H will be opened, and the exit of the steam from that side of the piston-head G will be per-- mitted. g

What we claim as our invention, and desire to secure by Letters Patent, is-.

The combination of the first cylinder B, having acentral partition, B, and the main cylinder C, with their respective pistons, said cylinders being co'nstrncted as to their ports, and arranged in relation to one another and to said pistons, substantiully as described.

In testimony whereofwo'havesignodour names to this specification in theprcsence of two subscribing witnesses.

WILLIAM- H. BANGROF'I, WILLIAM L. WARD.

Witnesses:

ABEL BANcnorr, Gnonsn A. Nnnsox.

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