US617249A

US617249A - Engine

Info

Publication number: US617249A
Authority: US
Publication date: 1899-01-03
Anticipated expiration: 1916-01-03

Description

Patented 1an. -3, |899.

D. P. HARTMAN.

ENGINE.

(Application tiled Sept. 17, 1897.)

3 Sheets-Sheet l.

(No Model.)

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o] P. HARTMAN.

ENGINE.

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No. 617,249. Patented 1an. 3, |899.

' u. P. HARTMAN.

ENGINE.

l (Application med sept. 17, 1897.) (No Model.) 3 Sheets-Shui 3.

OLLIS P. HARTMAN, OF TAYLOR, TEXAS.

ENGINE.

SPECIFICATION forming part of Letters Patent No. 617,249, dated January 3, 1899.

Application filed September 17, 1897. Serial No. 652,061; (No model.)

TactZZ whom it may concern.-

Be it known that I, OLLIs P. HARTMAN, a citizen of the United States of America, residing at Taylor, in the county of Williamson and State of Texas, have invented certain new and useful Improvements in. Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to engines; and it consists of the construction, combination,- and arrangement of parts which will be hereinafter more fully described and claimed.

In the drawings formin ga part of this specication, Figure 1 represents a perspective view of an engine constructed according to my invention. Fig. 2 is a vertical longitudinal section through the high andlow pressure cylinders and the parts connected directly thereto. Fig. 3 is a side elevation of the same, showing the cover of the steamchest and the valve which moves therein removed. Fig. 4 is an end elevation of the highpressure cylinder, showing the parts leading therefrom to the low-pressure cylinder, the low-pressure cylinder being shown partly in section and partly in elevation. Fig. 5 is a horizontal section through the steam-chest, showing thevhigh-pressure cylinder partly broken away.

Like reference-numerals indicate like parts in the different views.

The high-pressure cylinder 1 is horizontally arranged and has the low-pressure cylinder 2 mounted upon it. The piston 3 and the piston-rod i of the high-pressure cylinder are both of the ordinary form and construction. Pivoted to the outer end of the piston-rod f1 is a pitman 5, which is pivoted eccentrically to a disk G upon the drive-shaft 7, so that the reciprocation of the piston 3 will cause a rotation of said shaft. Upon one side of the cylinder 1 is the steam-chest S, having the live-steam inlet-pipe 9 entering the same at one end. Steam-inlet ports 10 11 lead from the steam-chest 8 to the interior of the cylinder 1, at opposite ends thereof. Exhaust- `ports 12 and 13 communicate with the exhaust-steam feed-pipes 1-1 and 15, respectively, which enter the low-pressure cylinder 2, at the upper and lower ends thereof. The

said ports

10, 11, 12, and 13 are controlled by a slide-valve 1G, whose stern 17 extends through one end of the chest 8 and is suitably connected with an eccentric upon the drive-shaft 7 or other suitable part of the engine, whereby the reciprocation of said valve at the proper time will be effected.

The low pressure cylinder has moving therein the piston 18, the piston-rod 19 of which extends through the head of the cylinder and is coupled through a link 2CD with one arm of a rocking lever or walking-'beam 21, which is fulcrumed at a point intermediate of its ends to the upright or standard 22, as clearly shown in Fig. 1 of the drawings. The opposite end of said walking-beam is connected through the rod or pitman 23 with the disk 6, at the point of attachment of the pitman 5 therewith. Upon the upper end of the cylinder`2 is located a guide-frame 21, consisting of a base and four upwardly-extending parallel arms 25, between which iits and moves the walking-beam or rocking lever 21. The said beam 'is prevented from lateral displacement by saidA guide-arms in a manner which is apparent. The'upper end of the piston-rod 19, adjacent to its point of connection with the link 20, is formed with laterally-extending lugs or projections 26, which are located at right angles to the walkingbeam 21 and fit and move between the guidearms 25. These prevent a movement of the piston-rod 19 in the direction of the length of the beam 21, so that by the provision of the four arms 25 said piston-rod is caused to move in a direct vertical line.

Adjacent to the upper and lower enzds of of the low-pressure cylinder 2 are rotary exhaust-

valves

27 and 28, respectively, the same communicating with a single exhaust-pipe 29. The stems 30 of said valves lead outwardly from their casings and have connected to `them crank-arms 31 31. The said crank-arms are in turn connected together by a rod or bar 32, which is pivoted at a point intermediate of its ends to an auxiliary walkingbeam or rocking lever 33, fulcruined in the upright 22 and connected at its opposite end to a pitman 34, attached to a ring 35 upon an eccentric 36 on the drive-shaft 7. By this construction it will be observed that the power from the high-pressure cylinder l will be exerted through the piston 3, piston-rod 4, pitman 5, and disk 5 directly upon the driveshaft 7. The power from the low-pressure cylinder 2 also will be exerted through the piston 18, piston -rod 19, link 20, Walkingbeam 2l, pitman 23, and disk 6 upon the drive-shaft 7. As the pitmen 5 and 23, however, are connected to the disk 6 at an angle it will be evident that a dead-center can never exist. It will also be observed that by means of the eccentric 30 on the drive-shaft and the auxiliary Walking-beam 33, which is connected to the rod 32 and through it to the valves 27 2S, the rotation of said shaft Will automatically cause the actuation of said valves at the proper time, the same being so located relatively one to the other that when one is closed the other will be open and exhausting.

Having now described the invention, what is claimed as new is- The combination with the cylinder of an engine and the piston-rod thereof, of lateral projections on said piston-rod, a Walking beam pivoted thereto, and means for guiding said piston-rod in a direct line, consisting of a guide frame having four parallel arms thereon, between one pair of whichsaid Walking-beam ts and moves and is prevented from lateral displacement, and between the other pair of which said lateral projections t and move and are prevented from lateral displacement in the direction of the length of said walking-beam.

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

OLLIS I. I-IARTMAN.

Witnesses:

HENRY I-IARTM AN, FR. YOUNG.