US752400A - Valve mechanism - Google Patents

Description

No. 752,400. PATENTED FEB. 10, 1904.

a. KROMER. VALVE MECHANISM.

APPLICATION FILED MAR. 16. 1903.

NO. MODEL. 2 SHEETS-SHEET 1.

WITNESSES: v INVENTOR ATTORNEY mg mama PmRs cu. excruumo. wgsuma'iou 1:.(1

No. 752,400.- I 'PATBNTED FEB. 16, 1904. E KROMER. VALVE MECHANISM.

APPLIOATIOK FILED MAR. 16. 1903.

2 SHEETS-SHEET 2 NO MODEL.

WITNESSES: INVENTOR I 7 2m /mm/ I I BY ATTORNEY.

THE cams wsrzns co. womm'wmwnsmuumu, o c

i that indicated in Fig. 1.

UNITED STATES Patented February 16, 1904.

PATENT OFFICE.

VALVE MECHANISM.

SPECIFICATION forming part of Letters Patent No. 752,400, dated February 16, 1904.

7 Application filed March 16, 1903.

To all whom it may concern:

Be it known that I, EMANUEL KRoMnR, acitizen of the United States, residing at Newark, in the county of Licking and State of Ohio, have invented a certain new and useful Improvement in Valve Mechanism, of which the following is a specification.

My invention relates to the improvement of valve mechanism for steam-engine cylinders; and the objects of my invention are to provide an improved valve mechanism of this class of superior construction and arrangement of parts, to provide improved means whereby a reversal in the running of the engine may be attained by the sliding of the valveseat, and to produce other improvements, the details of which will be more fully pointed out hereinafter. These objectsl accomplish in the manner illustrated in the accompanying drawings, in which Figure 1 is a vertical longitudinal sectionv through a steam-chest and a portionof the steam-cylinder with which said steam-chest is connected. Fig. 2 is a similar view showing the position of the valve-when the piston is being driven in the opposite direction from Fig. 3 is a similar sectional view showing the position of the valve-seat when the latter is thrown to the reverse position, and Fig. 4 is a transverse section on line at w of Fig. 1.

Similar numerals refer to similar parts throughout the several views.

1 represents a steam-cylinder, and 2 a steamchest, which is suitably connected with said cylinder in any desired manner. In the wall or partition 2*, which separates the steam chest and cylinder, I form a central exhaust-port 3 and on opposite sides of the latter ports 4 and 5, the latter communicating with passages 6 and 7, which lead to opposite ends of the cylinder 1. Supported in contact with the partition or wall 2 is a sliding valve-seat 8, the latter being in the nature of an oblong plate which has formed transversely therein a central port 9 and on opposite sides of the latter pairs of separated ports, as 10 and 11 and 13 and 14. vAbove and upon the movable valve-seat 8 is supported a sliding valve-plate 15, the latter having formed therein separated in the usual manner with the eccentric.

Serial No. 147,934. (No model.)

ports 16, 17, 18, and 19. Rising from the opposite edges of the valve plate 15 are the sidewalls of a cap 20, the latter having outturned base-flanges 21, through which pass loosely vertically-mounted bolts 22, the lower threaded ends of which are secured in threaded sockets of the valve-seat 8. Between the cap base-flanges 21 and the upper enlarged ends or heads of the bolts 22 are interposed springs 23. The side walls of the cap 20 are connected in their lower portions by transverse cross-bars 20?, between which and the valve-seat the valve 15 is adapted to slide.

24 represents the steam-inlet for the chest 2. Connected with the slide-valve 15 is the usual valve-rod 25,which leads through a boxing at one end of the steam-chest and connects WVith one end of the sliding valve-seat is also connected an outwardly-extending sliding operating-rod 26, with which may be connected an operating-lever or other suitable means for moving the same longitudinally when desired for the purpose hereinafter described.

In Fig. 1 of the drawings I have shown the movable valve-seat and the slide-valve in such positions with reference to each other and to the ports 4 and 5 as to insure the admission of steam from the steam-chest to the end of the steam-cylinder at the right through the medium of the connected ports 19, 14, and 5 and the exhaust of the steam in front of the piston through the connected ports 4, 11, 17, and 18.

In Fig. 2 of the drawings I have shown the position of the parts when the outward movement of. the valve-rod 25 has resulted in a corresponding sliding movement of the valve 15. In this position, as will be seen in Fig. 2, the ports 16, 10, and a will be brought into communication, the port 14 closed, and the ports 18 and 13 brought into communication with the passage 5, with the result that the live steam will be directed through the ports 16, 10, and 4 to the end of the cylinder at the left and the piston, which is indicated at 27, driven to the right. The steam in front of said piston when the parts are in the last described position will exhaust through'the passage 5, ports 13 and 18, and exhaust-ports 17.

For the purpose of describing the means and operation of reversing the motion of the engine we will assume that the parts are in the position indicated in Fig. 1 of the drawing and that the piston 27 has been moved to the left to a position substantially that shown in Fig. 3. A movement of the valve-seat-opparts being in this position, it is obvious that the live steam may pass from the steam-chest through the ports 16, 10, and 4 and passage 6, resulting in the piston 27 traveling back to its position at the right of the cylinder 1 and in the steam exhausting through the ports 5, 13, and 18 to the exhaust-ports 9 and 3. At the next movement of the slide-valve in the opposite direction, which occurs as the piston reaches the end of the cylinder to the right, the piston will be given its full stroke to the left and the reciprocating motion thereof thus continued, with the result that the motion of the engine is changed or reversed.

' From the construction and operation described it will be seen that instead of employing the usual link-motion or other mechanism to impart through the slide-valve a reversal of the engine this reversal is attained by the employment of a suitably operated sliding valve-seat.

It will be understood that the pressure of the steam within the steam-chest in conjunction with the tension of the springs 23 will serve to hold the cap 20 in proper frictional contact with the valve 15 andto hold the latter in desirable contact with the sliding valveseat 8.

Having now fully described my invention, what I claim, and desire to secure by Letters Patent, is v 1. In a valve mechanism for engine-cylinders, the combination with a steam-cylinder and steam-chest, the wall between said cylinvalve-seat and the ports and passages of said wall to alternately permit the passage of steam to opposite ends of said cylinder, substantially as specified.

2. In a valve mechanism for steam-cylinders, the combination with a steam cylinder and steam-chest, the wall between the same having an exhaust-port and passages 6 and 7 on opposite sides thereof leading to opposite ends of the cylinder, said passages having enlarged mouth portions, of a sliding valve having port 17 and a comparatively small port on each side thereof and a slidable valve-seat having a port 9. and pairsof ports on opposite sides thereof adapted to communicate simultaneously with the enlarged mouths of the passages 6 and 7 substantially as specified.

3. In a valve mechanism for engine-cylinders, the combination with a steam-cylinder and steam-chest, the wall between said cylinder and chest having passages leading to opposite ends ofthe cylinder and communicating with the steam-chest, of a valve seat mounted to slide against said wall, and having a plurality of ports as described, a sliding valve on said valve-seat having a plurality of ports as described, and a cap-body 20 connected with and rising from the said valveseat and springs adapted to exert a downward pressure on said cap and hold the sliding valve in contact with V the sliding valve-seat when the parts are not subjected to steam-pressure, substantially as specified.

EMANUEL KROMER. In presence of F. L. WOODBRIDGE, ALVAH D. HAYES.

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