US1299773A - Governing mechanism for steam-engines. - Google Patents

Description

A. E. PETERS.

GOVERNING MECHANISM FOR STEAMENGINES.

APPLICATION FILED OCT. 7, l9I6..

1,299,773. Patented Apr. 8, 1919.

2 SHEETS-SHEET l.

A. E. PETERS.

GOVERNING MECHANISM FQR STEAM ENGINES. APPLICATION FILED 0017, I916.

I 1,299,773, a Patented Apr. 8,1919

2 SHEETS-SHEET 2.

iinirnn sate rns PATENT onnrce.

ARTHUR E. PETERS, OF EAS'ION, PENNSYLVANIA, ASSIGNOR TO INGERSOLL-RAND COMPANY, OF JERSEY CITY, NEW JERSEY,A CORPORATION OF NEW JERSEY.

GOVERNING MECHANISM FOR STEAM-ENGINES.

To all whom it may concern:

Be it known that I, ARTHUR E. PETERS, a citizen of the United States, residing at Easton, in the county of Northampton and State of Pennsylvania, have invented a certain new and useful Improvement in Governing Mechanism for Steam-Engines, of which the following is a specification.

This invention relates to governing mechanism for steam engines, and more particularly to governing mechanism for steam engines of the puppet valve type.

In machines of this type, such as shown, for instance, in the patent to Lentz, No. 659,892, dated October 16th, 1900, the valves are operated by eccentrics mounted on a lay shaft, the governing of the engine being accomplished by varying the throw ,of the eccentrics controlling the inlet valve and hence the amount of steam admitted.

The object of the present invention is to provide a simple and efiective mechanism for varying the throw of the admission eccentrics which will enable the engine to be successfully operated through a wide range of speeds, the amount of steam admitted to the engine cylinder being controlled by regulating the point in the piston stroke at which the admission of steam to the cylinder is out OE.

With this object in view, a governing mechanism has been devised, a practical embodiment of which is represented in the accompanying drawings, in which- Figure 1 shows a side elevation of the up per portion of a steam cylinder of the above mentioned type, provided with my invention, the governing mechanism being shown in section,

Fig. 2 shows a transverse section of the lay shaft and governing mechanism on the line 2-2 of Fig. 1, and

Fig. 3 shows a transverse section on the line 33 of Fig. 1.

In the drawings is shown a steam cylinder 1 provided with inlet valves 2, the exhaust valves not being shown. Parallel to the cylinder is a lay shaft 3, driven in any well known manner, for instance, by gearing from the engine shaft. The lay shaft 3 is hollow, and fitted therein is a concentric adjusting rod 4, adapted to rotate with the shaft 3, but movable laterally therein. Rotatably mounted on the lay shaft 3 is a sleeve 5 on which are secured eccentric adjusting cams 6.

Specification of Letters Patent.

Patented Apr. 8, 1919.

' Application filed October 7, 1916. Serial No. 124,246.

Mounted on these eccentric cams are inlet valve operating eccentrics 7, the valves being operated by the eccentrics 7 through the usual rods 8. The cams 6 and eccentrics 7 at the two ends are identical except that they are placed at opposite positions on the lay shaft so that they operate alternately. Rigidly mounted on the shaft 3 are flanged collars 9, the eccentrics 10 for controlling the exhaust valves being secured to these collars and operated therethrough, the throw of these eccentricsand hence the period of exhaust of the engine remaining at all times constant. Each inlet valve eccentric 7 is operatively connected to the shaft 3 also through one of the flanged collars 9 by a link 11 which is secured at opposite ends to these parts by pins 12 as shown in Fig. 2. This link connection 11 between the collar 9 and eccentric 7 allows the eccentric 7 a limited radial movement suiiicient to cover the maximum and minimum cut oils for which the engine is designed. On the inner end of the rod 4 is a cam operating key 13 which has inner helical portions 14 engaging helical slots 15 in the shaft 3 and outer straight portions 16 which engage straight slots 17 in the sleeve 5. It will thus be apparent that as the rod 4 is moved longitudinally. of the shaft 3, the sleeve 5, and thereby the eccentric came 6, will be rotated by the key 13, with respect to the shaft 3, thereby varying the position of the admission eccentrics 7. The relative proportions and eccentricity of the inlet valve operating eccentrics 7 and the adjusting cams 6 are so calculated that the rotation of the cams 6 will vary the lift of the inlet valves and hence advance or delay the cut off of the admitted steam. The lateral movement of the rod 4: can be controlled in various ways. It can be done by hand, but in the present instance I have shown it diagrammatically as controlled by an automatic governing mechanism such as shown in the patent to Raymond, No. 1,177,895, dated March 2d, 1915. In this governor the rod 1 is connected to a piston 18 sliding in a cylinder 19, this piston being moved in a direction to quicken the cut off of the admitted steam by the increase in the pressure of the oil or other liquid transmitted through the pipe 20 from the regulator proper 21 as the load on the engine decreases, oil being furnished to the regulator from a pump 22, the details of this mechanism forming no part of the prescut invention, but being fully described in the abovementioned patent.

It is to be understood that while I have shown this form of mechanism for operating the rod 4:, any other form oficontrol might be used, and that while the present showing and description discloses only one specific embodiment of the present invention, other forms and modifications are included within the spirit and scope thereof, as expressed in the appended claims.

What I claim is:

'1. In a steam engine governing mecha nism, a shaft, an eccentric sleeve thereon, an inlet valve eccentric mounted on said sleeve, a collar on said shaft rotating therewith, an exhaust valve eccentric keyed to said collar, a pin and link driving connection between said collar and inlet valve eccentric allowing limited movement between said collar and inlet valve eccentric, means for rotating the shaft and means for varying the position Copies of this patent may he obtained forfive cents each, by addressing the Commissioner of Batents,

a pin and link driving connection between said collar and inlet valve eccentric allowing limited movement between the collar and eccentric, a rod in said shaft adapted to rotate with and move laterally in said shaft and a helical connection between said shaft, rod

and sleeve to rotate the sleeve in respect to,

the shaft as the rod moves laterally in said shaft to vary the throw of the inlet valve eccentric.

In testimony whereof, I have hereunto set my hand.

ARTHUR E. PETERS. Witnesses:

WALTER F. SMITH, MILTON H. SCHAFFEK,

Washington, D. C.

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