US558944A - Sylvania - Google Patents

Description

L. A H C I R A M Aw & D 0 0 G R W M W BLOWING ENGINE Patented Apr. 28, 1896.

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NITED STATES PATENT Orricn.4 Y

VILLIAM E. GOOD AND ARTHUR MARICIIAL, OF PHILADELPHIA, PENN-` SYLVANIA, ASSIGNORS TO THE SOUTI-IVARK FOUNDRY AND MACHINE COMPANY, OF SAME PLACE.

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SPECIFICATION forming part of Letters Patent No. 558,944, dated April 28, 1896.

Application filed May 27, 1893. Serial No. l1:75,(572. (No model.)

To all whom it may con/cern:

Be it known that We, WILLIAM E. GOOD, a citizen of the United States, and ARTHUR MARIOHAL, a subject of the King of Belgium, both residing in the city of Philadelphia, in the county of Philadelphia and State of Pen nsylvania, have invented a certain ,new and useful Improvement in Blowing-Engines or Compressors, of which the following is a true and exact description, reference being had to the accompanying drawing, which forms a part of the specification.

Our invention relates to the construction of blowing-engines or compressors for air or gas, and has for its object to provide improved valve-actuating mechanism for controlling and adjusting the movements of the valves through which the air is admitted to and delivered from the tub; and our invention consists in the combination, with the tub-valves, of a positively-actuated link valve-motion and of automatic means for adjusting the said valve-motion to alter the time of opening of the deliveryvalves With respect to the movement of the compressing-piston..

The nature of our improvements Will be best understood as described in connection with the drawing in which they are illustrated and which represents in elevation the tub of a blowing-engine, (shown in longitudinal section,) which at the upper end passes through one of the delivery-valves, the drawing also showing the link valve-motion and automatic adjusting device, but omitting the other parts of the engine as not being necessary to a full understanding of our present invention.

C indicates the compressing cylinder or tub, the heads thereof being indicated at C C.

D is the piston-rod, and D the piston working in the tub.

E2 indicates the shaft of the blowing-engine; IV W, branches of the receiver inclosing the delivery-valves at each end of the tub.

I indicates the delivery-valve; I', the delivery-valve spindle.` j

The admission-valves arey not shown, but may be of any ordinary construction, I-I indicating the valve-spindles to which they are attached. The spindles H of the admissionvalves are connected by links H2 with the arms J of levers J J2, pivoted at J, and with z the arms J2, to which is connected the actuconnected through a rod O and lever N N',`

pivoted at N2, With the short arm Q of a link Q, which will be hereinafter described. The spindles I of the delivery-valves are connected by rods I2 with the arms K of the levers K K2, each of which is pivoted at K and connected together with actuating mechanism by lneans of the rod M. The rod M is connected at a point q2 with a long arm Q2 ofY the link Q, which link, it will be seen, is supported by means of an eccentric-strap upon an eccentric P, secured in turn to the shaft E2. The link is supported, in addition, by means of rods S upon the upper ends of pivoted arms R, the lower ends of which arms are supported upon a standard or standards a. The point of attachment q by which the rod O is connected With the link Q is so close to the eccentric that no material variation in the motion of the rod and the valves connected with it is effected by changing the position of the pivoted arms R; but such a change in the position of these supporting arms materially affects the curve through which the point q2 travels, to which point the rod M is attached, and by adjusting the angular position of the arms R the motion of the delivery-valves can be `changed at will so as to make them open sooner or later.

To the extent above described the device shown forms the subject-matter of an individual application by Villiam E. Good filed herewith and bearing the serial number 474,518. Our present invention consists in combining with the arms R automatic adjusting mechanism by which their angular position will be governed and changed as the pressure in the receiver W increases or diminishes. We effect this by providing a cylinder U and a piston V moving therein and connected by a rod T with the arms R. "With the piston V we also connect, as by means of piston-rod V, a spring or equivalent mechanism actingV constantly to draw down the IOC arms R toward their' normal position when there is little or no pressure in the' receiver. l/Ve also connect with cylinder U a pipe or conduit w, connected at its other end with the receiver, the pressure entering the cylinder through this conduit acting in the opposite direction to that in which the spring z acts, the arrangement being such that as the pressure increases in the receiver the piston V is gradually pushed outward in the cylinderV, Overcoming the resistance of the spring ,e and raising the arms R, with the effect of changing the point at which the delivery-valves will open with respect to the movement of the piston D. This point should be that at which the pressure in the tub in front of the advancing piston and the pressure in the receiver is substantially equal. Consequently as the pressure in the receiver increases the time of openin g for the delivery-valve should be delayed.

Having now described our invention7 what we claim as new, and desire to secure by Letters Patent, is Y ln a blowing engine or compressor the combin ation of the tub, a discharge-valve, a link valve-motion, means for communicating 1notion from said valvennotion to the valve, a cylinder as U, a piston V moving in said cyliny der, and connected to mechanism for varying 3o the motion of the valve-1noti0n mechanism,

a conduit w leading from the receiver of the engine to the cylinder and a constantly-acting force as spring z arranged to act on piston V in the opposite direction to that in 3 5 which the air from the receiver moves it.

W. E. GOOD. A. MARICHAL. Vitnesses:

JAs. H. MALONEY, J. D. HAGENBUCH.

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