US1063904A - Direct-acting fluid-engine. - Google Patents

Description

W. ANTHONY.

DIRECT ACTING FLUID ENGINE.

APPLIOATION FILED MAR. zo, 1913.

1,063,904, Patented June 3, 1913.

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DIRECT-ACTING FLUID-ENGINE.

Specification of Letters Patent.

Patented June 3, 21,913.

Application filed March 29, 1913. Serial No. 757,543.

To all whom 'it may concern:

,Be it known that l, VYNNxuo ANTHONY, subject ot the King oit' Great Britain, residing at Capel House, Colchester, in the county ot' Essex, England, have invented new and useful Improvements in Direct-Acting Fluid-Engines of the Positive-Action Type. ot which the following is a specification.

rlhis invention relates to improvements in means for etleeting the distribution ot the pressure-fluid in a reciprocating' engine ot the type in which the displacement ot the slideevalve is initiated by a t'orce mechanically transmitted from the moving parts ol the engine and completed by the pressure oil the ope 'ating lluid on its admission to an auxiliary cylinder which contains a .tixed piston. Now according to the present invention, the said auxiliary cylinder is so constructed7 mounted and operated that it is required to undergo a longitiulinal displacement relatively to the valve and subsequently cause the initial displacement oit the valve.l the e'tl'ect oitl the combined displacements bcing the admission to, and evacuation `from, the said auxiliary cylinder of the pressurefluid resulting in the completion ot the travel ot the valve.

The invention includes other improvements which will be described by reference to the accompanying drawing.

ln this drawing: Figure l is a central long'itudinal section, and Fig. 2 is a transverse section taken along the line 2-2 of F ig. l.

In these iigures the several parts of the mechanism o the engine which are relevant to the present invention are shown in the relative positions which they will occupy when the displacement of the valve by the mechanically transmitted force is about to cease and its travel completed by the operation of the pressure-fluid.

rlhe piston a ot the main engine is supposed to be traveling` from left t0 right and approaching the end of its stroke, the valve being mechanically urged from right to .left by the thrust ot' the rod c. In the position shown, the port leading to the passage all, which has been and is still admitting high pressure fluid to the left-hand side ot' the piston c, is closing and the port which is permitting the evacuation of the spent fluid from the rigl'it-hand side ot' the piston through the passage Z2 to the exhaust passage c is also closing. lVhen the valve l) has been mechanically urged by the rod c a short distance iliarther, the auxiliary valvemoto-r comes into operation and innnediately conveys the valve into its extreme position to the le'lt admitting the pressure-tluid through the passage (Z2 tothe right-hand side oit the piston o and causing its direction ot" motion to be reversed.

The valve-motor consists ol a cylinder which is slidably mounted on the, back ot' the slide-valvc Y) and within the cylinder is fitted a piston f/ which is prevented itrom longitudinal motion relatively to the valvecasing lz. As shown in the drawing, the piston f/ is secured to a rod f the enlarged head f' ot `which is inserted within a socket m secured to the valve-casing /1. lhe cyl inder f on being displaced by the rod c causes the slide-valve c to travel thereuf'ith by the engagement ot a projection fl on the cylinder with one end o ol. the slide-valve, the movement ol" the slide-valve in the contrary direction being drn'ived by the engagement ol a corresponding projection f2 on the cylinder f with the other end 7) o't` the slidevalve. .ln transferring the engagement from f1 to a small amount ol." relative motion between j and will take place. lly virtue ot this displacement of f relatively to 7A), passages :lormed partly in f and partly in are alternately brought .into and taken out oil register with each other. ln the Dosition shown it will be seen that a passage n formed in f, and shown in dotted lines, is in register with a passage 0 il'orined in Through the combined passage a 0 pressurefluid will be able to enter the letthand end ol? the cylinder f when the extremity of the passage o becomes uncovered by the further displacement of the valve 7) to the left. There is also another passage 79 'formed in j leading trom the right end thereof which, in the position shown is in register with another passage o 'lormed in and through this combined passage y) f/ spent lluid contained in the right-hand end ot f will be able to escape to the exhaust passage e when, by the further movement ot' the valve to the lett, the extremity oi f7 comes into register with a recess r tormed in the lace of the cylinder. The combined passages n o and 7) z] are opened sinuiltaneously and permit pressure-fluid to enter the lett end of the cylinder and be evacuated from the right end thereof. This will have the effect of rapidly displacing the cylinder 7 to its eX- treme position to the left and require it to carry therewith the slide-valve o. The passage Z2 Will in this manner become immediately Wide open for the admission of the high-pressure fluid to the right-hand side of the main piston a and so reverse its direction of motion.

The reversal of the motion of the piston a will cause a reversal of the motion of the rod o, the head c1 of Which, When it has moved sufficiently to make contact With the notched extremity s1 of the socket s, Will convey the cylinder f with it. The first effect of the return movement of f Will be to cause the projection f2 to approach the left end Z22 of the slide-valve and close the passages n o and p g by placing the portions thereof out of register With one another. VVhen f2 engages with b2 a pair of passages corresponding to n o but adapted to admit pressure-fluid to the right-hand end of the cylinder f Will come into register and so also Will a pair of passages corresponding to p g for the evacuation of fluid from the left end of j. The passages alternative to n 0 and j? Q are omitted from the drawing.

A. starting lever t passing in a fluid-tight manner through the cover u of the valvecasing 7L is provided. On the removal of the cover a the piston and cylinder elements or the valve-motor and also the slide-valve Z) can be removed for examination and rettingand as these elements contain the passages a 0, j? g and also the corresponding alternative passages, they can be readily cleared if choked. By the provision of an aperture o in the back of the slide-valve the. pressure in the space w between f and Will be maintained at the exhaust-pressure and the higher fluid-pressure will keep both f and b Well seated on one another and on the cylinder-face.

claim 1. In a reciprocating engine, a cylinder, a valve casing having inlet and exhaust ports for passage of motive Huid to and from the cylinder, a main slide valve in said valve casing movable across said ports, and having passages therein, a movable cylinder in said valve casing in contact With said valve and having a limited amount of movement in relation to said valve, said movable cylinder having passages adapted to coperate with the passages in the slide valve, means having a lost motion connection With the cylinder for imparting initial movement thereto, and a stationary piston in said cylinder.

2. In a reciprocating engine, a cylinder, a valve casing having inlet and exhaust ports for passage of motive fluid to and from the cylinder, a main slide valve in said valve casing movable across said ports and having passages therein Whose communication with the valve casing is controlled by the movement of the valve, a movable cylinder in the valve casing in contact With the valve and h aving a lost motion connection therewith, a fluid passage to said chamber, said movable cylinder having passages coperating With the passages in the main valve, means operated from a moving part of the engine having a lost motion connectionl With said cylinder for moving the same, and manually controllable means for operating said Inovable cylinder.

In testimony whereof I have signed my name to this specification in the presence of tivo subscribing Witnesses.

VYNNARD ANTHONY.

Witnesses:

H. W. WAGHORN, O. J. lVoRTH.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

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