US1470684A - Meter for fluids - Google Patents

Description

Get. 16, 1923. 1,470,684

E. B. CADE METER FOR FLUIDS Filed Nov. 15, 1921 EZZOJBL (0d? alifo'unuaq lll iii

' stares earner EH08 B. CADgE, OF PORTLAND, OREGON, ASSIGNOE T0 AMERICAN LIQUID METER coat- PAN'L', OF WETLAND, GREGG-Iii, A CQRPOEATION OF WASHINGTON.

manna roa rrnrns.

application filled November 15, 192i. tierlal lilo. 515,1???

To all whom it may concern:

Be it known that l, Enos B. CADE, a citizen ofthe United States of America, and resident of the cit of Portland, county of Multnomah, and tate of ()regon, have invented certain new and useful Improvements in Meters for Fluids, of which the following is a specification. I

My invention relates to fluid meters of the type wherein a piston, reciprocable in a cylinder and actuating control valves by its movement, forms the metering element.

An important object is the simplification of such meters and the production of a meter which will be compact, easily operable and accurate.

Further objects are to provide in such a fluid meter means for controlling and looking the valves in certain positions, and to provide improved means for releasing the valves when the metering member has reached the end of its stroke.

Another object is to provide means where- 4 by the oint of release of the valve may be adjusted.

My invention comprises those novel parts and combinations thereof which are shown in the accompanying drawings, described in the specification and particularly defined by the claims terminating the same.

In the accompanying drawings I have shown my invention in the form which is now preferred by me. 1

Figure 1 is a section through my meter, taken on a horizontal plane.

Figures 2 and 3 are, respectively, sections on lines 2--2 and 3-3 of Figure 1.

My piston is of the general type described above, the present form comprising a cylinder 1, closed by two heads 10, the cylinder and heads having intake passages 11 and exhaust passages 12, and a piston 2 reciprocable withinthe cylinder to form the inetering element. Control valves 3, of which I have shown one at each end, by their rover-- sal allord communication alternately between the intake passage 11 or exhaust passage 12 and its respective endof the cylinder.

The valves 3 l have shown as tubular valves having the intake ports 31 registering- With intake passages 1-3 in the fixed bushing l5, and having exhaust ports 32registrable with exhaust passages 14 in the bushing 15. The two valves are secured upon opposite ends of the rod 33, the valves being axially alined. Aspring 35 is interposed between each valve and the piston 2 and is compressible as the piston advances, and upon release of the valve holding meansto be later described, operatesv to reverse the position of its respective valve 3 and the valve controlling mechanism.

The valve controlling mechanism includes, for each valve, one or more dogs 4, of which I have shown two for each valve, these beingpivoted in the cylinder head 10, or in a cap it secured therein. These dogs are interposed between the valve 3 and a pin 5 which extends coaxially of the valve, and preferably lie. within the confines of the valve. The pin 5 may be provided with an enlarged head 50, and this head is engageable by cam surfaces 45 on the dogs 4. The dogs are also provided with cam surfaces 43 which are engageahle with the outer end of the valve 3. The pin 5iis wholly independent of the dogs 4, whereby it maybe adjusted, and whereby parts may be easily removed'for inspection or repair..

The pin 5 is reciprocable relative to the till the pin so as to be adjustable thereon. ll

provide also a spring 52 which tends always to retainthe in 5 retracted within the socket 36 of the re 33.

As the piston 2 advances toward oneend, toward the right in Figure 1, its first action upon nearing the end of its stroke is to compress the valve-actuating spring 35. This pressure, transmitted to the outer end of the valve and acting upon the cam -surfaces as of the dog, tends to throw the dogs inward. The head 50, however, is in position to re strain the dogs. As the pistons advance continues, its hub 20 engages the'arms' 53 of the cross head. The pin 5 and cross head being secured together, the pin is moved axially outward, the rod 33 being held stationary and the spring 52 being comtill) pressed. When the head of the pin has hill pressure of the spring 35 transmitted through the valve 3, as noted above, the

latter acting upon the cam surface 43 of the dogs. This permits partial closure of the valve 3, and when the dogs have moved in the: rod 33. ,Preliminary partial closure of the valve decreases the distance to be travelled finally, and conse uently the time of closure, greatly increasing the meters accuracy at high speeds.

Reversal of the valve at the opposite end '.causes the subsequent movement inward 0t the pin 5 at this end, through the medium of the resilient connection of the cross head arms 53 and rod 33. When the valve is in its reversed position the dogs 4' will be thrown outward into valve-holding position and the head 50will be moved into position tolock the dogs thus. Upon reversal of the valves the piston reverses its direction ofmovement and the operation is repeated at the o posite end.

If it is desired toadjust the point of reversal of the valves this may be accomplished by removing a small plug 19 from the cap 16 and inserting a screw driver into a slot 51 in the end of the head 50. By turning the in 5 in one direction or the other the position of the cross head 53. is adjusted relative to the valve 3. This varies the position of the head 50 relative to the dogs 4 and thus controls the point of reversal of the piston 2 and the valves. What I claim as my invention is:

1. In a fluid meter including a cylinder, a piston reciprocable therein, and a control valve, the combination therewith of valve controlling means comprising dogs engageable withthe valve to hold it in exhaust position, a pin independent of an engageable with said dogs to lock them in valve-holding position, said pin being engageable by the piston as it advances to release said dogs, and means operable upon release of said dogs to reverse the valve.

2. In a fluid meter including a cylinder, 9. piston reciprocable therein, and a control valve, the combination therewith of valve controlling means comprising dogs, engageable with the valve to hold it in exhaust position, a pin independent of and engageable with said dogs to lock them in valveholding position, said pin being engageable by the piston as it advances to release said dogs, means operable upon release of said dogs to reverse the valve, the valve a d valve-controlling means being duplicated at the opposite end of the cylinder, the duplicate valves and valve-controlling means heing reversely positioned, and a tension member connecting the valves at opposite ends of the cylinder.

3. In a fluid meter including a cylinder, a piston reciprocable therein, and a control valve, the combination therewith of valve controlling means comprising dogs engage able with said valve to hold it in exhaust position, a pin having an enlarged head en gageable with said" dogs to throw them outward into valve-holding position and to lock them thus, said pin being movable by the piston in its advance to release .said dogs, and means operable upon release of said dogs to reverse the valve.

4. In a fluid meter including a cylinder, a piston reciprocable therein, and a control valve, the combination therewith of valve controlling means comprisin dogs on ageable'with said valve to hol it in ex aust position, pin having an enlarged head engageable with said dogs to throw them cute ward into valve-holding position and to lock them thus, said pin being movableaxially of the cylinder by the piston as it advances torelease said dogs, a spring compressible by the pistons advance and operable upon release of saiid dogs to reverse'the valve and said dogs.

5. In a fluid meter including a cylinder, a piston reciprocable therein, and a control valve at one end thereof, the combination therewith of valve controlling meanscomprising dogs en/gageable with the valve to hold it in exhaust position, a pin independ-.

ent of and engageable with said dogs to lock them in valve-holding position, a spring engaging said pinand tending to hold it in lockin position, said pin being. engageable by it e piston as it advances to release said dogs, and means operable upon release of said dogs to reverse the valve and valvecontrolling means, the .valve and valvecontrolling'means being duplicated at the opposite end of the cylinder, the duplicate members being reversely positioned, and a rod connecting the valves at opposite ends ofthe cylinder.

6. In combination in a fluid meter, a cylinder having axially alined inlet and exhaust ports at each end, a piston reciprocable insaid cylinder, a tubular valve for the ports at each end and reversible-in position, said valves at opposite ends being reversed in position, a rod to which both of said valves are secured, the ends of said rod having an axially-extending socket and a transversely-extending slot, and duplicate valve-operating and controlling mechanisms for each end of the cylinder, each corn rising dogs. engageable with the valve to old it in exhaust position, a pin projeetible from said'socket in the end of the rod and engageable with saiddogs to lock them in valve-holding position, a cross-head secured upon said pin and having arms projecting through said slot in the rod into the path the ports at each end and reversible in position, said valves at opposite ends being reversed in position, a rod to which both of said valves are secured, the ends ofsaid rod having an axially-extending socket and a transversely-extending slot, and duplicate valve-operating and controlling mechanisms for each end of the cylinder, each comprising dogs engageable with the valve to hold it in exhaust position, a pin projectable from said socket in the end of the rod and engageable with said dogs to lock them in valve-holding position, resilient means tending to retract the pin into its socket. a cross-head secured upon said pin and having arms projecting through said slot in the rod into the path of the piston to be engaged to release the dogs by the pistons advance, and means operable through the advance of the piston for reversing the positions of said valves and dogs.

8. In combination in a fluid meter, a cylinder having axially alined inlet and exhaust ports at each end, a piston reciprocable in said cylinder, a tubular valve for the ports at each end and reversible in position, said valves at opposite ends being reversed in position, a rod to which both of said valves are secured, the end of said rod having an axially-extending socket and a transversely-extending slot, and duplicate valve-operating and controlling mechanisms for-each-end of the cylinder, each comprising dogs engageable with the valve to hold it in from said socket in the} end of the rod and engageable with said dogs to lock them in valve-holding position, a cross-head secured upon said pin and having arms projecting through said slot in the rod into the path of the piston to be engaged to release the dogs by the pistons advance, a spring engaging said cross-head arms to retain the pin projected into its socket, and means -operable through the advance of the piston for reversing the positions of said valves and dogs. 7

'9. In a fluid meter including a cylinder,

haust position; a pin projectible a piston reciprocable therein, a contro valve at each end of the cylinder, and a rod-connecting the valves which are at opposite ends of the cylinder, valve controlling mechanism for each valve comprising a pin ieciprocable relative to said rod'and having ahead on its outer end, dogs interposed between said head and the valve and engageable with the valve to hold it in exhaust position, the head then engaging the dogs to lock them in valve-holding position, a cross-head adjustably secured upon the inner end of said pin, said cross-head being engageable by the piston as' it ad- ,vanres to thereby release said dogs, and

means operable upon release of the dogs to reverse the valve and valve controlling mechanism at each end of thecylinder.

10. In a fluid meter including a cylinder, a piston therein, a .fluid control'valve for each end of the cylinder and means connecting said valves to 'move together, the combination therewith of a spring compressi:

ble by the piston inits advance to close the valve, a dog engageable with the'valve by inclined surfaces to hold the valve open, and a dog locking member movable immediatelyiollowing actuation of the valve to engage the dog in valve-holding position and movable by the piston to release the 'dog.

1 1. In a cylinder and piston meter, a spring-actuated reciprocating valve, a valve holding dog, said dog and valve having inclined holding surfaces, and a dog-retaining member controlled in its position by movement of the meter piston.

12. In a meter including a cylinder and a piston therein, a reciprocating fluid controlling valve, a valve actuating spring between the valve and piston, a valve holding dog, said dog and valve having inclined engaging surfaces, and a dog retaining memberadapted to hold the dog in valve-o en position, and means for shifting said 0;: retaining member to release the dog. A

11:}. Ina meter including a cylinder and a piston therein, a reciprocating fluid controlling valve, a valve actuating spring be

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