US1560439A - Retarding device - Google Patents

Description

Nov. 3, 1925.

A. D. TRENOR RETARDING DEVICE Original Filed Nov. 1, 1917 QLIfl ENTOR 01%; KO 14? atented ova 332$.

ALBERT D. TEENGR, 0F

NEW YORK, N. '21, ASSIGHOE TO JOHN HAYS HAMMOND, JB.,

0!? GLOUCETEE, SACHUSETTS ammonia Device.

Application filed Rhvember 1, 1917, Serial To all whom it may concern:

Be it known that I, Annnn'r D. TRENOR, a citizen of the United States, and a resident of the city of New York, in the count of New York and State of New York, ave invented certain new and useiul Improvements in Retarding Devices, of which the following is a specification.

Some of the objects of this invention are to provide an improved retarding device Where by an impulse of fluid under pressure when continued for a predetermined period of time will cause theoperation of a valve to permit a fluid to pass through a pipe and to continue to pass through the pipe for a predetermined period after the impulse of compressed fluid has been terminated; and to provide other improvements as will hereinafter appear.

The accompanying drawin is a longitudinal central section of a denying device constructed in accordance with this invention. Referring to the drawing, one embodiment of this invention comprises a valve including a stationary cylindrical valve casing 11 which is provided with two diametrically opposed ports, an inlet port 12 and an outlet port'13, and with an exhaust port 1% arranged in longitudinal alinement with the outlet port- 13'. Extending axially through. the casing 11 is a valve-stem 15 and loosely surrounding the valve-stem 15 and fitting; snugly but slidably in the valve casing 11 is piston valve 16 which is pro vided adiacent one end with an annular re ccss 17, adjacent its other end with a longitudinally extending recess 18 which is arranged to communicate with the corresponding port 13 when the valve 16 is in its innermost position as shown in the drawing. The valve 16 is held against rotation with respect to the valve casing 11 in any suitable manner, as for instance by means of a rectangular lug or key 19 projecting inwardly mom and rigidly secured to the casing ii and engaging snugly out slidahly in a he way 20 provided therefor in the valve 16 and extending-longitudinally there-- of. 1 d upor the valve-stein 15 and arr-am o sides of the valve i sleeves Z 28 pro ta o caps are arranged to the delaying cylinder No. 193,7 2? Renewed February 28, 1923.

and which are threaded into the opposite ends respectively of the valve casing 11. Between the inner ends of the two caps 29 and 30 and corresponding annular internal shoulders 31 and 32 provided therefor in the valve casing 11 are two packing rings 33 and 34.

Spaced from the valve-casing 11 and arranged coaxially ing cylinder 35 through which the valvestem 15 extends snugly but slidably. Surrounding and rigidly secured to the valvestem 15 is a delaying piston 36 which fits snugly but slidably in the delaying cylinder 35. The delaying cylinder 35 is provided at each end with two ports 37, 38. The two ports 37, 38 of one end of the cylinder communicate respectively through two pipes 39 and with the corresponding ports 37 and 38 of the other end of the cylinder. These two pipes 39 and 40 are controlled at one end of the cylinder 35 lo an outwardly closingcheck-valve and y a needle valve 46 respectively, and at the other endof the cylinder 35 these two pipes 39 and 10 are controlled by a needle valve i? and by an outwardly closing checkvalve 48 respectively. Spaced outside of 35 and surrounding and rigid with the valve-stem 15 is, collar 50, and surrounding the valve-stem 15 between the collar 50 and the corresponding end of the delaying cylinder 35 is a normally compressed spiral spring 51 which normally acts to hold the valve-stem 15 in such a position that the valve 16 carried thereby will he in the position shown in the drawing in which the inlet port 12 will be closed and the outlet port 13 will be in communication through the recess 18 with the exhaust port 14.

For moving the valve-stem 15 inwardly to ultimately move the valve 16 into sue a position that the inlet port 12 will be in communication with the outlet port 13 through the annular recess 17 of the valve iii, an actuating cylinder 55 is spaced bend the o1 ter end of the valve-stem 15 and position coaxial therewith manner. This actuating 'ovided at its outer end with h w compressed air or i may he admitted or may he exng atmosphere.

therewith is a fixed delay- Snugly but slidablyarranged in the actuating cylinder 55 is an actuating piston-60 which is rigidly secured to the inner end of a piston rod 61 which is arranged to reciprocate through the inner end of the cylinder 55. The outer end of this piston rod 61 is enlarged as at 62 and is provided with a cylindrical recess or socket 63 arranged to slidably receive the corresponding end of the valve-stem and to permit the outer end of the enlarged portion 62 of the piston rod 61 to engage against the outer annular surface of the collar which is rigid with the valve-stem 15. The actuating piston 60 is normally held in its innermost position by means of a normally action of the retarding piston 36.

compressed spiral spring 65 arranged within the actuating piston and surrounding the piston rod 61. In the operation of this improved delaying device, the parts are normally arranged as shown in the drawing, and when an impulse of com ressed air is permitted to pass inwardly t rough the port 56 of the actuating cylinder 55, .the piston will be gradually moved outwardly towards the valve casing against the action of the normally compressed spiral spring and against the action of the spiral spring 51 which surrounds the valvestem' 15, and also against the retarding If this impulse of compressed air is continued inwardly through the port 56 for a predetermined period, which may be varied by varying the pressure of the air or by varying the adjustment of the needle valve 46, the sleeve 26 carried by the stem 15 will be brou ht into engagement with the correspon ing end of the piston valve 16, and

if the impulse of compressed air is further continued for a sufficient predetermined period the piston valve 16 will be moved into its outermost or operative position in which the piston valve will be arranged so that its annular recess 17 is in alinement with and permits communication between v the inlet port 12 and the outlet port 13.

If now after the piston valve 16 has been moved into its outermost position as just described, the impulse of compressed air inwardly through the port 56 is discontinued and the air is permitted to pass outwardly from the actuating cylinder 55 through the port 56, the piston 60 together with the piston rod 61 will be immediately returned to their initial position under the action of the spring 65 and the valve-stem 15 wiii be permitted to be returned towards the norniai position under the action of the spirai spring by the retarding piston And after the valve-stem 15 has been mus moved through a pretermined distance or period towards its initial position, the time of which c: be regulated by the needle vaive 4?, i -eve 25 Wiii he in'ouglzt into ti -,6 Si

engagement With the outer end of the piston-valve 16, whereupon a continuous movement of the valve-stem 15 for a predetermined period will return the piston-valve 16 into its initial position as shown, in which communication will be closed between the inlet port 12 and the outlet port 13, and the latter will be opened to the exhaust port 14 through the recess 18, as shown in the drawing.

Although only a single form has been shown in which this invention may be embodied, it is to be understood that the invention is not limited in its application to any particular construction but might be embodied in various forms without departing from the spirit of the invention or the scope of the appended claims.

Having thus fully described this invention, I claim: 1

l. A control mechanism comprising a fixed valve casing provided with an inlet port and with "an outlet port, a. valve ar-' ranged to reciprocate in said casing to control said ports, a valve stem having a lost motion connection with said valve, meansineluding a. fluid actuated device. having a lost motion connection with said valve stem for moving said valve stem in one direction, and means to retard the movement of said valve stem in either direction.

2. A control mechanism comprising a fixed valve casing provided with an inlet port and with an outlet port, a valve arranged to reciprocate in said casing to control said ports, a valve stem having a lost motion connection with said valve, means including a fluid actuated device having a lost motion con iection with said valve stem for moving said valve stem in one direction, and retarding means variable at will to control the movement of said valve stem in either dimotion.

3. A control mechanism com rising a valve casing provided with an inlet port and with an outlet port, a. valve arranged to reciprocate in such casing to control said ports, a valve stem having a lost motion connection with said valve for reciprocating said valve and means including a fluid actuated device having a lost motion con nection with said valve stem for moving said valve stem in one direction.

4. A control mechanism comprising a fixed valve casing provided with an inlet port and with an outlet port, valve arranged to reciprocate insaid casing to control said ports, a valve stem having a lost motion connection with said valve for reciprocating said valve, and means including a cylinder and a piston siidable in said cylinder, said piston having a lost motionconnection with said valve stem for moving said valve stem in one direction.

5. A control mechanism comprising a iii) valve casing provided with an inlet port and with an outlet" port, a valve movable in said casing to control said ports, means having a lost, motion connection with said valve for actuatin said valve ineither of two directions, an means including a fluid actuated device having a lost motion connection with said first mentioned means for moving said first mentioned means in one of said directions.

6. A control mechanism comprising a valve casing provided with an inlet port and with an outlet port, a valve arranged to reciprocate in said casing for controlling said ports, a. reciprocatory valve stem having a lost motion connection with said valve for reciprocating said valve and means including a fluid actuated device having a lost motion connection with said valve stem for moving said valve stem in one direction.

7. A a control mechanism comprising a valve casing provided with an inlet port and an outlet port, a valve cooperating with both of said ports and arranged to reciprocate in said casing to control said ports, a reciprocatory valve stem having a lost motion connection with said valve for reciprocating same, means whereby said valve stem may be moved in one direction said means having a lost motion connection with said valve stem, and means fixed upon said valve stem for retarding the movement of the same.

8. A control mechanism comprising a valve casing provided with an inlet port and an outlet port, a valve cooperating with both of said ports and arranged to reciprocate in said casing to control said ports, a reciprocatory valve stem having a lost motion connection with said valve for reciprocating same, means whereby said valve stem may be moved in one direction said means having a lost motion connection with said valve stem, and means fixed upon said valve stem for retarding the movement of the same in either direction 9. A control mechanism comprising a valve casing, provided with an inlet port, an outlet port, and an exhaust port, a valve arranged to reciprocate in said casing to control said ports, said valve being so constructed that when it is in one position it will cause said inlet port to communicate with said outlet port and so that when in another position it will prevent comn'iunication between said inlet port and said outlet port and will cause said outlet port to com municate with said exhaust port, and means to retard the movement of said valve in either direction.

10. A control mechanism comprising a. valve casing, provided with an inlet port, an outlet port and an exhaust port, and a valve arranged to reciprocate in said casing to control said ports, said valve being so constructed that when it is in one position it will cause said inlet port to communicate with said outlet port and so that when in another position it will prevent communication between said inlet port and said outlet port and will cause said outlet port to communicate with said exhaust port, a valve stem having a lost motion connection with said valve for reciprocating said valve,means having a lost motion connection with said valve stem for moving said valve stem in one direction, and means to retard the movement of said valve stem in either direction.

11. A control mechanism comprising a valve casing provided with an inlet port, an outlet port, and an exhaust port, a valve arrangedtoieciprocate in said casing to control said ports, said valve being provided with passages whereby when said valve is in one position said inlet port will be in communication with said outlet port, and there will be no communication through said valve between said exhaust port and said outlet port, or said inlet port, but when said valve is in another position communication will be closed between said inlet port and said outlet port but will be established through said valve between said outlet port and said exhaust port, a valve stem extending loosely through said valve, two stops arranged upon said valve stem upon 0 posite sides respectively of said valve an an ranged to permit of a limited longitudinal movement of said valve stem with respect to said'valve, means having limited movement with respect to said valve stem for moving said valve stem in one direction, and means to retard the movement of said valve stem in either direction.

12. A control mechanism comprising a valve casing provided with an inlet port, an outlet port and an exhaust port, a valve arranged to reciprocate in said casing to control said ports, said valve being provided with passages whereby when said valve is in one position said inlet port will be in communication with said outlet port, and there will be no communication through said valve between said exhaust port and said outlet port, or said inlet r'port, but when said valve is in another position communication will be closed between said inlet )ort and said'outlet ort but will he established through said va ve between said outlet port and said exhaust ort, a valve stem extending loosely throug said valve, two stops arranged upon said valve stem upon op msite sides respectively of said valve and arranged to permit of a limited longitudinal moven'ient of said valve stem with respect to said valve, means including an element carried by said valve stem for retarding the movement of said valve stem, and means having limited movement with respect to said valve stem for moving said valve stem in one direction, and yielding means operatively connected with said valve stems for moving the same in an opposite direction.

13. A control mechanism comprising a valve casing, a valve arranged to recipro cate in said casing a valve stem extending loose] through said valve, -two stops carried y said stem upon opposite sides of said valve respectively and arranged to permit of a limited longitudinal movement of said stem with respect to said valve, a piston carried by said stem, a fixed cylinder through which said stem is arranged to reciprocate, a pair of pipes providing communication between the opposite ends of said cylinder, said pipes being provided with suitable valves, some of which are adjustable so as to cause the retardation of said piston in either direction, means operative 1y connected to said stem and having a limited movement with respect thereto for moving said stem in one direction, and yielding means operatively connected to said stem for moving the same in an opposite direction.

14. A control mechanism comprising a valve casing, a valve arranged to reciprocate in said casing, a valve stem having a lost motion connection with said valve for reciprocating the same, power means for moving said valve stem in one direction said means having a lost motion connection with said stem, yielding means for moving said stem in an opposite direction and means for retarding the movement of said stem in said opposite direction.

Signed at New York, i' the county of New York and State of New York this.

29th day of October A D. 1917.

ALBERT D. TRENOR.

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