US1401642A - Supply-cock for the delivery of measured quantities of liquid - Google Patents

Description

A?PLICATION FILED JUNE 7| 1918.

ETIENNE RAVAZ AND AIEVI PILLON, 0F O'ULLINS, FRANCE.

moneta.

Application led June 7,

To aZZ lwhom t may concern.'

Be it known that we, ETIENNE RAvaZ and AIM PILLoN, French citizens, bot-h oi' Oullins, Rhone, France, have invented certain new and useful improvements in Supply- Cocks for the Delivery of Measured Quantities of Liquid, of which the following is a specication.

This 'invention relates to improvements in supply cocks for the delivery ot' measured quantities of liquid.

The supply cock which forms the object of the invention comprises simple and strong members incapable of irregular action or wedging, and is of sure working and easy control, giving at will either the maximum supply for which it has been regulated, or lesser supplies of variable volumes. In both cases'it is turned off automatically as soon as the desired supply has been attained and a fresh supply, like the former or different, can only be obtained after a further adjustment of the controlling member.

The annexed drawing illustrates a water distribution cockas an example ot' construction of the invention. Figure l is a longitudinal section through the axis, the movable members having been pushed tothe extreme position necessary for obtaining the maximum supply; Figs. 2 and 3 are cross sections through lines A A and B B of Fig. 1. Fig. 4 is a longitudinal section in which the movable piston is illustrated toward the end of its stroke in the working for maximum supply. F 5 is a partV longitudinal section showing the control ofthe piston by the rotation of the handle and Adriving rod for the minimum supplies. Fig. 6 is a front view of the handle or driving button'.

The body of the cock is composed of a cylinder 1 closed at one end by a heading 11 including the tube 2 screwed on the water supply pipe 3, this cylinder has a side channel 4 of suitable section intended to convey the water into the said cylinder near the Jforward end of the latter and in front of the piston. The forward end of the cylinder is closed by a screw threaded stopper 5 including the delivery tube 6 and having at its center a chamber inclosing a drum 7 held in position by two packings 8, preferably of leather. This drum 7 is formed of two washers connected by a cylindrical cross-piece provided with one or more holes 9, Fig. 2; this member is so placed that this hole or Specification of Letters Patent. Patnted D96, 27, 1921 1918. Serial N0.'238,715.

these holes are diametrically opposite to the entrance of the outlet channel 61.

,The stopper 5 is screwed on the body 1 with the interposition of a packing 10 and a metal disk 12 which has in its center a cylindrical projection 13, theedge of which is obllquely cut to form a circular double inoline. Y

The stopper 5, the drum 7 and the disk 12 form the guide for a sliding tube 14 serving to actuate the piston 15 inserted in 'the' cylinder 1; This tube is of determined length and it is provided, 'at its end which projects outside the cock, with a heart-shaped working button '16, Fig'. 6. The opposite end of the said vtube is screw-threaded toreceive a ring comprising a projection which forms a contact member 17, the length of which is suiiiclent to allowits uttermost part to slide on the incline 13 when a rotatory movement is given to the tube 14. This ring secures a rubber washer 25 between it and the base of the screw-threaded part. The tube 14 is providedl with 'a circle of holes 18 at a determined spot, so arranged that these holes come within the middle of the drum 7 when the tube 14 is completely pulled out and the contact member 17 rests on the base ot the incline as shown in Fig. 4.

The piston is' formed of a metal disk 15 comprising a hot pressed leather member'19 held tightly by a washer 20, the disk 15 has a central boss 21 serving as an abutment against the 'heading of the cylinder 1 when the piston is completely pushed back, Fig. 1; this projection also serves to center a spiral cone-shaped spring 22 inserted between the piston and the heading 11.

In the center of the piston is screwed a rod, 23 with an intermediate piece in the formV of a leather or rubber rundle 24 serving as a closing-valve for the inner chamber of the sliding tube 14. The diameter of this rod 23 is much less than the inner diameter ofthe tube 14 in order to leave between this rod and the tube an annular space intended for the passage of the water. The rectilinear guiding of the said rod 23 is secured by a head 26'termina'ting the free end of this rod and of'such diameterthat it can slide very freely along the tube 14, while still leaving passage for the water during the course of the said rod. The rear end of this rod 23 is truncated cone-shaped for a determined length, for the purpose of gradually narrowing the annular passage for the water between it and the tube 14, when the said rod reaches the bottom of its course as illustrated in Fig. 4.

A channel of small diameter 27 passes completely through the piston 15 and serves as a means of communication between the compartments on both sides of the piston.

rlhe working of the cock-system described and illustrated is as follows:

When the parts are at rest the sliding tube 14 is in the position illustrated Fig. 4 and the contact member 17 rests on the base of the double incline 13 the piston is in the position shown in dotted lines in Fig. 4. The tension of the spring 22 holds the valveseat 24 resting against the rear end of the tube 14 and consequently closes the entrance of the annular chamber formed by the space between the inner wall of the said tube 14 and the surface of the rod 23. On the other hand, the washer 25 is applied against the disk 12 and forms a joint preventing any escape of water which might be produced if the packings 8 or the tube 14 were loose.

The parts being in this position of rest, the water entering through the tube 2 and passing along the channel 4 passes though the orifice 41 into the free space in front of the piston between it and the disk 12, but this water cannot flow out as the entrance of the tube 14 is stopped by the valve-seat 24. At this moment, if the palm of the hand is pressed on the button 16 and the tube 14 pushed inward to the bottom, the piston 15 is pressed back against the heading 11 while fully compressing the spring 22, the spirals of which fit one within another, only forming an unimportant thickness, as is shown in Fig. 1, where the piston abuts by its seat 21 against the heading 11. During this stroke of the piston the compartment between its front surface and the disk 12 is enlarged and is gradually filled withv water which also penetrates inside the tube 14 -by passing through the holes 18. 1f the handle 16 is then let go, the pressure of the water which acts on the heading of the tube 14 formed by the surface of the handle 16 forces this tube to return forward to the position shown in Fig. 4. This pressure of the water` on the other hand, compels the pis ton to remain iattened against the heading 11.

The tube 14'having taken the position in Fig. 4, the water which it contains can pass through the holes 18 into the annular space 11 formed by the inside of the drum 7, then it passes through the holes 9 of the partition wall of the latter and through the annular chamber 111 outside the said partition wall and passes out through the tube 6.

While flowing, the water which i'ills the body of the cock passes through the channel 27 of the piston and into the space existing between the rear surface of this piston. and

monete the heading 11, thus establishing a like pressure on both surfaces of the piston. r1`he pressure of thespring 22 can therefore act on the rear surface of this piston and push the latter gradually back until the valve seat 24 reaches the rear end of the tube 14 and stops the entrance to the latter, thus interrupting the iiow of the water.

The duration of this liow is equal to the time which the piston takes to pass over the length of the cylinder 1, this time is the resultant of the force of the spring 22 on the one hand and the diameter given to the small communication channel 27 on the other hand, this channel allowing the filling of the back chamber and consequently the closing` stroke of the piston under the action of the spring 22.` Thus with the same .apparatus variable supplies can be obtained by gaging the channel 27 differently and by employing springs of different strength.

The fiow of water can be interrupted, if desired, it being suiiicient to give thetube 14 a iotatory movement on its axis, which will cause thecontact member 17 to ascend on the incline 13 which will cause the tube 14- to slide from front to back and the movement of this tube being sufiicient for the circle of holes 13 to leave the annular space 11 and come within the rear packing 8, it is understood that the water can no longer escape. The piston will however continue its course under the action of the spring 22 until its valve seat 24 abuts against the end of thetube 14 as shown in Fig. 5. The flow will be restored by bringing the tube 14 back to its former position, the piston will be again pushed by the spring 22 and automatic closing will ensue when the said piston reaches the end of its course.

The incline 13 will also allow of obtaining a very limited supply and an automatic closing when this supply hasI been obtained. lt has been explained that the rotation of the tube 14 on its axis when it is in the position shown in Fig. 4 causes the contact member 17 to ascend the incline 13 and the tube 14 to be pushed forward. 1t is understeod that the course of the latter will depend on the fraction of a revolution for which it will be moved and that, consequently, the piston will be moved to a corresponding extent while equally compressing the spring 22. If the tube is then brought back to its original position the water will flow away during the time taken by the pis ton to return to the position of stoppage of the sliding tube 14.

Fig. 5 shows the position of the contact member 17 at the top of the incline 13 and the consequent position of the piston, which will only have a little way to go in order to stop thel tube 14. This distance will be reduced in proportion as the rotation of the tube is decreased. Of course the said tube must always be restored to its former position in order to cause the water to flow. The incline 13 being circular the top thereof will be reached by the contact 17 after half a revolution of the tube 114C in one or the other direction immaterially.

After the closing of the cock has taken place automatically as has been described, a fresh flow of water is obtained by again pushingthe piston by means of the controlling button. The water which is in the compartment behind the piston would prevent the latter from moving if the hot-pressed leather member 19 did not leave slight play between its circumference and the inner surface of the cylinder, which play is sufficient for the water filling the said back compartment to pass gradually. into the front compartment.

In larOe supply cocks, such as a waterpost for instance, no play will be left between the leather member 19 and the cylinder, but the piston will be provided with packing rings in order to secure absolute water-tightness, the said piston will also be provided with an opening and will include an automatic valve arranged to open at the forward movement of the piston under the pressure of admitted water and to close at the return of' the said piston.

The operation button 16 has been made heartshaped in order that it may include a point intended, when it is turned downward (position in full lines), to indicate that the contact member 17 is at the base of the incline, while when it is turned upward (position in dotted lines) it indicates that the contact member is at the top of' this incline. In the intermediate positions it also shows the corresponding positions of the contact member, as the button is so adjusted on the tube that its point coincidegl with that of the contact member 17. This point can serve as a pointer moving over a graduated index on the front surface of the coclr which will allow of always obtaining a determined volume of liquid by setting the pointer on the required mark.

The arrangement of the part 7 protects the rod 23 of the piston from any tendency to wedging which might fix the piston in a position allowing a continuous outflow of water. This device, in fact, prevents any attempt to reach the said rod by means of any instrument. Hence any fraud is impossible further the stopper 5 being sealed after regulating` the apparatus any opening or attempt to open would be revealed by the breaking or deterioration of the seal.

The dimensions of the apparatus depend on the results to be obtained for example, for a like diameter or" the cylinder 1 and the same dimensions of the inlet and outlet orices for liquid, the length of the said cylinder can be decreased or enlarged and the slope of the incline can be reduced 'or increased, which would give a decrease orl a notable increase of the supply, by combining the dimensions of the members with suitable gaging of the admission and outlet of the water and the communication chanf nel 27, together with the force of the spring 22, the supplies can be varied within wide limits. y i

The admission of the liquid to the body of the coclr can talre place otherwise than through the channel 4L shown only as an `example.

The device is suitable for the distribution of all liquids. It can be used, for instance, for the measurement and distribution of pharmaceutic liquid products, perfumery and the like, into vials, bottles and receptacles of all shapes and capacities, which will always receive the exact amount of liquid which they are to contain. The device could be automatically operated, for instance the front of the device can be provided with a screw-abutment device, sliding or otherwise, which will allow an exact and variable regulation within wide limits of the course of the sliding tube 14 and consequently of the piston so as to obtain any supply between a given minimum and maximum.

What we claim as our invention and desire to secure by Letters Patent of the United States is l. A device for delivering measured quantities of liquid comprising a body, a heading` fixed at one end of said body, a stopper comprising a chamber at the other end of said body, an extension on said stopper in communication with said chamber, and forming an outlet for the liquid, a tubular extension from said chamber coaxial with said body and forming a guide, a slidable and rotatable hollow rod extending through said guide into said body, said rod having a series of circumferentially arranged orifices adapted to communicate with said chamber when the rod is in a certain position, a pis ton provided with a transverse channel within said body,k a piston rod extending from said piston into said hollow rod, means for guiding said piston rod in said hollow rod, a valve seat on said piston coacting with the inner end of said hollow rod, a spiral spring between the rear face of said piston and said heading, a'conduit for supplying liquid. to said body in front of said piston, a cylindrical member having an inclined surface on saidstopper and projecting into said body, and a laterally projecting member at one extremity of said hollow rod adapted to slide over said inclined surface when said rod is pulled out and rotated.

2. A device for delivering measured quanxed at one end of said body, a stopper comprising a chamber at'the other end of seid body, en extension on said stopper in corninunication with seid chamber, end forming an loutlet for the liquid, a perforated drum in said chamber, packings holding seid drum in position in said chamber, a, tubular eXtension from seid chamber coaxial with seid body and forming e guide, :i slideble and rotatable hollow rod extending through said guide into seid body, seid rod lhaving a, series of circmnferentially arranged orifices adapted to communicate ywith seid chamber when the rod is in e certain position, means for sliding and rotating seid rod, a piston provided with a Vtransverse channel within Seid body, a piston rod extending from seid piston into said hollow rod,`Ineens for guiding yseid piston rod in said hollow rod, a Valve seat on seid piston coacting with the leone@ inner end of seidhollow rod, a spiral spring between the rear fece of seid piston and said heading, a conduit for supplying liquid to seid body in fronto'l* said piston, :i cylindrical member having` en inclined surface on said stopper and projecting into seid body and e laterally projecting member et 'one extremity ol' said hollow rod adapted to slide over said inclined sur-fece when seid rod is pulled out and rotated.

In witness whereof we have signed this specification in the presence of two wit` nesses.

ETIENNE RAVAZ.

AM' PLLON.

Vlitnesses GASTON GnAUilrAUX, GRADY CoRBrrT.

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