US1462352A - Safety dispensing device - Google Patents

Description

July 17, 1923 a M. F. MILLOT SAFETY DISPENSING DEVICE Filed Sept. 1919 Patented July 117, HQZB.

names rnanoorfs MILLOT, or rants, manor.

SAFETY DISPENSING DEVICE.

Application filed September 5, 1919. Serial No. 321,954.

T 0 all whom it may. concern Be it known that MARIUS FRANQOIS MIL- Lor, of Paris, France, a citizen of the French Republic, has invented certain new and useful Improvements in Safety Dispensmg Devices,-of which the following is a specification.

The distribution of inflammable liquids such as benzine from storage receptacles by means of a compressed inert gas has been carried on for some years in various places particularly in large store-houses.

In all these installations the drawing ofi of the liquid is effected by sending into the reservoir in .which it is contained a compressed inert gas which exercises its pressure on the surface of the liquid and forces it out through a pipe that is immersed or dips into the interior of the reservoir. The consequence is that in case of fire, if the safety apparatus intended to destroy this pressure do not act or if the raising pipe breaks the whole body of liquid contained in the reservoir is difiused outside. Moreover even if the safety apparatus acts a considerable time is required for destroying the pressure of a quantity of gas which sometimes amounts to more than 2000 litres and during this time the inflammable liquid is continuously thrown into the zone of fire. The present invention is intended to obviate these serious difficulties by the carrying out of an arrangement in which the pressure of the inert gas is not exercised on the surface of the liquid in the reservoir but in a receptacle of small capacity immersed in this latter. Owing to this arrangement the pressure in the reservoir does not exceed the atmospheric pressure and in case of accident only the small quantity of liquid in the auxiliary receptacle escapes outside.

The accompanying drawing given by way of example illustrates one of the methods of carrying out this invention.

Fig. 1 is a section of the whole arrangement.

Figs. 2 and 3 are views of details.

The novel arrangement comprises a reservoir A preferably made of sheet iron in cylindrical or rectangular form the bottom of which is extended as a well P formed by a cylinder similar to the steam dome of a locomotive but inverted the top being underneath.

In the interior of the well P and im- B is furnished mersed in the liquid is a closed cylindrical receptacle B the capacity of which varies for example from 10 to 100 litres according to the quantities of liquid to be drawn off.

This receptacle rests on a support at the bottom of the well P. The liquid enters the receptacle B throu h one or two openings S each closed-by a a valve when the pres-.' sure of the liquid in the receptacle reaches a certain height.

Two pipes C, D, communicate with the receptacle B. The first pipe C which runs to the bottom of the receptacle serves for conveyin% the liquid into a measuring receptacle of the same capacity as the receptacle B. The second pipe D conveys the compressed gas into the receptacle B. To the pipe D a three way cock R is connected which enables the compressed gas to be conveyed from the container G into the receptacle B when it is turned into'the position indicated in Fig. 2 or the gas to be conveyed from the receptacle B to mg column 0 when it is put in the position indicated in Fig. 3 the effect of which is not only to stop the ascent of the liquid through the lowering of pressure produced in the rein the raising column C to descend again.

.Themeasuring receptacle E the capacity of which 1s equal to that of the receptacle eating tube which measures the quantity of liquid which it contains. A pipe F runs from the upper part of the measuring receptacle to the reservoir A with which it is connected through the medium of a wider pipe F. The pipe F serves for conveying into the reservoir A a part of the inert gas which replaces the liquid that is discharged. A. spring valve S placed on the pipe F and regulated so'as to open when the presthe top of the raiswith a graduated level indisure exceedsthe atmospheric pressure serves for discharging outside the gas that is in excess.

An ordinary pressure gauge M communicates on the one hand with the flask of compressed gas G and on the other hand with the cock R. A float Z the graduated rod of which extends in the interior of the pipe F completes the installation. A sight glass V enables the graduations' on the float rod to be read.

The filling of the reservoir is efiected through the pipe H which during the rest of the time is closed. During the filling the gas in the reservoir A escapes through the valve S unless it be desired to recover it by I receptacle E and running to the outside.

At the junction of the pipes C and D a valve S is provided for preventing the liquid from entering the pipe D in case by error the admission of the gas has been adjusted to too high a pressure. This error moreover would be without consequence since the liquid that had entered the pipe D would return to the reservoir when the cock R had returned to the position shown in Fig. 3.

The working of this arrangement is very simple as it is comprised in the opening and the closing of the cock R. i

The reservoir A having been filled the cock of the flask G is regulated for the admission of the gas to the pressure gauge at the pressure desired and the cock B being in the position of rest (Fig. 3) this cock R is turned a Quarter turn in order to bring. it into the position shown in Fig. 2. The gas then entering the pipe D exercises its pressure on the liquid in the receptacle B and causes it to enter the measuring receptacle E. When the level of the indicating tube indicates that the measuring receptacle contains the uantity of liquid to be delivered the cock is closed, that is to say is put into the position of repose as in Fig. 3. At this moment a lowering of pressurev occurs in the receptacle B and a compression at the top of the raising column 0. The liquid contained in that column then returns to the reservoir and the gas escapes through the pipe F.

The stopping of the ascent of the liquid is nearly instantaneous, because having regard l1 1,4ca,sea

to the small volume of gas employed the lowering f pressure in the receptacle B and the compression at the toppf the ascending 0015111111 takes place in less than half a secon The gas which has escaped throu h the pipe F and the valve S having broug t the gas in the receptacle B to atmospheric pressure a fresh quantity of liquid enters the receptacle B through the opening of the valve S and the operation may begin again as long as there is liquid in the reservoir A.

'When at rest, the empty part of the reservoir, all the pipes and the measuring receptacle are full of inert gas under atmospheric pressure so that all can be destroyed by the fire on the surface of the ground withaut the fire being able to spread to the reservoir, the liquid in which does not escape.

In case of the ascending column being broken during the drawing ofi and the person in charge forgetting at this moment to close the cock B only the small quantity of liquid in the receptacle B will escape.

I claim Apparatus for the storage and distribution of inflammable liquids comprising a main storage reservoir, an auxiliary receptacle supplied with liquid from said reservoir, a measuring vessel, a liquid raising column connecting the bottom part of the auxiliary receptacle with the bottom of the measuring vessel, a pipe connecting the top of the auxiliary receptacle with the top of the liquid raising column at a point above the measuring vessel, a three way cock in said pipe, and a flask containing an inert gas under pressure connected to said cock.

In testimony whereof he has afiixed his signature, in presence of a witness.

MARIUS FRANQOIS MILLOT. Witness: 1

CHAS. P. PnnssLY.

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