US2397677A

US2397677A - Liquid feeding device

Info

Publication number: US2397677A
Application number: US498218A
Authority: US
Inventors: Lee J Macglashan
Original assignee: E C MACGLASHAN
Current assignee: E C MACGLASHAN
Priority date: 1943-08-11
Filing date: 1943-08-11
Publication date: 1946-04-02
Anticipated expiration: 1963-04-02

Description

April 2, 1946. L J MaCGLASHAN 2,397,677

LIQUID FEEDING DEVICE.

Filed Aug. 11:, 1943 INVENTOR. lee J /%c' /ag'a/z Patented Apr. 2, 1946 LIQUID FEEDING DEVICE Lee J. MacGlashan, Long Beach. Calii., assignor to E. C. MacGlashan, North Hollywood, Calif.

Application August 11, 1943, Serial No. 498,218

3 Claims.

- This invention relates to apparatus for feeding quantities of a liquid into a receptacle, and while features of the invention may be employed in other situations, in the present specification, the invention isdescribed as applied to a toilet bowl for feeding a disinfectant or deodorizer into the toilet bowl in small quantities.

Many devices have been employed for this general purpose, but most of them operate by providing a continuous drip of the deodorizer into the bowl. This involves a waste of the deodorizer where th'e bowl is not in constant use, and usually results in the odor of the disinfectant being so strong as to be very disagreeable.

Some such devices have been connected to the flushing apparatus so as to be operated automatically when the bowl is flushed, but this results in introducing the deodorizer into the bowl while the flushing operation is continuing, which of course tends to defeat the primary purpose of introducingthe deodorizer, because most of the deodorizer passes down the soil pipe with the flush water.

One of the objects of this invention is to provide apparatus of simple construction which'is controlled through the agency of the static pressure existing in a supply duct or pipe. In other words, my object is to utilize variations in staticpressure to eifect the feeding of a quantity-of liquid into a receptacle which in the present instance is a toilet bowl; the drop in static pressure that occurs during the flushing operation bringing about the feeding movement of the deodorizer or disinfectant afterthe flushing operation ceases. I Another object of the invention is to provide simple apparatus that is particularlyadapted for attachment to an ordinary toilet bowland water supply-pipe or duct in which the fius water normally stands under the usual pressure that is maintained in water service lines. 4 ""Another object of the invention is to provide a reservoir for thedeodorizer connected up as a source'of supply to the apparatus, together with means for indicating the amount of deodorizer in the reservoir.

Further objects of the invention will appear from the following specification and drawing illustrating an adaptation of the invention, by way of example, to the specific purpose of deodorizing a toilet bowl.

In the drawing:

Fig. 1 is a side elevation illustrating apparatus embodying this invention connected up to a toilet bowl and its water supply pipe;

Fig. 2 is a vertical central section through the apparatus ,upon alarger scale, but this section is represented as though viewed from the rear side of the parts as shown in Fig; 1, a portionof'the indicatlng'rod being broken away; I v

Fig. 3 is a horizontal section through the reservoir taken on the line 33 of Fig. 2'; and

'Fig. 4 is ,a vertical section on the line 4-4 of Fig. 2. 7 v v In practicing the invention when applied to a toilet bowl for example, I provide a movablepressure responsive part such as a diaphragm I which is mounted in the apparatus in such a way that one side of this member is subjected to the pressure in the duct or water supply pipe 2 that conducts the flush water to the toilet bowl 3.

As shown, this pipe 2 is connected to a flush valve 4 having a handle (not illustrated) for operating it. When this valve is opened, the flush water which is under the usual pressure existing in water service lines, flows past the valve and through the flushing inlet 5 into the bowl.

In the present instance, the space on one side of the diaphragm l is maintained under the static pressure of pipe- 2 by means of a pipe connection 6 (see Fig. 1). The diaphragm I is associated with a chamber 1 within a casing 8 which contains deodorizing liquid. I

When the bowl. isbeing flushed, the water in the pipe 2 flows past the connection 6 and a reduced's'tatic pressure immediately resultsso that the diaphragm 1 moves outwardly or toward the right. as viewed in Fig. 2. This, of course, increases the effective capacity of the chamber 1, and more deodorizer liquid flows into it as will be presently described. I

As soon as the flushing operation ceases, the service pressure inthe pipes 2 and 6 is established again and the diaphragm is moved back by this static pressure to itsnormal positionshown in Fig. 2. This cycle of movement of the diaphragm effects-the feeding of a quantity of the deodorizer into the bowl 3 through a pipe connection 9 that leads out of the chamber I over into the flushing inlet 5. The pipe 9 is connected to the chamber 1 by a fitting H] of trap type having a check valve I I that prevents any back-flow into the chamber 1 from the flush pipe 5.

The chamber 1 is preferably provided with means for adjusting the amount of possible movement of the diaphragm l and for this purpose, I

provide a long bolt having a stem l2 with a threaded shank i3 threaded into a tapped opening in the rear head l4, and held fixed in position by means of a check-nut 15.

This stem carries a movable head It with a occurs; a

ter flows up the pipe 2' to the bowl and the static,

g Le V bore I! that fits the diameter of the stem. The bottom of this bore I1 seats against the end of the stem to limit the movement of the diaphragml Thehead I6 may have a concave face I8 to take the thrust of the diaphragm and if desired this face may be secured in any desired manner to the diaphragm. 7 V

When the static pressure falls during the flushing and th diaphragm I movesvv toward the right. (see Fig, 2) a quantity of the deodorizing liquid may be fed into chamber, 1 from a reservoir I9f While the'forms of my invention herein disclosed in detail are now deemed the preferred embodiments thereof, it is to be understood that they are merely illustrative of the broad scope that may be employed if desired to insure a plenti 3 ful supply of the deodorizer, This reservoir has an outlet neck that may be threaded into'a fitting 2I secured to the upper side of th casing;

8 and provided with a check valve 22. that. pres,

' normal positionafter a flushing operation has occurred." V V If desired, the reservoir I9 may be providedwith a removable cap 24 having a,guideopeningfor a graduated stem 25 that is carried by afloat 26. The side of this stem has a scale 21 the readings on which'at the upper face of the cap will indicate approximately how much deodorizer is left in' the reservoir.

A removable screwcap 28 clamps the edge of the diaphragm; I tothe end of the cylinder 8, and a check valve 30 is preferably placedin the supply lin ahead of the pipe 6 to isolate the device from pressure variations in the linefrom causes other than the flushing operation;

The mode of operation will now be briefiy'restated. V

- As long as the static pressure in the duct or pipe 2 'i jmaintained, no. feedv of the deodorizer Whenthe flush valve 4 is operated, wa-

pressure at the side of the diaphragm I" becomes reduced, whereupon the diaphragm I moves" outwardlyin response to the. urging of spring 23; thereby increasing the capacity of the chamber 1 at the left side of the diaphragm as shown in Fig;

odorizer from this pipe 9, into the. flushing inlet 5. V

of my invention defined by the appended claims.

I claim: 1

1. In a system for supplying flushing water to a toilet bowl through a flush-valve controlled pressure line wherein the pressure varies in response to opening and; cl'osing-ofifthej; flush-valve, means for supplying a predetermined charge of liquid chemical to the bowl only immediately after each closure of the flush-valve, comprising adispenser adapted to be maintained filled with the chemicahsaid dispenser being adapted to communicate with the bowl, pressure-responsive means defining with the walls of the dispenser the'capacity thereofand operablein response to closure. of the flush-valve to reduce the capacity of the dispenser whereby to force chemical therefrom: into the boWLand means operable only upon opening of the flush-valve to increase theica-pacity V of thereceptacle andto' refill the samevwith liquid chemical;

2. lna system for supplying flushing: water to a" prising a chemicalreservoir, a. chemical dispenser,

aconduit providing. gravity flow of chemical from v the reservoir to the dispenser, a check valve controlling said conduit and seating towards the reservoir, a second-conduit adapted forprov-iding communication from ,the dispenser to the bowl; a diaphragm providing one of the walls of thedispenser and defining with the remaining walls thereof the capacity of the dispenser, said diaphragm being flexible outwardly to increase the cubic'capacity of the dispenser whereby to permit gravity flow of enough chemical from thereservoir past thecheck valve tothe dispenser to ill-l the latter; and being flexible inwardly to-displ'ace chemical in the dispenser to the extent'of said increased capacity; means adapted to provide constant-communication between the lineat a pointahead of the fiush valve and the outer face" of the diaphragm, said diaphragmbeing adapted to-flex inwardly in response; to pressure resulting from closureof the flush-valve, stop means f orli'miting theihwardffiexure of'thedi'adisposed in the dispenser. in positionltobe abutted c by the diaphragm and wherein the spri'ngfmeans is disposed"axially about therodi V V V