US2012605A

US2012605A - Air compressor

Info

Publication number: US2012605A
Application number: US689839A
Authority: US
Inventors: William U Griffiths
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-09-18
Filing date: 1933-09-18
Publication date: 1935-08-27
Anticipated expiration: 1952-08-27

Description

Allg. 27, W' U GRlFFlTHS I AIR COMPRESSOR Filed Sept. 18, 1955 2 Sheets-Sheet l Jui@ (m6 M2M/n 7 Qt/Jam@ WMM @www Patented Aug. 27, 1935 i UNITED STATES PATPJISJTv OFFICE. i;

Am COMPRESSOR l William U. Grilths, Philadelphia, Pa. Application september 1s, 1933, serial No. 689,839

Y 'z claims. (o1. 23o-91) greater capacity than the water inlet is provided -with a float actuated discharge valve arranged to be opened by the float when the water reaches the desired level in the container, and the air pressure therein isk relieved. The container is provided with a valve controlled air intake and a valve controlled air outlet through which air is expelled as the container lls with Water. In

such'apparatus the air intake is ordinarily pro-Y vided with a iioat' actuated valve, the oat being so arrangedas to open the valve when the water reaches the desired height in the container. In order that the valve controlling the air intake may not close during the period of water dis.- charge from the container, it is essential that some means be provided for holding the air intake valve in its open position during the time that the water discharge valve is open.

One of the principal objects ofthe present invention is the provision of improved means for ysimultaneously holding the water discharge valve and the air intake valve in open positions. A further object of the invention is the provision of improved oat actuated means forretaining the water discharge valve in open position. -A

still further objectof the invention is the provision of improved iioat actuated means for hold- .ing the air intake valve in open position during the period of water vdischarge fromthe container. Still further objects and advantages of the improvement will be apparent from the following description, taken with the accompanyingdrawings, wherein: Y

Fig. 1 is a vertical sectional view of airpumping and compressing apparatus embodying one .form o'f'myimprovement and showing the posi- An air outlet 20 in the upper end of thecon- Itainer is controlled by a combined float and check Fig. 3 isja detailed sectional view showing the water discharge valve in open position;

Fig. l is a vertical sectional view similar to Fig. l but showing a modified form of water discharge valve and float operated means for re- 5 taining' the water discharge valve and the air intake valve in open positions; y

Fig. 5 is a detailed sectional view showingthe closed position of the modified form of water discharge valve illustrated in'Fig. 4; and 1 10 Fig. 6 is a plan View of the water discharge -valve shown in Figs. 4 and 5.

As I have illustrated the `same herein, `my improvement is embodied in a container yI 0 having a water inlet Ii preferably located in the bottom 15 portion thereof and so arranged as to provide a continuous flow ofV water under pressure. -The bottom of the container is provided with a'suitable nipple I2 forming a water outlet having a greater capacity than"v the water inletinjorder 2O that Ywater maybe'discharged when the outlet is opennotwithstanding the continuous flow of water intothe container. -The water voutlet I 2 is provided with a discharge valve I3 having an elongated valve stem or actuating rod I4 Vex- 25 tending there-below through a guide I5Y supported by spider arms I6 extending inwardly from the Water outlet I2. The valvestem I4 exiktends vertically within the container VIii and has its upper end freely slidable in a guide member 30 Il projecting inwardly from the container wall.V l A main float I8 for opening the Water discharge valve I 3 is slidably mounted upon the valve actuating rod I 4 between two spaced stop members,

such as Cotter pins I9. 5

Valve 2 I vwhich cooperates with the valve' seat 22 toprevent the backward flow of air from the air `storage tank through the air outlet`

pipe

23, and ,40

.provided with'an air intake 25 extending through the side wallthereof and connected to any suitable'source of clean, freshair The inner end of the air intake 25 is bent upwardly and is controlled by a pressure relief and air intake valve 25 secured to a valve actuating lever 21, one end 50 of which is pivoted to a bracket S28 extending outwardly from the air intake pipe, and the opposite end vof which carries'a'float 29 Whichserves to open theair intake valve when the water reaches the necessary height inthe container. rAs 5-5 shown herein, the upper end of the valveactuatf notwithstanding the lowering of the water level in the container, and consequently the air intake valve 26 will be held in open position when the actuated rod I4 is in elevated position. To insure the closing of the. air intake valve when the actuating rod I4 moves downwardly, it is preferable that the plate 3D be out of contact with the oat 29 when the actuating rod is in its lowermost positon, as shown in Fig. 1.

In order to retain the watei` dischargevalve I3 in open position and also retain the air intake valve 26 in open position during the periodof disi charge of water from the container, a latch 3 I Y is pivoted at its lower end upon a bracket 32 extending outwardly from the water outlet I2, and this latch is -provided intermediate its length with 'arshoulder 33 for engagement beneath an extended portion 34- on the edge of the water discharge valve between two oppositely arranged guide Vmembers 35, as shownV in Fig. 3. The extreme upper end of the latch 3 I is provided with a transversely-bent portion 36 which serves to prevent undue movement of the water discharge valve in anupward direction. vSecured to the latch'3I` isa fioat 3'I which tends to force the latch inwardly towardthe water discharge valve whereby theinclined portion 38 thereof tends'` to Vhold the discharge valve'closed during ythat portion of the cycle of operation of Vthe device when air is being expelled therefrom into the storage tank. l As the level of the Water'lowers to the bottom of the container during the period'of water discharge the latch float 3l is permitted to drop, thereby disengaging the shoulder 33 of the latch from beneath the water discharge valve and permitting this valve to move into its closed position.

As will be clear Vfrom Fig. v1 of the drawings,

vwhenthe water discharge valve is in its open position and is retained therein by the float actuated latch 3|, the elongated valve stem I4 is likewise held in its raised positon with the plate 30 thereon in engagement with the upper float 2o to thereby hold the air intake valve 25 in open position. vThe latch float therefore serves the purpose of retaining boththe water discharge-valve I3 and the air intake valve 25 in their open positions during. that portion of the cycle of operation ofthe apparatuswhen water is being discharged therefrom. Y

In the modified form of'apparatus shown in Figs. 4, 5, and 6, the waterldischarge valve 39 is pivotally mounted intermediate the ends ofa lever 40 one end of whichl is pivoted to a bracket 4I extending outwardly from the water outlet I2.

The opposite end of the lever 40 has pivoted'theretothe lower end of an elongated valve actuating rod 42 upon which the main float I8 is slidably mounted.

` In this modification Vof the' device the latch 43 for retaining the'water discharge valve 39 in open position isi provided with anfincline'd edge 44 againstwhich the free end of the vvalve operating Vlever 40 contacts, and this inclined edge tends to retain the water discharge valve in closed'position under the influence of the float 3l to which the latch is secured. As the discharge valve 39`is raised by the main float I8 theupper end of the latch 43 engages `beneath the free end of the lever 40, as'shown in Fig. 4, and thereby retains the valve in open position until the level of the water in the container lowers sufficiently to permit the iloat 31' to drop.

The manner in which the float actuated latch 43 illustrated in Figs. 4, 5 and 6 operates to retain the air intake valve 26 in open position does not differ'essentially from the operation of the float actuated latch 3| disclosed in Figs. 1, 2 and 3 and heretofore described, and further description thereof is therefore omitted.

In Fig. 1 of the drawings I have shown the relative positions of the various parts of the device during that portion of the cycle of operation when air is being expelled to a storage tank through the air outlet pipe Y23 and the level of the water Yin the the container I0 has risen sufciently to lift the iioat I8 to the limit of its movement on the valveactuating stem I4 but has not risen sufficiently to lift the float 2S and thereby open the air intake valve 2G. When the level of the water in the container rises sufficiently-to lift the float 29 and thereby open the valve 26,v the air pressure in the container is immediately relieved by the escape ofair through the air intake 25. With this decrease ofr thear pressure within lthe container, the buoyancy of float I8 ,is sufficient to lift the Water discharge valve I3 against the pressure thereon and the pressure exerted by the inclined edge of the float-operated latch. The discharge valve I3 lis retained in open position'by means of the float operated latch, and this latch also serves to retain the yvalve 26 in openposition during'the period of water discharge by reason of the engagement of the plate 30 on the upper end of the valve stem I4 with the float 29. The valves I3 and 26`are consequently held in their open positions until the level of the water in the container falls sufciently tolpermit the float 31 to drop and thereby disengage the latchfrom the water discharge valve. At this point the water Vdischarge valve moves to its closed'position,A carrying with it `the valve stem. I4 and the plate 30, whereupon the oat v29 is permitted to drop and thereby close the valve 26. Inasmuch as water is flowing into the container continuously through the water inlet` II .the'level of the water in the container-begins to rise as soon as the water discharge valve moves into its closed position,v and the water level continues to rise until it reaches such a height as is necessary to operate the float 29, whereupon the cycleY of operation continues as above described. Fig. 4 of the drawings shows the relative positions lof the vwater ydischtll'ge valve vand the air inlet valve during the period of water discharge, and it will be noted that the float operated latch not only serves to, retain the water discharge valve in open position but also operates, through the valve actuating rod and the float 29, to retain the valver26 in Yopen position, both valves being retained in open position until the water level lowers in the container sufficiently to permit the .oat actuated latch to be disengaged from the water discharge valve.

While I have disclosed herein two forms of water discharge valve and cooperating latching means, it will be understood that other changes may be made in the device without departing lfrom my invention so long as these changes come top thereof, and a'combined air outlet and inlet charge valve for said Water outlet, a float connected to said discharge valve for opening the same, an air inlet valve, a float for opening-said air inlet valve, means controlledby the movement of said discharge valve for holding said air inlet valve open when said discharge Valve is in open position, and a float mounted in the bottom of said container for resisting opening movement of said discharge valve and holding the same in open position.

2. An air compressor comprising a container having a Water inlet, a Water outlet in the bottom thereof, and an air inlet and an air outlet in the top thereof, a check valve in said air outlet, a discharge valve for said water outlet, a valve stem secured to said discharge valve and ,extending upwardly therefrom, a float mounted for limited longitudinal movement on said valve stern for opening said discharge valve, an air inlet valve, a float in the path of movement of said Valve stem and connected to said air inlet valve for opening the same, float actuated means for resisting the opening of said discharge valve, and float actuated means for holding said dischargervalve in open position.

3. An air compressor comprising a container having a water inlet, a water outlet in the bottom thereof, and an air inlet and an air outlet in the top thereof, a check valve in said air outlet, a discharge valve for said water outlet,`a valve stem secured to said discharge valve and extending upwardly therefrom; a pair of spaced stops on said valve stem, a float mounted for longitudinal movement on said Valve stem between said stops for opening said discharge valve, an air v inlet valve, a float for opening said air inlet Valve, and float actuated means for holding said air inlet valve open when said discharge valve is in open position.

4. An air pumping apparatus, the combination of a container haviner a Water inlet, a water outlet in the bottom thereof, and a valve controlled air inlet and a Valve controlled air outlet in the top thereof, a -discharge valve for said air inlet, a float for opening said discharge valve, a latch pivoted in said container adjacent said discharge valve for holding the latter in open position, means on said latch for resisting the opening movement of said discharge valve, and a oat member on said latch for actuating the same.

5. In air pumping apparatus, a container having a water inlet, a water outlet in the bottom thereof, a check Valve controlled air outlet in the in the top thereof, a valve for controlling the combined air outlet and inlet, a float in the top of said container for opening and closing said Valve, a oat in the bottom of said container, and means between the latter oat and the com'- bined air outlet and inlet valve to retain said valve in open position Afor the admission of air throughthe airinlet.

6. In air pumpingV apparatus, a container hav-` ing a water inlet anda water outlet in the bottom portion thereof, an air outlet in the top portion thereof, and a'combined air outlet and inletl in thev top portion thereof, a check valve in said air outlet, a'valve for the combined air outlet and air inlet, a oat in the upper portion of the container and connected to said last mentioned valve"for opening and closing the same, a discharge valve for said water outlet, an operating rod extending from said discharge valve to the upper portion of said container, guide means for said rod, spaced stops .on said rod, a iloat slidably mounted on said rod between the said stops, a latch mounted adjacent said discharge valve for holding the same in open position and said operating rod in raised position, a float secured to said latch for operating the same, yand means on said operating rod for holding the combined air outlet and inlet valve open when said rod is in its raisedposition.

7. In air pumping apparatus, a container having a Water inlet and a Water outlet in the bottom portion thereof, an air outlet in the top portion thereof, and a combined air outlet and inlet in the top portion thereof, a check Valve in said air outlet, a valve Ifor the combined air out- Lil] end pivoted to said lever, guide means ior the Y upper end of said rod, a float slidably mounted on said rod between spaced stops thereon, a iioat pivoted adjacent said lever, means on said float kfor engaging with said lever to hold said dis- WILLIAM GRIFFITHS.