US1692921A - Pumping and metering apparatus - Google Patents

Description

Nov. 27, 1928. il 92,921

T. A. BANNING, JR

PUMPING AND METERING APPARATUS Filed Octl5, 1926 '5 Sheets-Sheet 1 Nov. 27, 1928.

T. A. BANNING, JR

PUMPING AND METERING APPARATUS Filed Oct. 13, 1926 5 Sheets-Sheet 2 Nov. 27, 1928.

T. A. BANNING, JR

PUMPING AND METERING APPARATUS Filed Oct. 13, 1926 5 Sheets-Sheet 5 Patented Nov. 27, 1928-.-

UNI TEDfSTATES PATENT OFFICE.

moms armmne, an, or WILMETTE, ILLINOIS.

PUMPING AND,ME'1ERING APPARATUS.

Application filed October 13, 1926. Serial No. 141,309.

This invention has to do with improvements in pumping and metering apparatus. It has to do particularly with improvements in apparatus for pumping and metering such liquids as gasoline, naphtha, oils and other liquids. The features of invention herein disclosed have been devised with particular con- .sideration of the requirements existing in the feeding of gasoline and fuel for automobile and other automotive service; and I have illustrated and will describe the invention with 'a particular view to meeting the requirements of such service; Nevertheless, it will be understood that the invention herein disclosed may also be used to advantage for many other classes of service and, therefore, I do not in-- tend to limit myself to the particular classes of service above explained.

One'of the objects of the invention is to provide a pumping and metering device in which use is made of displacement chambers or cylinders, both the inlet and discharge check valves being located at the upper ends of said chambers. By this arrangement there is assurance that the chambers will completely discharge themselves of any entrained or entrapped air at the very beginning of the pumping operation so that thereafter they will deliver a solid stream of liquid.

A further object in connection with the foregoing is to place both the inlet and dethereby leaving the space around the lower.

livery passages as well as the check valves adjacent to the upper ends of the chambers,

portions of the chambers available for the accommodation of other mechanisms.

' Another feature of the invention relates to the provision of variable displacement chambers in the form of expansible chambers.

These chambers are anchored at their upper ends and their upper ends are therefore sta tionary, which is also true of the inlet and dis-' charge valves and passages. The displacing actions are then secured by moving the lower ends of the chambers so that as said lower ends are drawn down the chambers are enlarged and a suction stroke is produced; Whereas, by raising the lower ends the chambers are reduced in siz e, thereby delivering or discharging a portion of thecontained liquid.

Another feature of the invention relates to the production of a very simple form of mechation of the different chambers by a common lnstrumentality located adjacent to their lower ends. 1

Another feature of the invention relate to the provision of a simple form of actuating means for the tilting plate member, said actuating means taking the form of an electric motor located above the'level of the chambers and in the upper portion of the structure, the tllt ng plate and lmmediately adjacent mechanisms being located adjacent to the lower ends of the chambers. By this means it is possible to operate the tilting plate and adacent connections'in a bath of lubricating 011 within which they are submerged, the motor and other parts being located above the level of said bath of oil and therefore unaffected by the same.

Another feature of the invention relates to the provision of a driving motor having such characteristics that the torque applied to the tilting plate driving mechanism will actually increase as the pumping speed increases, thus ensuring an increase of liquid fuel pressure at the higher pumping rates. This will be particularly desirable in the case of devices used for certain classes of service such as for feeding carburetors of internal combustion engines on automobiles and other automotive vehicles. By this means a more perfeet and satisfactory carburetor operation will be procured and at the same time the operation of the engine itself will be greatly improved. I

More particularly it is an object of the invention to drive the pumping devices by the use of a differentially compounded direct current electric motor, the compounding being such that the torque will increase as the speed increases. By proper design of this motor the same can so constructed as to give a. substantially greater turning eflort'or torque at the higher speeds than at low speeds. A further object in this connection is to provide a, motorwhich has a relatiyely' Another feature. in connection with the foregoing is the association of such a motor with a pumping mechanism itself whereby a desirable result is produced in the form of an increased liquid pressure at the higher rates of delivery.

A still further object of theinvention isto combine a suitable counting or integrating device with the mechanism so as to measure the quantity of liquid in suitable units, such as gallons. In this connection it is an object also to provide for simple calibration of the device whereby it becomes possible to lnsure accurate metering of the liquid at all speeds of operation. I I

A further 'object'in connection w1th the foregoing is to provide means for'preventing a backward rotation of the device, taking into account the fact that as far as the pumping action is concerned it will pump equally well for either direction of motor rotation. This feature of preventing a backward movement is desirable in the case of differentially compounded direct current motors, since in some instances these motors will start backwards Fig. 3 shows a horizontal section on the linev 33 of Fig. 1 lookingin the direction of the arrows;

' Fig. 4 shows a fragmentary horizontal section on the line 44 of Fig. 1 looking in the direction of the arrows;

Fig. 5 shows a fragmentary vertical section on the line. 5 of'Fig. 1 looking in the direction of the arrow but on enlarged scale; Fig. 6 shows a detail section through one I of the inlet ball check valves, being taken on the line 6 of Fig. 1 looking in the direction of the arrow but on enlarged scale;

Fig. 7 shows a fragmentary vertical section through the ball clutch which prevents backward rotation of the stub shaft but on enlarged scale as compared to Figs. 1 and 2;

Fig. 8 shows diagrammatically a series of fuel connections for connecting up the metering and pumping device to the fuel supply tank and to the engine carburetor; and

Fig. 9 shows a series of electrical connections for controlling the device and supplying the current thereto.

In the drawings I have provided a base plate 11, preferably circular in form. De:

pending from the bottom face of this plate are the three expansible chambers 12, 13 and 14, the same being preferably located at equidistant points around the center of the plate.

Each of these chambers has its upper end anchored to the bottom face of the base plate 11, as-by brazing, soldering or other suitable connection.

The lower ends of the chambers are closed by plates 15, such as shown in Fig. 1, and these plates are provided with central downwardly depending lugs 16 having the sidewise projecting stems 17 A tilting member 18 is centrally located with respect to the lower ends of all of the chambers. This member is preferably made of two sections having companion recesses which establish a spherical socket to accommodate the ball 19 on the upper end of a stem '20. The lower tilting member is provided with an opening 21 of suflicient size to receive the stem 20 and allow for the maxim-um amount of tilting movement which is desired.

The chambers and tilting plate mechanism are protected andare enclosed by a drawn or spun sheet metal cup 22. The upper edge 23 of this cup is flanged out and carried up against the bottom face of thebase plate 11. Thestem 20 of the ball and socket joint already referred to is conveniently mounted in.

the center of the bottom of this cup 22.

The base plate 11 is'provided on its upper face with two curved or arcuate passages 24 and 25 which are respectively for the inlet and discharge of the'liquid being pumped. These curved passages are established by thin walls reachingup from the base plate, as clearlyillustrated in Figs. 1 and 3. A curved cover plate 26 is placed on the upper edges of these walls and serves to enclose the passages 24 and 25 referred to.

An inlet check valve 27 establishes commu nication from the inlet passage 24 downwards into each of the expansible chambers, and a discharge check valve 28 establishes communication from each of the chambers upwardly into the discharge passage 25. These check valves are preferably made in the form of plugs which can be threaded down from above, prior to setting the cover plate 26 in place. The check valves are preferably ball valves and are of ample size to allow the necessary flow of liquid at the maximum pumping rate.

The discharge valves 28 are located above the upper ends of the respective chambers and are, therefore, at the highest points. The inlet check valves 27 are provided with side ports 29, as clearly illustrated in Fig. 1, said ports being immediately adjacent to the upper ends of the respective chambers so that there are no recesses or sockets into which air may become trapped and from which the air will not be effectively discharged at the beginning of the pumping operation. It

'amply supply of liquid is maintained.

The tilting member 18 .is intended to be rocked on the ball and socket'joint with a gyratory motion. For this purpose a central stem 30 reaches upwards froifl said member 18 through a hole 31 inthe central portion of the base plate 11. 8

A bridge plece 32 reaches over the cover plate 26 and establishes a bearing 33 for a stub shaft 34. The lower end of this stub spaft carries a worm gear 35 having a radial s 0t 36.

manner, as for example by an electric motor 40. The shaft 41 of said motor carries a worm 42 which meshes directly with the worm- I be calibrated so as to pump a definite quanti I erably through a control rheostat 67 and to upon the base block 11.

gear 35, the motor being mounted directly The number of motor revolutions is a measure of the total amount of pumping action which has been produced, since the device can ty per revolution of the worm gear 35.

therefore place a counting device 43.0n the motor shaft, said counting device being visible through a window 44 of the cap 45 which closes over the upper portion of'the structure. This counter can be so designed as to read directly in gallons or other suitable units of liquid .quantity. w

If desired, a flexible wire shaft 45 may be connected to the motor shaft by meansof a block 46, said flexible wire shaft 45 in turn beingcon'nected to a counting device on the dashboard of the vehicle.

, The tilting block 18 is intendedto tilt with a gyratory motion butv without any actual rotation. This tilting plate is provided with the arms 47, 48 and 49 which connect with .9 the studs 17 of the various chambers, so

.gyratory motion the various chambers are alternately expanded and collapsed.

that as the member 18 is oscillated with a The connections of these arms with the chambers will prevent a rotation of the member 18.;

but in orderto assist'in retaining the member 18 against rotation and for the purpose of relieving the various chambers of any dis- A block 37 has its stem 38 reaching through said slot 36, and a nut 39 serves as a .reach' down vertically from the base plate '11. Vertical springs and 56 are also connected to the arin 50, the spring 55 having its 7 upper end connected to the base plate 11 by means of a short clip 57, and the spring 56 having its lower end connected to a bracket '58 which reaches down from the base plate 11. These springs tend to prevent actual rotation" bf the member 18 and are sufficiently light .to not impose any unnecessary burden on the structure. In most cases they may be eliminated.

The motor 40 may be of any convenient construction; but preferably it is of such characteristics that it will give an increasing torque as its speed increases. For this purpose it may be a difi'erentially compounded direct current motor. In Fig. 9 I have shown diagrammatically a series of electrical connections for controlling said motor. These connections are of form convenient for use on an automobile or other automdtive vehicle. The battery 59 is the usual automobile battery and is grounded at 60. The switch 61 is the usual ignition switch for supplying current to the inductance coil 62 which is controlled by the distributor 63. The high tension side of said induction coil supplies current to the high tension distributor 64 which in turn. delivers the sparking current to the plugs 65.

I take a connection 66 from a point beyond the switch 61, said connection 66lead1ng prefcompounded direct current motors that they will start up backwards if the current is delivered to both the shunt and series fields at the same time, since the initial rush of the current through the series field Wlll take place before the shunt field has an. oppor-- tunity to build up. to its full strength. In order to prevent the motor from turning back wards at such time and thereby subtracting a reading from the" counting device 43 I have provided a lock on the stub shaft 34. This lock takes the form of a small disk 71 on" the upper end of the stub shaft, and the bridge piece 32 is provided with a slanting or tapered socket 72 in which is placed a ball 73. This ball is held in place by a small cover 'plate 74. If desired a small spring 75 may also be provided for holding the ball in the locking position.

With the arrangement thus described the shaft 34: may be rotated in a counterclockwise direction, but any tendency for it to rotate has been calibrated. v

Suitable lubricating oil may be placed in the cup 22 so as to practically submerge the clockwise will be resisted by the ball check.

The cover or cap 45 may be held in place in any convenient. manner; but preferably a pair of small seals 7 6 and 77 is provided for sealing the cover in place after the device tilting member 18 together with the adjoining connections. This oil may be readily in-.

troduced through asn'iall hole 78 in the cap 45, said hple being then covered over by a small capl9. The oil so introduced may be filled up to a level whichwill either partially or wholly surround the various expansible chambers, but it'will not interfere with the operation of the chambers because as they ride up and down in succession it will be found that the total amount of displacement which they occupy within the cup 22 is constant. Nevertheless, if necessary the oil may surge up and down through the opening 31 in the base plate 11, and the cap is pref erably. secured tightly to the base plate 11 so as to avoid any leakage under such conditions.

In Fig. 8 I haveillustrated diagrammatically a series of connections whereby the pres-' ent device feeds the fuel to the carburetor of an internal combustion engine. In this case the fuel supply tank is shown at 80, and carburetor at 81, and the engine at 82-. The pumping device of the present invention is shown at 83. The supply pipe 84 from the tank leads down through the cap 45 and connects with the inlet passage 24:; and the delivery pipe 85 leads fromthe passage 25 up through the cap 45 to the carburetor of the engine. The counting device 86 is shown in location on the dashboard of the automobile,

the same being connected to the flexible wire shaft 45* already referred to.

While I have here shown and described only a single embodiment of the features of secured to the base plate beneath the position of the channels aforesaid, means for sealing the lower ends'of said chambers, inletand :discharge check valves in the base plate between the channels and the upper ends of the chambers, a cup enclosing all of the cham- "bers andhaving its upper edge secured to the mea er operativeconnections between said member and the lower ends of all of the chambers,

there being a central opening in the base plate, an operating stem extending upwards from the tilting member through said opening, and means for moving said stem with a gyratory-motion comprising, ,a vert cal stub shaft above the base plate. a disk on the lower end thereof, a ball and socket joint connection between the "disk and the upper end of the stem, and means for driving the disk, substantially as described.

2. In a liquid displacement apparatus the combination of a base plate, inlet and dis charge passages above the same, a plurality of expansible chambers located around a common center and beneath the base plate and having their upper ends secured to the base plate at positions beneath said channels, inlet and discharge check valves between the channels and the upper portions of the chambers, a cup surrounding the chambers and having its upper edge secured to the basev plate. a tilting member within the cup and adjacent to the lower ends of the chambers, a ball and socket joint connection between said tilting member and the central portion of the cup, operative connections between said tilting member and the lower portions of all of the chambers for moving said lower portions up and down in succession, there being a central opening in thebase plate, a stem reaching from the tilting member-upwardly through said central opening, and means for causing said stem to travel with a gyratory motion, including driving means located above the position of the base plate, substantially as described.

3. In .a' liquid displacement apparatus the combination of a baseplate, inlet and discharge passages in conjunction with the same, a plurality of expansible chambers beneath the base plateand having their upper ends secured to the base plate in alignment with said passages, inlet and discharge check valves between the passages and the upper portions of the chambers, a tilting member adjacent to the lower portions of all of the chambers, a ball and socket joint for said tilting member permitting the same to be moved with a gyratory movement, operative connections between said member and the lower portions of all of the chambers,- and means for moving said tilting member with a gyratory motion from a position above the base plate, substantiallyas described.

l. In a liquid displacement apparatus the combination of a base plate; inlet and discharge passages in conjunction with the same," a plurality of expansible chambers beneath tween the passages-and the upper portions of the chambers, the inlet check valves, in-

cluding valve members located at a lower elevation than the upper ends of the respective chambers and controlling passages leading continuously upwards to points of delivery into the extreme upper ends of the chambers without pockets in said passages, and the discharge check valves including valve members located at an elevation at least as high as the upper end of the chambers to thereby completely eliminate entrapped air before delivery of pumped liquid, together with means for moving the lower portions of the chambers up and down in succession, substantially as described.

5. In a liquid displacement apparatus the combination of a plurality of vertical expansible chambers, means for anchoring the upper ends of the chambers against movement, a tilting memberadj acent to the lower portions of the chambers, means located adjacent to the upper ends of the chambers for moving said member with a gyratory motion,

operative connections between said member and the lower portions of the respective chambers, and inlet and discharge passages and check valves in conjunction with the chambers, substantially as described.

6. In a liquid displacement apparatus the combination of an expansible cliamber, means for anchoring the upper end thereof against movement, means for closing the lower end of the chamber, means for moving the lower portion of thechamber up and down for pumping actions, and inlet and discharge check valves in connection with the top of the chamber, the inlet check valve including a valve member located at a lower elevation than the upper end of the chamber and controlling a passage leading continuously upwards to a point of delivery into the extreme upper end of the chamber without a pocket, and the discharge check valve including a valve member located at an elevation at least as high as the upper end of the chamber to thereby completely eliminate entrapped air before delivery of pumped liquid, substantially as described.

THOMAS A. BANNING, JR.

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