US 2651263 A
Description (OCR text may contain errors)
Sg t. 8, 1953 w. w. MATHEWS CONTROL DEVICE Filed Oct. 3, 1950 .R 11 m w m t mm W W e@@ Wm \m N O 0 mm www Q. mm W mm Nu. Z a l! WWQ QB M w? m II W W w ATTORNEY Patented Sept. 8, 1953 UNITED STATES PATENT OFFICE 2.651,.263 CONTROL fiiivio'c William Watt Mathews; Richmond, Va. Application October 3, 1950, serial'ivo. 188,189 2 claims. (Cl. meme 1 This invention relates to a'control device and more particularly to such adevice used in connection with an internal combustion engine or other power mechanism having an electrical ignition system and used in conjunction with a pump. It also relates to a parent application now pending under Serial Number 142,031.
One of the most important uses to which this invention is adapted is in connection with an oil tank delivery truck. The usual tank truck, at the present time, is equipped with an oil pump in operative relation with the automobile engine. These pumps are made by various and sundry manufacturers and consequently their maximum efficiency in termsof revolutionsper minute vary. one pump may have a maximum efficiency of 500 R. P. M., while another may be rated at 400 R. P. M.
With such a variety of pumps,- naturally the motor engine must be made or adapted to syn chronize with the pump to produce its maximum efficiency. In tank trucks'to'day thisisnot done. For instance, the operator of a truck will put the pump in gear with the engine (whichis generally idling when the truck is sto1: ped)" and then pull the throttle to speed ffup the engine, and with such a manual operation it is almost impossible to obtain the-maximum efiiciency of the pump, and the engine is generally accelerated far beyond the necessary R. P. M. required to operate'the" pump. Under such conditions, there can bo'no automatic positive synchronization of the engine and pump since the engine is accelerated or operated by manual control.
In my parent application, as well as the present one, the foregoing disadvantages are eliminated. However, in the former application a manually operated electrical switch is resorted to to effect such synchronization; while in the present invention the electrical switch is automatically operated.
It is well known in the art of oil delivery by a tank truck that the delivery hose may be two hundred or more feet long, and this is necessary when the truck is parked in an alley or some remote place and the hose has to be taken to the point of delivery; which may be a considerable distance.
For instance, an operator, under parent application, must throw switch handle and then walk a considerable distance, with the extended hose, and while he is doing this the engine and pump are at their maximum efiiciency but no oil is being delivered due to the time consumed in the operative walking from the tank car to 2 the point of delivery. It is therefore obvious that during this period more gasoline is required to operate the engine; which totals a conside'r'able amount over a period of time.
One of the objects of this invention is the provision of a device which synchronizes the engine and oil pumpto produce their maximum efficiencies with respect to the R. P. M.
Another object of this invention is the provision of a device for automatically causing an engine and pump to operate at their respective eliiciencie's required for the delivery of a liquid.
A further object of this invention is the provision of a device to cause an engine and pump to operate at their respective efiiciencie's' required for the delivery of oil at the time such delivery is effected.
Other objects and features will more fully appear from the following description and accompartying drawings, in which:
Fig. 1 is a view in side elevation having portions broken away and partly in section to reveal clearly some of theinternal construction of the invention.
Fig. 2'is a schematic viewpartly in section of the invention in electrical circuit.
Referring to the drawings, a tank truck I has connected to its steering wheel 2 a bracket 3 which firmly secures a solenoid 4. The solenoid is provided with a plunger 5 (Fig. 2) which is movable in 'a chamber 6. An adjustable screw 1 is mounted in threadable fashion in one. end of the solenoid and has a spring 8 secured thereto and abutting the rear of said plunger. A cover 9f-is pivotally connected to one end of the solenoid and secured thereto by a lock Ill. The plunger 5 has an extension I! projecting therefrom and its end is mounted in slidable fashion upon an accelerator rod l2, one end of which is connected to a carburetor l3 and the other to a pedal secured to the floor of the truck as clearly shown in Fig. 1. A look nut 15 is secured to rod I 2, while extension I I, as aforesaid, has its end slidably mounted on said rod in spaced relation to said nut. A wire it of the solenoid connects one side of a battery l1, while one end of a wire 18 connects the other side of said battery and its other end is connected to an electrical contact [9 mounted in pivotal fashion in a box 20. A wire 2! of solenoid 4 connects a contact 22 secured in box 20. Supports 23 projecting from box 20 are secured to a cap 24 mounted in threadable fashion upon a top 25 of a check valve 26.
A pipe 21 connects one end of valve 26 and one side of a meter 28 its other side being connected by a pipe 29 which engages a pump 30 in operative relation with the engine of the truck. A feed pipe 3| has one of its ends connected with the source of fuel supply in the tank and its other end connected to pump 30. A pipe 32 has one of its ends secured to check valve 26 and the other to a hose 33 provided with a nozzle 34 having a trigger valve 35 therein for controlling the flow of a liquid.
Top 25 is provided with a guide 36. A rod 31 has one of its ends connected to contact 19 and extends through the bottom of box 2|), cap 24, top 25 and guide 36. The other end of said rod has a socket 38 into which extends a bearing 39 mounted upon one end of a valve 40 seated in the bottom portion of check valve 26. A spring 4| is disposed about the stem of valve 4|) and lower part of rod 31 and one of its ends on guide 36 while the other rests upon the rear of valve 40. A chamber 42 receives a liquid from pipe 21 and emits it to pipe 32.
When the tank truck is stopped for the delivery of oil, its automobile engine is idling and the device functions as follows: When trigger valve 35 of nozzle 34 is opened the pump causes a liquid to flow from the fuel tank through pipe 3|, pump 30, pipe 29, meter 28, pipe 21 to check valve 26. The liquid forces valve 40 to open against tension of spring 4|. When the valve is opened it actuates rod 31 which moves pivotal contact I9 into engagement with contact 22 thereby closing the electrical circuit.
Current flows from battery |1 through wire l6, solenoid 4, wire 2|, contacts 22-|9 and wire 18 to the other side of the battery. The solenoid causes the plunger to move into its chamber and extension engages nut I on rod |2 which actuates the lever of the carburetor to cause additional gas to be fed to engine to increase its speed.
By adjusting the set screw 1 to the proper position, with respect to lock nut l5, the plunger and extension may be made to move accelerator rod l2 any desired distance within the maximum efficiency range and thereby cause the engine and pump to operate at their respective maximum efficiency. When the proper adjustments are made all that is necessary to operate the device is to open trigger valve 35; and such preadjustment will give proper flow of fuel with respect to maximum efiiciency of engine and pump.
In this invention the conduit is partly rigid and partly flexible and includes the pipes 21, 29, the meter 23, the valve casing of check valve 26, the pipes 3| and 32, the pump 30, the flexible 4 hose 33 and its rigid nozzle 34 which is provided with the trigger valve 35.
The check valve 26 is mounted on rigid or fixed pipe 21.
Having described this invention, w t is claimed is:
1. In a device of the character describ d in combination with an automobile engine geared to a fuel pump, of a solenoid secured to said automobile; a carburetor on said engine; a rod connecting said carburetor and in operative relation with a pedal; a lock nut secured to said rod in adjustable fashion; an extension mounted in slidable fashion on said rod and secured to a plunger in said solenoid; a check valve provided with a rod having secured to one of its ends a valve head seated in movable fashion upon the inlet of said check valve and its other end in operative relation with a rod connected to an electrical contact in a box secured upon said check valve; an electrical contact secured in said box in juxtaposition to and in operative relation with said first named contact; a battery in electrical circuit with said solenoid and contacts; said contacts being in normal open position and adapted to engage each other when a liquid flows through said valve so as to automatically close said electrical circuit which causes said solenoid to actuate said extension into engagement with said lock nut and thereby move said rod to operate the'carburetor to increase the speed of said engine.
2. In a device of the character described, the combination with an automobile engine having a carburetor and being geared to a fuel pump connected with a source of fuel consisting of a check valve having an inlet connected with said pump and an outlet connected to a conduit; means for controlling the flow of a fluid engaging said conduit; an accelerator rod connecting said carburetor and actuating means, valvular means in said check valve in engagement with an electrical contact in circuit with a source of power,
an electrical contact in juxtaposition to said first named contact; a solenoid in operative rela tion with said accelerator rod; said contacts being in normal opening circuit position and adapted to engage each other automatically when a fluid is caused to flow through said check valve to actuate said valvular means and thereby cause the flow of current to actuate said solenoid and cause said rod to operate the carburetor to increase the engine speed.
' WILLIAM WATT MATHEWS.
No references cited.