US2166618A - Fuel pump - Google Patents

Description

y 1939- J. WILLIAMS 2,166,618

FUEL PUMP Filed May 18, 1938 2 Sheets-Sheet 1 0 2 an n cZWiZZiams mvENroR ATTO R N EYS y G. J. WILLIAMS 2,166,518

FUEL PUMP Filed may 1a, 1938 2 Sheets-Sheet 2 ATTO RN EYS Patented July 18, 1939 UNITED STATES PATENT OFFICE 2 Claims.

My invention relates to improvements in fuel pumps and more particularly to that type equipped with mechanism for denoting the quantity and indicating the price of liquid dispensed therefrom.

One of the principal objects of my invention is to provide means incorporated within a fuel pump for resetting the calculating mechanism which denotes the quantity and/or indicates the price of the liquid dispensed from the pump.

Another object of my invention is to provide a device of the above described character wherein the resetting means is operable for operating the switch mechanism for controlling the operation of the pump.

A further object of my invention is to provide a device of the above described character which is simple in construction, efficient in operation, durable in use and economical in manufacture.

Other objects and advantages will be apparent from the following description, appended claims and annexed drawings.

Referring to the drawings wherein like reference characters designate like parts throughout the several views:

Figure l is a front elevation of a fuel pump illustrating my invention incorporated therein.

Figure 2 is a sectional view taken on the line 22 of Figure 1.

Figure 3 is a view similar to Figure 1 showing the parts in another position.

Figures 4 and 5 are sectional views taken on the lines 4-4 and 55 of Figure 3 respectively.

In practicing my invention I employ a fuel pump 5 of typical construction and which is ordinarily used in dispensing gasoline or the like for use in motor vehicles. A typical form of said pump as illustrated in the drawings comprises a housing 6 having secured to the bottom thereof an electric motor I connected to a pump 8 by means of a pulley and belt assembly 9. Said pump is connected to a fuel intake line In and to a fuel discharge line I I. Said fuel discharge line ll has interposed therein a drive mechanism of ordinary construction housed within a casing l2. The drive mechanism is connected by means of a shaft l3 to a calculating mechanism. provided with indicia wheels l4 having indicia thereon visible through windows IS in a housing 16. Said calculating mechanism functions to denote the quantity and the price of gasoline dispensed through a hose connection ll connected to the outer end of the line H, the same being of ordinary construction.

The calculating mechanism is also provided with the usual shaft I8 for resetting the indicia wheels after a predetermined amount of the fuel has been dispensed from the pump. The outer end of the shaft 18 has fixed thereto a gear 19 in mesh with a gear 20 fixed on a shaft 2| on which is mounted a ratchet gear 22 for a purpose hereinafter described.

My reset mechanism, in the preferred embodiment illustrated in the drawings, comprises a bracket 25 secured to the bottom of the housing 6 and on the upper end of which is pivoted a substantial horizontally extending arm 26, one end of said arm being connected to and under the influence of a coil spring 21 connected to the bottom of the housing 6. A stop member 26 is secured to one of the Walls of the housing and serves to limit the downward movement of the end of the arm 26 to which the spring 21 is connected. The opposite end of the arm 26 has journaled therein a crank arm 29, one end of which is fixed to a disk 30 and the opposite end pivoted to the lower end of a connecting rod 3|. The upper end of the connecting rod 3! is pivotally connected to a yoke arm 32, one end of which is pivoted to the housing as at 33 and the opposite or free end 33a adapted to normally overlie and engage the upper face of a bumper 34, preferably constructed of rubber, mounted on the upper end of a support 35 secured to the bottom of the housing.

interposed between the bottom of the housing and the calculating mechanism is a horizontally extending shelf 36 on which is mounted a motor switch 31 equipped with a switch arm 38 having pivoted thereto the lower end of a connecting rod 39 for operating said switch and thereby effecting operation of the motor 1 through an electrical circuit (not shown). Operation of said motor serves to operate the pump 8 through the medium of the pulley and belt assembly 9 heretofore described.

One side of the housing 6 is provided with a bearing 40 in which is journaled a shaft 4| extending into the housing and the outer end of said shaft is equipped with a handle 42 for a purpose hereinafter set forth. Pinned on the inner end of the shaft 4| and movable therewith is an arm 43, one end of which is connected to the upper end of the rod 39 and the opposite end connected by means of a link 44 to a bell crank lever 45 pivoted to the housing 6. Subjacent the bell crank lever 45 there is provided a sliding bolt 46 having an inclined face 41 and fashioned with a projection 48 for engagement with the lower end of the bell crank lever 45 and said bolt is slidably carried in guides 49 secured to the housing.

A coil spring 50 embraces said bolt, one end of which engages one of the guides 49 and the other end the projection 48 to normally urge said bolt in a direction away from the rod 39.

The housing 6 is also provided with a pair of laterally extending spaced guide members 5| through which is slidably mounted a vertically extending bar 52 having an upper pivoted section 53.

Above and adjacent the lower guide member 5! said bar is fashioned with a projection 54 having an inclined face for engagement with the inclined face 41 of the bolt 46. member 5! the bar is equipped with a coil spring 55, the upper end of which engages the lower guide member 5| and the lower end a collar 55 secured on the lower end of the bar 52. The spring 55 serves to normally urge the bar towards the bottom of the housing 6 and the lower end of the bar into engagement with the free end 33a of the yoke arm 32 when the pump is in operative position as hereinafter set forth.

The upper end of the section 53 of the bar 52 has pivoted thereto an arm 51 rotatably mounted on the shaft 2!. Said arm 51 has pivotally mounted thereon a gravity actuated dog 58, said dog being adjustable relative to said arm by means of an adjusting screw 59 mounted in the upper end of the section 53 as clearly illustrated in Figures 2 and 3 of the drawings. Thearm 51 is equipped with a stop in El] for limiting the movement of the dog when the arm 5! is in raised position as illustrated in Figure 3.

Mounted on the inner end of the shaft 4| adjacent the arm 43 is a disk 6| formed with a cam section 62 and which provides a locking face 63 for engagement with one end of a lever 55 pivoted to the housing 5 as at 65. The opposite end of said lever is adapted for actuating engagement with a laterally extending section 66 of a vertically extending arm 51, the lower end of which is secured to the bar 52.

Mounted on the shaft of the motor "I is a disk 68 for frictional engagement with the peripheral face of the disk 35 for effecting initial operation of the reset mechanism.

In operation, the parts being in the position illustrated in Figure 2, the handle 42 is manually operated to impart counterclockwise movement to the shaft 4|. Upon rotation of the shaft 4| the 'arm 43 will be operated to actuate the switch 31 thereby starting the motor I and pump 8. Upon starting of the motor the disk 68 rotates causing disk in turn to rotate and thereby raise the yoke arm 32 through the medium of the crank arm 29 and connecting rod 3!. Raising of the yoke arm 32 effects a raising of the bar 52 and positions the dog 53 in engagement with the ratchet gear 22 as illustrated in Figure 3. As the bar 52 is raised the projection 54 thereon engages the inclined face 4'! of the latch bolt 46 to permit the projection 54 to seat upon the upper face of the latch bolt 45 as illustrated in Figure 3. During the upward movement of the bar 52 the laterally extending section 56 is likewise moved upwardly to permit the lever to be pivoted and rest upon the peripheral face of the disk 6|, the face 63 being disposed under said lever. In this position of the parts the free end 33a of the yoke arm 32 rests upon the upper face of the bumper 35, said bumper being in extended position due to the release of the pressure of the bar 52 therefrom. In this position the .yoke arm is disposed Below said lower guide in such a manner that the disk 30 is disengaged from the disk 68 and maintained therefrom by the tension exerted by the spring 21.

From the foregoing it will be apparent that when the parts are in the position as above described gasoline or other fuel may be dispensed through the hose connection I! and the amount dispensed together with the price thereof is indicated by the indicia on the indicia wheels I4 in the usual manner. Upon a predetermined amount of fuel being dispensed the same is cut off at the hose connection through the nozzle mechanism carried thereby in the usual manner and said nozzle mechanism placed in non-operating position on the support carried by the housing. In this position the indicia wheels 14 still indicate the quantity and price of the fuel dispensed and the motor and pump are still in operation, the fuel being by-passed to the fuel reservoir in the usual manner. To reset the calculating mechanism and actuate the switch 37 for stopping the motor and pump, the handle 42 is moved to impart rotation to the shaft 4! in a clockwise direction and thereby rotate the disk to permit the end of the lever to seat against the face 33. This movement of the shaft 4! also actuates the arm 43 in a manner to move the switch arm 3'! to break the electrical connection in the circuit to the motor and at the same time actuate the bell crank lever 45 through the medium of the link 44 to move the latch bolt 45 towards the rod and release the projection 54. Release of the projection 54 from the upper face of the latch bolt causes the bar 52 to be projected downwardly by the action of the spring 55 thereby positioning the end of the bar 52 in engagement with the free end 33a of the yoke arm 32 and effecting compression of the bumper 34 and engagement of the disk 30 with the disk 62 The downward movement of the bar 52 also imparts movement to the arm 5'! pivoted thereto and which in turn effects rotation of the gear 22 through the medium of the dog 58. Rotation of the gear 22 likewise rotates gear !9 through the medium of the shaft 2! and gear 25 and thereby resets the calculating mechanism through the medium of the shaft E8. The ratio of the gear 28 relative to the gear i9 is such as to cause the shaft l8 to be actuated in a manner to position the indicia wheels l4 slightly past reset position.

However, said calculating mechanism is equipped with a spring (not shown) which in. turn reverses the movement of the shaft !8 and positions the indicia wheels in reset position. When the bar 52 has been projected downward by the spring 55, the laterally extending section 62 of the arm 51 engages the end of the lever 64 and maintains the opposite end thereof out of engagement with the face 63 to permit rotation of the shaft 44 to 6 effect another pumping operation as heretofore described.

What I claim is:

1. The combination of a fuel dispensing pump assembly of that class provided with a housing in which is located a calculating mechanism for indicating the quantity of fuel dispensed, a pump for dispensing said fuel, an electric motor equipped with an armature shaft for operating the pump, a switch operable for controlling the electric circuit to said motor, and reset shaft for resetting said calculating mechanism; and of a reset device comprising a bar slidably mount- .ed in said housing and provided with a pivoted end section, a drive shaft mounted in said housingand geared to said reset shaft, a ratchet gear mounted on said drive shaft for operating the latter and said reset shaft, a connecting member pivoted to said drive shaft and said section whereby to maintain said section spaced from said gear, a gravity actuated dog pivoted on said member for operating said gear to reset said calculating mechanism, a manually operable shaft extending into said housing, an arm mounted on said last mentioned shaft and connected to said switch, a bell crank mounted in said housing and connected to said last mentioned arm, a spring pressed latch bolt operable by said bell crank for releasing said bar to actuate said reset shaft, and a drive mechanism connected to said armature shaft and engageable by said bar whereby said bar is actuated to a position for operating said reset shaft upon movement of said manually operable shaft to operate said switch.

2. The combination of a fuel dispensing pump assembly of that class provided with a housing in which is located a calculating mechanism for indicating the quantity of fuel dispensed, a pump for dispensing said fuel, an electric motor equipped with an armature shaft for operating the pump, a switch operable for controlling the electric circuit to said motor, and a reset shaft for resetting said calculating mechanism; and of a reset device comprising a bar slidably mounted in said housing and provided with a pivoted end section, a drive shaft mounted in said housing and geared to said reset shaft, a ratchet gear mounted on said drive shaft for operating the latter and said reset shaft, a connecting memberpivoted to said drive shaft and said section whereby to maintain said section spaced from said gear, a gravity actuated dog pivoted on said member for operating said gear to reset said calcu latlng mechanism, a manually operable shaft extending into said housing, an arm mounted on said last mentioned shaft and connected to said switch, a bell crank mounted in said housing and connected to said last mentioned arm, a spring pressed latch bolt operable by said bell crank for releasing said bar to actuate said reset shaft, a drive mechanism connected to said armature shaft and engageable by said bar whereby said bar is actuated to a position for operating said reset shaft upon movement or" said manually operable shaft to operate said switch, a locking lever pivotally mounted in said housing and actuated by said bar, and a cam fixed on said manually operable shaft and engageable by said lever to preclude actuation of said switch to close said circuit to said motor in advance of the actuation of said reset shaft by said bar.

GLENN J. WILLIAMS.

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