US1000965A - Oil-pump. - Google Patents

Description

J. B. DAVIS.

OIL PUMP.

APPLIOATIQH FILED APR. 6.

Patented Aug. 15, 1911.

2 BHBETS8HEET 1.

J. B. DAVIS.

OIL PUMP. APPLICATION nun APR. 6, 1911.

1,000,965, Patented Aug. 15, 1911.

2 BHEETFBIBIZT F 9 5; 55 "A"? 1 r1431 225 37 4 I I .25 ingdractional quantities of oil.

UNITED sTATss ATENT OFFICE.

Joli-IN: B. DAVIS, F DAYTON, OHIO, ASSIGNOR "0 THE AMERICAN OIL PUMP AND TANK COMPANY, OF DAYTON, OHIO, CORPORATION OF OHIO.

- Specification of Letters Patent.

Patented Aug. 15, 1911 Application filed April 6, 1911. SeriaI No. 619,236.

will enable others skilled in the art to which it appertains to make and use the same,

reference being had to the accompanying drawings, and t0. the letters and figures of reference marked thereon, which form a part ofthis specification.

This invention relates to new and useful improvements in self-measuring oilpumps.

The objects of the invention are, to pro-' of oil delivered by the pump, to provide an improved form of supplemental counter which indicates the amount of oil that may ib'e delivered to a single container, and to provide an improved form of stop for limltiiigfithe action of the pump when dischargn the various municipalities throughout the' country, the laws relating to weights and measures provide for a sealer whose duties are to inspect measuring devices as well as scales, and if found to be correct, to place their stamp or seal upon them. In

the case of self-measuring oil pumps, the indicating stops which control the discharge 3. of the various quantities of oil are scaled after being adjusted to the proper positions. Heretofore it has been necessary to place a seal on each individual stop, owing to stops being controlled, in their locked positions,- by individual means such as set screws. The

resent invention obviates this and renders it possible to employ a single seal for all the stops, as will hereinafter more fully appear.

Referring to the accompanying drawings,

Figure 1 is a front elevation of a self mcasurmg oil pump with my improvements applied thereto, the same being partially in jsection; Fig. 2 is a side elevation of the same partially in section; Fign3 is a front elevation of the total counter; Fig. 4 is a top plan view oi the same; Fig. 5 is a section on the line a a of Fig. 2 and b b of Fig. 6, showing a detail View of the su )plemental of Fig. 5, Fig. 7 is a detail View of the stop mechanism for limiting the movement of the pump when dispensing fractional quan- 'tities; and Fig. 8 is a section on the line (l d i of Fig. 7.'

Throughout the specification and draw ings, similar reference characters indicate corresponding parts.

Referring more particularly to the drawings, 1 represents a cylinder mounted upon a lower chambered member 2 supported upon a base or pedestal 3.- Mounted upon the upper end of the saidcylinder is an up-' per chambered member 4: which is provided with an outlet orifice 5. and which is connected with the lower chambered member 2 by side tubes 6. The lower chambered member is provided with a suction inlet 7 and mounted within the chambers of the upper and lower members 2 and 4 are valves 8 which control the liquid passing therethrough. The liquid is pumped through the cylinder 1, members 2 and 4, and tubes 6 by a piston 9 mounted within the cylinder 1. and attached to the lower end of a piston rod 10. The piston rod 10 extends 7 upwardly through the upper member ,1 and a gland 11, and on its upper end it is provided with a rack 12 guided by the upper I In mesh withvthe rack 12 isa/pinio'n 14 mounted on a shaft 15 journaled in the frame 13, Fig. 1. Also mounted on the shaft15 is a gear 1 6 m mesh with a pinion 17 driven by a crank 18 having bearings in the frame 13. hen the crank 18 is oscillated, the .piston 9 is reciprocated, and the oil or other liquid is drawn in through the inlet 7 and discharged through the outlet 5. It is contemplated that the internal diameter of the cylinder 1 and the stroke of the piston is such that each upward and downward movement of thepi'ston will discharge a definite quantity of oil from the pump;

for example." one gallon. In the construction shown in the drawings, the stroke of the piston is such, that the amount of liquid discharged from below the piston willbe suflicient to compensate forthe shortage of that discharged from above the piston. due

to the displacement by the piston rod. to

secure the full discharge of the definite quantity by both strokes.

counter Fig. 6 is a section on't e line 0 c The above described mechanism consticounter consisting of wheels 21 progresarrangement of the ratchet sively actuated by transfer wheels 22. The wheels 21 and 22 are pivot-ally mounted on a frame 23, and the unit wheel 21 is provided with a gear 24 in mesh with a worm gear 25. The worm 25 is mounted on a shaft 26 which carries a gear 27 in mesh with a gear 28 which is in turn in mesh with a ear 29. The gears 28 and 29 are mounted on a plate 30 attached to the frame 13 and the gear 29 carries a ratchet wheel 31 engaged by a spring-controlled pawl 32 carried by an arm 33. The arm 33 is mounted on a stub shaft 34 attached to the shaft 15 on which the pinion 14 is mounted. The and gearing is such, that upon each oscillation of the crank 18, rack 12 and shaft 15, the unit wheel 21 will be rotated one tenth of a revolution, thereby registering the number of definite quantities of oil discharged from the pump. The wheels 21 are provided with numerals which may be read through a sight opening in a plate 19, and which are separated by intervening lines or dashes. The

number of gallons of oil may therefore be read directly from the counter, and the fractional quantities estimated from the po sition of the intermediate dashes.

A counter thus constructed is simple in construction and efficient in operation, and as the action is positive, the possibility of errors is entirely eliminated.

To ascertain the amount of oil that may be discharged into a single container, a supplemental counter that may be easily reset to zero is provided as follows. the frame 13 is a circular housing 35 provided with a pin 36 on which a counting wheel 37 may rotate. The wheel 37 is provided with a flange 38 having numerical characters which may be viewed through a sight opening 39 in the housing 35. The

wheel 37 is also provided with a marginal flange 40 by means of which said cou'nt-ing I wheel may be manually rotated in either direction to reset to zero. The central portion of the wheel 37 is provided with a ratchet 41 adapted to be engaged by a pawl 42 mounted on an arm 43 pivoted on the pin 36. The arm 43 extends out through an opening 44 in the housing 35, and the shape of the pawl 42 is such, that when the arm 43 is in a normal position, said pawl will engage the edge of the housing 35, thereby elevating the" pawl 42 and allowing the counting wheel37 to be freely and manually tion of the crank, the

' into the path of Mounted on rotated in either direction. The outer end of the arm 43 is provided with a resilient portion 46, such as a closed coil spring which is in a position to be engaged by a pin 45 on the rack 12 when said rack is reciprocated. The movement of the arm 43 is limited by the opening 44, and an extended movement of the rack 12 will be compensated for by the arm, which prevents the arm 43 acting as a stop for the rack and thus prevents strains being thrown on the counter. It will be seen that the supplemental counter is simple in construction and may be easily set to zero, as the counting wheel may be rotated in either direction. This is due to the fact that the actuating pawl is free from the ratchet when the various members are in a normal position.

To limit the upward movement of the rack 12 to various predetermined distances,

resilient portion 46 ofthe thereby allowing the pump, to discharge fractional quantities of oil at each oscillaprovided. Mounted in the frame 13 and lying parallel with the rack 12, is a rod 50 proxilided with threads preferably of small pitc with threads agreeing with the threads of the rod, is a plurality of stop members 51 adapted to be rotated thereon within sub stantially a circle. The rack 12 is proyided at its lower end with a lateral )rojection 52 adaptedto engage any oneo the stop members 51 when said stop member is swung to a position in the path of said projection. Each stop member 51 represents a definite quantity or fractional quantity of oil such as gallon, half gallon, quart and pint, and are arranged upon the rod 50 according to their value. When the stop member 51 representing a quart, is swung the projection 52, the movement of the rack 12 Wlll be limited to one fourth that when the pump is discharging its full capacity orone gallon. The particular construct-ion of the stop members 51 is such that space is provided in which to indicate the quantity of oil pumped when a particular stop arrests any further movement of the piston. The osition of the stop members 51 may be ad uSt'ed by rotate ing said members on the rod 50, and after they are set they are locked in their adjusted position by a rod 53 mounted in the Mounted on the rod 50 and provided following means areframe 13 parallel with the rod 50 and adjacent thereto. tion b a screw 54 over which a place by the proper oflicial. The placing of the seal of the oflicial sealer of weights;

53 will requlre a breakin of this seal and a. consequent violation 0 the The rod 53 is held in 'pos1- seal may be law by the continued operation of the pump after such breaking of the seal. As the upper member 51 represents the full discharging capacity of the pump, and in no case is it necessary to swing or rotate the same out of the path of the projection 52, said upper stop member 51 is provided with an extension 55 which engages the rod 53 and prevents possible rotation of the upper member 51 after it has once been adjusted. As this upper member 51 can never be swung out of the path of the projection 52, the pump can never discharge more than the maximum vpredetermined quantity of oil. A stop de vice thus constructed will allow a maximum number of stop members to be used, as each member is actuated independently; and as the screw threads are of fine pitch, the adjustment may be made very accurate. It will also be noted that the threads prevent the possible displacement of the stop members on the rod 50 from the continuous tapping of the projection 52.

Having described my invention, I claim:

1. In a device of the type specified, the

"combination with a casing of a reciprocatin member, a counting wheel rotatable in eit er direction, and provided with a ratchet, an arm adapted to be actuated by said reciprocating member, a pawl mounted on said arm, said pawl being constructed and arranged to engage an adjacent portion of the casing when said arm is lowered, thereby freeing it from engagement-with said ratchet 2. In a device of the type specified, the combination ofa reciprocating member, a counting wheel provided with a ratchet, an arm adapted to be engaged by said reciprocating member, a pawl on said arm adapted to engage said ratchet and to rotate said counting Wheel when said arm is actuated by said reciprocating member, said arm having a resilient portion whereby when the counter is fully actuated an extended move ment of the reciprocating member will not becommunicated to said wheel.

3. In a device of the type specified, the combination of a reciprocating member, a threaded .rod parallel with said reciprocating member, a rotatable indicating stop on said threaded rod adapted to be swung into a position to be engaged by said reciprocating member, and to limit the movement of sald reciprocating member, and means for preventing a complete rotation of said reciprocating member on said threaded rod.

4. In a device of the type specified, the

combination with a reciprocating member,

of a threaded rod parallel with said memher, a plurality of swinging stops mounted on said rod, each of which is adapted to be swung into a position to be engaged by said reciprocating member and out of such position, and means for preventing a complete;

reciprocating member, a plurality of swinging stops mounted on said bar and adapted to be swung into a position to engage said reciprocating member to limit the movement of the same, and a rod lying parallel with and adjacent to said threaded member and adapted to prevent a complete rotation of said stops.

6. In a self-measuring oil pump, the combination of a cylinder, upper and lower chambered members communicating with said cylinder, exterior valve-controlled pipes providing passages between said upper and lower chambers, a piston within said cylinder having an upwardly extended extended rod, a counting wheel for registering the number of reciprocations of said rack, an arm having a resilient portion, a pawl on said arm adapted to engage and rod, a reciprocating rack secured to said 5 actuate said counting wheel, and a pin on said 'raekadapted to'engage said resilient portion of said arm.

7. In a self-measuring oil pump, the combination of a cylinder, upper and lower chambered members communicating with 5 said cylinder, exterior valve-controlled pipes providing passages between said upper and lower chambers, a piston within said cylinder having an extended rod, a reciprocating rack on said rod, said rack having a stop extension thereon, driving means engaging said rack, a screw-threaded rod .mounted parallel with said rack. a series of indicating stops on said screw-threaded rod adapted to be individually moved out of and into engaging positions with the stop on said rack, and a parallel ro'd adjacent to said screw-threaded rod and. controlling the movement of said stops on said screw-threaded rod.

In. testimony whereof I aflix my signature, in presence of two witnesses.

JOHN B. DAVIS. Witnesses:

R. J. MoCAn'rY, HowARo S. SMITH.

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