US1857969A - Fluid dispenser - Google Patents

Fluid dispenser Download PDF

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Publication number
US1857969A
US1857969A US463125A US46312530A US1857969A US 1857969 A US1857969 A US 1857969A US 463125 A US463125 A US 463125A US 46312530 A US46312530 A US 46312530A US 1857969 A US1857969 A US 1857969A
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Prior art keywords
hose
switch
motor
bellows
pump
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US463125A
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David J Nelson
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Martin & Schwartz Inc
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Martin & Schwartz Inc
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of the preceding groups insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/07Integration to give total flow, e.g. using mechanically-operated integration mechanisms

Description

May l0, 1932. D. J. NELSON FLUID DISPENSER AFiled June 23. 1950 Patented May 10, 1932 UNITED STATES rafriilrlf oFFlcE DAVID J. NELSON, or HAMBURG, NEW YORK, AssIGNoR To MARTIN a SCHWARTZ, INC., 0E BUFFALO, NEW YORK FLUID DISPENSER Application :filed .Tune 23,

This invention relates to control improvements in fluid dispensers.

In the motor driven dial type of gasoline dispenser, it is usual, and sometimes compulsory, depending upon the requirements of the laws of various communities, to provide a manual control which is necessary to be manipulated to render the motor and pumping unit operable. This control is often of the telephone hook7 type and is adapt- .ed to receive a nozzle ofthe dispensing hose,

which by its weight'thereon moves the same to render the motor and pump operative. l/Vhen the nozzle is removed from the hook and the hook is lifted, the motor and pump are set in motion to supply the gasoline to the hose, wherefrom it is delivered through its nozzle by a suitable trigger actuated valve. lVhen the trigger is not operated, a certain liquid pressure is maintained in the delivery hose by the pump which is in continuous operation and excess gasoline is circulated through the pumping system by a suitable by-pass device. Many conditions arise which render the fluid pressure present in a dispensing hose extremely dangerous; for example, it often occurs that the attendant, after filling the tank of the automobile with gasoline, allows the nozzle to remain in the tank upon being called away to make change or the like, whereupon the driver of the automobile thoughtlessly drives away and pulls the hose from the dispenser. Since means are not provided to render the pump inoperative under these conditions, thepump continues to deliver gasoline through the broken orfractured hose until the control, such as the described telephone hook is manipulated to stop such flow.

Itis one of the objects of the present invention to provide a safety device on the hose to prevent spillage of gasoline upon occurrences as above described,'and also to prevent excessive and unnecessary use of the motor. This device chiey comprises a switch actuator located near the nozzle of the hose and connected to a switchl within the dispenser casing which controls the operation of the motor. The actuator is devised so that it normally maintains the motor circuit in 1930. Serial No. 463,125. l

inoperative position through the mentioned l switch, and therefore, manual pressure thereou is necessary to render the pump operative. 'l'his devicel is directly associatedwith the control on the dispenser and acts as an additional safety device therewith as more fully described in the accompanying specication and drawing.

ln the drawings:

Fig. l is a diagrammatic view showing the hook-up ot' the safety device with the operating unit of a gasoline dispenser.

Fig. :l is an electrical lay-out diagrammatically showing the safety device switch and the control switch in relation to the motor of the dispenser.

Fig. 3 is a front elevation showing the safety device switch.

Fig. -l is an elevation showing the safety device actuator attached to the hose.

Fig. 5 is a section on the line 5-5 of Fig. l.

' ln the drawings,-the numeral l designates a gasoline dispenser casing wherein is suitably mounted an electric motor 2 operatively connected to drive a supply pump 3. The motor-pump unit comprises a fluid supply device adapted to pump gasoline from the supply pipe 4 to the delivery pipe 5, from whence it is conveyedthrough a meter or suitable measuring device 5 to the exterior of the casing and into the supply hose, 6. The

`frce end of the supply hose is fitted with a nozzle 7 whichf is provided with' the usual valve mechanism aetuatable by the release trigger 8. The release trigger and valve mechanism are .usually resiliently maintained in au off position. When the pump is set iu motion by the motor 2, pressure is supplied to the hose 6 and to prevent rupture of the hose under such pressure, a by-pass valve 9 is interposed in the delivery pipe and suitably connected to return the liquid pumped by the pump V3 back to the supply line 4. Thus, when the pump is in operation and the trigger 8 is in its off position, a certain pressure is present in the hose 6 but such pressure isnot excessive as the by-pass valve 9 operates to return the liquid to the pump.

In Fig. l, a yieldable nozzle support l0 of i the telephone hook type is shown. This member is movable to the position shown in dotted lines on Fig. 1 when the nozzle 7 is placed thereon; and when the nozzle is removed, the support is manually movable to the position shown in full lines. The support is pivoted near its central portion and the interior extension thereof is connected by a connecting rod 11 to the throw arm 12 of the motor switch 13, which is adapted to throw the switch arm 14 therein, either in contact with the switch point 15, or out of contact therewith, the former when the support is in its raised position (full lines, Fig. 1), and the latter when the support is in its lowered position. For exemplary purposes, a simple electrical hook-up to the motor 'is lshown (Fig. 2) wherein one line 1'6 of the power circuit is connected directly to the motor, and the other line 17 is connected to the switch arm 14, from whence it leads through the wire 18 to the safety switch device 19, hereinafter more fully described, and from there to the opposite pole of the motor through the wire 20. It will be thus seen that the nozzle support 10, depending upon its two positions, controls the operation or non-operation of the motor.

The present invention aims to supplement the control feature of the nozzle support by interposing afurther switch element included by the switch box 19 previously mentioned, interposed in any suitable position in the motor circuit.

The switch device 19 chiefly comprises a housing 21 (Fig. 3) within which and secured to the lower wall thereof is mounted a bracket 22 having a vertical leg 23 provided with angularly bent extensions 24 and 25. On the base 26 of the bracket an expandible bellows 27 is secured, having an extending pin 28 provided on its top portion, and having an opening in its bottom connecting to a source of pressure, such as the tube 29 which is secured to the exterior of the housing by a suitable fitting and extends therethrough and through the bottom of the base 26 to connect with the bellows. On the vertical leg 23 of the bracket immediately above the bellows a stud 23 is secured and is adapted to receive and pivotally mount the bearing 30 of the tilt arm 31. The tilt arm extends from the stud 23 to a position between the extensions 24 and 25 for purposes as hereinafter set forth, and is provided with upwardly extending clip portions 32 adapted to resiliently engage the glass portion of a usual type of mercury switch 33 formed to provide an angular portion 34. A pair of spaced contact members 35 engage through the angular portion 34 `and extend radially to the bottom thereof. One of the leads 35 is electrically connected to the wire 18 of the motor circuit, the other, through the wire 20 connected to the lead 20 of the motor circuit.

Thus when fluid pressure is applied to the bellows through the tube 29, the bellows will expand upwardly and the pin 28 thereof will engage the tilt member 31 which will be urged upwardly about the stud 29 to the extreme upper position limited by its engagement with the extension 24. The accompanying mercury switch will likewise be tilted and the gravitational iiow ot mercury will Abe directed into the angular portion 34 to complete the electrical connection between the members 35, thus electrically connecting the wires 16 and 20. Upon release of the Huid pressure in the bellows, the tilt member 31 and the mercury switch will be free to return to its lower position, (dotted lines in Fig. 3), thus breaking the circuit between the wires 18 and 20. A. clip 34, adjustably mounted for resilient engagement with the extension 25 by the bolt 35, limits the downward movement of the tilt member 31.

The tube 29 extends through the casing to the dispensing hose 6 about which it is spirallywound and secured by means of tape or the like (not shown) and extends to the actuator member 37 which is located at a point on the hose in close proximity to the nozzle 7. The spiral winding of the tube 29 permits the bending and manipulation of the hose without materially affecting the lengt-h of the tube, since the spirals are self com.

pensating under such conditions. The actuator comprises a tubular body7 38 provided with integral lug portions 39 connected by an arcuate rib 40. This member is secured to the hose by a clamping ring 41 which encircles the hose and is provided'with angular lugs 42 which are adapted to be secured to the lugs 39 by the clamping screws 43. The end of the body extending toward the nozzle is shouldered at 44 and the opposite end is internally threaded vat 45. An actuator unit is insertible within the body and comprises a fitting 46 having a wrench portion 47, an adjacent threaded portion 48 adapt-ed to engage the threaded portion 45 of the body, and a shouldered portion 49 over which is adapted to be secured an end of the bellows 51. The iitting is. drilled through to provide an opening` 50. The bellows, which is open at both ends, extends the length of the casing and is closed at its end by a button member 52 which is provided with an arcuate extension 53 which protrudes beyond and through the opening of the body member, and is shouldered at 54 to abut the shoulder 44 of the body when the bellows is in extended position as shown in Fig. 4. A spring 55 is mounted under tension within the bellows between the button 52 and the fitting 46. The tube 29 is secured to the tting 46 in a suitable manner and is thereby connected for fluid action through the opening 50 of the fitting to the interior of the bellows.

The bellows 27, the tube 29, and the bellows 51 are filled with a suitable liquid,"suc h as oil, and sealed in a proper manner to enable the bellows 51 to b'e urged to its outward position as shown in Fig. 5, to compress by fluid pressure the bellows 27, so that the manual actuation of the button 52 in a direction away from the nozzle 7 will displace oil from the bellows 51 to actuate the Huid within the tube 29 to expand the bellows 27, and thus -a'ctuate the mercury switch as heretofore described.

In practical use when it'is desired to operate the dispenser, the nozzle 7 and accompanying hose are lifted fromsupport 10, the latter member is then manually lifted to connect the switch arm 14 withthe switch point l5 as heretofore described. The free end of the nozzle is then inserted in the gasoline tank of the automobile by the attendant who, gripping the hose with one hand and the nozzle with the other hand, is able to depress the button 52 to close the mercury switch and thereby the motor circuit to supply fluid to the hose 6, and to press trigger 8 withthe other hand to discharge theliquid supplied to said hose. Should the operator, through necessity 'or carelessness, allowl the hose to remain in the automobile tank and abandon his filling operation, he must necessarily release his hold on the hose and thereby release the button 52 upon which the spring 55 will restore the bellows and accompanying button to its normal position, and simultaneously contract the bellows 27 to restore the mercury switch to its inoperative position. The motor circuit will thus be broken and the pump will.

mounted therein, an electric motor for operating said pump, switch means in the motor circuit to control the operation of said motor, a dispensing hose supplied with liquid by said pump, a bellows connected to vsaid switch means, and manually operable means on the free end of said hose having fluid connection with said bellows, said manually operable means being adapted to supply fluid to said bellows to expand the same and thereby oper? Yate said switch. i A

4. In a fluid dispenser, a casing, a pump mounted therein, an electric motor for operating said pump, switch means in the circuit of the motor to control the operation of said motor, a dispensing hose supplied with liquid by said pump, a bellows connected to said switch means, a manually operable lactuator mounted on the free end of said hose and having fluid connection with said bellows, and a spring in said actuator, said actuator being manually operable in one direction to expand said bellows and thereby operate said switch and being restored to its normal position by said spring to contract said bellows and thereby move said switch to open said circuit.

DAVID J, NELSON.

cease to operate, thus relieving the pressure a strain on the hose 6,'and in the event of subsequent rupture of the hose under conditions previously described, a serious loss of gasoline and the accompanying fire hazard will be prevented.

What is claimed is:

l. In a fluid dispenser, a casing, a pump therein, a motor thereinv for operating said pump, switch means in the motor circuit to control the operation of said motor, a hose supplied with liquid by said pump, means on the free end of said hose for operating said switch means, and means on said casing for conditioning said circuit for operation by said first named switch means.

2. In a' fluid dispenser, a casing, a pump therein, a motor therein for operating said pump, switch means in the motor circuit to cont-rol the operation of said motor, a dispensing hose supplied with liquid by said pump, fluid pressure operated switch operating means adjacent sai-d switch, manually operablefiuid pressure means mounted on the vfree end of said hose, and fluid connecting means connecting said operating means and said pressure means, said pressure means being adapted to move said operating means to cont-rol said switch.

3. In a Huid dispenser, s. casing, a pump las

US463125A 1930-06-23 1930-06-23 Fluid dispenser Expired - Lifetime US1857969A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2692706A (en) * 1950-07-27 1954-10-26 Wiksten Carl Jay Air pressure caulking gun
US2754950A (en) * 1948-10-09 1956-07-17 Charles F Harris Check controlled liquid dispenser
US2778531A (en) * 1953-02-12 1957-01-22 David L Lauer Conduit flow control system
US4498606A (en) * 1982-11-18 1985-02-12 Dirienzo Armand Emergency fuel flow shut-off device
US5529226A (en) * 1994-09-01 1996-06-25 Alberth, Jr.; Rudy Spray nozzle attachment

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2754950A (en) * 1948-10-09 1956-07-17 Charles F Harris Check controlled liquid dispenser
US2692706A (en) * 1950-07-27 1954-10-26 Wiksten Carl Jay Air pressure caulking gun
US2778531A (en) * 1953-02-12 1957-01-22 David L Lauer Conduit flow control system
US4498606A (en) * 1982-11-18 1985-02-12 Dirienzo Armand Emergency fuel flow shut-off device
US5529226A (en) * 1994-09-01 1996-06-25 Alberth, Jr.; Rudy Spray nozzle attachment

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