US1541851A - Dual fuel-supply system - Google Patents

Description

June 16, 1925. 1,541,851

w. M. RISTAU JR DUAL FUEL SUPPLY SYSTEM Filed Aug. 3, 1924 INVEN TOR.

1* 6 H By (19' Q bTTORNEY.

1;; OFFICE.

.szuJf-Efii], 33., F FEEDERECKSBU'RG, TEXAS.

DUAL FUEL-SUPPLY SYETEM.

:zi slmrg'. in UN: 1.

l Slate of res have ii certain new and nsci'nl Improvements in Will Funk oh the following is This invention relates to :1, dual fuel supply 'siem dcsigmccl primarily use in connection with internal combustion motors of molc" vehicles and aeroplanes, but it is to he unti. 'rsiood that s fuel snpply system in ncconhn'we with this invention, i he em- {)lflfVQLl for any purposes forwhieh it is found applicable, and the invcntion";1s for itsohii-zgi. izo prni'ide, in manner as irreinzifitcr iicill oi the class with a pair of fuel sn 'ply nicclmnisn'is no molly closed to an inhlko manifoid common herein and each including a. carburetor mlnplwi is connnnnicalc with such manifold and with each of id czn'hnreters indecni'lcnlly ronlrl is provide for the utilization of one to supply 4 bile the other is Llonnant. Under i comliiions if one of the carhnrctcrs has become impairs-i" or clogged ihe other carburetor can he. immedinteljnlilized to supply fuel in prevent discontinuance of tho operation of the .noior and to overcome for Further objects of the, invention are to provide, in a manner as hcreinn fter sci forth, :1 llllill h 1 supply SFSLR: which is simple in its mnstruc'iion and arrangement, strong, lllll" l compact, thoroughly eliicient'nml n5; i use, readily in allcd; anii niively inexpa'nsive to sci up.

' m and oiher objects in {he novel n and ngeznent more specincnily lls \l in the iiiicoinpmz ,Eng shown an 'flbil'mill lfilli. if is in be miller vaninimns am? will...

sch some within he can in: r scope of the claims hcreunto iijlpfiu In the drawings who: I: like characters rlcnole lhrnughmit the several i1;

Flynn? 'l is a fra'nncnl's dual fuel supply invention.

Fi ure *2 Figure 3 is n fragmentary View, in plan, of rho air control mechanism.

Figure 4 a perspective View of the throttle valves and the controlling mechanism lhcrei'or.

Figure .3 perspective view of the air controlling valves and the operating mechanism therefor.

Figure l; is a detail illustrating a closure plziic for the infnke manifold when one of the carbnrcters disconnected.

Referring to the drawings in detail, 1 denotes an intake manifold leading lo the (.Iv'lilltlfS of a motor and which at its outer end is provided with a pair of branches '2, 3.

Two cnrlmrelers of known construction are employed and when one is; active, the other is L :nmnt and by this arrangement if the native carburetor becomes impaired or clogged the other carhurcter can be placed in active position, under such conditions giwnvivlinn for the necessary supply of fuel to cause 'he continuance. of the operation of the mohir. (hie of the carburcters is inclicar d 2i. 4 and the other at 5.

The cox-laurel r 4 is provided with a fuel supply pipe e, which is detachably connected to lhe branch 3, at 7. The carburetor is provided with a fuel supply pipe which is detachably connected to the branch 9;, as at 9.

Leading from the carburetor 4 and (lecnrhnrefer and (lctnchably connected with the coupling 10 is an air supply pipe 12.

Connected to lhe coupling 10 is an air feed pipe 13.

By setting up he carburetors in the man oer siaaecl wiih respect to the branches 2. 3 and co filing 3.0, i he carbureters can b: removed '5 occasion.requires. If a carlnncicr 1. lat -chad from one of the branches of in: intake 1, the said branch is closed by a: c? sure plate 14, see Figure 6, which is ilzl? lili)l} scentedv in position.

lmsding from :51 gasoline reservoir to he carhnrcierj, is ieeifl pipe 16 having wsed zherein a controlling valve 17. ont-l the gasoline. 1 scrvoir 15 to 5., a feed pipe 33 having his-en il'zcifiin e controlling valve. 19.

Extendin dizrmeirically of the pipe 6, in proximity to {he eml th m 1'5, which is co! i lo Ylsc hranch as Well being journalled in said pipe 6, is a valve actuating shaft 20, carrying a throttle valve 21 which is arranged in the pipe (land provides means for controlling the passage of fuel through the pipe 6 to the branch 3. The shaft 20 projects outwardly from the pipe 6 and is formed. with a. crank arm 5:2 to which is attached one end of a pulling spring 23. The other end of the spring 23 is anchored to the pipe 6. The function-of the spring 23 is to normally retain the valve 21 in closed position and when the shaft 20 is actuated to open the valve 21, the mo ement of the shaft 20 is had against the action of the spring so that when the shaft is released the spring 23 will. rock the shaft. 20 in an opposite direction and close the valve. Suitable means is provided in the pipe 6 to limit the return move ment of the valve L, due to the action of the spring 23. i

The shaft 20 projects inwardly with respect to the pipe 6 and at a greater distance than What it project-s outwardly with respeot to the pipe (3, and the said inner projeoting portion of the shal extends through a hearin Ql provided on the lower end of a hanger arm 25, which depends from a bracket :26 secured to the intake manifold l. The inner end of the shall; 30 ca rics a curved crank arm 27 provided with a hifurcatcd upper end llxtcnding diametrically of the pipe 8, in proximity to the end thereof which is connectcd to the branch 2, as Well as being' journalled in said pipe 8, is a valve actuating shaft 29, carrying a throttle valve 30,

which is arranged in the pipe e and provides means for controlling l'lll pussage of fuel through the pipe 8 lo the branch 2. The shaft 21) proicvts out Wardly from the pipe 8 and is formed with a crank arm 31 to which is attached one end of a pulling spring 39. The other end of the spring IE2 is anchored to the pipe 8; The function of the spring 313 to retain the valve 31') in closed position and when the shaft 29 is actuated to open the valve 30, the movement of the shaft 29 is had against the action of the spring 32 so that when the shaft. .29 is rclcasvd the spring 2;; will rock the shaft in an opposite direction and close the valve lid Suitable means is provided in the pipe 8 to lim t the return movement of the valve 30, due to the action of the spring 2.12. The shalt 25) projects inwardly with respect to the pipe 8 and at a greater distance than what it projrvts outwardfv with respect to rho pipe 8, and the said inner projecting portion of the shaft 29 extends through a bearing $.3 providcd on the l() r end. of a hanger arm il-l, which depends from the bracket 36 SQ- cured to the intake manifold l. The inner end of the shaft 39 carries a curved rraul;

arm provided with a bifurcated upper end 37.

The curved crank arms 27, 36 are opp-a sitely disposed, with respect to each other so that the bifurcated end of the arm 27 projects in a direction towards the bifurcated end 537 of the arm 36. The arm 27 curves in an opposite direction with respect to the curvature of the arm 36. See Fig ure 4 The valves 21,, ill), crank arms 92, S2 and the curved crank arms 27, 36, are so set up that when the arm 27 is shifted to open the valve 91, the action of the spring; will cause the closin; of the valvrill. lVh-en the arm 36 is shifted to open ti valve 30, the action of the spring :23 will cause the closing of the valve 21.,

A shifting element, common to the arms 2], 38, is employed and said element is T- shaped in contour and. consists of ZLSLGHI 38 provided with a head 39, which is positioned between the curved crank arms 27 and 36.

if the shifting element is moved in the direction of the arrow A, Figure 4, the head :32) will engage the arm 36 and move it to the position shown in Figure 4, whereby the valve &0 will be shifted to open position. ll the shifting element is moved in the dirrc-tiou of the arrow 3. Figure -l, the head 1?. will rng'rlgi'o the bifurcated end of the arm :37, thcrchy actuating, the shaft 20 to open the valve i l, but as the head 29 is moved from engagement with the bifurcated end 31' of the arm So, the spring 32 will shift the shaft 2 to close the valve 30. When the arm as is in a position to align w th the arm :27, the valves will be closed. 'lhc stem 38 of the shifting element travels through a hanger arm ll), which depends fri'un the bracket 26.

Arranged within the pipes ll and 12 are air cont rolling valves ll, 42 respectively and Odill of whir-u is carried by a vertically disposed a tuatingslnil't 43 which extends diauiclrir-ully of the pipe. as well'as being journallcd llHi'LllL lach of the shafts 415 projects a subnautial distance above its irspcctive pipe and the latter has suitable means therein for limiting the closing movement of the controlling. valve. l ixedly secured to the upprr end of each of the shafts l3, cxtcriorlv of an air supply pipe, is an :znglwshapod member forrzzeol f a horizontally dispo ed leg: ll and a vertically dis- PU UKl lea l5. The vertical log of each of said members is provided with a transverse groove ll). and thrgroove 46 on one member is oppositely disposrd nith respect to the groove on the other member. Connected to the "vertical log of each of said members is a controlling; spring l2. The said controlliue' spring-s extend in opposite directions and are anchored to lugs l8 rarried by the volmliliii' l0. 'lhrangle-shaped members lvo provide mass for alternately operating the alves 41, 42, or in other Words, when the alve 41 is moved to open position the valve 3 is shifted by its controlling spring to losed position.

The angle-shaped memliers are alternately operated through the medium of a T-shaped shifting element comprising a stem 49, and a head 50. The stem 49 extends through an aperturcd support 51 carried by the ,coupling 10. The head 50 normally positioned in the grooves 46 of the vertical legs 45 of the angle-shaped members, and when these latter are in normal position the vertical legs thereof oppose each other. \Vhen the controlling element is shifted in the direction indicated by the arrow C, Figure 5, the valve 12 will be moved to open position and the valve 41 retained in closed position by its controlling spring, and when the element is shifted in the direction of the arrow I), Figure 5, the head 50 will engage the angles-ha ved member carried by the shaft of the valve 41 and will move the valve to open position, but as the shifting element moves in the direction 015 the arrow D, the controlling spring of tile valve 42 will move the latter to closed position. Stops 51' are provided for limiting the return movement of the angle-shaped members carried by the shafts 43.

Any suitable means can be employed for maintaining the stems 38 and 49 in the position to which they have been shifted.

The foregoing construction of dual fuel supply syst m provides means whereby each carlmrcter is imlcpcndently controlled and if one carburetor should become clogged or damaged, the other carhureter can be thrown into action. or it one of the carburetors is removed the other carburetor can be utilized for supplying the necessary fuel to the motor, and it is'thought that the many advantages ol. a dual fuel supply system in accordan e with this invention can be read ily understood, and although the preferred construction is as illustrated and described, yet changes in the details of construction can be had which will fall within the light of the invcntion as cla'in'ied.

'hal. I claim is: A

l. A dual fuel supply system conmrising a pair of carburetors each provided with an air inlet pipe and a l'uel supply pipe and means for independently and dctachably connecting it to the intake manifold ol a motor, a spring controlled throttle valve mounted in each of said supply pipes, a spring wntrolied air controlling valve mounted in each of said air inlet pipes, means shitting in opposite dircclimis and common to said throttle valves for opcrah iug' one imlepemlcnlly ot' the other, means connnon to said air controlling valves: for operating one independently of the. other and an independent valved gasoline feed pipe leading from a common source to each carburetor.

2. A dual fuel supply system comprising a pair of carburetors each provided with an air inlet pipe and a fuel supply pipe and means to independently and detachahly connect it to the intake manifold of a motor, a spring controlling throttle valve mechanism mounted in each of said supply pipes and having its stem formed with a curved crank arm arranged exteriorly of said pipe, said crank arms arranged in spaced relation and oppositely disposed with respect to each other, means common to said arms for-operating one of said mechanisn'is independently of the other, a spring controlled air controlling valve mechanism mounted in each of said inlet pipes and each provided with an angleshaped member exteriorly of said pipes, and means common to said members for operating one of said air controlling valve mechanisms independently of the other.

3, A dual fuel supply system comprising a pair of carburetors each having means adapted to be detachably connected to and independently comnmnicate with the intakt manifold of an engine, a throttle valve mechanism mounted in the said means of each of said carburetors, an air valve controlling mechanism for each of said earburcters, means shifting in opposite directions and common to said throttle valve mechanisms for opening one independent of the other, thereby providing for the activity of one of said carburetors while the other is dormant, and means common to said air valve controlling mechanisms for operating one independent of the other.

4. A dual fuel supply system for intemal combustion motors comprising a pair of carburetors each having means for independent communication with the intake n'ianifold of the motor, a normally closed throttle valve mounted in the said means of each of said carburetors, means shifting in opposite directions and common to said throttle valves for opening one independent of the other, an air supply means common to said carburetors, a pair of air inlet pipes leading from said supply means and each communicating with a carlmretor, a normally closed air supply wntrolling valve for each of said pipes, means common to said air controlling valves for opening one independent of the other, and an independ ent gasoline supply pipe leading to each carburetor from a common source.

A dual fuel supply system comprising a pair of carbin-etois each provided with an air inlet pipe and a fuel supply pipe and means to independently and dctachahly connect. it to the intake manifold of a motor, a spring controlled pivoted throttle valve inzninted in each of said supply pipes with pivot of each of saidvalvesextending hoiizeontally and projecting from. a supply pipe and having its inner end formed with crank arm,"a pivoted spring controlled air controlling valve mounted in each of said inlet pipes and having the pivot thereof dis posed vertically and extended from the inlet pipe and formedat one end with an angle-shaped member, means common to said crank arms for operating one of said throttle valves independently of the other, and means common to said angle-shaped members for. operatingone of said air contro-lling valves independently of the other.

' 6. A dual fuel supply system comprising a pair of carburetors, each provided with an air inlet pipe and a fuel supply pipe and means to independently and detachably connect it to the'intake manifold of a motor, a spring controlled pivoted throttle valve mounted in each of said supply pipes, with the pivot of each of said valves extending horizontally and projecting from a supply pipe and having its inner end formed with a crank arm, a pivoted spring controlled air controlling valve mounted in each of said inlet pipes and having the pivot thereof disposed vertically and extended from the inlet pipe and, formed at one end with an angle-shaped member, means common to crank arms for operating one oi said to tle valves independently oi the other, inea common to said angl 3d members for operating one of i 'r J(llll)i'( l.llllg valves independently the fill, and an air supply pipe cenmson to and air inlet pipes '7. A dual fuel supply system comprising a pair of carburetors, each provided with an air inlet pipe and fuel supply pipe and means to independently and detachably connect it to the intake 11 milold of a motor a spring controlled ivoted throttle valve mounted in each of said supply pi pes, with the pivot of each ol said valves extendingconnected to said let pipe and formed at one end with an angle-shaped member; means common to said crank arm for operating one of said throt' tlc valves independently of the other, means common to said angle-shaped members for operating one of said air controlling valves independently of the other, and an air supply pipe common to and connected to Said air inlet pipes, said means for operating said angle-shaped members supported at the point of connection between said air supply pipe andinlet pipes.

8. A dual fuel supply system comprising a pair of carburetors, each provided with an air inlet pipe and a fuel supply pipe and means to independently and detachably connect it to the intake manifold of a motor, a spring controlled pivoted throttle valve mounted in each said supply pipes, with the pivot of each of said valves extending horizontally and projecting from a supply pipe and having its inner end formed with a crank arm, a pivoted spring controlled aiicontrolling valve mounted in each. of said inlet pipes and having the pivot thereof disposed vertically and extended from the inlet pipe and formed atone end with an angle-shaped member, means common to said crank arms for operating one of said throttle valves independently of the other, means common to said angle-shaped members for operating one of said air controlling valves iiuthnpenclently of the other, and means connectcd with the intake manifold of an engine for supporting said crank arm operating means.

in testimony whereof, I afiix my sigmalure hereto WlLH ELM M. RISTAU, JR.

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