ïocfl 22, 1946. _ 2,409,937 J. HUTCHINSON CARBURETOR ATTACHMENT' Filed Dec. l2, (1944 l - INVENTOR. Jôb )fu ?cîza'nson Patented Oct. 22, 1946 2,409,937 m “ UNITED STATES m PATENTA `oFFlcE 2,409,937 Y CARBURETOR ATTACHMENT Job Hutchinson, Great Neck, N. Y. p Application December 12, 1944, Serial No. 567,870 ` 2 Claims. (Cl. 48-180) l 2 The present invention relates to attachments for carburetors. It is known that in cold weather automobile engines are diflîcult to start. A standard method of facilitating the starting of cold engines is to cut oli or choke olf the air intake at the car buretor. When the engine is warmed to a nor . shown in Fig. `6 shown fixed between the car buretor and the intake manifold. ‘ The device shown in Figs. 1 to 5 inclusive is intended for use on eight cylinder automobiles and the device shown in Figs. 6 to 8 inclusive is intended for use on four to six cylinder automo miles. In Fig. 8 the normally adjoining parts mal operating temperature, the choke is released of the carburetor and intake manifold of a six and air is permitted ,to enter the carburetor cylinder automobile are shown, the second -em thereby providing a leaner explosive mixture. 10 bodiment being sandwiched in between said nor mally adjoining parts. The present device is intended to be used in conjunction with conventional carburetors and Referring now to Figs. 6 and 7, the device including carburetors in automobiles which are therein shown has a pair of upper and lower not provided with automatic choking means. plates 10 and a thin gasket III sandwiched in be Essentially, this invention comprises a device tween saiö- plates. The overall dimensions of the for automatically admitting an auxiliary flow of plates correspond to the dimensions of flange I2 air into the passage through which the explosive mixture from the carburetor to the intake mani of the intake manifold and flange I3 of the car buretor. Screws I4 hold the two plates together. Oppositely situated holes I 5 in said plates regis fold passes, when the engine is warm and for automatically cutting off said auxiliary flow of 20 ter with corresponding holes in the above men air when the engine is cold. Its principal object, therefore, is the provision tioned flanges and accommodate in association with said flange holes screws or bolts IE6. It is of a device for automatically rendering the ex plosive mixture leaner when the engine is oper these> bolts that hold the device in place between ating at its normal functioning temperature, It will be seen that in the center of each said plate I0 is a somewhat large circular aperture I'I and that a bridge I8 integral with said plate spans said circular aperture on a line passing through thereby providing a better mixture at a considera- ` ble saving of gasoline. . said flanges. ` ` Another object is the provision of a device of the character described which contains auxiliary its center. The shape and dimensions'of' circular automatically operated air supply means and 30 aperture I'I correspond to the cross sectional auxiliary automatically operated explosive mix shape and dimensions of passage I9 of the mani ture mixing means functioning in conjunction fold and passage 20 of the carburetor through with said iirst mentioned auxiliary means. which the explosive mixture normally passes. These and other objects are attained by mech When the device is ñxed tothe flanges of the anism illustrated in the accompanying drawing manifold and carburetor as shown in Fig. 8, pas in whichi ' l sages I9 and 20 and circular aperture I1 register Fig. 1 is a plan view of one of the embodiments with one another. of the device, partly broken away to expose one ` A pin 25 is ñxed at one‘end to the center portion of the auxiliary air distributing grooves; ` of bridge I8 of upper plate I0 and at the other Fig. 2 is a vertical longitudinal section on the end to bridge I8 of the lower plate I0. Mounted line 2--2 of Fig. 1; on said pin is a self-lubricating bearing 25 and Fig. 3 is a side elevational view of the device mounted on said bearing is a fan 2'I, said fan shown in Fig. 1; ‘being rotatably mounted with respect to pin 25. Fig. 4 is a perspective view of that part of the It will be seen in the drawing that a circular device which is shown in Fig. 2, partly broken 45 groove 28 of a diameter somewhat larger than the away to expose the auxiliary air distributing diameter of circular aperture I'I is formed on the groove shown in Fig. 1; meeting faces of plates I0 in concentric relation Fig. 5 is a detailed sectional view on the line to said circular aperture, the groove on the upper 5--5 of Fig. 1 showing one of the thermostatically face registering with the groove on thelower face 50 and forming therewith a single groove 29. A pas controlled valve units; Fig; 6 is a plan view of a second embodiment of sage or boring 3U formed in the upper of plates the device; I0 provides communication between grooves 28 Fig. 7 is a vertical longitudinal sectional view andthe atmosphere. A second passage or boring on the line ‘I-1 of Fig. 6;l and ‘ y ` 3| formed in the lower of plates I0 also provides ‘ Fig. 8 isa fragmentary ‘side View of the device 55 communication between grooves 28 and the at 2,409,937 3 4 mosphere. A small depression or ball-valve seat 32 is formed at the atmosphere end of passages 30 and 3| for a purpose which will hereinafter prises a pair of upper and lower plates 50 which are substantially rectangular in shape.' The rea appear. son for this :configuration is that the normally adjoining flange members of the carburetor and intake manifold of conventional eight cylinder It will be seen in Fig. '7 that gasket Il extend 5 automobiles are of corresponding rectangular from the edges of plates l0 to the outer circum shape. In place of circular aperture l1 of the ference of single groove 29 and not beyond said groove to circular aperture l1. A space or slit embodiment first .above described, the present 33 will therefore be formed between plates I0 embodiment has two circular apertures 5I and 'of a depth corresponding to the thickness of 10 52 formedin'each of said plates 50. Bridges gasket Il, between groove 29 and circular aper E3 and 54 respectively, span 'the circular aper tures of plates 59. A pin 55 is fixed to bridges ture I1. Communication will thereby be elïected between said groove 29 and said circular aperture I 53 and pin-59 is fixed to bridges 54 in the same I1. The'function of said slit will hereinafter be manner and place as pin 25 in the bridges of the ñrst embodiment. set forth. Aiiixed to one of the side edges of the upper of Mounted on pins 55 and 56 are self -lubricating plates I0 by means of screw 34 is a bi-metallic bearings 51 and 53 respectively, and mounted strip 35 having a freely movable end on which on said bearings are fans 59 and 60 respectively. a ball 36 is ailixed. An identical bi-metallic strip Like> fan 21, fans 59 and 60 are freely rotatable 31 is an‘lxed at one end by means of screw 38 to relative to their respective pins. the opposite side edge of the lower of said plates Plates 5d are separated by means of a thin l5. It, too, is providedat its freely movable end gasket 6l which performs the samefunction as with ka ball 39. YThe choice of metals is such in - gasket . Il ofthe ñrst described embodiment. said b_i-met‘allic strips that a change in tempera ture »will cause outward movement of the free ends of said strips away from the plates to which Corresponding to grooves 28 of the i-lrst described embodiment are C-shaped grooves 62 and 63 formed on the meeting faces of plates 50. They they are respectively afiixed. It will be noted that areA concentric with circular apertures 5IV Aand 5'2 when these bi-metallic strips-which of course andare in registration, respectively, with each comprise thermostatic members-are in their other thereby forming grooves 94 and 65 respec normal uncurved state, their respective balls 36 30 tively. They are not completely lcircular grooves and 39 rest snugly against seats 32 in said plates, forthe reason that the close proximity of cir thereby effectively shutting off communication cular apertureâ! to circular aperture `52>>renbetween the atmosphere and groove 29 through ders this impossible. i Like the gasket in thefirst passages 30 and 3l. described embodiment, gasket 6! extends from The device operates as follows: ~ 35 the outer edges of plates 50 to ,the Vouter cir When the engine is cold, or the temperature cumference of grooves B4 and 55. `In consequence, of the outside air is below 32° F., the bi-metallic a narrow Aslit §55V is formed between groove 64 strips 35 and 31 will maintain their normal un and circular aperture 5l and a second slit,61 is curved position, thereby maintaining their re formed between groove 65 and circular aperture spective ball members in close contact with seats 40 52. These slits are in communication with each 32. When these bi-metallic strips are so situated, other in the area separating circular aperture air cannot pass from the atmosphere into and 5! from circular aperture 52. Communication through passages 30 and 3l. When the tempera between groove 64 and the atmosphere is pro ture of the engine increases, however, or when vided by passage or .boring 19, and communi the air is warmer than 32° F., bi-metallic strips A U' cation between groove 35 and the atmosphere 35 and 31 will be caused to bend or curl out` is provided by passage or boring 1|. Eachisaid wardly, thereby disengaging ball members 316 and boring is provided at its outer end with a small 39 from their respective seats 32. Communica -depression or ball-valve seat 12 which corre tion between the atmosphere and groove 29 sponds in function to ball-valve seats 32> of th through passages 3|) and 3| would thereby become 50 embodiment first above described. ' ~ l established. Since there is communication be Amxed at one end to the upper of plates 5i) tween groove-ZQ and circular opening I1 through by means of screw 13 is a bi-metallic strip 14, slit-,33, communication between circular aperture l1 and the atmosphere will be effected by the departure of balls 36 and 39 from their respective seats 32. The suction that draws the explosive and affixed lat one end to the lower of platesA 50 by a means of screw 15 is a bi-metallic strip 16.~ YA ball 11-is ñxed tothe free end ofbi-> metallic strip 14 and a ball 13 is aflixed to the mixture from the' carburetor/'through passage freerend of bi-metallic strip‘15.-` Itv will be seen 2i) of the carburetor will also draw said mixture in Fig. v1 that said bi-metallio strips bend in through the circular aperture l1 and the mani both directions. When’it is cold, that is when fold passage I9. In consequence of said action, 60 the engine is cold, or when the temperature of airwill'be drawn in from the atmosphere through the outside air is below 32° F., _the strips bend passages 36 and 3l into groove 29 thence through inwardly and cause theirv respective ball mem slit 33 and finally into circular aperture l1. The bers to enter into close contact with their respec newly admitted air will be mixed with said ex tive seats, thereby eiîectively shutting oif com plosive mixture’by> the action of fan 21, which munication between the atmosphere and grooves fan iscaused to rotate by the same suction which 64 and 65. When the >temperature of the outer draws the explosive mixture out of the carbu air rises above 32° F. or when the» engine is retor and the additional air out of the atmos warmed up, the bi-metallic strips bend outward phere. _ lyl thereby causing their vrespective ball mem Referring now to the embodiment of the in 70 bers to disengage their respective seats. Air vention shown in Figs. 1 to 5 inclusive, it will is therefore free to flow through passages 10 be seen that the basic principle and basic ele and 1l into grooves 64 and 65 and thence through Vments of said embodiment are identicalr with slitsl 69 and 61 into circular apertures 5i and those of the embodiment ñrst above described. 52. Such flow is induced'asabove mentioned The fernbodimentnow . under consideration. com 75 bythe suction vof the, engine which draws‘the -ex 2,409,937 5 plosive mixture from the carburetor. The suc tion also causes rotation of fans 59 and 50 there by effectively mixing the newly admitted, air with the explosive mixture. The embodiments above described are but pre ferred embodiments of the invention. Construc fold, an air distribution chamber surrounding Y said passage and communicating therewith, a pair of oppositely situated passages which provide communication between said distribution charn ber and the atmosphere, a pair of thermostatical ly controlled valves on said pair of passages which open at a predetermined temperature to permit an auxiliary supply of air to be drawn into said tional modiñcations may be incorporated therein without departing from the basic principles ñrst passage through said pair of passages and thereof. For example, there is nothing critical about the precise shape of plates l!) and plates lO said distribution chamber, and a freely rotating fan in said first passage which mixes the auxiliary 50. They may be made to coliform to whatever supply of air with the explosive mixture, each of shape the normally adjoining carburetor and in said thermostatically controlled valves compris take manifold‘ñanges are fashioned. Other types ing a 'bi-metallic strip having thermostatic prop of thermostatically controlled valves may be used erties, aiîlxed at one end to said attachment and in place of the thermostatically controlled ball having a plug affixed to its free end registering _ valve shown and described. The gasket may be with the particular passage which the valve con madeof material that conducts heat well or of trols. material that does not conduct heat well, de 2.‘A carburetor attachment for insertion be pending upon whether it is desired to have both plates receive heat by conduction -from the mani 20 tween the carburetor and the intake manifold of an internal combusion engine, said attachment fold or whether it is desired to have only one having a plurality of passages through which the of the plates receive such heat-_the other plate explosive mixture from the carburetor passes to being exposed only to the heat of the air. A gas the manifold, air distribution chambers surround ket may be interposed ubetween the device as a ing said passages and communicating with them, whole and the intake manifold ñange, thereby secondary passages which provide communication effectively removing said device from thermal con between said distribution chambers and the at tact with the manifold. In such case, the ther mosphere, thermostatically controlledV valves on mostatically controlled valves on said devices said secondary passages which open at a pre would be subject solely to the temperature con determined temperature to permit an auxiliary ditions of the air surrounding them and not to supply of air to be drawn into said ñrst men the heat which in the other embodiments is con tioned passages through said secondary passages ducted to them from the manifold. Although a temperature of 32° F. has herein and said distribution chambers, and freely rotating -fans in said first mentioned passages been mentioned, said temperature is not critical, and the thermostatically controlled valves may 35 which mix the auxiliary supply of air with the be designed to open at any other temperature. explosive mixture, each of said thermostatically controlled valves comprising a loi-metallic strip I claim: ` 1. A carburetor attachment for insertion be having thermostatic properties, affixed at one tween the carburetor and the intake manifold of end to said attachment and having a plug añixed an internal combustion engine, said attachment 40 to its free end registering with the particular pas having a passage through which the explosive sage which the valve controls. mixture from the carburetor passes to the mani JOB HUTCI-HNSON.