US1191190A - Carbureter-receptacle and mechanism for making same. - Google Patents

Description

F. L. KINGSTON.

CARBURETER RECEPTACLE AND' MECHANISM FOR MAKING SAME. APPLICATION man JUNE 6. 1913.

1 191,19O. Patented July 18, 1-916.

fSHEETS-SHEET l.

1w: Iva/(m5 PETERS can Pncmuma. wasmrmnm. n L

F. L. KINGSTON.

CARBURETER RECEPTACLE AND MECHANISM FOR MAKING SAME.

APPLICAHON men JUNE 6. 191a.

Patented July 18, 1916.

4 SHEETS-SHEET 2- Mrzvififiza hum/70B.

F. L. KINGSTON. 1 CARBURE-TER REGEPTACLE AND MECHANISM ron MAKING SAME.

APPLICATION FILED JUNE 6. 1913.

1,1 91,1 90. Patented July 18, 1916.

4 SH T 3.

EETS-SHEE mT/Y55.955.'' 4 1 lvyzjyram QKW $54M 4 M M JTTYE.

F. L N.

CARBURETEK RECEPTACLE AND MECHANISM FOR M AAAAAAAA E.

- IIIIIIIIIIIIIIIIIII E e. 1913. 1 ,1 9 1 ,1 90. Patented July 18, 1916.

' 4 ssssss SHEET 4.

I M l11ra n a.

FRANK L. KINGSTON, OF CLEVELAND, OHIO.

CARIBUIRETER-REOEPTACLE AND MECHANISM FOR MAKING Continuation of application Serial No. 695,425, filed. May 6, 1912.

- Serial No. 772,121.

T 0 all whom it may concern:

Be it known that I, FRANK L. KINGSTON,

a citizen of the United States, residing at- Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Garbureter-Receptacles and Mechanism for Making Same, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to carburetors and has for its main object the simplification of the construction and the cheapening of the cost of manufacture of such devices.

More particularly the objects of the invention may be stated as: the provision of a v device of this nature wherein the parts are manufactured so far as possible of metal which 1s stamped or drawn into shape 1nstead of being cast, thus avoiding the moss sity of tedious and expensive lathe work;- the provision of a fluid receptacle or reser-; voir for this type of devices of great lightness and absolute proof against leakage; the

provision of a carbureter having a fuel reservoir of annular form 1n Much the reservoir is made of a slngle p1ece of sheet metal stamped or drawn into shape; the provision of a new and improved mechanism for form-' ing a double walled annular vessel of the type herein specified; the provision of a new and improved inlet or float valve; while; further objects and advantages of my 1nvention will become apparent in the course of the following descriptlon and claims.

In so far as concerns the articles herein. described and claimed, the subject matter of this application is common to that of my; earlier copending application filed May 6,. 1912, Ser. No. 695,425, and to that extent the present application is a continuation of the; former case; the process of forming the receptacle described herein and in my former application, is now disclosed in apatent-application for the first time,

Generally speaking, my invention may be defined as consisting of the vcomblnatlons of. parts and the successive manlpulations de fined in the claimshereto annexed and illustrated in the drawings accompanying and forming a part hereof, wherein:

Figure 1 is a vertical, central, cross-sectional view through a carbureter constructed in accordance with my invention; Fig. 2 is a perspective view of the completed reservoir Specification of Letters Batent.

Patented July 18, 1916. This application filed June 6, 1913.

ated upon; Fig. 6 is a view similar to Fig. 5. showing the position of the parts after the blank has been operated upon to produce the article illustratedin Fig. 3; Fig. 7 is a perspective view of a portion of the float showingthe pivoting and valve operating means; Fig. 8 is a perspective View of the bracket by which the float is pivoted; and Fig. '9 is a perspective view of the clip whereby the float pivot is held in engagement with the bracket.

Reference to the drawings will show that my improved carbureter comprises an annular fuel reservoir made from a single piece of sheet metal and having concentric cylin: drical walls connected together by an integral bottom, the inner wall defining a carbureting chamber wherein the fluid fuel is mixed with air, and one portion of the outer wall being bulged or expanded for the reception of the valve mechanism whereby a constant level of liquid fuel is maintained in the reservoir. The inner wall of this receptacle is indicated at 1 and the outer wall at 2. The lower end of the wall 1 merges with a downwardly flaring portion 3 which in turn j merges with the upwardly flaring portion 4,

the latter portion being connected at its upper. edge with the wall 2. The height of the wall lis preferably somewhat greater than that of the wall 2 as illustrated in Fig. 1.

The wall 2 is preferably swelled or bulged outwardly at one point in its periphery so as to produce a hollow protuberance 5, this protuberance having an integral, substantially horizontal bottom 6, which is punched with a circular aperture for the reception of the fluid supply connection. This connection may conveniently consist of a threaded member 7 traversing this aperture and having a peripheral flange 8 at its upper end, and also provided with a lock nut 9 whereby it is secured in place. This memher is formed with a longitudinal bore 10 having its upper end flared or otherwise formed as a valve seat, and having its lower end formed for the reception of a nipple 12 adapted to be secured to the member by a gland 13. Secured in the protuberance 5 is a U-shaped bracket illustrated in perspective in Fig. 8, said bracket comprising a flat bottom plate 14 having an aperture 15 adapted to receive the body of the member 7 and having at each side an upright arm 16 formed at its upper end with a vertical notch 17. The plate 14 is clamped against the bottom 6 of the protuberance by the lock nut 9, and in addition the parts 6, 7, 8, 9, and 14 are preferably sweated together with solder. sides of the arms 16-16 is preferably the same as the interior width of the protuber- Surrounding the inner wall 1 of the reservoir is an annular buoyant body 20 of cork or of other suitable material, said body having secured to its upper surface at one side the laterally projecting arm illustrated with particularity in Fig. 7. This arm comthe forward end whereof is seen at 29, and

this forward end is likewise formed with a slot registering with the slot 25 and a recess registering with the recess 26. The rear ends of these plates are secured together by suitable means, such as rivets 30, and the whole is secured to the float by means of a staple 31 extended through the body of the float as shown in Figs. 1 and 7.

The projecting ends of the plates 21 and 28 are spaced apart vertically so as to form an attachment for the movable member of the inlet valve, said movable member com prising a stem 33 having at one end a conical head 34 adapted to enter the upper end of the bore 10 and having adjacent to but spaced from the other end an integral spherical enlargement 35. The diameter of the stem 33 is somewhat less than that of the enlargement or recess 26 and not greater than the width of the slots 25, but the diameter of the enlargement 35 is slightly greater than the distance between the nose 24 and the free end of the plate 29-. This construction permits the enlargement35 to be seated in the recesses 26 by thespringing apart of the plates, and be securely retained therein when assembled. The parts can be so designed as to afiord the stem the freedom of movement necessary to its proper operation.

The pivot wire 23 is held in the notches 17 -17 by means of a U-shaped retaining The distance between the outclip 38 illustrated in Fig. 9, the sides 39 39 of which are spaced apart the same distance as the arms 16-16 of the bracket and are provided with tips 4040 adapted to enter the notches 1717 and engage the wire 23. The top of the reservoir is closed by means of a suitable cover 41 also preferably of sheet brass and conforming to the shape of said reservoir, said cover having a peripheral downturned flange 42 adapted to overlap the upper edge of the wall 2 and of the protuberance 5. The middle portion of this cover is embossed upwardly by a slight amount, as shown, so as to be engaged by the lower face of a split ring 43 whereby it is held in place. The upper end of the wall 1 is outwardly flared as shown at 44, and the inner wall of the ring 43 is inclined complementarily thereto so that when the ring is constricted about this wall it is drawn downwardly against the top of the cover 41 which is thereby securely held in place. The inner surface of the cover is also arranged to engage the clip 38 so as to hold the same against displacement. center of the cover is formed with an. aperture 46 of sufficient size-to pass over the flared portion of the inner wall, the face of the ring 43 forming a closure for this opening. The ring 43 is also preferably formed to engage the throttle valve casing 45, but inasmuch as the particular nature and construction of this casing and the throttle valve is not a part of the present invention, an extended description of the same is believed to l be unnecessary.

Within the wall 1 is located the carbureting chamber, the lower end of this chamber being provided with suitable air-admitting and regulating devices and the wall of this chamber being provided with a nozzle member 50 communicating with the fluid fuel reservoir hereinabove described. Tn the present embodiment said nozzle member comprises a cylindrical tube mounted in this reservoir in an angular manner, the side of the tube being parallel to the bottom 3 and the outer end of the tube projecting substantially normally through the bottom portion 4. A suitable regulating valve 51 may be threaded into the outer end of this tube, and the tube may have a connection with the interior of the reservoir by suitable lateral apertures, as illustrated.

The air admitting and regulating devices are indicated generally at 52, but their specific construction and mode of operation is not a part of the present application, being fully described and claimed in the parent case hereinbefore referred to. In fact the fuel reservoir disclosed and claimed herein is not restricted to use with the particular air inlet and control devices, or with the exact discharge nozzle eXpedient-s herein illustrated, and I do not desire this illustration The and description to limit me to this construction or arrangement, having shown the same solely for the purpose of illustrating one suitable method whereby my improved fuel reservoir may practically be employed. Any suitable or convenient arrangement of carbureting chamber may be used Within the scope of my invention.

Whatever the arrangement of the operating parts of this chamber, the same is preferably constructed as a tubular chimney member having a cylindrical portion 53 fitting closely within the wall 1 and having an inclined portion 54 at its lower end adapted to be drawn against the bottom portion 3 of the receptacle. The chimney member is preferably secured in place by having its upper end flared outwardly as at 54 so as to overlie the similarly flared portion 44 of the wall 1. The variousadjuncts of the carbureting chamber can be secured to this chimney in any manner desired without the necessity of perforating or operating upon any part of the reservoir.

As before stated the reservoir of my improved carbureter is made from a single piece of sheet metal and the mode of forming the same as well as the article itself is a portion of the present invention. In the process of forming this reservoir the metal sheet is first subjected to pressing and drawing processes which form the blank illustrated in Fig. 4. This blank consists of a central hollow boss having a substantially cylindrical wall 1" and provided at its lower end with an integral outwardly and downwardly flared portion 3 which merges with an upwardly and outwardly .flared portion 4 the latter terminating in a fiat laterally extending flange 2 The flange 2 is circular excepting for an elongation 5 at one side and the central boss generally has its upper end closed by a web, as shown at 60. A description of the particular method of forming this blank from the original metal sheet is believed to be unnecessary to this application from the fact that the same was within the common knowledge of die-makers and metal-workers prior to my invention.

Comparison of the blank shown in F ig. 4 with the completed article illustrated in Fig. 2 will show that the wall 1* and portions ,3 and 4 correspond almost exactly with the portions numbered 1, 3, and 4,.in the completed article, while the flange 2 operates when properly treated to form the outer wall 2, the extension 5 affording the metal necessary to the production of the protuberance 5.

The blank shown in Fig. 4, is placed in a punch-press between dies of the shape shown in Figs. 5 and 6. In these views, the fixed die member is illustrated at 61 and has an upper flat surface 62 and an un-' wardly opening substantially cylindrical cavity 63 opening through that surface, the depth and diameter of the cavity being equal to that to be given the outer Wall of the reservoir. One Wall of this cavity is also formed with a lateral recess 64 having the exterior shape desired to be given to the protuberance 5.

'Rigidly mounted in the center of this cavity is a cylindrical block 65 Whose external diameter is the same as the internal diameter of the finished inner wall of the vessel. Slidably fitting in the annular space between this block and the wall of the recess is a supporting ring 66, the upper face of which is shaped to conform to the portions 8 and 4 of the blank as clearly shown in Figs. 5 and 6. Reciprocating rods 6767 are secured to this ring and project downwardly through suitable apertures in the bottom of the die member 61 where they engage the sliding head 68. Beneath the sliding head 68 is the fixed head 69 rigidly secured at-a fixed distance from the stationary die member, the space between these heads being filledby a soft rubber block 70. In the present embodiment, the fixed head 69 is adjustably secured by means of a nut 71 to the lower end of a depending bolt'72, the upper end of which passes through a suitable aperture in the die member 61 and engages the cylindrical block 65. This bolt,

therefore, performs the function of securing the block 65, supporting the head 69, and guiding the head 68 which is loosely sleeved thereon. It will be obvious, however, that other expedients could be employed for securing the head 69 and for guiding the head 68. Also, possibly,that the rubber block 70 could bereplaced by a spring or air cushion, although I have hitherto found the rubber block more satisfactory in practice.

The movable die member is indicated at 75 and is secured to the reciprocating plunger 7 6 of the press in any suitable manner.

The exterior of the die member 75 is shaped conformably to the interior vof the vessel, suflicient space being given between its surface and that of the cavity 63 for the thickness of the walls. The member 75 is also formed with a downwardly opening recess 77 adapted for the reception of the hollow boss 1 of the blank, and the depending face of this die member is shaped to conform to the portions 3 and 4 of the blank, as shown in Figs. 5 and 6. One side of the die member 75 is formed with a laterally projecting extension 78 alined with the recess 64 and adapted to cooperate therewith in forming the protuberance 5.

Surrounding the movable die member and shaped to conform substantially thereto while affording the necessary operating clearance, is the annular holding member 80, the same having a fiat face adapted to coop r te with the upp r face 62 of the fixed die member 61, and being secured in any suitable or convenient manner to the presser foot 81 of the punch press.

In the formation of the receptacle, the blank illustrated in Fig. at is mounted upon the fixed die member as illustrated in Fig. 5 with the portions 3 and 4: of the blank engaging the upper face of the ring 56, the flan e portion 2 of the blank overlying the upper face of the fixed die member, and the boss 1 in alinement with the block 65. The securing member 80 is then depressed by the adjustment of the presser foot 81 so as to engage the flange 29 with a firm frictionacontact. The reciprocating member 76 of the press is then caused to be depressed, carrying the die member 7 5 downwardly upon the portions of the blank therebeneath. The coaction of the ring 66 and the end of the movable die member 75 supports and secures the portions 3 and 4 of the blank,

preventing the deformation or tearing of the same, the downward movement of the ring 66 being opposed by the rubber block, which is compressed longitudinally and distorted laterally as illustrated in Fig. 6. The flange 2 is drawn downwardly into the recess 63 and caused to assume a cylindrical form having been meanwhile withdrawn in large part from beneath the member 80. A narrow irregular lip 2 is, however, left at this point and is subsequently sheared away. In fact the shearing away of the lip 2 is preferably accomplished with the same operation with the knocking out of the web 60 and the punching of the aperture in the bottom 6 of the protuberance 5.

The blank illustrated in Fig. 4C is usually esteemed complete for the purposes of the operations herein described before the boss 1 has been made truly cylindrical. Even the boss 1 herein shown generally requires several operations for its production, frequently with intermediate heat-treatment or annealing of the metal. Accordingly when it is delivered to the press for the performance of this process, the corners are sometimes rounded away as illustrated at 85 in Figs. 4: and 5. It is obviously possible to complete these corners simultaneously with the formation of the outer wall and thus dispense with extra operations upon the blank itself. Also, while I have described the operation of turning up the outer wall of this receptacle as complete in a single step, I do not confine myself thereto. It is frequently found desirable, and in fact 'is generally the custom, to break up the process into two steps, the die members for the two steps being exactly the same excepting that the corners and angles of the dies employed in the first step are rounded off and obliterated to some de ree so as to avoid any such sudden bending of the metal therearound as would serve to tear or shear the same. The dies for the second step have sharp and exact edges which bring the metal exactly to the proper shape. In fact, the dies for the step may be old dies which have been employed for the second step so long that the edges have become worn and rounded.

It will be obvious that the process herein described may be employed for the production of other articles than the specific carbureter reservoir herein described. It is not believed that said carbureter reservoir can, in the present state of the art, be made in any other manner than that here disclosed; although if the progress of invention should disclose other modes of making the same, I esteem that the claims herein contained will still protect said reservoir as an article of manufacture irrespective of its mode of manufacture. I am aware that changes in point of detail may be made in this reservoir andin the valve accompanying the same, and such changes and modifications I esteem within the scope of my invention so far as they avoid the prior art. My experience indicates that the permissible variations from the herein disclosed process of making the ame are very slight, but such variations as shall hereafter be discovered I esteem within the scope of my present claims so far as the prior art is avoided.

Having thus described my invention, what I claim is:

1. An annular vessel drawn from a single piece of sheet metal, said vessel having an inner cylindrical wall, an outer cylindrical wall substantially concentric with said first wall, and an integral bottom connecting said walls, said bottom having flared or frustoconical portions angularly related to each other.

2. An annular vessel of drawn metal, said vessel having an inner cylindrical wall, an outer wall substantially concentric with said first wall, and an integral bottom connect in said walls, said outer wall having at one side a hollow protuberance integral there with for the reception of a float valve.

3. An annular vessel formed from a single piece of drawn metal without seams. said vessel having an inner cylindrical wall, an outer cylindrical wall, and an integral bottom connecting said walls, said outer wall having at one side a hollow laterally projecting protuberance integral therewith, the bottom of said protuberance being flat and apertured.

4. A vessel formed from a single piece of sheet metal, the central portion of the sheet being drawn upwardly to provide an inner cylindrical wall and the marginal portions being drawn upwardly to provide an outer cylindrical wall, the inner wall being higher than the outer wall and formed for the attachment of cover securing means.

5. A. vessel formed from a single piece of sheet metal, the central portion of the sheet being drawn upwardly to provide an inner cylindrical wall and the marginal portions being drawn upwardly to provide an outer cylindrical wall, the upper end of the inner wall being flared for the reception of a clamping ring whereby the cover is held in place.

6. A vessel formed from a single piece of sheet metal, the central portion of the sheet being drawn upwardly to provide an inner cylindrical wall and the marginal portions being drawn upwardly to provide an outer cylindrical wall, and a portion of the outer wall being bulged outwardly to form a hollow protuberance.

7. A vessel formed from a single piece of sheet metal, the central portion of said sheet being drawn upwardly to provide an inner cylindrical wall and the marginal portions being drawn upwardly to provide an outer cylindrical wall, and the portion connecting said walls being bent first downwardly and then upwardly to form frusto-conical attaching portions.

8. Mechanism for forming an annular metallic vessel having spaced cylindrical walls and an integral bottom, said mecha nism comprising the combination, with a fixed die member having therein a recess corresponding in shape and size to the outer wall of said vessel, of a movable die member corresponding in shape to the interior of said vessel, a supporting ring mounted in said recess and adapted to engage the portion of the blank between the inner and outer walls which is to become the vessel bottom, means for supporting the interior wall of the vessel during the operation of. the dies, means for clamping the edges of the blank, and means for yieldingly opposing the advance of said supporting ring.

9. Mechanism for acting upon a ductile metal blank having a central cylindrical boss and a laterally extending portion integral therewith, so as to form an annular vessel having spaced cylindrical walls connected by an integral bottom, said mechanism comprising a die member having a recess adapted to receive said boss and an end adapted to engage the region of said laterally extending portion adjacent to said boss, the sides of said die member being of a shape and size conforming to the interior of the vessel to be made, a second die member having a cavity therein conforming in shape and size to the exterior of said vessel, said second die member having a flat face, a fixed block in said cavity and adapted to project into the interior of said boss, an annular clamping member adapted to secure against the face of said second die member the marginal portion of said blank, a supporting ring in said cavity and surrounding said block, means for holding said supporting ring against said blank with a yielding pressure, and means for moving one of said die members relatively to the other die member so as to draw the marginal portion of said blank into said cavity.

10. Mechanism for acting upon a ductile metal blank having a central cylindrical boss and a laterally extending portion integral therewith, so as to form an annular vessel having spaced cylindrical walls connected by an integral bottom, said mechanism comprising a depressible die member having a downwardly facing recess adapted to receive said boss and an outer wall conforming to the interior shape and size of the outer wall of the finished vessel, the lower end of said depressible die member conforming to the shape of the blank, a fixed die member havinga fiat upper face and an upwardly opening cavity therein conforming in shape and size to the exterior of the completed vessel, an annular clamping member surrounding said cavity and adapted to clamp the marginal portion of said blank against said face, a fixed block in said cavity and adapted to project into said boss, a supporting ring in said cavity and surrounding said block and shaped complementarily to the lowermost end of said depressible die member, reciprocable rods secured to said ring and depending through said fixed die member, a fixed header spaced beneath said die member, a soft rubber block on said'fixed head, a slidable head on said block and engaging the lower ends of said rods, and means for depressingsaid first die member into said cavity against said ring.

In testimony whereof, I hereunto affix my signature in the presence of two witnesses.

FRANK L. KINGSTON.

Witnesses:

BRENNAN B. Wnsr, JOHN B. HULL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

Images