US2196519A - Method of making pressure regulating devices - Google Patents

Description

7 April 1940- G. e. BUDWIG 2,196,519

METHOD OF MAKING PRESSURE REGULATING DEVICES Filed Dec. 21, 1936 00000000000000 000000000000 ooovooooooo INVENTOR. GILBERT G. BUDW/G.

BY 6? ATTORNEYS.

s METHODj or; MAKING PRESSURE i v REGUL A ING DEVICES e 1' Gilbert G. Budw g, Burbank," Calif; assignor-to Budwig Manufacturing Company, Burbank, I 3 Calif., a corporation of California I Application ne em er'zi, 1936,- ser lnu iasiz l g eelims] (01. 291-157") f I v My invention relates to pressure regulating pressure reduction device operating by friction; I 7 devices, and more particularly to a device adapt I to providea means and methodof cleaning small ed for use-in beverage dispensing'devices such as apertures; to provide a means and method of is used for dispensingfbeer or; similar carbonated regulating heat exchange in a device: dispensing 5 liquids; This application is a" vcontinuation-in w carbonated liquids; and to provide a simple and 5 part of my and V. Ray Bemietts prior' applicaefiicient beverage dispensing device for use in tion entitled -Beverage dispensing apparatus,- conjunction with carbonated liquids.

' USerial'No. 91,132, filed July 17, 1936, now Patent Myinvention possesses numerous other objects No; 2,132,011, dated October 4, 1938.. v and "features of advantage, some of which, vt o- 10 In the operation of the" usual apparatus for gether with the foregoing, will be set forth in the 10 dispensing beer or the like, the degree of plesfollowing descriptionot specific apparatus ernsure under which the beverage "is stored is lim- 'bodying" and utilizing my novel method? It is "it'ed by the fact that thevelocity with which it. therefore to be understood that my method, is leaves the dispensing valve determines the charapplicable to other apparatus, and that I do not acter'or appearance thereofin the final conlimitmyselfi'in anyway, to the apparatus 'of the 15 tainer. When beer is dispensed it must be done present application, as I may adopt various other gently so as to avoid excessive turbulence; upon apparatus embodiments, utilizing the method, the degree "of v which depends the resultant within the scope of the appended claims.

head. The ability to retain amaximum head Referri g to the d w depends not only, upon the number" and size v Figure 1 isa plan view ofrny'pressurereduc- 20 of individual gas bubbles formed as a result of tion' device before assembly.' v a 1 Y v a pressure decrease incident to escape from the Figure 2 is a V w p t y Sectidnfind. p y

dispenser, but alsoupon rarity of the opportuniin elevation' showing the'completed pressure .reties offered the bubbles to unite with each other. du i n ev ce in a l n a beve outlet;

Since the number of such opportunities depends H Figure 3 is a d i p t y in S ct on 25 upon the turbulence, it is highly desirable to ndv partlylih elevation, (if-the mp e d pr sw maintain this factor at a minirn'um value. I sure :reductiondevice. v 1. e

For the above reasons, many installations disthe prior application-referredto bo e, we

'pense beer at pressuresin the neighborhood of there described a pressure ct on device -39 seven o'r' ei ht ounds, and thus. t i w formed'by spirally-winding sheet metal around flow of beer from theflvalve. It is desirable to a corathe sh metal s' p eed by bosses utilize higher pressures if. it is also;p0ssible' t0 thereont'g desirable-however, 1 order that dispense without turbulence. uniformity -.oi production be obtained, that ex The" pressure're'duction device which forms a tremely accuratelspaci'ngs betweenthe e -oi v part/of my present invention is of suchv character the windingsv e used,v and, I' hav found that 3 that pressures in the n i hbo w twenty orderto standardize the control ofvarious prespounds per Square inch may be employed with r es a t Spacing have an efiiciency in pressure reduction such that turtolerance of less'ithayn eo h of 6 -r bulence'is substantially eliminated, and-high flow th us ndthsof n nch, between each "layer. I M

40 imaintainei it e v b have found it desirable, ingorder toobtain such 40 I i Accordingly, among thex-obj'ects' of my'invenspacing, to utilize a' pe a -assemb y means and tion are: to provide a beverage dispensing ap 11119011011, a d by lie sof th sineans and method 'paratu5 capab1e of i dispensing under pressure Izhave' been able to completely standardize the with substantially complete pressure. red t 3 production of these1pressure reduction devices. under conditions which substantially eliminate p oadlifi ELStO 1 8 11011. I':'Win'd Sheet metal havturbulence'duringsuch reduction; to provide a s bfl h on in a spiralzaround pressure reduction device which is simple in cona core. In 'doing so -however, I place the spacing structionand assembly andflen'ds itself to ,pro bosses toward the: edge of thesheet and in the duction methods; to providegavpressure'reduction center of the sheetrposition, bef re Winding, 'a device whichlnay be quickly replaced in service; s para sp sheet of ma r a which can o .to provide ameans and method-of obtaining an later be; dissolved out :of the assembly; The; accurate spacing in a pressure reduction device; Wi in is th e or accu e y 1 6 ii e to provide a means and metho'dfl'of accurately vmaking of ,thespiral andthe spacer is later reassembling alpressure:reductioni'device;to promoved. I i

. .vide'a means .for 'maintainingicloseispacings in .a -1'n;- addition; I ;.;have1-:i l is highly 55 Celluloid thousandths of and through the reduction device will behave in substantially the same manner as later amounts.

My present invention may be more fully understood by directreference to the drawing.

A-strip I, preferably of shim stock, and in one" embodiment two-thousandths of an inclrthick, two inches wide, and fifty-two inches long, is providednear each edge thereof withv embossed spacers 2, leaving the'central portion of the strip free from embossing. A spacing ribbon 3; one-- fourth of an inch wide,'in this particular ex-' ample, and three-thousandths of anfincb thick,

is placed along the center of the entire strip, and

in some instances the entire, s -ip may be of or similar cellulose material. ever, in certain instances, I may prefer to utilize a. cellulose ribbon for approximately one-half of the fifty-two inches, and a metal ribbon. i of exactly the same size and thickness for the remainder of the strip, the metal ribbon is to be utilizedbetween the outermost turns of the wound strip. Inasmuch asI prefer to make the embossed spacers 2 fivean inch high, and the spacing ribbons 3 and 4 only three-thousandths of an inch thick, it is obvious that v Wound; under pressure, that the spacing bosses will be reduced to the thickness of the Celluloid ribbons, and thus the spacing is con ribbons, but maintained by and metal trolled wholly by the the bosses. i

In winding the strip I ,with its associated spacing ribbons, I place a core 5, shown in' Figure 3, in a lathe or similar device, and wind the strip, under pressure, on the core. After "the entire spiral is formed I force it into a restrainingshell 6, which is provided at one end with threads 1, a Washer 8 and a knurled knob 9, in order that the device may be inserted in the dispensing" .faucet I 0 wound under Inasmuch as the strip has been relatively high pressure, at least I sufficiently high to reduce the height; of the spacing bosses, it will remain undercitsown pressure in the restraining shell-6, but I prefer, in

order to maintain the relative positions of the various layers, to drill a hole completely through therestraining shell, all layers of the winding, and the central core, and insert arestrainihg pin H in that hole to maintain the complete relative position of the winding.

The assembled device is'now, of course, in- 1 operable, because of the positioning therein of the Celluloid ribbon- The next step, therefore, is theremoval of this ribbon by a heating treatment. The open spaces in the wound core are so narrow that it has been foundimpossible to remove the Celluloid from within the winding by any solvent means. 'I have, however, found that if the assembled windings are placed in an oven and baked at approximately 650 F., the Celluloid is completely cooked'out, leaving no ash within the winding and with only the collection of an ash at both ends of the core.

There is no flame developed nor any explosion.

After the cookingprocess, the ash is removed each .have ascertained that under these tor in the success of the in the glass.

and in thislatter instance regulate the amount of when the strip is I from the ends of the winding and the winding.

is open, and the flow of liquid through the winding is normalas to'volume. However; I conditions, While the volume of carbonated liquid which will pass through the core is normal, the functioning of the device, as far ascontrolling foam is concerned, is not good, and in fact the device will foam excessively.

In order to prevent this foaming,

surfaces of the winding,

through the winding a liquid under high presmild abrasive, such as vent. The accuracy and thoroughness of this polishing and cleaning operation is a major facfinal operation of the cleaning of the layers device. The better the and the smoothing of the surface area in the stock in the winding is made, the higher the beer temperature can be and still be controllable by this device. polished device made as outlined, I have been able to serve beer which is as warm as 70 F. in the barrel and as high as 58 F. when served Obviously, wellabove those normally encountered in practice', and I am thereforeable todispense beer at a higher temperature Furthermore, by thus altering microscopically the surface offthe winding, I can determine and sible to give a glass of beer which is dispensed at a given temperature. I believe this to be entirely novel, and furthermora'this head can be maintained constant range of temperatures andpressures. accomplished without of beer flowing. 7 beer is chilled to a l" F. or less for serving; the ordinary beerudis'penser requires a reduction in delivery volume so that an eleven-ounce glass requires as high as thirteen seconds to fill. At the higher temperature outlined above, I am able to fill the. same glass in six. seconds and atfthe same time maintain the proper head on the beer. i

In describing my method of winding the shim stock to form my in described, I have above-stated that in some instances Celluloid is utilized only for about onehalf of the spacing ribbon and. that the other This is reduction of the volume half may be a metal ribbon 4, and that this metal ribbon is utilized inthe outer turnsof the wind- In the example dimensionally quoted, I pre- H I have found it highly desirable to clean or polish the opposed and I do this bypassing 7 these temperatures are and with a high volume.

head which it is pos- For example, ordinarily. when pressure reduction device here- 1 With a carefully cleaned and over a relatively wide spacing ribbon, the remainder of the fiftyribbon isnot removed and stays in position.

throughout the operation of the device, and therefore efiectively prevents any liquid from passing through the outer'spaces of the Winding. Vi hen the windings'areso made, I have foundthat the first glass of beer'drawn :afterthe faucet has been idle is notnearly so inclined to be wild, as usual, and I attribute thisto the fact that under ordinary" circumstances an idle faucet reaches room temperature and when the first glass. of beer goes through at a lower tempera-,

ture, ready for drinking, that the sudden rise of the temperature in. the sive foaming, In almost'every' prior beer installation, the;first glass. of beer through an idle faucet causes excesthe layers; second,

i under sufficient pressure to the same height as the thickness ofsaid-orr organic ribbon.

faucet is thrown away because it is so wild, or at least, if it is not thrown away, allowed to settle before utilizing a lengthy time first glass.

It is my conclusion, therefore, that the air spaces between the outer layers of the winding act as a heat insulator, preventing the rapid exchange of heat between the main metal body of the faucet and shell of the device, and the beer. The only place that heat can be read-- ily conducted from the outside of the faucet to the beer flowing through the central channels is where the metal as this strip is very narrow, heat conduction to the beer'takes place only through a relatively small metal path. I believe that this point has been l definitely proved by experiments wherein the metal strip 4 was extended the full width of the winding. Under these conditions the device delivers exceptionally fwild beer for the first two or three glasses. By reducing the strip I reduce the wildness to the point where the first glass can be dispensed within a reasonably short time .without excessive foaming.

'I have therefore improved our prior device, first, by accurately controlling the spacing of by. accurately controlling the tendency to foam by polishing and cleaning the layer surfaces in the device; and third, by providing insulating air spaces between the column of beer and the metal body of the faucet.

I claim:

1 In a pressure reduction device having a spirally wound strip in a liquid'conduit to provide closely adjacent friction surfaces, a method" of assembly which comprises providing spacing bosses along the length of the strip, placing an organic ribbon on said strip of lesser thickness than the height of said bosses, winding the strip to deform said bosses ganic ribbon, fixing the winding, and removing the organicribbon material by raising the-temperature of the strip sufficiently to gasiiy said 2. In a pressure reduction device havinga spirally wound strip in a liquid conduit to provide closely adjacent friction surfaces, a method of assembly which comprises providing spacing bosses along the length of the strip, pla'cingan organic ribbon on said strip oflesser thickness than the height of said bosses, winding the strip under sufficient pressure to deform said bosses to the same height as the thickness of said or- 1 ganic ribbon, fixing the winding, removing the organic ribbon material, by gasification thereof and cleaning the opposed surfaces of said winding by passing a liquid therethrough.

3; In a pressure reduction device having a} spirally wound strip in a liquid conduit to provide,

closely adjacent frictionsurfaces, a method-of assembly which comprises providing spacing bosses along the length of the strip, placing an it must be it can be filledup, thus for the filling of the strip 4 is wound. Inasmuch provide a spacing tain a liquid by capillarity therebetween, fixing organic ribbon on said stripof lesser thickness than the. height of said bosses, winding the strip under sufficient pressure to deform said bosses to the same height as the thickness of said organic ribbon, fix'ng the winding, removing the organic ribbon material by gasification thereof, and polishing the opposed passing a liquid containing a fine abrasive through the winding. I I

4, In a pressure reduction device having a spirally wound strip in a liquid conduit to provide closely adjacent friction surfaces, a method of assembly which comprises winding said strip with an organic spacer between the turns thereof to provide a spacingbetween turns of a size to re tain a liquid by capillarity therebetween, fixing the winding, and removing the spacer material by the application of heat to the winding to gasify said spacer. L I

5. In a pressure reduction device having a spirally wound strip in a liquid conduit to provide closely adjacent friction surfaces, a method of assembly which comprises winding said strip with spirally wound strip in aliquidconduit to provide ,closely adjacent friction surfaces, ,a method of assembly which comprises winding said strip with a cellulose spacer between the turns thereof to betweenturns .of a size to rethe winding, and removing the spacer material by baking the winding at a temperature of approximately 650 F 'to gasify said cellulose.

'7. In a pressure reduction device having a spirally wound strip in a liquid conduit to provide closely adjacent friction surfaces, a method of assembly which comprises winding said strip with a cellulose spacer between the turns thereof to provide a spacing between turns of a size to retain a liquid by capillarity therebetween, fixing the winding, removing the spacer material by baking the winding at a temperature of approximately 650 F. togasify said cellulose and cleaning the winding by passing liquid under high pressure therethrough after assembly. I

8. In a pressure reduction device having a spirally wound strip in a liquid conduit to provide closely adjacent friction surfaces, a method of assembly which comprises winding said strip with a cellulose spacer between the turns thereof to provide a spacing between turns of a size to retain a liquid by capillarity therebetween, fixing the winding, removing the spacer material by baking the winding at a temperature of approximately 650 F.,to gasify said celluloseand polishing the winding by passinga liquid containing a mild abrasive therethrough after assembly.

GILBERT G. BUDWIG.

surfaces of the wound strip by l

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