US1507968A - Measuring bowl - Google Patents

Description

Sept. 9, 1924. A

' R. R. JOHNSON MEASURING BOWL Filed March 31 1922 Patented Sept. 9, 1924.

UNITED STATES RICHARD R. J CHNSON, OF GREAT FALLS, MONTANA.

MEASURING BOWL.

Application filed March 31, 1922. Serial No. 548,519.

To all whom it may concern: v

Be it known that I, Brennan R. JOHNSON, a citizen of the United States of America, and a resident of Great Falls, Cascade County, Montana, have invented certain new and useful Improvements in Measuring Bowls, of which the following is a specification.

This invention relates to certain improve ments in measuring bowls and the like; and the nature and objects of the invention will be readily understood by those skilled in the art in the light of the following explanation and detailed description of the accompanying drawings illustrating what I at present consider to be the preferred embodiments or mechanical expressions of my invention from among various other forms,

arrangements combinations and construe.

tions within the spirit-and scope thereof.

The invention pertains and is applicable generally to bowls and containers employed in the arts for measuring and mixing various materials, and ingredients, as well as for other purposes, but isparticularly directed and applicable to the types of bowls used in dentistry for mixing so-call'ed investment materials. In the practice of dentistry it is necessary to prepare various mixes from investment materials for use in carrying out certain dental work. Atth'e present time flexible rubber bowlsare in practically universal use by dentists for mixing investment materials and for similar purposes, as well known to those familiar with the practice of dentistry. These rubber' mixing bowls are formed of a degree of flexibility to permit of their being flexed orcompressed to break up and remove any materials or mix which has become hardened therein, yet the bowls have suflicient stiffness or rigidity to normally retain their proper shape and form as bowls.

In the usual method followed in preparing a mix in one of these rubber bowls, water,

for example, is first poured into the bowl in what is estimated to be the necessary quantity to properly prepare the desired amount and character of mix, then, the plaster or other investment materials to be used are placed into the bowl in what is estimated to be the properv quantity, and the contents of the bowl are then stirred with a s atula or other suitable instrument, until the materials are properly mixed. Now, with theuse of mixing bowls of the type referred to, the quantities and amountsof the materialsplaced therein to preparea desired mix are necessarily roughly estimated or guessed at, as there are no guides or indications by which the user can gauge or measure the quantities of the material being placed or poured into a bowl. Experience has shownthat the usu'altendency in'plaoing -materials in a bowl to prepare a mix is to over estimate the amount or quantity of the y PATENT oFFIiCEQ material, so that the resulting mix is usually more thanrequired and waste results. v

lVith the use of the expensive investment materials essential in cast metal inlay work, it is readily seen that the waste resulting from preparing excessive quantities of a mix will in the aggregate amount to a considerable loss and expense.- Further, the preparation of mixes with the referred to';'

type of bowl by the foregoing method dependent upon rough estimationand guess,

results in a lack of uniformity in the mixesso prepared and a natural decrease in the' i quality and character of the work utilizing and based upon such mixes. It follows from the foregoing specific mixing bowl problem encountered, in the practice of dentistry, that in other arts and with the use generally of bowls for mixing purposes this problem is present where it is necessary to place materials in a bowl without any guide or indication by which the quantities and amounts can be measured. 1

Therefore, one of the main objects of-the present invention is to provide a mixing bowl or container so constructed and arranged as to overcome the aforementioned problems by forming the bowl with permanent markingsand indications incorporated in and forming a part ofthe body of the bowl to provide 'graduations by which the quantities of material placed can be readily and rapidly gauged or measured. 7 A. further ob 'ect of the invention is to provide a measuring bowl formed of elements having different appeals to the eye, so arranged and combined in assembled bowl forming relation as to provide a series .of permanent indications or graduations in the bowl by. means of which material can be measured therein to therequired quantity.

A- further objectof-the invention is to provide a flexible rubber or analogous material bowl, formed from superposed rings and bands of diflerently colored material arranged in contrasting colored relationship in the bowl to provide a series of permanent graduations within the bowl by means of which a user can readily measure or gauge the quantity of material placed into the bowl; and to provide a bowl so formed in which the desired flexible characteristic is retained without detracting from. the durability or life of the bowl, or from the permanency of the gradutations tormed'therein.

A further objectof the invention is to provide a mixing and'measuring bowl'having a series of circumferential graduations around the inner surface of the bowl and incorporated in and forming a part of the body of the bowl, so that in using the bowl these graduations provide a gauge by means of which the quantity or material placed therein can be measured to that'required for the particular purpose for which the material is intended.

A further object of the invention is to provide a method of forming flexible-rubber measuring bowls from a series of rings and bands of dilierently colored rubber to obtain a series of permanent indications for graduations in and forming a part of the body of the bowl.

With the foregoing and various other objects in view, which will be readily recognized and appreciated by those skilled in the arts involved, the invention consists in certain novel features in constructions and in arrangements and combinations of elements, as more fully and particularly set forth and specifiedhereinafter.

Referring to the accompanyingdrawings:

Fig. 1 is a perspective view of a measuring bowl formed'in acc'ordance'with the present invention.

Fig. 2 is a vertical transverse section through a measuring bowl of the form and construction of Fig. 1.

Fig. 3 is a view in vertical section of the elements of a bowl of the form of Fig. 1, the elements being shown in their proper relative positions for assembly and formation into a bowl by the method of the in vention.

Fig. 4c is a vertical section through another form of bowl embodying the invention.

Figs. 5 and 6, are vertical sections of other forms of bowls embodying the invention. r

In the accompanying drawings, I have illustrated the invention as applied to and forming measuring bowls of the flexible rubber'type employed by dentists for mixing investment materials, due to the fact that the problems solved by the invention are encountered in an exaggerated form in such types and material of bowl and serve to more clearly illustrate andbring forth the invention and the problems overcome thereby. However, it is not intended to limit the invention to the types of bowl illustrated and described herewith purely by way of example, as it will be readily apparent to those skilled in the art that the invention'is applicable to mixing bowls and containers generally where it is desirable to her so that in effect circumferential lines forming indications or graduations 14,

15 and 16 are provided around the inner' surface of the bowl between the adjacent abutting and joined edges of the contrastingly colored base and bands of which the bowl A is formed. In the illustratedexv ample, the base 10 and bands 11, 12 and 13 are formed from rubber of two colors and s are arranged in alternate relation to form the bowl, that is a band of one CO1OI.'Of

rubber is superposed upon'and joined to a band of the other color rubber and this is carried out so that the bands "forming the bowl are alternately of different and contrasting color to the'color of the bands respectively adjacent and :joinedthereto. In

the present instance, red and'black rubber are used, rubber of'these two COlOI'S bQIDg common and in universal commercial use as well known in this art, and the bowl :base '10 is formed of black rubber, .theband '11 superposed on and joining the base 10 formed of red rubber,the next band 12 is blackrubber, and the top or'upperband 13 is ofred rubber- Thus, the arrangement of alternatelyjoining black and red bands ofrubber to form the bowl A, provides the inner circumferentialindications or graduations 14, 15 and 16 at diiferent levels or depths within-the bowl at the abutting and joined edges of the contrastingly colored bands.

In this manner the bowl A. is-iormed with permanent graduations incorporated in and forming a part of the body of the bowl by means of which thequantity of material placed therein can'be gauged.

A'flexible rubber measuring bowl of the type above described, can be-formed by: preparing the base 10 and bands 11,12 and 13 of thedesired difterent'colored unvulcan-ized rubber, then assembling 'the'base andbands in proper bowl forming andcontrastingly colored relation, as shown in Fig. 3 ofthe drawings. The shape ofthe bowl can be formed as desired by the diameter and'curvature given the base and bandsof which readily apparent. .After the baseand bands are in proper relation they are superposed with the adjacent edges abutting and placed in a suitable vulcanizing form or mold and there VtllCfllllZECl' together to provide the integral, one-piece bowl body in which the graduations 14, 15 and 16 are permanently incorporated in and form a part of the bowl body. I

Another form of the invention is illus: trated in Fig. 4, in which the base 10, and

the bowl forming bands 11, 12 and 13 are formed of one color of rubber and have the thin xfiat rings 17, 18 and 19 interposed.

therebetween, respectively. I

I The rings 17, 18 and '19 are of a width equal to the thickness of the. bowls with their inner peripheral edges flush with the inner surface of the bowl and forming circumferential graduations or lines around the inner surfaceof the bowl. In this form of the invention the bowl B is formed by vulcanizing the bands and graduation rings together, so that the rings form and become an integral permanent part of the'body of the bowl. An effective color scheme for the bowl B is to form the base 10, and bands 11, 12 and 13 of black rubber, and the graduation rings 17, 18 and 19 of white rubber, as shown in the drawings, so that the black rubber of the base and bands provides a background for the white rubber rings. I

In Fig. 5 of the drawings, another form and embodiment of which the invention is capable is illustrated. In this form a bowl C is composed of a one-piece flexible rubber body 20, which is provided with circumferential grooves in the inner surface of the bowl body 20 at difierent depths or levels therein, and the ring or the like inserts 21, 22 and 23 are placed in the grooves and vulcanized therein to form the graduations or lines integral with and forming a permanent part of the bowl body. In the illustrated example of this form of the invention,

' the bowl body 20 is formed of black rubber and the rings or graduation forming inserts 21, 22 and 23 are formed of which white rubber, as clearly indicated in Fig. 5.

The form of measuring bowl D embodying the invention and illustrated in Fig. 6 of the drawings, comprises the one piece bowl forming body 24 in which graduation lines 25, 26 and 27 are formed around the inner surface of the bowl at different levels therein. Inv this form of bowl the lines 25, 26 and 27 may be placed on' the inner surface of the bowl by suitably discoloring the material of which the bowl is formed, or where molded or the like from plastic material the graduations lines may be formed thereon in the process of forming the bowl.

As illustrated, the bowl body is formed of black material and the graduations are formed thereon as a white color-toclearly stand outagainstthe block of the inner surface of the bowl body.

I here the invention isembodied in and provides a flexible rubber bowl of the type employed in, dentistry for mixing investment and the like materials, the graduationsformed in the bowl provide a means by."

which the materials to prepare a mix can" be measured thereinto nsure the necessary amounts for the required mix withoutwaste'" of material through rough estimation orguess as to the quantities of the: material placed therein. .In each instance,.-the.user will know the required amountslwh icl should "be placed in thebowland the particular graduation formed in the boWl by which each amount is determined or measured, so that it merely becomes necessary to place the materials in the bowl to the proper graduations to prepare the required mix.

expensive waste of investment and like'ma- It is thus clear, that by the use of the graduated bowls of the invention, the

come and a uniformity and standardization of the mixes prepared results. I Further, the

flexible bowls embodying the invention re tain the required fiexibilitybut without impairing or detracting from the permanency of the graduations bybreak1ng,crack1n or in wear and use of a bowl, as the gra uations are incorporated in and form an integral part of the body of they bowl and have a life and effectiveness equal to the life of the bowl.

The various features of the invention can be applied generally to mixing bowls, containers and graduates employed in the arts and are not limited to the flexible rubbertype, as they are equally applicable to othertypes and materials, particularly in bowls or containers subject to the action of great wear and of corrosive action of the materials used therein. The number and arrangement lie of the bands and rings forming the graduations is not limited to the illustrated bowls,

nor are the colors illustrated an essential. feature of the invention, as any number, ar-

rangement or colors may be utilized without stepping beyond the limits of the invention.

If desired the contrasting -colors ,may not' be employed, but instead the graduations may be formed by bands or rings having differently formed surfaces to provide the broadest manner :legeill y possible, what I claim is 1. A measuring bowl including a series of superposed rings of contrasting colors joined together-to form the bowl, the joined edges of said contrastingly colored rings forming a series *ofgraduations with n'the bowl.

2; A flexible measuring bowl provided with gradualtions' formed by separate elements incorporated in and forming an integral part of the bodyof the bowl.

3. A measuring bowl including a series of rings of contrasting colors, thesaid-rings superposed in -registration With their adja- '-cent edges 'zibutting and joined "together to form a substantially integral one-piece bowl structure.

4'. A flexible'ineasuring bowl including a series of rings superposed in zilinement' with their edges abuttingand joined together, *the joined edges" of said ringsproviding it-series of "circumferential graduations around the "inner surface of the bowl.

"'5. A fieirilolerubber mixing :bowl including a series ofcontrasting1ycolored rubber theinnersurface 'of' the bowl.

rings superposed with their adjacent Fri-but- -ting edges secured togetherto form 'a onepiece bowl, the said *co'ntrastin'gly colored rubber rings forming a :series of 'circum- 'ferentia-l gr-aduations therebetWeen Iar'ound 6. A flexible rubber measuring ""bo'wl formed of a base, and a series of rubber rings superposed thereon and having-their adjacent abuttingedges vulcanized together "to'provide a one-piece bowl,the-said-rings contrastingly colored whereby the bowl is divided into a-Series of depths indicated at c the merging of 'the'color of*the rings with the colors of the rings adjacentfthereto;

respectively.

7. In "a measuring bowl, a series of ringlike "elements having different visual :ap- *pe2ils,; the ,said' elements superposerl' in registration and joined together to form substantially integral one-piece bowl walls,

and "the "said elements of different isual appeals so joined forming a series :of 1 gra'duations 1n and on- 'the bowl walls.

' RICHARD JOHNSGN.

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