US1445290A - Means for causing registration of rontgenographs - Google Patents

Description

Feb. 13, 1923.

A. W. BUCK MEANS FOR CAUSING REGISTRATION OF RNTGENOGRAPHS Filed Jan. 14, 1921 Patented Feb. 1.3, 19...?3.

sra'rss PATENT VI. BUCK, OF ST. LOUIS, MISSOURI.

MEANS FOR CAUSING REGISTRATION OF BbNTGENOGBAPHS.

Application filed January 14, 1921. Serial No. 437,346.

To aZZ whom it may concern:

Be it known that T, ARTHUR W. BUCK, a citizen. of the United States, residing,I at the city of St. Louis, in the State of l issouri, have invented certain new and useful Improvements in Means for Causing Registration of ltontgenographs, of which the following is a specification.

: This invention consists of a method of doubling or multiplying the intensity or density of the lines and other parts of an- X-ray photograph or rontgenograph and an instrument for practicing that process. It may be used in connection with dental X-ray films or any others.

As now constructed, the best dental-film packets contain two pieces of film material. This is now only for the purpose that one photograph may be given to the patient and the other retained by the dentist. Such packets can be made and used with three or more films therein, if desired, and for the practice of the method herein described and for the purpose herein mentioned such pluralization will be desirable in some 1nstances, as, for instance, for cases where it is found particularly difficult to obtain a clear picture.

in the accompanying drawings forming part of this specification, in which like numbers of reference denote like parts wherever they occur,

Figure 1 is a front elevation;

Figure 2 is a side elevation of an instrument for practicing this method.

In the present construction of dental X-ray film packets, the plurality of pieces of film therein are in registration with each other. Therefore, when a photograph is made, it is not only the same on each film, and not only are the same in registration with each other, but they are capable of being realined, so as to register with each other again.

When two or more underexposed or underdeveloped films, which would ordinarily possess little, if any value, are thus returned to exactregistration together, the intensity or density and, therefore, the visibility of the detail and contrast of the rontgenograph is multiplied when held between the eye and the light for examination.

he underexposed or underdeveloped rontgenographs are given a utility and value thatthey would not otherwise possess, obviating at least the time, delay, trouble, and

expense of retaking and, in many cases, rel eving from the necessity of summoning the patient for another engagement.

The use of this process and instrument is useful even in the case of rontgenographs of good quality, as thereby even their showmg is improved and greaterclearness is ob-. tained'with respect to the details of the structure of specially delicate tissues. This method or process consists in the reregistration of films for the purpose above described, which reregistration must necessarily be exact, and viewing the same by transmitted light,

The instrument illustrated in the draw' ings combines the functions of enabling the said necessary accurate rcregistration of the rontgenographs; their eflicient holding in such alinement; their protection from outside reflect-ion or the like; and their convenient handling while being viewed.

This device consists of a handle 1, a frame 2, having the cross-member 3, which underlies and supports the films l and causes their lower edges to aline with each other, thereby producing registration of the pictures that they bear. The side members of this frame 2 force vertical alinemenai of the said lilms and pictures just like the cross-member 3 produces horizontal alineinent thereof.

The films 4 are placed between a pair of pieces 5 and (3 of optically perfect glass, commonly known as optical flats, the same being vertically (as shown in the drawings) slightly smaller than the films 1. This enables pressure with a finger upon the upper edges of the films 4 when located. between the ,1ttSS(-1S 5 and 6; thereby forcing the same to rest fully on their bottom edges on cross piece 3, being guided and held in such movement by the side members of frame 2. The upper edges of the films 1 project slightly above the top edges of the glasses 5 and 6.

Around the outside edge of the glasses 5 and 6 extends an opaque strip or band 7, either enameled thereon or otherwise applied thereto, its object being to eXclude outside reflection and the like.

A spring or a plurality of springs 8 hold the glasses 5 and 6 and the lihns l in place and press the same toward a holding mem her or frame 9, which is attached by screws 10 to frame 2. ecrews 11 fasten springs S to frame An opening 12 through frame 9 permits viewing the liiIltQQ'l'lOQflitlDhS therethrough.

The inner side of eross rnember and of V the side members of frame 9/ are preferably grooveless, as thereby perfect registration is more easily secured.

If desired, a permanent stand or the like may be substituted for the handle 1.

"Having thus described this invention, I hereby reserve the benefit of all changes in form, arrangement, order, or use of parts, as it'is" evident that many minor changes may eemade therein Without departing from the spirit of this invention or the scope of the following claims.

'I claiiiif 1. An instrument of the character described, consisting of a frame and a pair of glasses, a filmpositioned between said glasses and another frame adapted to hold the said glasses from one side and a spring on the other. I f

2'. An instrument of the character described, consisting of a frame and a pair of glasses, a film positioned between said glasses and anetl i'er frame adapted to hold the said glasses rroni one side and a'spring on the other, the said spring and the said last-mentioned frame being attached to the said first-mentioned frame.

3.; An instrument ofthe character describedcomprising a frame, a holding member borne thereby and provided with an opening, optical flats held in the frame by the holding member on one side and arranged in front of said opening, a film between the flats, and a spring to hold said flats on the other side. v

4. Mean-s for causing registration of rentgenegra ihs, including a frame equipped with optical flats, said frame being openon one side for insertion of a sensitized body between the flats, and means to hold the flats inengage'ment with said body.

In testimony whereof I hereunto affix my signature.

ARTHUR W. BUCK.

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