US1566198A - Dental x-ray system - Google Patents

Description

Dec. 15 1925- 1,566,l 9 8 w i H D. GARRETSON DENTAL X-RAY sysrEu Filed Feb. 65 1924 sheets-sheqt 1] INVENTQD'R J. 295love Jif y ATTORNEY Dec. 15, 1925- 5 ,19 8

. H. D. GARRETSON DENTAL X-RAY SYSTEM Filed Feb. 6, 1924 2 Sheets-Sheet 2 IIIIIIIIII I INVENTOR Jury/Z firrelf'ia BY I ATTORNEY H may 1:. eam'reox, on NEW Yonx, N.

DENTAL X-RAY SYSTEM.

' Application flea February a, 1934. Serial In. season i of the city,

Be it known that I, HARRY D. Gannn'rson',

a citizen of the United States, and a resident county, and State of New York,

have invented anew and useful lmprovethe following'is a 'specification.

The object of ment in Dental XRay' Systems, of which,

tra'nsformer' ma be put on an arm of a dentist chairv an there clamped and the X- means of a ray tube bevconnected to this transformer by flexible connection which can be handled so that under all circumstances it is possible to take small radiographs without-- inconvenience or danger due to'the'hi' h tential currents em loyed.. This an m er objects are accomp ished by my invention,

some embodiments of which .arehereinafter.

more particularly set forth.

For a more detailed descriptionofmyin-f vention, reference is to be had to the accompanying drawings,

xproved apparatus in use.

vso.

Figure 2 is a diagrammatic'view showing I the electrical'connections andcircuits.

-. tube and the partsw -Figure 4 is a sectional 3, looking in the 'dire'c- Y which is clam tion of the-'arrows;f I

- Throughout the various views ofthe draw L ings 'sixnil -;Figure 3 vi alongitudinalsectionof the view, taken on" th line H of Figuresiml ar parts. "In the preferred embodiment of my invention, a dbntistchair '1has an-a'rm 2 on va suitable transformer; 3 power through wires 4 lar reference characters designate which is supplled by I and 5 which are preferably low potential ,wires joined in a cable 7 The transformer is a small step -1 of this invention shown in Figure 2, power 6 in the conventional manner.

the tube is immersed in oil-10 and .50 arranged and, disposed that X rays may e projected through a funnel 11 and through a patient 12 while held by a dentist '13, as

9 where my invention is to provide v a system of this class'which may housed in the smallest possible space and which may be readily detached and removed when not; in use and" particularly a system in' which a rowin part erm t n" ich enclose it.

r the step up transformer "Volta 'and t e casing, thus reducing the insulation.

sulation required and 18 must be suflicient for twenty thoulvide this. insulation, carefully prep 'sulatin'g material is inserted in two metal a u transformer with high potential wires zw hich pass through a fiexibletube- 7 'to'the X-ray tube 8 in a suitable protecting casing ifcated in Figure 1. In the embodiment is broad enough to cover all structures' th g -lr is supplied through the 4 5 which power runs to the transformer 3 which has a primary Hand a secondary 15 with a milliampere meter 16 at the neutral point and also a ground 17 at the neutral point. Fromthis secondary 2, wires 18 and,

19'are connected to the anode and cathode ofthe tube 8. 1 I

The wire 4 is also connected to a wire 20 which runs to a small rheostat 21 which-is connected' by a wire 22 with the primary 23.,

of'a step 'down transformer 24-which also has a connection w iththe. wire 5, as shown. The secondary 25 of this step down transformer 24 has two wires, .one of which is connected to the wire 19 and the other wire 26 runs to the cathode of the tube& From wire 19cand both' are encased in a .flexible tube28..

of .my improved system wi be readily unagainst the patient. he'rheostat 21 is mampulated until the milliampere meter--16 1 not shown; vThe groundin of the center of uces the effective between the conductors 19-and-18 to half, so that if say forty thousand volts are required to 0 rate the tube 8, the intween the conductors 19 sand volts on each and if this be the case therewill be no shortcircuitingg To ro-- tubes 27 and 28, as above described. The-- be flexed as much as desired." The oil 10 surrounding the tube'8 issuflicient to keep. the terminals Y thoroughly insulatd.

While I have shown and de'scribed one embodiment of my'invention, .it'is obvious G that it is not restricted thereto, but the-tit lead in wires and.

the transformer 3 extend the wires '18 and; 19 and the wire 26 is brought close to the 'tube27 while the wire 18 .isenca ed in a- In view" o f -theforegoin "the operation I derstood. .The cable 6 'isconnected to a 78-9- sw tch, notv shown, and placed in an desired locat on or ad'acentto the trans ormer 3 and the trans ormer is clamped-to an arm 2 and then the pro'ection .111is pressed b y g v d by an 'automatic'switch,"

result is that the tube 7 and its contents m'ayfl i come within the scope of the annexed claims.

Having thus described my invention, what I claim 1s: r

1. In an apparatus of the class described, a transformer, a flexible tube'connected to said transformer, an X-ra tube connected to and carried by said exible tube and means for supplymg the X-ray tube with power'through said flexible tube.

2. In an apparatus ofthe class described, a step up transformer, means for supplying the same with power, a flexible tube connected to said transformer, high potential conductors in the said flexible tube, a casing carried by said flexible tube and at the free end thereof and an X-ray tube employed in said casing" and connected to said high pojtential conductors. I i

3 In an apparatus of the class described,

.2 a step up and ste down transformer adapted to be secure to the arm of a dentlst chair, means for supplying the'transformer with power, means for regulating the cur-.

1,5-ee,1es

rent of the step down part or" the trane former, high potential wires running from said transformer adapted to carry anX-ray generating current and a cathode heating.

current, a flexible tube containing said wires and an X-ray tube connected to said wires and carried by said flexible tube, whereby a hi h potential current may be passed to the tu eand X-rays generated while the tube is supported manually. v v

4;. In an apparatus of'the class described, a step up transformer, a flcxibletube connected to said transformer, high potential I wires passing from said transformer, a

groundfor the neutral point of the step up c011 of the transformerand an X-ray tube connected to said high potential wires at Eh? other end of the tube and carried by this In testimony whereof, I have hereunto set my hand th s 23 day of January, 1924.

, HARRY n. GARR-ETSON. y

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