US1099101A - Impression-cup. - Google Patents

Description

L. ROBERTSON. IMPRESSION 0UP. APPLICATION FILED 00T.15, 1910. RENEWED 00131, 1913.

Patented June 2, 191% W'inasees J array UNITED STATES PATENT OFFICE.

LUGIUS ROBERTSON, OF MADISONVILLE, OHIO.

IMPRESSION-CUP.

Application filed October 15, 1910, Serial No. 587,310. Ecnewcd October 31, 1913.

To all 107mm it may concern:

Be it known that I, Looms ROBERTSON, a citizen of the United States, residing at liladisonville, in the county of Hamilton and State of Ohio, have invented new and useful Improvements in. Impression-Cups, of which the following is a specification.

My invention belongs to that class of impression cups used in dentistry to obtain a correct and perfect contour of that part of the mouth to which plates carrying artificial teeth are to be fitted; the invention relating particularly to that part of the art or process by which the impression is formed from which the plaster Paris cast is made, while the impression cup is in the month.

One of the salient and essential features of my invention consists in providing the impression cup with a hollow handle which acts as a trough or funnel for carrying the liquid plaster Paris into the cup when in the mouth of the patient.

Another important feature consists in providing a lip guard in connection with the hollow handle, to assist in forming the funnel for carrying the plaster Paris into the cup and for holding the lip and mustache in a position to protect the same and at the same time present a better opportunity for efficient service.

Another feature consists in making the lip guard. removable and adjustable.

Another feature consists in placing finger holds in the upper cup.

Still another feature consists in making the lip guard adjustable on the handle of the cup.

In the accompanying drawing forming part of this specification Figure 1 is a perspective view of the impression cup for the upper part of the mouth, the lip guard being in place thereon; Fig. 2 is a simllar view with the lip guard removed; Fig. 3 is a perspective view of the lip guard used with the upper impression cup; Fig. 4 is a perspective view of the lip guard used with the lower impression cup, and Fig. 5 is a detached view showing how the lip guard can be made adjustable.

In Figs. 1, 2, and 3, I illustrate the impression cup for taking the impressions of the roof or upper part of the mouth includ ing the upper gums or ridge. I do not illustrate or describe a cup for the lower jaw as it will be readily understood that my invention can be adapted for that part of the Specification of Letters Patent.

Patented June 2, 1914.

Serial No. 798,584.

month by forming the lower impression cup after the style of the upper cup; only adapting it for the lower part of the mouth.

The upper cup is formed as shown in Figs. 1, 2 and 3 having a trough like depression 1, formed between walls 2, 2, and connected by an arch 3, the trough walls and arch are widest at the forward end of the cup and narrowing as they approach the handle 4-, the trough, walls and arch conforming in contour to the upper part of the mouth from which the impression is to be taken. In the outer face of the cup I place finger holds 5, in the trough 1. The finger holds are present so that the finger points will pass up into them so as to hold the cupfirmly in position and to prevent slipping of the fingers. The handle 4 connected to the rear of the cup is hollow having the depression 6 in its face. on each side of the handle I form ears 7 having slots 8 which may pass on tirely through the ears or only appear as re cesscs. The depression 6 in thehandle leads to and meets the trough 1 at its rear part 9, being slightly higher than the trough. The upper gum ridge passes into the trough 1 when the cup is used and the arch 3 fits the mouth roof.

The lip guard is formed like a saddle or hood and is composed of arch 10 with a reinforced edge 12, depending lugs 13, and diverging wings or extensions 14, the wings at their lower edges having recesses 15 which fit ontothe edge of walls 2, at the rear of the cup. The lugs 13 fit into the recesses 8 in cars 7 and together with the recesses 15 on wings 14- hold the lip guard in place. When the lip guard is in position it will readily be seen that a funnel is formed. When I make the lip guard adjustable I form holes 30 in the ears 7 and place pins as 31 in place of depending lugs 13, so as to guard used for upper cup except that its wings 15, 15, are slightly differently formed,

(see Fig. 4), and one is shown as having pins instead of a depending lug.

The impression cups just described are of the usual formation except the hollow handle, finger holds and the lip guard and their peculiar construction and formation in connection with the cups.

I will now describe another feature of my invention.

Along the edge w 50-- (see F ig. 1), I: place soft bees waX, which is pressed into proper formation when the impression cups are put into the mouth; the bees wax thus pressed is chilled and trimmed, if necessary,i thus forming a dam or retaining wall to hold the liquid plaster Paris and keep it; from running into the patients throat.

hen the impression cups are in the mouth the dam holds the plaster Paris in proper position and allows it to flow freely, steadily and uniformly to fill up every crevice, interstice and depression, so as toform a perfect cast; the result thus being the same in a hard, strong mouth or a' spongy, soft and malformed mouth, incident to neglect of the teeth and gums. The; impressions formed by this cup are perfect: and conform technically to the contour of the upper and lower parts of the moutlri The plaster Paris as poured into the funnel; shaped mouth formed by the handle andj lip guard will find its way into the impression cup uninterruptedly without assistance or inconvenience. I may dispense with the lip guard if I so desire. I may use the cups without the dam, if I find it desirable.

While I have explained one specific form of cups I do not wish to limit myself to such specific construction, but I may change, alter and modify the same and still remain within the scope of my invention.

Vhat I claim as new and of my invention and desire to secure by Letters Patent is:

1. In an impression cup of the character described, a cup part, said cup part provided with a trough like handle open at the top.

2. The combination in a dental impression cup of a hollow handle with a removable lip guard, as set forth.

3. The combination in a dental impression cup having finger holds in its face, of a hollow handle.

4. In an impression cup of the character described, a cup part, finger holds depressed in the face of said cup part, as set forth.

5. The combination in a dental impression cup of a handle provided with a lip guard, as set forth.

6. In a dental impression cup, the combination of a hollow handle and lip guard, said handle provided with slotted ears and the lip guard provided with depending lugs, the depending lugs fitting said ears to attach the lip guard to the handle, as set forth.

7. In a dental impression cup, the combination of a hollow handle and lip guard, said lip guard provided with grooved wings which engage the rear part of the cup, as set forth.

8. The combination in a dental impression cup, of a hollow handle, and a temporary dam in said cup, said dam made of a moldable substance for retaining the material poured into said cup, as set forth.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

LUCIUS ROBERTSON.

Witnesses:

H. E. CARsTn-Us, WM. Harmon.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 0! Iatents, Washington, D. 0.

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