US404652A - Veterinary mouth - Google Patents

Description

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(No Model.)

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No. 404,652. Patented June 4. 1889.

(No Model.)

2 Sheets-Sheet 2.

C. E. PALMER. VETERINARY MOUTH SJPEGULUls/L Patented'June 4,1889.

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N. PETERS. Plwlo-Lnnogrlpiwr. Washington, D. C-

UNITED STATES PATENTA OFFICE.

CHARLES E. PALMER, OF NEW HAVEN, CONNECTICUT.

v VETERINARY MOUTH-SPECULUIVI.

SPECIFICATION forming part of Letters Patent No. 404,652, dated June 4, 1889.

Application filed March 25, 1889. Serial No. 304,634. (No model.)

To all whom t 77mg/ concern:

Be it known that I, CHARLES E. PALMER, of New Haven, in the county of New Haven and State of Connecticut, have invented a new Improvement in Veterinary Mouth-Speculums; and I do herebydeclare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in-

Figure l, a side view of the speculum complete; Fig. 2, a top view of the same, the jawplate arms turned the one to the right and the other to the left for convenience of illustration; Fig. 3, a vertical central section. Fig. et illustrates the operation of the speculum; Figs. 5 and 6, modifications; Fig. 7, the speculum as in use.

This invention relates to a device for holding the jaws of animals in an open position for veterinary purposes, the object being a construction which may adjust the extent of openingof the mouth, prevent possible accidental closing, and yet leave the mouth fully exposed for examination; and it consists in the construction as hereinafter described, and particularly recit-ed in the claims.

A B represent the two jaw-pieces. These should be made curved, as seen in Fig. 2,001'- responding substantially to the curve of the front portion of the jaw. The jaw-piece Ais pivoted to the end of an arm C and the jawpiece B pivoted to the end of an arm D. The other ends of the arms terminate, respectively, in threaded screws E F, turned toward each other and at right angles to the plane of the jaw-pieces A B. These screws E F are right and left hand and work into the opposite ends of a handle G, which is correspondingly screwthreaded, and so that the rotation of the handle in one direction will draw the two arms C D and the j aw-pieces they carry toward each other, or turned in the opposite direction will force them farther apart, as indicated in broken lines, Fig. 3. The working or the outer surface of the jaw-piecesrshould be cushioned. To do this, as represented in Fig. 3, the jaw- .peces are recessed. upon their bearing-faces and a cushion H, of india-rubber, inserted therein.

To use the speculum, the jawpieces are brought toward each other to the proper extent, the mouth opened, andL the jaw-plates set between the teeth, the jaw-plate B bearing upon one (the lower) jaw and the other plateA bearing against the other (the upper) jaw. Then the handle G is turned to force the screws E F outward, the jaw-plates movving correspondingly until the mouth is opened to the required extent. In thus setting the speculum the handle will naturally stand at the front, as seen in Fig. 4; but after the jaws have been opened to the required extent the handle, with the arms, will be swung to one side, as indicated in broken lines, Fig. 4, so as to leave a clear spaceinto the mouth between the jaw-plates.

The pivot of the jaw-plates not only permits the swinging of the handle to the right or left, but permits the plates to adj ust themselves to the respective jaws, and because of swinging the handle and arms to one side or the other after the jaws are properly opened both jaws will be held against lateral movement, which might occur with the handle directly in front.

The speculum may be made with the jawplates rigidly attached to the arms, so as to have no swinging motion; but I prefer to pivot the plates for the reasons I have described vand for other obvious reasons.

Instead of constructing both arms C D with screws, so as to work in the handle in opposite directions, the screw on one maybe omit ted, the handle working on that arm as a pivot, and so as to be rota-ted, and under such rotation will force the other arm outward. This modification is represented in Fig. 5; or the screws on both arms may be omitted, the ends of the arms secured directly to the handle, as

seen in Fig. 6, the jaw-plates pivoted to the arms, and the mouth opened by hand, so as to insert the speculum. Then' the handle,y

with the arms, may be turned to one side, as before described.

I claiml. A mouth-speculum consisting of a vertical handle provided with arms extending from the respective ends of the handle, combined with jaw-plates pivoted to the end of said arms, substantially as and for thel purpose described.

TOO

2. The combination of the two jaw-plates, arms extending from said plates, the outer ends of the arins turned toward and into line with each other, a handle arranged upon the said ends of the arms and so as to rotate thereon, one of the said arms screw-threaded, and the handle correspondingly screw-th readed, and whereby under the rotation of the handle the said arms and the jaw-plates separate or approach each other, as the ease may be, substantially as described.

3. A mouth-speculuni consisting of a pair of arms, with means, substantially such as described, for supporting,r the said arms distant from each other, a j aW-plate pivoted upon the ends of said arms, the said jaw-plates provided with india-rubber cushions, substantially as and for J[he purpose described.

CHARLES E. PALMER.

VitneSseS:

FRED C. EARLE, LILLIAN D. KELSEY.

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