US506676A - Surgical instrument to cure gapes in fowls - Google Patents

Description

l (No M0661.)

, R, B. DNALD-Na n y y SURGICAL INSTRUMENT 'T0 CURB GAPES'IN FOWLS.

No. 566,676. Patented-666.17, 1893.

W/TNESSES.' /NVENTO/ MWAOMW MW www@ UNITED STATES PATENT OFFICE.

ROBERT BRUCE DONALDSON, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR OF ONE-HALF TO JAMES P. STABLER, OF SANDY SPRINGS,

MARYLAND.

SURGICAL INSTRUMENT `TO CURE GAPES IN FOWLS.

SPECIFICATION forming part of Letters Patent No. 506,676, dated October 1'7, 1893. Application filed July 22, 1893. Serial No. 481,213. (No model.)

To all whom t may concern: Y

Be it knownthat I, ROBERT BRUCE DONALD- SON, a citizen of the United States, residing at Washington, in the District of Columbia, have invented certain new and useful Improvements in Surgical Instruments; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which 1t appertains to make and use the same.

This invention relates to an improved surgical instrument for extracting or removing the parasites known as gape worms from the trachea or wind pipe of fowls, and it consiste in the construction and arrangement of parts hereinafter described and definitely pointed out in the claims.

The aim and purpose of the invention are the provision of an implement of the nature above indicated, which will be effective and harmless in its operation, strong and durable, snnple in its `construction and cheaply manufactured. Thisobject is attained bythe construction illustrated in the accompanying drawings, wherein like letters of reference in` dicate corresponding parts in the several views and in which- Figure 1 is an elevation of the device. Fig. 2 1s an enlarged vertical section of the head portion. Fig. 3 is a det-ail view of the blank. Fig. 4 is a view of a modified form of head, and Flg. 5 is a cross-section on line Fig. 2.

In the drawings Arepresents the head and A a flexible shank of wire or other suitable material having a twisted loop a at oneV end forming a handle. The end portion A2 of the shank opposite the loop, is attened or cut away on one side as at B and B', having a flat space with an intervening or central portlon b between. The flat surfaces B B are of substantially uniform length and have longitudinal grooves b in their centers, for purposes hereinafter mentioned. The end C of the portion A2 istapered to a point, and bent down at an angle in the direction of the llat portion. In securing the head the wire is bent back onto itself at the center of the portion b, so that the dat faces B B will be directly opposite and parallel, leaving a space between, the outer or end wall of which is formed by the ends of the part b. The end of theloop thus formed constitutes a rounded blunt point which permits the instrument to be inserted without injury to the membrane. Between the flat portions B B is secured the head A which consists of an inverted section of feather, the shaft of which is tightly compressed into the groove b and between the iat portion B B and the end C of the wire is forced into the shaft, thereby firmly holding the feather section in place. The end C is constructed to form a smooth incline termination of the exposed portion of the end to avoid injury during withdrawal. The vanes of the feather are arranged to incline outwardly in the direction of the handle end of the shank and are cutaway at an incline and forms substantially a V or conical Shaped head with the apex of the cone presented outwardly. The inclination of the sides of the feather is in the direction of the natural inclination ofk the vanes, so that the head is composed of la series of inclined vanes 0r branches of varying length, decreasing in length toward the outer end, and acting as flexible barbs all of which incline toward the A handle end of the shank.

The peculiar formation of the head, the flexible shank and flexible nature of the barbs premit of an easy insertion of the same without changing the position of the parasites, and owing to the diversity in the length of the barbs, aslight twist or turning of the head will carry the barbs into contact with the adjacent sides of the trachea at all points, so that the parasites will invariably be engaged by members of the barbs and drawn out thereby as the instrument is withdrawn.

In Fig. et l have shown a modified form of head wherein the wire shank is sharpened and passes longitudinally through the shaft of the feather section, the outer or pointed end being looped to secure the head in place and to form retaining means anda rounded blunt end to preventinjury during insertion.

It is evident that minor changes in the coustruction and arrangement of the parts can be made and substituted for those shown and described without in the least departing from the nature and principle of the invention.

ICO

Havim, thus described the invention, what feather interposed between the bent portion is claimed as new, and desired to be secured and the shank, and tightly held between the by Letters Patent, is same throughout its length, substantially as 1. A surgical instrument consisting of a described. I5 5 eXible shank having a looped end, and a In testimony whereof I affix my signature in lfleatl composed of an inverted section of presence of two witnesses.

eat er secured in place by the loop, substantiauy as descbed- ROBERT BRUCE DONALDSON.

2. A surgical instrument consisting of a i WVitnesse/s: [o fiexible shank having one end bent back onto M. A. RUSH,

itself and a head composed of a sectionof l L. L. BACON.

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