US1033627A - Obstetrical forceps. - Google Patents

Description

J. SKLAR.v

OBSTBTRIGAL PORGEPS.

APPLICATION FILED 1133.111912.

1,033,627, Patented July-23, 1912-.

JOHN SKLAR, OF BROOKLYN, NEW YORK.

OBSTETRICAL FORCEPS.

Specification of Letters Patent.

Patented July 23, 1912.

Application led February 15, 1912. Serial No. 677,667.

To all w/wm t may concern:

Be it known that I, JOHN SKLAR, a citizen of the United States, residing at Brooklyn, county of Kings, State of New York, have invented new and useful Improvements in Obstetrical Forceps, of which the following is a specification.

This invention relates to obstetrical foroeps, and the main feature of the invention is to provide the instrument with an indicator whereby the axis of the blades can be readily ascertained when the device is operated, and injury to the perineum avoided.

The end portion of the indicator has an oscillating handle adapted to swing about the axis of the indicator. The indicator is pivoted to an arm which can swing about the axis of a depending bar, thus giving universal movement to the handle.. On the shanks of one of the blades is mounted a swivel screw with clamping thumb nut whereby the jaws of the blades can be accurately set in their relation to each other or adjusted to move apart to suit the conditions of the operat-ion. The swivel screw has universal movement when the blades are adjusted to allow for the arc like swing of the shanks of the blades.

The novel features of the invention are more fully described in the following speciiication and claims and illustrated in th ,accompanying drawing in which Figure l represents a plan or top view of an instrument embodying this invention. Fig. 2 is a side elevation thereof, the dotted lines in this figure showing the position of the instrument when operated. Fig. 3 is a vertical section taken along the line w a' of Fig. 2. Fig. 4. is a vertical section taken along line y y Fig 3. Fig. 5 is a section taken along the line .a .a Fig. 2.

In this drawino` the letter a designates a pair of blades or jaws the sides of which are skeleton or open in form. These blades have the proper curvature in relation to the shanks to allow manipulation of the instrument, as is well understood by surgeons and others skilled in the art of operating the tool. These blades have shanks b forming a continuation of the blades and the shanks are pivoted together at c. This pivot is fastened to one of the shanks and it is engaged by a slot formed in the other shank so that the two blades can be taken apart when necessary to clean. One of the shanks has a downwardly formed extension d, and

the other. shank has a depending bar e adjustably connected to the shank. By gripping the extension bar UZ and the depending bar a the blades can be actuated to adjust the jaws of the blade. Thedepending bar e is adjustably connected to the shank by .means of a headed stud f fastened to t-he bar and adapted to engage a key slot g in the bar. The bar e is equipped with a sliding latch piece 7L which is attached to the barby means of a thumb nut i. The upper portion of this latch cooperates with the stud f and when the thumb nut is fastened the latch will prevent movement of the bar. When the thumb nut z' is loosened the latch can be slid out of engagement with the headed stud f and the bar can be adjusted up or down on the depending shank of the blade. On the lower portion of the bar e is jointed an arm j and to the free portion of this arm is pivoted an indicator 7@ the stem of which carries a handle m. This handle can oscillate about the stem of the indicator and being pivoted to the jointed arm it can swing about the axis of the depending arm, as st-ated, thus giving universal movement to the handle.

On the upper portion of each blade is mounted a post n and 0 respectively. These posts have stems fitted into sockets in each of the blades and each post is prevented from being pulled out of the Socket by a set screw p. The set screw engages an annular groove g located on the stem of each post, this construction allows each post to revolve on the blade. A screw r is pivoted at s to the post n while the stem of the screw is adapted to co-act with a slotted bifurcated portion of the post o. The screw r carries a nut t to engage the screw and coperate with the post 0 to adjust and clamp the blades. In adjusting these blades by means of the screw the shanks of the blades will swing in an arc of a circle and in order to allow ready play or movement of the stem of the screw while in the slot the posts will swivel. In other words the blades can be adjusted whilethe screw stem is in the slot and then clamped in their proper relative positions by adjusting the nut so that the jaws of the blade will grasp the object.

In operating the instrument the jaws are set a predetermined distance apart by adjust-ing the nut, the handle is grasped and the indicator pointed to gage the axis of the blades as shown in dotted lines in Fig. 2 and by reason of the peculiar format-ion of the blades the head of the infant will be grasped by the jaws and drawn down the superior strait to the pelvis and then drawn out without injury to the child or laceration of the perineum.

l claim: A

l. A device of the character described, comprising` a pair of gripping jaws pivotally connected together and provided with shank portions, one of said shank portions being bent to an angle from the general direction of the length of the jaw upon which it is mounted, a stud and a pin carried by said last-mentioned shank portion, a rod provided. with a key slot for receiving said stud and said pin, a latch slidably mounted upon said rod and provided with a surface for engaging said stud, and means for holding said latch in fixed relation to said stud and said rod.

2. A device of the character described comprising a pair of jaws, a shank integral with one of said jaws and extending therefrom, a rod adjustably mounted upon said shank and adjustable in the general direction of the length thereof, an arm carried by said rod, a handle pivotally connected with said arni and an indicator for disclosing the position of said handle relatively to said arm.

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

JOHN SKLAR.

VVit-nesses EDWARD JAMES SOVATKIN, JULiUs AUGUST ABRAI-IAMS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,` Washington, D. C.

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