US425015A - Instrument for the transfusion of blood - Google Patents

Description

(No ModeL) E..E. ALLEN.

INSTRUMENT FOR THE TRANSFUS ION OF BLOOD. No. 425,015. x Patented Apr. 8', 1890.

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EUGENE E. ALLEN, OF GRAND RAPIDS, MICHIGAN.

INSTRUMENT FOR THE TRANSFUSION OF BLOOD.

SPECIFICATION forming part of Letters Patent No. 425,015, dated April 8, 1890.

Application filed November 11, 1889. Serial No. 829,831. (No model.)

To all whom it may concern:

Be it known that I, EUGENE E. ALLEN, of Grand Rapids, Michigan, have invented a new and useful Improvement in Instruments for the Transfusion of Blood, of which the following is a specification.

My present invention relates to certain improvements on the device patented to me by Letters Patent of the United States dated June 21, 1887, No. 365,327.

In my pending application, Serial No. 331,028, I have shown, described, and claimed many of the features which are herein shown and described but not claimed, the same being herein shown and described in order to more clearly show the location and operation of such features as form the particular subject-mat-ter of this application.

The object is to provide simple and effective means for varyingthe extent of the thrust of the roller and for looking it in its different adjustments and to render the device capable I of being compactly packed.

Figure 1 is a rear elevation of the apparatus attached to a tables edge, the cylindrical cap having been removed for the purpose of illustrating the internal arrangements of the mechanism, the parts being illustrated in such position as that the pressure of the roller upon the tube is released. Fig. 2 is a sectional view on line a at of Fig. 1. Fig. 3 is a plan View of one of the outside tube-holders with a portion of the tube clasped within it. Fig. 4 is a plan view of the supporting-standard. Fig. 5 is a view of the standard placed in a horizontal position and attached to a perpendicular body like a bed-rail. Fig. 6 is a detail showing the parts in such position as that the roller exerts one-half the pressure upon I the tube. Fig. 7 is a detail showing the parts in such position as that the roller exerts full pressure upon the tube.

Similarletters refer to similar parts throughout the several views.

A is a cylindrical case of any suitable size.

B is an elastic tube coiled within the case and passing out through the case, its ends lapping by each other, as shown in Figs. 1 and 2. Attached to the outer side of the case are two supporting-clasps (shown atF F) for support ingand holding in place the elastic tube.

D is a branch tube used to connect the main tube with the receiver E.

Within the case is the arbor G, one end of which is journaled in the front plate and the other end in the back plate, as shown in Fig. 2. Connected to the arbor G at one end, so as to be outside of the case, is a crank com posed of the two parts a a, hinged together at a so as to be capable of being folded upon itself. The hole a is made in the side of the case, into which the knob a of the handle projects when the same is folded. In this way the handle, while conveniently long when in use, may be folded into a small compass when the apparatus is packed away.

Attached to the arbor G- and extending laterally therefrom is the bar I, to the opposite extremity of which is hinged the bar J, which is in turn connected with the roller-carriage L for the roller M. Beyond the carriage L the arm J is prolonged into the curved piece K, which curves inward and backward, as shown in Fig. 1, so that its extremity rests against the arbor G when the pressure of the roller upon the tube is released. A coil-spring O is provided at the hinge between the bars I and J, which coil-spring has a tendency to hold the piece K in contact with the arbor G.

Now, it will be observed that when the parts already described are in the position shown in Fig. l by turning the handle a a the arbor will be turned, and with it the bar I, fixed thereon, and the bar J hinged thereto, so as to move the roller and roller'carriage in its orbit around the arbor without producing any substantial compression of the tube.

For the purpose of causing the roller to compress the tube the following mechanism is provided: The arbor G is chambered concentrically, and within this chamber is placed a supplemental arbor II, capable of turning position shown in Fig. 1 to the position shown in Fig. 7 without turning the arbor G. The slot is also located at the point at which the curved portion K rests upon the arbor, and the arm P and curved part K are therefore in position to act upon one another.

When the tube is not compressed, as in Fig. 1, the arm I is not in use. \l'hen, however, the arm 1 is moved from the position shown in Fig. 1 to the position shown in Fig. 6, the movement causes that portion of the arm I which is lettered Z) to act as a link or prop between the arbor and the extremity c of the curved piece K. As soon as this movement has advanced far enough so that the extremity c has passed over the shoulder formed at the extremity of the prop l), the extremity 0 will rest upon the part I) of the arm 1, in which position the part Z) acts as a stop to prevent further movement of the arm 1 unless by pressure exerted through the arbor I[. At the same time the arm P is stopped against any return movement, because the radial line passing through the arbor and the extremity of the prop Z) has passed slightly beyond the line of pressure, so that any return movement, as well as any forward movement, will tend to increase the compression of the elastic tube A. \Vhen the arbor II is turned so as to bring the arm 1 from the position shown in Fig. 6 to the position shown in Fig. '7, the movement will cause the part b to act as a prop or link between the center of the arbor and the extremity 0 until the extremity c has passed over the elbow formed at the extremity of Z) 011 the portion 72 \Vhen in this position, the portion b acts as a stop to prevent the further advance movement of the arm I, and the return movement of the arm I is prevented by the fact that the radial line between the center of the arbor and the extremity of the proper link 1) has passed beyond the line of pressure, so that any return movement would increase the compression of the elastic tubeA. The relative length and position of the parts 7) and Z) are regulated substantially as shown, so that the plane of the part if farther from the center of the arbor than the plane of the part I), thus causing a greater compression of the tube when the extremity c rests upon the part 0' than when it rests upon the part I).

The arm J and curved piece K are constructed so as to constitute a spring between the cam and the roller, whereby the roller may yield slightly to inequalitiesil'i the thickness of the tube or irregularities in the curve of the cylindrical case, not sul'lieiently elastic, however, to allow the roller to yield so as to permit the tube to open.

For ordinary pressures the first adjustment of the cam will be sufficient to hold the tube closed; but when the pump is used for extraordinary pressures (as in forcing air for the purpose of dilating) the second adjustment may be employed, and it is evident that by multiplying the parts of the arm 1 on the same principle a greater number of adjustments may be obtained.

P consists substantially of the combination of arms or props Z) Z), which in the form I prefer, as shown, constitute practically a cam pivoted in the center of the coiled tube andhaving its bearing-surface so constructed as to thrust outward and lock the extremity c and then thrust outward and lock the same again, so that for each outward adjustment the roller is held against any inward radial movement which would tend to produce variations in the force of the pump.

I11 practical use it is found desirable, in order to preserve the elasticity of the elastic tube, to entirely relieve it from. pressure when not in use and to have a simple device whereby the pressure may be applied in different degrees. All this is provided by the construction just described.

The tube-holders 1. I I provide with oblique slots, one of which is shown at Q in. llig. This will enable the operator to quickly apply the tube to the case and to remove it therefrom.

At one side of the cylindrical case, which I call the bottom ot' the case, I provide a dovetailed groove, which is shown in Fig. 1 at T. I also provide a clamp having two sides at right angles, provided with a male dovetail, as shown by S S. The clamp has an ear for the third side, (shown at 1%,) through which works a screw-bolt of the ordinary form. At the end of the screw-bolt is a linger-grasp. A washer may be provided, as shown. in Fig. 2.

U represents the edge of the table, and lji g. 1 shows the machine attached thereto.

U in Fig. 5 represents a perpendicularbody, like a bed-rail, to which the machine is represented as attached.

I do not limit myself to the form of mechanism by which the roller is supported and moved in its orbit, nor do I limit myself to the form of prop whereby the adjustment of the pressure is controlled or the manner in which said link is mounted, since I am aware that in details the mechanism may be largely modified without departing from the principle of my invention.

The pump described in this application has many features in common with the pump described in my application filed November 520, 1889, Serial No. 331,028; but it will be observed that the pump as described in the present application has an additional adjustment for the roller to the single adjustment which was described in said application Serial No. 331,028.

I claim- 1. In a surgical pump operated by the traveling pressure of a roller upon a coiled elastic tube, the combination, with the roller and mechanism. for supporting the roller and cansing the same to move in its orbit, of a device independent of the roller-supporting mechanism ior thrusting the roller against the tube, the said thrusting device having a locking ITO engagement with the roller-supporting mechanism at different distances from the tube, substantially as set forth.

2. In a surgical pump operated by the traveling pressure of a roller upon a coiled elastic tube, the combination, with the roller and mechanism for supporting the roller and cansing the same to move in its orbit, of a cam formed with a surface adapted to thrust outward and lock and then thrust farther out- Ward and lock again, whereby the roller may be locked at either of a plurality of adjustments when the pump is in operation, substantially as described.

EUGENE E. ALLEN. YVitnesses:

CHARLES TRUOX, 001m B. ALLEN.

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