US2018837A - Centrifugal device - Google Patents

Description

Oct. 29, 1935. E. COLLATZ CENTRIFUGAL DEVICE Filed July 18, 1954 220-62230)? EWALD COLLATZ mwmvg,

fliiornayd Patented Oct. 29, 1935 UNITED STATES Application July 18, 1934, Serial No. 735,901 In Germany July 12, 1933 2 Claims.

This invention relates to a. centrifugal device having vertically swinging holders for receptacles containing a liquid or a suspension. The object of the invention is to obviate the drawback of the known centrifugal devices for the purpose in view that the holders with the receptacles therein assume during the revolution a practically horizontal position, in which their axes form with the axis of rotation of the device an angle of nearly 90. It has been ascertained by thorough investigations that there exists a close connection between the efficiency of the de vice and the angular position of said holders with their liquid receptacles according to the contents of the same, and it has been discovered that in order to obtain in every case the highest efficiency provision should be made to vary the angle of the receptacle holders with the receptacles and the liquid therein with consideration of the kind of the liquid and the effect sought to be attained. It has been found that the highest efficiency and the best effects are obtained if the angle between the axis of rotation of the centrifugal device and the axis of the receptacle holders amounts to from 55 to 70 according to the requirements of the case concerned.

I attain the object in view by means of exchangeable sleeves which are detachably attached to the holders of the liquid receptacle and can be exchanged whereby the position of the point of gravity of the holders relatively to the axis of rotation of the centrifugal device can be changed, and furthermore I provide counterpoises also connected with said holders and being preferably so designed that their weight can be varied with consideration to the change of the point of gravity. The receptacle holders are suspended eccentrically, but in order to give them a vertical position in their position of rest, that is to say, to prevent the eccentric position and the counter-poise from giving said holders an oblique position, abutment members are provided which can contact with the member of the centrifugal device from which the holders are suspended, all as more fully described hereinafter.

The invention is illustrated diagrammatically and by way of example on the accompanying drawing on which Figure l is a side-view of one half of the centrifugal device which is here assumed to be in operation, in consequence whereof the receptacle holder (I) is in an oblique position, and Figure 2 is a plan of the parts shown in Fig. 1.

On the drawing, I denotes a sleeve or tubular member for attaching the device to the driving shaft of the driving means (not shown), and 2 is a longitudinal body ormember of sheet-metal and forms at its ends (of which only one is shown, the other being broken away) forks, the lateral outer portions of which are bent downwardly, as at 3 in Fig. 1, so as to be reinforced and be able to constitute bearings for pivots 5 of a bow 6. The pivots 5 engage holes 4 of the fork legs, and from each pivot extends downwardly an angular abutment member 1 (Fig. 1) which contacts with 1 the fork legs when the receptacle holders (ID) are in their position of rest, viz in their vertical position.

The receptacles for the liquid to be treated are generally the known test glasses (not shown). They are contained in holders ll) (of which only one is shown in Figs. 1 and 2), the shape of which corresponds with the shape of said glasses; each holder 10 is closed at its lower end and open at its upper end where it extends through the bow S and through a sleeve H which is detachably attached to said how. The sleeve H can be ex changed for a longer or shorter sleeve and in correspondence therewith the position of height of the receptacle ID in the bow 6 will be changed which is, of course, of influence also upon the position of the point of gravity l2, and in consequence thereof the angle between the axis of the. holder [0 and the axis of rotation of the centrifugal device will likewise be varied; From the outer portion of the bow 6 extends a counter-poise 8. This is preferably combined with a small casing l3 for the reception of a cer tain quantity of shot which may be increased or decreased in order to vary the action of the 5 counter-poise (8, I 3). Owing to the provision of the exchangeable sleeve II and the variable counter-poise 8, IS, the holder ill with the liquid receptacle (test-glass) and the liquid therein will assume, when the device is quickly rotated, not a horizontal position, as is the case with the known devices of the type in question, but its position will be more or less oblique, that is to say, its axis will form an angle with the axis of the member I. In the example shown'in the drawing the angle is an acute one and amounts to 55 whereby the centrifugal action is improved, and at the same time loss of liquidby spurting from out of the liquid receptacle is prevented. It will be obvious that the angle can be increased or decreased by suitable selection of the weight of the counter-poise 8, or 8, l3 respectively, and of the sleeve ll, always in accordance with the liquid to be treated so as to obtain the highest efficiency.

.substantially as set forth.

centrically from said body member, bows hinged to this member, detachable sleeves attached to said bows and receiving said holders, abutment members constituted by extensions of the bows and adapted to hold them in horizontal position when the device is at rest so as to keep the holders from assuming positions wherein their lower I ends converge toward the vertical axis of the rotary body member, and a variable counter-poise connected with every bow counter to said abutment members, as well as counter to said sleeves, V

EWALD C OLLATZ.

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