US1343325A - Opening means for centrifugal bowls - Google Patents

Description

` M. LEITCH. OPENING MEANS FOR CENTRIFUGAL BOWLS.

v APPLICATION FILED FEB. I4, 1919. 1,343,325.

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OPENING M EANS FOR CENTRIFUGAL BOWLS. APPLICATION F1LED F1;B. 14, 1919.

Patented June 15, 1920.

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MEREDITE LEITCH, 0F POUGHKEEPSIE, NEW YORK, ASSIG-NOR TO THE DE LAVAL SEPARATOR COMPANY, 0F NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

OPENING MEANS FOR CENTRFU'GAL BOWLS.

Specification of Letters Patent.

Patented June 15, 1920.

, Application led February 14, 1919. Serial No. 276,886.

and useful Improvement in Opening Means' for Centrifugal Bowls, of which the following is a full, clear, and eXact description, reference being had to the accompanying drawings, which form a part of this specication.

My invention relates to means for unscrewing, from a centrifugal bowl, the nut that holds the parts thereof in an assembled relation. The object of my invention is to provide means attached to the centrifugal machine frame for easily removing the bowl nut.

Many centrifugal bowls have a large bot tom, from the center of which rises a hollow stem, screw-threaded on the outside of its upper end. A bowl shell, with its lower edge fitting against the large bottom, surrounds this stem and is held in place by a nut screwed thereon. Ordinarily, when it is desired to clean such a bowl, it is removed from the machine, carried to a more or less distant place and secured in a special clamping ring. A special wrench or Spanner is then applied to the nut to remove it from the bowl. The clamping ring must be released before the bowl can be taken away for washing. When assembling the machine, this process must be reversed.

The object of my invention is to provide means on the frame of the machine for removing the nut without recourse to independent clamps, wrenches, etc.

In the accompanying drawings, which illustrate several embodiments of my inventionr- Figure 1 shows a separator bowl in section with the disks omitted.

Fig. 2 shows a separator frame provided with my invention, the bowl being shown in full lines in its normal working position and in dotted lines in position for removing the nut.

Fig. 3 is a front view of a portion of the frame showing one form of my invention.

Fig. 4 is ahorizontal cross-section through same. Y

Figs. 5 and 6 are views, corresponding to Figs. 3 and 4, of another form of my invention.

Fig. 7 is aview, similar to Fig. 3, of an other yform of my invention.`

Fig. 8 is a vertical cross-section through same.

Figs. 9 and 10 are views, corresponding toV Figs. 7 and 8, of another form of my invention.

o represents the frame or stand for supporting the driving mechanism and the frame 79, which in turn supports the bowl. c is the bowl bottom, d the hollow stem, e the bowl shell and f the nut threaded on the end of stem d and holding in place the bowl shell e.

In Figs. 3 and 4, the frame b carries two pins g, g and a guide pin h slightly smaller that the hole in the top of the bowl and located centrally between the two pins g, g.

In Figs. 5 and 6, the frame carries two pins z', a', similar to pins g, g, and is provided with a socket j of a diameter slightly greater than the bowl nut.

ln Figs. 7 and 8, the frame has a guide pin 7c similar to and functioning like pin 7L. m is a pin secured in a lug a projecting toward the center of the guide pin L.

ln Figs. 9 and 10, the frame has a pin 0, similar to pin m, projecting radially inward from the periphery of a socket p, similar to socket j.

The nut of a centrifugal bowl is ordinarily provided either with two holes in its top adapted to receive two pins in a wrench, or with 'radial holes in its circumference adapted to receive a pin in a Spanner. The two pinsg, c7 of Figs. 3 and 4, or the two pins z', z' of Figs. 5 and 6, are of a size and a center distance adapted to 1 enter the above mentioned holes in the top of the nut. The

`single pin m shown in Figs. 7 and 8, or the single pin o shown in Figs. 9 and 10, is adapted to enter a spanner hole in the circumference of the nut.

When it is desired to disassemble a centrifugal bowl, the operator presents the nut to the frame,lwhere, guided by the guide pin 7L or k, or by the socket y' or p, it is easy to engage the top holes in the nut with the pins i g, gjor i, z', or one of the radial holes in the nut with the pin m or pin o. With both hands on the large diameter lower portion of the bowl, the operator can turn it to loosen the nut. The bowl may then be carried to any convenient place for washing. After the bowl is washed and assembled, the nut may be tightened in the same manner.

Having now fully described my invention, what I claim and desire to protect by Letters Patent is:

1. Means for unscrewing centrifugal bowls from their holding nuts comprising a ixedly positioned frame, means thereon engageable with the nut to prevent its rotation, and guiding means on the frame to guide the bowl nut into engagement with the rotation preventing means.

2. Means for unscrewing centrifugal bowls from their rholding nuts comprising a fixedly positioned frame, andmeans thereon adapted to engage the holding nut, when the bowl is brought to a position wherein its axis extends horizontally and is thrust laterally against the iframe, and hold said nut stationary while the bowl is turned to loosen the nut.

3. Means for unscrewing centrifugal bowls from holding nuts having two wrenchengageable holes comprising a fixedly positioned frame, two pins thereon adapted to be engaged with said holes, and guiding means on the frame to guide the nut into engagement with said pins.

4. Means for unscrewing a centrifugal bowl having a top hole from' a holding nut having a wrench-engaging hole, comprising a fixedly positioned frame, a pin on the frame, and a guide pin on the frame adapted to engage the top hole of the bowl and vguide the hole of the nut into engagement with the pin on theframe.

5. Means for unscrewing centrifugal bowls having a top hole from holding nuts having two wrenoh-engageable holes, coniprising a ixedly positioned frame, a guide pin thereon slightly smaller than the inside of the top hole of the bowl, and two adjacent pins adapted to enter the holes in the bowl nut and prevent rotation of the nut when the bowl is turned.

In testimony of which invention, I have hereunto set my hand, at Poughkeepsie, N. Y., on this 11th day of February, 1919.

MEREDITH LEITCH.

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