US126046A - Improvement in rotary pumps - Google Patents

Description

G. S. FOLLENSBEE.

Rotary Pumps. l

Patented April 23, 1872.

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IMPROVEMENT lN ROTARVPUMPS. l

Specification forming part of Letters Patent N o. 126,046, dated April 23, 1872.

Specification describingan Improved Water- Elevator, invented by GEORGE S. FoLLENs- BEE, 'of Philadelphia, Pennsylvania.

Improved Water-Elevator.

, M y invention relates to improvements in. that class of water-elevating apparatus in which a propeller or propellers revolve in a casing; and my improvement, which is too fully explained hereafter to need preliminary description, has been designed with the view of obviatin g the defects arising from the whirling motion imparted to the water by the propellers.

In the accompanying drawing, Figure 1 is a vertical section of my improved water-elevator; Fig. 2, an inverted sectional plan on the line 1 2, Fig. l.

The casin g of the elevator consists of a number of alternate-vertical and inclined anged sections, secured together by bolts passing through the flan ges, asshown in the drawing. The interiors of the sections b, c, d, and e of this casing are made vertically cylindrical, these portions being arranged to the left and right alternately, those to the right for receiving the propellers D and Dlon the shaft E, and those to the left for the propellers F and F on the shaft G; and the cylindrical sections vof the casing communicate with Veach other through the inclined passages or sections f, so that the interior of the casing assumes the zig-zag form represented in Fig. 1. The shafts are caused to turn in contrary directions, as pointed out by the arrows, and the blades of the shaft E are made in the form of a righthanded screw-thread, while those of the shaft G have blades shaped like a left-handed screwthread. The lower end of the casing communicates with the water, which, bythe action of the propellers, is elevated within the casin g and discharged therefrom through the orifice at the top. The action of a propeller within a casing on water has a tendency to elevate the same, but at the same time to give it a whirling motion by which its ascent is impeded; hence stationary vanes, having an inclination `the reverse of the blades of the propellers, have been arranged in the interior of the casing to counteract the vwhirling tendency, as in the patent granted to W. T. Barnes March 20, 1849. While the stationary vanes, however, accomplished this end, the friction of the water against them was such as to absorb a large portion of the driving power, thus detracting from the apparatus as an economical medium for elevating water. In my improvement the whirling of the water by one propeller is counteracted/by the next propeller above, which, instead of detracting from the capacity of the apparatus, adds to the elevating efficiency of the same. The whirling of the water beneath the lowermost 'propeller D is prevented by a plate, which extends across and is secured to or forms appart of the lowermost section of the casing.

I claim as my invention- 1. The combination of a casing and two or more propellers, arranged one above the other and rotating on different vertical axes, so that the water raised by one propeller must pass diagonally to the other, substantially as and for the purpose described.

2. A water-elevator, in which are combined two parallel propeller-shafts, having different axes, carrying propellers, and rotating in opposite directions, substantially as herein described.

3. The combination, substantially as described, of the shafts E and G, their propel- 1ers, and the zig-zag casing.

In testimony whereof I have signed my name to this specification in the presence of two subscribin g witnesses. A

GEO. S. FOLLENSBEE.

Witnesses:

WM. A. STEEL, HARRY SMITH.

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