US256276A - Air-pump - Google Patents

Description

(Model.) 2 Sheets- Sheet 1,

^ N. B. BLAGKMER.

AIR PUMP.

No. 256,276. 2 Patented Apr. 11,1882.

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2 sheets-sheet 2,.

(Model.)

N. B. BLAGKMER.

AIR PUMP.

Patented Apr. 11,1882.

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UNITED STATES l NAPOLEON n. BLAGKMER,

APATENT OFFICE.

0F PORTAGE, VISCONSIN.

AIR-PUMP.v

SLEECIFICATION forming part of 4Letters Patent No. 256,276, dated April 11, 1882.

Application led July l5, 1881. (Model.)

To all Iwhom it may concern: n

Beit known that I, NAPOLEON B. BLACK- MER, a citizen of the United States,.residing at Portage,iu the county of Columbia and State of Wisconsin, have invented a new'and useful Improvement in Air-Pumps, of which the following is a specification. y

My invention relates toa class of air-pumps used to exhaust air from a receiver or other vessel; and the object of my improvements is to so construct it that with one cylinder and lonepiston the air may be exhausted from either end of the cylinder. the mechanism illustrated in the accompany ing drawings, in which Figure l is a perspective view of my iinproved air-pump. Fig. 2 is a vertical central section of the same, the guide-rods and crossbar being in view. Figs. 3, 4, and 5 are detail views ofthe disks which operate to cont-rol the inlet and exhaust ports of the cylinder.

The same letter indicates the same part wherever it occurs in theV drawings.

My invention relates to the class of double acting air-pumps used to exhaust air from a receiver or other` vessel, and so constructed that with one cylinder and one piston air can be alternately exhausted from the receiver by both ends of the cylinder.

My invention consists in the peculiar construction and operation oi two series of disks applied to the ends ot the cylinder to control the admission and expulsion of air, and of the mechanism by which said disks are operated automatically while the pump is in action, all as hereinafter more specifically set forth.

In the drawings, A marks the cylinder of the pump, attached to base-plate Z, and provided with the head M at top.

B is the piston, composed of the lower plate, P', fixed to the end of the piston-rod,.the upper loose plate, R, and the elastic packingring Q, interposed between them. The piston is attached to the lower end of rod C, the upper end ofwhicli is threaded and passes through cross-bar E, attached to the top of guide-rods F F. A thumb-nut, T, is applied on the upper end of rod C, to draw it up or let it down, as required. A sleeve, S, held by a head,M,sur rounds the rod C and extends down to the I attain this object by' loose plate R. It results from this construction that when by thumb-nut T the pistonrod C is drawn up the plate P compresses the packing-ring Q against plate It and expands it, so that it bears tightly against the walls of the cylinder. Y H marks the lever by which'the pump is operated. It consists of a handle and a'ring which surrounds the cylinder, and is pivoted at V V to the Aguiderods F F. This lever is connected with the base of the cylinder by a link, G, pivoted at p to an eye on the ring H, and at p to lugs ou the base of' the cylinder.

0n the side ot' the upper and lower ends ot' the cylinder is a circular plate, I, (see Fig. 5,) provided with two holes, a b, about ninety degrees apart, both leading into the interiorof the cylinder. This plate is stationary, and may be a part ofthe body of the cylinder. On its side is placed a spring, s, with a hook at the end, as shown.

On plate I is placed a disk, K, Fig. 4, of the same diameter, and provided with corresponding holes a b', but nearer together by the diameter of one hole. This disk has a squarel the hooked end oi' spring sf On disk K is placed a disk, L, ot' which Fig. 8 is an inside view, the outer side being seen in Fig. 1. This disk has holes c2 b2, nearer together by the diameter of one hole than the projects into and engages with the notch nin disk K, but is smaller than the width of the notch by the diameter of one hole. lt is also provided with the inlet and exhaust t' e, as shown in Fig. 1. Both the disks L and K turn on a stud, x, passing through their centers and entering the center of plate I. The disks on both ends ot' the cylinder have the same construction, arrangement, and operation, serving alternately to control the inlet and exhaust openings of the two ends ofthe cylinder, one exhausting while the other takes air. The outer disks, L L, are connected by a rod, N, pivoted to them at q q. This rod is provided with adjustable lugs o o', which alternately, as the lever His vibrated, engage with the slant-r ing sides ot' a triangular cani, l?, attached to the inner side of the ring of lever H.

notclnn, and two small notches, t t, to receive holes of disk K. It has also a lug, l, which rIhe vessel from which the air is to be pumped is to be connected to the inlet-pipes@l t' by rubber tubes.

It operates as follows: rlhe motion ofthe lever is by the guide-rods and cross-head communicated to the piston. up, the air rushes in behind it through the rubber hose from any vessel to which it may be attached until near the end of the stroke, when the lug p engages with the lug o at the upper end of the connecting-rod and changes the disks. The air is exhausted from behind the piston and expelled in front ot' it. It is necessary that in changing the disks the aperture through which the air is being expelled should Vremain open until the close of the stroke,

while behind the piston the exhaust should close before the air rushes in behind the piston when the disks change, that the exhaust should close rst and open rst. This is accomplished by the disk K having the notch to engage with the lug on L. The three holes ct a a2 being in line, and L, Fig. 3, receiving the motion from the connecting-rod, moves tirst, carrying 1.2L nearly ot'f from a K and b2 L in line with b K. The lug then engages in notch in K and carries K until u K passes off from The piston movingI other side of the notch and brings a. K and a' I in line and b K and b I out, ready for the reverse stroke of the piston.

I claim as my invention and desire t0 secure by Letters Patentl. The combination, with the piston and its rod, of the cross-head, guide-rods, lever, and

link, substantially as and for the purposes herein specified.

2. -The combination, with the flexible packingwring, ot' the piston, rod, plate, sleeve, screw, cross-head, and nut, as set forth, substantially as and for the purposes specified.

3. In an air-pump, two sets of cut-off disks, each set being provided with holes adapted to register, as described, in combination with an operating-lever and a connecting-rod, Whereby the sets are alternately worked, as set forth. Y N. B. BLAGKMER.

WVitnesses:

J. S. BUEL, L. A. RANDALL.

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