US153296A - Improvement in steam-pumps - Google Patents

Description

w. ATKINSON.

Patented July 21,1874.

UNITED STATES PATENT OFFICE.

WILLIAM ATKINSON, OF GARDNER, ILLINOIS, ASSIGNOR. TO HIMSELF AND THOMAS MAYDEW, OF SAME PLAGE.

IMPROVEMENT IN STEAM-PUMPS.

Specilicaton forming part of Letters Patent No. 153,296, dated July 21,1874; application filed April 7, 1874.

To all whom 4it may concer-n: this same water passes through valve e', and Be it known that I, WILLIAM ATKINSON, is on the next movement expelled through of Gardner, in the county of Grundy and outlet d'. This produces a continuous ilow of State of Illinois, have invented a new and water at the exit-an eect which has been Improved Steam-Pump; and I do hereby deproduced heretofore,but,I believe, byditferent clare that the following is a full, clear, and means and a di'erent mode of operation. exact description of the same, reference being As the pistons G G are perforated at g g, had to the accompanying drawing, in whichand receive the same pressure of steam on Figure l is a longitudinal view in vertical each side, it is necessary to destroy this equisection; Fig. 2,a horizontal section; and Fig. librium in order to make the pistons move. 3, a detail view in section of the end of steam- This I do by sliding forward the two valves chest. K alternately, and thus letting the steam es- The invention relates to means whereby cape through a channel, J', to a space behind greater simplicity, less liability to stoppage, the valve, and thence to the exhaust through and greater economyin the operation of pumps channel J. may be secured. These means will first be As upon the degree of freedom with which fully described in connection with all that is the steam is exhausted from behind the valve necessary to a full understanding thereof, and K depends the resistance to valve-pistons G, then pointed out in the claims. and the consequent velocity and power ex- Arepresents the main cylinder of a pump, erted by the piston B, I use the transverse having inlet-ports a a, exhaust a', and piston screw or valve O, that works across the chan- B. C is the piston-rod, which is extended nel-way J, and may be'made to graduate the through the cylinder at each end, and into the size ofthe outlet for the steam. This enaoppcsitely-placed auxiliary cylinders D D. bles me to use alarge piston, and yet regu- These have, respectively, water-inlet d, outlet late the degree of power exerted, while it also d', and pistons E E', the latter being reciproallows me, when using water that is muddy,

cated at the same time and by the same or from other causes inclined to foam, to depower as the main one, B. F is the steamstroy this tendency by enlarging the exhaustchest, in which is placed the valve-operating outlet. pistons G G, having the steam-inlets g g, and It will be observed that the valves K and connected by the stem H, having the median 5the valvepistonsG, with theirseveral seats, disk or flange h. I is the main valve, recessed are all arranged in thesteam-chest,fandmainto receive the flange h, by which it is moved tained in place by a single cap, l?, which may back and forth by the movement of pistons G be held only by two set-screws. The -`caps P G. J J are channels leading from the steamhave a recess or chamber, p, behind the kpisspace behind pistons G to the exhaust. K K ton K, which communicates with steam chanare valves, having shanks k, operated by a nel-ways J J This is very important, as lever, L, that is pivoted at l, and actuated by these parts require frequent examination and a sliding bolt, M. The latter are alternately adjustment to cause them to fit closely and moved by the piston B in its reciprocations. operate in the most effective manner. By ar The operation of the pump is as follows: ranging them all together in the ends of the As the piston E moves forward and creates a chest F, complete access to them is obtained vacuum behind it, the water ilows in through in a moment; while even in the Cameron inlet d, follows the piston, and, as soon as the pump, which is the nearest approximation to latter begins to return, courses through the mine, and esteemed the most convenient of valve e. It now follows the channel N and access, it requires a longer time to takeout the piston E', which in its turn is moving for and return these parts than to reit them. ward and creating a vacuum in its rear. As What I claim as new, and desire to secure soon as the piston E begins to move back, by Letters Patent, iS-

1. The combination, with main cylinder A, having steam-ports a a', and. the rod C, having thereon a middle piston, B, and two end pistons, E e E e', of the two cylinders D D', placed at opposite ends of main cylinder, having', respective1yWater-inlet d and. outlet d', d connected by a channe1-way,N, as and r the purpose specified. 2. The con1bination,with piston G, of valves K and valve-seat 'caps P, the latter m'rangcd in the ends of chest, and having chamber p and channels J J', arranged as and for the purpose specified.

WM. ATKINSON.

Witnesses:

SoLoN` C. KnMoN, i W. W. HOLLINGSWORTH.

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