US114284A - Improvement in pumps - Google Patents

Improvement in pumps Download PDF


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US114284A US114284DA US114284A US 114284 A US114284 A US 114284A US 114284D A US114284D A US 114284DA US 114284 A US114284 A US 114284A
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    • F04B31/00Free-piston pumps; Systems incorporating such pumps


2 h L 1. j' P. GALLAGHER' S eets Sheet Improvement 4in Pumps. ,284. Parentedmay 2,1821.

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zsh --sh 2. 1. P. GALLAGHER. ts e Improvement, in Pumps.

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'Letters PatentNo. 114,284, dated May 2, 1871.


The Schedule refer-red tn inthese Letters Patent and making part of the same.

To all whom fit may concern' Be it known that I, JOSEPH I. GALLAGHEP., of St. Louis, in the cou-nty of St. -Louis and State ot' Mis;- souri, have made certain new and useful Improvements in Air-'P umps; and I'do hereby declare that the following is a full and true description thereof, reference being had'to the accompanying drawing and 'to the letters of reference marked thereon.

This invention relates to-an improved construction of air-pumps operating automatically; and

rllhe nature thereof consists- First, in the construction ot' a double-acting rubber' air-pum p, arranged in combination with a peculiar constructed air-receiver or aerometer, also formed of rubber.

Secondly, in supporting and connecting thepiston ot" said pump to a slide attachment, having anti-friction rollers operating in grooves in the frame.

rlhirdly, in arranging, in combination lwith cloon- Work gearing, a pecullar-constructed cam-shaped device for converting the rotary motion ot' said gearing tothe required reciprocating motionfor operating said slide and piston ofthe pump.

Lastly, said invention relates to certain detail construction aud arrangement of parts yhereinafter to be more fully described.

To enable those herein skilled to make and use my said invention, I will now more fully describe the same, referring to the accompanying,-

Figure 1 as a side elevation;

Figure 2 lasa front elevation;

Figure 3 as a sectional side elevation; and to Figure 4 as a sectional top plan at line x 1.

The operative mechanism l support in a suitable metallic frame, A.

'lhe air-pum p B I construct of any convenient shape, by preference ot' rubber, secured air-tight to top and bottom plates Bl B2 by proper bands and faste-mugs,- forming a vibrating interior air-reservoir, similar to' the movable portion ot' a common bellows.

Similarly secured, I arrange a center' plate forming a soiid pistou, C, within said pump, dividing the same into the respective top and bottom air-chambers Cl and y G2, as clearly shown in fig. 3.

Within said air-chambers are suitable flap-val ves se` o ured to the plates B1 and B2. Said valves are arranged to open and'close alternately, forming the receiving-valves c c and discharge-valves c2 c3, as shown in said fig. 3.

' The air-pump B thus constructed I arrange within the l'ralnevA, its top and bottom plates 1?K B2 being secured stationary by bearing-plates b to 4connectingrods A1A2 ofthe frame A., and so as to allow free reciprocating movement for its piston C.

ln combination with the pump B I have arranged an dicated by dotted lines in g. 4.

aerometer, D, supported upon a proper standard forrning part of the frame A. Said aerometer I also construct ot' India rubber, having arranged wit-hin the same a spiral spring, D, and properly 'secured and closed air-tight b y top and bottom plates D2 D3.

Within said aerometer, at its bottom, I arraugesuitable valves, to open and close in opposite directions, forming the receiving and discharging-valves d dl, in

The aerometer D thnsconstructed and arranged I connect in communication with the respective aircharnbers Gl C2 of the air-pump by suitable-branch tubing cl2, secured to the valve-ports.l The Yvalve d has a discharge-nozzle, to which the distributing-pipes are connected.

By thus arranging said valves d di to open inopposite directions a reow of air from the air-receive', to the pump is prevented; at the same time aready dis` charge of air is eifected by the weight pressure upon said air-receiver D. Similarly as the operation of thel respective valves in the pump B is alternate in receiving and discharging, it is plain a constant current of air at all times is communicated to the air-receiver, or aerometer when the p ump is in motion.

rLhe air-pump piston G I connect t'o a slide, X, consisting of the'upper cross-head E', connected by vertical rods e to lower cross-heads E1 E, securedV to the transverse sides of said piston,

The slide X has its cross-heads at`eacb end provided with anti-friction rollers e e2 workngagainst'and guided by suitable vertical grooves or slots in the frame A, as shown in vfigs. 1 and 2.

To operate the piston and slide :l: I have arranged a vertical shaft, F, carrying a cam-device, Gr, and op,- erated by clock-Work gearing, hereafter to be described.

The shaft F (passing through a hole, e, in-the crossheud E) I support in a thrust-journal, f, of the upper cross-bar H ofthe frame A, and at bottom resting in a s lotted'screw-socket, fsecured to th'e pump-plate Bl, the arrangement of said shaft being such as to follow up all rear and vertical play, in mannerl clearly indicated in fig. 3.

To the shaft F I secure the cam device Gr.- n order to convert the rotary mot-ion of said shaft to a reciprocating mot-ion required for operating the slide ,X, carrying the piston, said cam G isso constructed as to have right-and'det spiral cam surfaces g g1 of the peculiar shape shown in figs. 2 and 4.

^ To facilitate rotary reciprocating motion-of the cam G with least friction, I have provided the cross-head lE of the slide X with additional'anti-friction rollers g2 g3, so arranged as" to .engage top and bottom upon the cam surfaces g1g2 of said cam Gr, and as shown in gs. 2 and 4. Also the slide X, to' gain u niformityof operation, is properly balanced by thecounterpose H',

v shaft I, clearly indicated in fig. 1.

secured'to its cross-head E, passing over-'pulleys secured .to the frame A, as in figs. 1,2, andl.

I)The clock-work gearing to operate and regulate 4theaction of the mechanism described to operate the airpump piston is as follows:

On Vthe main shaft I, secured in bearings i, to the" frame A, I have arranged `at each end thereof theA large spur-gearsJ and ,JC The gear J, however, Vis secured lloosely to said shaft by a ratchet-wheel, j,

having as follower a click orspring pawl, j', secured to ing is by a suitable weight suspended o'n a pulley acting by acord secured and wound around the drum or To wind said clock-gearing for automatic action, I have furthermore arranged in gear with'the large spur- -gear J', a small gear, m, secured to the shaft M, properly operating in j )'urnal-bearings secured to the frame A. At its opposite end said shaft carries a -proper hand-crank, wherewith the operation of Winding is readily achieved.

The air-pump and aerometer, constructed and arranged in'combination with clock-work gearing, operates, therefore, as follows:

By the automatic action of' said clock-gearing (the suspended weight acting as motor) a .rotary motion is imparted to the vertical center-shaft F. Said motion so achieved is converted by its cam device G into a rectilinear reciprocaton motionand communicated to the slide and piston C of the air-pump.

The air-pump being double acting,l utilizing the upand-down stroke of its piston,'a continuous current of air is therefore discharged from'the air-chamber O1 and O2, and fed orforced into the air-receiver or aerometer D.

To effect a steady discharge yfrom said aerometer I place on top the same a suitable weight, fig; 1, suffi-` cient toovercorne the tension of the spiral spring D1; the said weight acting to relax the aerometer while it is receiving its supply of air from the pump B when ,automatic action, if necessary, before the complete exhaustion or discharge ,of an" from the aerometer n takes place.

My improved automatic air-pump is adapted for all purposesfor which'an air-punipisgencrally applicable, operating with perfect ease and uniformity,and.

by its use a. continuous and regular dischargeof air is at all times obtained.`

Having thus fully described mysaid invention,

Vhat I claini, anddesreto secure by Letters Pat-v ent, is

l. The air-pump' B, constructed as described in combination with the elastic air-receiver D, constructed as-described, for the purpose set forth.

' 2. The slide X, consisting of the upper cross-head E, rods e, lower cross-heads El EZ, secured to piston C, said slide, as described, having end rollers el cz and arranged substantially as and vfor the purpose set forth.

3. The shaft F, cam-device G, as described, arranged to operate between anti-friction rollers gzgs, cross-head E, in'combination with the slide 'X and piston O, to operate 4substantially as set forth.

4. The gearing devices J J k m, ratchet and pawl jj', shafts I K M, bevel-gears L L', when arranged 'substantially as and for the purpose set forth.

5. The air-pump B, piston-slide X, described, counter-poise H', shaft F, right-and-leit cani device G, when arranged in combination' with the air-receiver D and clock-work gearing, to operate as and for the purpose described. f

-In Vtestimony of said invention I haveH hereunto set my hand in presence of JOSEPH I. GALLAGHER.


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