US1108984A

US1108984A - Apparatus for compressing air.

Info

Publication number: US1108984A
Application number: US73816812A
Authority: US
Inventors: Herbert H Frey
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-12-23
Filing date: 1912-12-23
Publication date: 1914-09-01
Anticipated expiration: 1931-09-01

Description

H. H. FREY.

APPARATUS FOR COMPBESSING AIR.

APPLIOATION FILED DBO. 2a. 1912.

151085984.. Patented Sept. 1, 1914.

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Herinner H. rREY, or cercado, immers.

.errane'rus non" coivrrnnssrnc ein;

License;

i v Specification of Letters atent.

Patented Slept. 1,319`

Application'iled December 23, 1812. Serial Ne. 738,168. y

To all 'whom 'it may concer/rt y Be it known that I, HERBERT H. FREY, a citizen of the United States, residing at Chicago, in the county of Cook and State of plllinois, have invented a certain new and useful Improvement in Apparatus f or C om# pressing Air, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying En' drawing, forming a part of' this specification.

Myinvention relates to apparatus for. compressing 'air and the object of my inven tion is to provide a device for thatl purr pose which itself is operated by air compres- \sion so that it may be applied to an otherwise idle cylinder ol2 an internal combustion engine and be operated by the air compressed 'by the piston in said cylinder.

git; The device of my invention is particularly adapted for use in the automobile industry, sinceit may be employed for. pumping up tires and may be operated automatically bymerelysubstitutingitjor one o'the spark 13a plugs of the engine' of an automobile.

My present invention .y is particularly concerned witlrfthe provision of certain irnprovements oyer the formof apparatus for compressing air shown and described in my Patent '.'No.'1,001,132 grantedA August 22d, 1911; My aforesaid patentdiscloses apparatus for compressing air comprising a socalled f breather valve. ln my present applicati'on I describe and claim an improved breather valve,7 which is illustrated in combination with compounding mechanism whereby extremely high pressures may be obtained in comparatively short periods of time.

el! Structurally my invention comprises a compression cylinder and a power cylinder, the former being of smaller diameter than the latter; each of said cylinders' having a piston member reciprocating therein. These piston members are mechanically connected and the piston in the power cylinder is subject to the compression formed in the engine cylinder with which it is associated. Under the influence of the compression formed in the engine cylinder, the piston in the power cylinder, which I shall call the power piston, is moved intermittently in one direction while the return movement is secured by the suction produced by the piston in the 55 engine cylinder, the air cushion which is formed in the top ofthe power cvlinder' and whatever effectV gravity may have.

The power piston and the pistonfwhicli operates in the compression cylinder, which I shall call the compressionpiston, mayif desired, be cast to forni one inte'vral" unit. f lLeading from below the powerf istontoa.' pointIA above the lcompression p' sten', is valved passage. This valvedf"pti,ssii" e has* communication with a stern'cerriedl'y thelower end` of thev casing ofthefpower'eylilp der, through which stem the powerylinder has communication with the engine cylinder, Due to the presenceof the valvdpa'ssage just mentioned, previously compressed iair at a pressure higher than jtmospliericpres-A sure, is passed from the engine cylinder into 4the compression cylinder'before theupiverd Imovement of the connected pistons` is 'coml menced. l Y l n 'it Located. in the stem which connects the: power .cylinder with theengine cylindexg .a valve whichl l call the breathervalve 15 My present invention is-'lperticulnrl'y'eoi cerned with certain improvementsfin7 Se so-called breather valve. This 1? breather 'l 'valve comprises e valve seat located 'fin the i side of the stem, a valve memberrlforisai'd seat, and e spring-for normally'retaining said valve member imposition upenjits'seat, said spring extending acrosi; the openin Aiin said stem and bearing against tlie'walof said stem at a point diametrically lopposite said valve member. i

My invention also has to dowith certain valved passages whereby air at atmospheric" pressure is a mitted to the compression 'cyliinder and whereby compressed air fis-passed Afrom the compression cylinder into a hose and thence to a tire which is to beiinfla'tedgor other container for compressed 'ain 'Cerf` tain cushioning devices vare provided to resi vent pounding of the pistons within t eii: respective cylinders.

These and other features of the device of my invention are disclosed in detail in the"- following description and are illustrated in the accompanying drawing in which the-dey vice of my invention and the engine cylinder associated therewith are shown in longitudi- 'it nal section. c

The power cylinder is illustrated at 1, and it will be seen that this power cylinder has a central boss 2, extending downwardly let . therefrom, said bossbeing provided with'a 1T reduced portion 3, externally threaded in order that said reduced portion may be screw threaded into the spark plug opening of a gas engine cylinder illustrated at 4. The piston for the cylinder 4, is illustrated at Cast integrally with the power cylinder 1, is 'the compression cylinder 6, which is of smaller diameter than the power cylinder and is disposed concentric therewith. The compression cylinder is provided with suitable cooling flanges `7, as shown. Located a short distance below the annular shoulder S, are a plurality of apertures 9, the purpose of which will be hereinafter described.. Located in the top of the compression cylinder 6, is a ball check valve 10, seating against atmospheric pressure, and a ball check valve 11, seating against s pressure within the vcompression cylinder 6. The air taken oft through the check valve 11, passes through a suitable nipple 12, to which is secured a hose 13, as shown.

Disposed within the power and compression. cylinders are the power and compression pistons, illustratedat 14 and 15, respectively. These pistons constitute an integral unit, as sho'wn. Each of the pistons is provided with suitable packing rings 16, as illustrated. Extending from a point below the power piston to a point above the com pression piston, is a central passageway 17, which is enlarged at 18, and 19, as shown. Located in the enlarged portion 18, of the passageway 17, is a ball check valve 20, seating against pressure coming from the power cylinder. This check valve comprises a ball normally held upon its seat by a spring, bearing against and disposed around a reduced portion of a plug 21, threaded into the passage 17, as shown. This plug is provided with a plurality of apertures indicated at 22.

Threaded into the central bore of the boss 2, is a projection 23, which, when the pistons are in the position shown in the drawing, is located within the enlarged portion 19, of the passageway 17, as shown. This projection 23, is provided for the purpose of cushioning the power piston on itsdown stroke. In practice there is necessarily'a slight clearance between this projection 23 and the piston 14, in order that air may leak around the projection and get under the power piston 14.

The central hess 2, is provided with a transverse bore intersecting the central passage therethrough. Located in this transverse bore is a tapered stop cock 2l, provided with a handlel 2.7, as shown. This stop f-oek is provided with a trz'insrersc passageway Q6, which when the .slop cock is in the posin tion shown in the drawings is in etl'eft a part of the' central bore through the [was 2, which boss constitutes the stein for the davife in question. he central llore through the boss is illustrated at 27. Threaded into the stop cock 24, as shown, is a valve seat 2S, provided with a flange 29, adapted to engage the boss 2. Bearing against the seat is a ball 30, which is normally held in pesition by means of aspring 301, extending directly across the central bore through the stem and bearing?,` ina suitable socket 31, as illustrated.

The operation of the device of my inven 'tion is as follows: 0n thcup stroke of the piston 5 within the engine cylinder 4, air is compressed above the piston and is forced through the stem, projection 2?, and valved passage 17, into the compression cylinder. When the pressure within the compression cylinder is equal to or substantially equal to the pressure within the cylinder 4, the valve 20, is seated. The pistons are then moved upward due to the increasing pressure within the cylinder 4, air leaking around the projection toa point below the piston 14. Due to the difference in the diameter of the power and compression pistons, the air within the compression cylinder is raised to a high pressure, and is taken off throughi check valve 11 and hose 13. When the po'wer piston 14 has passed the holes 9 in the wall of the power cylinder, air is trapped in the annular space above these holes, this air serving as a cushion to revent the power cylinder pounding against the annular shoulder 8. Upon the ldown stroke of the piston 5, the pistons 14 and 15, are drawn downwardly, due to the partial vacuum produced Aby the piston 5. At the same time air at atmospheric pressure is supplied to the engine cylinder through the breather valve. Upon the down stroke of the pistons, air passing in through the intake valve 10, prevents the production of a vacuum in the compression cylinder. When, upon the down strokenthe projection 23 enters the enlarged portion 19, of the passageway 17, 'a quantity of air is trapped below the power piston and serves as a cushion to prevent the power piston pounding against the bottom of the power cylinder. The next upward stroke of the pistonwiihin the engine cylinder again raises the power and compression pistons within their respective cylinders. Due to inertia and friction, the pistons 14 and 15 do not start upon their upward travel until a certain pressure is developed within the compression cylinder. The operation above-descrilml may be continued as long as the operation of the piston 5 within the engine cylinder 4, is continued.

lV hat I claim and desire to secure by Letters Patent of the United States is:

1. In a. device of the class described, a pair of differential cylinders, connected pistous in said cylinders, the lower end of the larger cylinder being provided with a stem having :L breathe? v "Y n. matween .nm

d passage. and the said bi' ,niihac ml va? comprwlgg :1 a @ne 51d@ mi Sunil paging@ n, 'v mamma;

a nd n, CoxmfzbsSs f homing lve member against Gang ocme Wlthm vise ik@ dass escrmd, a a, psgcn in said cylinder, ,Q 5f ich@ iowa? end @T sac cyhmagh said sten, and a 'iii @Teather Halve comprisbeer :md aspring norma-ily v ha, number against its seat,

valve mem )er mol spring beng'oc'ad in 'Lila gmssag@ through Suid siem.

.in Wimss wr-faul?, hereunto subscrbe