US821926A - Air-compressor. - Google Patents

Description

K PATENTED MAY 29, 1906. H. B. CORNISH.

AIR COMPRESSOR.

APPLloATIoN FILED PEB. 2. 19b5.

2 SHEETS-SHEET l.

PATENTED MAY 29, 1906.

H. B. CORNISH.

AIR COMPRESSOR.

APPLICATION FILED PEB. z. 1905.

2 SHEETS-SHEET 2.

v 5714, r A "j" UNICria-:o srarns (PATENT OFFICE.

' HARRY B. coRNisH," OFMI'NNEAPOLIS. MiiuaEsoriA,l AssiGNoR or TWO- w To. all whom tuta/y. concern.-

Be itknown that I, HARRY B. CORNISH, of

V No. 821,926.

Minneapolis, Hennepin county, Minnesota,

have invented certain new and useful Im provements in Air-Compressors, of which-the ollowing is a specification. j

My invention relates to air-compressors designed particularly' for use in connection with a carbureter for supplying compressed airv thereto; and the object of the invention is to provide a positive/ and reliable compressor and one that is easily operated, of simple c onstruction, and strong and durable.

A further and particular object kof the invention is to provide a compressor wherein` all leakin and sticking joints and packing are entire y eliminated.

The invention consists generally in various constructions and combinations, all as here'- inafter described, and particularly pointed out in the claims.

In the accompanying drawings, form-ing part of this specification, Figure 1 is a vertical section of an air-compressor embodying my invention.A Fig. 2 is a vertical sectional f view of the lower or 'valve portion of the comressor. Fig. 3 is a horizontal section on the ine :n of Fig. 2. Fig. 4 is a detail sectional view ofthe pipes leading from the upper part ofthe compressor to the carbureter.

In the drawings, 2 represents a casing com posed of two sections having their contlguous edges provided with flanges 3, between which a dia hragm 4, of any suitable material, preferab) A pipe 6 leads from the top of the casing above the diaphragm to a carbureter (not shown) and is provided with a check-valve 7 and a branch pipe 8, having an air-inlet valve 9. The bottom of the casing has openings 10, through which air is admitted to the space beneath the piston'. y 11 is a casting centrallyarranged `with respect to the diaphragm and fitting within an o ening therein and secured to the edge of t e diaphragm around the opening by a plate 12. This casting'l and the diaphragm Aform the piston of the compressor. The

low depending stem 14 is centrally mounted stem l14 and is (provided with aca the vcup the edge o the dialy rubber, is secured by bolts 5. f lbelow the .diaphragm- THiRDsrO P. PETERsoN, 0F GLENWoonJMINNEsOTA. l

` .Am-ooMPnEsson. i

. Patented Maize, 190e.

` Ain the casting 11, andia mechanism o erated `byfluidressure, hereinafter descri ed, is

iprovided or raising thisstem and the casting thereon to compress .the air in the upper` part of the casing and force it past the checkvalve to thecarbureter. The stem 14' has a lon'gbearing-surfacef'15 in the bottom of the casing, and a pipe 16, secured to the bottom. of said casing, 'incloses the lower end 'of said stem. Port-holes V16 lead from the interior of saidpipe into the casing 2 to allow the free passage of airfrom one tothe other. A castingv 17 is provided below the said pipe, having a iange`18 at its upper end, betweenpwhich and a ring. 19 the edge of a dia hragm20, also of suitable material, preferably' rubber, is se"-n cured. The lower end of the pipe 16 fits within the ring 19 above'the diaphra in. A cup 21 is screwed onto thelower en 'of the 22, between which an 'phragm 20, .around a central vhole therein, is secured. This vcup and its diaphragm form a second piston of less area-than the one irst l described and upon which the fluid acts direct.

A rod 23 extendsthrough the cap 22 up into the stem 14 and is provided at its upper end with a button 24, between which and said cap a coil-spring 25 is-.arranged This s ring is put under compression 'b the initial) u ward movement of the4 diap agm 20 to aid in seating the inlet-valve and holding the same on its seat untilthe ressure is. relieved tube 26 is interposed between said s ring and the rod 23 and adapted to rest at its ower end upon said cap.V

The walls of the cup 21 are of sufficient area to form a' backing for the diaphragm 20 during the downward movement of the .operating r mechanism.

Below the'casting 17 isa shell 27, supported on a base 28 and having an intake-port 29 for air ror water communicating with a governor 30 and leading to a chamber 31 in said base. Awall 32 is rovided in the shell 27,

)having aport 33 a a ted to be closed by a valve 34, carried by t e lower end of a stem 35. yThe port 33 leads to a chamber 36, and a port 37 extends through the wall 38 to a chamber 39, that communicates With the eX- haust lor discharge pipe 40. .The valve-stem projects through the port 37,-and in place of providinga packing-box at' this point use'a diaphra m 41, of suitable material, preferably ru ber, secured at its outer edge between the wall 38 and a c'ap 42-andhavingfa central opening to receive'the valve-stem` vided ywithin the vcasting 17 in communication with the chamber 36 through a vertical port 46.V Water or air pressure is thus alowed t^ass around the diaphragm 41 into the chamber 45 and act upon the diaphragm 20 to raise. the pistons and compress the air in lthe u per part -of the casing n2. v The lower en of the rod 23 is connected to the upper end of the valve-stem, and a valve 47 is provided at this pointto normally'close an opening 48, leading to the exhaust-chamber39. H

" The operation of the compressor, assuming the parts to bein the position shown in Figs. 1 and'2, is as follows: Air or water being admitted through the port 29 will iow up throu h the valve 34, past the diaphragm 41, into tlgie chamber 45, and raise the diaphragm 20, and with it the piston 11, which'having a' much greater area'I than, the lower one will compressa larger volume of air. During the initial upward .movement of the diaphragm 20 the spring 25, as before-described, will be compressed, and when the parts have been elevated a certain predeternnned distance the tube 26 will engage the button 24 and, aided,

by the tension of the spring 25, lift the rod23 to unseat the exhaust-valve 47 and close the intake-valve 34.V When the intake-valve is closed, the assage of Huid into the chamber 45 will -be c ecked and the exhaust-valve being o ened willrelieve the pessure in said cham' er beneath f the diap agm 20, and

when -the pressure has been reduced suiciently the diaplhragms will descend by gravity and allow t e rod 23 and the-valves .connected therewith to return to their normal osition. As soon as the 'intake-valve has been opened the fluid `will flow through again into thechamber beneath the diaphragm 20 and the operation described repeated.

I claim as my invention- 1. Thecombination, witha casing having intakeand exhaust ports arranged one above another and intake and exhaust'valves, said intake-valve being normally open and said exhaust-valve closed, and said valves -having ,intake-valve, su

senese ment of' said diaphragm to aid 'inseatingsaid I stantially as described. 2-.` The combination, wltha casing having intake and exhaust ports and' valves therefor provided 'withr 'a stem or rod, the intake-1 valve being normally open and the exhaustvalveclosed, oa/diaphragm within said casing having anoenng to receive said rod, means interpose between said diaphragm and the free end of said rod foi-.causing the longitudinalamovement of said rodand the closing. of said intake-,valve and the opening of i' the exhaustv whensaid diaphragm 1s raised,

and anair-compressing diaphragm connected with said irst-'named "dla hragm and ef greater diameter whereby a argervolume of .l

air will be compressed.

l3. The combination, with a casing having v intake and exhaust ports and yvalves therefor, the intake-valve being normally open and the exhaust-valve'closed by avity, of a diaphragm located within said-r casing, a

" ',valve stemor rod projecting through said diaphragm and provided with a stop, a coilspring provided on said rod between said lstop and diaphra In and (put under com res 'movement o sai sion'by .the initia upwar dlaphragm, and a tube carried 'by said diaphragm withinfsaid Yspring and arranged to engage said stop during the final upward movement of said diaphragm to -yclose said intake-valve and open the exhaust.

4. The combination, with a casing having intake and exhaust ports and valves therefor, said valves having a common stem and one beine' 'normally open and the other closed, o a diaphragm provided on said stem between said ports and separating one from the other, and said casing having a port leading from said intake-valve .around said` diaphragm and said exhaust-valve, a second exhaust-valve, means arran ed to operate 'said valves when said secon has moved upward a certain predetermined distance, an area than said second diap agm and cated above `the same and connected therewith whereby alarger volume of air'will be compressed, substantially as described.

5. The combination, with a casing having intake and exhaust ports one above l/the other and valves therefor provided with a stem or .rod, said intake-valve being normally open and said exhaust-valve normally closed, and the exhaust-passa e communicating with said exhaust-port' eing located between said valves, of a diaphragm within said c'asin above `said valves, means arranged to e actuated by the upward movement of .said diaphragm for moving said rod to close said intake-valve and open said exhaust, and said casing being l rovided with va port leading from said inta ,e-valve to a I pomt beneath said diaphragm around said a third diaphragm Aof reater diaphragm provided in -said casing. above Vsai I vI'O exhaust-passage and' said exhaust-valve, substantlally as described.

6. The combination, with a casing having intake and exhaust ports and valves therefor, said intake bein normally open and said exhaust-valve close the said casing having an exhaust-passage communicating With said exhaust-port and bein between said valves, and a' port leading rom said inletvalve around said exhaust-valve, said valve having a stem connecting them one with another, and a rod forming a continuation of said stem, of a diaphragm inclosin said stem between said valves, a second diap ragm within said .casing above `said valves, and means arranged to be actuated by the upward movement of said second-named diaphragm to impart a longitudinal movement to said rod to seat said inlet-valve and open the exhaust, substantially as described.

7. The combination, with a casing having intake and exhaust ports and valves therefor, said intake-valve being normally open and said exhaust-valve normally closed by gravity, and said valves bein provided with a stern or rod, of a diaphragmavin an opening through which said rod exten s, a coilspring provided on-said rod and arranged to be com ressed by the initial upward movement o said dia hragm to aid. in seating said .intake-valve vw en said diaphragm has moved to a predetermined point, and a second diaphragm of greater area than said irstnamed diaphragm and. connected therewith, whereby a larger volume of air will be'compressed.

8. The combination, with a casing having intake and. exhaust ports and valves therefor provided with a stem or rod, said intakevalve being normally open and said exhaustvalve closed by gravity, of a diaphragm having an opening through which said rod extends, a spring provided on said rod and arranged to be put under tension by the initial upward movement of said diaphragm, and means operated during the final movement of said diaphragm for positively actuating said rod to seat said inlet-valve and open said exhaust-valve, substantially as described.

9. The combination, with a casing having intake and exhaust ports and valves provided with a rod, the intake-valve being normally open and the exhaust closed, of a diaphragm located within said casing above said valves and having an opening to receive said rod, means operated by the upward movement of said diaphragm for seating said intake-valve and opening said exhaust, a second diaphragm above and connected withv valve closed, the said casing having an ex- A haust-passage communicating with said exhaust-port between said valves, a chamber 45 above said exhaust-valve and a chamber 36 above said intake-valve, the said casing havin a port leading from said chamber 36 to sai chamber 45, of a diaphragm inclosing said stem between said valves and separating said chamber 36 from said exhaust-passage, a second diaphragm located in said chamber 45, and having a sliding connection with said rod, and means actuated by the u ward movement of said second diaphragm or imparting a lon itudinal movement to said rod to seat said in et-valve and open the exhaust, substantially as described.

In witness whereof I have hereunto set my hand this 26th day of January, 1905.

HARRY B. CORNSH. Witnesses:

RICHARD PAUL, C.- MACNAMARA.

Images