USRE7965E - Improvementinrefrigerators - Google Patents

Description

Reissued Nov. 27,1877.

H. W. MCKNIGHT! Refrigerator Zgf?.

llllll! HARVEY lV. MCKNIGHT. *DE` IMPROVEMEN-m eemie'aaeons,

Specification fomzingpaxlof Letters Eatcxity 'Nm ggkdated Fehnxary 24,1574 Reissue No. 7,965, datei To all u-hom it may concern:

Be it known that I, HAuvEYWJ-lIcK-NIGHT, of Easton, in the county of Northampton and State of Pennsylvania, have invented certain new and useful Improvements in Refrigerators; and I do hereby declare that the following is a full, clear, and exact descrip-- tion thereof, that will enable others skilled in the art to which it appei'tains to make and use the same, reference being had to the accompanying drawings, and to the letters fof reference marked thereon, which form a part ot' this specification. f1

)Iy invention has for its object to producen constant circulation or current onc'oll ir 'in and through refrigerators and"preserv-inglhouses Without the employment ot' a tan or,

blower.

n v f l A The natule o1 my invention consists in the peculiar a'iangement, construction, and combination ofparts, as hcieinafter fully deecrillcll, havingrefereilce panticularly to the provision and arrangement ot air induction and eduction pipesl or passages, the former lacing,r packed in or passing through ice or other refrigerant, and discharging their contents into the preserving-chamher through or near the top of said chamber, and the latter having communi cation with said chamber at or near its iloor. In Figure l of thc tirayfing is illustrateda building to which my improvements are applied, Algeing the preserving chamber' or chambers therein. l5 represents the air-in- `duction pipe or pipes, made in tiny suitable torni-straight, coiled, o1' othorwiseand surrounded by ice or other refrigerant or cooling` material. The pipe (or pipes) l5 enter: thel chamber A at b, :it o1' ,near the top or c .lling ot' .said chamber, into which its cooled contents are discharged. y v.

C represents the aii'cductimi pipe or pipes, conununicating with the chainberik :it or near the floor ofthe latter, as shown at c. The eduction-pipc illustrated is in the form of a Siphon, of which cz is the apex, and 1 and c the short und long legs, respectively, the luttcr terminating in a bend, ci. y

The operation is asiollons: The uit' permitted to enter thc induction-pipe B istahcn from without the 3rcserving-chamber A, but with- November 27, 1577 application filed July 31), 12377.

vin nl@ house 'in einen said chamber is con.

tained, to avoid the heated atmosphere exterior to the' building. The air thus taken in its-passage' through the pipe B is cooled by ice or other.' refrigerant or cooling material surrounding saiil'pipe, as shown at B', and malice its ufayinto the chamber A, where, by reason of its gravity, it falls, expelling the warmer and lighter air through the eduction passage or pipe (j. The chamber A thus bef comes filled'n'itl'i cold air, which also rines in thesiphon to thc apex of the latter. The siphon (on a familier philosophical principle) at once discharges ite-contents into the lighter,

-because wai-incr, atmosphere outside, thereby producing a vacuum in the chamber A, which 1s filled nyeolel nir from the pipe i3,

The. operation.dMcrilu-l continues as long as the air in the Siphon is colder than the out! side utmofjaphere, und u constant circulation or current is thus kept up within the chalnber A.

'The operation of thi siphon is titled bythe weight ot' the cold heavy air within thc chamber, which, lacing admitted at the top ot' the lutter, in its l'uil expcls the lighter airtlsrough the edur-tioupipe, The rapidity of circulation in the chuznlier A depende upon the length of the outer leg of the siphon or the capacity of 'its disclturgieoritice and the temperature of Jie outer air. ,lience said cirfulntion muy be controlled by clongzating or contracting the long leg of the Siphon, or hycontructing 0r expanding the diameter oi' its nozzle or dis Char'feoriticc. v

l nawjdescrihcel the foregoing irriprovev-f` inclnts as appliml to a prt-serving.;house, but:A

lthey are equulljt applicable to refrigerators und ice-chests. When applied ton house, .said house and the preserx'ing, climalit-1', either ox"- both., may be packed with ice, or the refrigermit or cooling,r material muy he placed around the induction pipe or pipes li only.l z 'It nioiliticution parl iculnriy applicable to iceclicsts und ret'iigci'atorrs is shown aty Fig; 1" ie the chest or refrigerator, and l) a pan orn-v otln-r rcccpgaclc for icc. flo arc openingsperniittint; lsiftcinter atmosphere to pass into. th. pan l). pan, the air falls from thc lutter down into the, chest l, and, expelling the lighter air in said wt-coming cooled by thc icc in, said A chest through the ed11ction1' assage or Siphony E, rises in the latter', and discharges into* the youter atmosphere, in the manner already described. The @duction passage or Siphon, in this oase7 is arranged in the wall of the refrlg yPintor or chest, `communicating, by suitable openings `e and e', with the' prosel'vingeomlmrtment and outside atmosphere, respectively.

what I claim as my invention is In onib/ination'with a preserving-chamber or reiigeralor having an induction pipe Yor opening for admitting air at or naar` its top. or ceiling, -a siphon eduetion pipe or passage communicating Wit-lx the interior of said ehaxnf4 l ber, at or near its bottom or ioor, for the e'scape of air, substantially as set forth.

In testimony that l lclaim the foregoing I have hereunto set my hand this 19th day of July7 1877. i

HARVEY W. MCKNIGHT.` Witnesses:

M. ITANL. CoNNoLLY, Crus. F. ANHORN.

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