US1627324A - Silencer for gaseous currents - Google Patents

Description

19 May 27 A. H. GREEN 51mm FOR GASEOUS cunnmws Filed July 27. 1926 Patented May 3, 1927.

UNITED STATES PATENT ()FFICE.

ARCHIBALD HEWLETT GREEN, OF LONDON, ENGLAND, ASSEGNGR TO THE INTER- NATIONAL SILENCEB COMPANY (192(1) LIIVIIlIfiHilI), OI! tilfl'tl'NtlI"? 01F TIONDOTSI, ENGLAND,

.A. BRI'IQISH COMPANY,

SILENCER FOR GASEOUS GURRENTS.

Application filed July 27, 1926, Serial No. 1

This inicnlion is an iniprtwcnicnl in or niodil'ication of the ii'ivcntion which is the subject of Patent No. hffn hill, relating to nilclu'eir-i l'or gaseous currents, such as are pri'uluced in the exhaust oil internal combustion engines. itluch a. s zilenccr as di-iscribeijl in the specification oil the said Patent No.

lcomprised a 1' nsversel divisible 1 body or casing ot 'hndrical shape middle part and oil reduced dial'neter at its end into wl'iich was titted a filling coir sisting of a. permeable lion'iogeneous mass of metal of a resilient clnjiracter such as very narrov and thin strips oi flexible metal, on closed in a reticulated metal bus: in order E prevent the filling from bein con'ipress d towards the outlet end of the SllGl'lllGl. by the impact s, it w proposed in 'th No. hoiihtii' to provide an inner casing triiir'neniely divisible into two approximateiy conical shells each having at its base an annular enlarge ment to lit into sockets in the outer casing, each ol' the said shells being perforated, and the filling being enclosed within the said inner casing. .lhis arrangeinent, however, reduced the sluice within the silencer body available lor containiinz the filling, and it is the object ol the present invention to minimine such rcdiuiion while retaining the advantages of the inner casing.

:xccording to the present ii'ivention a per torated metal cup is inserted into the transversely divisil'ile silencer body, into which it fits at or near the inlet end, against which cup the bag containing the strip metal or other lilling is packed. A perform'ed. pa -aboloidal, conical, or sin'iilarly shaped shell. or inner casing ot the kind describi-id in the specification. of Patent No. 'l.,575,657 is secured within the silencer with its apex directed towards the outlet to receive the other end ol? the filling. The said. shell may be secured in position by means of a tlange ei'itering between the opposing rims or flanges ol the separate parts of the silencer body in the manner described in the specification of Patent No. 1,575,657. The bagcan thus be of greater capacity than that previously used. A large portion of the surface of the filling bag is thus in contact with the interior of the silencer body, and the gases enter and traverse the filling longitudinally,

25,215, and in Great Britain June 12, 1925.

the silenm-ur casing are indicated at A and B, the part A being; the one intended to be secured on the exhaust pipe. E indicates a tapered shell or inner casing hat ingits apex pointing toward the outlet and an enlargement e at its base secured within the rim oi the casing B, this shell E having perlorations at c A. perforated metal cup 1'1 is fitted at the shoulder a of the casii'ig A to overlap the end of the l'illin bag. 'lhe filling ll contained in a reticulatial metal bag K is press'id into the casing; A so that it against the can ll, after which. the shell E and casing 5 are placed in position and the later secured by the ring; 0 fitting over the enlarged. riins a, o of the casing members A and B, which ring; is then tightenec by means of a wing nut at o. The gases passing through the cup H traverse the filling longitudinall and escape through the perforations e and thence through the silencer outlet if.

What I claim and desire to secure by Letters Patent ot' the United States is 1. In a silencer tor gniseous currents, coinprisin r a body portion built of readily detachable sections, said body portion l'iaving a reduced neck at each end, and a filling consisting oi. a permeable honiogenous tan.- p lcd, nrass o'l. very narrow and thin ribbons of flexible metallic material enclosed in a metal bag made of toraininous reticulated sheet material adapted to lit bodily into the said body portion, the con'ibination there with of a rigid perforated inetal cup in serted into the neck at the end of said body at which the uses enter, the convex side of said cup facing the incomin gasesv 2. In a silencer for gaseous currents, COI11- prising a body portion built oi? readily detachable sections, said body portion hav ing a reduced neck at each end, and a filling consisting of a permeable homogenous tangled mass of very narrow and thin ribbons of flexible metallic material enclosed in a metal bag made of foraminous reticulated sheet material adapted to fit bodily into the said body ortion, the combination therewith of a rigid. perforated metal cup in serted into the neck at the end of said body at which the gases enter, the convex side of said cup facingthe incoming gases and an additional perforated metal member located between the filling and the outlet end of the silencer body.

3. 111 a silencer for gaseous currents comprising a body portion built of readily detachable sections, said body portion having: a reduced neck at each end, and a filling consisting of a permeable homogenous tangled mass of very narrow and thin ribbons 0t flexible metallic material enclosed in a metal bag" made of i'oraminous reticulated sheet material adapted to tit bodily into said body portion, the combination therewith ot a rigid perforated metal cup inserted into the end of said body at which the gases enter and of a perforated approximately conical shell secured within the silencer and adjacent the outlet end thereof with ite apex directed towards the outlet.

ARCHIBALD HEWLETT GREEN.

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