US1607003A

US1607003A - Exhaust-pipe tailpiece

Info

Publication number: US1607003A
Application number: US72875A
Authority: US
Inventors: King Robert Owen
Original assignee: BELL S UNITED ASBESTOS Co
Current assignee: BELL S UNITED ASBESTOS Co; BELL'S UNITED ASBESTOS Co Ltd
Priority date: 1925-09-18
Filing date: 1925-12-03
Publication date: 1926-11-16
Anticipated expiration: 1943-11-16

Description

Nov. 16 192s. 1,607,003

R. 0. KING EXHAUST PIPE TAILPIECE Filed Dec. 5 1925 p of the members 2 and 3.

i (and is preferably less) than the effective or adapter 11, (see Figure 7),

' 12,13 and or strips seated in the recesses 8 and 9 in the longitudinal members 2 and 3. These linings areseparate at their inner ends by means of the clamps 20, 21, secured by

rivets

22, 23 to the interior The linings 18, 19 are continued through the exit 14 from the diffuser chamber and are shown anchored outside the said exit by means of rivets 24, 25; these rivets pass through cross strips of stiffening material 26, through the end of the asbestos 18 or 19 which is represented as folded back over said strip 26, and through the lip-or

flange

5, 5 The-asbestos between the

anchorage points

22, 23 and 24, 25, is arranged, loosely to act in a blanketingmanner upon the stream of gas passing through the attachment B. The asbestos tapes may be stifl'ened at their edges by inserted wires if desired, such wire stifiening for asbestos being well known.

Throughout the length of the diffuser chamber 10 the cross-sectional area of the passageway formed by the conjoined recesses 8-9 taking into account the linings 18, 19, is such that it is little if any greater area of the exhaust port or ports from any one cylinder which discharges into pipe A. The area of the effective outlet of the asbestos-lined exit 14 is therefore preferably somewhat less than that of the eflective area of the said exhaust'port.

By reason of the outwardly flared walls the greater depth of the recessed members 2, compared with the depth of the recessed members at the part comprised between the

arallel walls

15, 16 viz, the diffuser chamer, I am enabled to use asbestos tapes of constant width throughout their length. -The cross distance from the centre of .the

flange 6 to the centre of the flange 7 following the sides and base of the member 2 or 3 is the same throughout the length of the attachment. In other words, because of the tapered but flared walls of the antechamber parallel-sided tapes 18 or 19 adequately line the members 2 and 3 at for example, line 6-6 of Figure 5 as well as at line 7-7 of that figure. Further by reason of the angle between the walls of the tapered adapter chamber 11 and the diffuser chamber. 10, the asbestos tapes which are anchored at their extremities fit intermediate of their length snugly against the recessed members 2 and 3 and adhere loosely to the said members in the manner of a blanket.

The attachment B is with advantage secured to the pipe A in the following manner. A nut 17 is screwed upon the screwthreaded end of pipe A and is pinned ereto at 17. The attachment B is provided around its inlet 1 with inturned flanges 27,

and are shown anchored 3 at that part of the attachment wardly This washer 32 is an annulus with a cy-"' lindrical portion 32 see Figure 5, and has diametrically opposite recesses 33 formed in said cylindrical portion. These recesses 33 act as jaws to engage the

continuations

29, 30 of the facing

flanges

6, 7, and in this manner the locknut 31- when screwed up against the washer 32, clamps the inturned

flanges

27, 28 against the pinned nut 26 which latter serves as an abutment.

By slacking back the nut 31 and washer 32 and then removing the screws 4, the members 2, 3, can beseparated for inspection, cleaning or. relining purposes.

In a modified form of the invention a plurality of these hollow attachments B may be secured together in series or tandem inturned screws 4 the exit from one diffuser chamber 10 leading into the tapered adapter chamber '11 of another. As shown in Figure 9, three of these attachments are combined together in prolongation one of another, and in this way I prevent a core-like stream of gas from proceeding uninterruptedly through the device.

It will be noted from the foregoing description that the adapter chamber is of such a shape that in the direction of the exhaust flow, its cross section is tapered inon one diameter and is flared outwardly on a diameter at right angles to the said first diameter.

In other words, the op-* positely facing

side walls

12, 12, 13, 13'are.

divergent, and the oppositely facing top and bottom walls. of the adapter chamber are convergent,both' the divergent and convergent walls being included within the len th of-the adapter chamber.

fiaving thus-described my invention what l claim is 1. An exhaust-pipe tail iece comprising a plurality of longitudina 1y recessed mem bers, each of said members including a portion of a diffuser chamber and a portion of an adapter chamber,

means for detachably assembling said members together with their recesses conjoined to afford a longitudinal passageway through the adapter chamber and the diffuser chamber, said adapter chamber bein of such shape that in the direction of t e exhaust flow, its cross section is tapered inwardly on one diameter and is flared outwardly on a diameter at right an gles to the said first diameter, means for securing said tailpiece to the exhaust pipe, and

a lining of asbestos material secured to each Patented Nov, 16, 1926.

UNITED STATES 1,607,003. PATENT OFFICE.

ROBERT OWEN KING, O13 LONDON, ENG-LAND, ASSIGNOR' TO BELLS UNITED ASBESTOS COMPANY, LIMITED, OF LONDON, ENGLAND.

EXHAUSTPIPE TAILPIECE.

Application filed December 3, 1925, Serial No. 72,875, and in Great Britain September18, 1925.

This invention relates to an attachment to the end of an exhaust pipe from an internal combustion engine. object to'provide a device which will damp out the sound vibrations ,which make exit from the exhaust pipe, and will also be divisible for inspection, cleaning or relining pur oses. I

y attachment consists of a hollow device including a shallow box-like, diffuser chamber with a passageway extending through the whole device and a slot-like exit from the diffuser chamber, which box is formed of a plurality of juxtaposed and longitudinally recessed members each lined with asbestos. A length of asbestos is laid longitudinally of each member and is removably anchored at its ends to said member. The asbestos, except at its anchorage pointsis loosely laid or arranged in position in the recessed. members which constitute the hollow device. so as to effect-a blanket-action on the sound vibrations.

This device differs from the ordinary exhaust box or muffler inasmuch as, in the first place. the silencing is effected mainly in the slot-like exit and in order that this may be so it is necessary that a high velocity of the "exhaust gas be maintained in this part of the device so the area of cross section of this slot-like exit must be little if any greater (and preferably less) than the effective area of the exhaust port or ports from any one cylinder; in the second place, the device is formed of aplurality of parts assembled together and each lined with asbestos arranged longitudinally of the passageway. Moreover, the present invention is more in the nature of a fish tail or similar attachment to the exhaust pipe.

Other features of the present invention will be hereafter setout in the claims.

I Upon the accompanying sheet of drawings: Figure 1 is a plan of the device and Figure 2 is an elevation of the exit end thereof. Figure 3 is a side elevation and Figure 4 is an elevation of the inlet end to said device. Figure 5 is allongitudinal sectional elevation of Figure 3, and Figure 6 is across section on line 6-6 of Figure 5. Figure 7 is a plan view of one of the recessed members without its lining, and Figure 8- is a cross section on line 8-8- of Figure 7. Figure 9 is a diagram in longitudinal sectional elevation of a series of It has for its these attachments arranged in series or tan-v dem.

The exhaust pipe of an internal combustion engine is indicated at A. To this pipe members 2 and 3. These halves are conven-- iently secured together by screws 4: which pass through the facing

flanges

6 and 7 of the halves or members 2 and 3. These members 2 and 3 are provided at their ends remote from the exhaust pipe A with lips or

flanges

5, 5 The members 2. and. 3 are formed of metal and may be castings, stampings or metalv shells recessed lon itudinally as at 8 and 9 so that when t e said recesses 8 and 9 are conjoined or juxtaposed, a longitudinal passageway 8-9 through the device is obtained with an inlet 1 and exit14. These recesses 8 and 9 in the halves 2 and 3 are of such a shape" that -when conjoined they form, adjacent to the inlet 1 into the device, a circular or' quasi-circular passageway. These recesses 8 and 9 are further so shaped that as they proceed towards the exit end of the attachment B, the shape of the passageway changes to that of an oblong slot which may be of rectangular cross section, as will be seen in Figures 2 and 5." The walls of the members 2 and 3 are tapered down as at C inone plane and outwardlyflared as at D in a plane at right angles to the first plane, as will be understood from Figures 1 and 3.

The halves or members 2, 3, of the hollow device are shown as an ante-chamber or tapered adapter chamber (11 in Figure 7 with outwardly

flared walls

12, 12, 13, 13, leading to the diffuser chamber (10 in Figure 7), this diffuser chamber having

parallel walls

15, 15, 1,6, 16. The exit 14 from the device B is in the form of an oblong slot of considerably greater width than depth. The adapter 11 serves to connect the oblong section passageway through the diffuser chamber 10 with the inlet 1 into which the exhaust gases enter.

The passageway through the hollow attachment formed by the conjoined recesses 8 and 9 of the assembled halves 2 and 3, is lined with asbestos, these asbestos linings 18, 19 being preferably in the form of tapes of said longitudinally recessed members,

said linings being securedpnly at their ends and, intermediately thereof being held loosely against the interior of the longitudinally recessed members.

2. An exhaust-pipe tailpiece comprising a plurality of longitudinally recessed metal shells having facing flanges whereby said shells may be secured together, means for rigidly and detachably securing the assembled device to said pipe, an as estos tape lining secured at its ends inside each of said shells, said shells being shaped to form' when assembled a hollow body having at an intermediate portion of its length an outwardly flared passageway, and at its extremity a slot-like exit, said outwardly flared passageway being tapered from the inlet towards the said exit.

3. An exhaust-pipe tailpiece comprising an elongated hollow member divided longitudinally in halves, means for detachably securing said halves together, means for operatively connecting said tailpiece with the exhaust pipe, said hollow member including a shallow diffuser chamber with parallel walls and an oblong exit, an asbestos lining for each of said halves, said linings being secured in position only at their ends, and said hollow member including also an adapter chamber leading to said diffuser chamber and having a pair of oppositely facing walls converging in the direction of the exhaust flow, and another pair of oppositely facing walls diverging in the direction of the exhaust flow, said-converging and diverging walls vbeing included within the length of the adapter chamber and merging grit the walls of the shallow diffuser cham- 4. An exhaust pipe tailpiece comprising an adapter chamber and a shallow diffuser chamber, said diffuser chamber having side walls and top and bottom walls, said chambers being aligned and formed in halves longitudinally secured together, the halves of said adapter chamber beiiig of trough section with divergent side walls and convergent top and bottom walls in the direction of the exhaust flow, said divergent and convergent walls merging with the walls of said diffuser chamber, parallel-sided ashes tos linings secured to the interior of said trough-section halves, and means for'detachably securing said tailpiece to an exhaust pipe.

5. An exhaust-pipe tailpiece, comprising an adapter chamber and a shallow diffuser chamber, said diffuser chamber having side walls and top-and bottom walls, said chambers being in prolongation one of the other and formed in halves longitudinally secured together, the halves of said adapter chamber bcin of trough section with outwardly flared side walls and inwardly tapered top and bottom merging with, respectively, the side, top and bottom walls ofthe shallow diffuser chamber, outwardly flanged terminal lips on said difl'user'chamber forming a slot like exit from the diffuser chamber, and longitudinally arranged asbestos tapes of constant width throughout their length, said tapes being secured as linings at one end to the interior of the halves of the adapter chamber and at their other end inside the terminal lips upon the diffuser chamber.

6. An elongated exhaust-pipe tailpiece comprising an adapter chamber and a shallow open-ended diffuser chamber, said diffuser chamber having side walls and top and bottom walls, said chambers being formed in halves with facing'flanges longltudinally secured together, the halves of said adapterchamber being of trough section with outwardly flared side walls and inwardly tapered' top and bottom merging with the side walls, and top and bottom of the shallow diffuser chamber, asbestos linings secured to the said halves of said chambers, an end wall at the inlet end of each half of the adapter chamber formed b -.inturned flanges integral with said facing anges, and means for removably connecting the halves of the adapter chamber with the exhaust pi e, said means including an. abutment upon t e pipe and a lock nut and washer for holding said end walls against said abutment.

In witness whereof I have signed my nameto this specification.

ROBERT OWEN KING.