US143998A - Improvement in gas-retort mouth-pieces - Google Patents

Description

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IMPROVEMENT -lrieAs-ut'ron'r1v1curia-PIECES.

Specification forming part of Letters Patent No. 143,998, dated October 28, 1873; `application filed October 15, 1873.u

Vllo all whom it may concern:

Be it known that I, Tnorms F. ROWLAND, of Brooklyn, Kingsl county, New York, have invented certain Improvements relating to Mouth-Pieces for Gas-Retorts, of which the following is a specification:

l make a frame-work in iron, of size and dimensions to lit over and be secured to existing mouth-pieces, and make the face or framework of a circular form; but this is not my invention, being set forth in those words in v the specification of an English patent grantedA and cooling does not materially increase or diminish the tightness of its fastening. A tiltmg catch 1s provided, which4 drops and secures the cross-bar immediately on the door being closed.

The following is a description of what I consider the best means of carrying out the i11- vention.

The accompanying drawings form a part of this specification.

Figure lis a face view. Fig. 2 is a horizontal section, and Fig. 3 a side elevation, partly in section. These figures represent the entire door and its adjuncts. The additional figures represent certain details on a larger scale. Both are side elevations. 1 tilting catch raised. This is the positionmaintained while the door is open. Fig. 5 shows Fig. 4 shows the the tilting catch down and engaged with the cross-bar, but the screw has not yet been tightened. Y

Similar letters of reference indicate like A is a mouthpiece, formed and mounted in the ordinary manner. B is an eXtra face-piece secured tightly on the front edge of the mouthpiece A. The several parts of the piece B will be indicated by B1 B2, &c. C is a door, turning on stout hinges c. lts section describes an adapted to engage-with and release the crossbar D. On the inside Vof the face-piece B, at the bottom, the casting is formed with a continuous descent to the extreme front, as indicated at B1. rlhis` causes' the coke to be all discharged as fast as it is raked out of the mouth-piece, and `provides no lodgnient for anylarge or small pieces. A conical bearingsurface, B2, is provided on the exterior of the facepiece-B, and within this a projecting lip extends a considerable distance forward, as indicated by B3. The' form of the door C allows this projecting lip to be received in it without contact with anything. The lip B3, by projecting forward of the bearing-surface B2, carries the coke so far forward that none of the gritty particles can touch or lodge thereon, The projecting lip B3 also receives all the blows and battering action due to unskillful handling of rakes or other .tools employed. rlhe projecting lip may be battered to an indenite extent without deranging the action. G is a tightening-screw, which performs the ordinary function of tightening the door. The ogee curve of the door not only provides an ample cavity in which the battered lip B:3 may ble received without contact therewith, but by its swelling iirst outward, and then nearer the center swelling to a corresponding extent inward, exerts an important miiuence on the effect of u changes of temperature. Were the swells entirely outward or entirely inward, the eect due to changes of temperature, and particularly the effect of unequal heating-heating the middle part more than the peripherywould be to carry the bearing G2, which receives the end of the screw G, further outward or inward, which would cause either too great strain on the parts by too much tightening the contact, or too little strain, so as to cause the joint'between the, door and the front piece to leak. The ogee form, rightly proportioned, causes the expansion outwardly of one part to balance the expansion inwardly of another part, so that the door being shut in a relatively cold lcondition maintains the same tightness after it has become heated, and also i races during the intermediate stages Iwhile the center is heated more or less than ythe periphery. The tilting catch E deserves attention. Itis formed not only with a hook-catch, El, at its proper working end, but with a projection, E2, at its opposite end, which latter performs an important function by receiving the impact of the cross-bar D when the door is slammed, and causing the catch to be immediately tilted over, and to engage with the cross-bar.

In preparing to open the door, after the screw G is slackened, the catch E is put out of use by simply knocking its iront end upward. Its gravity holds it up in the position shown in Fig. 4, and allows the door to be opened. When the retort has been emptied and recharged the simple closing of the door causes the cross-bar D to strike forcibly against the lower end E2 of the catch, and this blow immediately tilts the catch, and causes it to drop into'its working position, and catch hold of the cross-bar. The operator can rely upon this instantaneous engagement of the cross-bar, so that by the same movement with which he closes the door he can commence to tighten the screw G.

Some of the features here described may be used with advantage without the others; but I prefer the use of the whole, as here shown. None of the work is peculiarly delicate or fragile; and the entire improvement affords better than any means heretofore known to me `a durable, reliable, and tight-tting joint.

The door is preferably hung a little loose on its hinges, so that it may accommodate itself perfectly to its conical seat B2 on the mouthpiece. the door, and the corresponding surface B2 may be turned and finished with the degree of taper here shown, or with a considerable less or substantially as and for the purposes herein specified. j

2. The circular door C, formed with an ogee= section extending uniformly quite around the center, as and for the purposes herein specified.

3. The tilting catch E E1 E2, in combination with the cross-bar D, and arranged to operate relatively to the door C of the retort and the tightening means G, as herein specified.

In testimony whereof I have hereunto set my hand this lst day of July, 1873, in the presl enceof two subscribing witnesses.

THOS. F. ROWLAND. Witnesses:

J onN W. OGDEN, JAs. P. HALLETT.

The bearing-surface on the interior of

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