US1216395A - Hollow-bolt construction. - Google Patents

Description

C. H. ATKiNS. HOLLOW BOLT CONSTRUCTION APPLICATION man APR.22.1916.

Patented. Feb. 20, 1917.

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CHARLES HENRY ATKINS, 015 SPRINGFIELD, MA$SACHUSETTS.

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Specification of Letters Patent. Pat erned Feb, 2(1), 191%,

Application filed April 22, 1916. Serial No. 93,035.

To all whom it may concern:

Be it known that T, CHARLns HENRY AT- Kins, a citizen of the United States of America, residing in the city of Springfield, county of Hampden, and State of Massachusetts, have invented a new and useful improvement in Hollow-Bolt Constructions, of which the following is a specification.

This invention relates to improvements in drying machines, either for cloth, paper or the like. In drying machines it is important that the bearings and packings are kept steam and water tight, not only to increase the production and output but also to lessen the cost of repairs and increase the efficiency of the plant as a whole.

The present invention relates to improvements for carrying off the water of condensation from the interior of a drying cylinder by means of a discharge pipe which extends into the cylinder and having its open inner end terminating near the lower side of the cylinder, the outlet end of the pipe passin through a hollow bearing box by means of which construction the drying medium, as steam, can enter the cylinder; means is also provided to permit the ready withdrawal of the pipe from the drying cylinder. A hollow bolt surrounds the pipe to provide a Vmeans for forming a water and steam tight packing or oint between the box and its bearing. lidy present invention, in brief, therefore, is confined to devices and means for making a steam and water tight joint between the cylinder shaft and bearing, and, to permit the easy removal of the discharge pipe from the cylinder when required.

The present invention is designed. to be used with the steam trap which is shown, described and claimed in my copending application filed of even date herewith for an improvement in steam traps under Ser. No. 93,034. r

Referring to the drawings which form a part of the present invention:

Figure 1 is a vertical sectional view of my improvement which is associated with the hollow bearing for introducing steam into the heating drum, the hollow bolt construction, and the spider or packing ring for forcing the joint packing material in place;

Fig. 2 is a detail view of a portion of the bearing box broken away and showing the discharge pipe passing through the bearing into the drying cylinder, the spider or ring for forcing the packing into place about the shaft which supports and drives the drying cylinder.

Referring to the drawings in detail 1 designates the drying drum which is suitably supported by means of the hollow shaft 2 that is driven in any suitable manner by means of the spur gear 3. The hollow bearing box 4, into which steam is introduced, as indicated by the arrows 5 and 6, allows steam under pressure to flow into the cylinder 1 through the hollow shaft 2. Extending through the shaft 2 and into the drying cylinder 1 is a discharge pipe 7, the inner end of which terminates near the lower side of the cylinder 1. Its outlet end passes through the shaft 2 and the hollow bolt 8 and the hub of the spider 9. This pipe serves the purpose of permitting the confined air in the cylinder 1 to be driven out by the incoming steam. 10 designates a cap that is connected to the bearing 41 by means of the threads 11. The hollow bolt 8 passes through this cap and is connected thereto by means of the threads 12. 13 is a nut that v is formed integral with the bolt 8 and by means of which the bolt may be rotated in the cap 12 by any suitable means, as a wrench. The inner end of this bolt engages the hub portion 1 1 of the spider 9. The arms of the spider are connected to a ring 15 which in turn enters the annular opening 17 between the shaft 2 and the packing box 4 for the purpose of forcing the packing material tightly against the shaft 2 to pre vent leakage of steam or water. In order to prevent the escape of steam or water along the pipe 7, the stufling box 18 is threaded on to the outer end of the hollow bolt 8 and suitable packing material 19, is placed therein. The incoming steam enters the drying cylinder 1 through the hollow bearing 4 and passes as indicated by the arrow 6 through the arms 9 of the spider through the passageway 20 into the cylinder 1. The air is driven out of the cylinder by means of this incoming steam pressure and escapes through the pipe 7, as indicated by the arrows 21 to a suitable trap, or other device.

It will be seen that when the hollow bolt 8 is rotated in the cap 10 the ring 15 is moved inward into the annular opening 17 to compress the packing material therein.

In order to remove the pipe 7 and the spider and packing ring 15 from the cylinderl and the hollow bearing box 4: it is only place and forforcing the packing material into the joint between the hollow supporting necessary to unscrew the cap 10, when both can be withdrawn.

From this construction it will be seen that I have provided a simple and inexpensive device for holding the discharge pipe 7 in diameter than the interior diameter of said shaft and extending through the bearing box into the drying cylinder, a cap having a threaded connection with the bearing box and a-threaded opening in the cap, said hollow bolt engaging the threaded opening of the cap and through which bolt the outer end of the steam outlet pipe passes, a spider, a packing. ring connected thereto and located at, the inner'end of the hollow bolt and through which the steam outlet pipe passes,

. said bolt serving the purpose for engaging thespiderand forforcing the packing ring against packing. material as the said bolt is screwed into the cap and against the spider of-said ring, said material being located in an annulanpacking receiving chamber between: thehollow shaft and the bearing box, whereby when the hollow bolt is rotated in the concentric opening the packing material maybe-forced inward by the packing ring.

'2; Ina device of the kind described, the

combinati'onwith a drying cylinder, a dischargepipe-extending into and near 'the.

lower side of the cylinder, a-hollow bearing box, a hollow shaft for supporting said cylinderandithrough which the pipe passes to provide an annular space around said pipe 'to'permit'the entrance of a heating medium,

as steam, a hollow bolt having threads on its external surface, for engaging a threaded opening in the hollow bearing box, a packingring'adapted to be engaged by said bolt for forcing the ring inward and a 'stufiing box on the-end of thehollow bolt to prevent theescape of steam from the bearing box.

3. A'device of the kind described comprising, incombination, a bearing box having an annular space to contain packing material, a

hollow'externally threaded bolt secured to the box by means of threads in a cap on the box, a steam pipe passing through the bolt, a stufiing box on the end of the bolt, a packing ring on the pipe comprising a ring portion, a hub, an arm connecting the hub and ring portion and adapted to be engaged by the inner end of the bolt for forcing said ring portion inward toward. the box as the bolt is rotated in said cap for the purpose of moving the packing material into said annular space between the shaft in the box and said'box, as described.

4. The combination in a structure of the kind described with a hollow bearing box for admitting a heating medium thereto, of a hollow shaft for supporting a drying cylinder to permit the heating medium to enter the cylinder, a pipe of less diameter than the shaft and passing through the shaft, a cap secured to said box and having a threaded opening, a hollow bolt surrounding a portion of the pipe for supporting the same, and means operated by the bolt for forcing the packing material between the shaft and the box.

5. In a device of the kind described, the combination with a metal drying cylinder and a hollow bearing box, of a hollow shaft secured to the drying cylinder and mounted in said box, there being an annular space between the-inner end of said shaft and said box for placing packing material of a compressible nature therein, a cap having screw threads on its inner end for closing the outer end ofsaid box, the cap having a threaded opening extending axially through the same to receive an externally threaded elongated hollow bolt structure, a steam outlet pipe passing through the hollow shaft and hollow bolt, a ring located in the annular space in which the packing material is located, the ring being connected to a hub through which the steam outlet pipe passes, arms for integrally connecting the ring and hub, the'inner end of the said bolt engaging the outer end of the hub, a squared portion on the outer end of said bolt for-the purpose of rotating the bolt for forcing the ring against the packing material, a stufling box on the outer end of the hollow bolt, all constructed and arranged as and for the purpose described.

CHARLES HENRY ATKINS.

Witness HARRY W. Bownn.

Copies of this patent may De-obtained for five cents each-by addressing the Commissioner of Patents, I Washington, D. 03

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