US1000266A - Means for stiffening boiler-heads. - Google Patents

Description

A. INOKUTY.

MEANS FOR STIFFENING BOILER HEADS.

APPLICATION FILED um: 29, 1910.

1 00,266, Patented Aug, 8, 1911.

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UNITED STATE PATFEJT @FFKQE.

ARIYA INOKUTY, OF TOKYO, JAPAN.

MEANS FOR STIFFENING BOILER-HEADS.

To all whom it may concern:

Be it known that I, ARIYA INOKUTY, a subject of the Emperor of Japan, residing at 4:0 Nichome, Nishiharamachi, Koishikawaku, Tokyo, Japan, have invented a new and useful Improvement in Means for Stiffening Boiler-Heads, of which the following is a specification.

This invention relates to improved means for stiffening boiler heads to enable them to withstand the internal pressure.

One of the objects of the invention is to provide improved stiffening means designed to enable the use of boiler plates or heads of high pressure boilers, of a lighter weight of plate, than has been heretofore possible.

A further object of the invention is to stiffen the heads of boilers without employing means extending longitudinally of the boiler from head to head.

A further object of the invention is to lessen injurious straining action arising from the difference of expansion or contraction between the flue tube and the boiler shelf or head and also to render the interior of the boiler more accessible for cleaning purposes.

Further objects of the invention will hereinafter appear in the description of the accompanying drawings and in the specific :tement of novelty in the claim.

. In the drawing :Figure 1 is a sectional view on line 11 of Fig. 2. Fig. 2 is a iongitudinal vertical section of the boiler illustrating the use of my invention in connection therewith. Fig. 3 is a sectional view on line 3-3 of Fig. 1. Fig. 4: is a sectional view on line 4-4 of Fig. 1.

Like numerals of reference designate similar parts throughout the different figures of the drawing.

As illustrated the means for stiffening boiler heads 1, consists of a plurality of independent elements connected with each head. In practice it has been found that gusset plates, or angle plates, provide a simple and effective stiffening means.

Referring to Fig. 1 it will be seen that a plurality of elements 2, 3, 4:, 5, 6, are dis posed on the inside face of the heads 1 and are spaced apart from each other in a suitable manner to distribute the strengthening functions thereof. Said elements are also spaced apart from the outer and inner junctures, 7 and 8 respectively, of the head 1 with the boiler shell and tubes.

Specification of Letters Patent.

Application filed June 29, 1910.

Patented Aug. 8, 1911.

Serial No. 589,528.

Referring to element 2, the same consists of two angle or gusset plates 9 and 10 which are shown secured together by rivets 11 and also secured to the head 1 by rivets 12. The outer margins 13 of the element 2 are spread so as to diverge from the point of juncture of the plates 9 and 10 for the purpose of further stiffening the same. Furthermore the plates 9 and 10 are preferably not bent at a right angle but are curved, as at 14, so as to increase the strength thereof.

By reference to Fig. 1 it will be seen that elements 3 and 5 are relatively shorter than element 2 and elements 4 and 6 are rela tively shorter than elements 3 and 5 and while this arrangement and proportioning of the elements are well adapted for the type of boiler shown it will be understood that wide variations of arrangement and proportioning may be and can be utilized for boilers of different types without departing from the spirit of my invention. In the present construction the plate 15 of element 3 is longer than plate 16 and likewise plate 17 of element 4 is longer than plate 18 and it will be seen that this arrangement gives the widest possible latitude of disposition of the stifi'ening elements to accommodate the gradual reduction of surface of the heads 1 from a point above the tube to a point toward the sides thereof.

It will be seen that the widest possible latitude of expansion and contraction of the two heads of the boiler may take place without one influencing the other. If the tube should extend at one end more than at the other the expansion or contraction of the head nearest to such end would not affect the other heads. Furthermore it will be seen that the heads are efiectively stiffened by a relatively small amount of material there-' faces of said heads is disposed on one side of the flue than on the other side thereof and a plurality of stiffening devices for head and the remaining flange of such pair such greater area of each head, said de secured to each other. 10 vices being radially disposed with. respect to In testimony whereof I affix my signature the longitudinal axis of said shell and each in presence of two Witnesses.

5 device being independent of and uncon- ARIYA INOKUTY.

nected with the remaining devices, and each Vitnesses: device comprising a pair of angle pieces UHACHI ISHINARY, having two of its flanges secured to the IIARUHIKO IIDA.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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