US393713A - Half to john a - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1. J. MGINTYRE.

\ SHIPS KEBLSON. No. 393,713. Patented Nov; 27, 1888.

N. FEYERS. Phola-Lflhagrapher. Washmgtoq. D.C

2 Sheets-Sheet 2.

(No Model.

J. MQINTYRE.

SHIPS KEELSON.

No. 393,713. Patented Nov. 2'7, 1888.

UNITED STATES PATENT OFFICE.

JAMES MOINTYRE, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE- HALF TO JOHN A. STETSON, OF SAME PLACE.

SHIPS KEELSON.

SPECIFICATION forming part of Letters Patent No. 398,713, dated November 27,1888.

Application filed October 24, 1887.

To all whom it may concern.-

Be it known that I, JAMES MOINTYRE, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in the Art of Ship-Building, of which the following is a specification, reference being had to the accompanying drawings, in which- Figure 1 is a plan of a portion of the hull of a vessel embodying my invention. Fig. 2 is a longitudinal section on line 2 2 of Fig. 1. Fig. 3 is a cross-section on line 3 3 of Fig. 1. Fig: 4 is a cross sectional view of a keelsonsection on line 44 of Fig. 1. Fig. 5 is a similar view showing plates attached to the keelsonsection.

My invention consists, mainly, in a keelson made up of sections, each having one or more cross-walls which are integral with its side walls, the sections being secured together end to end.

Other features of my invention are set forth hereinafter.

In the drawings, which show my invention embodied in the best way now known to me,A is a keelson'which is made up ofa series of see tions, at a, 8150., which are secured together end to end. The keelson-sections for the stern and prow each have but one cross end wall, I The sections for the intermediate portions of the keelson, however, each have two crosswalls,b,onewallateach endofthesection. The keel-sections have their side and end walls integral,aud are preferably of cast metal, though they may be made of molded pulp, if desired, and the sections are secured together end to end by fastenings d, some of which consist of bolts and nuts, while others consist of clamps and keys, as shown. The object of using the clamps and keys is to insure the tightness of the compound keelson A in stress of weather, when there might be some danger of the threads of the bolts being stripped, and of the vessel consequently leaking between the adjacent ends of the keelson-sections, as will be readily understood by all skilled in the art. The cross-walls b of the keelson-sections are best formed with recesses b on their outer surfaces, so that the joints formed at the junction of Serial No. 253,261. (No model.)

two keelson sections may be more tightly calked, the recesses being packed or filled with any material suitable for this purpose.

The keelsonsections shown in the drawings are provided with cross-piecesf,to sustain the ribs f, as fully explained in my patent, No. 367,828, dated August 9, 1887, and the plankingf is best secured to the ribs, as explained in that patent.

In order to 'more strongly secure together the sections a a, &c., and thereby enable the vessel built upon my new keelson to stand stress of weather, the bottoms of the sections a a, &c., are grooved longitudinally to receive keelplate D, which is secured to the bottom of the compound keelson by suitable fastenings, d. Keel-plate D is best made sufficientl y thick to project beyond the bottom of the keelson and to fit in a groove in the keel E, which is preferably secured tothe keelson A by a series of bolts, 6. In order to more certainly secure the keel E to keelson A,the sections a a, &c., are formed with shoulders I) and ears I) on their inner surfaces, and these shoulders and ears are bored to receive the bolts 6 through the keel E. The nuts e,bearing on the upper surface of the shoulders I) and ears 6*, serve to keep the bolts in place and to hold the keel against the bottom of the compound keelson, and the nuts 6 on bolts e,bearing against the under surface of the ears b ytend to prevent the bolts 6 from being moved inwardly when the keel strikes against rocks or the like, and so help to secure the keel in place.

Keel E is specially desirable in vessels whose hulls are to be coppered, as will be readily understood by allskilledin the art. Of course keel E may be dispensed with, if desired, in which case keel-plate D serves as the keel.

In Fig. 5, which is a cross-sectional View of my keelson with metal plates f secured to it, the plate D is the keel.

Keelsons of vessels embodying my invention are quickly and cheaply made, as will be plain to all skilled in the art, the cast-metal or molded pulp vessel-like keelson-sections being readily produced, easily handled, and quickly secured together, as will be plain to all skilled in the art, and by means of my invention I am enabled to produce strong and durable vessels of different kinds with economy of time and labor.

\Vhat I claim is- 1. In a vessel, the compound keelson herein described, made up 01' two or more separate sections, the side and end walls of which are integral, the sections being secured together end to end, substantially as and for the pun pose set forth.

2. In a vessel, the compound keelson herein described, made up of two or more separate sections, the end and side walls of which are integral, the sections being secured together end to end, and the end walls of the sections being recessed on their outer surfaces, substantially as and for the purpose set forth.

3. In a vessel, the compound keelson herein described, made up of two or more separate sections, the end and side walls of which are integral, in combination with a longitudinal keel-plate secured to the compound keclson, substantially as and for the purpose set forth.

4. In a vessel, the compound keelson herein described, made up of two or more separate sections, the end and side walls of which are integral, the sections being secured together end to end and provided with one or more cross-pieces to sustain the ribs, substantially as and for the purpose set forth.

J AMES MulNTYR-E.

W il nesses:

EDWARD S. Bmon, ."ionN it. Ssow.

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