US411214A

US411214A - Derrick

Info

Publication number: US411214A
Authority: US
Publication date: 1889-09-17
Anticipated expiration: 1906-09-17

Description

(No Model.) l 4 Sheets-Sheet 1. W. E. CHAPMAN.

DBRRIGK.

No. 41 1,214. Patented Sept. 17, 1889.

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(No Model.) 4 Sheets-Sheet 2. W. E. CHAPMAN.

DBRRIGK.

110.411,214. Patented Sept. 17, 1889.

(No Model.) 4 Sheets-Sheet 3. W. E. CHAPMAN.

DEER-IGK. No. 411,214. Patented Sept. 17, 1889,.

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(No Model.) 4 Sheets-Sheetl 4.

W. E. CHAPMAN.

. 111111111011. i 110.411.214. Patented sept. 17, 1889.

ATTORNEYS.

UNITED STATES PATENT OEEICE.

IVILIIIAM E. CHAPMAN, OF BROOKLYN, NEV YORK..

DERRICK.

SPECIFICATION forming part ef Letters Patent No. 411,214, dated September 17, 1889.

Application filed April 10, 1889. Serial No. 306,713. (No model.)

.T a/ZZ whom, it may concern:

Be it known that I, WILLIAM E. CHAPMAN, of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Derrick, of which the following' is a full, clear, and exact description.

This invention relates to derricks, the object of the invention being to provide a derrick that shall be applicable for use in the raising of extremely heavy weights; and to the end named the invention consists in the particular construction and arrangement of parts, as will be hereinafter Inore fully described, and specifically pointed out in the claims.

Reference is to be had to the accompanying drawings, 'forming apart of this speciiication, in which similar figures of reference indicate corresponding parts in all the views.

Figure 1 is a perspective view of a derrick constructed in accordance with the terms of Inyinvention. Fig.2isacentralscctionaleleva tion of the derrick-frame. Fig. 3 is afront View of the Aframe, the boom being removed and the float being shown in section. Fig. #1 is an enlarged detail view of the lower end of the boom and the booIn-step. Fig. 5 is a detail view of the upper end ol' the boom, and Fig. t is a side view ofthe boom end.

In the specific construction shown in the drawings I have represented my improved derrick as it would appear if mounted upon a float or scow; butI desire it to be understood that the der-rick might be mounted upon a Vfixed base, or that it might be mounted upon a land conveyance.

In the drawings, represents a float or scow, upon which there is stepped an Aframe 100, said frame being made up of

masts

11 and 11, which masts are preferably formed from a number of longitudinal strips that are united by binding hoops or bands 12, the parts being strengthened by cleats 13, that are held to place by sectional bands 14., the upper ends-of the masts being connected in any desired manner, but preferably fitting within a cap 15 and being spaced by a block 1G, as shown.

To the cap 15, I connect guyropes 17, which are secured to chainplates 18, a proper tension upon the guy-ropes being secured through the medium of turn-buckles 19, that are arranged as best shown in Figs. 1 and In addition to the guy-ropes 17, I provide forwardly-extending struts or braces and rearwardly-extending struts or

braces

21 and 21", as Inany of these struts being employed as may be deemed desirable or advisable.

Although not positively essential, I prefer to employ a stiffening cross-piece 22, which is arranged as clearly shown in the drawings. In connection with the frame above de* scribed I employ a heavy boom 30, that is made from' a single stick or from a number ol' longitudinal sticks that are united by bands 31, outsideof which bands there are arranged strengtheningribs 32. To the lower end ot' the boom 30, I secure straps each strap being formed with an eye 31 and the extending ends of all ofthe straps being bent over so that the eyes will register. The straps are bent, as best shown in Fig. 4, to receive the eye 35 of the swivel-bolt 3U, which bolt is stepped in a heavy bed-plate S7, Inounted upon a proper foundation 3S. Connection between the eyes 31 and 35 is established by means of a heavy bolt 2. To the end of the boom there are connected blocks 39 and 40, over the sheaves of which blocks there is passed a heavy rope 4:1, which also runs over the sheaves of ablock 42, that is connected to the A-frame 100, the rope leading backward to a guiding-block that is carried by the A- frame and thence downward to the windingdrum, any proper arrangement of blocks and ropes answering' in this connection. To the end of the boom there is connected a fall and tackle 4.3, to which the object to be raised is secured. Various falls for controlling the boom are arranged as may be convenient.

Ey Ineans of such a derrick as the one above described I am able to raise very heavy weights, and, as I bring the weight beneath the apex ef the supporting-frame and above the center line or keel of the iioat, I am able to maintain the equilibrium of the derrick.

III practice I employ water ballast, controlling said ballast in any of the well-known ways. This derriek has been employed to raise sunken vessels bodily and to handle very heavy articles.

IOO

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. The Combination, with the swiveled eye- 5 b0lt-35 36, of the boom SO, the straps 33, secured to the boom and provided With eyes 34 in their ends, the said ends being bent so that the eyes Will register With each other and with the eye of the swivel-bolt, and the bolt Io 2, passed through the said eyes, substantially as described.

2. The combination, with an A-frame 100 and the swivel-bolt 3G, having an eye 35 and arranged betweenthe masts ll l1a ofthe said frame, of the boom 30, the straps 33, having 15 eyes 34 in their ends and secured to the boom by bands 3l, and the bolt 2, passing through said eyes, substantially as herein shown and described.

WILLIAM E. CHAPMAN.

\Vitnesses:

W. T. LETHBRIDGE, WM. C. ANDREWS.