US63289A - nickekson - Google Patents

Description

@with gisten atrat titre.

Letters Patent No. 63,289, dated [March 26, 1867.

MPROVD SHPS DAVIT AND WINCH.

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Be it known that I, Captain DV P. NICKERSON, ot' Cleveland, in the county of Cuyahoga, and State of Ohio, have invented certain new and -usei'ul improvements in a Ships Davit and Winch combined; and I do hereby declare that the following` is a full and complete description of the construction and operation of thc/same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure l is a top view et" a section of a vessel. A

Figure 2 is a longitudinal vertical section.

Figures 3 and 4 are detached sections7 to which reference will be made.

Like letters of reference refer to like parts in the views.

A, iig. 2, is a davit, which is constructed of iron or other suitable material, and oi' the shape indicated in the drawing, and which is placed either upon the main rail or monkey rail of the ship, as circumstances may determine. The inner end of the davit is provided with a number of teeth, B, in which Works the pinion C, iig. i

This pinion is not fixed to the shaft D, upon which it is placed, out free, so that the shaft can be made to siide through it, backward and forward, as will hereafter be shown. E is a clutch iixed to the'shatt, and by which the pinion is operated, said pinion being provided with an appropriate hole, F, fig. T42, to which the clutch is litted. G, fig. 2, is a stayin which the shaft is supported andjournalled, the outer end having its bearing in the side oi' the vessel. H is a winch secured to the shaft, and to the inner side of which is attached a ratchet-wheel, provided with a pawl, J.

The practical operation of the davit is as follows: As shown in the drawing, the davit is not projected beyond the stern of the vessel, but may be, as indicated by the dotted lines K, iig. 2, by the pinion C, which. is operated by the shaft and winch referred to. By this it will be evident that the davit can be run out to any desirable distance, as the size of the boat to be suspended may determine. The davits on being run out are then secured in position by the dog L, iig. 2, which is dropped into the teeth B referred to; the boat is then raised by pulleys suspended from the davits, the line of which is passed around the winch; the ciutch is then drawn ont from the pinion, as shown in iig. 3. New, on turning thewinch, the boat is drawn up and secured by the pawl and ratchet above described.

The advantages derived from this arrangement of the davits are the facility, ease, and convenience of raising and lowering theboat, as it can be done in a much shortcrtime, with greater eas'e and convenience, than in tho old way. When the davits are not in use they can be drawn in out ofthe way; hence the danger of their being broken when in port, and which is by no means an nnfrequent occurrence, is by this means whollyavoided, as they are entirely out of the way, as shown in fig. 2. This arrangement of the davits is much neater, and as they are constructed of iron are more durable; they are easily adapted to any vessel, and can be taken from a worn-out one or a wreck and used in another. Also, by this arrangement of the davits, one hand alone can raise the boat, whereas in the oid way a number are required for that purpose. The position of the Winches vsuoli that'they can be used to great advantage for other purposes than the one specially designed, as the moving ofthe vessel along the dock, raising freight into or from the hold, Src.

What I claim as my improvement, and desire to secureby Letters Patent, is-

'lheadjustable sliding davit A, pinion C, asarranged, in combination with the adjustable shaft D, clutch E, and winch H, for the purpose and in the nanner` substantially as set forth.

lD. P. TIGKERSON.l

Witnesses W. H. BURRIDGE, FRANK ALDnN.

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