US429474A

US429474A - Gaff-jaw

Info

Publication number: US429474A
Authority: US
Publication date: 1890-06-03
Anticipated expiration: 1907-06-03

Description

(No Model.)

J. PARKER. GAFF JAW.

No. 429,474. v PatentedJune 3, 1890.

UNITED STATES PATENT OFFICE.

JOHN PARKER, OF CLINTON, CONNECTICUT.

GAFF-JAW.

SPECIFICATION forming part of Letters Patent No. 429,474, dated June 3, 1890.

Application filed February 24, 1890- Serial No. 341,498- (No model.)

To all whom it may concern:

Be it known that I, JOHN PARKER, of Clinton, in the county of New Haven and State of Connecticut, have invented new Improvements in Gaff-Jaws and I do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figure 1, a view in side elevation of a mainmast and gafi, the latl er being provided with jaws constructed in accordance with my invention. Fig. 2 is an enlarged broken perspective view showing the starboard gaff-jaw and the chock therein, the jaw and chock being shown in the positions which they will have when the gaff is hoisted to an ordinary peak. Fig. 3 is a detached view of the said jaw and chock, shown in inside elevation. Fig. 4 is a sectional view thereof 011 the line a b of Fig; 3, and Fig. 5 is a detached view of one of the bearings.

My invention relates to an improvement in gaif-jaws, the object being to provide their ends with chocks to take the strain imposed upon them and prevent them from being cramped upon the mast, which they chafe and cut, particularly when the vessel is running free or rolling.

With these ends in view my invention consists in gaff-jaws having their ends respectively provided with chocks and in certain details of construction andcombinations of parts, as will be hereinafter described, and pointed out in the claims.

As herein shown, the inner face of the outer end of each of the gafi-jaws A A of the gaff B of the mast C is provided with a chock D and with a bearing E, by means of which the same is secured in place. Each chock has a longitudinally-perforated transverse knuckle F, and each bearing a corresponding horizontal recess G, in which the knuckle is held by means of a pin H, passing through the same and through lugs I I, forming a part of the bearing and located at opposite ends of the recess therein. The ends of the bearing are perforated to receive bolts J .I, which pass through the jaws, each of which has a recess to receive its bearing and let the same down flush with its inner face. Under the construction described the bearings will be set at the inclination required to bring the chock in line with the mast when the gaff is hoisted to its ordinary peak,the pin or axis of the chock being at this time substantially horizontal.

It will be seen that by providing the end of each gaff-jaw with a chock interposed between it and the mast the jaws will be en tirely cleared from the mast, which will not, therefore, be chafed or cut by them nor by the chocks, which will conform themselves to the various positions of the gaff as the same is shifted and always bear squarely upon the mast, which they will not, therefore, chafe or cut,no matterhowgrcatthe strain thrown upon them when the vessel is running free or rolling. On the other hand, Without the chocks the jaws will be cramped upon the mast to which they will present their edges and chafe and cut the same, so that it must often be renewed. When the gaff is shifted from its ordinary position, the chocks still bear upon the mast, and, although not throughout their length, sufficiently not to cut or chafe it.

It is apparent that in carrying out my invention the form of the chocks and that of the bearings by which they are attached to the jaws maybe changed from the forms herein shown and described. I would therefore have it understood that I do not limit myself to the said forms, but hold myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of my invention. Having fully described my invention, What I claim is 1. The combination, with a gaff-jaw, of a chock pivoted to the inner face and near the outer end thereof on an axis arranged to be substantially horizontal when the gafi is hoisted to its ordinary peak, substantially as described.

2. The combination, with a gaff-jaw, of a bearing mounted in the inner face thereof and a chock pivotally attached to the bearing at a right angle thereto, the said bearing being applied to the jaw at the inclination required to bring the chock in line with the mast when the gaff is hoisted to its ordinary peak, substantially as described.

3. The co1nbination,with a gaff-jaw having a recess formed in its inner face and near its outer end, of a bearing set into the said recess and a chock pivotally secured to the said bearing, substantially as described.

at. The combination, with a gai'i jaw, of a bearing set into a recess formed in the inner face and near the outer end of the jaw and provided with a recess and with a perforated lug located at each end of the same, a chock provided upon its outer face With a knuckle described.

JOHN PARKER. \Vitnesse FRED C. EARLE, LILLIAN D. KELsEY.