US58740A - Improved ship s windlass - Google Patents

Description

UNITED STATEs PATENT OEEIGE.

VILLIAM GOODMAN, OF ST. JOHN, NF4T BRUN SVIOK.

IMPROVED SHIPS WINDLASS.

Specification forming part of Letters Patent No. 58.740, dated October 9, 1566.

To all whom it may concern:

1Be it known that I, WILLIAM GOODMAN, of St. John, New Brunswick, have invented a new and useful Improvement in Vindlasses; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1, Sheet l, is an elevation, in side view, of a ships windlass made according to my invention. Fig. 2 is a plan view, a portion of the apparatus being shown in horizontal section on the line .fr of Figs. l and 4. Fig. 3 is a detailed plan view of a horizontal section through the capstan on the line y of Figs. l. and et. Fig. 4, Sheet 2, is an axial section through the capst-an. Fig. 5 is an under-side view of the coupling on the spindle of the capsta-n. Fig. 6 is a detailed top view of the cam-plate which operates the pawl-levers of the windlass.

Similar letters of reference indicate like parts.

This invention relates to ships windlasses. The shat't is like t-hose in common use, with two ratchet-wheels and a center cylinder with ratchet'teeth for detents. The ratchet-wheels are operated on by a pair of jaws with suitable pawls attached to them, the jaws being placed at the end ot' wrought-iron levers, each of which has on its inner end a roller iixed on a cast-iron shoe, such rollers working on the surface of a horizontal cam, which is connected to the spindle of the capstan by means of a couplingcollar and keys. This couplingcollar is so made and applied that by reversing the capstan the keys are forced out of their places and the capstan and windlass be come disconnected.

The horizontal cam is so made as to take all the back motion of the windlass, the inclination of those faces of the. cam along which the rollers of the pawl-arms descend being more abrupt than its lifting-faces, whereby the back motion of the windlass is prevented.

In lifting anchors no loss ot speed takes place, as in windlasses of ordinary construction.

For the purpose of obtaining a higher speed in rotating the capstan I have provided two heads, the upper one being fitted with a square socket to the upper end of the spindle, which is made square, so that they will move togeth er. The lower head has internal cog-teeth on the lower part, which engage gear-wheels that are placed around the spindle, so as to turn a gear flxcd on the spindle. The top head is worked toward the right and the lower one toward the left.

When the capstan is uncoupled from the windlass it can be used as a common capstan by the bars being placed in the lower head, and as a power capstan by heilig placed in the upper head.'

The letter A designates a capstan, whose base A' is fast to the frame that supports the apparatus. O is the spindle, whose foot is supported below in a properbearing or step. The base A rises high enough above the frame to form a receptacle or chamber which incloses a portion of the gearing which communicates motion from the lower head of the capstan to the spindle O, the bottom of said chamber beA ing composed of radial bars O O1, which ex tend from the center to the sides of said base, the wider bars, O, furnishing` supports for ver tical shafts which carry the gear-wheels M N, said shafts being three in number, and being placed around the spindle O at equal distances apart. Each shaft has a gear-wheel, M N, the lower one, N, 011 each shaft engaging with a pinion, r fixed on the spindle, and the upd per one, M, which is of larger diameter than the gear N below, being' engaged by the teeth P, formed on the inner circuinferencetof the lower part ot the head Bl. The upper ends of the shafts of the said wheels M and N are held in a 'circular plate, O2, which is loose on the spindle O and serves to keep the shafts upright, the plate being kept in place by the crossba-r B2 of the lower head, B1, through which bar the spindle O passes. The lower head has the usual holes in its sides to receive the capstan-bars.

rThe upper head, B, is made with a square socket or opening through its center to fit the square upper end of the spindle, to which it is contined by a nut. The head B has radial holes to receive bars for operating it. Vhen this head is operated the spindle is rotated at the same speed with' the head; but when the lower head is operated the spindle is rotated at an accelerated speed, owin g to the cog-teeth P and the gear-wheels M N N', the rate being determined by the relative diameters of said wheels.

The spindle C has a hollow cylindrical coupling, I), secured to it by a set-screw, R, so that itrests on or comes close to the upper collar, G, of the cam-,plate F,hereinai'ter described.

The coupling is seen in side view in Figs. l and 4t and in under-side view in Fig. 5. It has on its lower edge three radial teeth, E, which are square ou their front sides, but are curved on their backs, so that each tooth forms a curvilinear triangle, projecting like a flange from the cylindrical body of the coupling. On the under side of the coupling are three vertical teeth, Q, of the same form as the teeth E, only smaller, and facing in the same direction 5 but their faces are placed a little way forward of lthe faces of the teeth E.

The cani-plate F is an anuulus which is bent to form three double-inclined planes, on which the rollers of the pawl-arms rest. The upper angles of the cam-plate are connected to an upper h ub or collar, G, by radial arms T, and the lower angles are connected to a lower col lar, Gf, by like arms T', so that the cam is properly supported ou the spindle, but its co1- lans are loose thereon, and the weight of the cam is supported on the block in which the capstan-spindle is stepped.

The upper collar, G, of the cam is shown in top view in Fig. 6, where its upper end is seen to have an annular groove, which is wide enough to allow the bottom teeth, Q, ot' the coupling to be revolved therein. The top of collar G has consequently a double rim, the

inner one of which is next to the spindle, and both are notched in radial' lines at three or more points to receive keys S, one of which is shown in place in Fig. 6, and also in detailed view in Fig. 7. The smaller ends of the keys are laid in the notches of collar G and extend across its groove, so as to intercept the teeth Q, whose square faces come against the keys and cause the cam to be coupled to the spindle. The heads of the keys at the same time intercept the outer teeth, E, of the coupling, being made high enough for that purpose, and thus make an additional coupling-connection.

The keys are locked in the notches by means ot' a notch on the rear side of that part ot' each key which lies across the groove, into which notch the square face of one or another of the teeth Q tits, and thereby prevents the key from being moved inward or out-ward.

4When the motion of the spindle is reversed the cam F is immediately disconnected by reason of the throwing ofthe keys S out ot` their seats, which is eiected by the curved backs oi' the teeth E, which come against the inner ends ot the heads of the keys and draw them out far enough to let the keys clear the teeth E and Q.

The windlass-shait has the usual central ratchet to receive a detent, (shown in red outline,) and also two workin g ratchets, KK.which are worked by pawls concealed within jaws J J, which have wrought-iron arms 1 l, whose inner ends have shoes H H, in which are pivoted anti-friction rollers that rest on the upper face of cam F.

When the cam is coupled to the spindle the forward mot-ion of the cani operates the windlass, the lifting inclines of the cam being longer than the falling inclines, the latter being made abrupt as compared with the others, so as to prevent any back motion of the windlass from turning the cam backward and uncoupling it from the spindle.

What I claim as new, and desire to secure by Letters Patent, is-

l. The cam F, loose on the capstan-spiudle, in combination with the coupling ring or collar D, whereby the cam is connected with the spindle, substantially as described.

2. The coupling-collar D, made with lateral teeth E and vertical teeth Q, substantially as described.

3. The combination of the revolving cam F with the pawlarms I, substantially as described.

4. The combination of the grooved upper collar, G, of the cam with the teeth E and Q of the coupling-collar and the keys S, substantially as described.

WILLIAM GOODMAN. Witnesses:

J As. I. HOWARD, OHAs. H. CLERKE.

Images