US59969A - coffin - Google Patents

Description

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aN. B. corrm in., or BosToN, MASSACHUSETTS, AssIeNoR To HIMSELF AND J. D. SPAULDING, or SAME PLACE.V

Leeeee Patent Ne. 59,969, ezeteez November 27, 1866.

SPECIFIOATIO`N.

TO ALL WHOM T MAY CONCERN:

Be it known that I, DAVID N. B. CFFIN, jr.,l of Boston, and 4of Newton, in the `county of Middlesex, and State of Massachusetts, have invented certain new and useful improvements in 'Capstans and'Windlasses and do hereby declare that the followingis a full and exact description thereof, reference being had to the accom. panying drawings, making part of this specification, 'and to the letters of reference marked thereon. With reference to the drawings- A y Figure 1 is a general sectional view of my improvements.

Figure 2, a side viewof the windlass, pawls, and sockets.

Figure 3, a separate view offthe friction mechanism for controlling the'windlass-barrel and chain-wheel when letting go anchor, Sto. e

Figures l'and 5 are views of the hub of lever head, showing the sockets or grooves for fastening the cover.

Figure 6 is a separate view of the bolts and inclines, 86o., for locking andunlockingthe connection between the capstan and second capstan or windlass.

Figure 7 shows separately the system of4 bolts, and the inclines for operating them, that are -located in the capstan head. A i

Figure 8 represents the bolts located in the capstan base for locking the fulcrum: gear, &c., and the inclines which operate them.

Figure 9 shows the arrangement of gears u Figure 10 shows the arrangement of gears s t. The number of `these gears, however, may be'varied .according `to the strength required, viz: the gears s and u.

Figure 11 shows how the fulcrum gear may be held by a` self-acting lifter pawl when a capstan is,not required to operate in both directions.

Figure 12 shows the applicability of my improvement to that class of fulcrum-gear-capstans where parallel shafts and gears are used instead of angular shafts and conical gears. It also shows the extension .of the central shaft, above as well as below, for a combination there, as well.

Like letters refer to the same or corresponding parts in all the iigures.

The nature of my invention relates to improvements in the construction of that class of geared or power capstans which are made susceptible of operation, also as a simple capstan, to the combination of the same with other capstans or windlasses, and .to the construction and arrangement of the partsof the windlass with reference to such combination and use. (For examples of the capstans upon which I.. improve see my rejected application of the year 1856 and my patent of 1865.) a is the capstan base, vand is furnished with theusual pawl pockets, and also a groove, under the projecting part, into which a block or other guide may be hooked e to guide the rope when being wound from an elevation out of thev proper level, to cause vit to wind properly `on 'the vbarrel without guidance. Through the centre of the bed-plate is formed a bearing for the central shaft or spindle b to turn in'. This shaft Z7 is keyed, squared, clutchedor otherwise made fast to the bodylof the` capstan c so as to turn with it. In the body of barrel c are arranged the shafts d or eewith a gear on each end, the upper gear, s, playing into a central gear, t, connected or conncctable to the lever head, z', and the lower ones u playing into the fulcrum gear f. In' the lever head z' are arranged a series of vertically movable bolts, g, which, by a partial rotatory movement of the series of inclines 7L are lifted or dropped, thereby connecting or disconnecting the barrel c to or from. the lever head These inclines, L, are moved by the projection j connected thereto, either directly or byturning theV cover lc, into which j is notched for the purpose. The series of inclines l may be connected with inclines z to operate the bolts m in an oppositedirection, to lock and unlock the central gear to and from the'lever headin alternation with the locking and unlockingof the lever head to the barrel directly by bolts g. The bolts m and inclines'l may be omitted, and the centre gear t permanently fastened to the 1lever head i, whenever the improvedlocking and suspension device is applied to the fulcrum gear. This device I will proceed `to describe. A series of bolts o is fitted loosely in sockets in the bed-plate so as to be mopable vertically by means of a series of inclines p-movable in a. circulanpath by means of a projection, q. The tops of these boltso have double inclined faces corresponding to the double inclined faced lugs on the bottom of the fulcrum gear, so that when it is desired to drive by the fulcrum gear the projection gisppushed with the foot or hand so as to lift bolts o, and withthem the fulcrum gear, and so lock it to the bed-plat'c-by the interlocking of the bolts and lugs at thel proper elevation to be acted on by the gears u on 'shafts d or e. When only the simple power is required the boltso are dropped down againby moving q and inclines p in the opposite direction, so as to leave the fulcrum gear in a state of suspension either upon the flanges of gears u or any other suitable attachment to the capstan barrel. (See figs. 12 and 1l) I When the fulcrum Vgear is left in this suspended position it simply revolves with the capstan' body free and clear of all stationary or dilferently moving parts, and consequently causes no' friction. This device'obviates any necessity for allowing the gearing to be driven when the simple capstan only is required. When a capstan is required only to operate in one direction the 'fulcrum' gear may be elevated, locked, and dropped to its position of suspension by means of a series of pawls, as lillustrated in fig. 11. These pawls, one of which is shown,'are hung in the ordinary manner, except that a stop is furnished, so that when the gears u and fact'against the pawl, causing it to rise and lift the fulcrum gear, as indicated by d'ottedlines, to the proper elevation, this stop will prevent the further movement of the pawl; so that as long as the action of the gears continues it will hold the fulcrum gear locked at the proper height, and the end of the pawl and its socket being properly inclined, the fulcrum gear cannot rise higher. When the action of the gears ceases, the pawl, standing at an inclination, will allow the Afulcrurn gear to drop down again to its position ofsuspension, and on' the capstan being worked with simple power, the pawls drag over the pockets as in ordinary cases. The cover fastening is as followsf Cast or otherwise fastened to it is the lug o, one, two, or more. Inthe hub of the lever head are cast or otherwise formedfgrooves or sockets in corresponding relation to the lugs, (see figs. V1, 4, and 5,) so that by dropping the cover down the lugs VYpassing through the vertical partv of the grooves, and then partially rotating the cover, the lugs o catch under the horizontal part of the grooves, and hold the cover on, and by giving a slight inclination to the top of'thefgro'ove or lug, the cover will be tightly held to the head. Now I make a notch in the cover at such point that when theiprojection j is at its centre of movement, the notch being placed thereon, the lugs n will be directed into the vertical part of the grooves in the hub; then a stop is formed on the head on either side of 1the projectiony', so' that if the'lcov'er be turned one way till the projection rstrikes the stop the bolts g are let into action, vand'the head is locked for simple power. When turned in the opposite direction to the stops the bolts g are lifted, and the gear t comes'intoaction, so-as' to bring the multiplied power' into use either by the dropping into action of the bolts/m or by the permanent connection kof gear 't to 'the lever head,

and at either extreme ofthe movement of the cover it is fastened by the lugs 'v and grooves asiexplained, While at the intermediate position it may be lifted olf. When it is desired to apply this capstan to the operating of a windlass the shaft 11 is extended below (or above, as the case may req`uire,) Ato a bearing, w, of the windlass. :u is the windlass shaft Sustained also in bearing y, and is provided with a bevel gear wheel z fast to the shaft and playing into gear A on shaft 6. This gear A isloose, but may be locked to the shaft, at pleasure, by means of bolts B, which drop into notches or pockets upon the gear. Theselbolts are carried in a part securely fastened to shaft b, as shown in figs. 1 and 6, and are lifted and droppedv into action by means of the iiiclines D, which are movable in a circular path by means of the projection E. j Gear Z `has secured toit a pawl-wheel or ratchet F, and a series of pawls G are arranged to playin'to it in the usual manner. I, however, construct these pawls with ia.' partly circular head, and cast correspondingly shaped sockets, into which Iiinsert them loosely. A simple guard, H, keeps them in. Allitting of pins and screwing or otherwise fastening them in is saved; great i strength securedi'with great facility of removal. I is the windlassbarrel, which turns freely on shaft x, but may be locked and unlocked from the pawl-whcel and gear Z at pleasure by'means of key or block K, which ts into recesses in and F. On'barrel I is formed a friction-wheel L, which bears the friction strap M. (See fig. 1 and iig. One endrof this strap is made fastA to some' stationary object, while the other end is jointed by a chain or other suitable connection to the windlass shaft N, which extends upward and downward to all desirable points for working' it, land has lever sockets at all such points, so that by turning this shaft strain is applied to the friction strap, whereby may be'controlled the movements both of barrel I and anchor-chainwheel P; the chain-wheel P being loose on the shaft, but connectable, at pleasure, for joint operation with barrel I by means of .a key or block Q tted removably to recesses in both P and L. On the opposite side of shaft b the windlass shaft may be extended, and all the parts duplicated'in symmetrical order from the ratchetwheel like Ffto the chain-wheel like P, as is often required. When a second upright windlass or Acapstan is required it is only necessary to ita barrel to the extension of shaft b, and furnish it with notches or lugs for bolts B to take, or it may be keyed directly to the shaft. It will 'be observed that this capstan and windlass may be operated equally Well in either direction. When the windlass is operated in one direction, the upper capstan pawls will vbe depended on as when running chain vout of thellocker. An additional set of windlass pawls may, however, be arranged-opposite to those shown,1 or over the pawl-wheel, if required for heavy work in that direction. In the part' carrying bolts- B, -I show pockets for levers to be used in case it is required to rotate the windlass below.v (Seeig. 6.)

Thus having described my improvements, what I claim asmy invention, and desire to' secure by Letters Patent, is as follows:

1. The employment of the` shaft b extended from thecapstan in combination with the shafts d or c with suitable gears, as u f s and t, substantially as described.

2. Locking the fulcrum gear of a capstan to the bed-plate by means of bolts movable upward from beneath into contact therewith, substantially as ,describedl 3. I also claim the employment of a series of inclines movable in a circle, and so applied in combination with the fulcrum` gear of a capstan as tolift said gear from its position of inaction to the proper' position tothe acted on by gears playing into it, substantially as described.

,4. I also claim fastening the cover of a capstan by means of lugs/v in combination with sockets or grooves inthe hub, substantially as described; i u l V i l 5. I also claim thefarrangement of the cover fastenings in relation to the locking mechanism of' the capstan, so that when the cover Ais rotated to a stop in one direction the'bolts'will be adjusted for'tlie sinple'pow'er, and the cover fastened, and when rotated in the 4opposite direction to la stop, the cover will also befastened and the bolts adjusted for the multiplied power, while in .an intermedia-te position the cover is ufa'stcned, and may be removed, substantially as described. I 6. I also claim suspending the fulcrum gear to therotating body-of the capstan. Y. Y 7. I also claim the` arrangement of the gears A' Z, paWl-'wheel F, barrel I, friction L,and chain-Wheel I), and the points of disconnecting, whereby both barrel Iland, chain-wheel P are brought under control of the friction mechanism, and yet used separately for winding, 4heaving in, Snc., substantially as described. y

8.v I claim the windlass shaft N, in combination with the friction band and barrel of a. Wndlass, substantially as described. y l b 9. I claim the partly circular heads and sockets, in combination with the pawls of a windlass, substantially as described.

10. I claim, finally, a groove, formed under the projecting part of a capstansbas'e, substantially as and for the purpose set forth. y

D. A N. B. GOFFIN, JB..

Witnesses:

H. H. FITCH, LoRnNzo G. Mom/ron`

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