US261530A

US261530A - Capstan

Info

Publication number: US261530A
Authority: US
Publication date: 1882-07-25
Anticipated expiration: 1899-07-25

Description

(No Model.) v 4 Sheets-#Sheet 2.

D. N. B. COFPIN.'

GAPSTAN. I No. 261,530. j A Patented Jju1y25, 1882.

(No Model.) 4 sheets-sheet '3. 4

I). N. BQCOFFIN.

y y GAPSTAN. Y, No. 261,530. .Patente July 25, 1882.

U NITED STATES PATENT OFFICE.

DAV-1D N. BL corn-IN, or NEWTON, MASSACHUSETTS.

C APSTAN.

SPECIFICATION `forming 'part of Letters Patent INo. 261,530, dated 4July 25, 1882.

. Appnation aleaMamh 10,1882. (No modi-.1.)

To all 'whom fit may concern I Be it known that I, DAVID N. eComm, of;

the'cityfot' Newton, county ot' Middlesex, and State of Massachusetts, have invented certain new and useful Improvements in Gapstans, ot' which the following'is afull and exact description, reference being had tothe accompanying drawings, and to the letters of reference marked thereon, of which drawings-- Figure lis a sectional elevation; plan of parts; Fig. 3, an under view, in part, ofthe barrel, 85e.; FigA, anunder view of the lever-head in part,&c.; Fig. 5, a plan of top of barrel in part. 1Fig. 6 comprises ari-elevation and a sectional elevationot one pawl. Fig. '7 is a sectional view ot" barrel at line Fig. 1. jFig. Sis an elevation of a pawl-wrist or journal;

Fig. 9, 'a partial elevation of lower part of they Fig. l0 is a partial plan of parts.-

deck-plate. Fig. 1l embracestwo sectionaland partial elevations. Fig. 12 is anelevation. Fig. 13 is a plan. Fig. 14 is a perspective View of the deckplate and two-part spindle b, showing also the intermediate gears, g, projecting through openings in the deck-plate, &c. Fig. 15 is a sectional plan, the plane ot' section cutting horizontally through-the center gear, intermediate Y gear, and annular gear, and the deck-platefat the I'height of the openings through whichthe intermediate gears protrude. Fig. 16 is a perspectiveview, illustrating the ratchets n in, Svc. f

Fig. 17 further illustrates the same, with parts lon-inverted, as described. Fig-18 illustrates the ratchet at the'top of the barrel. Fig. 19 further illustrates the lever head and barholes in a sectional vie-w,lo0kin g outward from within.

Likeletters refer to the same or corresponding parts in all the tgures. Y

The invention consists in the novel construc- `spreads outward and extends downward in a circular form,inclosing a somewhat dome-shaped space beneath, and terminates in aflange at the bottom,-providedwith boltholesfor boltin g it to the deck. Through this .part of the deckplate, which,for wantot' a more accurate term, I willcall dome-shaped,77 is made an opening or openings,througl1 which protrude-the interbetween them Spaces for'drainagemhich let the water run oft'freely from the pawl-pockets without the vnecessity otmaking drainage holes, which are constantlygetting lilled up. rIhe center or first moving gear, h, has an'upward extension or shaftt`, and which extends up.

through the part b ot' the spindleand constitutes thespindles upper part, whereby the lever-head a is held down, the lower part of the-spindle b being tixed to the deck-plate, the shaft being free .to turn in part b. This upper part ot the shaft t' has a pin, u, in its upper end, andthe attached gear h at the lower end acts as a head or'flange, so that by it the leverhead, barrel, and deckplate,with part b, are securely held together, and-by taking out pin u all can be taken aparty Ashaft driven 'by power may be connected to the gear at the bottom,as indicated, by a key, t, in Fig.`1. .The -shaft is connected to the lever-head, so as to be driven by it or detached fromit at pleasure, by means ot' the drop or lock bolt or bolts j, or by any other means, positive, as illustrated in Fig. 1, or automatic, a-s illustratedin Fig. 11, which shows one of a class of automatic connections which may be employed.

.The barrel d is furnished with welts c, which terminate at the lower end against a zone ofV -the barrel of equal height with themselves from the depressed surface between the welts IOG The spaces between the teeth are called pawlpockets or lock-bolt pockets.7

The barrel d is tted to turn on the spindle b freely, and either or both are furnished with ordinary bearings, or, what is better, as it is peculiarly adapted to the conditions foundin acapstan on salt-water, dierentfrom any other` machinery-viz., with chilled bearings or chillhardened bearings applied to either or both barrel and spindle. No other bearings seem so fully to meet the conditions of slow moving, heavy pressure, and the rust and corrosion incident to capstans and windlasses in salt-water service.

The barrel d is also provided with wrists or journals w, which have a small lug at the outer end. These wrists carry pawls playing in the pawl-pockets on the deck-plate. The pawls have a through open eye or socket which fits loosely the wrists lw. In the part of the eye toward the opposite end of the pawl is the through open recess, shown of suitable size to allow the lug on the end of the wrist to pass. When the pawl is turned from the position in which it slips onto the wrist the lug keeps it from slipping oit'.

Fig. 6 shows the pawl provided with a recess on the inside, in which is jointed something like a pocket-knife blade, a blade or linger, or tongue,which,on being opened, as seen in dotted lines, Fig. 6, the pawl being raised,will rest on any projecting part of the barrel, or rest provided for it, and hold the paw] up out of action until it is required. Then, closing the tongue, it again operates.

Fig. 11 illustrates a variety of automatic methods of detachably connecting the leverhead to the center gear shaft. There is a part, l, surrounding the shaft t', and provided with ratchet-teeth n. These teeth are prevented .from rotating on shaft by lugs playing in the side grooves in shaft t'. This part l, having the ratchet-teeth, may be put on shaftt' either end up. It' the teeth are up, then a loose sliding bolt, m, in a suitable socket in the lever-head, and beveled at its lower end, will catch the teeth and turn the shaft t' when the lever-head is turned one way, and slide over and not catch when it is turned the other way; or both boltm and part Zmay be turned bottom up, bringing the bolt to the bottom. Then when the lever-head is turned one way part l will slide over the bolt m, slipping up on the shaft 'L' and down; but on reversing the motion of the leverhead the teeth 'n will catch on bolt m and so rotate the shaft c'. For

the bolt m, may be substituted, in the latter case, teeth in the lever-head, corresponding to those on part l, but in reverse order, correspondin g to bolt m, if preferred.

When the automatic device above described is used a bolt like m is substituted for bolt j in a suitable socket at 7c and the boltj omitted or dispensed with; and the teeth a on the barrel are made like teethn on part l-viz., with abevelcd backthough the latter change is not essential, it only being essential to have the bolt face so as to catch in the opposite movement from that when shaftt' is driven by ratchet-teeth n.

The lever-head is peculiar in several particulars-' viz., the bar-holes, except through the outer rim, and the spaces between the barholes also, are wholly open from beneath-t'. e., between the hub and the outer rim. ,Depending flanges or ribs constitute both the sides and top of the bar-holes. (See Fig. 19.) The rib or flange S forms the top rest or guide for the bar, which, resting in the holein the outer rim, needs no other bottom support. This construction facilitates the casting by allowing the lever-head pattern to formits own core for these parts. It also obviates the great difficulty always found in keeping drainageholes for thebar-holes and lever-head open. With this construction none are required.

The center gear, l1., drives the gear or gears g, which play into and drive the annular gear f, which drives the barrel. This order of op eration occurs when the power purchase' is used. When the fast purchase is used and the barrel is driven directly by being connected to the lever-head by its ratchet-teeth or lugs n, then the annular gear f drives the gears g, which drive the gear h, which is then detached from the lever-head either by the removal of bolts jfrom shaft li or by the automatic action of ratchet-teeth ln, &c., as describe. For power the lever-head is tur'ned in one direction. For simple or fast purchase it is turned in the opposite direction. Forchange of power what is required is the use of the automatic ratchets shown in Fig.11. It' the bolts j are used, they have to be changed from 7c to shaft t' for power, and vice versa for speed.

The materials used in construction, except so far as referred to already, may be those ordinarily used, generally cast and wrought iron, and steel, brass, 85e., if desired.

The openings in the deckplate through which the gearsgprotrude should bere-enforced or strengthened at their sides, as indicated at q, the additional metal being so disposed as to best suit convenience in casting and obviate danger from cracks by unequal contraction in cooling.

Steel journals are preferred for gears g when case or chill hardened ones are not used.

Oil poured in around the spindle at the top finds its way through the oil-passages shown in the drawings to all the bearings.

I claim--A 1. The deck-plate of a capstan as constructed-viz ,with lateral openings, connecting the inclosed space beneath the deck-plate with the exterior, for the purpose of admitting the intermeshin g of an intermediate gear with the center gear within and an annular gear without, substantially as described.

2. The spindle of a capstan as constructedviz., the lower part hollow and attached to the deck-plate and the upper part a shaft-attached IOO IOS

to acenter gea'r located beneath the [fixed part of the spindle, substantially as described.

3. The center gear, with its upward prolongation or shaft and pin, in combination with the deck-plate, a two-part spindle, barrel, and 1ever-head, substantially as described.

4. The combination of a center gear within the cavity beneath the deck-plate with an intermediate gear protruding through the deckplate and an annular gear exterior to the deckplate.

5. An intermediate gear located in an opening through the deck-plate and partly within the inclosed space beneath the deck-plate and partly outside the deck-plate, substantially as described.

6. An intermediate `gear, in combination with a center gear within the inclosed cavity beneath the deck-plate and an annular gear exterior to the deck-plate, substantially as described.

7. An intermediate gear so located andjournaled to the deck-plate as to intermesh with a center gear-within the inclosed space beneath the fixed part of the spindle, and an annular gear, substantially as described.

8. A deck-plate as constructed-viz., a deckplate or base spreading outward and down- Ward from its connection to the spindle and in a circle passing between the intermediate gearjournals and the annular gear, whereby a large circumferential or annular section is obtained through which to make the openings for gears g, substantially as shown.

9. 'lhe combination of the center, intermediate, and annular' gears as constructed--viz., the center and annular gears having their teeth supported by ijange at the top, and the intermediate gear at the bottom, substantially as described.

10. Thedeck-plate asconstructed-viz., with the described openings having re-enforcement at their sides ot' thick metal, substantially as shown. v

1l. The deck-plate as constructed-viz., with openings through which protrude intermediate gears.

12. A capstan-lever head as constructedviz.,vwith bar-holes or lever-sockets conforming to the ordinary shape of the bar-section in the outer rim, but entirely open from beneath inside ot' that rim, or substantially so.

13. The lever-head as constructed-viz., with a depending rib or bearer to bear upon and form a rest or vertical stop against the upper side of the bar in the bar-socket or lever-socket.

14. The capstan as constructed-viz., with a center gear in the cavity beneath the deckplate detachably connected to the lever-head by means otA an upward extension or shaft inside the Iixed portion of the spindle, substantially as described.

15. The pawl-pockets on the deck-plate as constructed-viz., with outwardly-open drainage-spaces. 16. Thedeck-plateasconstructed-viz.,with pawl-lugs re-enforced by detached or separate tiange to each, substantially as described.

17. The described construction of the upper end of the capstan-barrel 1 -viz., with an ann ularor continuous series of ratchet-teeth abutting toward the axis ot' the barrel against a continuous or annular ange, substantially as described.

18. In combination with the barrel and deckplate of a capstan, the pawl as constructedviz., with a through circular opening provided with a through-recess, like a keyway, in combination with a wrist or journal fixed'to the barrel and having a spur or lug at its outer end, substantially as described.

19. In combination with the barrel and deckplate of a capstan, the capstau-pawl as constructed-viz., with a recess on thevinside toward the capstan-barrel, in which is jointed or hinged a tongue, substantially as described.

20. The capstan as constructed-viz., with adeck-plate inclosin g a center gear in the space l beneath it, and an upward extension or shaft of the center gear through the hollow spindle, said shaft connected by a ratchet mechanism to the lever-head, and said center gear connected by intermediate gears and an annular gear to the lower part of the capstan-barrel, substantially as described.

21. The capstan as constructed-Viz., with the lever-head connected to the top of the barrel by ratchet mechanism, in combination with the annular barrelgear, intermediate gears, the center gear'inclosed beneath the deck-plate, its upward extension or shaft, and its ratchet mechanism, and hollow spindle, substantially as described.

22. The ratchets m n, in combination'with the center gear located beneath the deck-plate, its ,shaft i, hollow spindle b, and the leverhead, substantially as described.

23. The barrel of a capstan as constructedviz., with the ieeting ribs or welts c to abut at their lower ends against a raised zone of the barrel, the middle of the welts being tlush or ot' equal elevation from the general surface of the contiguous part of the barrel with the raised zone, substantially as shown.

DAVID N. B. GOFFIN. l

Witnesses:

JOHN H. STEVENS, W. J. MILLER.

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