US68083A - kipley - Google Patents

Description

@tetten tat-rs datent @fitta lf. A. JAMESON ANDCYRUS W. .RlPLEC OF KINGSTON, MASSACHUSETTS.

` A Laia-Spaarne. iss-,osa @ma Auguste?, 1867.

llgr rlgihnle munt it it that init-rs ntrnt mit makin-g put tf its tuuu.

T0 ALL WHOM IT MAY CONCEl'tlT:

Be it known that we, F. A. JAMESON and Cruus W. RIPLEY, both of Kingston, in the county 4of' Plymouth, and State of Massachusetts, have invented a new and useful Lever Improvement for Ships and other Windlasses, of which the following isa full, clear, and exact description, reference being had to the accompanying drawings which form part of this specification, and in which-' Figure 1 represents a front elevation of a ships windlass constructed according to our improvement.

Figure 2, a plan ofthe same. I l

Figure ,3, an end vieu of the rocking-beam, with certain appendages for altering the power or speed of the windlass-barrel, and Y I i Figures 4 and 5 side and end Views of a modification of the slide or traveller used in transmitting the motion tothe pawl-boxes. 4 i

Similar letters indicate corresponding parts. 4

Our lever improvement, applicable to ships wndlasses, of thekind which use the leveror lever purchase, has for its main object aready and wide variation in the power and speed of the barrel to adapt it with facility to light or heavy and variable strains or lifts without resorting to objectionablylong brakes or altering their length, and the nature of our invention, in such connection, consists in a novel combination with the rockingbeam of sliding-saddles niadetorest on the upper curved surface of the rocking-beam for variation of the leverage to the paul-boites. `Said invention also consists in a combination, with the adjustable sliding-saddles, of' upper and lowerrods and sliding-connections running in groovcd ways, and which, through the lower rods, transmit motion to the pawl-boxes, whereby a straighter or more direct lift is obtained for the'latter under varied adjustments of the saddles. Y l

-i Referring to the accompanying drawing, Arepresents the barrel of a ships Windlass; B, its sides or uprights on windlass-bits; C is the central upright orpaWl-bit, known also as the Samson-post, carrying the rocking-beam D, pivoted as at a, and which should be constructed to receive in gear with its endthe usual or any suitable brake-levers; alsoparrying the locking or bit-pawls lfv that drop into ratchet-teeth arrangedr around the centre of the barrel. S are the operating paul-boxes biting o'n'ratchet formations or teeth, c, for giving motion to the barrel, as inprevious arrangements. The rockng-beamD has fitted on its two arms, in an adjustable or sliding manner along them, saddles F, which adjustment, accordingly as the latter are moved in or ont, increases or diminishes, without altering the length of the brakes, the speed or power of the windlass to suit -diiferent strains or lifts, said saddles being4 connected by links e and upper and lower rodsfJand g through slides or travellers H working in grooved ways in the post C, with the pawl-bozres S. This divided rod attachment or connection and use of slides. and travellers H serve, under all Ain or out adjustments of the saddles, to secure a direct or straight lift on the paivl-boxes- It is designed that the saddles F should be moved only when the beam is squarc, that is, when its tivo ends stand at an equal height, in which position the upper surface of said beam forms arcs of circles to which the upper rodsf are radii, and the lower points of attachment of the latter are centres from which lsnid arcs are struck. The adjustment of the saddles Fin or out along the beam D, which should be simultaneous, and in opposite directions, to uniformly vary the lifting leverage of the beam on opposite sides of ils axis,it is proposed to effect by means of aright and left-handed threaded screw, G, made to work boxes which are connected, preferably, in a jointed manner, to the saddles, and made to form part of them. This screw, arranged to lie longitudinally over the beam, is freely supported at its ends in uprights t', sofas to freely rise and fall in conformity with the eurvatureof the beam. On one, and what may be termed the fulcrum end of the screw, its Yother end playing in a vertical slot, is a double ratchet or toothed wheel, 7c, which has gearing-with it, so as to operate it and the screw in reverse directions as required, a double pawl, Z, pivoted to a crank, m, hung. loose on the end of the screw, said pawl being provided with a tail, n, that, accordingly as it is made to lie against or over the one side or other ofthe crank, serves to throwl either one end of the double pawl into loch and gear with the wheel, and thereby, on turning the crank in `a direction as against the tailto give motion to the screw in one directionfand so to operate the saddlesin o r out; a changed position of the tail n, so as to lie on the opposite sidcof the crank, putting the opposite end of the double pawl in gear, when a reverse movement of the crank will give an opposite motion to the 'screw and saddle operated by.

fg, substantiallyas herein set forth.

it. This mode of gearing or operating the screw avoids the necessity of unshipping the brakes to give the screw a full rotation or series ef turns. Thus, suppose the saddles F to be 'near the centre ofthe beam-arms on which they slide,in which position a small movement gives the required change of power, and when the beam (say) lies square or horizontal the crank may be turned a half circle or more, after which, and while the beam is being Workedby the brakes, the crank, which is prevented from passing the brake, may be run back to get another hold o1' bite on the wheel, so that when the beam is again-square the screw may he worked by the crank another half circle or more in the same direction. In this way the saddles are moved in either direction without stopping the brakes. The starboard pawl-box may be provided with the usu'al pawl-tripper to lift the purchasepawls. The slides or travellers H, which may be of V or plain form, not merely 'serve to establish :1J-straight lift7 but meet the requirements oi' the pawl-borres,` which must rise in the same plane, while the upper rods f swing freely along or under the beam-arms in different planes. Where the pawl-hoxes are far apar-t, then, instead of the y or other plain side or traveller H, slides or travellers, such as represented by H, in figs. 4 and 5, may substitutedptlie same being provided with anti-friction rollers that run in or'against the central post, and being constructed'so as to admit of the lower ends ofthe upper rods f being attached thereto inside instead of over the pawl-boxes, thereby reducing and rendering less objectionable the angle' formed by the rods when the saddles are near the fulcrum or centre of motion ofthe beam. For small vessels, where the beam is too low to allow of the use of travellers, the rods may be run from the beamdirect to the pawl-boxes, to the ends of which should be attached rollers running on guides curvedto conform to the motion of the ends of the pawl-boxes.

What is here claimed, and desired to be secured by Letters Patent is- 1f The combination of lthe curved beam D, adjustable or slidingsaddles`F, ,and screw G, having right and left-handed threads, all for operation together substantially as and for the purpose specied..

2. The combination, with the beam D, sliding-saddles F, and screw G, of the wheel c, crank ni, and double pawl Z, with its reversible tail n, or the equivalents of these devices for operation of the saddles without unshpping the brakes, essentially as specified'. i v

' 3. In combination with the beam D and sliding-saddles F, the traveller H or'H, and upper and lower rods F. A. JAMESON/f CYRUS W. RIPLEY.

Witnesses: Y

WILLIAM SYMMns, FRANK J. SYMMEs

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