1804] Specification of Mr. Brown's Patent. 163

holes a a. The lesser four wheels are, as D, and their pins move round in the holes b bb b. These plates are) firmly held into the deck by six bolts, as E, which pass through the holes ec c c€ ec e. Ontheplate A AA A, is cast four pieces, as d ddd, which project up a little more than the thickness of the wheels, and on the plate BB BB must be cast four Ppieces'of metal, as e e ee, to fitinto the holes f f ff, to keep the plates at equal distances, and true with each other. There must be little vertical wheels, or balls, moving in a groove under the large horizoytal wheel to facilitate their motion. These plates, made of cast iron, must be about two inches thick, but if of wrought iron, one and a quarter thick. This improvement will answer equally well for cap- Stans used on Shore.

Figure 4, for Small capstans which Ship on a spindle. A A represents a plate of metal, of which there must be-two exactly to correspond with each other. Between the two plates are placed Six wheels, as B, whose pins move round in the boles a a aaaa. The plates must be let into the foot of the capstan, and firmly held in by three bolts, as D, passing through the holes in the plates b b b, and screw- ing up Into three nuts, which must be let into the body of the capstanl between the welps. On the bolts, between the Plates, must be placed three stops, as C, to keep the plate Separate, from the wheels to move round freely. This will answer equally well for capstans used on Shore. This Same 3pparatus may be made use of tor the foot of a large barrel Capstan, as Figure 3, by being let into the deck for the foot of ihe capstan to siep in, only in this case the lower plate must have no hole through it.

Figure 5, for the hawse hole. A is a metal roller with a fixed pin. BBB is a metal plate, of which there must be two at each end ot the roller, to exactly correspond with each other: between these two plates are to be placed three wheels,. one larger, as C, and two smaller, as D: the pin of the wheel C, moves round in the holes bb. EEEB repre- Sents the roller A, with the two plates at each end. FP isa flat piece of metal, on which the plates rest: there must be avother fat piece of metal the length of E, to stand up two-thirds the height of the plate, to keep the work in the hawse hole. G is a Metal roller, with a fixed pin. H H are two metal. plates, between which are to be placed three wheels, one larger, as 1, whose pin moves round in the holes c, and two Smaller, as K, whose pin moves round in the holes a a, and the pin of the roller acts on these wheels. There must be two of 1he plates, Sc. at each end of the rollers, but the bottom plate, at the lower end, must be without the hole through the ceyntre of it, that the pin may