US93337A - Improvement in propelling-apparatus - Google Patents

Description

Zittend Siena Josera PARADIS, or BnooKLYN, ANEW YORK.

Letters Patent No.v93,337, dated vAugust 3,1869.

dl-w'- i IMPROVEMENT IN PROPELLING--APPARATUS The Schedule referred to in these Letters Patent and making part of the same.

'to give the vessel headway, or one or more may be located towards the front for backing. Y

I will proceed to describe one "of thein, reference being had to the annexed drawing, wherein- .1

Figure lis a vertical longitudinal section of the propeller, as ready for ordinary use.

Figure 2 is a section, with the nozzlefor backing turned down.

Similar marks of reference denote the same parts. a represents a portion of a vessel. b is a cylinder, opening at the rear and through the c is a piston, upon a rod, cl, that passes through the .head e, a stufiing-box being provided at this point.

The piston-rod d is prolonged into the steam-cylinder f, and fitted with a piston, g,'and from the crosshead h a pitman, i, connects with a crank, k, shaft l, and fly-wheel, to regulate the movement.

The` valve of the steam-engine is constructed and operated so that steam is supplied only on the forward end of the piston, to force that back, and alsothe piston e, and eject the water from the cylinder b, so that the same, acting upon the exterior water, shall canse a movement of the vessel in the reverse direction.

The steam is to be allowed to escape or led to a condenser, so that there will be nothing to hinder the free return of the steam aud water-pistons by the agency of the fiy-wheel, aided by the force of the water pressing, by its hydrostatic column upon the piston c, and refilling the cylinder b.

In lconsequence of' the pressure of water andthe momentum, the pistons might come back too rapidly and strain the crank-pin. I therefore make an air-chamber or cushion by the cylinder @between the piston c and head e, and I provide an air-vessel or reservoir, m, into which the air is forced by the backward movement of the piston, and to this air-vessel a safety-valve, n, is fitted, to retain the pressure of air which may be necessary to counterbalance the pressure ofthe `water upon't-he pistou'at the extreme backward movement, and hence to aid in starting the piston, when it is again moved to eject the water from the cylinder.

A valve, 0, opening inwards, is to be used -to admit air freely into the cylinder b, behind the piston @,as the same is moved to eject the water.

The vessel may be given stern-way or backed by 4the use of a return nozzle, s, that is made as a half circle, and fitted upon an axis at t, so that a lever, c, can be used for swinging the nozzle around,'so as to coincide with the rear end of the cylinder I), in order that the water may be projected towards the front of the vessel. p

rIhe saine effect may be produced by a standing pipe with a valve, to be turned up, and close the rear discharge-pipe or nozzle, and -simultaneously open the forward discharge-nozzle. The discharge-nozzle s may be swung around by gearing, in place of the level o.

I do not claim an air-cushion, nor the use of such a device in a separate cylinder, in connection with a propeller,

What Ielaim, and desire to secure by Letters Patent, is-`- 1. The air-vessel m, safety-valve a, and inlet-valve o, applied to the inner end ofthe propeller-cylinder b, and combined with the piston c, in the manner and lfor the purposes set forth.

2. In eon-ibination with the said air-vessel, valves, piston,and propeller-cylinder b, the steam-cylinder f, and steam-valve, arranged in the manner specified, so as only to admit steam to act in the saine direction as the air of the aircushion,'i`or projecting the water from the cylinder 11, as set forth.

3. The return nozzle s, fitted aspspecified, so as to be swung' to coincide with the end of the cylinder b,`as and for the purposes set forth.

In witness whereof, I have hereunto set myfs'ignature, this 11th day of February, A. D. 1869.

JOSEPH PARADIS.

Witnesses:

' Criss. H; SMITH,

Guo. T. PiNcKNnY.

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