US1251917A - Refuse-ejector for ships. - Google Patents

Description

W. S. PARSONS.

REFUSE EJECTOR FOR SHIPS.

APPLICATION FILED JULY 30,1915.

LQfiLQlK Patented Jan. 1,1918.

STATES PAT N To.

WILLIAM STEEL PARSONS, 0E GROVE PARK, ENGLAND, A SIGN E To J. STONE &

COMPANY LIMITED, 0E panacea-ENGLAND, 7 7

REFUSE-EJECTOR FOR SHIPS.

Patented Jan.1,1918.

Application filed July 30, 1915. SerialNo. 42,853. i j

To all whom it may concern:

Be it known that I, WILLIAM STEEL PAR-.

sons, a subject of the King of Great Britain, and resident of Glymedale, Baring Road, Grove Park, in the county of Kent, England, have invented new and useful Improvements in Refuse-Ejectors for Ships, of which the following'is a specification.

This invention relates to new or improved apparatus for controlling the order or sequence of mechanical operations in apparatus for discharging refuse from ships particularly the operations controlled by valvular devices employed in ships ashes expellers it being necessary to provide mechanism for insuring that the operation of one device shall not take place until the operation of another device has commenced. This may be essential in order to prevent foolish or careless persons from damaging or wrecking an apparatus by starting the wrong operation in advance of another or by starting two operations at incorrect times relatively to one another. The employment of mechanical gearing for the purpose requires great skill and precision in assembling and connecting up the parts in order that the secondary operation may be correctly timed in relation with the primary operation. If such mechanical parts are not arranged accurately or if they become Strained or loose, there is a danger of the operations not taking place in properly timed relation and damage may result. The object, therefore, of the present improve ments is to provide simplified apparatus which will not be costly to produce, which will be easy to assemble so that accurate timing of the secondary operationmay be had, and which will not be liable to get out of order, so that in all circumstancesit is certain that one particular operation must commence before the second operation is started.

This invention provides the combination with a manually or mechanically operated primary device which controls or performs one operation in the discharge apparatus and a secondary device which controls or performs another operation, of a fluid pressure transmission arrangement connected between the two devices in such manner that, upon adjusting the primary device to start the first operation, the movement of the primary device or its operating means brings about a release of fluid pressure, or sets up or transmits fluid pressure, the change of pressure'bringing about or per-' mitting the adjusting. of the secondary de-v vice, for starting the second operation.

It is apparent that the orderor sequence of operations of any number of devices may be controlled or brought about by theimproved means and'that the invention is not limited to a sequence of two operations only.

In orderto enable this invention to be readily understoodreference is made to the accompanying drawing in which Figure 1 shows in sectional side elevation means" for hydraulically controlling the opening of a flushing valve in relation to the opening-of a gate or-discharge valve.

Fig. 2 shows more or'less diagrammatically. a similar control between a gate or discharge valve and the switch or controller of an electric motor, and

Fig. 3 shows more or less diagrammati-,"

an apparatus forej ecting discharge orifice before the flushing valve 5 is opened in order to supply water for washing the ashes down to the. ejector.

The valve 0 may comprise a rotatable plug formed With apassage cl which can be brought into alinement with the ports e and f of the casing inorder to open the-valve. The valve plug mavbe'rotated in any convenient manner as for example by the shaft,

g'operating a worm and wormwheel gear not shown. 7.

-ln Fig. 1, the piston a connected with the flushing valr e b, is fitted loosely in its .cyI inder I so that pressure waterarri-ving by the supply pipe j may get to the closed space at the back of the piston a, and keep the flushing valve b down upon its seat. Thespace at theback of the piston a is connect-' e by r a th a elfrc. o ing.v .1,;

and the latter is connected by a pipe p.

With a su able exha s The. plug o h discharge valve 0 has a projection m which strikes against the stem n of the valve Land opens the latter against the action of the spring 0 at the desired moment. The pres sure is now relieved from the back of the piston 64 and the pressure beneath the said piston or opens the flushing valve 6, which ema pen s lens a the lflosing valve Z remains open. When the discharge valve 0 is closed, the projection on releases the valve Z which is immediately closed, whereupon pressure again accumulates on theback of the piston a which promptly closes the flushing valve be If desired a screw-down arrangement qmay be fitted to the flush-ing valve 6 for screwing it down on to its seat by hand when desired.

Instead of the second valve b be/ing a flush valve, it may be a steam valve, or any other valve which is only required to open when the first valve hasbeen opened fully or to a certain extent.

In the modification seen in Fig. 2, the valve 0, controls, in its opening and closing movements, the manipulation" of a motor switch or controller 1. The switch 7' may control an electric motor which drives a centrifugal pump for supplying water to the ejector. In this modification the rod of the piston a is connected with the switch arm r and the cylinder h is constantly supplied with water under pressure by the pipe 8 through a preferably constricted port t. This pressure watercannot normally escape through pipes/b, p, because the valve 1 is normally closed as in Fig. 1. Therefore the piston a is normally held in the rlght hand dotted line position and holds the switch arm 1 in an off position. When the valve c" has been opened and the valve Z lifted by the'projection on the valve 0, the pressure waterescapes fromthecylinder it through the pipesls and p and the switch arm'r may then be freely "operatedby hand or by automatic means. When the valve 0 is closed thus permitting the valve Z to close,

the pressure-inthe cylinder- It quickly rises and forces the piston a and switch arm 7 into the dotted or offposition.

, According to a further-modification illustrated in Fig. 3 the projection on strikes a rodu at the' desiredmoment, andforces a piston v; into its cylinder to, the displaced fiuidbeing forced through a pipe m into a space behind the piston 'a connected with the valve Z), the latter being therebyopened. fhere may be a tank or accumulator at y adapted to keep the-pipe w and'spaces; in the;

cylinders ifi-lled,'"'-A' back pressure valve dis fitted to-preventreturn flow, I

' .hereinbefore indicated, the improvements are applicable to mechanical devices areferredto, others r -a inappara'tus of tl kind h siva raal ha c according to a predetermined order or se quence, the. said improvements providing a fluid lock which resists or prevents operation of the secondary device until the correct moment is reached in the operationof the primary device.

I claim. 7

1. Means for controlling the sequence of operations in apparatus for hydraulic dis.- charge of refuse from ships, comprising a passage for refuse and water, a positively operated main valve for the passage, water. supply means for moving refuse toward said valve, a fluid pressure transmission device connecting said valve with the control of said water supply means and normally resisting movement of said control in advance of the movement of said valve, and means operable by said valve in completing its opening movement for controlling said fluid pressure, whereby the movement of the said control may take place in succession to that of the said valve, substantially as set forth.

2. In an apparatus for hydraulically dis-' charging refuse from ships, the combination with a discharge valve and a refuse flushing device adapted for flushing refuse into the discharge stream, of means for controlling the sequence of the coming into operation of said valve and flushing device comprising a positively operated controlling member for the discharge valve,.a controlling member for the flushing device, a pressure fluid control for the last named controlling member, and means operable by the movement of the positively operated discharge valve at the end of the opening movement thereof to actuate the pressure fluid control, whereby the movement of the controlling member for the flushing device can take place only after the opening of the discharge valve, substantially as set forth.

3. In an apparatus for hydraulically discharging refuse from ships, the combination with a discharge valve and a refuse flushing device, of means for controlling the sequence of the coming into operation of said valve and said device comprising a positively operated controlling member for the discharge valve, a controlling member for the flushing device, a pressure fluid device normally resisting the movement of the lastnamed controlling member, and means operable by the movement of the positively operated discharge valve for freeing the flushing device controlling member from the resistance of the pressure fluid, substantially as set forth.

4:. In an apparatus for hydraulically discharging refuse from ships, the combination with a discharge casing, a manually operated discharge valve, a flushing device, and

a controlling valve for the flushing device,

of means for controlling the sequence of operations of said valve and said flushing between said valves normally resisting the operation of said controlling valve, and means operated during the operation of said discharge valve and at the completion of the opening thereof to influence the fluid pressure device, whereby at the desired'moment the operation of the flushing control valve may take place, substantially as set forth.

5. Means for insuring the correct sequence of operations in an apparatus for discharging refuse from ships, comprising a manually operated discharge valve, water supply means, hydraulically operated means controlling said water supply means, fluid pressure control means, means on the discharge valve to operate the fluid pressure control means at the conclusion of the o ening of the discharge valve, and a flui pressure connectlon between the fluid pressure control means and said hydraulically operated means, substantially as set forth.

6. Means for insuring the correct sequence of operations in an apparatus for hydaulically discharging ashes and refuse from ships comprising a manually operated discharge valve, a flushing valve, a fluid'pressure piston connected with said flushing valve, and a leakage passage from one side of said piston to the other, a'striking device connected with said discharge valve, a sliding rod in the path of said striking device, fluid pressure control means connected with said rod, and a pipe connecting the last named means with the cylinder of said piston on the one hand and with an exhaust on the other hand, substantially as described.

WILLIAM STEEL PARSONS.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 1

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