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Publication numberUS692396 A
Publication typeGrant
Publication dateFeb 4, 1902
Filing dateJun 3, 1901
Priority dateJun 3, 1901
Publication numberUS 692396 A, US 692396A, US-A-692396, US692396 A, US692396A
InventorsJoseph R Wilcox
Original AssigneeMatilda L Wilcox, David Farquharson, William E Swett
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 692396 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Patented Feb. 4, |902.


I'Applicaton med Jupe 3, 1901.)

2 Sheets--Sheet I.

(No Modal.)

UNrrn-n STATES PATENT `Cini-farce.



SPECIFICATION forming part of Letters Patent No. 692,396, dated February 4, 1902.

Application tiled .Tune 8,1901.

To @ZZ whom it may concern:

Be it known that I, JOSEPH R. WILcox, a citizen of the United States, residing in the city and county of San Francisco, State of California, have invented an Improvement in Wave-Motors; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to improvements in engines in which the motive power is furnished by the action of the incoming waves of the ocean.

It consists, essentially, of a framework supported and extending over the water and carrying at its outer end a pivoted paddle adapted to be oscillated by the waves, guides in which the journals of the fulcrum-shaft of said paddle are movable, whereby said paddle is adjusted in relation to the height of the tide, means by which said adjustment is made automatically, and means by which the power generated by the oscillation of the paddle is utilized or conserved.

It also comprises details of construction more fully to be hereinafter set forth, having reference to the accompanying drawings, in which- Figure 1 is a longitudinal elevation of my invention. Fig. 2 is a plan.

A represents a framework on which the various parts of my device are mounted. This framework is suitably supported, as upon the piers 2, and may be braced and' trussed as the exigencies of the case require, the desire being lto form a firm rigid structure capable of withstanding the severe strains put upon it. On the outer end of this frame arethe vertical guide-timbers 3. A sash 4 is supported and slidable in these guides, and on this sash are fastened the brackets 5, in which latter the shaft 6 is journaled. A paddle is secured to this shaft in such manner that its greater length will hang below the shaft and oscillate with the incoming waves. This paddle is an open frame made in two parts, the one, 7, inclosing and slidable in relation to the other or pivoted portion 8. The sliding portion 7 consists simply of metal sleeves connected by a heavy horizontal plank or paddle member 9. The opposite ends of the Serial No. 62,928. (No model.)

pivoted portion are suitably joined, and the whole paddle is reinforced by the trusses 10.

The utilization or conservation of power generated by the oscillation of this paddle is effected as follows: Situated at a convenient spot, generally from two hundred to three hundred feet from the outer end of the frame A, is a pump whose cylinder 1l is fixed in upright position. .The plunger 12 is a heavy metal column of lesser diameter than the interior of the cylinder. This plunger extends without the cylinder, and a packing 13 forms a suitable tight joint. Respective inlet and outlet valves 14 and 15 are provided in the cylinder, and the compression and expulsion of fluid within the cylinder are edected by the displacement occasioned by the falling plunger. A cable 16 connects the outer end of the plunger and the upper end of the paddle, so that as the ini-lowing wave pushes with its tremendous force against the paddle the latter islmoved to lift the plunger and draw in the fluid through valve 14. The return outward again of the paddle allows the plunger to fall by gravity and expel the Iiuid in the cylinder. As these machines are placed at the seashore, where the force exerted by the waves is immense, it is readily seen that the weight of the plunger is practically limited only by the size of the paddle.

An important feature of my invention is the use of the long heavy cable 16, for the sag that occurs therein when the plunger has dropped to its lowest point serves to relieve allwrenching or rendingasunder of the parts when a wave strikes the paddle, which would occur if the connections between the paddle and the pump were rigid.

In order to allow a more ready return outward ofthe lower end of the paddle and not retard the fall of the plunger unduly, I have devised a means to lift the member 9 from the water automatically during this outward movement and to return said member to position for the next inward movement. This lifting of the member is done as follows: Cables or ropes 17 are secured to the top of the sleeves 7, to which latter the member 9 is attached and by suitable guide-sheaves 18 lead to the piston-rod 1S) of the working cyl- IOO inder 20. Connecting'the cylinder 2O and the outlet pipe l5' of the l pump is a pipe 2l, through which fluid under pressure may be admitted to the working cylinder and behind the piston to drive the latter forward and lift the sleeves and member 9 of the paddle. A three-way cock 22 in the pipeis adapted to be turned to admit the fluid to or discharge it from the cylinder by means of connectingrods 23 and 24 and an oscillating rod 25, arranged iu relation to the movement ot' the plunger l2. Attached to the plunger and rod is a cord or chain 26, whereby the rod is turned on the upward movement of the plunger to open the valve 22 and admit the fluid behind the pistou of the working cylinder. As the member 9 is lifted the resistance of the water against the paddle is accordingly overcome and the plunger begins its descent. On its descent the cord pulls downward on the rod 25 and so turns the valve 22 to allow discharge of the fluid from the working cylinder, causing a return of the piston of the latter, and a falling of the member 9 again into position. The rod 25 is preferably hollow and adapted to contain a quantity of quicksilver, which assists in the rapid positive action of the valve Provision must be made for the continual variation in the height of the tide and for undue stress of weather. This is done by raising the sash 4, which carries the paddle in the guides 3. For ordinary variations in tide this raising is accomplished automatically. The adjustment of the paddle to the continual rising and falling of the tide is effected by means of a weight 3lC and a balance-iioat 35. The weight is attached to cables 36, which pass over sheaves 37 and connect to the sash at 38. This weight is ordinarily heavy enough to raise the sash and paddle clear of the water; but the float 35 serves as a balance to adjust the paddle to the height of the tide. This is done by means of a cable 39, which connects the weight and float, and this cable passes over the sheave 40. The float operates in a pit or well 41, which latter is connected with the ocean by means of a siphon 42. One end of this siphon reaches to the bottom of the pit and the other extends below the line of lowest water. Accordingly as the tide rises or falls the water in the pit Will be maintained at a corresponding level. As the float rises it allows the weight to lower, which action causes a corresponding elevation of the paddle, and as the oat lowers it raises the weight and lowers the paddle, so that the position o'f the latter is always relatively the same as to the water in which it dips. Where the paddle is to be raised clear of the water, as in case of a storm, I employ similar means as to raise the member 9--that is, I have a supplementary set of cylinders 28, which I designate as storm-cylinders. They have pistons 29, whose rods are connected by cables 30 with the cables 36 at 36. A pipe 32 admits iiuid under pressure from the pump behind the piston to move the latter and raise the paddle. A valve or cock 33 controls the flow of this iuid.

Having thus described my invention,vwhat I claim as new, and desire to secure by Letters Patent, is-

l. A wave-motor consisting of a frame or support, vert-ical guides at the outer end thereof, an oscillating. paddle slidable in said guides and connections of said paddle with a plunger-pump, said paddle including two parts one slidable in relation to the other.

2. Awave-motorcomprisingaframeorsupport, a paddle including two parts one slidable in relation to the other and one of said parts pivotally mounted, vertical guides on said support and in which said paddle is slidable, a cylinder and a plunger operating therein, and connections between the plunger and paddle.

3. In a wave-motor, the combination of a frame or support, guides thereon, a paddle adjustable in said guides, a weight and a cable connecting said weight and paddle, a weight, -a iioat and a cable connecting said weight and float, said float so operating when it is moved upward as to cause the weight to descend and raise the paddle and when said iioat is lowered to raise the weight and lower the paddle.

4f. In a wave-motor, the combination of a support, vertical guides thereon, a sash carrying an oscillating paddle slidable in said guides, a weight, and connections of said weigh-t and sash whereby the former tends continually to raise the latter and consequently to lift the paddle out of the water, a balance-float, and connections of said iioat and weight, a well in which said float is contained and a Siphon-pipe connecting said well and the water in which the paddle normally dips, whereby the water within the well and that without are constantly maintained at the same level, and as the lioat rises the weight lowers and the paddle is raised and vice versa IOO IIO

as the ioat lowers the weight rises and allows l the paddle to lower.

5. The combination in a wave-motor, of a frame or support, vertical guides thereon, an oscillating paddle pivoted upon a sash slidable in said guides, storm-cylinders in each of which a piston is movable, connections of the rods of said pistons and sash whereby the latter, with the paddle, is moved vertically when the pistons are reciprocated, and means for admitting uid under pressure to said cylinders to move the pistons.

6. The combination in a wave-motor, of a support, an oscillating paddle, said paddle having a vertically and independently slidable horizontal portion, a cylinder in which a piston is reciprocable, connections between said horizontal paddle portion and the rod of said piston, and means whereby fluid under pressure is admitted to said cylinder to move the piston, and raise said horizontal portion.

7. The combination in a wave-motor of a support, a paddle pivoted thereon, said paddle having a vertically and independently slidable horizontal portion and having its longer lower portion normally in contact with the water, and a shorter portion above its pivotal points, and said support having a vertical guide for the paddle, a cylinder, a plunger operating therein, and a cable connecting` said plunger with the said shorter portion of the paddle whereby the piston is reci procated by the oscillation of the paddle.

8. The combination in a Wave-motor of a support, a paddle pivoted thereon and adapted to be oscillated by the waves, said paddle having a vertically and independently slidable horizontal portion normally offering a resisting-surface tothe How of the water, a cylinder in which a piston is reciprocable, connections of the rod of said piston and said horizontal paddle portion, means by which fluid under pressure is automatically admitted to said cylinder to move the piston and raise the horizontal portion, and by which the Huid is discharged from said cylinder and the said portion lowered.

9. A Wave-motor consisting in combination of a support, guides thereon, an oscillating paddle slidable in said guides, an independently-slidable horizontal portion on said paddle, said horizontal portion normally offering a resisting-surface to the tlow of the Water, a pump having a Weight-plunger adapted to be raised by the alternate oscillations of said paddle, and to fall by gravity on the successive oscillations thereof, a cylinder in which a piston is reciprocable, connections of the rod of said piston with the horizontal paddle portion, a pipe connecting` said cylinder and pump, a three-Way cock in said pipe, and means by which said cock may be turned to admit fluid under pressure to the cylinder on alternate reciprocations of the pump-plunger, and to turn said cock to discharge the fluid from the cylinder on the successive recipro- -cations of said pump-piston.

In Witness whereof I have hereunto set my 45 hand.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4105368 *Nov 15, 1976Aug 8, 1978Waters Fred LFloating wave powered pump
US4490621 *Apr 14, 1983Dec 25, 1984Muroran Institute Of TechnologyMethod and apparatus for generating electric power by waves
US5708305 *Mar 29, 1996Jan 13, 1998Wolfe; Douglas E.Ocean wave energy conversion system
US6948911Apr 4, 2003Sep 27, 2005Laughton Ronald BWater torque converter
US7023104Jul 9, 2003Apr 4, 2006Alvin KobashikawaWave energy conversion device for desalination, ETC
US8049357Nov 1, 2011Saavedra John AApparatus and method for electrical power generation from low-head low-flow water sources
US20040007881 *Jul 9, 2003Jan 15, 2004Alvin KobashikawaWave energy conversion device for desalination, ETC
US20110140436 *Jun 16, 2011Saavedra John AApparatus and method for electrical power generation from low-head low-flow water sources
WO2005080791A1 *Feb 24, 2004Sep 1, 2005Y.T. Enterprises Ltd.Wave power plant
Cooperative ClassificationF03B13/182