2082
THE NEW ZEALAND GAZETTE.
[No. 74

Claims.—(1.) In a filtering-system, the combination with a tank for containing the material to be filtered and a cleansing-fluid tank, of a filter, means for introducing and removing the same into and from each of said tanks alternately, means for drawing the contents of said tanks through the filter, and means for cleansing the filter. (2.) In a filtering-system, the combination with a suitable tank, of a filter proper, means for introducing and removing the same to and from said tank, means for drawing the material contained in said tank through the filter while within the tank, means for introducing said filter proper into a cleaning-medium after removal from said tank, and means for passing a current of air through said filter in a reverse direction to the movement of the material being filtered. (3.) In a filtering-system, the combination with a suitable tank for containing the material to be filtered, of a filter comprising a plurality of plates, filtering-means carried thereby, and a tube communicating with the interior of said filtering-means, means for introducing and removing said filter proper into and from said tank, means for drawing the material contained in said tank through said filtering-medium and through said tube, and means for passing a cleansing-current through said tube in a reverse direction to the movement of the material being filtered. (4.) In a filtering-system, the combination with a tank for containing the material to be filtered and a cleansing-fluid tank, of a filter, means for introducing and removing the same into and from said tanks alternately, means for drawing the contents of said tanks through said filter, and means for removing foreign substances from the surface of said filter after its removal from the tank containing the cleansing-fluid. (5.) In a filtering-system, the combination with a suitable tank for containing the material to be filtered, of a filter proper, comprising a suitable filtering-medium, and a tube communicating with the interior thereof, a pump connected with said tube for drawing material from said tank through said filtering-medium and through said tube, and a pump communicating with said tube for passing a current of air through the same into and through said medium in an opposite direction to the movement of the filtered material. (6.) A filter comprising a filtering-medium, a tube communicating therewith, a pump for producing a drawing action within said tube, and a pump for producing a reverse or blowing action of air therein. (7.) In a filtering-system, the combination with a tank for containing the material to be filtered and a tank for containing a cleansing-liquid, of a filter, means for introducing and removing the same into and from the first-mentioned tank and for introducing and removing the same into and from the second-mentioned tank, means for drawing the material contained in the first-mentioned tank through the filtering-medium while the filter is within the tank and for drawing the liquid from the second-mentioned tank through the filter while therein, and means for passing a cleansing-current through said filter in an opposite direction to the movement of the filtered material. (8.) In a filtering-system, the combination with a tank for containing the material to be filtered and a water-tank, of a filter, means for introducing and removing the same into and from each of the said tanks alternately, means for drawing the contents of said tanks through the filtering-medium, and means for passing a current of air through the said filtering medium in an opposite direction to the movement of the material being filtered. (9.) In a filtering system, the combination with a tank containing the material to be filtered, of a filtering-medium, means for alternately introducing said medium into and removing the same from said tank, means for drawing the contained material through said filtering-medium while in the tank, and means for passing the cleansing-current in a reverse direction to the movement of the filtered material while said medium is outside the tank. (10.) A filter comprising a filtering-medium, and means for accomplishing in a continuous operation an alternate drawing and blowing action upon said medium. (11.) In a filter, the combination with a filtering-medium, of a tube extending into said medium, and pumps connected therewith, for producing in a continuous operation an alternate drawing and blowing action. (12.) In a filtering-system, the combination with a suitable filtering-medium, of a tube communicating with the interior thereof, and pumps for producing an alternate drawing and blowing action within said tube while permitting the tube to remain in a given fixed position relative to the medium. (13.) In a filter, the combination with a suitable receptacle for the material to be filtered, of a filter proper, means for introducing the same into and removing the same from said receptacle, means for producing a drawing action through the said filter while in the receptacle, means for passing a cleansing-current through the same outside the receptacle, and mechanism for controlling the said drawing-means and cleansing-current-actuating means relative to the position of the filter. (14.) In a mechanism of the class described, the combination with a filter proper, of means for producing a drawing action, means for producing a blowing action therein, means for introducing and removing said filter into and from the material to be filtered, and mechanism for controlling the said drawing and blowing action relative to the position of said filter. (15.) In a mechanism of the class described, the combination with a filter proper, of means for introducing the same into the material to be filtered and removing the same therefrom, means for producing a drawing action, means for passing a cleansing-current in a reverse direction to said action, and mechanism for controlling said drawing and cleansing means relative to the position of the filter proper. (16.) In a mechanism of the class described, the combination with a filter proper, of means for introducing the same into the material to be filtered and removing the same therefrom, a hydraulic pump, an air-pump, common communicating-means between said pumps and said filter, and means for controlling the action of said pumps upon the filter relative to the position of the filter. (17.) A filtering process comprising, in a continuous operation, an alternate drawing and cleansing action and a blowing action through a filtering-medium. (18.) A filtering process comprising passing a fluid through a filtering-medium, passing a cleansing-fluid through the filtering-medium, and passing a cleansing-current in a reverse direction through said medium. (19.) A filtering process comprising submerging a filtering-medium within a liquid, drawing the liquid through the medium, removing the medium while continuing the drawing action, passing a cleansing-fluid through the medium, and then passing a cleansing-current through said medium. (20.) A filtering process comprising passing a liquid through a filtering-medium, passing a cleansing-liquid through said filtering-medium, and then passing a cleansing-fluid therethrough. (21.) A filtering process comprising introducing a filtering-means into material to be filtered, drawing said material through the filtering-means, removing the filtering-means from said material, introducing the filtering-means into a water bath while continuing the drawing operation, and passing a cleansing-current through said filtering-means in an opposite direction to the movement of the material being filtered. (22.) A filtering process comprising introducing filtering-means into material to be filtered, drawing said material through said means, removing the filtering-means and introducing the same to a water bath while continuing the drawing operation, removing the same from said bath, and passing a cleansing-current through the filtering-means in an opposite direction to the movement of the material being filtered. (23.) A filtering process comprising introducing a filtering-means into material to be filtered, drawing the said material through the filtering-means, removing the filtering-means from the said material, subjecting the filtering-means to a cleansing-bath, and passing a cleansing-current through the same in a reverse direction to the movement of the material being filtered. (24.) A filtering process comprising passing the liquid to be filtered through a suitable filtering-means, passing a cleansing-liquid through said filtering-means, and passing a current of air through the filtering-means in a reverse direction to the movement of the material being filtered. (25.) A filtering process comprising submerging filtering-medium within a liquid, drawing said liquid through said medium, removing said medium from said liquid, and submerging the same in a cleansing-liquid while continuing the drawing action, and finally removing said medium from the second liquid, and passing a cleansing-current through the medium.

(Specification, 9s.; drawings, 3s.)

No. 16847.—21st August, 1903.—TRISTAN D’ACUNHA CRESWELL MAXTED, of South Street, Blenheim, New Zealand, Plumber. Improved automatic self-sealing water-closet seat and nightsoil-receptacle.

Extract from Specification.—This invention consists in an automatic self-sealing water-closet seat and nightsoil-receptacle, operated substantially by levers and weights in such manner as set forth, and illustrated by drawings, in which the following numbers refer to the various members or parts of the said invention, and actuated as follows: 1, tread or step, which is hinged on floor or otherwise in front of seat, and is connected with sliding valves attached to under-side of seat 2, 2, by chains or cords working through pulleys 4, 4; these sliding valves are self closing by means of counterbalance weights 5, 5, when counterpoise is removed. On the under-side of seat there are parallel concentric flanges packed with material to form a spring or buffer to receive top edge of nightsoil-pan when pressure is applied from underneath the pan, as will be described when describing false bottom or floor. This constitutes the seat portion of the invention. The nightsoil-pan 7, 7, is to stand on a false bottom or floor 6, 6, which is raised by handles 8, 8, actuating rollers or excentrics 9, 9, which on pressure from right to left, or otherwise, raise the false bottom or floor and force the pan upward and