A thermometer adapted for immersion in a liquid includes a monolithic casing matrix. A plurality of liquid crystal display portions are embedded in the casing matrix. The liquid crystal display portions each have a liquid crystal agent with an optically perceivable condition at a temperature or temperature range. Indicia of the temperature or temperature ranges can also be provided.

An inflatable pool which comprises a base sheet and a hollow-shaped inflatable wall having its bottom end heat-sealed to the edge of the base sheet. The wall is provided with outer heat seal seams and inner heat seal seams which are extending axially and dividing the wall into a plurality of elongated air compartments intercommunicated and structurally interconnected. The outer heat seal seams are staggered with respect to the inner heat seal seams and the upper portion of the wall is a continuo...

There is disclosed a device for dispensing a chemical wherein a stack of dry chemical tablets are contained within a receptacle. Sealing means are provided to seal around each tablet and the inner wall of the canister so that only the upper surface of the top tablet is exposed to the circulating water. The tablets are not exposed to the flowing water until the tablets above have been eroded away successively to provide leak paths around them.

The specification describes the combination of a unitary water container or pool and a pair of play balls, the pool having a generally planar bottom wall and a peripheral rim surrounding the bottom wall and extending upwardly therefrom, the peripheral rim being formed in the shape of an animal and including recesses defining eye sockets, the play balls being shaped and dimensioned to be removably received in the recesses and arranged to have iris and pupil defining markings thereon.

A pool cleaner for swimming pools comprising a body (10) which includes a first inlet end (12), a second outlet end (14) and an intake portion (16). The intake portion (16) has a roof (22), a pair of side walls (24) which depend from the roof and an open front which provides the first inlet end (12), but no floor. A removable water-pervious collection receptacle (28) is mounted on the body (10) about the second outlet end (14) thereof. A coupling means (30) is mounted on the body (10) for coupli...

A device for removing foreign matter from a water-filled pool comprising a vacuum head equipped with a conduit connectable between suction means and a chamber-defining housing, and at least one agitation member rotatably connected to the inside of said chamber in position to be rotated by fluid suctioned from said chamber into said conduit such that turbulance caused by said rotation may dislodge fine particulate material from a pool surface.

A swimming pool includes a swimming tank, which stores water for swimming; and an upstream tank, which stores water to be supplied into the swimming tank. The pool further includes a downstream tank, which stores the water streamed from the upstream tank through the swimming tank; and a pump, which forces the water stored in the downstream tank to the upstream tank. The water in the upstream tank has an energy head that is higher than the water in the swimming tank so as to generate water curren...

An adjustable bottom for swimming pools wherein the raising and lowering mechanism is self-locking including positive and gradual movement in the raising and lowering of the adjustable bottom including means outside the pool for operating the mechanism.

An in-ground swimming pool of completely plastic construction is comprised of a wall portion having the upper edge thereof substantially at ground level and a flexible plastic liner which is secured to the top of the wall portion and completely covers the interior sides of said wall portion and the bottom portion of the pool. The wall portion is comprised of a plurality of extruded plastic panels interconnected with each other by means of integral tongue and groove members on the panels which ar...

An in-ground swimming pool, includes rigid planar ends, a pair of parallel inwardly-extending curved flanges on each said end, the sides and bottom being a sheet of flexible springy sheet material, capable of transportation in rolled form, the edges of said sheet being engaged between said flanges and a highly-compressed gasket of resilient material between said sheet and the inner flange of each said pair.