A therapeutic aid comprises a fluid-filled cushion formed from sheets of synthetic plastics material welded together with a weld line dividing the interior of the cushion into two compartments. This weld line is interrupted to provide a flow opening allowing fluid to flow between the two compartments and the portions of the weld line adjacent the opening having rounded edges and are of increased width.

A learning aid particularly useful by one learning a foreign language, includes an openable box containing a double reel and web assembly wherein the web has printed matter on it which can be viewed through a window area of the cover of the box, and the box contains cartridge means for carrying the double reel and web assembly during insertion of the assembly in and removal of the assembly from the box. This permits quick insertion and removal of the cartridge means and the double reel and web a...

There are disclosed several embodiments of a visual aid for use in teaching calculus, each having in common a support means defining X and Y axes, and means mounted on the support means to describe a geometrical shape which is generated by the revolution of an area bounded by a curve about one of the axes.

A teaching aid or the like comprising an open frame, a plurality of slide members reciprocal in the frame, and a pair of lenses extending across the open frame perpendicular to the general direction of reciprocation of the slide members. Each slide member has a pair of opposite faces, each face having formed thereon various indicia in lines. An indicia line on one face of a slide corresponds to an indicia line in the same relative position along the slide member on the opposite face of the slide...

Apparatus cooperates with a machine readable record member to accumulate a dietary journal. The apparatus includes a plurality of displays arranged for one-by-one exhibition. Each display includes at least one food item representation and, in association therewith, indicia describing discrete selectable quantities of the represented food item. Each food item representation comprises a written description of and a picture illustrating the represented food item. The record member, advantageously a...

A sex aid apparatus is disclosed utilizing an extended geometrical shaped handle for interchangeable attachment to intra-vaginal or anal penetration appliances and the manual manipulation thereof.

Propylene glycol esters of propionic acid are added to silage to improve the quality thereof.

A disposable hearing aid insertable into an ear canal which includes a microphone which translates acoustic energy into electrical signals, signal processing circuitry which processes the electrical signals provided by the microphone, a receiver which converts the processed electrical signals into acoustic energy, and a power source permanently disposed within the hearing aid such that the source is substantially non-removeably integrated with the hearing aid.

A punching aid includes a column disposed above a base, a pad adjustably attached onto the column, and a flexible device secured between the base and the column to provide a flexibility to the column relative to the base. The flexible device includes two couplers secured to the ends. The couplers each has a protrusion and a disc engaged into the flexible device for securing the flexible device to the base and the column. A protective sleeve is engaged onto the flexible device for shielding the f...

The walking aid includes a stick body inclined in the forward-and-backward direction so that the lower end thereof is positioned forward, a support rod installed behind the stick body and inclined so that lower end thereof is positioned backward, and wheels provided on both sides of the lower end of the stick body and on both sides of the lower end of the support rod, steering being carried out by turning the stick body, wherein a rocking mechanism is provided at the wheel installation portion o...