A laparotomy sponge is disclosed having a central ply of rayon and polypropylene sandwiched between two piles of gauze.

The energy interlock system is designed for a linear accelerator having no electron beam bending system. The accelerator emits electron pulses which are directed to a target for generation of X-ray pulses. The interlock system contains an ionization chamber, a discriminator and a switch. The ionization chamber is exposed to the X-ray pulses for measuring their intensity distribution. It comprises a control electrode and a plurality of electrode segments. The discriminator is connected for detect...

The energy interlock system contains a measuring device, a discriminator and a switch. The measuring device determines the level of the particle beam pulses which are emitted by the accelerator. For this purpose it contains a target which is exposed to the particle beam pulses. The discriminator determines whether the level of the particle pulses has crossed a predetermined value. The switch is operated by the discriminator. It is connected for supervision of the accelerator.

A buoyancy element (200) is disclosed which comprises a moulded body of plastics-composite material incorporating reinforcement (202) comprising at least one elongate flexible member or filament, embedded in the body and adapted to retain fragments of the buoyancy module together following structural failure of the module.

A conical recreational device for providing recreation and exercise. The conical recreational device includes a tubular housing having a first open end and a second open end. The tubular housing has a generally frusto-conical shape. A peripheral lip is attached to and extends around an edge of the first open end. A sleeve for extending into the first open end of the housing has a first end, a second end and a peripheral wall extending between the first and second ends. The first end of the sleev...

Apparatus for coupling a fishing line to a fishing lure. The apparatus includes a pin having a laterally inner portion coupled to the lure, for receiving a lure coupling loop and a laterally outer large portion for inhibiting lateral displacement of the lure coupling loop from the laterally inner portion. The apparatus further includes an adjustable lure coupling loop which is expansible and contractable to provide an eyelet having a reduced size for coupling to the laterally inner portion of th...

A farrowing pen is provided for accommmodating and confirming a sow or the like within a given space wherein the confined sow is permitted limited movement within the space without causing accidental injury or death to her piglets. At least one of the elongated side walls of the pen is provided with a plurality of longitudinally spaced elements. The elements are mounted for adjustment to selected positions relative to the remainder of the side wall to provide maximum nursing space for the piglet...

A refrigerant filter/dryer assembly isolates, removes, and replaces a filter/dryer core, and allows the vapor-compression heat pump system to continue to operate while the filter/dryer is being replaced. The refrigerant flow is automatically by-passed and the filter/dryer core is isolated for removal. The filter/dryer easily connects back into the refrigerant flow path. An indicator can be provided for indicating the remaining useful life of the filter/dryer while it is being used in the system.

A snag-proof protector for a fishing hook formed of resilient plastic material and providing a conical skirt about the shank of the hook, with the small end of the cone facing the barb of the hook and the large open end of the conical skirt facing the line attaching means of the hook.

Double drain apparatus for concurrently draining vertically spaced portions of a bathtub or the like containing liquid, such as water, comprising an upstanding drainpipe having upper and lower drain openings therein, valve mechanism for controlling the flow of liquid through the upper and lower openings including upper and lower hollow stopper cylinders mounted in the drainpipe for sliding movement between positions blocking the upper and lower openings and vertically spaced drain positions. Mec...