Abstract: A tubular hypodermic needle syringe has a tubular sheath that slides over the exterior of the syringe to cover the needle. The sheath is locked over the needle by a latch that engages the syringe and the sheath. The latch is held in its locking engagement by a sliding collar that normally engages the latch to lock the latch but which is manually slidable to disengage the latch so that the sheath can be manually moved to expose the needle. A spring urges the collar to a latch engaging position to automatically lock the sheath over the needle.

Abstract: A diver's helmet is retained on the diver's skull by curved retainer rods hinged to each side of the helmet. Connected to the hinged rods are rotary handles operated by the diver to rotate the rods under the jaw and base of the skull to retain the helmet, and rotated away from the diver's head to permit doffing and donning of the helmet. The retainer can be combined with a neck dam to clamp the elastic dam against the diver's jaw and skull to prevent ballooning of the neck dam and thereby prevent a change in buoyancy. When the retainer rods are hinged to helmet they act to retain the neck dam to the helmet.

Abstract: A magnetic knife holder has the magnets covered top and bottom by a cowling. The cowling have a curved entry to guide the knife to the magnets. The cowlings have a restricted rear exit slot to reduce the angle of movement of knife with respect to the magnets if the knife is accidentally struck, to thereby assist in retaining the knife on the magnets.

Abstract: A split nut is made of elastic material that deflects under manual pressure. Each nut half has a projecting bead and a keyhole recess. The beads removably fit into the keyhole recesses to hold the nut halves together. Radial fins permit rotation by air jet and enlarge the size of the nut halves to make manual disassembly easier.

Abstract: An open top basin for receiving urine is inserted into the front portion of a conventional single cavity toilet bowl. The basin has a normally closed valve in the bottom of the basin to release the accumulated urine. A float rests on the surface of the water in the toilet bowl and is connected to the valve. When the toilet bowl is flushed, the water level drops, the float drops and opens the valve to release the accumulated urine into the toilet to be flushed away.

Abstract: An inclined security brace for a door extends from the door knob to the floor and has telescoping parts that are extended and retracted by an electric motor. A horizontal arm keeps the brace in an inclined position when the brace is retracted. The motor is activated by radio controls having a circuit that controls the direction of retraction or extension. When the extension operation causes the brace to engage the floor an over load of the electronic motor occur and this over load is sensed by the circuit to stop the motor. When the retraction operation results in the telescoping parts reaching a mechanical stop the over load is again sensed by the circuit to stop the motor. Preferably the same transmitted signal is used for retraction and extension and a flip-flop in the circuit automatically alternates extension and retraction. The brace prevents entry to a room by pass keys.

Abstract: Sound is induced in the head of a person by radiating the head with microwaves in the range of 100 megahertz to 10,000 megahertz that are modulated with a particular waveform. The waveform consists of frequency modulated bursts. Each burst is made up of ten to twenty uniformly spaced pulses grouped tightly together. The burst width is between 500 nanoseconds and 100 microseconds. The pulse width is in the range of 10 nanoseconds to 1 microsecond. The bursts are frequency modulated by the audio input to create the sensation of hearing in the person whose head is irradiated.

Abstract: A waterproof fabric cover is placed over the top of a cotton module which is a stack of compressed raw cotton having a rectangular horizontal cross section. The cover typically covers only the upper half of the module and frequently only the upper quarter or upper eighth. The cover has side walls longer than the end walls and these long side walls need hold down structures to hold the cover on the module during high winds. Secured to the bottom edge of the side walls are loops that are shorter in the center of the side wall and longer on each side of the center loop. The bottom ends of these loops define points on a catenary curve. A girth cord is passed through the loops and around the ends of the module at a level below the loops to define an approximate catenary curve along the side walls.

Abstract: A stencil is constructed from a stationary envelope and an insert sheet disposed in the envelope but free to be moved with respect to the envelope. The subject matter to be stencilled is cut through the envelope and through the insert sheet. The cuts create openings in the envelope, and when the openings are registered the full subject matter is stencilled. Artistic effects are obtained by moving the sheet slightly out of registry with the envelope and then stencilling.

Abstract: A torque responsive five-stage automatic shifting hub utilizes inner wrapped spring clutches to rotate a plurality of co-axial cylinders except for the cylinder at one end of the axis rotated by a sprocket. Gearing is interposed between the cylinders to rotate them at progressively different rpm. The wheel hub is rotated by outer wrapped springs, one over each cylinder, having one end secured to the hub and the other end floating. The outer wrapped springs automatically wrap on a cylinder rotating faster than the hub and automatically release a cylinder rotating slower than the hub. The inner wrapped spring clutches are actuated by compression springs between the cylinders which expand to actuate the associated clutch and compress to deactivate the clutch. The compression springs are of progressively different strengths along the axis of the cylinders.