Abstract: A chair has a pair of rodlike supports for contacting the ground, each of which have a first portion under the legs and seat which is curved to a first radius, and a second portion curved to a second radius different from said first radius. A flexible cover is mounted onto cross braces between the rodlike supports with the cover central portion being left hanging.

Abstract: A skylight window covering has a frame affixed to the room vertical or ceiling walls with a central opening lying opposite the skylight. A length of pleated fabric has one end secured to the frame and an opposite end held by a movable rail with ends sliding along the frame. A helically grooved rod has its ends journaled at one end to a 90.degree. gear box and is threaded within a nut on the end of the movable rail such that rod rotation adjustably positions the rail and pleated fabric. Resilient supports prevent the rod from drooping and are temporarily moved aside as the rail moves therepast and immediately spring back to supporting position. Adjustment driving of the rod can be accomplished manually or by a handheld electric motor.

Abstract: An infrared light emitter forms a beam of infrared (IR) light directed onto a set of mirrors or reflecting surfaces arranged to form a closed path about a swimming pool and spaced above the pool deck a sufficient amount so as to be intercepted by anyone who might walk through it. After the reflected beam has traversed the closed path about the pool, it then impinges upon a light detector. An electric circuit provides a continuous alarm which can either be sound or visual upon beam interruption and which must be manually reset before it becomes inactive. The monitoring system may be actuated so the operative state by a handheld radio frequency transmitter. Electrical power for the system can be a rechargeable battery which is recharged by a solar array mounted directly onto a part of the system obviating the need for interconnecting cable wiring.

Abstract: A pleated fabric window covering for an angular top or ceiling wall has the pleated fabric upper part cut at the required angle and the pleat lines are cut from the angular edge inwardly a fixed distance forming tabs. The tabs are overlapped and stapled to the upper rail flat surface. Manipulation of control cords positions the pleated fabric at any desired location below the upper rail lower end.

Abstract: A cooking and heating stove capable of operating on either gaseous fuel or electricity has a combination burner construction consisting of an annular metal plate with an electrical resistance heater located in recessed grooves on the undersurface, and a ceramic gas distributor int he central opening of the plate. Separate controls on a common housing are provided for the gas and electrical parts of the burner assembly.

Abstract: An electrical connector having plug and receptacle parts which can be mated with the parts oriented over a wide angular range relative to one another. The male contacts each include a pair of spaced apart, elongated blades which are received with a similarly dimensioned V-shaped slot in a female contact. A pair of spring loaded latch plates releasably lock the plug and receptacle together on mating.

Abstract: In eddy current testing of coated metal objects for corrosion, test values are arranged into fields corresponding to metal object and coating characteristics permitting direct readout of corrosion existence underneath coating without requiring coating removal.

Abstract: A wire loop reference transmitter is coupled with the excitation winding and the receiver winding of metal detection apparatus and which can be alternately opened and closed through a switch. In another version the separation of the reference phase transmitter reference signal from other signals is accomplished by periodically turning the reference signal off and on at a predetermined switching frequency. According to a further version this separation is achieved by a phase control demodulator controlled by a switched-on reference signal of a first controllable phase and by a switched-off reference signal with a control signal to obtain a 180 degree second control phase. Still further, control signals of a phase controlled rectifier can be at 90 degrees to the reference signal of the reference phase transmitter.

Abstract: A filter connector comprising a conductive housing containing a pin array traversing corresponding holes in a grommet, a dielectric body, a planar capacitor array, ferrite inductor beads mounted on at least some of the pins, a non-conductive body to insulate said beads from one another and from said capacitor, a non-conductive seal, a second capacitor array, a second grommet, a second interface seal a grounding cylinder surrounding said capacitor arrays and said beads in an electrical contact with a ring of contact fingers mounted in the interior of said housing. Optionally, a conductive O-ring encircles said shell, to improve shielding.

Abstract: A switching device having an open-ended hollow cylindrical housing with a number of slots in the sidewall. An insulative piston is slidably movable along the housing longitudinal axis and has a threaded central opening receiving a similarly threaded axle. A receptacle switch part fits onto a housing end and includes a central opening through which an unthreaded portion of the axle extends. Openings in the receptacle switch part each have a sleeve contact with outwardly extending tabs for electrical connection to cable wires, or the like. The piston has a plurality of pin contacts fixedly mounted thereto with portions extending from both sides of the piston for electrical connection to cable wires, for example, and which respectively align with a sleeve contact in the switch part. A further receptacle switch part is affixed to the housing other end. Rotative power drives the piston along the housing to effect connection between the contacts.

Abstract: A hypodermic syringe and needle combination with a releasable, automatic needle enclosing sheath. A syringe barrel having an open and a closed end includes first and second longitudinally extending guide channels for guiding push rods secured to the thumb platform of a plunger rod. Ball-end engaging sockets are located at the ends of the guide channels for capturing ball-ends secured to the needle sheath which is slidably supported and displaceable between (1) a first position where the needle sheath is locked by engagement of the ball-ends in the sockets and which exposes the needle, and (2) a second position where the needle sheath encases the needle. The needle sheath is spring biased so that it travels from the first position to the second position when the ball-ends are released from the sockets by pressure applied on the thumb platform which causes the pushrods to push the ball-ends out of the sockets.

Abstract: A tissue testing chamber having a hollow, electrically insulative housing separable into two parts or halves, each half including a plate-like working electrode and spaced therefrom an annular measuring electrode, with electrical leads provided to each of the electrodes for interconnection with external control and measuring equipment. Each housing half or test chamber half has a cavity communicating with both the working and measuring electrodes and an open end. The housing halves clamp the test specimen between them. A quantity of Ringer's solution is added to each housing cavity and the four electrodes are then connected in a four electrode impedance bridge with selectively variable impedances (e.g., capacitance) which on bridge balance provides capacitance of specimen.

Abstract: A first elastic strip or ribbon is folded into V-shape and provided with two button-and-loop connectors at the ends for fastening to an infant's shirt front. A nonelastic strip is secured to the foldover point on the first elastic strip. A second elastic strip is formed into a V-shape and provided with button-and-loop connectors at its ends for fastening to the shirt back. Hook-and-loop connector halves are located on the nonelastic strip and base of the V on the second elastic strip for adjustable and releasable securement.

Abstract: A needle sheath for completely encasing the needle of a disposable syringe is provided as a slidable attachment to the end of the syringe. The sheath is spring loaded. A push-button locking mechanism keeps the sheath in its unactivated position, leaving the hypodermic needle exposed, as needed for use. After use of the syringe, activating the button-locking mechanism causes the sheath to be driven by the spring mechanism to cover the length of the needle. The end flaps of the sheath that were held apart by the hypodermic needle close inward and overlap, completely encasing the needle.

Abstract: A drawer for mounting within a cabinet via telescoping slide parts, one part of which is affixed to an inner cabinet wall. The drawer has metal side panels, each of which has an upper edge bent into a flange forming a guideway with the flange having an opening and the adjacent drawer panel includes a lance. The other side part having an offset limit received within the drawer panel flange opening and an opening for receiving the drawer panel lance thereby securing the drawer and slide parts together.

Abstract: The inwardly facing portions of annular springs adjacent the inner edge thereof are formed into two or more regions of predetermined angular or curved slopes and radial extent. When the peak of a shaft cam passes an annular set of ball bearings between the springs, the loaded springs unload at a rate determined by each region slope and the radial extent of the regions to consecutively drive the shaft at corresponding rates and forces. To precisely obtain the desired spring characteristics, a composite spring can be used formed from a steel spring sandwiched together with a plastic member (e.g., nylon).

Abstract: A threat field sensor has a hollow metal enclosure with imperforate side walls except for a single aperture that is small as compared with the wavelength of interfering electromagnetic energy. A coaxial conductor is located in the enclosure cavity and has separate sets of leads interconnected to each conductor end. Electric signals induced in the coaxial conductor and present at the conductor ends by the external electromagnetic fields passing through the enclosure aperture are converted to two corresponding light signals. The light signals are transmitted to remotely located processing apparatus by an optical fiber link where the light signals are converted once again to electric signal counterparts. Summing and differencing these electric signals provides two final signals representative of the electric and magnetic field, respectively.

Abstract: A cornice for the headrail of a window covering has an elongated front panel with grooves on a front surface for receiving decorative slats and a pair of longitudinal slots on the back surface. Clips hanging on the headrail have parts received within the front panel. Adjustable length side plates are assembled to the front panel by end pieces.