A parabaloidal reflector adapted to receive an elongate light source along the axis of the reflector includes a number of fluted portions arranged in a repeated pattern over the surface of the reflector. The reflector achieves more uniform light reflection because adjacent fluted portions are concave or convex when viewed in cross-section and which merge in a geometrically discontinuous manner. The radius of curvature of the fluted portions in cross-section is the same from the widened open port...

The invention relates to a susceptor for heating bodies by means of high frequency energy. The lower side of the susceptor comprises a profile which consists of longitudinal grooves present near the side surfaces. By means of said grooves on the lower side, a homogeneous temperature distribution is obtained on the upper side transversely over the susceptor.

The invention relates to producing a cylindrically-built belted tire, the subsequent expansion of which extrudes columns of an adjoining rubber layer into a knit belt, whose loops during extension of the belt to its restrictive condition close and lock around the columns.

Brush having adjustable hardness includes a bristle plate, a perforated disc member and a cover member located adjacent the bristle plate at opposite sides thereof, means for adjusting the perforated disc member in position relative to the bristle plate, the adjusting means including an externally threaded pin and an internally threaded hollow shaft substantially centrally located on one of the members, respectively, and threadedly engageable with one another through a substantially central open...

The subject of this invention is an element having bimetal properties and made of a composite fiber material comprising a matrix material and at least one group of fibers embedded therein. The bimetal properties may be achieved by using a matrix material having a coefficient of thermal expansion differing from that of at least one group of embedded fibers. Alternatively, the coefficients of thermal expansion of at least two groups of embedded fibers may differ from each other to achieve such pro...

A surgical lancet which has a blade resiliently driven to lance dermal tissue with a snap action has a presser foot that forms a cavity directly over the dermal tissue being lanced and has a cavity-encircling rim for placing against tissue adjacent the lancing site. The rim presses against the dermal tissue to pucker tissue at the lancing site into the cavity and to constrict veinal capillaries adjacent the lancing site. The puckered tissue ensures that the lance is not pressed into bone structu...

A projectile including, a housing, an optical tracker, and a gyroscope disposed within the housing, the housing having a nose section and a base section forming a chamber enclosing the tracker and the gyroscope, the nose section having a window, the optical tracker having an optical lens unit and an image detector unit mounted on the gyroscope, the optical unit being arranged to receive an image through the window and to transmit the image to the image detector unit, the gyroscope comprising, a ...

Magazine having a casing body and a cover plate and provided with latch means for preventing the cover plate from being inadvertently removed from the casing body. The latch means comprises a swingable lever pivoted to either one of the casing body and the cover plate at the inside thereof so as to be swung between the latching position and the unlatching position. The swingable lever is normally urged toward the latching position by a spring and is provided with a hook at its free end having an...

A toothbrush of normal configuration and structure has a relatively small well on the side of the brush having the bristles and in relative proximity thereto. The well contains an antimicrobial material which is sparingly soluble so that as the brush is wetted the moisture will dissolve a small portion of the antimicrobial agent which is then distributed over the bristles by capillary action thereby sterilizing them.

A clock having a timer wherein the operations of an electric circuit controlling switch and an alarm are controlled by a timer mechanism comprising a time set drum and an hour wheel which is moved toward the drum by a distance at a preset time on said drum and is further moved toward the drum by a further distance at the expiration of a predetermined time interval of, for example, ten minutes due to two stage engagements between cam members on the set drum and the hour wheel. Said two stage move...