Abstract: There is disclosed an improved unitary sealing ring that is used on the shafts of rotating elements. The ring has first and second axial faces. The second face has a recess forming a flange therein. At least one annular groove extends along the inwardly radially extending surface. A first axially and longitudinally extending groove communicating between the annular groove or grooves and the axial face. A second longitudinally extending groove extends from the first face to the second face on the outer surface of said ring. The annular groove or grooves function as an oil groove or grooves and the axially and longitudinally extending grooves are designed to accumulate foreign particles that may be incursive with respect to the journalling means of a driving or driven device. These foreign particles are then expelled to the second axially and longitudinally extending groove due to the centrifugal force when the device is being operated.

Abstract: Skin Fold Caliper having first and second relatively rigid arms which have one end of each of the first and second members connected to permit pivotal movement of the first and second arms with respect to each other so that the other ends of the first and second arms can be moved between open and closed positions. A gauge is carried by the first and second arms for giving an indication of the spacing between the other ends of the first and second arms. A spring-like member formed integral with one of the arms is utilized for applying a predetermined clamping pressure between the first and second arms to move the other ends of the first and second arms toward the closed position.

Abstract: There is disclosed improved sealing rings having two complementary parts. The sealing rings are used on the shafts of rotating elements. The first ring has an annular face with a recess therein and adapted and constructed to mate with an axially extending flange which extends from the annular face of the second ring. The flange has grooves on the radially outwardly facing surface. The inwardly facing wall of the recess also possesses grooves. Additionally, there is a communicating orifice through the first ring to communicate with the recess. The various grooves are designed to accumulate foreign particles that may be incursive with respect to the journalling means of a driving or driven device. These foreign particles are then expelled through the aforementioned orifice due to centrifugal forces while the device is being employed.

Abstract: A method for the determination of amylase, based on the cleavage of colorimetric, ultraviolet absorbing or fluorometric substances, commonly referred to as chromogenic substances as p-nitrophenol derivatives of oligosaccharides of chain length 4-10 glucose units. Oligosaccharides of this chain length are resistant to cleavage by .alpha. and/or .beta.-glucosidase and contain endo-.alpha.-1,4 linkages which are required for amylase activity. Cleavage of the .alpha.-1,4 bonds by amylase produces smaller fragments which are acted upon by .alpha.-glucosidase and/or .beta.-glucosidase to liberate a chromophore. The rate of appearance of the chromophore is proportional to amylase activity and lends itself to either rate or endpoint determinations. The qualitative or quantitative measurement of amylase concentrations in a sample is useful in medical diagnosis.

Abstract: A disposable medicament injector having a cylindrical barrel closed at one end by a slidable plunger and at the other end by a nose cap and diaphragm assembly including a flexible and pierceable wall defining a medicament chamber between the plunger and the flexible wall. A spike is positioned in spaced relation to the flexible wall whereby movement of the plunger will cause the medicament in the medicament chamber to flex the flexible wall of the diaphragm toward the spike which will then pierce the flexible wall to establish fluid communication between the medicament chamber and the area on the other side of the flexible wall.

Abstract: A disposable additive syringe having a cylindrical barrel closed at the rear end by a slidable plunger and at the front end by a diaphragm assembly including a flexible and pierceable wall defining a medicament chamber between the plunger and the flexible wall. A cap and spike assembly mounted on the front end of the cylindrical barrel, said spike being positioned so that its end will be spaced from and outside the flexible wall and having a passage therethrough, a cannula extending forwardly from the cap and in fluid communication with the spike, a cylindrical safety guide extending forwardly from the cap and surrounding the cannula, a spike mounted by the safety guide and in fluid communication with the cannula, and a sheath supported by and covering the spike.

Abstract: A mixing and dispensing disposable medicament injector having a cylindrical barrel closed at one end by a slidable plunger and at the other end by a first diaphragm assembly including a flexible wall. A second diaphragm assembly is positioned within the barrel intermediate the ends thereof to divide the barrel into two sealed chambers, a first chamber between the plunger and second diaphragm assembly being adapted to contain a liquid and a second chamber between the second diaphragm assembly and the first diaphragm assembly being adapted to contain a medicament in dry form. The second diaphragm assembly has a rupturable flexible wall to allow liquid to flow into the second chamber and the flexible wall in the first diaphragm assembly being rupturable to allow the mixed liquid medicament to be dispersed from the injector through the cannula fluidly connected to the first diaphragm assembly.

Abstract: A medicament dispensing unit having a cylindrical barrel closed at one end by a slidable plunger is provided at the other end with a diaphragm assembly including a flexible wall defining a medicament chamber between the plunger and flexible wall. A needle is positioned in spaced relation to the flexible wall whereby movement of the plunger will cause the medicament to flex the flexible wall toward the needle which will then pierce the wall to establish fluid communication between the medicament chamber and the area at the other end of the needle. A finger grip is located on the plunger end of the barrel while a nose cap assembly is affixed to the diaphragm end of the barrel.

Abstract: A disposable medicament injector having a cylindrical barrel closed at one end by a slidable plunger and at the other end by a diaphragm assembly including a flexible wall defining a medicament chamber between the plunger and flexible wall. A needle is positioned in spaced relation to the flexible wall whereby movement of the plunger will cause the medicament to flex the flexible wall toward the needle which will then pierce the wall to establish fluid communication between the medicament chamber and the area at the other end of the needle. A finger grip is retained on the plunger end of the glass barrel by the engagement of the inner and outer surfaces of the barrel by a pair of spaced circumferential walls extending from the finger grip. A nose cap assembly is affixed to the diaphragm end of the glass barrel in a similar manner.

Abstract: A thermoplastic bottle for sterile medical liquids with a dispensing outlet closed off by an inner closure. An outer closure in the form of a thermoplastic cap overlies the inner closure. During steam sterilization at 240.degree. to 260.degree. F (116.degree. to 127.degree. C) the outer cap deflects inwardly against the inner cap to force the inner cap into a tighter seal against the bottle. This outer cap includes external left-handed threads and has a lateral frangible brim fused to the thermoplastic bottle. A threaded jacking ring is screwed onto the outer cap and with a counterclockwise motion acts to (1) fracture the cap's external brim and (2) separate the outer cap from the sealed inner cap.

Abstract: A medical liquid bottle having a threaded neck of one thermoplastic material is blow-molded at pressures of 50 to 150 psi (3.52 to 10.1 kg/cm.sup.2) so there is a low amount of internal stress in the neck. A cap of a different thermoplastic material is injection molded at pressures of 5,000 to 20,000 psi (352 to 1,410 kg/cm.sup.2) producing a very high internal stress in this cap. After liquid has been placed in the bottle and the cap assembled to the neck, the bottle with the combined cap and neck are stress relieved by subjecting to steam sterilization at 240.degree. F. to 260.degree. F. (116.degree. C. to 127.degree. C.). This causes the cap to shrink more than the neck and to form a bacteria-tight thermoplastic-to-thermoplastic hermetic seal. Despite this very tight hermetic seal the closure is openable with an unexpectedly low unscrewing torque of 10 to 30 inch-pounds (11.5 to 34.5 centimeter-kilograms) manually applied by a nurse or physician.