An apparatus for the registration of the humidity and acid content of a refrigerant or another non-polar liquid including a capacitive sensing element placed in the refrigerant or liquid and connected to an electrical evaluation circuit, the electrodes of the capacitive sensing element being formed of two different metals having different normal potentials, and the electrical circuit includes circuit elements for determining the resistive loss in the capacitive sensing element and circuit breake...

The invention relates to a fire simulation facility which accurately reproduces the thermodynamic and thermochemical parameters of a fire under controllable conditions. The facility utilizes a combination of a radiative and a convective heat source. The radiative source utilizes electrical resistance heater heating and a radiating surface having an emissivity of 0.8 to 0.9 or greater. The convective source generates hot gases in the form of chemical combustion products. The fire simulator also i...

This is an improved process of induction welding of steel pipe and an improved product of such process. After steel skelp is formed into a tubular blank with an open longitudinally extending seam, the seam edges are continually heated, converged and pressure-welded. Heat is applied to the converging edges in a novel manner to eliminate entrapment of harmful scale during welding, to prevent thermal stressing or cracking of the seam after welding, to arrest the growth of martensite and to produce ...

A tissue-embedding assembly is shown which is convertible to a resin option from a paraffin option. The tissue-embedding assembly permits the simultaneous embedding of multiple-tissue specimens with degassed embedding material. Full observation of the process as well as manipulation of the specimens is available during and up to solidification of the degassed embedding material. A novel heat transfer arrangement is available which permits the heating of paraffin to cause melting and embedding wi...

An opaque sensing device having a light-dependent resistor and a light source spaced apart so that material to be analyzed can be passed between them. The light-dependent resistor is connected to an impedance, such as a series resistor, across a voltage source to cause a fraction of the voltage to be present across the light-dependent resistor. A light source, such as a neon bulb, provides the only illumination to the resistor, and the impedance of the latter is therefore a measure of the opacit...

New and improved method and apparatus for the provision of a satisfactory physical and chemical barrier at a fluid interface in the nature of that which occurs at the interface of the separated plasma and packed cells layers in centrifuged blood samples are provided, and are embodied by barrier means which are of greater specific gravity than said blood plasma layer but lesser specific gravity than said blood cells layer and are operable, upon insertion into a centrifuged blood sample container,...

Plumbing apparatus for draining water from tubs and commodes or the like in a limited vertical space and with a single sewer connection, the apparatus including a connector having four arms, one of which has two inlets, with a sewer drain line connected to one arm, commode drain lines connected to two other arms, and tub drain lines connected to the two inlets of the fourth arm.

A fold-down cabinet for campers in which a counter assembly having a sink and stove is mounted on a base for movement between raised and lowered positions. The mechanism for raising and lowering the counter assembly consists of a plurality of levers connected to the counter assembly and to the base, permitting the base to swing outwardly, forwardly, upwardly and rearwardly as the counter assembly is moved from its lowered to its raised position. A drain fixture having a vent is connected to the ...

A goniostat for a diffractometer or an instrument of similar type which goniostat is rotatable about a first axis, the omega axis, and comprises a goniometer head rotatable about its central axis, the phi axis, which intersects the omega axis in the center of the instrument. The goniometer head is supported on one end of a supporting arm, which at its other end is mounted in the goniostat for rotation about a third axis, the kappa axis, which likewise intersects the omega and phi axes in the cen...

A measuring instrument and system for the determination of the partial oxygen and carbon dioxide pressures and of the pH value of a blood test sample having a thermostatized measuring vessel with a measuring capillary tube inserted therein to contain the blood test sample with three receiving bores in the measuring vessel and three measuring electrode units one of which being oxygen sensitive with the second carbon dioxide sensitive and the third being pH sensitive. Each of the measuring sensors...