Abstract: It has been shown by Photon Correlation Spectroscopy than when additional hardener is added to below saturation gel-grafted polymer particles, the gel layer shrinks due to hardening, as there is no free gel left in solution. In films, such case-hardened gelatin-grafted soft polymer particles can act as highly elastic stress absorbing fillers. This is because the dry case-hardened shell is expected to form a thin hard shell around the soft polymer particles. It is shown that gelatin-grafted soft polymer particles and case-hardened gelatin-grafted soft polymer particles, incorporated in the emulsion layers of pressure sensitive photographic products, produce coatings with highly reduced pressure sensitivity without any developability or delamination concerns. In this invention the case-hardened gelatin-grafted polymer particles are preferred over the simple gelatin-grafted material. The core polymer particle can have diameters anywhere between 10 to 10.sup.

Abstract: It has been shown by Photon Correlation Spectroscopy that when additional hardener is added to below saturation gel-grafted polymer particles, the gel layer shrinks due to hardening, as there is no free gel left in solution. In films, such case-hardened gelatin-grafted soft polymer particles can act as highly elastic stress absorbing fillers. This is because the dry case-hardened shell is expected to form a thin hard shell around the soft polymer particles. It is shown that gelatin-grafted soft polymer particles and case-hardened gelatin-grafted soft polymer particles, incorporated in the emulsion layers of pressure sensitive photographic products, produce coatings with highly reduced pressure sensitivity without any developability or delamination concerns. In this invention the case-hardened gelatin-grafted polymer particles are preferred over the simple gelatin-grafted material.

Abstract: An electrical flowmeter having signal electrodes laterally spaced along a line perpendicular to fluid flow and sensitive to a voltage field set up in the fluid by a magnetic field is provided with a plurality of planar helically coiled conductive windings disposed in stacked arrangement parallel to the direction of fluid flow. The spiral windings are connected to a push-pull current drive source. The signal electrodes are spaced proximate to the outer coil winding of the coil closest to the fluid. The windings of the coils are alternately oriented in opposite, clockwise-counterclockwise disposition. Each spiral coil ends in an inner and an outer terminus, and the inner termini of all coils are connected together, while the outer termini of the clockwise disposed coils are connected in parallel with each other. The outer termini of the counterclockwise disposed coils are also connected in parallel with each other.

Abstract: An electrical flowmeter having signal electrodes laterally spaced along a line perpendicular to fluid flow and sensitive to a voltage field set up in the fluid by a magnetic field is provided with helically coiled conductive windings disposed in a laminar arrangement in a plane parallel to the direction of fluid flow and wound in a helical spiral and connected to receive alternating current. The signal electrodes are spaced proximate to the outer coil windings, and a neutral electrode is provided at the helical vertex of the windings. The electrical field set up in the fluid impresses a voltage field across the signal electrodes proportional to relative fluid velocity and immune from quandrature and hydrodynamic effects.

Abstract: An inclinometer having a pendulum means pivotally mounted within a housing, the pendulum having a circular sector member mounted thereon which is rotatively coupled to a roller by means of a coupling strap between the sector and roller. The ends of the coupling strap are fixed in place on the ends of the circumference of the sector and the strap encircles the roller. The roller is coupled to a rotating pointer mounted on the housing. The coupling strap has two parallel sections on one side of the sector which develop into a single section on the opposite side of the sector.

Abstract: An electromagnetic flow meter construction for substantially flush mounting within a surface past which a fluid is to flow. A pair of spaced electrodes in contact with the fluid are mounted along a line perpendicular to the fluid flow and an elongated electromagnet provides magnetic lines of force substantially perpendicular to both the fluid flow and the line of the electrodes to generate an electrical potential between the electrodes proportional to the fluid velocity.The electrode leads are oriented with respect to the electromagnet to minimize the quadrature voltage and the electromagnet is bifilar wound and utilized in a push-pull alternating current driving circuit. The electrode signals are applied to a synchronous detector to generate a direct current voltage proportional to the fluid velocity.