A regulation device and method for regulating an air flow, a gas flow or an equivalent medium flow in which slats can be moved to form an adjustable flow passage in their interior and have lateral edges overlapping each other. The cross-sectional flow area of the flow passage defined by the slats in their interior is adjustable by displacing the slats. A wire is passed around the slats and is displaceable so as to displace the slats and thus regulate the flow passing through the flow passage def...

Regulation of the flow and pressure of the respiration gas in a respirator coupled to a patient is disclosed in regard to a respirator arrangement having a flow and pressure measuring device arranged proximate the patient connection for determining the flow and pressure of the respiration gas and converting the magnitudes, measured into electrical signals and also valve means arranged between the respiration gas source and the measuring device for controlling the flow and pressure of the respira...

There is disclosed a class of .alpha.,.alpha.-disubstituted-5-pyrimidinemethanes and substituted methanes which are useful as plant growth regulators. Internodal elongation of plants is inhibited by treatment with a compound of this invention.

For use in a sprinkler system a pressure and flow regulation device comprising a snap acting valve which includes a movable valve closure having a spring biasing the valve closure toward a closed position and a diaphragm having a surface disposed to be acted upon by inlet water pressure to urge the valve closure to an open position against the bias of the spring, only when a predetermined inlet pressure is reached, and a pressure regulator constructed integrally with the snap acting valve for au...

A digital tachometer provides a signal proportional to output speed which clocks a multivibrator whose "on" time is selectively set as a function of desired speed. The output is filtered and any deviation from one-half the peak voltage becomes the speed error signal which is pulse width modulated to provide an error signal to the prime mover. Proper selection of multivibrator parameters provides for a plurality of output pulse widths which accommodate sensitive speed regulation over a low speed ...

A thermostatic regulating device for the surface of a heating cylinder of a cooking appliance consisting essentially of a stretched metal wire applied along a spiral path with a wide helix angle to the surface of the cylinder, the variations in the length of the wire due to heat-induced expansion or contraction acting after amplification on a microswitch incorporated in the heating circuit for said cylinder.

The combination of 2-chloroethylphosphonic acid and one or more chemical inhibitors of plant growth such as 3-trichloromethylsulfonamido-p-acetotoluidide or a water soluble salt thereof alters the morphology and growth pattern of non-tropical turf grasses when applied thereto, resulting in healthy turf grasses which exhibit predominant lateral growth and suppressed vertical growth. The coordinating combination of the two growth regulating agents is most effective when applied as an aqueous mixtu...

A growth regulation process involving certain phosphonic acid compounds having the general formula: ##SPC1## The growth regulation process of the present invention relates mainly, though not entirely, to the inducement of an ethylene response or ethylene-type response in plants and part thereof including, but not limited to, stems, roots, leaves, flowers, buds, and harvested as well as unharvested fruit. The method of the present invention produces a wide variety of plant growth responses includ...

A device for temperature regulation has a contact housing which is provided ith a movable contact spring for breaking a circuit and on which a fastening flange is fastened. Furthermore, there is a tube of low thermal expansion, in which a bar with a high coefficient of thermal expansion is arranged so as to be longitudinally displaceable. That end of the tube located on the same side as the switch is supported in a concave receptacle arched in the direction of the contact housing.

A regulation for a gas engine with a rotational speed probe for the crankshaft rotational speed, with a rotational speed-load-ignition angle-performance graph memory read out during each crankshaft rotation, with an ignition pulse generator controlled by the performance graph memory, with a lambda-probe, with a load probe, with a vacuum-controlled gas pressure adjusting device for the propulsion gas and with a flow-mixing device for the propulsion gas and the air. The invention provides a regula...