Motorola Corporation

Mark Controls Corporation

Arnold Vincent Dano

Jerome Peter Friedrichs

Jerry James Tomaszewski

Roland Aaron Gladstone

A fluid flow pressure control valve includes a valve body having a chamber divided by a dashpot plate into an inlet chamber and a dampened flow region chamber. A diaphragm senses the fluid pressure forces in the chamber with an adjustable spring force acting to balance the fluid pressure forces exerted on the other side of the diaphragm. By varying the spring force with a follower piece, which moves axially along a stationary threaded shaft, the amount of fluid pressure necessary to balance the spring force can be selectively varied. The follower can be blocked from travel beyond selected locations by stops positioned on the valve housing and thus a plurality of desired pressure values can be reliably chosen. Fluid flow induced oscillations of the compact, easily installed valve are attenuated by a dashpot means which includes the dashpot plate with an aperture therethrough providing communication between the inlet chamber and the dampened flow region chamber.

Flow control valve

A unitary molded socket provides mounting for non-temperature compensated crystals, a resistor heating element for each crystal, and a thermistor. Each heating element is positioned adjacent a crystal housing for preventing the housing temperature from going below a given temperature. The thermistor is thermally coupled to one of the resistors for sensing its temperature and electrically coupled to control circuitry for providing the appropriate heating current to the resistor heating elements. A spring clip biases each crystal against its resistor, clamps it into the socket and is pivotable for replacement of components.

Thermally stabilized crystal mounting assembly

A housing for a mobile transceiver has integrally molded aligning and locking features to allow assembly without tools. As the metal support frame and attached printed circuit board enter the housing, short legs on the lower edge of the frame provide support and positioning for guiding the edges of the PC board into molded guide rails along the inner side walls of the housing and into molded locking clips on the inner front wall of the housing. The top rear of the housing is molded with a slight concave bow. The top and bottom rear edges of the housing have ramp portions for admitting the rear of the chassis. As the frame is forced home, a portion of the top rear of the frame pushes on the upper ramp, forcing the top of the housing to yield. Tabs on the bottom rear of the chassis ride up the lower housing ramp and are forced into slots in the housing bottom by the bias of the bowed housing top section. The outer end of each control knob has an indentation which mates with a molded support and alignment pin on the inner front wall of the housing. For both safety and aesthetic reasons, no locking members, controls or pushbuttons protrude beyond the outer contours of the housing.

Growing community of inventors

Park Ridge, IL, United States of America

Arnold Vincent Dano