Abstract:
An FM discriminator useful in a modem circuit includes a tank circuit coupled to an input receiving an FSK input signal. The FSK input signal is resistively coupled to an input of an operational amplifier having its output also coupled to that input. The other input of the operational amplifier is connected to the tank circuit and to an input of a comparator. The other input of the comparator is connected to the output of a circuit which produces a signal that lags by 90 degrees the signal produced by the tank circuit. The output of the comparator is used to synchronously chop the output signal of the first operational amplifier in such a way as to pass the operational amplifier output signal when the comparator output signal is a "1" and to invert the operational amplifier output signal when the comparator output signal is a "0". The tank circuit resonates at a frequency between the "0" and "1" frequencies of the FSK signal and, in combination with the operational amplifier, causes attenuation of components of the FSK input signal which are at the resonant frequency.
Abstract:
Fire resistant poly(phosphazene) vulcanizates can be produced as foams or as foam coatings. The resulting articles exhibit excellent flame retardancy.
Abstract:
The invention relates to a case assembly for antenna amplifying system, an antenna amplifying system and a mast antenna incorporating such a system. According to the invention, the case assembly for antenna amplifying system having a general shape elongated along a longitudinal axis (34) comprises a control module (16) and two amplifying modules (9a, 9b) aligned therewith along the longitudinal axis (34), the control module (16) and both amplifying modules (9a, 9b) each comprising two longitudinal lateral walls (11a, 11b, 11c, 12a, 12b, 12c), an upper surface (36a, 36b, 36c) and a lower surface (37a, 37b, 37c) and having a small thickness.
Abstract:
The invention relates to a case assembly for antenna amplifying system, an antenna amplifying system and a mast antenna incorporating such a system. According to the invention, the case assembly for antenna amplifying system having a general shape elongated along a longitudinal axis (34) comprises a control module (16) and two amplifying modules (9a, 9b) aligned therewith along the longitudinal axis (34), the control module (16) and both amplifying modules (9a, 9b) each comprising two longitudinal lateral walls (11a, 11b, 11c, 12a, 12b, 12c), an upper surface (36a, 36b, 36c) and a lower surface (37a, 37b, 37c) and having a small thickness.
Abstract:
A liquid filtering apparatus is placed in a vessel having a bed of filtration material and an intake for introducing unfiltered liquid, that includes a washbox, an airlifting tube extending from the washbox and including an intake end and means for introducing a primary gas to the airlifting tube, the airlifting tube passing through a central pipe, which extends from just below the washbox to a position just above the intake end. At least one screen cartridge is oriented in a generally angular downward direction in the bed and is in communication with an effluent chamber defined in part by the outer surface of the central pipe. A reject line extends from the washbox, and an effluent collector extends from the effluent chamber. A method of filtering and cleaning the filtration material is also disclosed.
Abstract:
A belt press having a frame with a first belt and a second belt rotatably mounted on the frame. A curved inlet guide is movably carried on the frame. The inlet guide has a decreasing radius of curvature from an inlet end to an exit end. A positioning assembly is mounted on the frame and is attached to the inlet end of the inlet guide to raise and lower the inlet end of the inlet guide.
Abstract:
A combustor liner includes a wall having an outboard surface and an opposite inboard surface. A plurality of first holes are inclined through the wall in a multihole pattern to channel cooling fluid therethrough to form a cooling film layer along the inboard surface. A second hole extends perpendicularly through the wall within the multihole pattern to form a shadow along the inboard surface devoid of the first holes. A transition hole extends through the wall in the shadow at a greater inclination than the first holes for cooling the wall at the shadow.
Abstract:
The claimed invention is a driver circuit for transmitting data via an output node thereof to a transmission line. The driver circuit includes a first driving device coupled to the output node and a second driving device also coupled to the output node. The driver circuit also includes a clamping device coupled to the output node. The clamping device clamps the output node at a first predetermined voltage level. A termination device is coupled to the output node of the driver circuit. The termination device includes a triggering device and a termination path. The triggering device is coupled to the termination path such that the triggering device causes a current flow via the termination path when a voltage at the output node exceeds a second predetermined voltage level. The second predetermined voltage level is higher than the first predetermined voltage level.
Abstract:
A first connector (12, FIG. 2) is constructed so when it is unmated from a second connector (14), front contact devices (32) of the first connector are switched from connections to conductors (16) leading to circuit component (70) to connection to a ground plane (110). The first connector comprises a front insert assembly (22) that includes a plurality of front contact devices (32), and a rear insert assembly (50) that includes a plurality of rear contacts (62). When the second connector fully mates with the first one (FIG. 3), the second connector pushes the front insert assembly to a rearward position (22B), against the force of a spring (40), to cause the front contact devices to mate with the rear contacts. When the second connector unmates from the first one, the spring moves the front insert assembly to the forward position. During forward movement, the front contact devices engage the ground plane (110), to thereby ground the front contact devices when they are not mated to the rear contacts.
Abstract:
An apparatus for controlling weeds and undergrowth by the application of hot water thereto. The apparatus is particularly characterized by its construction including an endless, ground-engaging belt, or apron, disposed immediately aft of the hot water spray. Thus, when hot water is sprayed on the weeds and undergrowth, the sprayed vegetation is not only compressed by the apron, but also heat from the water is retained therein, insulated from ambient conditions by the apron.