摘要:
An apparatus for deflecting leaking oil comprising a first L-shaped member comprising a pivot arm and a latch mechanism and a second L-shaped member that is slidably coupled to the first L-shaped member. The pivot arm on the first L-shaped member is configured to pivot on the first L-shaped member and to engage with a plurality of recesses on the second L-shaped member. The latch mechanism is configured to lock and unlock the pivot arm. The first and second L-shaped members each comprises a flat center surface and two flat side surfaces that form a channel on an underside of the L-shaped members. The channels are configured to fit around at least one flange on a heater treater.
摘要:
An apparatus for deflecting leaking oil comprising a first L-shaped member comprising a pivot arm and a latch mechanism and a second L-shaped member that is slidably coupled to the first L-shaped member. The pivot arm on the first L-shaped member is configured to pivot on the first L-shaped member and to engage with a plurality of recesses on the second L-shaped member. The latch mechanism is configured to lock and unlock the pivot arm. The first and second L-shaped members each comprises a flat center surface and two flat side surfaces that form a channel on an underside of the L-shaped members. The channels are configured to fit around at least one flange on a heater treater.
摘要:
A logic function module comprises a plurality of input nodes and an output node. A first control circuit has at least one input connected to one of the input nodes, a first output, and a second output which is the complement of the first output. A second control circuit has at least one input connected to one of the input nodes, a first output, and a second output which is the complement of the first output. A first switching circuit is connected between one of the input nodes and the output node and is controlled from the first output of the first control circuit the first output of the second switching circuit. A second switching circuit is connected between one of the input nodes and the output node and is controlled from the second output of the first control circuit the first output of the second switching circuit. A third switching circuit is connected between one of the input nodes and the output node and is controlled from the first output of the first control circuit the second output of the second switching circuit. A fourth switching circuit is connected between one of the input nodes and the output node and is controlled from the second output of the first control circuit the second output of the second switching circuit.
摘要:
A circuit arrangement for reducing a reference supply voltage level of a reference generator for an ECL circuit during a power-down mode includes a reference generator for producing a reference supply voltage. A first switching network is connected to the input of the reference generator for disabling of the input of the reference generator in response to a control signal so as to reduce the level of the reference supply voltage. A second switching network is connected to the output of the referenced generator for disabling of the output of the reference generator in response to the control signal.
摘要:
A catalyst composition for the polymerization of olefins comprising the combination of one or more Ziegler-Natta procatalysts comprising one or more transition metal compounds; one or more aluminum containing cocatalysts; and a mixture comprising two or more selectivity control agents (SCA's), corresponding to the formula: (CH3O)nSi(OR)4-n, wherein R, independently each occurrence, is C2-12 alkyl, C3-12 cycloalkyl, C6-18 aryl or (poly)alkyl-substituted aryl, or C7-18 poly(aryl)-substituted alkyl, and n is an integer from zero to 4.
摘要:
A ringback circuit in a security protection system, of the type which monitors a dc current, automatically reports to remote premises that the central station has, at an appropriate time, received an indication that the dc current has been changed to the normal current level for night operation. At the central station, a change in the current level from normal daytime to normal nighttime current is sensed, activating an oscillator. An electronic current limiter in the communications line responds to the oscillator through an isolation circuit, oscillating the current in the communications line, which activates a buzzer at the remote premises.
摘要:
Each zone of a double-detecting loop type alarm system utilizes a current level detector to produce a digital signal when normal current flow in the detecting loops is interrupted. The digital signal so produced is stored in a holding register, whose output drives electronic shunting switches connected across the ends of the detecting loops. Closing of the switches permits current to again flow to the current level detector and detecting loops, causing the current to return to a normal current level if the interruption was caused by a break or short in a detecting loop; this permits that zone of the alarm system to again function. Since the system is digital, its ouputs and those of the other zones are presented by means of other digital transmitting and monitoring devices, such as a binary multiplexer.
摘要:
An ECL circuit comprising an output transistor having a base, a resistor coupled to the base, a first circuit responsive to a deselect signal OE for drawing a first current through the resistor and a second circuit responsive to the deselect signal OE for drawing a second current through the resistor, said first and said second currents combining in said resistor for providing a predetermined turn-off bias potential on said base of said output transistor. The predetermined turn-off bias potential reduces the emitter current of the output transistor such that the noise immunity of a data bus is preserved when a plurality of output transistors are coupled in parallel to the data bus.
摘要:
An ECL circuit comprising an output transistor having a high output voltage VOH guard band and a low output voltage VOL guard band with a temperature compensating network coupled to the output transistor for causing the high level output voltage VOH and low level output voltage VOL of the output transistor to remain within the maximum and minimum limits of the VOH and VOL guard bands over a wide temperature range.