Abstract: A manual mechanism for resetting a rotatable member to its initial position is disclosed which provides for rotation of 360.degree. or more, rotates in one direction only, and can be simply locked and unlocked for periodic use. In one embodiment the resetting mechanism is applied to cumulative demand registers on watt hour meters.

Abstract: The apparatus comprises a sampling hold circuit for sampling the amplitude of a sinusoidal wave at a predetermined frequency, a data sample extracting circuit for extracting two data samples at two points immediately before and after the peak value of the sinusoidal wave, and an operation circuit responsive to the absolute values of the two data samples for calculating the amplitude value of the sinusoidal wave.

Abstract: The system controls the operation of one or more interruptable electrical loads to maintain the total electrical power demand during a demand interval within certain predetermined limits. The demand forecaster makes periodic projections of the metered demand to the end of the demand interval based upon the current rate of energy consumption (instantaneous demand) and the accumulated energy consumption during the demand interval. If the projected value indicates that a demand peak will occur, the system signals a "shed" condition for the load thereby interrupting the load to prevent the occurrence of the peak. Conversely, if the system detects a projected low value of the demand, a "restore" condition exists whereby the load is turned on to take advantage of the available electrical capacity. The system comprises a pair of loadable up/down counters, and an accumulator, which may consist of a two-port multiplexer, a full adder and associated data latch.

Abstract: A method and system for making absolute measurements of coherent rf power is described. The method surmounts the primary shortcoming of the other existing methods in that it permits absolute measurement of power at all radio frequencies, whereas the other methods are inherently frequency limited, with the current upper limit being about 75 GHz. This major advantage stems from the fact that this method utilizes a direct comparison of the unknown rf power with a primary standard, whereas all other methods require a conversion of the power to heat before making the comparison.

Abstract: A vector CRT display apparatus for faithfully reproducing an analog signal having high frequency components include an A-D converter, a digital minimum/maximum circuit and a recirculating shift register to derive from the signal, in successive sampling periods, two digital words representing, respectively, a minimum amplitude value date point and a maximum amplitude value data point of the signal. In each sampling period, the minimum/maximum circuit stores in the memory the most relevant of the minimum and maximum amplitude values and determine whether the remaining values should be held over to the next sampling period before it is stored, or can be discarded. As a result, if new minimum and new maximum amplitude values occur in the same sample period, one will be loaded into the memory and the other will be held over and loaded into the memory in the next sample period.

Abstract: In a closed loop control system for monitoring and regulating the rate of electrical power delivered to a plurality of electrical loads, an improved circuit is disclosed that is responsive to an analog input signal representing a measured power rate and has a digital pulse output for conditioning a digital switching circuit to add one or more loads when the measured power rate falls below a predetermined rate and to shed one or more loads when the measured power rate exceeds such predetermined rate. The analog input signal is compared with a reference signal to produce an analog error signal that is first compensated for certain types of power rate deviations and is then fed to an analog to digital conversion circuit which includes a threshold detection circuit and a pulse generator circuit and produces one or more output pulses in response to a predetermined threshold magnitude of the compensated error signal.

Abstract: A unidirectional drive assembly that is operable to rotate an indicating pointer in an up-scale direction responsive to rotation of an input drive gear wheel in either a forward or a reverse direction. The assembly is characterized by having an idler gear shift assembly coaxially mounted in nesting relationship with a ratio gear assembly in a compact arrangement between supporting members of a frame assembly, in combination with a register indicator gear assembly and an idler gear rotatably mounted in continuous meshing engagement with a gear in the register indicator gear assembly. The idler gear shift assembly is operable to selectively move either a first or a second idler gear into meshing engagement respectively with either the gear on the register indicator gear assembly or with the idler gear continuously meshed therewith.