Abstract: A room thermostatic control providing for automatic power defer, i.e. modification of load consumption of electrically energized heating and cooling systems during intervals when there is a peak load demand on the electrical supply system. During power defer ambient indoor temperature is controlled by set point adjustment to minimize discomfort, e.g. by pre-boosting, by ramped temperature deferral at controlled rates, and thereafter by ramped recovery at controlled rates to the reference, i.e. desired, temperature. The preferred embodiment has normal and night set back reference temperature potentiometers and ambient indoor temperature sensing circuits providing, respectively, analog reference and analog indoor signals. Digital set point signals are derived and compared with the analog indoor signal to actuate relays controlling operation of the heating and cooling means, e.g. compressor and auxiliary resistance heating. A circuit sensing external conditions, e.g.
Abstract: A high accuracy control system for driving a motor to move a member. The control system includes feedback means for generating a cyclical signal for providing an indication of the actual position of the member. The accuracy of the feedback means is maximized by introducing a gear mechanism between the motor output and the feedback means. Further provided are means for generating command pulses, each of which is indicative of an increment of commanded or desired movement of the member, and means for generating a command signal indicative of the desired commanded movement of the member. In one mode of operation, the incremental command pulses are multiplied by a factor of K to change the command signal by K increments for each incremental command pulse. In another mode of operation, M number of incremental command pulses are converted to a single incremental pulse, and this single incremental pulse is used to change the command signal by one increment of movement for M number of incremental command pulses.
Abstract: An improved push button assembly including means for facilitating the mounting of the push button assembly to a mounting panel through an opening therein and from the front side thereof. The mounting means is comprised of first and second substantially flat resilient members. Each member has one end thereof fixed to respective opposite sides of the push button housing and another end thereof extending toward the front of the push button and biased away from the plane of the respective adjacent side of the housing. Each of the first and second members has a plurality of fingers forming the other end, wherein the plurality of fingers include a pair of end fingers and additional fingers intermediate the end fingers.
Abstract: In an adaptive type of control for precipitators, the current reference ramp signal is compared with a precipitator current signal to produce a phase reference signal which is combined with sawtooth waves to produce a first train of pulses. In a spark detector, signals proportional to electrode potential are differentiated, and the differentiated output is integrated. The integrator output, if in excess of a reference potential, triggers a spark pulse of predetermined width and amplitude. The spark pulse, in addition to causing a predetermined small set back of the ramp signal, is integrated to produce a turn-off and recovery signal having a rapid excursion and subsequent slower return excursion of adjustable slope. The latter signal is combined with the sawtooth waves to produce a second train of pulses commencing after a predetermined turn-off interval and increasing in width at a predetermined recovery rate.
Abstract: A gas monitor for monitoring the concentration of particular atmospheric constituent includes a sensor and a signal processor that provides concentration-indicating output signals in response to successive samples admitted to the sensor. The processor multiplies the sensor signals by a calibration signal. It automatically recalibrates the monitor by periodically causing a sample having a standard concentration to be admitted to the sensor and adjusting the calibration signal to provide a corresponding predetermined output signal level.
Abstract: An arrangement for improving the transfer of heat from a heat source to a heat sink. The improvement is provided by the use of a malleable dimpled wafer which is deformed between the heat source and heat sink so as to improve the direct contacting of the juxtaposed adjacent surfaces of the heat source and heat sink, thereby resulting in improved thermal conductivity therebetween.
Abstract: A frequency transducer circuit for providing a precisely adjusted range of output currents characterized by the combination of a diode pump circuit with a low impedance input circuit including a control transistor with a first variable impedance for determining the upper limit of the output range, and a biasing circuit with a second variable impedance for adjusting the lower limit of the output range.Calibration of the output current range is facilitated in one preferred embodiment of the invention by eliminating interaction between the upper and lower range limit adjustments.
Abstract: A circuit disposed between a power supply and a load for detecting the flow of an excess of power from the load back through the supply. The circuit is comprised of means for sensing the instantaneous current flowing between the power supply and the load, and means for sensing the instantaneous output voltage from the power supply. The circuit is further comprised of means responsive to the sensed instantaneous voltage and current for generating a signal that is indicative of instantaneous power flowing between the power supply and the load. Means is also provided for filtering out those components of the signal indicative of the instantaneous power which are at a frequency higher than the frequency of the AC current flowing between the power supply and the load to obtain a signal having a magnitude indicative of the average power flowing therebetween.
December 28, 1976
Date of Patent:
July 11, 1978
General Electric Company
Thomas E. Anderson, Steven C. Peak, Ole N. Ibsen
Abstract: This trip device comprises a permanent magnet of cobalt-rare earth material and a plunger which is normally held in a withdrawn position by the permanent magnet. A tripping coil surrounds the plunger and, upon energization, develops tripping flux that opposes the holding flux from the permanent magnet, thereby to effect release of the plunger. In a position between the tripping coil and the permanent magnet, flux-diverting structure of highly permeable magnetic material is provided for shunting a portion of the tripping flux through a shunt path bypassing the permanent magnet. This shunt path contains a relatively large non-magnetic gap for limiting the tripping flux through the shunt path sufficiently to cause 30 percent or more of the tripping flux to pass through the permanent magnet in a direction opposite to the direction of the holding flux.
Abstract: An improved digital differential analyzer (DDA) circuit wherein the output pulses, representing incremental changes of an integral, are generated at a rate as determined by a remainder size number. An integrand counter responds to pulses representing an incremental change of the integrand to keep track of the correct value of the integrand. Upon the occurrance of a pulse representing an incremental change of the variable of integration the present value of the integrand is added to the number stored in a remainder register thereby generating a new remainder number. The new remainder number is compared to the programmed remainder size number and if the new remainder is equal to or greater than the remainder size number a pulse representing an incremental change of the integral is generated and the new remainder is modified by subtracting the remainder size number from the new remainder number.