Abstract: A power control system for automatically and proportionately metering power to a heating device used to create a warm microenvironment conducive to the health and growth of an animal during a predetermined incubation period is herein disclosed. The power control system transmits proportionally more power to a heating device where an ambient room temperature measured outside of the microenvironment is nearer a predetermined lower limit, and proportionately less power when the ambient room temperature measured outside of the microenvironment is nearer a predetermined upper limit. A method of providing a heated microenvironment within a larger environment also is disclosed.

Abstract: A power control device for automatically and proportionately metering power to a heating device used to create a warm microenvironment conducive to the health and growth of an animal during a predetermined incubation period is herein disclosed. The power control device transmits proportionally more power to a heating device where an ambient temperature measured outside of the microenvironment is nearer a predetermined lower limit, and proportionately less power when the ambient room temperature measured outside of the microenvironment is nearer a predetermined upper limit.

Abstract: A power control device for automatically and proportionately metering power to a heating device used to create a warm microenvironment conducive to the health and growth of an animal during a predetermined incubation period is herein disclosed. The power control device transmits proportionally more power to a heating device where an ambient temperature measured outside of the microenvironment is nearer a predetermined lower limit, and proportionately less power when the ambient room temperature measured outside of the microenvironment is nearer a predetermined upper limit.

Abstract: The present invention relates to a control system for establishing and maintaining a desired uniform temperature in a room heated by a heating device. The control system includes a valve assembly for controlling the pressure of the fluid supplied to the heating device, the valve assembly including a valve actuator, a pressure sensor sensing the pressure of the fluid supplied to the heater, and a temperature control device to sense the ambient temperature of the room.

Abstract: The present invention relates to a control system for establishing and maintaining a desired uniform temperature in a room heated by a heating device. The control system includes a valve assembly for controlling the pressure of the fluid supplied to the heating device, the valve assembly including a valve actuator, a pressure sensor sensing the pressure of the fluid supplied to the heater, and a temperature control device to sense the ambient temperature of the room.

Abstract: A multi-load cell force sensing apparatus includes a plurality of load cells supporting an operating surface and a controller which determines the position, as well as the magnitude, of an applied force relative to the operating surface. Impulse forces may be distinguished from static forces, thereby enabling the apparatus to function as a user input device whereby a user may request the apparatus to perform functions by pressing or touching a specified location on the operating surface.

Abstract: A digital hysteresis circuit which generates delayed, clock-synchronous output pulses from input pulses having a random timing relationship with the clock. Input pulses slewing generally in or out on a repetitive clock defined time base may back up from the direction they are slewing by a predetermined time interval without changing the time position of the clock-synchronous, time-delayed output pulses which they successively generate. The circuit is useful in reducing jitter in the read-out of a digital counter while the counter is operating by preventing a load command pulse occurring at counter transition time from effecting a read-out at that instant, and further effective in reducing jitter in the commanded read out from a digital counter where system uncertainty might otherwise cause shift of successive input commands from their normally predictable time positions.