International Medical Electronics Ltd.

Other

Kustom Electronics, Inc.

The Kansas City Southern Railway Company

Fred M Berry

John L Aker

Richard H Selinfreund

Rudolph D Spigarelli

Freddie R Kittle

James N Shirley

Donald L Geist

Leonard L Perlmutter

A method and apparatus for remotely controlling access to the components of an optically interconnected information processing infrastructure is presented. Access to the infrastructure is controlled independently of the infrastructure operating system.

Remote circuit locking switch system

Diathermy applicator head

An electronic control system for automatically controlling the locomotive units of a multiple unit locomotive consist in a manner to maintain a selected speed of the consist with minimum fuel consumption. The control system includes a microprocessor and related hardware for each unit in the consist. Control and acknowledgement signals are transmitted among the locomotive units along a single train line wire to vary the output power of each unit among full power, half power and idle speed settings while maintaining the consist at the desired set speed. The hardware is arranged to direct the control and acknowledgement signals to the proper locomotive units while transmitting in both directions along the train line wire. The software for the microprocessors takes into account the acceleration and deceleration of the consist in adjusting the power output of the locomotive units.

Control device for multiple unit locomotive systems

A moving doppler radar unit capable of separating the incoming doppler signal into its respective frequency components by means of frequency translation techniques and fixed frequency filters is disclosed. When the radar platform vehicle and target vehicle are both moving, the received doppler signal is a complex wave having frequency components related to the ground speed of the platform vehicle and the relative speed of the platform and target vehicles with respect to each other. Separation of the received doppler signal into its respective frequency components is accomplished by frequency translating the received doppler signal to a preselected reference frequency, discriminating between the frequency translated platform speed and target speed frequency components by means of a narrow band filter and a band pass filter, and frequency translating the separated frequency components downward to provide speed signals representative of the ground speed of the radar platform vehicle and the ground speed of the target vehicle. These speed signals are then converted into digital speed information which can be conventionally displayed. A lock detection circuit is included to inhibit the speed computation if the received doppler signal is not properly frequency translated to the reference frequency.

Method and apparatus for digitally determining the speed of a target

This invention deals with an improved electrostatic shield which is adapted to be mounted on the applicator of a conventional diathermy apparatus between the radiating electrode thereof and the patient receiving treatment. The shield is comprised of a first and a second plurality of electrically conductive strips which form the body portion of the shield and which encircle the current carrying coil of the radiating electrode. The strips likewise form the face portion of the shield and define a plane which is generally parallel to the plane formed by the current carrying coil. Each strip of the face portion is preferably coupled with one of the strips of the body portion. However, the face portion strips of the shield extend generally radially inward from the outer periphery of the surface defined by the face of the shield. These strips then terminate within the inner portion of the area defined by the shield such that the terminating end of the strips are electrically insulated from each other. A loop is provided to surround and electrically couple each of the strips of the body portion of the shield. In this configuration, the strips comprise an electrostatic shield which will impede electrostatic field radiated by the current carrying coil located within the applicator head. The shield, however, allows passage of the radiated electromagnetic field in a relatively unimpeded fashion.

Electrostatic shield for diathermy treatment head

This invention discloses a method and apparatus for accurately measuring and controlling the amount of power being absorbed by a load within the irradiating region of a diathermy applicator head. A desired power setting is initially preset into the diathermy apparatus. Thereafter, the diathermy apparatus is keyed on for a predetermined duty cycle causing RF energy to be generated within the applicator head during this time period. The level of power being absorbed by the load is then ascertained by measuring voltage and current flow in the head during the duty cycle. In the preferred embodiment of the invention, the electrostatic energy generated in the applicator head is attenuated by an electrostatic shield. Attenuation of the electrostatic energy improves the stability of the diathermy apparatus by significantly reducing electrostatic coupling between the applicator head and its attendant load. Once the electrostatic field is eliminated, the level of power being applied to the applicator head accurately represents the level of power being absorbed by the load within the irradiating region of the head. The diathermy apparatus is also provided with circuitry for keeping the applicator head in electrical resonance thereby improving the power measurement by ensuring that the voltage and current are locked in phase. The measured level of power is then multiplied by the duration of the duty cycle to provide a figure representative of the total amount of power being absorbed by the load. This figure is compared with the preset level and the duty cycle is adjusted accordingly.

Method and apparatus for measuring and controlling the output power of a

Method and apparatus for minimizing or preventing the deleterious skin heating effects associated with conventional short wave diathermy treatment. The disclosed method includes attenuation of the electrostatic field transmitted by the applicator head and transcutaneous transmission of the radiated electromagnetic energy substantially unimpeded to the deep body tissues to be treated. The attenuation of the electrostatic field is performed by an electrostatic shield, which is adapted to be positioned on the diathermy applicator head between the radiating electrode and the patient receiving treatment. However, the radiated electromagnetic field, which is primarily responsible for the therapeutic generation of heat in relatively deep body tissues, passes through the shield substantially unimpeded. The shield comprises a plurality of narrow, preferably metallic, spaced apart strips and an electrically conductive loop which surrounds the strips and is coplanar therewith. Each of the strips are oriented generally perpendicular with respect to both the current carrying coils in the applicator head (on which the shield is mounted) and the loop. The strips extend generally radially outwardly from the loop center area toward the loop, to which each of the strips is electrically connected. So positioned, the strips impede electrostatic field radiation while facilitating passage of the electromagnetic field. The loop further reduces electrostatic field radiation by discouraging fringing effects, but its radius is sufficiently large to prevent interference with the radiated magnetic field.

A burner igniting and sustaining arrangement includes a spark plug positioned adjacent the fuel discharge and which is caused to produce a rapidly repeating ignition spark through a circuit responding to a low voltage alternating current source by feeding an ignition coil connected to the spark plug.

Burner ignitor arrangement

A digital display doppler radar unit has a moving mode and a stationary mode. The incoming doppler signal, which in the moving mode, represents both speed of the radar platform and speed of an approaching target vehicle, is separated into two signal components by selective filtering. One component represents the sum of the ground speeds for the radar platform and approaching vehicles. A time base is generated by a crystal control means and the time base is utilized for correlating the received doppler signals, indicative of speed, with the time base. Each doppler signal component is converted to binary coded decimal (BCD) information and a digital counter counts the cycles of each reeived doppler signal and compares the count with an amount previously stored. Circuit means are provided to validate the received doppler signal, allowing their continual processing only after a preselected number of valid comparisons are made. The radar signal component representing the ground speed sum for the radar platform and the approaching target vehicle, and the component representing radar platform speed are combined. The radar platform speed is subtracted from the combined component, resulting in a digital count representing approaching target vehicle speed. In the stationary mode, there is no radar platform doppler pulses in the radar return and consequently, the returning pulses may be processed directly and no subtracting function is performed. Speeds corresponding to the valid received doppler signals are suitably displayed to indicate a speeding violation.

Growing community of inventors

Leawood, KS, United States of America

Fred M Berry