Engineering topics
Publications and source records attributed to Lonborg, J. O..
Booklet discusses damage to electronic components caused by electrostatic discharges during assembly. Describes procedure for setting up static-free workplace for handling and assembling electronic components.
Tiltmeter indicates sense and magnitude of slope used in locations where incline not visible to operator. Use of direct rather than alternating current greatly simplifies design of instrument capable of indicating sense of slope.
Test apparatus checks ion content of airstream from commercial air ionizer. Apparatus ensures ion output is sufficient to neutralize static charges in electronic assembly areas and concentrations of positive and negative ions are balanced.
Length and timing of pulse sequences user controlled. Digital circuit generates several pulse streams to control loads that must be synchronized allowing duration and phasing of each stream to be varied independently. Application of circuit to control pump for biomedical applications.
Instrument automatically tests each wire in multiwire cable and identifies specified wire to be segregated or labeled and locates wire connected to specified connector pin. Instrument made with readily available CMOS integrated circuits. More efficient and reliable than conventional continuity testers and less expensive than computer controlled units.
Buzzer indicates very high or very low resistance between probes. Instrument checks for either continuity or isolation between two points in electrical circuit.
New wire stripper removes insulation from cable with noncircular cross sections as well as circular cross sections.
Three-point automatically released suspension and jettisoning system operates independently of lander's power system and releases parachute on touchdown. The system is based on a ball-lock device operated by the shock of the parachute's opening and by the subsequent decay in the load on the main cord.
Thermoelectric outer planet spacecraft /TOPS/ structural problems associated with high gain antenna and electronic equipment
Attitude control system for spacecraft based on conversion of incident solar radiation on movable control surfaces into mechanical torques
Three-part signal electrode provides capacitive feedback to an oscillator driven dynamic capacitor in an electrometer circuit.
The amount of solar radiation incident on a specially prepared bimetallic strip is simply and reliably controlled by a light valve. This device is valuable for systems requiring temperature regulation.
Electronic equipment design and packaging with capability of surviving hard impacts in unmanned lunar and planetary landings
Design and operation of slingshot shock testing machine for small specimens for accelerations to 40000-g and impact velocities to 200-fps
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Shock tester capable of subjecting small specimans to accelerations up to 40,000 g, with impact velocities to 200 fds