Company Filing History:
3 out of 901 
1 out of 832,891 Years Active: 1987-2000
Title: Lester B Postlewait: Innovator in Soldering Technology
Introduction
Lester B Postlewait is a notable inventor based in Cheraw, South Carolina, with a total of four patents to his name. His work primarily focuses on advancements in soldering technology and resistance measurement in high-temperature environments.
Latest Patents
One of his latest patents is for a magnet and reed switch/lock system. This invention outlines a soldering wand control system that features a wand with a heated tip, a heater element, and a thermostat for measuring tip temperature. The system provides an output signal of the tip temperature, which is transmitted to a CPU along with a set point temperature using an analog to digital converter. The CPU connects with a binary switch, which is toggled to input an operator-generated signal for changing the tip temperature. In this design, the binary switch is a reed switch that is easily operated by a magnet moved by the operator. This innovative approach allows for simple input of a binary signal to modify the circuit and its operation.
Another significant patent involves a circuit and method for measuring resistance in an active and high-temperature environment. This invention utilizes a low-frequency square wave as an input, which is fed through the unit under test into a full-wave rectifier and RMS circuit. The full-wave rectifier and averaging circuit effectively cancel out errors caused by the Seebeck effect and noise. The resulting direct current signal is proportional to the resistance of the unit under test and can be displayed accurately.
Career Highlights
Throughout his career, Lester has worked with various companies, including Cooper Industries, Inc. His contributions to the field of soldering technology and resistance measurement have made a significant impact on the industry.
Collaborations
Lester has collaborated with notable individuals such as Paul L Urban and Jack L Wilhelmson, further enhancing his innovative work in the field.
Conclusion
Lester B Postlewait is a distinguished inventor whose contributions to soldering technology and resistance measurement have paved the way for advancements in these areas. His innovative patents reflect his commitment to improving technology and efficiency in high-temperature environments.