Location History:
- Seattle, WA (US) (1978)
- Newberg, OR (US) (1983)
Company Filing History:
Years Active: 1978-1983
Title: The Innovations of Darrell D. Cole
Introduction
Darrell D. Cole is an accomplished inventor based in Seattle, WA. He has made significant contributions to the field of telecommunications, holding a total of 4 patents. His work focuses on enhancing the functionality and efficiency of telephone systems.
Latest Patents
One of Cole's latest patents is for an electronic telephone ringer that includes anti-bell tap provisions. This innovative ringer circuit serves as a replacement for traditional electromagnetic ringers in telephone sets. The design eliminates bell tap by utilizing a load impedance connected across the output terminals of a rectifier-power supply stage until an acceptable ringing signal is detected. Once detected, the load impedance is disconnected, allowing the rectifier-power supply stage to activate a tone generator that drives a piezoelectric transducer. This invention includes various configurations for single-party bridged ringing installations, multi-party divided ringing installations, coded ringing for environments with multiple stations, and multi-line installations such as small key telephone systems.
Another notable patent by Cole is a telephone line lifting apparatus. This device connects and disconnects a customer station from a telephone line extending from a central office for line testing purposes. The apparatus employs a bistable latching relay controlled by a circuit responsive to potentials on the telephone line conductors. The control circuit ensures that the telephone line can be disconnected or connected based on the applied potentials, facilitating efficient line testing.
Career Highlights
Darrell D. Cole is associated with Proctor & Associates Company, Inc., where he continues to innovate in the telecommunications sector. His work has significantly impacted the design and functionality of telephone systems, making them more reliable and efficient.
Collaborations
Throughout his career, Cole has collaborated with notable individuals such as D. Frederic Proctor and Darryl F. Proctor. These collaborations have contributed to the development of advanced telecommunications technologies.
Conclusion
Darrell D. Cole's contributions to telecommunications through his innovative patents demonstrate his expertise and commitment to improving communication technologies. His work continues to influence the industry and enhance user experiences.