Today in Wheeling History: September 6 - Peter Christian Carl Fridrichsen of Wheeling received U.S. patent number 1,390,118 for an improved electrical insulator design, featuring angled grooves for easier wire installation (1921).
Fridrichsen, a Danish immigrant living in Wheeling, West Virginia, invented a clever two-part electrical insulator. His design aimed to make wiring installation simpler and more durable.
The insulator consisted of a porcelain base and cap. The base had three wire-holding grooves arranged at 120-degree angles, with a triangular projection in the center. The cap featured a matching recess to fit over this projection.
Key improvements in Fridrichsen's design included:
1. Angled grooves allowing easy wire placement without precise adjustment.
2. Convex surfaces on both parts to prevent chipping during installation.
3. Ribbed surfaces in the grooves and on the cap to securely hold wires.
4. Limited contact points between cap and base, reducing breakage risk.
These features addressed common problems with insulators of the time, making them easier to install and less prone to damage. The design was particularly useful for the expanding electrical systems of the early 20th century.
Fridrichsen's invention shows how local innovators in places like Wheeling contributed to solving everyday challenges in America's growing infrastructure. His practical approach to insulator design helped improve the reliability and ease of installation for electrical systems in homes and buildings.
To learn more: Google Patents (https://shorturl.at/UUC7Y)
Photo credits: U.S. Patent Office
Fridrichsen, a Danish immigrant living in Wheeling, West Virginia, invented a clever two-part electrical insulator. His design aimed to make wiring installation simpler and more durable.
The insulator consisted of a porcelain base and cap. The base had three wire-holding grooves arranged at 120-degree angles, with a triangular projection in the center. The cap featured a matching recess to fit over this projection.
Key improvements in Fridrichsen's design included:
1. Angled grooves allowing easy wire placement without precise adjustment.
2. Convex surfaces on both parts to prevent chipping during installation.
3. Ribbed surfaces in the grooves and on the cap to securely hold wires.
4. Limited contact points between cap and base, reducing breakage risk.
These features addressed common problems with insulators of the time, making them easier to install and less prone to damage. The design was particularly useful for the expanding electrical systems of the early 20th century.
Fridrichsen's invention shows how local innovators in places like Wheeling contributed to solving everyday challenges in America's growing infrastructure. His practical approach to insulator design helped improve the reliability and ease of installation for electrical systems in homes and buildings.
To learn more: Google Patents (https://shorturl.at/UUC7Y)
Photo credits: U.S. Patent Office
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