Joseph Saxton's career was a testament to a lifelong dedication to precision and practical invention, spanning from his early days as a watchmaker to his significant contributions at the Philadelphia Mint. Born in 1799, Saxton's journey as an inventor began in his youth and evolved through various roles and locations, each experience building upon his innate mechanical aptitude. His work consistently demonstrated a keen eye for detail and a drive
to create instruments that served tangible, often scientific, purposes, making him a notable figure in 19th-century American innovation.
Early Foundations in Philadelphia
Saxton's inventive path began early. At the age of 18, in 1817, he moved to Philadelphia, a city that would become a recurring setting for his professional life. There, he secured employment as a watchmaker, engraver, and an apprentice in the machine shop of Isaiah Lukens. This period was foundational, allowing him to develop the intricate skills necessary for precision engineering. It was during this time that he made his first significant inventions, including a machine specifically designed for cutting the teeth of marine chronometer wheels, showcasing his early focus on accuracy in timekeeping. He also developed an escapement and a compensating pendulum for clocks, further demonstrating his expertise in horology. His talents were recognized as he assisted Lukens in constructing a clock for the newly rebuilt steeple of Independence Hall, a prominent civic project.
His early work in Philadelphia established a pattern of innovation driven by practical needs. The anecdote of him "tinkering" in Lukens' shop, even planning and making a cane gun, illustrates his hands-on approach and self-directed learning. This early environment fostered his ability to conceptualize and execute complex mechanical designs, laying the groundwork for his future achievements.
Expanding Horizons in London
Seeking to further his education and broaden his experience, Joseph Saxton embarked on a nine-year journey to London, England, in 1828. This period abroad was highly influential, exposing him to new scientific principles and inventions. For much of his stay, he was employed by the Adelaide Gallery of Practical Science, a public museum dedicated to demonstrating new scientific concepts and technological advancements. This environment was ideal for Saxton, allowing him to engage with and contribute to the cutting edge of scientific display and invention.
While working at the Adelaide Gallery, Saxton's inventive output was prolific. He developed the magneto-electric machine, a significant contribution to the understanding and application of electromagnetism. His practical focus continued with an apparatus for measuring the velocity of vessels, a device for measuring the height of water in a steam boiler, and even a riflescope. Notably, he also created a prototype for the fountain pen, demonstrating his diverse interests and ability to innovate across different fields. These inventions from his time in London highlight his continuous pursuit of practical solutions and his engagement with the scientific community.
Return to the Mint and Metrological Mastery
Upon his return to Philadelphia in 1837, Saxton accepted a position at the Philadelphia Mint, marking another pivotal phase in his career. Initially overseeing machinery production, he later became the curator of weights and measures. This role perfectly aligned with his lifelong commitment to precision, as he was responsible for providing accurate sets of standards to national and state governments. His inventions during this period further underscored his expertise in metrology. He developed a mirror comparator for comparing standards of length and a new form of dividing engine, both crucial for maintaining accuracy in measurement. Additionally, he invented a self-registering tide gauge and an immersed hydrometer, showcasing his continued ability to create instruments for diverse scientific and practical applications. Saxton's career, from his early days in Philadelphia to his influential time in London and his return to the Mint, consistently demonstrated a remarkable talent for practical invention and an unwavering dedication to precision.
