Charles Plimpton
English inventor of Bayko, an early plastic construction toy.
Charles Bird Plimpton (31 October 1894 – 29 December 1948) was an English inventor and businessman. He created Bayko in 1933, a plastic construction toy for building models, and one of the first plastic toys ever sold. He founded Plimpton Engineering in Liverpool, England, to produce the toy, which was exported worldwide for more than three decades.
Plimpton was born in Peckham, London, to John Calvin Plimpton, an American, and Caroline Augusta Plimpton (née Bird). His father later moved the family to Liverpool, where he started J.C. Plimpton & Co, an import-export business for American goods. Charles attended Liverpool College, then studied engineering at the University of Birmingham from 1911, but left after two years in 1913. During World War I, he served as a wireless operator in the Royal Navy, mostly on minesweepers.
In 1922, he married Margaret Audrey; they had two daughters, Anne and Jean, and lived in Wallasey, Cheshire. In the mid-1920s, Plimpton contracted tuberculosis and spent much of the next decade in a sanatorium. During this confinement, he began designing a new construction toy. Inspired by the card-and-wood Mobaco Building Sets from the Netherlands, popular in the 1920s and 1930s, he adapted the concept to use Bakelite, a recently developed synthetic plastic and the world’s first commercial plastic.
On 20 November 1933, Plimpton filed a patent for "An Improved Constructional Building Toy," granted on 16 January 1935 as patent No. 422,645. Limited production started in late 1935, with his family helping pack sets in his kitchen. In 1934, he established Plimpton Engineering Company Limited in Liverpool, and by the end of that year, "Bayko Light Construction Sets" were in full production. The name "Bayko Light" came from "Bakelite." Over the next decade, the Bayko system was refined, and production grew as sets were exported worldwide.
In the late 1940s, Plimpton applied for a second patent, No. 613,767, titled "Improvements in Constructional Building Toys," granted on 2 December 1948. It covered new Bayko parts, but these were never manufactured. His tuberculosis returned, and he spent most of his final year in a North Wales sanatorium. He died on 29 December 1948, aged 55. Respected in the toy trade, an obituary appeared in the February 1949 issue of *Games and Toys*.
Quick Facts
- Birth Date
- 31 October 1894
- Birth Place
- Peckham, London, England
- Death Date
- 29 December 1948 · 1894 · 10 · 31
- Death Place
- Liverpool, England
- Known For
- Inventor of Bayko
- Occupation
- Toy inventor, businessman
Facts from the source article.
Lore & Background
Charles Plimpton was born in Peckham, London, to John Calvin Plimpton, an American citizen, and Caroline Augusta Plimpton. His father later moved the family to Liverpool, where he established J.C. Plimpton & Co – Import & Export American Merchants. Plimpton attended Liverpool College and studied Engineering at the University of Birmingham from 1911, but dropped out in 1913. During World War I, he enlisted as a wireless operator with the Royal Navy and served on minesweepers. In 1922 he married Margaret Audrey, with whom he had two daughters, Anne and Jean. They lived in Wallasey, then part of Cheshire. In the mid-1920s Plimpton contracted tuberculosis and spent much of the next ten years in a sanatorium. During this confinement he began working on the design of a new construction toy, adapting the card and wood Mobaco Building Sets made by Mobal in the Netherlands to use plastic pieces made from Bakelite, the world's first commercial plastic. On 20 November 1933, he applied for a patent for 'An Improved Constructional Building Toy', granted on 16 January 1935 as patent No. 422,645. Limited production began in late 1935 in his kitchen, with help from his family. In 1934 he established Plimpton Engineering Company Limited in Liverpool, and by the end of 1934 'Bayko Light Construction Sets' were in full production. The term 'Bayko Light' derived from 'Bakelite'. Over the next ten years the system was improved and exported worldwide. In the late 1940s Plimpton applied for a second patent, No. 613,767, granted on 2 December 1948, for new Bayko parts that were never manufactured. His tuberculosis resurfaced, and he spent most of his last year in a sanatorium in North Wales, dying on 29 December 1948 at age 55.
Reader's Guide
Charles Plimpton's significance lies in his creation of Bayko, one of the earliest plastic toys marketed, which pioneered the use of Bakelite in construction sets. His adaptation of the Mobaco Building Sets into a plastic system allowed for mass production and global distribution, with Bayko sold worldwide for over 30 years. The toy's longevity was sustained by Plimpton Engineering, which his wife continued running after his death until 1959, when declining market share due to competitors like Lego led to its sale to Meccano Ltd in 1960. Meccano manufactured Bayko for another seven years. Plimpton's patents, particularly the 1935 patent for the construction toy, established a foundation for plastic building systems. His obituary in the February 1949 issue of Games and Toys reflected his standing in the toy trade. The Bayko system's eventual decline illustrates the shift in the construction toy market toward interlocking brick systems, but its early adoption of plastic and its decades-long production mark it as a notable predecessor in the field.
Did You Know?
- Charles Plimpton invented Bayko in 1933 while confined to a sanatorium with tuberculosis.
- Bayko was one of the earliest plastic toys to be marketed, using Bakelite.
- The name 'Bayko Light' was derived from 'Bakelite'.
- Plimpton's wife ran Plimpton Engineering for ten years after his death, until 1959.
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