Self Winding Clock Company

The Self Winding Clock Company (SWCC) was an American manufacturer of electromechanical clocks that operated from the late nineteenth century until approximately 1970. Its defining technology replaced manual winding with a small electric motor that periodically rewound a conventional clock mainspring. This made it possible to operate clocks continuously in commercial, institutional, transportation, and public environments while reducing the need for routine maintenance visits. The company grew out of the experimental work of Chester Henry Pond, an instrument maker and early electrical pioneer who was also associated with the Gamewell Fire Alarm-Telegraph Company. Pond patented a self-winding mechanism in 1884. The system used an electric motor to rewind the mainspring after the clock had operated for roughly an hour. A switching arrangement mounted on the clock's center shaft activated the motor, generally using battery power. The batteries could last about a year under normal operating conditions. In 1886, Pond patented an additional correction mechanism that could move the hands to the correct hour when the clock received a time signal over a telegraph line. SWCC began operations in Brooklyn, New York, in buildings associated with Charles Pratt and located at 205 Willoughby Avenue, across from the Pratt Institute. The company initially adapted movements made by established clock manufacturers, principally Seth Thomas Clock Company and, for higher-grade installations, E. Howard & Co. By about 1892, SWCC was apparently producing movements marked with its own name. It fitted these movements with its electrical winding and, where required, synchronization equipment, then installed them in cases supplied in a wide range of decorative and architectural styles. The company's business was centered less on individual household clocks than on synchronized time systems. A typical installation consisted of a master clock controlling numerous electrically connected slave clocks. Customers included businesses, factories, banks, schools, universities, railroads, telephone facilities, and other large organizations. SWCC also supplied distinctive architectural installations, including systems associated with Grand Central Terminal and the Metropolitan Life Insurance Company Tower. Its clocks were used in the London Underground as well; that installation began in 1905 and eventually included approximately 600 clocks. A major part of SWCC's commercial model was its relationship with Western Union. Under an agreement dating from June 1889, Western Union transmitted time signals over its telegraph network to synchronize SWCC clocks. Western Union installed and maintained clocks at customer premises, while SWCC received a share of the rental revenue and supplied replacement movements when major repairs were required. The arrangement made accurate standardized time available across large buildings and distributed facilities before modern electronic timekeeping became commonplace. SWCC's movement designs evolved in response to the reliability problems associated with the small winding motor. After a series of early designs, the company introduced the F movement, also called the Vibrator movement, around 1898. Instead of relying on a rotary motor added beneath the works, this design integrated a more reliable vibrating motor into the movement. With modifications, the F movement remained in production for more than six decades. SWCC used ascending serial numbers for inventory, although replacement practices mean that a movement's serial number does not necessarily date the clock case or identify its original installation. The Western Union relationship ended in 1963 as part of a lawsuit settlement under which Western Union purchased SWCC's rental clocks. By the late 1960s, the time-service business had become uneconomic as newer technologies reduced demand for electromechanical synchronized systems. The company ceased meaningful operations around 1970. Its surviving clocks, movements, master-clock equipment, and architectural installations are now of interest primarily to horologists, collectors, industrial historians, and institutions preserving historic buildings.

The Self Winding Clock Company emerged from late-nineteenth-century experimentation with electricity, precision instruments, and standardized time. Chester Henry Pond developed a mechanism that combined a conventional clock train with a small electric motor. His 1884 patent described a system in which the motor periodically rewound the mainspring, allowing the clock to run without manual winding. Pond later patented a correction device that could adjust the hands in response to an hourly telegraph time signal. The company began commercial activity in 1886 in Brooklyn, New York. Its original premises at 205 Willoughby Avenue were associated with Charles Pratt and stood near the Pratt Institute. Early SWCC clocks commonly used movements manufactured by Seth Thomas Clock Company or E. Howard & Co.; SWCC added the electrical winding apparatus and, when specified, the synchronization mechanism. By roughly 1892, the company was producing movements bearing its own identification. SWCC's principal market was institutional timekeeping. Rather than selling only standalone clocks, it designed and installed systems in which a master clock controlled many electrically connected clocks. These systems were used in factories, offices, banks, schools, universities, railroad facilities, telephone operations, and major public buildings. The company also produced cases and clock designs intended to suit different architectural settings, including elaborate custom installations. A key commercial development was the agreement with Western Union in June 1889. Western Union used its telegraph network to distribute time signals, installed SWCC clocks for customers, and handled local maintenance. SWCC received a portion of the rental income and supplied replacement movements when a clock required substantial repair. This arrangement linked SWCC's hardware to a broader time-distribution service and helped establish synchronized clocks as a practical business utility. The winding mechanism was repeatedly revised because the motor was the component most vulnerable to failure. The F movement, introduced around 1898, integrated a vibrating motor into the movement rather than attaching a rotary mechanism below it. The design was substantially more dependable and remained in use, with modifications, for over sixty years. SWCC movement serial numbers were assigned sequentially for inventory purposes, but movements were often exchanged rather than repaired and returned, making serial-based dating approximate. The company supplied major time systems at locations including Grand Central Terminal and the Metropolitan Life Insurance Company Tower. The latter included separate master-clock functions for the tower's exterior clocks, bells, and lighting, as well as a system controlling 184 clocks inside the building. SWCC equipment was also installed in the London Underground beginning in 1905, eventually serving about 600 clocks. The Western Union partnership ended in 1963 through a lawsuit settlement that transferred the rental clock inventory to Western Union. By the late 1960s, the economics of the time-service business had deteriorated. Electromechanical clock networks were increasingly superseded by newer forms of time distribution and electronic timekeeping. SWCC's operations ended around 1970, leaving surviving movements, master clocks, synchronized installations, and architectural clocks as important examples of industrial horology.

• 1970

  Operations end

  [1]Self Winding Clock Companyen.wikipedia.org

  The company ceased operations at approximately this time after its electromechanical time-service business became unprofitable.

• 1963

  Western Union acquires rental clocks

  [1]Self Winding Clock Companyen.wikipedia.org

  A lawsuit settlement ended the companies' time-service relationship and transferred SWCC's rental-clock inventory to Western Union.

• 1905

  London Underground installation begins

  [1]Self Winding Clock Companyen.wikipedia.org

  SWCC synchronized-clock installations began in the London Underground and eventually expanded to approximately 600 clocks.

• 1898

  F or Vibrator movement introduced

  [1]Self Winding Clock Companyen.wikipedia.org

  SWCC introduced its more reliable integrated vibrating winding motor design, which remained in production with modifications for more than sixty years.

• 1892

  Company-marked movements appear

  [1]Self Winding Clock Companyen.wikipedia.org

  By approximately this year, SWCC appears to have been manufacturing movements marked with its own name rather than relying exclusively on outside makers.

• 1889

  Western Union time-signal agreement

  [1]Self Winding Clock Companyen.wikipedia.org

  SWCC and Western Union established an arrangement for transmitting time signals and operating rented synchronized clocks.

• 1886

  Company begins operations

  [1]Self Winding Clock Companyen.wikipedia.org

  The Self Winding Clock Company began business in Brooklyn and Pond patented a telegraph-controlled hourly correction device.

• 1884

  Self-winding mechanism patented

  [1]Self Winding Clock Companyen.wikipedia.org

  Chester Henry Pond patented a mechanism using a small electric motor to rewind a clock's mainspring periodically.

A specialist industrial timekeeping manufacturer focused on reliable electrically wound clocks and networked synchronization systems for commercial, institutional, transportation, and architectural customers.

• Commercial clocks · 1886

  Self-winding electromechanical clocks

  SWCC clocks used a small battery-powered motor to rewind the mainspring automatically, generally after approximately one hour of running. This allowed clocks to operate continuously without daily manual winding. The mechanism was designed for institutional and commercial use, where reliable operation and reduced maintenance were more important than portability.

• Clock movement · 1898

  F or Vibrator movement

  Introduced around 1898, the F movement integrated a vibrating winding motor into the clock movement. It replaced earlier arrangements in which a motor was attached below the clock works and was intended to improve reliability, the principal technical challenge in an electrically wound clock. The design remained in production, with minor changes, for more than sixty years.

• Timekeeping system · 1889

  Synchronized master-and-slave clock systems

  These installations used a master clock to control multiple electrically connected clocks throughout a building or site. SWCC systems served businesses, factories, banks, schools, universities, railroads, telephone facilities, and public buildings. Some systems incorporated telegraph-delivered time signals so that the network could be corrected to a standardized reference.

• Public and architectural clocks

  Architectural clock installations

  The company supplied decorative and custom-built clocks for prominent architectural settings. Notable systems included installations associated with Grand Central Terminal and the Metropolitan Life Insurance Company Tower, where clock mechanisms were integrated with broader building-wide time, bell, and lighting functions.

• 1963

  Settle Western Union dispute and transfer rental-clock inventoryM&A

  Background

  SWCC's long-running arrangement with Western Union covered the transmission of time signals, installation, maintenance, and rental of synchronized clocks. The relationship ended through a lawsuit settlement.

  Action taken

  Western Union purchased all of the clocks that had been rented through the service arrangement.

  Aftermath

  The settlement ended a central distribution and service channel for SWCC. By the late 1960s, the broader time-service business was no longer profitable, and most clocks were eventually abandoned.

  Source

1. 1Self Winding Clock Companyen.wikipedia.org