Overview
The Simplex Time Recorder Company was an American precision manufacturing and commercial electronics enterprise founded in Gardner, Massachusetts. Established in 1894 by mechanical engineer Edward Goodrich Watkins, the company began as an innovator in mechanical employee time recorders and attendance punch clocks before growing into an international leader in synchronized master clock networks, life-safety fire alarm systems, and automated building management platforms. In 1958, Simplex completed a pivotal acquisition of IBM’s Time Equipment Division, consolidating the historical manufacturing lineages of the International Time Recording Company (ITR) and Bundy Manufacturing. The corporation operated as an independent, family-led enterprise for over a century until its acquisition by Tyco International in 2001, where its engineering legacy continues under Johnson Controls.
Technical Specifications
| Attribute | Details |
| Manufacturer / Corporate Operator | Simplex Time Recorder Company (Watkins Family / Later Tyco International & Johnson Controls) |
| Associated Brands / Trademarks | Simplex, SimplexGrinnell, TrueAlarm, TrueAlert, Gledhill-Brook, W.H. Bundy |
| Country of Origin | United States |
| Years in Operation | 1894–2001 (Independent corporate operating era prior to Tyco International acquisition) |
| Core Product Categories | Mechanical Time Recorders, Master Clock Systems, Secondary Wall Clocks, Fire Alarm Control Panels, Notification Appliances |
| Specialization | Synchronized Facility Time Networks, Industrial Payroll Recorders, Commercial Fire Protection & Life-Safety Systems |
| Historical Operating Addresses | 26 South Lincoln Street, Gardner, Massachusetts 01440; Sanborn Street, Gardner, Massachusetts 01440 |
Description
Simplex Time Recorder Company engineered mechanical, electromechanical, and microprocessor-driven hardware designed to automate labor accounting, facility scheduling, and building safety. Operating extensive manufacturing plants and foundry facilities in Massachusetts, the firm structured its portfolio across several core disciplines:
- Mechanical & Electronic Time Recorders: Cylinder-drum button-press clocks, card-punch recorders, and electronic timestamp stampers designed to stamp employee shift arrivals onto cards or internal paper rolls.
- Synchronized Facility Master Clock Systems: Master time centers and mechanical/solid-state program controllers that transmitted wired or carrier-current impulses to synchronize hundreds of secondary classroom and factory clocks, class-change bells, and shift horns.
- Commercial Fire Alarm Control Systems: Hardwired conventional and addressable fire alarm control units (notably the 2001 and 4100 series) that monitored smoke sensors, manual pull stations, and waterflow switches.
- Notification & Multiplex Building Controls: Integrated multiplex communications networks (such as the 2120 system) that combined life safety, voice evacuation, HVAC control, security access, and watchman patrol monitoring into a unified digital wiring loop.
History
In 1888, Edward Goodrich Watkins, a mechanical engineering graduate of Worcester Polytechnic Institute working for the Heywood Brothers furniture manufacturing company in Gardner, Massachusetts, sought to improve factory payroll logging. Unsatisfied with existing manual ledgers, Watkins engineered a clock that utilized a revolving cylinder wrapped in a pre-printed time sheet, actuated when employees pushed a numbered key that drove a pin mechanism to perforate the sheet. Watkins received a patent for his mechanism in 1894, naming it the “Simplex” for its simplicity. Heywood Brothers initially produced the recorders, but in 1901 Watkins organized the Simplex Time Recorder Company as an independent operation, incorporating it in 1902.
Simplex steadily expanded production, moving to a dedicated three-story factory on Sanborn Street in Gardner. In 1916, the company broadened its patent holdings and manufacturing footprint by acquiring the W.H. Bundy Time Recorder Company of Syracuse, New York, relocating its tooling and personnel to Gardner. Following the death of Edward G. Watkins, his son Curtis G. Watkins took over the presidency in 1942, expanding the sales network from regional domestic outlets into global distribution branches.
In 1958, Simplex executed its most significant strategic transaction by acquiring the Time Equipment Division of International Business Machines (IBM). This acquisition transferred IBM’s payroll punch clocks, master program clocks, job recorders, and early institutional fire alarm patents to Simplex, effectively absorbing the industrial horological lineage tracing back to the International Time Recording Company (ITR) and Willard & Frick. In 1964, Simplex expanded further into Europe by purchasing British manufacturer Gledhill-Brook Time Recorders, reorganizing it as Simplex Time Recorder Company (UK) Ltd.
Under Edward G. “Chris” Watkins III, who assumed executive leadership in 1967, the company shifted substantial development resources toward commercial fire protection and life-safety electronics. As mechanical punch clocks faced increasing competition from software, Simplex’s fire alarm division expanded into an industry leader, pioneering addressable fire alarm networks, TrueAlarm analog smoke detection, and multiplexed communications platforms. In January 2001, Tyco International acquired the Simplex Time Recorder Company for $1.15 billion, merging it with Grinnell Fire Protection to create SimplexGrinnell, while divesting the legacy workforce timekeeping business to Kronos Incorporated. Following the 2016 merger of Tyco and Johnson Controls, Simplex continues to operate as an active life-safety brand within Johnson Controls’ global fire protection group.
Historical Timeline
| Year | Event |
| 1894 | Edward G. Watkins receives a patent for the Simplex cylinder mechanical time recorder. |
| 1901 | Watkins establishes the Simplex Time Recorder Company in Gardner, Massachusetts, formally incorporating in 1902. |
| 1916 | Simplex acquires the W.H. Bundy Time Recorder Company of Syracuse, New York, moving its manufacturing machinery to Gardner. |
| 1942 | Curtis G. Watkins becomes president, modernizing manufacturing and establishing nationwide direct sales offices. |
| 1958 | Simplex purchases the Time Equipment Division from IBM, absorbing its industrial timekeeping and institutional fire alarm lines. |
| 1964 | The enterprise acquires UK time recorder producer Gledhill-Brook, establishing Simplex Time Recorder Company (UK) Ltd. |
| 1967 | Edward G. Watkins III assumes leadership, initiating aggressive expansion into commercial life safety and fire alarm engineering. |
| 1979 | Simplex introduces the 2120 multiplex system, integrating fire protection, security, and synchronized time across high-rise facilities. |
| 2001 | Tyco International acquires Simplex for $1.15 billion, merging fire operations into SimplexGrinnell and divesting time systems to Kronos. |
| 2016 | Tyco merges with Johnson Controls, preserving Simplex as a premier commercial fire alarm and life-safety systems brand. |
References
- https://workclocks.co.uk/simplex/ – Technical horology archive detailing Edward G. Watkins’ inventions, the IBM Time Division acquisition, and UK subsidiary operations.
- https://pubs.nawcc.org/images/stories/414_124_128.pdf – Historical NAWCC monograph documenting the mechanical clock patents, Heywood Brothers roots, and Gardner facility expansions.
- https://www.clockguy.com/SiteRelated/SiteReferencePages/SimplexTimeRecorderCompanyHistory.html – Horological reference archive reviewing family leadership eras, the 1958 IBM divestiture, and corporate acquisitions.
- https://gardnermagazine.com/history-gardner-ma/ – Gardner regional historical archive recording the development of the Sanborn Street factory, Watkins family leadership, and local industrial impact.