Intermatic

Industry	Electrical equipment
Predecessor	International Register Company
Founded	1891; 134 years ago in Chicago, Illinois, USA
Founder	Arthur Woodward
Headquarters	Spring Grove, Illinois, USA
Owner	MPE Partners
Number of employees	250 to 1000 (2022)
Website	intermatic.com
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Intermatic Inc. is an American manufacturer of time switches based in Spring Grove, Illinois.

History

Intermatic Incorporated was founded in 1891 in Chicago, Illinois as the International Register Company to produce fare registers.^[2] Its founder was A.H. Woodward who held several patents on fare registers (mechanical devices for recording passenger ticket and ridership).^[3]^[4]

It introduced its first lighting timer in 1945, and today makes timing and control systems for line and low voltage systems used in residential, commercial, government, and industrial systems.^[5]

The company sells the Time-All line of timers for consumer applications.^[6]^[7]

On April 23, 2025, MPE Partners announced that it had acquired the company.^[8]

References

^ "Intermatic Incorporated". www.idaillinois.org. State of Illinois. Retrieved 22 August 2022.
^ "Intermatic Incorporated". www.idaillinois.org. Illinois Digital Archives, State of Illinois. Retrieved 22 August 2022.
^ Woodward, Arthur H. (7 November 1905). "Bell mechanism for registers". Retrieved 4 October 2022.
^ Woodward, Arthur H. (24 April 1906). "Fare-register". Retrieved 4 October 2022.
^ "Intermatic Inc - Company Profile and News". Bloomberg.com. Retrieved 22 August 2022.
^ "Word Mark TIME-ALL". tmsearch.uspto.gov. United States Patent & Trademark Office. Retrieved 22 August 2022.
^ "New timers with 'smart' electronics". The New York Times. 11 November 1986. p. 68. Retrieved 22 August 2022. For example, the Time-All Programmer from Intermatic Inc.
^ "MPE Partners Completes Acquisition of Intermatic". Intermatic. Retrieved 2025-09-13.

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[1] "Intermatic Incorporated". www.idaillinois.org. State of Illinois. Retrieved 22 August 2022.

[IDA-IL.US-2] "Intermatic Incorporated". www.idaillinois.org. Illinois Digital Archives, State of Illinois. Retrieved 22 August 2022.

[U.S._Patent_803655A-3] Woodward, Arthur H. (7 November 1905). "Bell mechanism for registers". Retrieved 4 October 2022.

[U.S._Patent_818508-4] Woodward, Arthur H. (24 April 1906). "Fare-register". Retrieved 4 October 2022.

[Bloomberg-5] "Intermatic Inc - Company Profile and News". Bloomberg.com. Retrieved 22 August 2022.

[USPTO-Time-All-6] "Word Mark TIME-ALL". tmsearch.uspto.gov. United States Patent & Trademark Office. Retrieved 22 August 2022.

[7] "New timers with 'smart' electronics". The New York Times. 11 November 1986. p. 68. Retrieved 22 August 2022. For example, the Time-All Programmer from Intermatic Inc.

[8] "MPE Partners Completes Acquisition of Intermatic". Intermatic. Retrieved 2025-09-13.

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