Okay, you believed ‘cops’ that isn’t a word we usually use here in the UK. We Brits traditionally tend to refer, graciously, to our ‘boys in blue’ as ‘bobbies’ or ‘the old bill’.
In any case, given that, I’m likely to guess that you’re wondering regarding the US police force and their longstanding joint venture with the Motorola Corporation. OK, here goes…
Reported by Motorola’s official site,
“Law enforcement communications and police communications are essential assets to the safety and security initiatives in any community. Advancing police communications allow law enforcement to be more mobile and more rapidly respond to issues. Motorola offers an extensive product line to enhance law enforcement communications with less paperwork and faster, highly reliable performance”.
Motorola built car radios as early on as the 1920’s and United states police and the fire brigade had some of these, however it wasn’t until 1930 that the first police force car radio was developed and developed by Motorola. According to the official website,
“Sales of Motorola police radios began in November 1930. Among the first customers (all in the U.S. state of Illinois) were the Village of River Forest; Village of Bellwood Police Department; City of Evanston Police; Illinois State Highway Police; and Cook County Police in the Chicago area. As more police departments used radios, challenges emerged. Rough roads, engine noises, interference, high power consumption, and frequency instability led Paul Galvin to recognize that police departments needed a radio specifically engineered for patrol cars”.
In 1936, the Motorola Police Cruiser Radio was manufactured. It had been a hit and Motorola are a trusted brand by US Police ever since. In 1939, engineer Don Mitchell produced the Cell T6920 AM Transmitter. It was another success, becoming a commonsense choice for the police as,
“This complete Motorola two-way radio system was priced about one-fourth as much as the competition’s, and the transmitters could be installed in cars that already had receivers in the same frequency band. In 1940 the Police Department in Bowling Green, Kentucky, became the first customer for a complete Motorola AM two-way radio system. The radios were so well-designed that Galvin Manufacturing produced the same models for several years, until FM technology replaced them in the 1940s”.
Noticeably, the US law enforcement have a very extensive and rewarding connection with the Motorola Company. This evidently applies to walkie-talkies also. It makes good sense to use a trusted, easy to implement brand for successive decades of officers, who often have to respond swiftly and impulsively to various troubles.
The initial police to use two way radios were actually Australian, but following the Second World War, mobile radios became standard issue in most 1st world countries.