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Early digital clock made in Hull shed sold at auction

Thomas Bromley's digital clock
Image caption Thomas Bromley’s Digitron Electric Clock was built in his shed at his Hull home in 1961

One of the world’s first digital clocks, which was made by a man in his shed, has been sold at auction.

Thomas Bromley, an engineer and amateur inventor, created his Digitron Electric Clock in 1961 at his home in Hull.

He patented the design for three years but chose not to renew it – potentially costing him millions of pounds.

The prototype sold for £460 to a UK buyer, more than the £400 it was expected to fetch, when it went under the hammer in Beverley, East Yorkshire.

Image copyright Bromley family
Image caption Bromley, who died in 1990, was an electrical engineer by day and an inventor by night

Auctioneer John Hawley said Bromley had received an award at the Salon des Inventors in Brussels in 1964 for his prototype and would have been a multimillionaire had he renewed his patent.

A year after his patent ran out, the Japanese started manufacturing “virtually an identical clock and sold it in many thousands”, he said.

‘Mad professor’

Bromley’s son, David, said the inventor received a commercial order to “make 20 by Christmas but he didn’t have the facility to start manufacturing them”.

Speaking after the auction, Mr Bromley said he was a bit sad to part with the timepiece.

“It was always in the cupboard in my mother’s house. She died a couple of months ago and me and my sister felt we just wanted closure.”

Image caption Bromley missed out on commercial success and this digital clock, which went under the hammer, is the only one he produced

Remembering how his father was “an electrical engineer by day and an inventor by night”, Mr Bromley described how he was “always in his shed”.

“He’d come out at nine or 10 o’clock at night. He was like a mad professor in there.

“I used to go in there and sit and watch. He had all sorts of equipment and gadgets. That was his life.”

Bromley, who died in 1990, also invented curtains that automatically closed when the sun went down.

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