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Components of a modern bottleneck rifle cartridge. Top-to-bottom: Copper-jacketed bullet, smokeless powder granules, rimless brass case, Boxer primer.. Handloading, or reloading, is the practice of making firearm cartridges by manually assembling the individual components (metallic/polymer case, primer, propellant and projectile), rather than purchasing mass-assembled, factory-loaded ...
A user operating a Black Watch. The Black Watch is an electronic wristwatch launched in September 1975 by Sinclair Radionics. It cost £24.95 ready-built, but was also available for £17.95, as a kit. [1] These prices are equivalent to around £230 and £160 respectively in 2023, when adjusted for inflation. The Black Watch was supplied with a ...
Sinclair's final 1960s radio kit was the 1967 "Micromatic", billed as "the world's smallest radio" like Sinclair's earlier radios. The "Micromatic" was a reasonable success and was sold until 1971. In May 1971 Sinclair Radionics made £85,000 profit on £563,000 turnover; the following year profit increased to £97,000 on turnover of £761,000.
Joyce W. Hornady began manufacturing bullets in the spring of 1949 with a .30 caliber 150 gr (9.7 g) spire point selling for $4.50 per hundred. Within a year Hornady was producing thirteen different bullets in five different calibers. The Korean War caused material shortages limiting early production. An early innovation was thinner copper ...
The ZX Microdrive is a magnetic-tape data storage system launched in July 1983 by Sinclair Research for its ZX Spectrum home computer. It was proposed as a faster-loading alternative to the cassette and cheaper than a floppy disk, but it suffered from poor reliability and lower speed. Microdrives used tiny cartridges containing a 5-metre (200 ...
56 by 138 by 9 millimetres (2.20 in × 5.43 in × 0.35 in) The Sinclair Executive was the world's first "slimline" pocket calculator, and the first to be produced by Clive Sinclair 's company Sinclair Radionics. Introduced in 1972, the calculator was produced in at least two versions with different keyboard markings; a variant called the ...
50 by 111 by 28 millimetres (2.0 in × 4.4 in × 1.1 in) The Sinclair Cambridge was a pocket-sized calculator introduced in August 1973 by Sinclair Radionics. It was available both in kit form to be assembled by the purchaser, or assembled prior to purchase. The range ultimately comprised seven models, the original "four-function" Cambridge ...
TV80. The Sinclair TV80, also known as the Flat Screen Pocket TV or FTV1, was a pocket television released by Sinclair Research in September 1983. Unlike Sinclair's earlier attempts at a portable television, the TV80 used a flat CRT with a side-mounted electron gun instead of a conventional CRT; the picture was made to appear larger than it was ...