Sinclair Research Ltd is a British consumer electronics company founded by
Clive Sinclair
Sir Clive Marles Sinclair (30 July 1940 – 16 September 2021) was an English entrepreneur and inventor, best known for being a pioneer in the computing industry, and also as the founder of several companies that developed consumer electronics ...
in
Cambridge. It was originally incorporated in 1973 as Westminster Mail Order Ltd, renamed Sinclair Instrument Ltd, then Science of Cambridge Ltd, then Sinclair Computers Ltd, and finally Sinclair Research Ltd. It remained dormant until 1976, when it was activated with the intention of continuing Sinclair's commercial work from his earlier company
Sinclair Radionics, and adopted the name Sinclair Research in 1981.
In 1980, Clive Sinclair entered the
home computer market with the
ZX80 at £99.95, at that time the cheapest personal computer for sale in the
United Kingdom. In 1982 the
ZX Spectrum was released, becoming the UK's best selling computer, and competing aggressively against
Commodore and
Amstrad.
At the height of its success, and largely inspired by the Japanese
Fifth Generation Computer program, the company established the "MetaLab" research centre at Milton Hall near
Cambridge, in order to pursue
artificial intelligence,
wafer-scale integration,
formal verification and other advanced projects. A combination of the failures of the
Sinclair QL computer and the
TV80 led to financial difficulties in 1985, and a year later Sinclair sold the rights to its computer products and brand name to
Amstrad. Sinclair Research Ltd continued to exist as a one-man company, marketing Clive Sinclair's inventions until his death in September 2021.
History
Founding and early years
On 25 July 1961, Clive Sinclair founded his first company,
Sinclair Radionics Ltd. in
Cambridge. The company developed
hi-fi products, radios, calculators and scientific instruments. When it became clear that Radionics was failing, Sinclair took steps to ensure that he would be able to continue to pursue his commercial goals. In February 1975, he changed the name of Ablesdeal Ltd (a
shelf company he had bought in September 1973 for just such an eventuality) to Westminster Mail Order Ltd. The name was changed to Sinclair Instrument Ltd in August 1975.
Finding it inconvenient to share control after the
National Enterprise Board became involved in Radionics in 1976, Sinclair encouraged
Chris Curry
Christopher Curry (born 28 January 1946 in Cambridge) is the co-founder of Acorn Computers, with Hermann Hauser and Andy Hopper. He became a millionaire as a result of Acorn's success.
In his early career days, he worked at Pye, Royal Radar ...
to leave Radionics, which he had worked for since 1966, and get
Sinclair Instrument operational. The company's first product was a watch-like Wrist Calculator.
Development of the ZX80
In July 1977, Sinclair Instrument Ltd was renamed Science of Cambridge Ltd. Around the same time, Ian Williamson showed Chris Curry a prototype
microcomputer
A microcomputer is a small, relatively inexpensive computer having a central processing unit (CPU) made out of a microprocessor. The computer also includes memory and input/output (I/O) circuitry together mounted on a printed circuit board (PC ...
based on a
National Semiconductor SC/MP microprocessor and parts from a Sinclair calculator. Curry was impressed and encouraged Sinclair to adopt it as a product. In June 1978, Science of Cambridge launched its
MK14 microcomputer in kit form.
In May 1979,
Jim Westwood, Sinclair's chief engineer, designed a new microcomputer based on the
Zilog Z80 microprocessor. Sinclair Instrument Ltd introduced the computer as the
ZX80 in February 1980, as both a kit and ready-built.
In November 1979, Science of Cambridge Ltd was renamed Sinclair Computers Ltd.
Commercial success and home computers

In March 1981, Sinclair Computers was renamed Sinclair Research Ltd and the
Sinclair ZX81 was launched. In February 1982,
Timex Corporation obtained a license to manufacture and market Sinclair's computers in the
USA under the name
Timex Sinclair. In April the
ZX Spectrum was launched. In July Timex launched the
TS 1000 (a version of the ZX81) in the
United States. In March 1982 Sinclair Research Ltd made an £8.55m profit on turnover of £27.17m, including a £383,000 government grant to develop a flat screen.
In 1982 Clive Sinclair converted the Barker & Wadsworth
mineral water bottling factory at 25 Willis Road, Cambridge, into the company's new headquarters. (Following Sinclair's financial troubles, the premises were sold to Cambridgeshire County Council in December 1985.)
In January 1983 the ZX Spectrum personal computer was presented at the
Las Vegas Consumer Electronics Show
CES (; formerly an initialism for Consumer Electronics Show) is an annual trade show organized by the Consumer Technology Association (CTA). Held in January at the Las Vegas Convention Center in Winchester, Nevada, United States, the event typi ...
. In September the Sinclair
TV80 pocket
television was launched, but was a commercial failure.
In 1983 the company bought Milton Hall in the village of
Milton, Cambridgeshire, for £2m, establishing its ''MetaLab'' research and development facility there.
In late 1983 Timex decided to pull out of the Timex Sinclair venture which, due to strong competition, had failed to break into the United States market. However, Timex computers continued to be produced for several years in other countries. Timex Portugal launched improved versions, the
TS 2048 and
2068
In contemporary history, the third millennium of the anno Domini or Common Era in the Gregorian calendar is the current millennium spanning the years 2001 to 3000 ( 21st to 30th centuries). Ongoing futures studies seek to understand what is l ...
; that company also developed and launched the
FDD3000, a
floppy disk
A floppy disk or floppy diskette (casually referred to as a floppy, or a diskette) is an obsolescent type of disk storage composed of a thin and flexible disk of a magnetic storage medium in a square or nearly square plastic enclosure lined w ...
system, although it was not well received by the market.
Mid-1980s developments
The
Sinclair QL was announced on 12 January 1984, shortly before the
Apple Macintosh went on sale.
The QL was nowhere near as successful as Sinclair's earlier computers. It suffered from several design flaws,
and ''
Your Sinclair'' noted that it was "difficult to find a good word for Sinclair Research in the computer press".
Fully working QLs were not available until late summer and complaints against Sinclair regarding delays were upheld by the
Advertising Standards Authority in May of that year. (In 1982 it had upheld complaints about delays in shipping Spectrums.) Especially severe were allegations that Sinclair was cashing cheques months before machines were shipped. In the autumn Sinclair was still publicly predicting it would be a "million seller", and that 250,000 would be sold by the end of the year.
QL production was suspended in February 1985, and the price was halved by the end of the year.
The ZX Spectrum+, a repackaged ZX Spectrum with a QL-like keyboard, was launched in October 1984 and appeared in
WHSmith's shops the day after release. Retailers stocked the machine in large numbers in expectation of good Christmas sales. However, the machine did not sell as well as expected and, because retailers still had unsold stock, Sinclair's income from orders dipped alarmingly in January. The Spectrum+ had the same technical specifications as the original Spectrum. An enhanced model, the ZX Spectrum 128, was launched in Spain in September 1985, with development funded by the Spanish distributor Investronica.
The UK launch of this was delayed until January 1986, because retailers had large unsold stocks of the previous model.
At the January 1985 Las Vegas Consumer Electronics Show, Sinclair re-entered the United States market, announcing the "FM Wristwatch Radio", an
LCD
A liquid-crystal display (LCD) is a flat-panel display or other electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers. Liquid crystals do not emit light directly but in ...
wristwatch with a
radio attached.
However, the watch had several problems and never went into full production.
Sinclair had long had an interest in electric vehicles, and during the early 1980s he worked on the design of a single-seater "personal vehicle", eventually starting a company called Sinclair Vehicles Ltd in March 1983. He launched the
Sinclair C5
The Sinclair C5 is a small one-person battery electric recumbent tricycle, technically an "electrically assisted pedal cycle". It was the culmination of Sir Clive Sinclair's long-running interest in electric vehicles. Although widely described a ...
electric vehicle on 10 January 1985, but it was a commercial disaster, selling only 17,000 units and losing Sinclair £7,000,000. Sinclair Vehicles went into liquidation later the same year. The failure of the C5, combined with those of the QL and the
TV80, caused investors to lose confidence in Sinclair's judgement.
Amstrad acquisition of assets
Sinclair Research had reportedly intended a public offering of shares on 12 March 1985, but this offering was postponed, ostensibly due to turmoil in the microcomputer industry, with
Acorn Computers undergoing refinancing, and other companies such as Sinclair's competitor
Oric and distributor Prism entering receivership. Although the collapse of the latter was not expected to have a significant effect on Sinclair's ability to reach customers, the observation was made that "Sir Clive would not be trying to go public unless he thought he could use the cash", indicating that the postponement of an offering whose timing would have been planned for optimal effect would be a setback for the company.
On 28 May 1985, Sinclair Research had announced it wanted to raise an extra £10m to £15m to restructure the organisation. Given the loss of confidence in the company, the money proved hard to find. In June 1985,
business magnate
A business magnate, also known as a tycoon, is a person who has achieved immense wealth through the ownership of multiple lines of enterprise. The term characteristically refers to a powerful entrepreneur or investor who controls, through perso ...
Robert Maxwell announced a takeover of Sinclair Research, through Hollis Brothers, a subsidiary of his
Pergamon Press.
However, the deal was aborted in August 1985.
The future of Sinclair Research remained uncertain until 7 April 1986, when the company sold its entire computer product range, and the "Sinclair" brand name, to
Amstrad for £5 million. The deal did not include the company itself, only its name and products.
Spin-offs
Sinclair Research was reduced to an
R&D business and a
holding company, with shareholdings in several new "spin-off" companies formed to exploit technologies developed by the main company. These included Anamartic Ltd (
wafer-scale integration), Shaye Communications Ltd (
CT2
CT2 is a cordless telephony standard that was used in the early 1990s to provide short-range proto-mobile phone service in some countries in Europe. It is considered the precursor to the more successful DECT system. CT2 was also referred to by its ...
mobile telephony) and Cambridge Computer Ltd (
Z88 portable computer and
satellite television receivers).
Return to invention

Since 1986, the company has continued to exist, but in a completely different form. In 1993, 1994 and 1995 Sinclair made continuing losses on decreasing turnover. Investors became worried that Clive Sinclair himself was using his own personal wealth to fund his inventions. By 1990 the company's entire staff had been reduced to just Sinclair himself, a salesman/administrator, and an R&D employee. By 1997 only Sinclair himself was working at his company.
In 1992, the "
Zike" electric bicycle was released, Sinclair's second attempt at changing people's means of transport. It had a maximum speed of , and was only available by mail order. Much like the
C5, the "Zike" was a commercial failure, and sold only 2,000 units. In 1999 Sinclair released the world's smallest radio, in the form of the "Z1 Micro AM Radio".
In 2003, the Sinclair "ZA20 Wheelchair Drive Unit" was introduced, designed and manufactured in conjunction with Hong Kong's Daka Designs, a partnership which also led to the SeaDoo Sea Scooter underwater propulsion unit.
July 2006 saw the release of the
A-bike, a
folding bicycle invented by Sinclair, which was on sale for £200. It had been originally announced two years previously. In November 2010, Sinclair Research announced the X-1 two-wheel electric vehicle, which failed to reach production.
Products
;Wrist Calculator
The
Wrist Calculator was released by Sinclair Instrument in 1977.
;Multimeter DM2
A digital
multimeter with an LED display, measuring voltage (DC and AC), current and resistance, released in 1975.
;MK14
The
MK14 (Microcomputer Kit 14) was a
computer kit sold by Science of Cambridge, introduced in 1977 for £39.95.
;ZX80
The
ZX80 home computer was launched in February 1980 at £79.95 in kit form and £99.95 ready-built.
In November of the same year Science of Cambridge was renamed Sinclair Computers Ltd.

;ZX81
The
ZX81 (known as the
TS 1000 in the United States) was priced at £49.95 in kit form and £69.95 ready-built, by mail order.

;ZX Spectrum
The
ZX Spectrum was launched on 23 April 1982, priced at £125 for the 16
KB RAM version and £175 for the 48 KB version.
;TV80
The
TV80 was a pocket
television. Launched in September 1983, it used a flattened
CRT
CRT or Crt may refer to:
Science, technology, and mathematics Medicine and biology
* Calreticulin, a protein
*Capillary refill time, for blood to refill capillaries
*Cardiac resynchronization therapy and CRT defibrillator (CRT-D)
* Catheter-re ...
unlike Sinclair's previous portable televisions. The TV80 was a commercial failure selling only 15,000 units and not covering its development costs of £4m.
;Sinclair QL
The
Sinclair QL was announced in January 1984,
priced at £399. Marketed as a more sophisticated
32-bit
In computer architecture, 32-bit computing refers to computer systems with a processor, memory, and other major system components that operate on data in 32-bit units. Compared to smaller bit widths, 32-bit computers can perform large calculation ...
microcomputer
A microcomputer is a small, relatively inexpensive computer having a central processing unit (CPU) made out of a microprocessor. The computer also includes memory and input/output (I/O) circuitry together mounted on a printed circuit board (PC ...
for professional users, it used a
Motorola 68008
The Motorola 68008 is an 8/32-bit microprocessor introduced by Motorola in 1982. It is a version of 1979's Motorola 68000 with an 8-bit external data bus, as well as a smaller address bus. The 68008 was available with 20 or 22 address lines (r ...
processor. Production was delayed by several months, due to unfinished development of hardware and software at the time of the QL's launch.
Hardware reliability problems and software bugs resulted in the QL acquiring a poor reputation from which it never recovered.
;ZX Spectrum+
The ZX Spectrum+ was a repackaged ZX Spectrum 48K, launched in October 1984.
;ZX Spectrum 128
The ZX Spectrum 128, with RAM expanded to 128 kB, a
sound chip and other enhancements, was launched in Spain in September 1985 and the UK in January 1986, priced at £179.95.
;Computer peripherals
Sinclair created various peripherals for its computers, including memory expansion modules, the
ZX Printer, and the
ZX Interface 1 and
ZX Interface 2
The ZX Interface 2 is a peripheral from Sinclair Research for its ZX Spectrum home computer released in September 1983. It has two joystick ports and a ROM cartridge slot, which offers instant loading times. The joystick ports are not compatible ...
add-ons for the ZX Spectrum. A number of QL peripherals were developed by other companies but marketed under the Sinclair brand. External storage for the Spectrum was usually on
cassette tape
The Compact Cassette or Musicassette (MC), also commonly called the tape cassette, cassette tape, audio cassette, or simply tape or cassette, is an analog magnetic tape recording format for audio recording and playback. Invented by Lou Ottens ...
s, as was common in that era. Rather than an optional
floppy disk drive, Sinclair instead opted to offer its own
mass storage system, the
ZX Microdrive, a tape-loop cartridge system that proved unreliable. This was also the primary storage device for the QL.

;X1 Button FM Radio
In June 1997 Sinclair Research released the X1 radio for £9.50. This miniature mono
FM radio
FM broadcasting is a method of radio broadcasting using frequency modulation (FM). Invented in 1933 by American engineer Edwin Armstrong, wide-band FM is used worldwide to provide high fidelity sound over broadcast radio. FM broadcasting is cap ...
, powered by a
CR2032 battery, had a fixed volume and was inserted in the ear. The X1 radio had three buttons, an on/off switch, a ''Scan'' button, and a ''Reset'' button to restart the scanning process. It came with a short length of aerial and a detachable ear hook.
Cancelled projects
The following computer products were under development at Sinclair Research during the 1980s but never reached production:
;LC3
Standing for "Low Cost Colour Computer", the ''LC3'' was developed during 1983 by
Martin Brennan and was intended to be a cheap Z80-based games console implemented in two chips, using
RAM and (non-volatile)
RAM cartridges for storage. A multi-tasking
operating system for the ''LC3'', with a full windowing
GUI, was designed by Steve Berry. It was cancelled in November 1983 in favour of the
QL.
;SuperSpectrum
Intended to be a
68008-based
home computer, equipped with built-in
ZX Microdrive, joystick,
RS-232 and ZX Net ports. Sinclair's
SuperBASIC programming language was originally intended for this model but was later adopted for the QL. ''SuperSpectrum'' was cancelled in 1982 after the specification of the ''ZX83'' (QL) had converged with it.
This project is not to be confused with ''Loki'', which was described as the "SuperSpectrum" in an article in the June 1986 issue of ''
Sinclair User'' magazine.
;Pandora
This was to be a portable computer with an integral flat-screen
CRT
CRT or Crt may refer to:
Science, technology, and mathematics Medicine and biology
* Calreticulin, a protein
*Capillary refill time, for blood to refill capillaries
*Cardiac resynchronization therapy and CRT defibrillator (CRT-D)
* Catheter-re ...
display. Initially to be
ZX Spectrum-compatible with a faster
Z80 CPU
A central processing unit (CPU), also called a central processor, main processor or just processor, is the electronic circuitry that executes instructions comprising a computer program. The CPU performs basic arithmetic, logic, controlling, and ...
, a built-in
ZX Microdrive and a new 512×192-pixel monochrome video mode. Due to the limited size of flat CRT that could be manufactured, a series of folding lenses and mirrors were necessary to magnify the screen image to a usable size. The project was cancelled after the Amstrad take-over, but the ''Pandora'' concept eventually transformed into the Cambridge Computer
Z88.
;
Loki
Loki is a god in Norse mythology. According to some sources, Loki is the son of Fárbauti (a jötunn) and Laufey (mentioned as a goddess), and the brother of Helblindi and Býleistr. Loki is married to Sigyn and they have two sons, Narfi or Na ...
This project was intended to create a greatly enhanced
ZX Spectrum, possibly rivalling the
Commodore Amiga. ''Loki'' was to have a 7 MHz
Z80H
CPU
A central processing unit (CPU), also called a central processor, main processor or just processor, is the electronic circuitry that executes instructions comprising a computer program. The CPU performs basic arithmetic, logic, controlling, and ...
, 128 KiB of RAM, and two custom chips providing much enhanced graphics and audio capabilities. After the Amstrad buy-out in 1986, two engineers who had worked on the project,
John Mathieson and
Martin Brennan, founded
Flare Technology to continue their work.
;Bob/Florin
According to
Rupert Goodwins, this was a project to produce an add-on
floppy disk
A floppy disk or floppy diskette (casually referred to as a floppy, or a diskette) is an obsolescent type of disk storage composed of a thin and flexible disk of a magnetic storage medium in a square or nearly square plastic enclosure lined w ...
drive for the
ZX Spectrum.
;Tyche
This codename was assigned to a QL follow-on project running from 1984 to 1986. Among the features associated with ''Tyche'' were increased RAM capacity, internal
floppy disk
A floppy disk or floppy diskette (casually referred to as a floppy, or a diskette) is an obsolescent type of disk storage composed of a thin and flexible disk of a magnetic storage medium in a square or nearly square plastic enclosure lined w ...
drives, the
Psion ''Xchange'' application suite on ROM, and possibly the
GEM
A gemstone (also called a fine gem, jewel, precious stone, or semiprecious stone) is a piece of mineral crystal which, in cut and polished form, is used to make jewelry or other adornments. However, certain rocks (such as lapis lazuli, opal, a ...
GUI.
;Janus
This name has been associated with a design concept for a "Super QL" based on
wafer-scale integration technology.
;Proteus
This was rumoured to be a hypothetical portable version of the QL similar to ''Pandora''.
;Sinclair X-1
In November 2010 Sinclair told ''
The Guardian'' newspaper that he was working on a new prototype electric vehicle, called the
X-1 X1, X-1 or X-one may refer to:
Transportation Aircraft
* Bell X-1, the first aircraft to exceed the speed of sound in controlled level flight
Automobiles
* BMW X1, a 2009–present German subcompact luxury SUV
* Geely Yuanjing X1, a 2017–202 ...
, to be launched within a year. "Technology has moved on quite a bit, there are new batteries available and I just rethought the thing. The C5 was OK, but I think we can do a better job now." The two-wheel X-1 was to have been available in July 2011 at the price of £595, but failed to reach production.
See also
*
Sinclair BASIC
Sinclair BASIC is a dialect of the programming language BASIC used in the 8-bit home computers from Sinclair Research and Timex Sinclair. The Sinclair BASIC interpreter was made by Nine Tiles Networks Ltd.
History
Sinclair BASIC was orig ...
*
Sinclair C5
The Sinclair C5 is a small one-person battery electric recumbent tricycle, technically an "electrically assisted pedal cycle". It was the culmination of Sir Clive Sinclair's long-running interest in electric vehicles. Although widely described a ...
*
Sinclair Executive
*
Sinclair Radionics
*
Sinclair Scientific
The Sinclair Scientific calculator was a 12-function, pocket-sized scientific calculator introduced in 1974, dramatically undercutting in price other calculators available at the time. The Sinclair Scientific Programmable, released a year later, ...
*
Sinclair Vehicles
Sinclair Vehicles Ltd was a company formed in March 1983 by Sir Clive Sinclair as a focus for his work in the field of electric vehicles. The initial investment was £8.6m, which came from the proceeds of the sale of some of Sir Clive's shares i ...
*
Timex Sinclair
*
TV80
*
Sinclair President
The Sinclair President is a calculator released by Sinclair Radionics in early 1978. There were two models, the President and the President Scientific. They were among the last calculators produced by Sinclair, and their large size was in contrast ...
References
Further reading
* Adamson, Ian; Kennedy, Richard (1986). ''Sinclair and the "Sunrise" Technology''. London: Penguin Books. 224 pp. .
* Dale, Rodney (1985). ''The Sinclair Story''. London: Duckworth. 184 pp. .
* Tedeschi, Enrico (1986). ''Sinclair Archaeology: The Complete Photo Guide to Collectable Models''. Portslade: Hove Books. 130 pp. .
External links
Sinclair Nostalgia ProductsPlanet Sinclair'Pocket TVs failed before. What's changed?', BBC News Magazine articleZX81 Online Museumwww.1000bit.net, 1000BiT Sinclair's section
{{Sinclair computers and clones
Defunct computer companies of the United Kingdom
Electronics companies of the United Kingdom
Defunct software companies of the United Kingdom
Electronics companies established in 1973
Computer companies established in 1973
Companies based in Cambridge
Defunct companies based in London
British companies established in 1973
1986 mergers and acquisitions