Sinclair Research

Sinclair Research Ltd
Company type	Private
Industry	Consumer electronics, Home computers
Predecessor	Science of Cambridge Ltd.
Founded	1970s in Cambridge, United Kingdom
Founder	Clive Sinclair
Fate	Sold computer product rights and brand to Amstrad in 1986; continued as sole proprietorship marketing Sinclair's inventions
Headquarters	Cambridge, United Kingdom
Area served	United Kingdom, United States (via Timex Sinclair)
Key people	Clive Sinclair (Founder)
Products	ZX80, ZX81, ZX Spectrum, Sinclair QL, TV80, Sinclair C5, Zike electric bicycle, A-bike folding bicycle
Number of employees	3 (by 1990), 1 (by 1997)

Sinclair Research Ltd is a UK-based consumer electronics firm established by Clive Sinclair in Cambridge during the 1970s. The company entered the home computer arena in 1980 with the release of the ZX80, priced at £99.95, making it the most affordable personal computer in the UK at that time. The next year saw the launch of the ZX81 through retail outlets, achieving sales exceeding 1.5 million units and significantly advancing home computing adoption. In 1982, the ZX Spectrum was introduced, becoming the best-selling computer in the UK and presenting strong competition to rivals such as Commodore and Amstrad.

Following setbacks from the unsuccessful Sinclair QL computer and the TV80 pocket television in 1985, financial troubles emerged. By 1986, Sinclair divested its computer product rights and brand to Amstrad. Nevertheless, Sinclair Research Ltd continued operating as a sole proprietorship marketing Clive Sinclair's inventions.

History

Profit and turnover statistics
Period	Profit	Turnover
1980	Increase £131K	£640K
1981	Increase £818K	£4.6m
1982	Increase £8.55m	£27.17m
1983	Increase £13.8m	£54.53m
1984	Increase £14.28m	£77.69m
1985	Decrease −£18m	£102m
1988 to 1989	Decrease −£183K	£8K
1989 to 1990	Increase £618K	£5K
1990 to 1991	Decrease −£272K	£5K
1991 to 1992	Decrease −£593K	£1K
1992 to 1993	Decrease −£169K	£380K
1993 to 1994	Decrease −£195K	£511K
1994 to 1995	Decrease −£304K	£436K
1995 to 1996	Decrease −£123K	£256K

Origins and initial development

Clive Sinclair established his initial enterprise, Sinclair Radionics Ltd., on 25 July 1961 in Cambridge. This firm specialized in producing hi-fi equipment, radios, calculators, and scientific devices. When Radionics encountered operational challenges, Sinclair sought to maintain his entrepreneurial activities by acquiring a dormant company named Ablesdeal Ltd in September 1973. This entity was subsequently renamed Westminster Mail Order Ltd in February 1975 and later became Sinclair Instrument Ltd in August of the same year.

Due to increasing complexity caused by the National Enterprise Board’s intervention in Radionics during 1976, Sinclair motivated Chris Curry—who had been employed there since 1966—to depart and concentrate on establishing Sinclair Instrument as a functioning business. The company's inaugural product was a calculator designed to be worn like a wristwatch.

Calculators

Introduced in 1972, the Sinclair Executive was the first calculator small enough to fit in a pocket and was priced significantly lower than other four-function calculators of the time. The following year, the Sinclair Cambridge debuted as a simple calculator but later expanded into models featuring memory storage, enhanced functions, and programmability. In 1974, the Sinclair Scientific was released, offering trigonometric and logarithmic calculations through the use of Reverse Polish Notation.

Development of the ZX80

In July 1977, Sinclair Instrument Ltd changed its name to Science of Cambridge Ltd.. Around this period, Ian Williamson presented Chris Curry with a microcomputer prototype built around the National Semiconductor SC/MP microprocessor, utilizing components derived from a Sinclair calculator. Curry, impressed by this innovation, persuaded Sinclair to adopt it commercially. Subsequently, in June 1978, Science of Cambridge launched the MK14 microcomputer kit.

By May 1979, Sinclair’s lead engineer Jim Westwood had designed a new microcomputer powered by the Zilog Z80 processor. This machine was introduced as the ZX80 in February 1980 by Science of Cambridge and was offered both as an assembly kit and as a pre-built unit.

Commercial success and home computers

When the Sinclair ZX80 was released in January 1980, the company operated under the name Sinclair Research Ltd, though it continued using the Science of Cambridge brand until March 1981. That same month, Sinclair Computers officially became Sinclair Research Ltd and unveiled the Sinclair ZX81. In February 1982, Timex Corporation secured licensing rights to distribute Sinclair’s computers in the United States under the Timex Sinclair brand. The ZX Spectrum was launched in April 1982, followed by Timex’s introduction of the TS 1000 for the US market in July. By March 1982, Sinclair Research Ltd announced a profit of £8.55 million on revenues totaling £27.17 million, which included a £383,000 government grant aimed at flat-screen technology development.

In 1982, Clive Sinclair transformed a bottling plant located at 25 Willis Road in Cambridge into the company’s headquarters; however, financial difficulties led to selling these premises to Cambridgeshire County Council in December 1985.

The ZX Spectrum made its debut at the Las Vegas Consumer Electronics Show in January 1983. Later that year in September, Sinclair introduced the TV80 pocket television; however, it did not achieve commercial success.

In 1983, Sinclair purchased Milton Hall in Cambridgeshire for £2 million to establish its MetaLab research and development center.

Towards the end of that year, Timex exited the US Timex Sinclair partnership due to intense competition but continued manufacturing Timex-branded computers elsewhere. Timex Portugal released enhanced models—the TS 2048 and 2068—and developed the FDD3000 floppy disk drive system, which saw only modest market acceptance.

Mid-1980s developments

The Sinclair QL, announced in January 1984 shortly before Apple introduced its Macintosh, suffered from design shortcomings and production delays that hindered its performance. The Advertising Standards Authority upheld complaints regarding delayed deliveries and premature cashing of customer cheques. Despite initial optimistic projections labeling it a "million seller," production of the QL ceased in February 1985 and prices were reduced by half by year-end.

In October 1984, Sinclair launched the ZX Spectrum+, which featured a redesigned keyboard resembling that of the QL. Although retailers expected strong sales initially, demand fell short leading to reduced orders. The ZX Spectrum 128 was developed with funding from Spanish distributor Investronica and launched in Spain in September 1985; its introduction to the UK market was postponed until January 1986 due to surplus inventory.

At January’s Las Vegas Consumer Electronics Show in 1985, Sinclair re-entered the US consumer market with an "FM Wristwatch Radio," combining an LCD watch with a radio receiver; however, manufacturing challenges prevented full-scale production.

Simultaneously, Sinclair expanded into electric vehicles through Sinclair Vehicles Ltd., established in March 1983. The Sinclair C5, a single-seat electric vehicle released in January 1985, sold only around 17,000 units and resulted in losses totaling £7 million. The company was liquidated later that year. The combined commercial failures of the C5, QL computer, and TV80 television significantly undermined investor trust in Sinclair’s management.

Acquisition of Sinclair assets by Amstrad

Sinclair Research had intended to initiate a public share issue on 12 March 1985; however, this was deferred due to instability within the microcomputer sector, including financial restructuring at Acorn Computers and insolvencies of rivals such as Oric and distributor Prism. This postponement reflected difficulties in securing investment, hindering Sinclair's expansion plans.

By 28 May 1985, Sinclair aimed to raise between £10 million and £15 million for corporate restructuring but encountered obstacles amid waning investor trust. In June, industrialist Robert Maxwell proposed acquiring the company through his Pergamon Press subsidiary Hollis Brothers, yet the agreement fell through by August.

A turning point arrived on 7 April 1986 when Sinclair divested its entire computer product portfolio and brand identity to Amstrad for £5 million. This transaction excluded the company entity itself, transferring solely the product lines and branding.

Formation of spin-off companies

Following the asset sale, Sinclair Research evolved into a research and development and holding entity, maintaining investments in various spin-offs that utilized its technological innovations. Key enterprises included Anamartic Ltd (specializing in wafer-scale integration), Shaye Communications Ltd (focused on CT2 mobile telephony), and Cambridge Computer Ltd (responsible for the Z88 portable computer and satellite television receivers).

Resumption of innovation

Since 1986, Sinclair Research continued operations under a different structure. Between 1993 and 1995, persistent financial losses accompanied declining sales, prompting concerns among investors that Sinclair was financing projects from his own resources. By 1990, personnel had reduced to Sinclair himself, a combined sales/administration role, and one research and development staff member; by 1997, only Sinclair remained active.

In 1992, Sinclair introduced the "Zike" electric bicycle—his second venture into personal transportation. Capable of reaching a maximum speed of , it was available exclusively via mail order but achieved sales of only around 2,000 units, paralleling the commercial disappointment of the C5. In 1999, he launched the "Z1 Micro AM Radio," recognized as the smallest radio worldwide.

The "ZA20 Wheelchair Drive Unit," released in 2003 in collaboration with Hong Kong-based Daka Designs, broadened their range of mobility aids and also inspired the SeaDoo Sea Scooter underwater propulsion device.

In July 2006, Sinclair unveiled the A-bike, a compact folding bicycle priced at £200 that had been announced two years earlier. Later, in November 2010, Sinclair Research announced the X-1 two-wheeled electric vehicle; however, it never proceeded to production.

Product lineup

Wrist Calculator

The Wrist Calculator was introduced by Sinclair Instrument in 1977.

Multimeter DM2

A digital multimeter featuring an LED display capable of measuring DC/AC voltage, current, and resistance was launched in 1975.

MK14

The MK14 (Microcomputer Kit 14) computer kit debuted in 1977 at a price of £39.95 under Science of Cambridge.

ZX80

Released in February 1980 at £79.95 for the kit version and £99.95 fully assembled, the ZX80 marked Sinclair’s initial venture into home computing. Later that year, Science of Cambridge was renamed Sinclair Computers Ltd.

ZX81

The ZX81, marketed as the TS 1000 in the United States, was offered at £49.95 as a kit and £69.95 ready-built via mail order.

ZX Spectrum

Launched on 23 April 1982 with prices set at £125 for the 16 KB RAM model and £175 for the 48 KB RAM version, the ZX Spectrum became a flagship offering.

TV80

The TV80, a pocket-sized television featuring a flattened CRT design released in September 1983, sold approximately 15,000 units but failed to recover its £4 million development expenditure.

Sinclair QL

Announced in January 1984 with a launch price of £399, the Sinclair QL targeted professional users by employing a Motorola 68008 processor with a 32-bit architecture. Production delays alongside hardware and software problems adversely affected its market reception.

ZX Spectrum+

Introduced in October 1984 as a redesigned ZX Spectrum 48K model with updated casing.

ZX Spectrum 128

Launched initially in Spain (September 1985) and subsequently in the UK (January 1986) at £179.95, this version featured increased RAM capacity to 128 kB along with improved audio capabilities.

Computer peripherals

Sinclair produced various accessories including memory expansions, the ZX Printer, and interface modules for the ZX Spectrum. The company adopted its proprietary tape-loop mass storage system—the ZX Microdrive—which suffered from reliability issues but served as primary storage on the QL.

X1 Button FM Radio

In June 1997, Sinclair Research introduced the X1 radio priced at £9.50. This small mono FM radio operated on a CR2032 battery with straightforward controls designed for use inserted into the ear.

Abandoned Projects

Several Sinclair Research initiatives from the 1980s reached development stages but were ultimately never launched:

LC3

The LC3 ("Low Cost Colour Computer") was conceived in 1983 by Martin Brennan as an economical Z80-based gaming console utilizing ROM and non-volatile RAM cartridges. Steve Berry engineered a multitasking operating system featuring a comprehensive windowed graphical user interface. This project was discontinued in November 1983 in favor of advancing the QL.

SuperSpectrum

This was a proposed home computer based on the 68008 processor, equipped with integrated ZX Microdrive, joystick support, RS-232, and ZX Net connectivity. Initially, Sinclair's SuperBASIC language was designed for this machine but was later incorporated into the QL. The project was terminated in 1982 as its specifications increasingly overlapped with those of the QL.

Pandora

A portable computing device featuring an integrated flat-screen CRT, compatibility with ZX Spectrum software, a higher-speed Z80 CPU, built-in ZX Microdrive, and a novel 512×192 monochrome display mode. Due to limitations imposed by screen size that necessitated folding lenses, the initiative was cancelled following Amstrad's acquisition. The concept subsequently influenced the development of the Cambridge Computer Z88.

Loki

Designed to be a significantly upgraded ZX Spectrum competitor to rival the Commodore Amiga, this system included a 7 MHz Z80H CPU, 128 KiB of RAM, and custom chips for enhanced graphics and sound capabilities. After Amstrad took over in 1986, engineers John Mathieson and Martin Brennan established Flare Technology to continue development efforts.

Bob/Florin

According to Rupert Goodwins, this was a floppy disk drive expansion project intended for the ZX Spectrum.

Tyche

A successor to the QL developed between 1984 and 1986, aiming to expand RAM capacity, incorporate internal floppy drives, embed the Psion Xchange software suite in ROM, and potentially include the GEM graphical user interface.

Janus

Linked to a "Super QL" design concept utilizing wafer-scale integration technology.

Proteus

Allegedly a portable variant of the QL similar in concept to Pandora.

Sinclair X-1

Announced by Sir Clive Sinclair in 2010 as a prototype electric vehicle expected to launch within one year. This two-wheeled model was priced at £595 with a planned release date in July 2011 but never proceeded to production.

External links