Vacuum news

layers, and displays its spectrum on an X-Y recorder.

The optical system of the analyzer can also be used for low-energy electron diffraction, LEED, studies. Thus comple- mentary surface research techniques, LEED to determine lattice structure and Auger Electron Spectroscopy to identify elements, are available in a single instrument. Varian Vacuum Division. USA Circle number 58 on Reader Enquiry Service card

Varian offers new service facility Varian Associates of Canada Ltd, Georgetown, Ontario, have announced the establishment of a new service facility, and the appointment of Eugene Kunycia, CET, as Service Technologist for Varian vacuum equipment in Manitoba and eastern Canada. Mr Kunvcia is resDonsible to Jerome L Levine, Vacuum Products Marketing Manager. His duties include the checkout and demonstration of new vacuum systems, with orientation sessions in the laboratories of customers. In addition to making overhaul repairs at the Varian plant in Georgetown, he also performs out-of-warranty repairs on an hourly basis plus the costs of travel, and he is able to service even the most sophisti- cated vacuum systems.

Mr Kunycia graduated from a European technical school, specializing in electrical technology. After moving to Canada at the age of 19, he obtained matriculation and went on to attend the University of Waterloo,majoringinelectricalengineering. In 1960 he ioined Varian of Canada and ___ _. _~ was initially- responsible for the electrical testing of microwave tubes. He has helped design and build equipment which is used in the production and testing of microwave components. Finally, in 1968 he completed a course of intensive instruction in the theory, application and servicing of Varian vacuum products. He also attended a concentrated training course in the Company’s headquarters at Palo Alto, California, and at the Varian plant in Portland, Oregon.

Rotary vacuum pump displacements Edwards Vacuum Components Limited have announced that the displacements of twelve models of their rotary high vacuum pumps, up to 6OO/litres/minute (21fts/ minute) will be increased by 15-20 per cent and that this has been achieved without increasing the price or making significant changes in outfit dimensions. The increased displacements will result in shorter pump- down times and sharply increased pro- ductivity, particularly in those applications where fast cycling is required; for example colour TV tube evacuation, lamp and valve pumping tables, vacuum coating of semi- conductor devices.

A research project which started in early 1963 has resulted in the use of a new blade material with such superior qualities in terms of anti-seize and anti-vibration characteristics that the pumps have an even longer life expectancy running at higher rotational speeds than the previous models running at slower speeds. A significant part

of the development programme has centred on the requirement to maintain the rigid quietness standards which have long been a feature of the Edwards rotary pump range and which it was felt could not be sacrificed to achieve the higher performances.

New investigational techniques were evolved during this project including the insertion of tiny pressure transducers into the heart of the test pumps to plot oil pressure surges, which could be related to signals obtained from piezo-electric devices and visual inspection of oil flow with the aid of stroboscopes. As a result of these techniques the members of the Edwards R & D and production teams are confident that the uprated pumps are quiet by design. In an endeavour to ensure the reliability of pumps which are mass produced, hundreds of the new production pumps have already been out on protracted field trials in applications specially selected for their arduous nature; “straight- through” colour TV tube pumping tables, pharmaceutical freeze drying, oil-filled cable evacuation, “dirty” chemical pump- ina svstems. In addition to the field trials ev&-tougher life tests were conducted in the Edwards laboratories totalling fifty thousand pump hours including 100,000 three-minute cycles from atmospheric pressure to ultimate vacuum. Edwards High Vacuum Ltd, UK Circle number 60 on Reader Enquiry Service card

Edwards’ spectrometer in international svmnosium At -the recently held 7th International Symposium and Exhibition on Gas Chromatography and its Exploitation, Falkonercentret, Copenhagen, Edwards High Vacuum Ltd displayed their new fast scanning 60” spectro;neter linked to a gas

Mr D Riley far right at the Copenhagen Exhibition

Oil pressure surges inside the uprated Edwards rotary vacuum pumps were detected by means of this tiny pressure transducer buried in the stator

chromatography column to give direct and continuous elucidation of gas chromato- gram. In attendance at the stand was the Managing Director of Edwards, Mr D Riley, who combined the exhibition with a visit to distributors in Norway, Sweden and Denmark. Accounts of Tenney Engineering Inc Tenney Engineering Inc of Union, New Jersey, report that earnings for the first six months of 1968 have already slightly exceeded their total income for 1967. Tenney are one of the leading engineers and manufacturers of environmental test and electronic equipment.

Saul S Schiffman, the Chairman, stated that the net income for the six months ending June 30 1968 was $158,796, or 24 cents per share, compared with the figure of

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