Control knobs having rigid projections in the setting port which incise into the shaft of the control element possess operating advantages over the knobs of other constructions. But they are unprofitable in production because of the mechanical treatment method. Considerably technical and economical higher profit can be attained by casting the knobs according to melted models.

Medical Laboratory Science↗

PubMedDate not supplied

[Technology of preparing gauges for calibration of medical syringe cylinders].

Thermal treatment substantially influences the resistance of calibres used in mollification (vacuum calibrating) of glass cylinders for medical syringes, the highest resistance of calibres made of the XH32T alloy and the 12X18H10T steel being achieved through their preliminary annealing in the argon atmosphere. The quality of manufactured syringes is affected also by wrong calibres shape and, formostly, by their out-of-roundness, whose degree in individual cases reaches 2--3 micrometer.

Syringes↗