Browse Prior Art Database

Spiral Feed Auto Sample Handler

IP.com Disclosure Number: IPCOM000047410D
Original Publication Date: 1983-Nov-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 3 page(s) / 47K

Publishing Venue

IBM

Related People

Conrad, FL: AUTHOR [+3]

Abstract

Auto sample handlers for chromatography systems generally comprise a carrier for holding a multiplicity of liquid samples in vials. The carrier is moved so as to successively bring the vials beneath a syringe which is actuated to withdraw the sample and inject it into the chromatography system. Quite often, such auto sample handlers comprise at least two motors for moving the carrier in two directions to bring the sample vials into the desired position. Further, some sample handlers require that after the sample is withdrawn from a vial, the entire carrier has to be moved out of the way in order to inject the sample into the chromatography system.

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Spiral Feed Auto Sample Handler

Auto sample handlers for chromatography systems generally comprise a carrier for holding a multiplicity of liquid samples in vials. The carrier is moved so as to successively bring the vials beneath a syringe which is actuated to withdraw the sample and inject it into the chromatography system. Quite often, such auto sample handlers comprise at least two motors for moving the carrier in two directions to bring the sample vials into the desired position. Further, some sample handlers require that after the sample is withdrawn from a vial, the entire carrier has to be moved out of the way in order to inject the sample into the chromatography system. Shown in the drawing is an auto sample handler using a single motor for moving the samples into the desired position and in which the sample carrier need not be retracted when the sample is injected into the chromatography system. More specifically, the drawing is a side elevational view, partly in section and somewhat schematic, showing an auto sample handler 10. A circular plate or carrier 11 holds a multiplicity of vials 12 in a series of holes 13 opening upwardly on carrier 11. Holes 13 are arranged in a spiral pattern at equiangular positions, for example, 15OE apart. On the underside, carrier 11 has a continuous spiral groove 14. Carrier 11 overlies a bed plate or frame 15 upon which is mounted a pin 16 that fits into groove 14. Carrier 11 is mounted upon a rotatable shaft 17 which extends upwardly through a slide 18 and is connected to a rotary motor 19. The motor is mounted on slide 18 which in turn is supported by a pair of transversely spaced rails 20 mounted upon frame 15. Rotation of motor 19 rotates carrier 11 and through the interaction of pin 16 in groove 14 causes carrier 11 to shift laterally, to the left and right as viewed in the drawing. A syringe 22 is mounted in a holder 23 for vertical movement along a fixed path above carrier 11. A motor 24 is mounted on the holder 23, and through a rack 25 and pinion 26, operate the plunger or handle 27 of syringe 22 to selectively withdraw a sample from a vial 12 and later inject it into...