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This article relates generally to centrifuges and more particularly to safety mechanisms therefor which prevent operation of such an apparatus when its cover is unlatched.
English (United States)
This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately
75% of the total text.
Page 1 of 2
Fail Safe Centrifuge Cover Spring Loaded Plunger Lock Mechanism
This article relates generally to centrifuges and more particularly to safety
mechanisms therefor which prevent operation of such an apparatus when its
cover is unlatched.
A centrifuge bowl cover interlock mechanism 1, which insures that the bowl
cover is securely locked to the centrifuge bowl before the machine ready
condition can be obtained, is shown in Fig. 1. Mechanism 1 consists of three
basic components: a plunger sleeve 2 grounded to a bowl cover 3, a
compression spring 4, and a push button plunger shaft assembly 5.
Plunger sleeve 2 is attached to the centrifuge bowl cover 3 handle rim.
Compression spring 4 is then assembled into the plunger sleeve 2 groove 6. The
two component push button plunger shaft assembly 5 is attached to sleeve 2 by
placing a plate 7 over compression spring 4 and loading shaft 8 into sleeve 2.
Plate 7 and shaft 8 are then screwed together. When plate 7 engages stud 9,
shaft 8 remains up, preventing the closure of safety doors which must be closed
to permit operation of the centrifuge.
Mechanism 1 operates as follows: As shown in Fig. 2, bowl cover 3 is
positioned over the studs 9 which extend from the centrifuge bowl. Until bowl
cover 3 is rotated, a stud 9 butts against plate 7, forcing shaft 8 to remain in an
open unlatched condition. Plunger shaft 8 in an up condition interferes with and
prevents the closing of the "ON-OFF sliding safety covers". When bowl cover 3