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The purpose of the illustrated mechanism is to raise a fabric sample S vertically against a fixed spectrophotometric sensing head 1 and to apply a specific pressure.
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
66% of the total text.
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Textile Sample Handler Elevator Mechanism
The purpose of the illustrated mechanism is to raise a fabric sample S
vertically against a fixed spectrophotometric sensing head 1 and to apply a
A handle 10 is attached to a crank shaft 11 and imparts
rotational force to it. A crank 12 is clamped to the crank shaft 11.
An arm 14 pivots on a pivot shaft 15 and imparts vertical motion to
the post 16 and elevator pad 17 through a thrust pin 18. Post 16
moves in a guide block 26 fitted into a frame 27. The motion of
crank 12 is transmitted to arm 14 through links 13 via a crank pin 19
and arm pin 20. A plate 22 is fastened to the ends of links 13,
and serves as a guide and bearing surface for a tension adjust screw
23 which screws into and retains a spring bar 24. Spring bar 24 fits
into, and protrudes slightly beyond, slots in the links 13 and has a
screw in each end, as shown. Tension springs 25 are connected
between the arm pin 20 screws and the spring bar 24 screws.
In Fig. 2, links 13 are held against arm pin 20 by springs 25. As the handle 10
is rotated, the crank shaft 11 and crank 12 rotates counter clockwise forcing the
arm 14 through the links 13 to pivot and raise the post 16 and pad 17 to the
dotted position shown in Fig. 1. This continues until pad 17 contacts sense head
1, stopping further motion of post 16 and arm 14. As crank 12 continues to
rotate, slotted links 13 slide along arm pin 20, stretching springs 25 and applying