The apparatus is ruggedly built for heavy use. Two sturdy support rods are mounted on the base, with a yoke at the top of the rods and a chuck for holding the test wire.
The test wire passes through an adjustable bridge, secured to both ends, which holds the measuring attachment.Micrometer Method (Searle’s)The complete kit includes a Micrometer Screw Attachment consisting of a lever with a micrometer screw at one end and a sensitive spirit level at the other. The lever pivots on a chuck, which clamps the wire tightly. The point of the micrometer screw bears on a solid support.
After each addition of weight to the wire, the attachment is leveled using the screw and spirit level, and the elongation is determined from the movement of the screw.
The kit also includes the following components:- Heavy-duty base,
- Support rods,
- Yoke,
- Moveable bridge,
- Two steel wires of different diameters with clamps,
- Two 1kg and four 2kg slotted masses,
- Heavy-duty mass hanger (12kg capacity),
- Three wire-gripping chucks,
- Rods to tighten the bridge collet onto the wire.
The kits also include complete operating instructions and suggested experiments.
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