Apparatus for measuring penetration of tubes of a penetrometer

Details Apparatus for measuring penetration of tubes of a penetrometer Apparatus for measuring penetration of tubes of a penetrometer

1975-08-04

1976-06-22

Myracle, Jerry W.

Measuring and testing

Hardness

By penetrator or indentor

G01N 342

Patent

active

039642984

ABSTRACT:
A housing adjacent the anvil of a penetrometer has a pair of parallel upright guides on one of which is slideable a first counterweight and on the other of which slides a second counterweight and a slide underneath this second counterweight. The first counterweight weighs more than the slide but less than the slide and second counterweight together. A chain passes over a sprocket at the top of the housing and has one end secured to the first counterweight and another end to the slide. An abutment on the second counterweight engages over a follower on the anvil so that as the anvil goes up and down the second counterweight follows it. During normal descent of the anvil and second counterweight a ratchet engaging the wheel prevents return rotation of this wheel, but once the second counterweight is all the way at the bottom of its guide the ratchet is pulled back. Upward movement of this second counterweight from this position through a distance equal to one tube length reactuates the ratchet. A recorder is connected through a unidirectional clutch with the shaft of the wheel so as only to respond to rotation of this wheel corresponding to downward driving of a tube.

REFERENCES:
patent: 2580299 (1951-12-01), Hunicke
patent: 2607218 (1952-08-01), Hansen
patent: 3498388 (1970-03-01), Jovis

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