Fatigue test apparatus

Details Fatigue test apparatus Fatigue test apparatus

1975-07-11

1976-02-10

Myracle, Jerry W.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Content or effect of a constituent of a liquid mixture

73 95, G01N 332

Patent

active

039370712

ABSTRACT:
Four tensional test stations are mounted on a rectangular support frame m up of four channels. Each test station comprises an air cylinder attached to the frame and having a tensioning piston connected to a first specimen holder, a second specimen holder attached to the frame, a solenoid valve connected to each air cylinder, and a test terminate switch closed by the piston and first specimen holder. Current pulses are applied intermittently to each of the four stations by a motor-driven timer switch comprising a fixed contact plate, four spring contacts and a drive shaft having four shaped insulated cams engageable with the four spring contacts to move them into contact with the contact plate in a desired sequence. An electrical elapsed-time indicator is connected in parallel with the solenoid valve and timer switch contacts and in series with the test terminate switch, in each station. Compressed air is supplied from a source through a pressure regulator and a manifold to the inlets of the four solenoid valves. The support frame is partly enclosed by a box cover.

REFERENCES:
patent: 3381526 (1968-05-01), Rastugi et al.
patent: 3793880 (1974-02-01), Sugi et al.

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