System for testing firmness

Details System for testing firmness System for testing firmness

1977-12-27

1979-02-20

Myracle, Jerry W.

Measuring and testing

Hardness

73806, 73161, G01N 340

Patent

active

041400089

ABSTRACT:
A system for measuring or testing the firmness of a resilient object such as a mattress. A pressure applying platen or the like is driven by a motor into the object, and the pressure applied is measured through the utilization of a pressure sensitive transducer or the like. This generates electrical power proportional to the pressure, and a recorder displays information to provide a reading of the power generated. The generating means is also connected to control means for the motor, and a threshold circuit or the like is adapted to shut off and reverse the motor when the power generated reaches a predetermined level.

REFERENCES:
patent: 2930943 (1960-03-01), Ruge
patent: 3195347 (1965-07-01), Janapol
patent: 3285065 (1966-11-01), Ragen et al.

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