Weighing scales – Load holder – Pivotally interconnected transmission levers
Patent
1978-11-20
1980-02-19
Hartary, Joseph W.
Weighing scales
Load holder
Pivotally interconnected transmission levers
177DIG9, G01G 2102
Patent
active
041890183
ABSTRACT:
A platform weighing scale having a transducer with a movable element to translate weight responsive platform motion into a weight responsive electrical signal and in which the platform is movably supported relative a scale base by one or more pulley and tape motion linkages which also actuate the transducer element. The improved pulley and tape motion linkage comprising a pulley-like element having diametrically opposite peripheral circular sectors, a tape contacting the circular sectors and connected between the platform and base, a pair of restraining elements sandwiching the pulley-like element for a composite rotary and linear motion between parallel surfaces with the circular sectors contacting the parallel surfaces, an arm fixedly coupled to the pulley-like element at its center of rotation by which a remote segment of the arm follows an amplified composite linear and rotary motion, a second pulley-like element fixed to the remote segment of the arm and having a peripheral circular sector having the same center of rotation as the first pulley-like element, and a second tape contacting the second circular sector and connected between the arm and the movable element of the transducer.
REFERENCES:
patent: 2736549 (1956-02-01), Paul
patent: 3938603 (1976-02-01), Shoberg
patent: 4023634 (1977-05-01), Provi
patent: 4050532 (1977-09-01), Provi
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