Balance mechanism

Details Balance mechanism Balance mechanism

1976-11-26

1978-01-10

Miller, Jr., George H.

Weighing scales

Self-positioning

Electrical current generating or modifying

177212, 177246, 177255, 177DIG9, G01G 314, G01G 138, G01G 118, G01G 2124

Patent

active

040674088

ABSTRACT:
A balance mechanism for automatically lifting known weights in a single-arm balance comprised of two plates, a first plate supporting the known weights and a pan for an unknown mass to be weighed and a second counterbalancing plate coupled to the first through a box lever having diagonal corners connected to a support member through flexible elements that will permit the box lever to pivot about a diagonal axis in response to a vertical force at one free corner connected to a corner of one balance plate or in response to a vertical force at the other free corner connected to a corner of the other balance plate. One balance plate is secured in space by two taut rectangular loop lines, one line being connected taut to diagonally opposite corners of the plate and to elements affixed to the support member in a position over the free corners of the plate, and the other line being connected taut to the free corners of the plate and to elements affixed to the support member in a position over the other two corners. The other balance plate is secured in space parallel to the first plate in the same manner as the first plate by two taut rectangular loop lines, but relative to the first plate as the support member and oriented 90.degree. from the first plate about an axis normal to the plates. Any force on one plate is coupled to the other plate by the box lever to cause the plates to move in opposite directions while the two pairs of taut lines maintain the plates substantially parallel regardless of whether or not the plates are horizontal or the force is normal to the plates.

REFERENCES:
patent: 3635298 (1972-01-01), Kistler
patent: 3734218 (1973-05-01), Kupper
patent: 3986571 (1976-10-01), Strobel et al.

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