Handheld digital gemstone measurement apparatus

Details Handheld digital gemstone measurement apparatus Handheld digital gemstone measurement apparatus

1988-03-01

1989-07-04

Martin, Jr., William D.

Boots, shoes, and leggings

33504, 33784, 33819, G06F 1532

Patent

active

048456462

ABSTRACT:
A digital gemstone measurement device includes a first caliper jaw fixed to a housing, a second caliper jaw movable relative to the first caliper jaw, an encoding wheel that rotates in response to linear motion of the second caliper jaw, a photosensor for sensing rotation of the encoding wheel and a microcomputer responsive to photosensor output signals for calculating the weight of a gemstone. A slotted rotary encoding wheel provides measurement resolution on the order of 0.01 millimeter. A spring-loaded pneumatic dashpot urges the caliper jaws together relatively slowly so as to avoid snap-action. The gemstone shape is selected from a list, and the weight is calculated from a predetermined formula corresponding to the shape. The device is handheld and includes a keypad for controlling operation and an alphanumeric display for readout of measurement results.

REFERENCES:
patent: 3649820 (1972-03-01), Totsuka et al.
patent: 4035922 (1977-07-01), von Voros
patent: 4205449 (1980-06-01), Waszmer
patent: 4229883 (1980-10-01), Kobashi
patent: 4255861 (1981-03-01), Nakata et al.
patent: 4570349 (1986-02-01), Finkelman et al.
patent: 4612656 (1986-09-01), Suzuki et al.

Affiliated with

Also associated with

Rating

Handheld digital gemstone measurement apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Handheld digital gemstone measurement apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Handheld digital gemstone measurement apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-857543