Surface micromachined counter-meshing gears discrimination device
- Albuquerque, NM
A surface micromachined Counter-Meshing Gears (CMG) discrimination device which functions as a mechanically coded lock. Each of two CMG has a first portion of its perimeter devoted to continuous driving teeth that mesh with respective pinion gears. Each EMG also has a second portion of its perimeter devoted to regularly spaced discrimination gear teeth that extend outwardly on at least one of three levels of the CMG. The discrimination gear teeth are designed so as to pass each other without interference only if the correct sequence of partial rotations of the CMG occurs in response to a coded series of rotations from the pinion gears. A 24 bit code is normally input to unlock the device. Once unlocked, the device provides a path for an energy or information signal to pass through the device. The device is designed to immediately lock up if any portion of the 24 bit code is incorrect.
- Research Organization:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- DOE Contract Number:
- AC04-94AL85000
- Assignee:
- Sandia Corporation (Albuquerque, NM)
- Patent Number(s):
- US 6158297
- Application Number:
- 09/104,016
- OSTI ID:
- 873431
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
micromachined
counter-meshing
gears
discrimination
device
cmg
functions
mechanically
coded
lock
portion
perimeter
devoted
continuous
driving
teeth
mesh
respective
pinion
emg
regularly
spaced
gear
extend
outwardly
levels
designed
pass
interference
correct
sequence
partial
rotations
occurs
response
series
24
bit
code
normally
input
unlock
unlocked
provides
path
energy
information
signal
immediately
incorrect
information signal
gear teeth
device provides
regularly spaced
micromachined counter-meshing
surface micromachined
coded lock
discrimination device
counter-meshing gears
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