Surface micromachined counter-meshing gears discrimination device
Abstract
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.
- Inventors:
-
- Albuquerque, NM
- Issue Date:
- Research Org.:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- OSTI Identifier:
- 873431
- Patent Number(s):
- 6158297
- Application Number:
- 09/104,016
- Assignee:
- Sandia Corporation (Albuquerque, NM)
- Patent Classifications (CPCs):
-
E - FIXED CONSTRUCTIONS E05 - LOCKS E05B - LOCKS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- DOE Contract Number:
- AC04-94AL85000
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- surface; 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; /74/70/359/
Citation Formats
Polosky, Marc A, Garcia, Ernest J, and Allen, James J. Surface micromachined counter-meshing gears discrimination device. United States: N. p., 2000.
Web.
Polosky, Marc A, Garcia, Ernest J, & Allen, James J. Surface micromachined counter-meshing gears discrimination device. United States.
Polosky, Marc A, Garcia, Ernest J, and Allen, James J. Tue .
"Surface micromachined counter-meshing gears discrimination device". United States. https://www.osti.gov/servlets/purl/873431.
@article{osti_873431,
title = {Surface micromachined counter-meshing gears discrimination device},
author = {Polosky, Marc A and Garcia, Ernest J and Allen, James J},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {12}
}