Optics: measuring and testing – By configuration comparison
Patent
1995-01-03
1997-08-05
Evans, F. L.
Optics: measuring and testing
By configuration comparison
356394, 359387, G01B 1100
Patent
active
056548010
ABSTRACT:
The apparatus has a fired cartridge mounting device for holding the cartridge substantially aligned with a longitudinal axis with a primer surface of the cartridge substantially perpendicular to the axis, a cartridge microscope mounted with its optical axis substantially parallel to the longitudinal axis, a focusing mechanism for focusing the microscope to image a breech face impression on the primer surface and a firing pin impression surface in the primer surface, and an axisymmetric light source mounted to project axially symmetric light onto the breech face impression and the firing pin impression surface about the longitudinal axis. Images of the breech face and the firing pin impressions can be used for comparative analysis independently of an angular orientation of the cartridge held by the mounting device. During this analysis, a first image from a test cartridge and a second image from a computer data bank are rotated relative to one another, and a maximum correlation value for the rotated first and second images is obtained.
REFERENCES:
patent: 2286430 (1942-06-01), Minton et al.
patent: 3780614 (1973-12-01), Maier
patent: 5379106 (1995-01-01), Baldur
patent: 5390108 (1995-02-01), Baldur et al.
Leica Article--published in Jan. 1996 Issue of AFTE Journal, vol. 28, No. 1, entitled "LEICA DM-C Comparison Macroscope".
Leica Brochure--"Leica Microscopy and Scientific Instruments Group"--DAS Macroscope Leica DM-C--publication date unknown.
Drugfire System Overview--Brochure of FBI Laboratory (undated).
"FBI's Drugfire"--Technology Profile by Keith W. Strandberg, Law Enforcement Technology, Apr. 1994.
"FBI DrugFire Tests in Baltimore Pick up Weapons Matches"--The Sun, Thursday, Oct. 21, 1993, vol. 313, No. 136.
"Computer System Links Guns to Crimes using `Fingerprints`", Florida/Metro-3--Tampa Tribune, Mon. Jan. 17, 1994, p. 1B (Metro Section).
"New FBI Program Targts Firearms" by Pierre Thomas, The Washington Post, (undated).
"Targeting the Repetitive Use of Guns in Gang and Drug Related Shootings", DrugFire, Orange County Sheriff-Coroner Department, Jan. 11, 1994/vol. 1.
"Ballistics Boon for PG", by Brian Reilly, Maryland News, Thursday May 6, 1994.
The FBI Drugfire Program, Brochure (undated).
Federal Bureau of Investigation Drugfire, Brochure of FBI Laboratory (undated).
"Firearms Investigation, Identification and Evidence" by Hatcher, Jury & Weller from R. Thompson, BATF Lab, San Francisco Lab Center, pp. 382-391.
"Byte the Bullet"--Montreal Gazette, Article of Monday, Jan. 30, 1995, pp. 3 and 4.
Evans F. L.
Forensic Technology (Wai) Inc.
LandOfFree
Fired cartridge examination method and imaging 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 Fired cartridge examination method and imaging apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fired cartridge examination method and imaging apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1078726