CRIME LABORATORY EQUIPMENT Flashcards
determine SIMILARITIES and DISSIMILARITIES of evidence and test evidence
Bullet Comparison Microscope
Two positions in comparing evidence and test bullet
Intermarriage
Juxtaposition
Half evidence and test bullet is projected
Intermarriage
At the same time?
At the same direction?
At the same magnification?
At the same image?
At the same level or plane
clock positions
left or right
same size when viewed
landmarks vs landmarks
refers to the height or elevation of stage plate
the critical SIDE by SIDE EXAMINATION of evidence and test bullet/shell.
Juxtaposition
Putting two things TOGETHER to emphasize their contrast between them.
Juxtapose
used in the PRELIMINARY EXAMINATION of fired bullets, and shells.
Stereoscopic microscope
CLOSE-UP EXAMINATION of tampered serial nos. of FAS
Stereoscopic microscope
here the LOCATION OF EXTRACTOR MARKS AND EJECTOR MARKS
Stereoscopic microscope
__________invented the FIRST Stereoscopic-style microscope with TWO EYEPIECES in_____
Cherubin d’ Oreans
1671
_______ introduce a “NOVEL” design that led him to become the FOREFATHER OF MODERN Stereoscope.
Honorato S. Greenough 1890
__________designed the FIRST SUCCESSFUL STEREOMICROSCOPE.
Introduced in US and was named ________ in _________.?
Francis Herbert Wenham (19th) of London
CYCLOPTIC
1957
Similar with the comparison microscope
Comparison projector 6 (CP-6)
Capable of comparing TWO FIRED BULLETS and SHELLS with a LARGE SCREEN.
Comparison projector 6 (CP-6)
_________ engineer and British army and inventor of Comparison projector 6 (CP-6)
William Howard Livens
used in TEST FIRING to acquire test shells and bullets for comparison.
The same caliber or brand of ammunition should be used and manufactured in the same year.
Bullet recovery box
Original Design (Square)
1. Length = 8ft or 96 in
2. 1ft or 12 x12 in on each side
3. ¼ inc thick = side
4. 1/8 in thick = tip
Modern Design (Tube)
A. Length = 92 inches
B. Diameter of body = 18 inches
C. Thickness of iron used = 1/8 inch
D. Frontal ring = 20 inches
Used in determining the WIDTH OF LANDS, the WIDTH OF GROOVES, and the diameter, and TWIST of a fired bullet.
Measuring Projector 6 (MP-6)
used to know the CALIBER of FA, bullet, and shell.
Caliper
Caliper is used to determine the: BRSBSB
Aside from use of determining the Caliber of FA, bullet, shell and ammo.
- Bullet diameter
- Rim diameter
- Shell mouth diameter
- Bore diameter
- Shell length
- Bore length
similar in use with Caliper.
Micrometer (C-clamp like)
used to measure SMALL things and
small distances. This is an ENHANCEMENT of the Vernier Caliper.
Micrometer (C-clamp like)
______ inventor of Micrometer (C-clamp like)
William Gascoine (17th)
_________inventor of PALMER, which is used in measuring HANDHELD OBJECTS. It was introduced in Spain and was called Tornillo de Palmer.
Jean Laurent Palmer (1848-France)
Determines the WEIGHT of fired bullet, shots/pellets to know its caliber, type and make of FA used.
Analytical or Torsion balance
Measurements are expressed in GRAINS OR GRAMS
Analytical or Torsion balance
used to determine the BORE diameter of FA or Caliber.
Taper Gauge
used in determining the right measurement for wedding, graduation and personalized rings.
Ring measurer
a SMALL instrument used in the examination of the INFERIOR SURFACE OF BARREL.
It has tiny lamp at its end and is being inserted in the barrel
TO DETECT IRREGULARITIES AND IMPERFECTIONS, ROUGHNESS AND SCRATCHES.
Onoscope
measures PITCH OF RIFLING, which refers to a complete turn (360°) of a bullet inside the barrel.
measures the angle of TWIST of rifling, either pistol or revolver barrel.
Procedure: This instrument is used by inserting the telescope and aligning it with the axis of the
bore.
Helixometer
measures the SPEED of the bullet or muzzle velocity of the bullet.
Chronograph
_______ inventor of CHRONOGRAPH?
Alfred Lee Loomis (1918)
not much was not reliable/accurate
Boulenge Chronograph
used in MARKING fired bullets, shells and FAs submitted for examination.
This is being plug to a female outlet.
Used only when there is power supply.
Electric gun marker
used in ORIENTATION/PRELIMINARY examination of fired bullets and shells with the use of series of microscopic lenses of different magnifications.
Shadowgraph
contains a LARGE CIRCULAR GROUND GLASS that is about 14 in where the observation and comparison of the characteristics is done. This can
also take PHOTOMICROGRAPHS.
Shadowgraph
a pointed instrument used to mark:
- fired bullets
- fired shells
- Firearms
- Metallic fragments
This must be solid and harder metal than the evidence to be marked.
This is used in manually engraving the initials and date.
Stylus
Integrated Ballistics Identification System
a MECHANICAL TRIGGER pull trigger tester
Trigger pull gauge
used to handle bullets
Tweezers
OPTICAL DEVICE consisting of a rigid flexible tube with an eyepiece on one end, an objective lens on the other linked together by a relay optical system in between.
Borescope
calculate the drag coefficient of the bullet.
determining the Supersonic speed of bullet.
Wind funnel
used to photograph projectile in flight.
Stroboscope
ENABLES to determine the speed, position of bullet and shock waves the projectile produces.
Stroboscope
______ inventor of Stroboscope an AMERICAN ENGINEER
Horod Eugene Edgerton
used primarily in the laboratory in MARKING METAL EVIDENCE.
Electric gun marker
used to drill deep accurate holes.
Gun drills/ Deep hole drills.
