VIII Flashcards
(37 cards)
- This used to determine the similarities and dissimilarities of evidence and test evidence.
Bullet Comparison Microscope
- 1st to own-bullet Comparison Microscope in 1925.
He is also the Father of Modern Ballistics.
“Colonel Calvin H. Goddard”
The user of this is able to simultaneously view, observe, and compare markings on different samples in split view
Bullet Comparison Microscope
- half of evidence & test bullet is projected:
a. at the same time - clock postions
b. at the same direction - left or right
c. at the same magnification - the same size when viewed (small vs small; bigger vs bigger)
d. at the same image - landmarks vs landmarks
e. at the same level or plane - refers to height or elevation of stage plate.
Intermarriage
it looks for similarities
Intermarriage
it looks for contrast or differences
Juxtaposition
- the critical side by side examination of evidence and testbullet/shell. Juxtapose means putting two things together to emphasize their contrastbetween them.
Juxtaposition
- This is used in preliminary examinations of fired bullets, shells. It is used also in close-up examination of tampered serial number of firearms.
Stereoscopic Microscope
AKA Dissecting Microscope
Stereoscopic Microscope
It can provide 3D view of samples
Stereoscopic Microscope
(1671) - a French scientific instrument maker who invented the first stereoscopic style Microscope with two eyepieces in 1671.
optical instruments and telescope
Cherubin d’Orleans
(1890) - He introduced a novel design that led him to become the forefather of Modern Stereoscope.
Honorato S. Greebough
(19TH) - He designed the first successfulstereomicroscope. This was introduced in US and was named Cycloptic in 1957.
Francis Herbert Wenham
- This instrument is similar with the Comparison Microscope but this equipment is capable of comparing two fired bullets and shells with a large screen.
Projected with images/visually
Comparison Projector 6 (CP-6)
Who invent Comparison Projector 6?
William Howard Livens
- This is 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
Can safely fired firearms without damaging them ( preserving critical markings for analysis)
can be in form of Rubber and Cotton
Bullet Recovery Box
- This is used in determining the width of lands, width of grooves, diameter and twist of fired bullet
kaya imeasure yung fine details
Measuring Projector 6 (MP-6)
- Generally, it is used to know the caliber of firearms, bullet and shell.
can be manual or digital
it is used to determine the;
a. Bullet Diameter
b. Rim diameter
c. Shell mouth diameter
d. Bore diameter
e. Shell Length
f. Barrel length
Caliper
This instrument is used to measure small things and small distances. (small samples/dimensions)
This is an enhancement of the Vernier Caliper. William Gascone (17th) is considered the first inventor.
Micrometer (C-clamp like)
- This is used to determines the weight of fired bullet, shots or pellets to know its caliber, type and make of firearm used.Measurements are expressed in Grains or Grams.Take Note: if bullet is shaved, it must be noted for its weight will differ from standard.
Analytical or Torsion Balance
First inventor of micrometer
William Gascone
- It is used to determine the bore diameter of firearms or caliber. In comparison, Ring measurer is used in determining the right measurement for wedding, graduation and personalized rings.
Taper Gauge
- This is a Small instrument used in the examination of the interior 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
