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Ballistics > Chapter 9 > Flashcards

Chapter 9 Flashcards

1
Q

This used to determine the similarities and dissimilarities of evidence and test evidence.

A

Bullet Comparison Microscope

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2
Q

1st to own Bullet Comparison Microscope in 1925. He is also the Father of Modern Ballistics.

A

Col. Calvin H. Goddard, MD

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3
Q

half of evidence & test bullet is projected:

A

Intermarriage

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4
Q

Clock positions

A

At the same time

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5
Q

– Left or right

A

At the same direction

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6
Q

– the same size when viewed (small vs small; bigger vs bigger)

A

At the same magnification

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7
Q

landmarks vs. landmarks

A

At the same image

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8
Q

refers to height or elevation of stage plate.

A

At the same level or plane

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9
Q

the critical side by side examination of evidence and test bullet/shell.

A

Juxtaposition –

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10
Q

means putting two things together to emphasize their contrast between them.

A

Juxtapose

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11
Q

Used in preliminary examinations of fired bullets, shells.
​

A

Stereoscopic Microscope

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12
Q

Used also in close-up examination of tampered serial nos. of FAs.
​

A

Stereoscopic Microscope

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13
Q

Here the location of extractor marks and ejector marks.

A

Stereoscopic Microscope

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14
Q

– invented the first Stereoscopic-Style Microscope with two eyepieces in 1671.

A

Cherubin d’Oreans (1671)

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15
Q

introduced a “novel” design that led him to become the Forefather of of Modern Stereoscope.

A

b. Honorato S. Greenough (1890) –

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16
Q

– designed the first successful stereomicroscope. This was introduced in US and was named Cycloptic in 1957.

A

c. Francis Herbert Wenham (19th) of London

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17
Q

Similar with the Comparison Microscope. BUT this equipment is capable of comparing two fired bullets and shells with a large screen.

A

Comparison Projector 6 (CP-6)

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18
Q

Inventor of CP-6

A

William Howard Livens

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19
Q

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.

A

Bullet Recovery Box

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20
Q

Used in determining the width of lands, width of grooves, diameter and twist of fired bullet.

A

Measuring Projector 6 (MP-6)
​

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21
Q

Generally, used to know the caliber of FA, bullet and shell.

A

Caliper
​

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22
Q

– similar in use with Caliper.

A

Micrometer (C-clamp like)

23
Q

was derived from Greek words Micros (small) and Metron (to measure)

A

Micrometer

24
Q

This instrument then is used to measure small things and small distances.

A

Micrometer (C-clamp like)

25
Q

This is an enhancement of the Vernier Caliper.

A

Micrometer (C-clamp like)

26
Q

– first ever inventor of Micrometer

A

William Gascoine (17th)

27
Q

inventor of Palmer, which is used in measuring handheld objects. It was introduced in Spain and was called Tornillo de Palmer.

A

Jean Laurent Palmer (1848-France) –

28
Q

Determines the weight of fired bullet, shots/pellets to know its caliber, type and make of FA used.
​

A

Analytical or Torsion Balance
​

29
Q

Measurements are expressed in ___ or ___.

A

Grains or grams

30
Q

used to determine the bore diameter of FA or Caliber.

A

Taper Gauge
​

31
Q

This is a small instrument used in the examination of the interior surface of barrel.

A

Onoscope
​

32
Q

It has tiny lamp at its end and is being inserted in the barrel to detect irregularities and imperfections, roughness and scratches.

A

Onoscope

33
Q

This measures Pitch of Rifling, which refers to a complete turn (360°) of a bullet inside the barrel.

A

Helixometer

34
Q

It also measures the angle of twist of rifling, either pistol or revolver barrel.
​

A

Helixometer

35
Q

Procedure: This instrument is used by inserting the telescope and aligning it with the axis of the bore.

A

Helixometer

36
Q

This measures the speed the bullet or muzzle velocity of the bullet.

A

Chronograph

​

37
Q

Inventor of Chronograph

A

Alfred Lee Loomis (1918) –

38
Q

Was sctually invented prior chronograph but was not much reliable/accurate.

A

Boulenge Chronograph

39
Q

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.

A

Electric Gun Marker –

40
Q

used in orientation/preliminary examination of fired bullets and shells with the use of series of microscopic lenses of different magnifications.

A

Shadowgraph –

41
Q

This instrument contains a large circular ground glass that is about 14 in where the observation and comparison of the characteristics is done.

A

Shadowgraph

42
Q

This can also take photomicrographs.

A

Shadowgraph

43
Q

a pointed instrument used to mark:
1. fired bullets
2. fired shells
3. Firearms
4. Metallic fragments

A

Stylus –

44
Q

This must be solid and harder metal than the evidence to be marked.

A

Stylus

45
Q

This is used in manually engraving the initials and date.

A

Stylus

46
Q

Lmao idk nothing written here

A

Integrated Ballistics Identification System

47
Q

– a mechanical trigger pull trigger tester

A

Trigger pull gauge

48
Q

used to handle bullets

A
  1. Tweezers –
49
Q

an 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.

A

Borescope –

50
Q

– used to calculate the drag coefficient of the bullet. This is capable of determining the supersonic speed of bullet.

A
  1. Wind funnel
51
Q

used to photograph projectile in flight. This enables to determine the speed, position of bullet and shock waves the projectile produces. Invented by an American Engineer Horod Eugene Edgerton

A
  1. Stroboscope
52
Q

used primarily in the laboratory in marking metal evidence.

A
  1. Electric Gun Marker –
53
Q

used to drill deep accurate holes.

A
  1. Gun drills/ Deep hole drills –

Ballistics (3 decks)

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