Fingerprint exam

arbitrary type tented arch

has two equally good loop formations, going in the opposite directions, and one delta

Recurving tented arch-loop type

having two of the three characteristics of the loop. In other words a recurving tented arch must lack one of the three basic characteristics of a loop. (delta-recurve-ridge count)

meeting

if there are on or two ridges either inside or outside the right delta , or if the tracing stops on the right delta itself.

inner

if there are three or more ridges inside the right delta

outside

if there are three or more ridges outside the right delta

Major

is just about the thumbs. if there is a RAT in a thumb we have no major. X-place a x. determine the value of the number six finger first. if number 6 has a value of 17 or more ridge counts then use the second set of values for #1 classification.

Key

is taken rom the ridge count of the first loop beginning with the right thumb. do not look at pinkies. if there isn't a ridge count on the first finger keep going until you find one. The key is always placed above the classification line regardless of the number used.

plain arch

is that type of pattern in which the ridges enter upon one side make a rise or wave in the center and flow or tend to flow out on the opposite side. B. Plain arch cannot have a looping ridge, an upthrust, or a recurve

secondary

is the type of pattern found in the index fingers pos 2&7 (pos2/pos7) numerator/denominator

sub secondary

is the value of the ridge count on the tracings of numbers 2,3,4num 7,8,9denom the fingers used to show three! used cheat sheet to show ridge count

arches def

possesses an angle, an up thrust, or two of the three basic characteristics, of a loop.

small letter group

prints in which an arch, tented arch, or radial loop appear are labeled as such in other than the index finger positions finding a R/A/T in other than the index fingers eliminates the sub secondary classifications. mark (X) for sub secondary --- is a spacer for something that isn't there. rW2at W

ulnar loop-NCIC

regular ridge count

three basic characteristics of a loop

sufficient recurve delta ridge count of atleast 1

Radial loop-NCIC

2 numbers. Determine actual ridge count and add fifty (50).

angular type-tented arch

A. Formed by two ridges meeting at an angle. One continuous ridge cannot form an angle. B. Angle must be 90 degrees or less.

upthrust type-tented arch

A. an upthrust must be an ending ridge- a ridge which ends in space. B. An upthrust must make a definite change of directin from the base bridge. The upthrust must angle 45 degrees or more from the base ridge. The base ridge is the plain arch ridge directly beneath the ridge in question.

whorl symbols

P----Plain whorl C---- central pocket whorl D---- double loop whorl X----- accidental whorl

central pocket loop whorl

a central pocket loop whorl consist of atleast one circular ridge with two deltas, between which, when an imaginary line is drawn no recurving ridge within the inner pattern are is cut or touched.

plain whorl

a plain whorl consists of one or more ridges which make or tend to make a complete circuit, with two deltas, between which, when an imaginary line is drawn, at least one recurving ridge within the inner pattern is cut or touched. an imaginary line drawn from delta to delta must cut or touch atleast one recurving ridge within the inner pattern area.

tented arch

a tented arch is that type of pattern which possesses either an angle, an upthrust, or two of the three characteristics of the loop,

plain and tented arch classification

a-plain arch A-plain arch in pos 2&7 t-tented arch T-tented arch in pos 2&7

difference between a plain whorl or central pocket whorl

an imaginary line drawn from delta to delta must not cut or touch a recurving ridge in a central pocket whorl but must touch in a plain whorl.

accidental whorl

consist of a combination of two different types of patterns with the exception of the plain arch, with two or more deltas or a pattern which possesses some of the requirements for two or more different types of a pattern which conforms to none of the def. 3 deltas = accidental

double loop whorl

consists of two separate loop formations with two separate and distinct sets of shoulders and two deltas.

Final

the final is taken from the number five finger if it is a loop either ulnar or radial. if number five is not a loop the final is taken from number ten finger. If neither five nor ten is a loop then there is no final. if the key is taken from number 5 it is on the num line if the key is taken from number 10 it is on the denom line if all ten fingers are whorls then number five is brough up to the key classification as a (W)-horl. count the whorl like an ulnar loop. count from farthest delta to the core.

whorls

the minimum requirements are two deltas and a recurve in front of each. spiral,oval,circular or a variant of each

Arches

two types tented and plain

primary classification system

whorl type patterns as they appear in the various fingers. when you get a whorl you add the number of the box associated with it. 246810 go in the numerator as even 13579 go in the denominator as odd +1 in the num +1 in the denom