MIT Guide to Lock Picking by Ted the Tool - HTML preview

Chapter

4

Basic

Pic

king

&

The

Binding

Defect

The

atland

mo

del

highlights

the

basic

defect

that

enables

lo ck

pic

king

to

w

ork.

This

defect

makes

it

p ossible

to

op en

a

lo ck

by

lifting

the

pins

one

at

a

time,

and

thus

you

don't

need

a

key

to

lift

all

the

pins

at

the

same

time.

Figure

4.3

sho

ws

ho

w

the

pins

of

a

lo ck

can

b e

set

one

at

a

time.

The

rst

step

of

the

pro cedure

is

to

apply

a

sheer

force

to

the

lo ck

b

y

pushing

on

the

b

ottom

plate.

This

force

causes

one

or

more

of

the

pins

to

b

e

scissored

b etw

een

the

top

and

b

ottom

plate.

The

most

common

defect

in

a

lo

c

k

is

that

only

one

pin

will

bind.

Figure

4.3a

sho

ws

the

left

pin

binding.

Even

though

a

pin

is

binding,

it

can

b e

pushed

up

with

a

pic

king

to ol,

see

Figure

4.3b.

When

the

top

of

the

k

ey

pin

reaches

the

sheer

line,

the

b ottom

plate

will

slide

slightly

.

If

the

pick

is

remov

ed,

the

driver

pin

will

b

e

held

up

by

the

o

v

erlapping

b ottom

plate,

and

the

k

ey

pin

will

drop

do

wn

to

its

initial

p osition,

see

Figure

4.3c.

The

slight

mo

v

emen

t

of

the

b

ottom

plate

causes

a

new

pin

to

bind.

The

same

pro cedure

can

b e

used

to

set

the

new

pin.

Thus,

the

pro cedure

for

one

pin

at

a

time

picking

a

lo

c

k

is

to

apply

a

sheer

force,

nd

the

pin

which

is

binding

the

most,

and

push

it

up.

When

the

top

of

the

k

ey

pin

reaches

the

sheer

line,

the

moving

p

ortion

of

the

lo ck

will

give

slightly

,

and

driv

er

pin

will

b

e

trapp ed

ab ov

e

the

sheer

line.

This

is

called

setting

a

pin.