User`s guide

18 | P a g e
L-2 Safety Issues and Solution
A major issue with the locking mechanism is safety. Because there is no other way to
remove the cable from the lock housing the cable would be removed using the key from the
cylinder and then wound around the bottle and secured back into the key cylinder. This presents
the concern that the cable may get stuck in, or wrapped up in either the spokes of the tires or the
sprockets of the bicycle. Either of these presents a danger to the user of causing an accident, or
damaging the bicycle itself. In order to prevent this; a solution has been presented that was not
incorporated into the prototype. The solution to this issue is rather simple in that the electrical
locking mechanism would need to be redesigned slightly to incorporate a second key cylinder
into it. This would allow the removal of the cable from the DLA cylinder that is otherwise not
possible without a charged battery.
L-3 Cost to Implement Prototype
Lock
Parts list prototype
#
Vendor
cost
Aluminum Casing
1
Radioshack
$3.49
Door lock Actuator
1
$20.00
10 ohm 10 Watt resistors
4
Radioshack
$1.19
3/4"X5" galvanized Nipple
1
Ace Hardware
$2.49
flat steel scrap (from original clamp design)
1
Ace Hardware
$14.99
hose clamps size 24
2
Ace Hardware
$2.72
1 ft hose
1
Ace Hardware
$1.79
misc screws/rivets
1
Ace Hardware
$2.49
springs
2
Ace Hardware
$1.00
Total
$50.16
Table L- 1 Breakdown of Cost for Locking Mechanism
L-4 Time to Implement Prototype
1 week for obtaining materials and equipment
2-3 weeks for design of entire locking mechanism
2-3 weeks for construction of entire locking mechanism
2-3 weeks for testing, trouble shooting, and alteration of locking mechanism system and design