Bicycle Theft increasing - UK film short

Bicycle Theft exploding as does bicycle ownership goes up...
Easy rechargeable seat GPS trackers?

Daniel Westrop given a 6 month suspended sentence for 100+ bicycle thefts
seems a bit light.

http://www.youtube.com/watch?v=rhPzF...eature=related

Per Postman Delivers:
Daniel Westrop given a 6 month suspended sentence for 100+ bicycle thefts
seems a bit light.

http://www.youtube.com/watch?v=rhPzF...eature=related

Sounds like a real slap in the face for the London cops.
--
Pete Cresswell

On 10 Jan 2012 17:08:23 GMT, Postman Delivers
wrote:

Bicycle Theft exploding as does bicycle ownership goes up...
Easy rechargeable seat GPS trackers?

Daniel Westrop given a 6 month suspended sentence for 100+ bicycle thefts
seems a bit light.

http://www.youtube.com/watch?v=rhPzF...eature=related

The problem seems to be epidemic and contageous:
"Police deal with surge of bike thefts in Santa Cruz"
http://www.santacruzsentinel.com/ci_19715876

An explosive device under the saddle, detonated by a garage door
opener remote, might be entertaining. I wonder if a saddle, with
padding and frame pre-sliced for optimum fragmentation, might sell.
Probably too dangerous for bystanders. I guess a mini-nail gun,
pointed up through the saddle, will suffice.

The problem with a GPS tracker, is what are you going to do if you
find the thieves? Are you going to rush in, confront a group of
street scum, grab the bicycle, and try to ride away? I don't think
you're going to make it out the door. You could call the police, who
will confiscate your bicycle as evidence if there's an arrest. Chances
are fairly good that the bicycle will evaporate. That's happening
locally with alarming frequency. Of course, you do carry sufficient
documentation with you to prove that it's really your bicycle.
(Register it with the city and have photographs handy).

--
# Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
# 831-336-2558
# http://802.11junk.com
# http://www.LearnByDestroying.com AE6KS

On 12/01/12 13:47, Jeff Liebermann wrote:
On 10 Jan 2012 17:08:23 GMT, Postman Delivers
wrote:

Bicycle Theft exploding as does bicycle ownership goes up...
Easy rechargeable seat GPS trackers?

Daniel Westrop given a 6 month suspended sentence for 100+ bicycle thefts
seems a bit light.

http://www.youtube.com/watch?v=rhPzF...eature=related

The problem seems to be epidemic and contageous:
"Police deal with surge of bike thefts in Santa Cruz"
http://www.santacruzsentinel.com/ci_19715876

An explosive device under the saddle, detonated by a garage door
opener remote, might be entertaining. I wonder if a saddle, with
padding and frame pre-sliced for optimum fragmentation, might sell.
Probably too dangerous for bystanders. I guess a mini-nail gun,
pointed up through the saddle, will suffice.


If the saddle top could be insulated from the rails, then the use of a
metalised foil on the seat as the return point for an electrified frame
might also prove entertaining.

Trouble is, with so much CFRP and hard anodised Al on the bikes these
days, even electrification wouldn't work in all cases.

But where it does, a 10 - 15 kV jolt from a car coil discharged through
the rectum would, erm, purse their lips ;-)

--
JS.

On Thu, 12 Jan 2012 16:01:08 +1100, James
wrote:

If the saddle top could be insulated from the rails, then the use of a
metalised foil on the seat as the return point for an electrified frame
might also prove entertaining.

That might work, but you would also need to make the rubber bar end
grips more conductive. Also, if you draw an arc through the saddle,
it will probably burn a hole in the seat. It might be awkward to
build such a device on a conventional bicycle, but the motorized
variety have a very convenient power source available to provide the
necessary zap.

Trouble is, with so much CFRP and hard anodised Al on the bikes these
days, even electrification wouldn't work in all cases.

A few thousand volts will blast right through the alodine 1200 plated
aluminum.

But where it does, a 10 - 15 kV jolt from a car coil discharged through
the rectum would, erm, purse their lips ;-)

Yep. However, I'm thinking that the insulated rubber bar end grips
might offer a better opportunity. Delivering the jolt between the
hands will go through the heart, and probably kill the bicycle thief.
If you want to be really evil, use DC instead of AC. That will make
the muscles contract, resulting in a death grip on the grips.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Jeff Liebermann wrote:
On Thu, 12 Jan 2012 16:01:08 +1100,
wrote:

If the saddle top could be insulated from the rails, then the use of a
metalised foil on the seat as the return point for an electrified frame
might also prove entertaining.

That might work, but you would also need to make the rubber bar end
grips more conductive. Also, if you draw an arc through the saddle,
it will probably burn a hole in the seat. It might be awkward to
build such a device on a conventional bicycle, but the motorized
variety have a very convenient power source available to provide the
necessary zap.

Trouble is, with so much CFRP and hard anodised Al on the bikes these
days, even electrification wouldn't work in all cases.

A few thousand volts will blast right through the alodine 1200 plated
aluminum.

But where it does, a 10 - 15 kV jolt from a car coil discharged through
the rectum would, erm, purse their lips ;-)

Yep. However, I'm thinking that the insulated rubber bar end grips
might offer a better opportunity. Delivering the jolt between the
hands will go through the heart, and probably kill the bicycle thief.
If you want to be really evil, use DC instead of AC. That will make
the muscles contract, resulting in a death grip on the grips.

FWIW, I disassembled a cheap old film camera and saved the flash
electronics circuit. I found that the voltage from two AA batteries
gets pumped up to 300 volts in a large capacitor. The circuit probably
weighs less than two ounces.

300 volts properly applied ought to tingle, at least!


--
- Frank Krygowski

On 12/01/12 18:22, Jeff Liebermann wrote:
On Thu, 12 Jan 2012 16:01:08 +1100,
wrote:

If the saddle top could be insulated from the rails, then the use of a
metalised foil on the seat as the return point for an electrified frame
might also prove entertaining.

That might work, but you would also need to make the rubber bar end
grips more conductive.

Throw in a few handfuls of carbon to the rubber mix ;-)

Also, if you draw an arc through the saddle,
it will probably burn a hole in the seat. It might be awkward to
build such a device on a conventional bicycle, but the motorized
variety have a very convenient power source available to provide the
necessary zap.

Trouble is, with so much CFRP and hard anodised Al on the bikes these
days, even electrification wouldn't work in all cases.

A few thousand volts will blast right through the alodine 1200 plated
aluminum.

Alodine is a conductive coating. An anodized Al is non conductive, but
yes, enough voltage will go through.

http://www.finishing.com/448/95.shtml

But where it does, a 10 - 15 kV jolt from a car coil discharged through
the rectum would, erm, purse their lips ;-)

Yep. However, I'm thinking that the insulated rubber bar end grips
might offer a better opportunity. Delivering the jolt between the
hands will go through the heart, and probably kill the bicycle thief.
If you want to be really evil, use DC instead of AC. That will make
the muscles contract, resulting in a death grip on the grips.


I like your thinking. I was just going with the small battery and
automotive coil and relay contacts driven by a 555 timer perhaps. A
crude electric fence. Metalised hand grips would be the go.

--
JS.

On 13/01/12 05:32, Frank Krygowski wrote:
Jeff Liebermann wrote:
On Thu, 12 Jan 2012 16:01:08 +1100,
wrote:

If the saddle top could be insulated from the rails, then the use of a
metalised foil on the seat as the return point for an electrified frame
might also prove entertaining.

That might work, but you would also need to make the rubber bar end
grips more conductive. Also, if you draw an arc through the saddle,
it will probably burn a hole in the seat. It might be awkward to
build such a device on a conventional bicycle, but the motorized
variety have a very convenient power source available to provide the
necessary zap.

Trouble is, with so much CFRP and hard anodised Al on the bikes these
days, even electrification wouldn't work in all cases.

A few thousand volts will blast right through the alodine 1200 plated
aluminum.

But where it does, a 10 - 15 kV jolt from a car coil discharged through
the rectum would, erm, purse their lips ;-)

Yep. However, I'm thinking that the insulated rubber bar end grips
might offer a better opportunity. Delivering the jolt between the
hands will go through the heart, and probably kill the bicycle thief.
If you want to be really evil, use DC instead of AC. That will make
the muscles contract, resulting in a death grip on the grips.

FWIW, I disassembled a cheap old film camera and saved the flash
electronics circuit. I found that the voltage from two AA batteries gets
pumped up to 300 volts in a large capacitor. The circuit probably weighs
less than two ounces.

300 volts properly applied ought to tingle, at least!



300 V through sweaty hands and backside would certainly give you an alert.

The reason they use capacitors in a camera flash is to store a precise
amount of charge (and voltage, q = C V) for an indefinite time, that can
be fired at precisely the moment the shutter is opened.

An ignition coil is less precise in the stored charge department (at
least it was when points were still used). The stored energy grows
while the points are closed, until the flux in the magnetic core is
saturated, and released when the points open and the magnetic field
collapses. Once the core is saturated the current just heats the coil
and wastes power.

The voltage is a little unpredictable, but much higher than 300 V.
Typically thousands of volts. The energy depends on the time the points
are closed, the quality of the magnetic core and the resistance of the
circuit.

--
JS.

On 1/12/2012 1:32 PM, Frank Krygowski wrote:
Jeff Liebermann wrote:
On Thu, 12 Jan 2012 16:01:08 +1100,
wrote:

If the saddle top could be insulated from the rails, then the use of a
metalised foil on the seat as the return point for an electrified frame
might also prove entertaining.

That might work, but you would also need to make the rubber bar end
grips more conductive. Also, if you draw an arc through the saddle,
it will probably burn a hole in the seat. It might be awkward to
build such a device on a conventional bicycle, but the motorized
variety have a very convenient power source available to provide the
necessary zap.

Trouble is, with so much CFRP and hard anodised Al on the bikes these
days, even electrification wouldn't work in all cases.

A few thousand volts will blast right through the alodine 1200 plated
aluminum.

But where it does, a 10 - 15 kV jolt from a car coil discharged through
the rectum would, erm, purse their lips ;-)

Yep. However, I'm thinking that the insulated rubber bar end grips
might offer a better opportunity. Delivering the jolt between the
hands will go through the heart, and probably kill the bicycle thief.
If you want to be really evil, use DC instead of AC. That will make
the muscles contract, resulting in a death grip on the grips.

FWIW, I disassembled a cheap old film camera and saved the flash
electronics circuit. I found that the voltage from two AA batteries gets
pumped up to 300 volts in a large capacitor. The circuit probably weighs
less than two ounces.

300 volts properly applied ought to tingle, at least!



You could, such circuits have been cheaply available for decades. I
think some have been used for motorcycle anti-theft home brews. In
reality, it wouldn't work well enough to actually deter theft, would
risk the accidental shocking of innocents, and expose you to significant
liability if you put a thief into cardiac arrest. Not to mention the
times you'd likely shock yourself.

On 1/12/2012 5:24 PM, James wrote:
On 13/01/12 05:32, Frank Krygowski wrote:
Jeff Liebermann wrote:
On Thu, 12 Jan 2012 16:01:08 +1100,
wrote:

If the saddle top could be insulated from the rails, then the use of a
metalised foil on the seat as the return point for an electrified frame
might also prove entertaining.

That might work, but you would also need to make the rubber bar end
grips more conductive. Also, if you draw an arc through the saddle,
it will probably burn a hole in the seat. It might be awkward to
build such a device on a conventional bicycle, but the motorized
variety have a very convenient power source available to provide the
necessary zap.

Trouble is, with so much CFRP and hard anodised Al on the bikes these
days, even electrification wouldn't work in all cases.

A few thousand volts will blast right through the alodine 1200 plated
aluminum.

But where it does, a 10 - 15 kV jolt from a car coil discharged through
the rectum would, erm, purse their lips ;-)

Yep. However, I'm thinking that the insulated rubber bar end grips
might offer a better opportunity. Delivering the jolt between the
hands will go through the heart, and probably kill the bicycle thief.
If you want to be really evil, use DC instead of AC. That will make
the muscles contract, resulting in a death grip on the grips.

FWIW, I disassembled a cheap old film camera and saved the flash
electronics circuit. I found that the voltage from two AA batteries gets
pumped up to 300 volts in a large capacitor. The circuit probably weighs
less than two ounces.

300 volts properly applied ought to tingle, at least!



300 V through sweaty hands and backside would certainly give you an alert.

The reason they use capacitors in a camera flash is to store a precise
amount of charge (and voltage, q = C V) for an indefinite time, that can
be fired at precisely the moment the shutter is opened.

An ignition coil is less precise in the stored charge department (at
least it was when points were still used). The stored energy grows while
the points are closed, until the flux in the magnetic core is saturated,
and released when the points open and the magnetic field collapses. Once
the core is saturated the current just heats the coil and wastes power.

The voltage is a little unpredictable, but much higher than 300 V.
Typically thousands of volts. The energy depends on the time the points
are closed, the quality of the magnetic core and the resistance of the
circuit.


Almost all modern ignitions use a charged capacitor discharging through
the ignition coil. The switching is done with a solid state device.