Patent Magnetic Bank and Safe Locks
Submitted to the Library of Congress in 1870.
Includes lock prices, patent dates, design explanations and safe lock and dial diagrams.
PDF file here, some pages appear empty, not sure if that is intentional.
https://ia801606.us.archive.org/0/items/jamessargentsdes00sarg/jamessargentsdes00sarg.pdf
Excerpt from the document:
Excerpt from the document wrote:It consists of three combination wheels, all revolving on one stud. Each of these wheels has a single slot, or notch, in its edge,
and when these are all brought into line (which is done when the combination is known, by means of a knob on the outside of the door)
the bolt may be thrown.
Over these wheels is a lever (or dog,) which when they are all set right, falls into the slots, and releases the bolt.
The lever does not rest on the wheels, nor is it brought to them by a spring or cam, as in most other Locks, but is held ABOVE THEM BY A POWERFUL MAGNET.
Every time the knob is turned round the Magnet is separated from the Lever, (by means of a roller on the cam) which then falls
to the wheels, and if the Bolts are all right drops into them, thus releasing the Bolt.
The operation of the Magnet in this manner shuts off entirely the use of the Micrometer, an instrument recently applied to picking Locks, a brief description of which may be found on page 47.
The MAGNETIC LOCK presents a perfect barrier to the operation of this instrument, which can never indicate the position of
the slots, unless there is a positive connection with the outside, when the tumbler and wheels are in contact, This connection has,
necessarily, to be made in all locks, except the MAGNETIC, in order to control the movements of the tumbler.
Enjoy!
Squelchtone
