A New or Improved Cryptographical Instrument.
Year: 1891

page_text: Date of Application, 3rd July, 1891
Complete Specification Left, 4th Apr., 1892-Accepted, 14th May, 1892
PROVISIONAL
SPECIFICATION.
A New or Improved Cryptographical Instrument.
I ETIENNE BAZERIES of Nantes in the Republic of France do hereby declare
the nature of this invention to be as follows:-
This invention relates to portable instruments for writing or giving communi-
cations in cypher. It consists of an outer cylindrical body or chamber fitted with
a disc carrying cyphers or devices, at one end, and a slotted aperture along its
length, said body having a tube journalled therein so as to be capable of rotation
said tube being furnished with a slotted aperture and on its exterior surface with
cyphers or devices, and carrying movable rings therein having cyphers or devices
on their outer surfaces and formed with slots or teeth on their inner surfaces
through which a rod is passed to secure the rings in any desired position and their
devices in line at the slotted apertures in the body and tube. A fixing disc is also
provided to secure the rings and rod in place and thus clamp the cypher. The
whole can be placed in a convenient case furnished with compartments for holding
the desired number of cypher rings or other parts.
Dated this 3rd day of July 1891.
HERBERT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
A New or Improved Cryptographical Instrument.
1, ETIENNE BAZERIES of Nantes in the Republic of France, Manufacturer do
hereby declare the nature of this invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement :-
Reference being made to the annexed drawings,
Fig. 1 is a side elevation of the body of the cryptographical instrument consisting
of a tube C of considerable diameter having at one end a fixed disk F provided on
its periphery with a series of numbers. The other end of the said tube C is screw
threaded to receive a disk or collar D screwed thereon and preferably milled around
its periphery. A slotted bar E which by its slot forms a window for the purpose
hereinafter described is fixed in the disk F at one end and extends parallel to the
cylinder C but at a distance therefrom, and its free end is suitably engaged by the
disk. D.
Fig. 2 is an end view of this device with collar or disk D removed.
Fig. 3 is an edge view and Fig. 4 is a side elevation of one of a number of rings
having each on its periphery alphabetical signs, punctuation marks, numerical signs
and the like and having on its inner side a number of recesses u, one corresponding
to each sign on the periphery. These rings s are intended to be threaded on the
tube C, a suitable number of them for instance fifteen, the collar D having been
previously unscrewed. The rings can then be shifted at will on the tube C each
being revolvable independently of the others.
Fig. 5 shows a rod H with knob at one end screw threaded as shown although
this is not essential. The rod H may be passed through a hole H¹ in the disk F
and will pass and lie in one of the recesses in each ring so that when the said rod
is inserted it locks all the rings & in such positions as have been given them. If the
head of the rod H is screw threaded, the hole H' is screw threaded so that when
the rod is nearly inserted it may be screwed in and cannot accidentally fall out.
Fig. 6 shows the whole device as fitted in a leather case A. This case has annular
Price RdT

page_text: partitions B B B B fixed to it and in mounting the device when putting it away
in the case these partitions are threaded at intervals in the tube C between some of
the rings & as shown.
The apparatus is used as follows;-
on for
To construct a cryptograph the writer must be acquainted with a key word, any
and may be
ent.' There being fifteen rings each beating
on its edge a number from 1 to 15, the key word is written until fifteen letters are
on thic paper; thus ;-
ՁԵՐ ՊԱՆԵԵՒ
DOATING
on its edge a number from 1 to 15, the key word is written until fifteen letters are
on tlic paper; thus ;—
the
2 3 4 5 6 7 8 9 10 11 12 13 14 15
PATENT PATENT PAT
8 1 11 4 6 12 9 2 13 5 7 14 10 3 15
upper line of numerals being written in order the lower line found for instance
as follows, the first letter occuring in the alphabet (here A) is numbered in its order
of sequence in the above fifteen letters, thus 1. 2. 3; then the next letter, here E, is
numbered thus, 4. 5 as often as it occurs; then the next "N," 6. 7; 1 8. 9. 10;
and lastly T, 11. 12. 13. 14. 15.
The end plate D is unscrewed and the tube C drawn out, the rings G can then
be lifted from their positions in the case (they being usually put away in their
numerical order) they are then taken out and threaded on the tube in the order of
the numbers in the lower line.
Each ring is then turned until one reads at the window E the first words of the
message to be written, the rings are then temporarily fixed by the pin H.
Now any other line on the device so set is chosen and written on the paper for
instance AS TIBCHZOURJKLA or divided up into words according
to fancy Astib, Behzo, Ur, Jkla.
The rings are then unlocked and the next words of the message are similarly
placed at the window and any other line copied, and this is repeated until the whole
message is written.
The receiver of the message possessing one of the instruments and knowing the
key word arranges the ring in accordance with the key word in the manner above
described or in any other manner previously agreed upon, and then translates the
message by arranging the letters given in their order in front of the window E and
looking over the other lines until one is reached having sense.
Before putting away the instrument the rings are taken off the cylinder and
replaced in the compartments of the case A in their numerical order and the
cylinder is slipped in at the end.
Should any person possess himself of the despatch and the above instrument he
could not decipher the despatch as the permutation of fifteen rings are too numerous.
Without the possession of the key word which may be changed at will no
deciphering is possible.
The lid of the case A has a holder for the rod H and annular partitions B B'B' B
are fixed in the case to retain the instrument when not in use.
The inside of the cover also bears indications in figures for the convenient
numeration of the rings.
.
.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed declare that what I
claim is ;-
The cryptographical instrument herein described consisting of a tubular core
with end disks and rotary rings bearing alphabetical and other signs, the window
cross piece E, the locking bar H and case constructed as set forth.
Dated this 2nd day of April 1892.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicant.