IMPROVEMENTS IN FASTENINGS FOR ALBUMS, SCRAP-BOOKS, AND LIKE Å DRIAL DA " PROVISIONAL SPECIFICATION
Year: 1881

page_text: LETTERS PATENT to Sidney Posen, of the Firm of Eduard Posen and
Company, of Offenbach on the Main, in the German Empire, and temporarily.
of Basinghall Street, in the City of London, Manufacturer, for an Invention of
"IMPROVEMENTS IN FASTENINGS FOR ALBUMS, SCRAP-BOOKS, AND LIKE
Å DRIAL DA "
PROVISIONAL SPECIFICATION left by the said Sidney Posen at the Office
of the Commissioners of Patents on the 7th May 1881.
SIDNEY POSEN, of the Firm of Eduard Posen and Company, of Offenbach on the
Main, in the German Empire, and temporarily of Basinghall Street, in the City of
London, Manufacturer. "IMPROVEMENTS IN FASTENINGS FOR ALBUMS, SCRAP-
BOOKS, AND LIKE ARTICLES."
For the purpose of my Invention I utilize or employ the ordinary stud or knob
with which the clasp usually engages, but instead of its being solid as hitherto, I
make it hollow so that it forms a chamber. Into this chamber I fit, insert, or
contrive a lock or locking device operated by a key.
In one arrangement the lock or locking device consists of a slotted tubular.or
cylindrical plug, or slotted annular piece inserted into and free to move within the
aforesaid chamber, and which carries on its outer end a locking or retaining plate
provided with a key hole through which the key is introduced for the purpose of
operating the same. Within the said tubular or cylindrical plug or annular piece
is a disc carrying a pin or stud, which on being depressed by the key enters the
slot in the plug or annular piece, and is free to travel in a rectangular or double
bayonet slot formed in the circumference of the chamber aforesaid, and to carry
with it the locking or retaining plate. A spring restores the disc and its pin to
their normal position by causing the pin to enter into the corresponding portion
of the rectangular slot on the opposite side of the chamber, and at the same
time to retain the locking plate in the required position.
Or the retaining or locking plate may be operated by a spring, and thereby
brought into its locking position on the clasp being engaged with the same.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Sidney Posen in the Great Seal Patent Office on the 3rd November
1881.
SIDNEY POSEN, of the Firm of Eduard Posen and Company, of Offenbach on the
Main, in the German Empire, and temporarily of Basinghall Street, in the City of
London, Manufacturer. "IMPROVEMENTS IN FASTENINGS FOR ALBUMS, SCRAP-
BOOKS, AND LIKE ARTICLES."
For the purpose of my Invention I utilize or employ the ordinary stud or knob,
with which the clasp usually engages, but instead of its being solid as hitherto, I
make it hollow, so that it forms a chamber. Into this chamber I fit, insert, or
contrive a lock or locking device operated by a key.
In one arrangement the lock or locking device consists of a slotted tubular or
cylindrical plug, or slotted annular piece inserted into and free to move within the
aforesaid chamber, and which carries on its outer end a locking or retaining plate
provided with a key-bole through which the key is introduced for the purpose of
operating the same. Within the said tubular or cylindrical plug or annular piece
is a disc carrying a pin or stud, which on being depressed by the key enters the
slot in the plug or annular piece, and is free to travel in a rectangular or double
bayonet slot formed in the circumference of the chamber aforesaid, and to carry
with it the locking or retaining plate. A spring restores the disc and its pin to
their normal position by causing the pin to enter into the corresponding portion of
the rectangular slot on the opposite side of the chamber, and at the same time to
retain the locking plate in the required position.
Or the retaining or locking plate may be operated by a spring, and thereby
brought into its locking position on the clasp being engaged with the same.
And in order that my Invention may be more fully understood and readily
carried into effect, I proceed to describe same, aided by the accompanying

page_text: a chamber, and into this chamber I fit or contrive a lock or locking device. This
lock or locking device consists in one arrangement, of a pin a which is rivetted to
the bottom of the hollow knob, and which serves as a guide for the key shewn in
Fig. 1. This pin a also serves as a guide for the annular disc or ring b, which is
provided with a stud or pin c. In the knob A, and around the annular disc, is a
tubular or cylindrical plug d, which is free to rotate when operated by the key.
This plug is slotted at d', and into this slot the stud or pin c is free to enter and
travel, as hereinafter described. This plug d is furnished at its outer end with
lugs h, which fit into corresponding slots ¹ contrived in the locking plate d*, and
by means of which this latter is secured in place. Or the locking plate may be
formed in a piece with the tubular or cylindrical plug. The pin c (which may be
fixed on or formed in a piece with the annular disc or ring b), is free to travel in
the rectangular or double bayonet slot f cut in the circumference of the hollow
knob A, and when it enters either of the vertical portions of such slot the locking
plate and plug are prevented from turning or rotating until moved by the key. In
Fig. 3 the pin c is shewn in position in the vertical portion of the slot f, such
position being the one that it would occupy when the fastening is in its locked
condition, as shewn in Fig. 1. When the slotted tubular or cylindrical plug d and
pin c reach either of the vertical portions of the slot f, they are shot outwards by
means of the coiled spring g, which is of course compressed when the ring b is
depressed by means of the key operating the lock.
"
Now when the locking plate dx is in the position shewn in Fig. 1, its eccentric
part d' is above the clasp B, so that this clasp cannot be removed; the pin c is then
in the position shewn in Fig. 3.
When it is desired to open the lock, the key is inserted into the keyhole of the
locking plate, and by means of its lower end the annular disc or ring b is depressed,
until its pin c which has travelled down the slot d' comes opposite the horizontal
portion of the rectangular or double bayonet slot f on the hollow knob A. The
bit" of the key however remains in the key hole during the depression of the
ring b, and if the key be then rotated, the plate dx performs a half revolution, and
the pin.c then slips into the vertical portion of the slot f. When the plate d* is
rotated, its eccentric part d' is also turned, and is removed from the clasp B, so that
this latter can be unhooked.
The clasp turns on hinges j, j, on the other attachment plate.
Although I have described and shewn my Invention as applied to an album, it
can be applied in precisely similar manner to scrap-books, bibles, and other like
articles.
Having now described my Invention, and in what manner the same may be
performed, I declare that I claim,―
First. Forming the knob or stud of clasp fastenings for albums and like articlos
hollow, and fitting the same with a lock or locking device, substantially as
described.
Second. The locking device consisting of the hollow knob or stud A, in com-
bination with the tubular or cylindrical plug d, the locking plate dx with its
eccentric extension d¹, the ring b with its pin c and the spring g, all substantially
as herein described and illustrated."
In witness whereof, I, the said Sidney Posen, have hereunto set my hand
and seal, this First day of November, in the year 1881.