Year: 1888

page_text: placed. A small padlock, j, secures the chain in position, as seen in Figure 1. The
lazy-tongs action of bands bb bb, so connected to each other at their inner ends and
to the bands eat their central portions, will cause the device to adjust itself
readily to the width and length of the book, the chain passing around the back of such
book and being readily secured in one of its links to the bands bb b¹¹. The
bands c c c c are changed from one thickness of book to another by throwing each
pair of bands out of parallelism, as seen in Figure 4, thus admitting of the release of
the notch of the stud f from the hole g in the lug e¹, so as to drop down or draw up
through said hole g the stud f to a proper position to suit the thickness of the letter-
book on which it is desired to replace the device. When the band c is turned around
again into parallelism with band e, as shown in Figure 5, then one of the notches on
stud will turn around and lock into the flange e¹.
In the drawings, Figures 6 and 7, the same construction of locking device is shown
as in the other figures, except that the corner frames or clamps c c c¹c² are not
furnished with bent over ends and lugs, so as to permit of the same character of
adjustability for the thickness of the book. The provision in Figures 6 and 7 is very
simple. In the ends of the corner frames ce c¹ care slots k, in which are threaded
leather bands 111. These bands will be drawn a little over the sides of the book
when such book is thinner than the full depth or complete letout of the bands. On the
inner ends, 6, of the metal bands bb b₁ b₁ are also slots, so that the ends of the leather
strap may be secured thereto, and the straps be buckled across the back of the book
after the device is properly drawn over the book.
The padlock is inserted through an eye, o, made in the tongue of the strap-buckle.
thus securing the contents of the book in this modification as effectually as shown in
Figures 1 to 5, inclusive.
Dated this 24th day of Danmhan 1000
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Book-locks for Press Copying Letter Books.
I, STANLEY A. COHEN of the City and State of New York, United States of
America, Inventor, 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 :-
This invention relates to certain new and useful improvements in book-locks for
press-copying letter books, of which the following is a specification, reference being
had to the drawings accompanying the provisional specification and the letters marked
thereon forming part thereof.
The object of the invention is to furnish a suitable lock attachment to a press-
copying letter-book, so that the contents of the book cannot be surreptitiously
examined while the book is exposed for use during office hours, or out of its safe
or lock-up.
The present device is adjustable to different sized and thicknesses of books.
In the drawings accompanying the provisional specification,
Figure 1 is a perspective view of my improved book-lock attached to a press-copying
letter-book.
Figure 2 is a cross section thereof, taken in the line à a, Figure 1, the book being
left out.
Figure 3 are detail views illustrating the manner in which the corner pieces or clamps
of the book-lock are constructed so as to admit of their adjustment to books of variable
thickness.
Figure is a detail view illustrating the manner in which the adjustment is effected,
showing stud in one, and the corresponding hole in a pair of corner clamps. The one
having the hole is shown in section.

page_text: Figure 5 is a similar detail view to Figure 4, showing the ends of the corner pieces
or clamps interlocked.
Figure 6 is a modification of my improved book-lock.
Figure 7 is a section on line y y of Figure 6, taken in the direction of the arrows.
This view also shows the book in cross section.
The
In the arrangement, Figures 1 to 5. inclusive, a is a letter-press copying-book.
bbbare two pairs of metal bands, two on each side of the book-cover, and
connected together by rivets at 6. The other ends of these metal bands are
respectively connected to the central portions of the corner frames or clamps c c c¹ c¹.
These corner frames or clamps have bent-over ends d d d d at one side and
lugs e e e e at the other side, or portion of the frames grasping the front edge
of the book. From the lugs é e there projects down into the lugs el el a stud f,
containing a series of notches. When the corner frame or clamp is in position on
the book that is, both of its bars cel in a parallel position-one of these notches
will be in the hole g in the lug e and so turned round therein that the notch
will catch onto the lug e. This determines the thickness of the book.
operation of the device to change it to another thickness of book will be explained
farther along. h is a chain which is rigidly attached to the inner ends of bars b' b¹,
and is brought around to the other two, bb, which latter contains in its rivet an
eye, over which a link of the chain may be placed. A small padlock j, secures
the chain in position, as seen in Figure 1. The lazy-tongs action of bands bb b¹ b²,
so connected to each other at their inner ends, and to the bands c c c c at their
central portions, will cause the device to adjust itself readily to the width and length of
the book, the chain passing around the back of such book and being readily secured
in one of its links to the bands bbbb. The bands c c c¹ c¹ are changed from one
thickness of book to another by throwing each pair of bands out of parallelism, as
seen in Figure 4, thus admitting of the release of the notch of the stud f from the
hole g in the lug e', so as to drop down or draw up through said hole g the stud f to a
proper position to suit the thickness of the letter-book on which it is desired to replace
the device. When the band c is turned around again into parallelism with band c', as
shown in Figure 5, then one of the notches on stud f will turn around and lock into
the flange e¹.
In the drawings, Figures 6 and 7, the same construction of locking device is shown
as in the other Figures, except that the corner frames or clamps c c c c are not
furnished with bent-over ends and lugs, so as to permit of the same character of
adjustability for the thickness of the book. The provision in Figures 6 and 7 is very
simple. In the ends of the corner frames c c c c are slots k, in which are threaded
leather bands 1111. These bands will be drawn a little over the sides of the book
when such book is thinner than the full depth or complete let-out of the bands.
On the inner ends of the metal bands bb bbare also slots, so that the ends
of the leather strap n may be secured thereto and the straps be buckled across the
back of the book after the device is properly drawn over the book.
The padlock is inserted through an eye o made in the tongue of the strap buckle,
thus securing the contents of the book in this modification as effectually as shown in
Figures 1 to 5 inclusive.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In the book-locking device herein described, the combination of two corner frames
or clamps with two pairs of adjustable bands and means for locking said frames and
bands to the book, substantially as described.
2. In the book-locking device herein described, the combination of the corner
frames or clamps c c c c with the adjustable bands bb bb' and a chain for securing
the inner ends of the bands bb together and the device securely upon the book,
substantially as described.

page_text: 3. In the book-locking device herein described, the arrangement of adjustable corner
frames or clamps so that the members thereof can be separated or drawn together by
means of the notched stud f, placed upon one of the bars c and passing down through
the lug e¹ on the other bar c', substantially as described.
Dated this 23rd day of September 1889.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.