Improvements in Letter Files.
Year: 1899

page_text: Date of Application, 11th Dec., 1899
Complete Specification Left, 3rd Sept., 1900-Accepted, 6th Oct., 1900
Improvements in Letter Files.
I, MAX LINDNER, of 170, Fleet Street, in the City of London, Manufacturer,
do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in letter files, more particularly of the
kind known as transfer files or binding cases.
In carrying out the invention I construct the file of the usual case or cover and
in connection with one flap thereof I provide the pins forming the file proper;
these pins, however, instead of being riveted or otherwise secured separately to
the cover as has heretofore usually been the case are formed of a single piece of
tubing, preferably of brass or like metal, bent to a U-shape, the portion of
the U connecting the two legs or limbs being flattened. The U-shaped file thus
formed is passed through two holes in the cover from the outside thereof so that
the two tubular prongs project inside the case or cover being held by suitable
means such as a pin, hooks, bolts, or the like which is or are passed through holes
in the two tubular prongs on the inside of the cover.
A bent wire frame is also provided for holding the papers in position upon the
file, the said wire frame being formed of a U-shaped piece of wire the ends of the
legs of which are curved downwards so as to enter the two tubular limbs of the
file the dimensions of the frame being such that the horizontal portion, when
the legs are inserted in the tubular limbs of the file, reaches to the surface of the
cover to which it is held by engagement with a suitable knob or the like.
A file constructed in this manner possesses the advantage that the necessary
metal parts can be detached from the cover with facility so that the file can con-
veniently be packed for transport, etc.
Dated the 11th dow of Danamber 1800
Improvements in Letter Files..
I, MAX LINDNER, of 170, Fleet Street, in the City of London, 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:-
This invention relates to improvements in letter files, more particularly of the
kind known as transfer files or binding cases.

page_text: In carrying out the invention I construct the file of the usual case or cover and
in connection with one flap thereof I provide the pins forming the file proper;
these pins, however, instead of being riveted or otherwise secured separately to
the cover as has heretofore usually been the case are formed of a single piece of
tubing, preferably of brass or like metal, bent to a U-shape, the portion of the U
connecting the two legs or limbs being flattened. The U-shaped file thus formed
is passed through two holes in the cover from the outside thereof so that the two
tubular prongs project inside the case or cover, being held by suitable means such
as a plate or a pin, hooks, bolts, or the like which is or are passed through holes
in the two tubular prongs on the inside of the cover.
A bent wire frame is also provided for holding the papers in position upon the
file, the said wire frame being formed of a U-shaped piece of wire the ends of
the legs of which are curved downwards so as to enter the two tubular limbs of
the file; the dimensions of the frame may be such that the horizontal portion.
when the legs are inserted in the tubular limbs of the file, reaches to the surface
of the cover to which it is held by engagement with a suitable knob or the like.
A file constructed in this manner possesses the advantage that the necessary
metal parts can be detached from the cover with facility so that the file can con-
veniently be packed for transport, etc.
To enable the invention to be fully understood I will describe it by reference
to the accompanying drawings, in which:-
Figure 1 is a perspective view of a letter file constructed according to the
invention:
Figure 2 is a sectional elevation of the lower end of the file prongs or pins
shewing the mode of securing the same to the file case:
Figure 3 is a plan thereof:
Figures 4, 5, 6 and 7 are views illustrating a modified arrangement for securing
the file pins; and
Figure 8 is a view similar to Figure 1 illustrating a modified form of wire
frame for holding the papers in position.
Figures 1 and 8 are drawn to a smaller scale than the other figures.
a is the case or cover and b, b are the pins or prongs forming the file proper.
As clearly shewn these pins are formed from a single piece of tubing, preferably
of brass or similar metal, bent to a U-shape, the horizontal portion c of the U
being flattened, see Figures 2, 5 and 6. The two tubular prongs b, bare passed
through holes d, d in the case or cover a from the outside thereof.
This
To hold the said tubular prongs in position in the case I can employ the arrange-
ment shewn in Figures 1 to 3, that is to say, holes e, e are formed in the base
of the tubular section of the prongs b, b just above the point where the said
prongs project inside the case or cover a and a pin f is passed through these
holes e, e so as to prevent the prongs from leaving the case or cover.
arrangement is suitable where the case or cover a is fairly stiff. Where the
cover, however, is not sufficiently stiff I advantageously secure the prongs b, b in
position by means of a clamping plate g, Figures 4, 5, 6 and 7. This plate g is
bored with two holes g¹, g¹ at the same distance apart as the pins or prongs and
of a size sufficient to receive the said tubular prongs, the said holes g1 being so
formed that burrs or projecting rims g³, are left upon the upper side of the
plate g
After the U-shaped tube has been inserted through the case or cover,
the strip is passed down over tubular prongs b, b until it is applied against the
inside of the cover a as shewn in Figure 5; the burred edges are then pressed
inwards so that they catch under the shoulders formed
the tubular
upon
prongs b, b at the bottom thereof at the points of junction with the horizontal
flattened portion of the U-shaped file.
h. Figure 1, is the U-shaped piece of wire forming the frame which is provided
for holding the papers in position upon the file. The legs h¹ of the said frame
are curved downwards so that they can be inserted into the tubular prongs b, b

page_text: and are of such a size that the horizontal portion of the U can be sprung under
the head of the knob or button i which is secured to the case or cover a.
Instead of the bent U-shaped frame h. I can employ the simple U-shaped wire
frame shewn in Figure 8. In this case the frame is held in position by a spring
clip & fixed upon the back of the case or cover a.
j
To hold the papers together upon the prongs of the file I advantageously employ
the compressor 1, Figure 1. As shewn, this device is in the form of a strip, the
ends of which are bent back so as to form spring clips which take over the
prongs b, band which clasp the said prongs with sufficient strength to retain
the compressor in any position to which it may be adjusted upon the prongs.
Letter files made as above described can be very conveniently packed, as the
file proper can be detached from the cover with facility, thus enabling the whole
to be collapsed and packed in a relatively small space.
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 a letter file the combination with the case or cover of a U-shaped tubular
strip the horizontal portion of which is flattened and the prongs of which are
passed through holes in the case or cover from the outside thereof, and of means
for fixing the said U-shaped tube in position, substantially as, and for the
purpose, hereinbefore described.
2. In a letter file of the kind referred to in Claim 1, the described means for
fixing the U-shaped file proper in position, such means comprising a pin passed
through holes in the tubular prongs upon the inside of the file or of a plate having
hurred holes passed over the pins and secured by pressing the burrs under the
shoulders formed upon the tubular prongs by the flattened portion of the tube
substantially as hereinbefore described.
3. In letter files of the kind described in Claim 1, the employment for holding
the papers in position of the wire frame h, and knob or button i. Figure 1. or of
the frame and spring clin k, Figure 8, substantially as hereinbefore described.
4. The combination with a letter file of the kind described in Claim 1 of the
compressor 1. substantially as herein before described.
5. Letter files constructed substantially as herein before described and illustrated
in the accompanying drawings.
1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.