Improvements in Apparatus for Damping Letter-copying Books and for other Analogous Purposes.
Year: 1889

page_text: Date of Application, 15th May, 1889
Complete Specification Left, 15th Feb., 1890-Accepted, 29th Mar., 1890
PROVIDIONAL SPECIFICATION.
Improvements in Apparatus for Damping Letter-copying Books and
for other Analogous Purposes.
.I WILLIAM HERBERT DAWSON of 65 Monton Road Eccles near Manchester
Salesman do hereby declare the nature of my said invention to be as follows :—
My object is to produce a simple and reliable roller or apparatus for damping
copying books, lithographic stones and for other analogous purposes and forming an
efficient substitute for the brushes and sponges hitherto used.
In carrying out my invention I employ a roller as the damping medium and the
surface of which is of a spongy or absorbent nature so as to take up and retain the
water supplied either from a reservoir contained within the roller itself or in a cistern
affixed to the frame or handle. The water contained in this reservoir or cistern being
arranged to escape by suitable perforations or orifices on to the absorbent covering
of the roller and so to keep the same constantly and evenly moistened and ready
for use.
By means of its handle this improved damping roller is conveniently passed or
rolled over the leaf of the copying book or other surface requiring to be moistened
and as it rolls along it imparts its dampness to such surface without requiring to dip
the apparatus into water as in the case of using a brush or sponge as hitherto
practised.
D: 1 L J
1000
JOHN G. WILSON,
Patent Office, 55, Market Street, Manchester, Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Damping Letter-copying Books and
for other Analogous Purposes.
1 WILLIAM HERBERT DAWSON of 65 Monton Road Eccles Lancaster Salesman
do hereby declare the nature of my said invention and in what manner the same is
to be performed to be particularly described and ascertained in and by the following
statement:
My object is to produce a simple and reliable roller or apparatus for damping
copying books lithographic stones and for other analogous purposes and forming an
efficient substitute for the brushes and sponges hitherto used. And consists in
employing a roller as the damping medium the surface of which is of a spongy or
absorbant nature so as to take up and retain the water supplied, either from a reservoir
contained within the roller itself or in a cistern being arranged to escape by suitable
perforations or orifices on to the absorbant covering of the roller and so to keep the
same constantly wet or moistened and ready for use.
By means of its handle this improved damping roller is conveniently passed or
rolled over the left of the copying book or other surface requiring to be moistened
and as it rolls along it imparts its dampness to such surface without requiring to dip
the apparatus into water as in the case of using a brush or sponge as hitherto
practised.
On the accompanying drawing Figs. 1 & 2 are perspective views of a simple form
of my improved damping apparatus shewing it in its relative positions when in and
out of use. Fig. 3 is a transverse sectional view of Fig. 2 on line a-b. Fig. 4 is
a similar view of Fig. 1 on line c―d.
In all the views a is the sheet metal or other roller perforated over its entire surface
& covered with the felt bor other similar material capable of being moistened,-and

page_text: within which is mounted a cylindrical water chamber or cistern d the extremities e e
of which are reduced in diameter so as to form suitable bearings for the aforesaid
roller a to revolve upon. One of these extremities I provide or fit with a screw cap
or feeder el enabling me to readily fill or replenish with water or other liquid the
cistern d. f is.a suitable handle for manipulating the apparatus and is affixed by
soldering or otherwise to the raxis e and terminates in a foot or projection g at each
end-for the apparatus to rest upon-when-not in use, as seen in Fig. 2.
By now providing the internal cistern.d with say one two or inore rows of per-
forations d' at the part fartliest away from the foot g and placing it in the position.
shown in Fig. 2. any liquid contained therein is retained and not allowed to escape-
but immediately the apparatus is inverted, required to be used, or changed to the
position seen in Fig. 1 the liquid passes through such perforations into the roller a and
finally escapes through the orifices h on to the surrounding covering of felt; thereby
moistening the same.
Fig. 5 illustrates a modification of my invention in which i designates the cistern
or water container, mounted by means of the projections on the bearings k above
the roller and provided at its narrow or lower edge m with perforations for 'per-
mitting the water to percolate through and moisten the felt covered roller beneath.
It will be obvious that by simply inverting this form of apparatus after use the water
will be effectually retained as in the apparatus previously described. This apparatus.
is supplied with water through the screw cap (n).
Fig. 6 is another modification of my invention in which the hopper shaped vessel (o)
and elongated vessel (p) contain the water the latter being furnished with orifices at
its lower edge to supply water to the damping roller below. This form of apparatus
is also inverted when not in use. to retain the water or other liquid.
Having thus particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be perforined I'declare that what I
claim is
1st. The improved damping apparatus,-consisting of a perforated roller; covered
with felt or other similar material; and supplied with liquid from an internal water
supply cistern, mounted and operating substantially as and for the purposes herein
before described & illustrated on the accompanying drawing.
2nd. The improved damping apparatus consisting of an external water supply
cistern provided with perforations at its lower edge allowing the liquid contained
therein to fall upon and moisten the cloth covered roller beneath, substantially as and
for the purposes hereinbefore described and illustrated on Fig. 5 of the accompanying "
drawing.
The improved construction and arrangement of damping apparatus provided with
a hopper shaped and elongated liquid container substantially as and for the purposes
hereinbefore described and illustrated in Fig: 6 of the accompanying drawing.
Dated this 14th day of February 1800