Improvements in Spraying Apparatus for Paint, Ink, and other Pigments.
Year: 1895

page_text: Date of Application, 6th Feb., 1895
Complete Specification Left, 6th Nov., 1895-Accepted. 1st Feb., 1896
PROVISIONAL SPECIFICATION.
Improvements in Spraying Apparatus for Paint, Ink, and other
Pigments.
I, CHARLES LAWRENCE BURDICK of Memorial Hall, Farringdon Street in
the City of London Artist do hereby declare the nature of this invention to be as
follows:-
My invention refers to improvements in apparatus for spraying paint ink and
other pigments such as is described in my previous Patent Specification No. 9764
of 1892.
The finger lever for operating the pin valve which is situated in the front end is
preferably divided or forked near the bottom to allow the stem of the pin valve to
pass through and is pivotted to the top of the air valve spindle. The finger lever
on being moved operates a small lever one end of which is made with a curved face
or with a small wheel to reduce friction while the other end serves as fulcrum and
takes against an abutment on the trough shaped bottom. The said small lever
has a hole through which goes the stem of the pin valve and normally the pin
valve is kept in its forward position by means of the pressure exerted by a
spring. This spring is preferably of helical form to surround the stem of the
valve which stem is guided in a cylinder closed at the back end and secured in
the body of the instrument. As aforesaid the forked ends of the finger lever
are pivotted to the stem of the air valve which is normally kept closed by a
spring inside the air tube, but on pressing the finger lever down the air valve
is pushed off its seat and air from a pump or other source is freely admitted
the amount of air allowed to pass being regulated by varying the downward
pressure on the finger lever. The amount of colour supplied is regulated by
varying the radial movement of the finger lever and the two operations being
effected by a single finger of the hand of the operator may evidently be carried
out at the same time. The trough of the apparatus is divided off from the
space containing the levers and the like by a partition and a tight joint for the
stem of the pin valve is obtained by using a stuffing box therein.
The colour may either be supplied by filling the trough when required or by
filling the handle or body of the brush or the colour may be conveyed thereto by
a tube from a can or other reservoir either by gravity or under pressure. The
body in that case is provided with a partition which serves to shut off the space
containing the levers and the like. The partition has mounted thereon the afore-
said cylinder closed at the back end for carrying and guiding the back end of the
pin valve stem. The colour is supplied to the trough by means of a tube and air
is supplied to the body or reservoir (when the same is in use) by means of a
small valve in the reservoir or by means of a small tube which leads from the
reservoir to the trough in such manner that as long as a certain depth or amount
of colour is in the trough the end of the air tube is under the surface of the liquid
and consequently no more air can reach the reservoir until the colour is used and
becomes so low in the trough that the end of vent tube is open and more air
penetrates to fill the vacuum in the reservoir whereupon a fresh supply of colour
passes down to the trough. Under certain circumstances for instance if the
colour be supplied under pressure, I provide the opening to the trough with a
cover which may either be slipped over the front end of the brush and there held

page_text: by friction or the cover may be fastened for safety's sake and for ensuring a tight
joint by means of a set screw or other clamping device.
In applying the invention to apparatus for painting very large surfaces such as
the side of a house a ship or the like it may be of such a form as to be held in the
hand and the lever may be operated by the thumb instead of by the finger. The
pozzle and pin valve is as before described, air and colour being supplied by pipes
from convenient sources. The supplies of air and colour to the nozzle are
regulated by two valves which are opened simultaneously by means of a com-
paratively long lever preferably pivoted between the two pipes and the pin valve
is by a link and a lever having pivoted thereto another lever with a slot therein
connected to the aforesaid long lever in such manner that the thumb or a finger
of one hand may control the inlet of air and colour and the pin valve
simultaneously.
The conical cap or nozzle screws on to the end of the body forming the seating
for the pin valve and is adjustable for clearing and varying its distance from the
delivery. The conical cap is, if a coarse spray be required, provided with one or
more straight or curved internal grooves which serve to break up the air blast and
consequently thereby produce a coarse spray as aforesaid. The conical cap and
end of the pin, if it should project may be guarded by one or more strong
metal or other rods or the like outside thereof and connected to the body of the
apparatus.
Dated this 6th day of February 1805
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.
Improvements in Spraying Apparatus for Paint, Ink, and other
Pigments.
I, CHARLES LAWRENCE BURDICK of Memorial Hall, Farringdon Street in
the City of London Artist 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:-
My invention refers to improvements in apparatus for spraying paint, ink and
other pigments such as is described in my previous Patent Specification No. 9764
of 1892.
Figure 1 of the accompanying drawings is a longitudinal section to an enlarged
scale of an air brush or spraying apparatus constructed according to my
invention.
Figure 2 is a longitudinal section of an extension of the handle for connecting
the same to a separate colour supply.
Figure 3 is a transverse section on the line x-x Figure 1.
Figure 4 is a transverse section on the line y-y Figure 1 and
Figure 44 is a longitudinal elevation of a detail.
Figure 5 is a transverse section on the line z-z Figure 1.
Figure 6 is a longitudinal section of a modified form of nozzle.
Figure 7 is a similar view of another form.
Figure 8 is a longitudinal section of an apparatus for painting large surfaces
and
Figure 9 is a transverse section on the line A B Figure 8.
Referring to Figures 1 to 5, the finger lever 15, surmounted by the knob 19 for
operating the pin valve 11 having its seating in the delivery aperture 6, is
preferably divided or forked near the bottom (see Figures 1 and 3) to allow the
stem of the pin valve to pass through and the pin 48 bears against the upper end

page_text: of the spindle 17 of the air valve 27. The finger lever 15 on being moved back-
wards in its slotted guide 18 operates a small lever 30 the upper end of which is
made with a curved face or with a small flanged wheel or roller 40 to reduce
friction while the other end serves as a fulcrum and takes against an abutment 16
on the trough shaped bottom 14. The extent of motion of the finger lever 15 may
be regulated by the adjusting screw 28. This abutment has a hole through it
through which goes the stem or spindle of the air valve 27 and it is also so slotted
as to serve to guide the fulcrum pin 48 of the lever 15. The pin valve 11 has a
sleeve 39 which is fixed thereon by means of a set screw and this sleeve takes
against the small lever 30. The small lever 30 has a hole through which goes the
stem of the pin valve 11 and normally the latter is kept in its forward position by
means of the pressure exerted by a spring 29. The spring 29 is preferably of
helical form as shown to surround the stem of the pin valve 11, which stem is
guided in a cylinder 42 closed at the back end and secured to a partition 7 in the
body of the instrument. As aforesaid the forked ends of the finger lever 15 are
pivotted to the stem 17 of the air valve 27 which is normally kept closed by a
spring 34 mounted on the lower stem of the said valve guided inside the air
tube 23, but on pressing the finger level 15 down the air valve 27 is pushed off its
scat 24 and air from a pump or other source is freely admitted, the amount of air
allowed to pass being regulated by varying the downward pressure on the knob 19
of the finger lever 15. The lower stem of the air valve 27 is preferably guided
in a bearing 31 inside the air tube in such manner that the air can pass the said
bearing which is for this purpose perforated all round as shown in Figures 1 and 2.
The amount of colour supplied is regulated by varying the radial movement of the
finger lever 15 and the two operations being effected by a single finger of the hand
of the operator may evidently be carried out at the same time and the amount of
colour allowed to pass the opening 6 and air supplied may be varied as desired.
The trough 32 of the apparatus is divided off from the space containing the levers
and the like by a partition 12 and a tight joint for the stem of the pin valve is
obtained by using a stuffing box 44 therein.
The colour may either be supplied by filling the trough 32 when required or by
filling the handle 5 which is for that purpose capable of being unscrewed from the
body of the brush, or the colour may he conveyed thereto by a tube from a can
(see Figure 2) or other reservoir either by gravity or under pressure. When the
colour to be used is in the handle 5 it flows from thence by a pipe 13 to the
trough 32 and air may be supplied to the handle to fill the vacuum caused by
the escape of the colour or instead thereof another and preferably smaller tube 45
is here shown leading from the reservoir handle 5 to the trough 32 in such manner
that as long as a certain depth or amount of colour is in the trough the end of the
air tube is under the surface of the liquid and consequently no more air can reach
the handle until the colour is used and the level thereof becomes so low in the
trough that the end of the air or vent tube 45 open and more air penetrates to
fill the vacuum in the reservoir handle, whereupon a fresh supply of colour passes
down the colour tube 13 to the trough. Under certain circumstances, for instance
if the colour be supplied under pressure, both tubes 13 and 45 will of course serve
to conduct the pigment and I provide the opening to the trough with a cover 46
(Figures 4 and 44) which is here shown as surrounding the apparatus and being
provided with a set screw 47, but it is evident that this cover might be slipped
over the front end of the apparatus and held by friction or in any other convenient
manner.
The modified form of conical cap or suction nozzle 20, Figure 6, screws on to
the end of the body 5 so as to make it adjustable for cleaning repairing and varying
its distance from the delivery. The seating at 6 of the pin valve is preferably
made detachable from the body by screwing as shown so as to be adjustable for
cleaning and repairs; it is provided further with a flange 49, and the space
between it and the end of the body of the air brush forms the air chamber in the
nozzle, the air passing out through holes 50. The suction nozzle 20 and end of

page_text: the pin, if the latter should project may be guarded by one or more strong metal
or other rods 51 outside thereof, or instead thereof the suction nozzle 20 may as
shown in Figure 7 be extended to form a guard. It is found convenient to form
the guard in one with or on the nozzle as it permits both to be removed at the
same time at a single operation.
In applying the invention to apparatus for painting very large surfaces, such as
the side of a house, a ship or the like, it may as shown in Figure 8 be of such a
form as to be held in the hand and the lever 15 may be operated by the thumb
instead of the finger. The nozzle 20 and the pin valve 11 are of similar
construction to those already described, air and colour being supplied respectively
by tubes 23 and 5 from convenient sources. The supplies of air and colour to the
nozzle are regulated by two valves called 27 and 52 which are opened simultaneously
by means of the comparatively long lever 15 which has a slot therein for a pin 53.
Connected to each end of this pin 53 are lever arms 54 and 55 for turning on and
off the air and colour valves respectively. The lever 15 is mounted on its fulcrum 58
and is provided with a spring 34 for the purpose of normally holding the air and
colour valves 27 and 52 closed. The pin valve 11 works in a tube 42 with a
stuffing box 44 and a spring 29 as described with reference to Figure 1. The
lever 30 is pivotted to an arm 16 on the body and the amount of play to be given
the pin valve 11 may be regulated by the adjusting screw 28. The lever 30 is
connected to the pin valve 11 by means of the link 56. In order to communicate
motion to the levers 30 and 15 by means of one thumb or finger the knob 19 is
mounted on a connecting lever 57 which when pressed communicates motion to the
lever 15, the latter working in a slot shown in dotted lines in said connecting lever.
When the pin valve 11 is to be operated the knob 19 is drawn back thereby
communicating motion by means of the connecting lever 57 and the lever 30. It
is evident that the valves 27 and 52 and the pin valve il may all be operated at
the same and by one thumb or finger. If only a small amount of colour is
required this may be supplied by a small reservoir 59 having a screwed part 60
which screws into a correspondingly formed part in the body of the instrument.
Below the screwed part 60 and in one therewith is a plain plug 61 which fits into a
recess in the partition 7 in such manner that the passage 13 through the partition
is blocked up by the plug at the back so that the colour from the reservoir 59
cannot go back into the back part of the body or into the colour supply pipe 5,
but the front part of the said plug has an opening through which the colour from
the reservoir flows down to the aperture 6. Under ordinary circumstances when
the colour is supplied by the tube 5 the screwed plug 62 is screwed into the hole
see Figure 9 and as this screwed plug has no plain part, the passage 13 is left
entirely open for the colour to flow through.
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 1
claim is :-
1. An apparatus for spraying paint, ink and other pigments consisting of a
handle or body part 5 with a suction nozzle 20 and a pin valve 11 operating in the
body part, said pin valve being actuated by means of a small lever 30 having a
wheel or roller 40 moved by a finger lever 15 which also serves to actuate an air
valve 27, the pin valve 11 and the air valve 27 both being kept normally closed by
means of springs substantially as described and shewn.
2. An apparatus for spraying paint, ink and other pigments consisting of a
handle or body part 5 adapted to receive the paint and communicating with a
colour trough 32 by means of a colour tube 13 and an air tube 45, a removable
cover 46 to be used as required, a suction nozzle 20 and a pin valve 11, said pin
valve being actuated by means of a small lever 30 having a wheel or roller 40
moved by a finger lever 15 which also serves to actuate an air valve 27 and the
pin valve 11, substantially as described and shewn with reference to Figures 1
tu 5.

page_text: 3. In an apparatus for spraying paint, ink and other pigments the application of
one or more rods or an extension 51 to the suction nozzle 20 substantially as
described and shewn on Figures 6 and 7.
4. An apparatus for spraying paint ink and other pigments consisting of an air
supply tube 23 and colour tube 5 having valves 27 and 52 operated by a lever 15
which is connected to a pin valve 11 to open and close a delivery aperture 6 in the
body part, and a suction nozzle 20, with or without a colour reservoir 59,.
substantially as described and shewn with reference to Figures 8 and 9.
Dated this 6th day of November 1895.
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.