Improvements in Apparatus for Coating Surfaces with Paint and similar Substances.
Year: 1896

page_text: Date of Application, 20th June, 1896
Complete Specification Left, 20th Mar., 1897-Accepted, 22nd May, 1897
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Coating Surfaces with Paint and
similar Substances.
We, ROUGHSEDGE WALLWORK, Engineer, of the Firm of Henry Wallwork
& Co., of Roger Street, Manchester, in the County of Lancaster, and ARTHUR
COLLINGS WELLS, Engineer, of the Firm of A. C. Wells & Co., of 103 Midland
Road, St. Pancras, in the County of London, do hereby declare the nature of this
invention to be as follows:-
This invention has for its object to improve the contrivances by which paint or
other substance is projected in the form of a fine spray or shower on to the surface
to be coated.
According to our invention we form the nozzle-head, that is to say the portion
of the contrivance to which the nozzles are attached, with a valve spindle or
plunger which works in a stuffing-box formed in a detachable plug. This plug is
provided with finger pieces or wings for permitting of its ready removal. Pivoted
to one of these wings is a lever which is connected with the said valve spindle or
plunger at its upper end and at its lower end is appropriately formed to render it
capable of being conveniently reached and operated by the thumb of the user.
The said valve spindle or plunger has at its inner end a projection which may
be produced by reducing the diameter of the spindle at this part, and the said
projection or reduced portion is adapted to enter an opening through which the
paint passes to reach the nozzles. This projection or reduced portion of the
spindle serves as a. valve to close the said opening and also serves to clear
the opening of any impediment that may lodge therein during the flow of the paint.
A spring is provided for normally keeping the plunger or valve spindle in its closed
position.
In some cases we form the end of the reduced part of spindle with a cone shaped
or tapered so that the operator can by this means regulate the supply of paint as
desired by withdrawing it more or less out of the hole through which the paint
passes.
The aforesaid plug is advantageously formed with a perforated portion, or is
provided with a gauze strainer, which surrounds the inner part of the valve spindle
or plunger and tends to prevent impurities in the paint from passing through the
said opening in the nozzle-head and reaching the nozzles.
The compressed air for effecting the spraying of the paint is led by a pipe to the
air nozzle; and the paint may be supplied by another pipe conducting it from a
suitable paint tank or it may be supplied directly to the nozzle from a paint
container detachably connected to the said nozzle-head.
In order to reduce the weight of the contrivance we may make the nozzle-head
of aluminium.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Coating Surfaces with Paint and
similar Substances.
We, ROUGHSEDGE WALLWORK, Engineer, of the Firm of Henry Wallwork
& Co., of Roger Street, Manchester, in the County of Lancaster, and ARTHUR.
COLLINGS WELLS, Engineer, of the Firm of A. C. Wells & Co., of 103 Midland
Road, St. Pancras, in the County of London, 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 apparatus for coating surfaces with
paint and similar substances by projecting the same in the form of a fine spray or
shower on to the surface to be coated.
According to the said invention, the head of the apparatus, which carries the
spraying nozzles and which is connected with a compressed air pipe and a pipe for
supplying paint or the like, is provided internally with a piston valve controlling
the opening or passage through which the paint flows to the nozzles and with a
removable plug provided with a stuffing box through which the spindle of the
aforesaid valve works. The valve is so formed that it serves also when its spindle
is worked to and fro to clear the opening of any impediment or obstruction and a
suitably arranged thumb lever is provided to enable the spindle to be thus operated
when desired, the valve being normally kept closed by a spring acting on the said
lever.
In some cases the valve may be coned or tapered, so that the flow of paint may
be regulated by withdrawing it more or less from the opening.
A suitable strainer is provided in conjunction with the said plug so as to
intercept any large particles which would be likely to choke the aforesaid
opening.
And in order that the said invention may be readily understood we will proceed
to describe the same fully by reference to the accompanying drawings in which
Figure 1 is a vertical central section of one form of our improved apparatus, and
Figure 2 is a corresponding elevation of a modified form thereof, and
Figure 3 is a detail view hereinafter referred to.
Referring more particularly to Figure 1, a is the head of the apparatus which in
this case is arranged in an inclined position and is provided with a pair of parallel
tubular lateral extensions a¹, a, which depend therefrom vertically or approximately
so, the former viz. a' being connected to the pipe 6 through which the paint passes
to the nozzle while the latter viz. :-a² is connected to the pipe e through which the
compressed air reaches the nozzle. d and d' are the spraying nozzles which are
screwed upon the head a thus admitting of their being readily adjusted relatively
to one another, or replaced by other nozzles as required. e is the piston valve for
controlling the flow of paint and el is the spindle thereof, the said valve being
formed by reducing the diameter of the end of the spindle and being adapted to
fit the opening through which the paint flows to the nozzles. g is a removable
plug which is screwed into the head a and through which the spindle e passes, a
stuffing box g¹ and a gland g² being provided to form a tight joint with the said
spindle. Upon its outer part the plug g has a pair of finger pieces or wings h, h
for turning it upon its axis to remove it from the nozzle head.
i is the thumb lever for operating or regulating the valve. It is pivoted at i¹ to
one of the wings and fits near its upper end between a pair of collars on the
valve spindle, its lower end being so formed that it can be readily worked by the
thumb of the user. This lever enables the said spindle and the valve e to be
*1

page_text: withdrawn when it is desired to allow the paint to flow through the opening f..
; is the spring for closing the valve, this spring being connected at 11 to the
wing and acting upon the upper end of the said lever.
kis the strainer by which large particles of paint are prevented from reaching
the said opening. It consists of a tubular extension formed upon or secured to the-
inner end of the plug g and situated within a cavity or chamber a³ formed in the
head of the apparatus. This strainer has a flange which fits in the upper-
contracted end of the cavity a³. It will be readily seen from this construction that
it is practically impossible for any obstruction in the paint to get into the
opening, and even if this passage should become choked it can be freed by
working the valve to and fro in it, the valve thus acting as a plunger.
When it is desired to clear the strainer it is only necessary to withdraw it from
the nozzle head by unscrewing the plug 9, and to cleanse it in any suitable-
manner.
In some cases a gauze strainer may be employed instead of the perforated
strainer shown.
By making the valve e with a tapered extremity e³, (Figure 3) the flow of paint.
through the opening f can easily be regulated by varying the extent to which the
said valve is withdrawn.
In the arrangement shown in Figure 2, the head a is provided with a small
detachable paint container / having a bayonet joint connection therewith formed by
hooked projections or lugs a' on the head engaging inclined surfaces on the
flange of the container. By the interposition of a washer or other suitable
packing therefore, a tight joint can be very easily made between the container and
the head of the apparatus. Inside this container is arranged the paint tube b.
which extends nearly to the eud thereof. The head is in this case arranged
horizontally, the container depending vertically therefrom and the air tube c
being inclined as shown. The plug g instead of having wings is provided with a
nut 93 for enabling it to be screwed into and out of the head, and a projection a® is
formed on the said head to carry the pivot i of the thumb lever i, the spring j
being directly connected to the head. The air passage in the head a is so arranged
that the air pressure acts on the contents of the container and forces the same up.
the tube as is well understood. A hook m is provided for suspending the
apparatus when not in use, and the screw m' by which this hook is secured to the
head may serve to close an opening designed to give access to the interior of
the bead, and to clear the tube up which the paint rises.
In other respects the construction and mode of operation of the apparatus shown
in Figure 2 is analogous to that of the apparatus shown in Figure 1. In either
arrangement we may make the head of the apparatus of aluminium in order to
reduce the weight thereof.
Obviously two or more paint containers may be combined together in an
apparatus of the kind shown in Figure 2 in order to enable paints of different.
colours or shades to be applied from the same apparatus, either from the same set
of nozzles or from independent nozzles.
Furthermore an apparatus may be provided with one or more paint containers as.
in Figure 2 and also with a paint supply pipe leading to a reservoir as in
Figure 1.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim in apparatus for coating surfaces with paint and similar substances by
spraying, is :-
1. The combination with the nozzle head, of a sliding spring controlled rod,
having its inner end reduced to form a piston valve substantially as described and
for the purpose specified.
2. The combination with the nozzle head of a sliding valve spindle, a detachable.
plug provided with a stuffing box through which the aforesaid spindle works, and

page_text: of a strainer forming part of the detachable plug, substantially as described and
for the purpose specified.
3. The improved nozzle head having its parts constructed and arranged to
operate substantially as described with reference to Figures 1 and 3 or Figure 2 of
the accompanying drawings.
Dated this 20th day of March 1897.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicants.