Improvements in Apparatus for Coating with Tin, Lead, or other Metals or Alloys of same.
Year: 1893

page_text: Date of Application, 11th Nov., 1893
Complete Specification Left, 13th Aug., 1894-Accepted, 10th Nov., 1894
PROVISIONAL SPECIFICATION
Improvements in Apparatus for Coating with Tin, Lead, or other
Metals or Alloys of same.
I, HENRY FRANCIS TAYLOR of Tynant, Neath, in the County of Glamorgan,
Engineer, do hereby declare the nature of this invention, to be as follows:-
These improvements refer to apparatus operating in a novel manner and serving
to mechanically or automatically carry the plate down into the pot and cant it and
raise it into the nip of the rolls on the exit side of the pot. According to this
invention the plate to be coated is by the workman inserted between the open
jaws of a nipping appliance which then by suitable machinery is depressed for the
plate to be coated in the tin or other metal or alloy. The nippers never rise out
of the coating medium. As the nippers descend they close upon the plate. The
plate is then canted and raised while still being held in proper position by the
nipping appliance and after the plate has been taken hold of by the rolls
the nippers are opened and then returned to their original position ready to receive
the next plate. All this is done mechanically or automatically; moreover, in the
mechanism operating as described (and this forms an important part of my
invention) I provide means for adjusting the opening of the nippers according to
the thickness of plate to be coated and I afford great facility for effecting this
adjustment outside of the pot; I also provide means for regulating the time of
opening the nippers in the up stroke for receiving the plate and also the time of
closing them in the down stroke. I also simplify the construction of the entrance
flux box whereby I am enabled to save space and coating metal surface in
the pot.
One suitable form of apparatus for operating in the novel manner described is as
follows. On a spindle which may suitably be rotated from the roll driving shaft
for instance by sprocket wheels and chain is fixed a groove cam and a plain cam.
In the groove cam works a bowl which is fitted to a lever having its fulcrum at
one end while its other end is connected to the nipping appliance by means of a
block which can be adjusted according to different depths of plate to be coated.
The cam groove is so shaped as to accomplish the aforesaid movements of the
nipping appliance. The plain can operates against one arm of a bellcrank lever
the other arm of which actuates the canting appliance. The adjustment for
nipping plates of different thicknesses is effected by a nut on a screwed rod forming
a part of the nipping appliance and fitted with a helical spring for giving the
required yielding pressure, such nut and spring being outside of the pot. The
helical spring also serves for a yielding connection by means of a link to one lever
on a small weigh shaft, another lever on the same being acted on by an adjustable
set screw on a fixed snug on the cam shaft bearing. This weigh shaft which may
be a round bar with bent ends forming the levers is attached to the aforesaid cam
bowl lever so as to partake of its motion and serves to open the nippers while the
small helical spring serves to close them at the required times. The entrance flux
box heretofore made with four sides I prefer to make with three that is to say I
omit the side against the exit grease hopper and attach it thereto by lugs and slots
in the usual manner; by this means I save space and coating metal surface in the
pot and cheapen the manufacture of the flux box.
Dated this 11th day of November 1893.

page_text: Improvements in Apparatus for Coating with Tin, Lead, or other
Metals or Alloys of same.
I, HENRY FRANCIS TAYLOR, of Tynant, Neath, in the County of Glamorgan,
Engineer, 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:-
These improvements refer to apparatus operating in a novel manner and serving
to mechanically or automatically carry the plate down into the pot and cant it and
raise it so that the rolls on the exit side of the pot may take hold of it and carry it
up and out of the machine.
According to this invention the plate to be coated is by the workman inserted
between the open jaws of a nipping appliance which then by suitable machinery
is closed and depressed for the plate to be coated in the tin or other metal or
alloy. The plate is then canted and raised while still being held in proper
position by the nipping appliance (which never rises out of the coating medium)
and after the plate has been taken hold of by the rolls the nippers are returned
to their original position and opened ready to receive the next plate. All this
is done mechanically or automatically. Moreover (and this forms an important
part of my invention) in the mechanism operating as described I provide means
for adjusting the opening of the nippers according to the thickness of the plate
to be coated and I afford great facility for effecting this adjustment by doing it
outside of the pot. I also provide means for regulating the time of opening the
nippers in the upstroke for receiving the plate and also the time of closing them
in the down stroke. I also simplify the construction of the entrance flux box
whereby I am enabled to save space and coating metal surface in the pot.
One suitable form of apparatus for operating in the novel mauner described is
illustrated in the vertical cross-section Figure 1, the vertical longitudinal section
Figure 2, and the plan Figure 3; Figure 4 is enlarged side view and Figure 5
sectional end view of the appliance for opening and closing the nippers wherein the
plate to be coated is inserted.
On a spindle W which may suitably be rotated from the roll driving shaft, by
instance by sprocket wheels S and T and chain U, is fixed a groove cam G and a
plain cam F. For changing the speed of the cam shaft W to suit different depths
of plates so as to bring up the plates as near to each other as required for the
maximum output I use a very simple and efficient arrangement whereby a screw is
merely slackened so that the sprocket wheel T can be slipped off and another
substituted which is again fixed by means of a screw.
a bowl which is fitted to a lever H having its fulcrum at one end H' while its other
In the groove cam G works
end is connected to the nipping appliance by means of a block I which by means of
the set screw J' can be adjusted according to different depths of plate to be
coated. The link O is then exchanged for another of the required different length,
or the link may be made with holes O' answering to the different depths. The cam
groove is so shaped as to accomplish the aforesaid movements of the nipping
appliance that is to say for producing the highest possible amount of output by the
plates following each other quite closely, and so that the speed of motion both in
the up and down passage of the plate shall be varied according to requirements.
Thus in the top position the nipper fingers being open to receive the plate the
latter is inserted and the nippers then close while commencing to descend, the speed
being such as to allow the plate to "take the tin" and such speed is slightly
accelerated after the plate has passed through the flux. In the upstroke the speed
is sharply accelerated until the plate is brought nearly into the nip of the bottom

page_text: pair of rolls R whereupon it is slowed to such a degree that the rolls shall take the
plate out of the nippers, and the upward motion of the latter is continued to the top,
the nippers meanwhile being opened to receive a fresh plate and so on.
The plain cam F operates against one arm E of a bell crank lever the other
arm E of which actuates the gate D of the canting appliance which by preference
is made much shorter or shallower than heretofore having in fact its fulcrum at Z
some distance from the bottom of the pot, thus minimizing the amount of throw and
the consequent agitation of the metal by its movements. The adjustment for
nipping plates of different thicknesses is as shown more particularly in Figures 4
and 5 effected by a nut X on a screwed rod L forming a part of the nipping
appliance and fitted with a helical spring M for giving the required yielding
pressure such nut and spring being outside of the pot. The helical spring also
serves for a yielding connection by means of the link O to one lever N on a small
weigh shaft N', another lever N on the same being acted on by an adjustable stop
or a set screw P on a fixed snug P1 on the cam shaft bearing P. This weigh
shaft N' which may be a round bar with bent ends forming the levers as shown is
attached to the aforesaid cam bowl lever H so as to partake of its motion and serves
to open the nippers while the small helical spring M serves to close them at the
required times. The lever end N2 of the spindle N¹ under the arm H may be so
arranged with a catch or trigger as shewn in Figure 6 and 7 that the nippers would
be opened as before described in the upper part of its upward movement and by
allowing the trigger N* which is jointed to the end of lever N2 to pass or slip by
the flat adjustable stop P³ on the bracket P'; the nippers would then close on the
top part of its stroke taking the plate from the tongs sooner than by the arrange-
ment described with reference to Figure 4. Figure 6 shews the position of the
trigger N* in the upstroke ready for opening the nipper finger K. Figure 7 shews
the position of the trigger N* in its descent after it has come to the end of its
upstroke and passed the stop P, the plate having been inserted and nipped.
H Figure 6 is the bowl which works in the groove cam G. The plate having been
raised into the nip of the lowest pair of rolls R is by them and the next following
pair or pairs carried up and out of the machine where it is taken hold of and
removed by a boy or by some mechanical contrivance. The upper pair or pairs of
rolls are provided with troughs R' supplied with clear finishing metal as described
and claimed in Morewood's Patent Specifications 3125 and 3126 of 1873. But in
order to prevent any overflowing metal from one pair of troughs running into the
nip of the next lower pair of rolls 1 form the troughs with a triangular rib R* on
the underside so placed that the drip therefrom shall come over the descending side
of the roll below it and run down into the next lower trough and ultimately into
the pot below and without unduly adding to the thickness of coating on the plate
as was heretofore the case when troughs were used.
The entrance flux box heretofore made with four sides I prefer to make with
three that is to say I omit the side against the exit grease hopper B and attach it
thereto by lugs and slots in the usual manner. By this means I save space and
coating metal surface in the pot and cheapen the manufacture of the flux box and
making it lighter for the tinmen to remove when necessary. Or if the inner side is
retained I carry it down to a less depth into the molten metal than heretofore as
shown in Figure 1.
By my aforesaid improvements I economize time, labour and coating material
while producing coated plates of excellent quality with a minimum consumption of
material.
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. The application and use, in apparatus for coating with tin, lead or other metals
or alloys of same, of means for mechanically closing the nippers after the plate has

page_text: upward stroke until the plate is caught and raised by the rolls out of their grip after
which the nippers open to receive a fresh plate.
2. The application and use in apparatus for coating with tin, lead or other metals
or alloys of same, of cam gear so proportioned and arranged that the speed of the
plate receiving nipping appliance is varied during its descent and ascent substantially
in the manner and for the purpose described.
3. For automatic or mechanically worked nippers for taking down the plate to be
coated the application and use of means outside the pot for accurately adjusting as
required the degree of grip.
4. The construction of apparatus described and shewn.
3th day of August 1894.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.