Improvements in or relating to the Manufacture of Carriage Lamps.
Year: 1892

page_text: Date of Application, 3rd Mar., 1892
Complete Specification Left, 14th Nov., 1892-Accepted, 3rd Mar., 1893
PROVISIONAL SPECIFICATION.
Improvements in or relating to the Manufacture of Carriage
Lamps.
JOHN WATHEX Globe Works 120, Barford Street Birmingham, Die Sinker &
Tool Maker &c. do hereby declare the nature of this invention to be as follows:-
The object of my invention is the production of certain parts of carriage lamps
by machinery instead of by hand as formerly, thereby producing the said parts
much better and more quickly. For this purpose I make the various parts so as
to either entirely dispense with, or to require, much less soldering, thus producing
lamps cheaper and less subject to be affected by heat. The round, oval, or other
suitable shapes, which it has been usual to form out of several separate parts,
I make in one, perforating the same where required.
The parts having sharp corners or shoulders, I construct tools to force the
edges or shoulders into the desired degree of fit or register, to bring the said
edges or shoulders into close and exact contact.
The said tools, in the first place consist of dies having the requisite number
of steps or ledges forming bands in the resulting stampings, shaped ready for
perforation.
For attaining the object in the second part of my invention I construct a pair
of press tools with a series of indented steps, to give the necessary shape to the
parts required to fit together. Again dies forming beds into which blanks of
the necessary contour, are forced into the shape required.
Dated this 2nd dow of March 1905
JOHN WATHEN.
COMPLETE SPECIFICATION.
Improvements in or relating to the Manufacture of Carriage
Lamps.
JOHN WATHEN, Globe Works, 120 Barford Street, Birmingham, Die Sinker &
Tool Maker &c. 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 :-
The object of my invention is the production of certain parts of carriage lamps
by machinery instead of by hand as formerly, thereby producing the said parts
much better and more quickly. For this purpose I make the various parts so as to
either entirely dispense with or to require much less soldering this producing
lamps cheaper and less subject to be affected by heat.
The round, oval or other suitable shapes which it has been usual to form out of
several separate parts, I make in one, perforating the same where required.
For the attainment of the objects of my invention, in the first place I construct,
in the ordinary manner, tools or dies in series or otherwise, in which I press or
stamp my improved lamp parts, the said tools or dies are formed with cavities of
the required shape or contour, and having the necessary number of steps or ledges,
to produce the particular lamp part or parts all in one piece, the said part or parts
are completed as herein afterwards described. Further 1 ensure perfect fit or
register by means of my improvements and at the same time, the lamps made
according to my invention are not liable to be fractured by the vibration caused by
the vehicle travelling over the roads.
In the second place I construct a pair or pairs of press tools of known con-
struction, but so shaped or wrought, that they are of the exact shape of the lamp

page_text: parts which have steps, ledges or bands, the edges of which, according to my
invention are to be brought into close or exact contact, for the purpose of dispensing
with much of the soldering used in the prevailing methods used in the construction
of these articles, thus producing much better and more durable carriage lamps.
I will now proceed to describe with reference to the accompanying drawings the
manner in which my invention may be performed.
Figure 1. represents a side view of the oval or other shape top of a carriage
lamp. In lamps of known construction, a is a shallow top, is a perforated band
and is a stamped rim, all these three pieces are separate and have to be soldered
together. Hence being at the top of the lamp over the light, are liable to be so
affected by the heat, that the top falls to pieces if over heated. In constructing
the cap according to my invention, these three parts are made in one piece.
Figure 2. shows the side view of the cap as I construct it of one piece, and also
the shape of the recess or cavity of the die or tool into which it is stamped all in
one piece. The band of the cap is then perforated, and the finished shape or
contour is produced by means of a small wheeling machine, with wheels upon the
periphery of which, the desired contour has been turned or wrought. The same
letters of reference indicate the same parts in both figures.
Figure 3. represents the side view of the carriage lamp bottom plates and barrel
which fits into the carriage socket, constructed according to my invention all in one
piece. The parts indicated by the letters d. e & f. it has been usual to make in
separate pieces. All these parts I construct of one blank or piece of sheet metal,
gradually working the blank through a series of drafting dies into the finishing die,
the recess or cavity in which is the exact shape as shown in Figure 3. Thus
I produce the plates and barrels of such exactness that perfect fit is insured.
Figures 4.5 and 6. represent the square carriage lamp cap constructed according
to my invention.
Figure 4. shows the blank or piece of sheet tin-plate cut into the necessary shape
or contour. This is placed in the set edge in the die or tool which is to corrugate
the two sides 1, 2 and throw up the other sides g¹g as represented by Figure 5.
The corrugated sides ¹² I then force upwards by means of press tools having the
necessary steps or contour, so that the edges come into contact with, or close
proximity at the corners to the edges of g', g, as shown by Figure 6. By these
means these right angled corners are brought into such exact register that very
little soldering is required. It will be observed that carriage lamps manufactured
in accordance with my improvements possess the great advantage of reducing or
entirely dispensing with soldering in places liable to be affected by the heat from
the light in the lamp at the same time reducing considerably, the labour in making
up the lamps.
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
1st. The construction of carriage lamp caps arranged to make more perfect
lamps, and to prevent the injury of the said caps by heat, substantially as, and for
the purpose described (Figs. 1 and 2).
2nd. The construction of carriage lamp bottom plates and barrels mainly or
entirely in one piece, arranged to give perfect fit, and not liable to be fractured by
the vibration of the carriage travelling over our roads, substantially as and for the
purpose described (Fig. 3).
3rd. The construction of carriage lamp caps having right angled corners, so that
at the said corners the edges are brought into exact fit or register, substantially as,
and for the purpose described. (Figs. 4, 5 and 6.)
Dated this Twelfth day of November 1802
JOHN WATHEN.