Year: 1888

page_text: I, JOHN GRICE STATTER, of Alliance Engineering Works, West Drayton, Electrical
Engineer, do hereby declare the nature of this invention to be as follows:-
In the Complete Specification accompanying my Letters Patent No. 7,530 of the
year 1887, hereinafter referred to as my "former specification," I described and
illustrated with reference to figures 6 and 7 of the drawings certain forms of
simple Ẹ shaped plates formed of a single piece of sheet iron and which entirely
surround and separate the two spaces in which the coils lie and which I shall herein-
after term the internal spaces. Being in one piece it would be impossible to place
these plates in position with respect to the coils were it not that they are divided in
two places as shown in the figures by the lines 00. In my present invention [
employ in the construction of my transformers plates resembling those just described
in this respect that their two internal spaces are entirely surrounded and separated
but which differ therefrom in that they do not necessarily require to be divided in two
places as in the figures above mentioned but in one place only and that in the part,
hereinafter for the purpose of this specification called the tongue, which separates the
two internal spaces and which part corresponds with the central projection of the
E shaped plates before mentioned. I may divide the tongue at any convenient part
as for example by a dividing cut at one end thereof extending between the two
internal spaces. Such a form of plate may conveniently be termed a
"buckle shaped
plato" from its greater or less resemblance to a common form of buckle used for
fastening straps or belts.
My complete transformer is similar to that set forth in my said former specification
except that in its construction buckle shaped plates are employed instead of E shaped
plates or compound plates.
In building up my transformer I may bend back the tongue thrust it through the
central opening of the coils and then pass the rest of the plate over the outside of the
coils bringing the tongue and the rest of the plate into the same plane again. Or
after bending back the tongue the rest of the plate may first be passed over the outside
of the coils and the tongue then sprung into position in the central opening of the

page_text: coils. It will be obvious however that I cannot place the whole of my plates in posi-
tion in this latter manner as after a greater or lesser number of plates depending on
the size of the transformer have been placed in position there will be no room for the
tongue to be sprung back into the central opening.
I have stated that a point of difference between my buckle shaped plate and the
forms of E shaped plate shown in figures 6 and 7 of my former specification lies in
the fact that whilst the latter have necessarily two dividing cuts the former have not
necessarily more than one. The buckle shaped plates may however if desired have
in addition to the dividing cut in the tongue a dividing cut at another part as for
example a dividing cut at a part corresponding with one of the cuts shown in figure 6
of my said former specification.
J. G. LORRAIN, M.S.T.E., M. Inst. M.E.,
Consulting Electrician and Patent Agent,
Norfolk House, Norfolk Street, London, W.C.,
Agent for Applicant.

page_text: I, JOHN GRICE STATTER, of Alliance Engineering Works, West Drayton, Electrical
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:-
In the Complete Specification accompanying my Letters Patent No. 7,530 of the
year 1887, hereinafter referred to as my "former specification," I describe and
illustrate with reference to figures 6 and 7 of the drawings certain forms of simple
E shaped plates formed of a single picco of sheet iron and which entirely surround
and separate the two spaces in which the coils lie and which I shall hereinafter term
the internal spaces. Being in one piece it would be impossible to place these plates
in position with respect to the coils were it not that they are divided in two places as
shown in the figures by the lines 0 0. In my present invention I employ in the
construction of my transformers plates resembling those just described in this respect
that their two internal spaces are entirely surrounded and separated but which differ.
therefrom in that they do not necessarily require to be divided in two places as in the
figures above mentioned but in one place only and that in the part, hereinafter for the
purpose of this specification called the tongue, which separates the two internal
spaces and which part corresponds with the central projection of the E shaped plates
before mentioned. I divido this tongue at any convenient part as for example by a
dividing cut at one end thereof extending between the two internal spaces. Such a
form of plate may conveniently be termed a "buckle shaped plate" from its greater
or less resemblance to a common form of buckle used for fastening straps or belts.
Such a form of plate is shown in the accompanying drawing in which it will be
seen that the plate is formed of a single sheet, that the internal spaces are entirely
surrounded by the iron, and that the plate has only one dividing cut that being
situated on the tongue and indicated by the letter a.
My complete transformer is similar to that set forth in my said former specification
except that in its construction buckle shaped plates are employed instead of E shaped
plates or compound plates.
In building up my transformer I may bend back the tongue, thrust it through the
central opening of the coils, and then pass the rest of the plate over the outside of
the coils, bringing the tongue and the rest of the plate into the same plane again.
Or, after bending back the tongue, the rest of the plate may first be passed over the
outside of the coils, and the tongue then sprung into position in the central opening
of the coils. It will be obvious however that I cannot place the whole of my plates
in position in this latter manner, as, after a greater or lesser number, depending on
the size of the transformer, have been placed in position, there will be no room for
the tongue to be sprung back into the central opening. In practico I prefer to place
the plates in position in the manner first mentioned.

page_text: 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. Electrical transformers in the construction of which buckle shaped plates are
employed substantially as described.
2. Buckle shaped plates substantially as and for the purpose set forth.
3. The specific form of buckle shaped plate illustrated in the accompanying
drawing.
Dated in 7th day
TH: 7th day
1000
For the Applicant,
J. G. LORRAIN, M.S.T.E., M. Inst. M.E.,
Consulting Electrical Engineer and Patent Agent,
Norfolk House, Norfolk Street, London, W.C.