Improvements in Wooden Casings for Electrical Conductors.
Year: 1889

page_text: Late of Application, 4th Apr., 1889
Complete Specification Left, 4th Feb., 1890-Accepted, 8th Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in Wooden Casings for Electrical Conductors.
I, WALKER GEORGE DE FORGES GARLAND, of Palace Road, East Moulsey, in the
County of Surrey, Timber Merchant, do hereby declare the nature of this invention
to be as follows:-
This invention relates to the construction of wooden casings for electrical con-
ductors whereby the fixing of such casings or protective coverings is facilitated, and
the risk of injury to the insulation, owing to the nails or screws employed to secure
the work coming in contact with the wires, is prevented.
A wooden casing for enclosing electrical conductors constructed according to the
mode in which I prefer to carry out my invention consists of three parts. The first
part, which is designed to he permanently fixed in position, is formed of a strip of
wood having two longitudinal grooves in its outer face adapted for the reception of
the wires. Each edge of the strip is provided towards its outer face with a projecting
lip which fits a groove formed in each of the covering pieces constituting the other
parts of the casing, these pieces being applied laterally and meeting over the centre
of the fixed strip. The abutting edges of the covering pieces may be tongued and
grooved, and are secured in position by external clips, hooks or equivalent appliances.
The fixed strip is secured in position by means of nails or screws inserted between
the grooves wherein the wires are laid.
The outer edges of the fixed strip, instead of being formed with laterally-projecting
lips, may be bevelled, the wider face being outwards, in which case the sides of the
covering pieces are formed to correspond; the edges of the latter engaging behind
the inclined sides of the fixed strip. The outer surface of the covering pieces may
be moulded to any ornamental pattern desired.
According to a modified method of construction, the casing consists of two parts
which are identical in cross section, economy in manufacture being, thereby secured.
Each of these parts is grooved longitudinally as before described, and has a laterally-
projecting lip on one side and a corresponding recess on the other side; so that,
when one of the parts is turned round in relation to the other part, the projecting
lip of each part occupies the recess in the other part.
For use in certain positions, as for example on ceilings, I provide means for.
retaining the wires in position in their grooves pending the application of the .
covering piece or pieces; such means consisting of a strip fastened centrally
and extending across the two grooves, the height of the intervening portion being.
suitably reduced.
Dated thin 14h Jac A1 1000
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Wooden Casings for Electrical Conductors.
I, WALKER GEORGE DE FORGÉS GARLAND, of Palace Road, East Moulsey, in the
County of Surrey, Timber Merchant, 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 the construction of wooden casings for electrical con-
ductors whereby the fixing of such casings or protective coverings is facilitated,
and the risk of injury to the insulation, owing to the nails or screws employed to
secure the work coming in contact with the wires, is prevented.

page_text: In the accompanying drawings, Fig. 1 represents in side elevation a portion of a
wooden casing for enclosing.electrical conductors constructed according to the mode in
which I prefer to carry out my invention; Fig. 2 being a corresponding transverse
section. Figs. 3 to 7 are views illustrating sundry modifications.
The casings shewn in Figs. 1 and 2 consists of three parts. The first part, which
is designed to be permanently fixed in position, is formed of a strip of wood A
having two longitudinal grooves a and a¹ in its outer face adapted for the reception of
the wires. Each edge of the strip is provided towards its outer face with a projecting
lip a. A groove is formed in each of the covering pieces Band B' which together
constitute the other member of the casing; these pieces being applied laterally and
meeting over the centre of the fixed member. Each lip a² fits and lies within one
of the grooves. The abutting edges band of the covering pieces, which may be
tongued and grooved as illustrated in Figs. 1, 2 and 3, are secured in position by
external clips, hooks or equivalent appliances (not shewn in the drawings). The
strip A is fixed by means of nails or screws inserted between the grooves a and a¹.
In Fig. 3, the outer edges of the strip A, instead of being formed with laterally
projecting lips a², are bevelled; the wider face of the strip being outwards. The
sides 62 and 3 of the covering pieces are formed to correspond; their edges engaging
behind the inclined sides of the fixed strip. The outer surface of each covering
piece may be moulded to any ornamental pattern desired.
In Figs. 4 to 7, the covering member is formed in one piece instead of in two
pieces; the fixed member A being grooved longitudinally as before described. In
Fig. 4, one edge of the piece B2 is first slipped into the groove a³, and the piece is
then moved laterally and its opposite edge caused to enter the corresponding groove
provided towards the opposite side of the fixed member. It will be seen that the
former groove is much deeper than the latter, in order that, after insertion, the
covering piece B2 may be properly held in position by the engagement of both its
eilges. In Fig. 5, the part A has a laterally projecting lip a¹ on one side and a
corresponding recess or groove on the other side; the piece B2 having a lip & on
one side and a corresponding groove on the other side. The lip & fits in the groove
in the part A; the groove in the piece B³ fitting over the lip a. The construc-
tion shewn in Fig. 6 is almost identical with that shewn in Fig. 5; the outer face
of B3 being, however, plain instead of moulded. In Fig. 7, the lip a' and the groove
in the part B3 are dispensed with; the parts A and B³ being fastened together on
one side of the casing by a hook c, clip or equivalent appliance.
For use in certain positions, as, for example, on ceilings, I provide means for
retaining the wires in position in their grooves pending the application of the
covering piece or pieces; such means consisting of a strip fastened centrally and
extending across the two grooves, the height of the intervening portion being suitably
reduced.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I claim :-
A wooden, casing or protective covering for electrical conductors adapted for being
readily fixed in position without risk of injury to the insulation, substantially as
described with reference to the accompanying drawings; the same comprising a
grooved fixed part and a removeable covering piece (or pieces) suitable for being
applied laterally to the said fixed part and for engaging therewith.
Dated this 4th day of February 1890.
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Agent for the Applicant.