IMPROVEMENTS IN CASTIRON SKYLIGHT FRAMES
Year: 1884

page_text: We, HUGH STEVEN, of the firm of McDowall Steven and Company Milton Iron
Works, Glasgow, in the County of Lanark, North Britain, Ironfounder, and JAMES
WALKER, of the same place Foreman Patternmaker, do hereby declare the nature
of our said Invention for "IMPROVEMENTS IN CASTIRON SKYLIGHT FRAMES" and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
Our said Invention has for its object to combine the fixed and movable parts of
castiron skylight frames in an improved manner and so that the skylight cannot
be opened from the outside by unscrewing or removing joint pins.
The improvements are shown on the accompanying Sheet of explanatory
Drawings and hereinafter particularly described. Figure, 1, is a plan and
Figure, 2, a side elevation, both figures representing the skylight as open.
Figure, 3, is a transverse section of the fixed frame as taken through the lugs to
which the movable frame is hinged or jointed. Figures, 4 and 5, are an elevation
and section of one of the joint lugs as enlarged.
The movable or opening frame, A, which is shaped in the ordinary way for
being glazed, is cast with joint pins, B, by means of which it is hinged to the lower
frame, C, this lower frame being fixed in a roof in the ordinary way. The joint
pins, B, are entered into eyes or bearings in lugs, D, E, one, D, of which is
represented as cast on the lower frame, C. To allow of the movable frame, A,
being got into its place the other, E, of the lugs is made in a separate piece to be
fixed to the lower frame, C, after the movable frame, A, has been got into its place.
For the purpose of fixing the separate lug, E, it is cast with a screw nut, F, inside
of it and a screw pin, G, is screwed from the underside of the lower frame, C, up
into the lug, E, and into its nut, F.
Both lugs, D, E, may be made separate from the lower frame, C, and may be secured
in the same way. Instead of casting the lug upon a nut, F, the lug may have an
internal screw thread tapped in it for the screw pin, G; or the lug may be formed
with or cast upon a pin arranged to project down through a hole in the lower
frame, C, and to receive a screw nut on the underside of that frame.
We do not restrict ourselves to the precise details hereinbefore described and
shown in the accompanying Drawings provided the distinctive feature of our

page_text: Invention is retained this being-the hinging of a movable castiron skylight frame
to its fixed frame by joint pins cast on the movable frame and engaging in lugs,
one or each of which is secured to the fixed frame by a screw pin or nut accessible
only from the underside of the fixed frame.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed, we declare that
what we claim is :-
The hinging of a movable castiron skylight frame to its fixed frame by joint pins
cast on the movable frame and engaging in lugs, one or each of which is secured to
the fixed frame by a screw pin or nut accessible only from the underside of the
fixed frame, substantially as hereinbefore described.
Dated this Fifteenth day of May 1884.
EDMUND HUNT,
Applicants' Agent,