Improved Apparatus for Opening and Closing Skylights and the like.
Year: 1895

page_text: Date of Application, 21st June, 1895
Complete Specification Left, 18th Mar., 1896-Accepted, 18th Apr., 1896
PROVISIONAL SPECIFICATION.
Improved Apparatus for Opening and Closing Skylights and
the like.
HENRY DOBSON 5 Lamport Street Hebburn-on-Tyne County Durham
Foreman Brass Finisher do hereby declare the nature of this invention to be as
follows:-
The invention has for its object, a sashlift or quadrant for ships skylights or
other structures which can be worked by means of cords and pulleys from any
convenient place, beneath the skylight and which will automatically support the
skylight flap directly upon the raising cords being released from lifting the same.
A quadrant constructed in accordance with my invention is represented by the
annexed drawings Figure I is a side elevation of the quadrant, Figure II is a
front elevation of same Figure III is a plan (partly in section) showing the
bracket fixed on skylight side and the automatic arrangement for catching the
quadrant.
The quadrant is made of brass or other suitable material.
A on drawings is an eye plate attached to the skylight flap. The rod B is
attached to the jaw of the eye plate A by means of a bolt and hinges at this point
to accommodate itself to the various angles which the skylight flap may be raised
to. C is a plate fixed to the skylight side having a jaw containing two pulleys:
marked D and a slieve marked E which the quadrant rod B passes through,.
a bottom knob F is screwed into the slieve E. Inside the bottom knob F, is a
spring G, which exerts a pressure on the pin H, and causes it to spring into the
holes shown in the quadrant bar B. Inside the knob F a chain J, is attached to
the pin H. The chain J, is attached to the cord K, outside the knob F; at the
bottom end of the quadrant a pulley L is attached. This pulley works on a pin.
with an eye on one end, to which is attached the end of the cord M.
The method of working is as follows:-
To raise the skylight flap pull the end of cord K to take the pin H out of the
hole in the quadrant bar B, with the other hand pull the cord N which passes over
the pulleys D and L and is attached at the end M to the eye on the pin of the
pulley L, having raised the skylight flap by this means, a little above the required
height, let go both parts of the cord and the skylight flap will fall by its own
weight until the pin H comes opposite a hole in the quadrant B at which point the
pressure of the spring G automatically forces the pin H into the hole in the
quadrant bar B and supports the skylight flap at this point.
Dated this Twenty-first day of June 1895.

page_text: CUMI LEIE
DIECIFICATION.
Improved Apparatus for Opening and Closing Skylights and
the like.
I HENRY DOBSON 5 Lamport Street Hebburn-on-Tyne County Durham
Foreman Brass Finisher 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 invention has for its object a quadrant for a ships skylight or the like,
which can be worked by means of cords and pulleys from any convenient place
beneath the skylight, and which will automatically support the skylight flap
directly upon the raising cords being released from lifting the same.
A quadrant constructed in accordance with my invention is represented by the
drawings left with the Provisional Specification No. 12056 on 21st June 1895.
Figure I is a side elevation of the quadrant.
Figure II is a front elevation of the quadrant.
Figure III is a plan (partly in section) showing the bracket fixed on the
skylight side, and the automatic arrangement for catching the quadrant.
The quadrant is made of brass or other suitable material.
A is an eye plate attached to the skylight flap, the rod B is attached to the jaw
of the eye plate A by means of a bolt and hinges at this point to accommodate
itself to the various angles which the skylight flap may be raised to. C is a plate
fixed to the skylight side having a jaw containing 2 pulleys marked D and a slieve
marked E which the quadrant rod B passes through, a hollow knob F is screwed
into the slieve E. Inside the hollow knob F is a spring G which exerts a pressure
on the pin H and causes it to spring into the holes shown in the quadrant rod B.
Inside the knob F a chain J is attached to the pin H. The chain J is attached to
the cord K outside the knob F. At the bottom end of the quadrant a pulley Lis
attached, this pulley works on a pin with an eye on one end to which is attached
the end of the cord M.
The method of working is as follows:-
To raise the skylight flap, with one hand pull the end of the cord K to take the
pin H out of the hole in the quadrant rod B with the other hand pull the cord N
which passes over the pulleys D and L and is attached at the end M to the eye of
the pin of the pulley L having raised the skylight flap by this means a little above
the required height let go both parts of the cord and the flap will fall by its own
weight until the pin H comes opposite a hole in the quadrant rod B at which point
the pressure of the spring G automatically forces the pin H into the hole in the
quadrant rod B and supports the skylight flap at this point.
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 my
claim is :-
A quadrant for working the flaps of skylights and similar contrivances which is
held in position by a pin attached by a spring and arranged to automatically check
the fall of the flap.
Dated this Somantranth day of March 1904