A Double or Reverse Cam-block Fastener for Securing Skylights, Flaps, and the like in an Open or Closed State.
Year: 1887

page_text: Date of Application, 26th Mar., 1887
Complete Left, 27th Dec., 1887
Complete Accepted, 10th Feb., 1888
A Double or Reverse Cam-block Fastener for Securing Skylights,
Flaps, and the like in an Open or Closed State.
1. EDWARD NUNAN of 166 Fleet Street, in the City of London, Gentleman, do
hereby declare the nature of this invention to be as follows:-
The object of this invention, is to construct a block with a reverse camformation
and so weighted and pivotted that when thrown to either side of its centre, one of the
cams comes into action to retain a skylight in the required position.
The block is so fitted that the bar (quadrant or other) runs through it and as the
skylight or flap is lifted by a rod or other appliance one of the cams engages against
the quadrant bar which fixes the sash at the position to which it is lifted.
For closing the sash, it is lifted to bring a stud on the bar into contact with the
block and throw it over into its second position to bring the other cam into action,
the sash being then lowered, this cam automatically secures the sash and prevents it
being opened from the outside.
H. GARDNER,
166, Fleet Street, London,
Agent for the said E. Nunan.

page_text: Flaps, and the like in an Open or Closed State.
1 EDWARD NUNAN of 166 Fleet Street, in the city of London Gentleman do
hereby declare the nature of my said 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 this invention is to construct a block A see Figures 1 and 2 of the
annexed drawings, with a reverse cam formation B, C, and weighted at D and pivotted
by arms or pins E, E, so that when thrown to either side of its centre, one of the
cams comes into action against a quadrant F or bar G to retain a skylight H in the
required position (if applied to a skylight).
The block A is carried by a strap I loosely fitted in a forked socket plate H'
attached to the frame H2 to enable the quadrant F or bar G to adjust itself to the
desired angle. The bar, (quadrant or other) runs through the strap I and as the
skylight or flap H is lifted by a rod or other appliance as at Figure 3, or by an
action direct on the quadrant F or bar G, one of the cams ie. B, engages against
the quadrant F or bar G which fixes the sash H at the position to which it is lifted.
For closing the sash it is lifted sufficiently high to bring a stud J on the quadrant
or bar into contact with the block A which is grooved at K as a guide for the stud J
to enter, to throw the block A over into its second position, as at Figure 4, to bring
the other cam, i.e. C, into action, the sash being then lowered, this cam Cantomatically
secures the sash and prevents it being opened from the outside.
The cam portions of the block A may be roughened or scored to increase the grip
upon or against the quadrant or bar.
in
Having now particularly described and ascertained the nature of this invention and
what manner the same is to be performed I declare that what I claim is :-
The double or reverse cam block A arranged substantially as shown in the annexed
drawings as a fastener for skylights, flaps, and the like as described.
Tha DIKh day of Loconther
The 18th day of Triennlhar
H. GARDNER,
166, Fleet Street, London,
Agent for the said Edward Nunan.
H. GARDNER,
166, Fleet Street, London,
Agent for the said Edward Nunan.