IMPROVEMENTS IN SASH FASTENINGS
Year: 1879

page_text: PROVISIONAL SPECIFICATION left by Edward John James Comer and
Benjamin Walton at the Office of the Commissioners of Patents on the
26th April 1879.
EDWARD JOHN JAMES COMER, of Vauxhall, in the County of Surrey, Engineer,
and BENJAMIN WALTON, of Chester Street, Kennington, in the same County,
Engineer. “IMPROVEMENTS IN SASH FASTENINGS."
This Invention has for its object improvements in sash fastenings, whereby not
only is far greater security afforded, but also far greater simplicity of construction
combined with economy in the cost of manufacture and production is obtained
than has hitherto been practicable.
Our improved sash fastening consists of two separate levers, forming togethor a
double action lever, each of which levers are attached to and work upon a suitable
metal base plate affixed to the upper and lower sashes in the ordinary manner.
Upon the hinder base plate which is affixed to the upper sash a suitable stop
pin or stud is formed in order to prevent the secondary lever which is attached
thereto revolving too far when actuated by the first or primary lever as presently
described. Such secondary lever is of an eccentric shape, terminating in a short
curved tail piece, and having a flange or shoulder formed thereon which serves to
adjust the sashes in position when the sash fastening is closed.
The primary lever which is affixed to the base plate on the bottom sash is made
of a hook shape at its upper extremity, in order to lock into the recess beneath the
Aange or shoulder formed in the secondary lever as already described when closed,
and by which means it forces the respective sashes into proper position, while its
lower extremity terminates in a tail piece which is curved outwards in the reverse
direction to the tail piece of the secondary lever, and is provided with a knob or
other suitable projection so as to afford a convenient purchase over the same.
Both the levers are centred or pivotted on screws or otherwise conveniently
secured to their respective base plates, so as to allow of their working freely and
easily to and fro.
The operation of our improved sash fastening is as follows:-When the tail piece
of the primary lever is pulled forward it comes in contact with the tail piece of the
secondary or hinder lever, and so the same is forced backwards and the catch is
released and permits the window to be opened, while in order to again close the
same it is only necessary to close the sashes and pull back the tail piece of the

page_text: front or primary lever, thus forcing the secondary lever forward when the hook
formed in the upper extremity of the front lever takes into the groove beneath
the flange or shoulder formed on the hinder or secondary lever, as before mentioned,
and so the fastening is securely closed.
One great advantage of our improved double lever sash fastener is that it is
practically impossible to open the same from the outside as the greater the efforts
employed to do so the more tightly it becomes secured.
Another advantage is that it adjusts the window sashes accurately to their
proper position when closed, thus preventing the chattering and drafts now so
frequently experienced where other sash fasteners are used after they have been in
use for a short time.