An Improved Construction of Joint for Swing Looking Glasses and the like.
Year: 1885

page_text: An Improved Construction of Joint for Swing Looking Glasses
and the like.
I EDWARD NUNAN, of 166 Fleet Street, London, Gentleman, do hereby declare
the nature of my said invention for AN IMPROVED CONSTRUCTION OF JOINT, FOR
SWING LOOKING GLASSES AND THE LIKE, to be as follows:-
The object of this invention is, to so arrange or construct the joint plates of
swing looking glasses or mirrors, and also of other frames, that are necessary to be
set to any desired angle, in such a manner, that an instantaneous lock shall take
place between said plates, at whatever angle they may be placed at or shifted to.
For the purpose of my invention I form one of the joint plates with an inner
groove between the face portion and the back. The side edges of the groove are
inclined or tapered from the mouth, which receives a circular disc like button
projecting from the other joint plate. This button has a flat, a circular, a V shaped,
or a milled edge, or a band, may be inserted between the button and the incline or
taper. The ends of the band are so formed, that they press against the incline or
taper to more rigidly hold the button.
H. GARDNER,
166, Fleet Street, London,
Agent for the said E. Nunan.

page_text: COMPLETE SPECIFICATION.
An Improved Construction of Joint for Swing Looking Glasses
and the like.
I EDWARD NUNAN of 166 Fleet Street, London, Gentleman 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 object of this invention is, to so arrange or construct the joint plates of
swing looking glasses or mirrors and also of other frames that are necessary to set
to any desired angle, in such a manner that an instantaneous lock shall take place
between said plates at whatever angle they may be placed at or shifted to.
For the purpose of my invention which is represented by the annexed sheet of
drawings I for one of the joint plates A with an inner groove B between the face
portions C and the back D. The side edges of the groove B are inclined or tapered
from the mouth E which receives a circular disc like button F projecting from the
other joint plate G. This button F has a flat, a circular a V shaped or a milled
edge, or a band may be inserted between the button and the incline or taper.
The ends of the band are so formed that they press against the incline or taper
to more rigidly hold the button.
Figure 1 shows the joint plates A and G with the button F having a flat or
square periphery and Figure 2 is a view showing the two joint plates in position
and secured by a cheese headed screw H Figures 3 and 4 are perspective views
of grooves for the reception of buttons with rounded and V shaped peripheries
respectively and Figure 5 shows a modified arrangement in which the button F is
partly surrounded by a band I.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
The improved construction of joint for swing looking glasses and like frames in
which the tapered or inclined sides of the groove form the biting surfaces to the
button when put in contact as and for the purpose described.