IMPROVEMENTS IN MOUNTING SWING FRAMES
Year: 1884

page_text: † WILLIAM TROBRIDGE of 177 Aston Road, Birmingham in the County of
Warwick Brass Founder do hereby declare the nature of my said Invention for
IMPROVEMENTS IN MOUNTING SWING FRAMES, to be as follows:-
The object of my invention is to provide an improved method of mounting
swing frames, applicable to swing looking glasses, picture frames, fanlights, and
analogous purposes.
In carrying out my invention, I fit upon each side of the swing framo, at or near
the centre of gravity thereof, a metal plate, in the centre of which is a square hole.
The frame is sustained by two horizontal rods or spindles which pass through or
into the side supports. The inner ends of these two spindles aro made square to
fit the square holes in the metal plates, and the spindles therefore swing or revolve
with the frame.
At each of the outer ends of the spindles I fit a spiral spring in a cylinder or
case, the extreme outer end of each spindle being fixed to a plate, which receivos
the thrust of one end of the spiral spring, and retains the same in position. The
outer end of the spiral spring impinges upon a plate fixed to the support which
sustains the spindle.
The effect of the foregoing arrangement is that when the frame is placed in any
position or at any angle, the friction arising between the springs, the boxes, and
the plates enclosed in the boxes, is sufficient to retain the frame in the position in
which it is placed; and to whatever position the same may be moved by hand the
frame has no tendency to change such position.
In applying my invention to fanlights and analogous articles I let the spring
boxes into suitable prepared holes, and place the ends of the boxes flush with the
supporting frames,
f
.
'

page_text: COMPLETE SPECIFICATION.
I WILLIAM TROBRIDGE of 177 Aston Road Birmingham in the County of
Warwick Brass Founder do hereby declare the nature of my Invention for
IMPROVEMENTS IN MOUNTING SWING FRAMES 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 my invention is to provide an improved method of mounting
swing frames, applicable to swing looking glasses, picture frames, fanlights, and
analogous purposes.
In carrying out my invention I fit upon each side of the swing frame, at or near
the centre of gravity thereof, a metal plate, in the centre of which is a dovetail
recess, The frame is sustained by two horizontal rods or spindles which pass
through or into the side supports-The inner ends of these two spindles are made
to fit the dovetail recess in the metal plates, and the spindles therefore swing or
revolve with the frame.
At each of the outer ends of the spindles I fit a spiral spring in a cylinder or
case, the extreme outer end of each spindle being fixed to the case by rivetting,
the inner side of the case receives the thrust of one end of the spiral spring, and
retains the same in position. The other end of the spiral spring impinges upon a
flange attached to the spindle.
The effect of the foregoing arrangement is that when the frame is placed in any
position or at any angle, the friction arising between the springs, the boxes, and
the plates enclosed in the boxes, is sufficient to retain the frame in the position in
which it is placed; and to whatever position the same may be moved by hand, the
frame has no tendency to change such position.
In applying my invention to fanlights and analogous articles, I let the spring
boxes into suitably prepared holes, and place the ends of the boxes flush with the
supporting frames, or the position may be reversed and the spring case may be
placed between the frame, and the support.
And in order that my said invention may be more particularly described and
ascertained, reference is hereby made to the accompanying drawings in which
similar letters of reference indicate corresponding parts.
Fig. 1 is a perspective view of the fittings-Fig 2 is a similar view of the case
with the spring removed. Fig 3 is a view partly in section of the fitting in
position, and Fig 4 shews another method of fitting the same.
In Fig 1, a is the plate which is fitted to the back of the swing frame, b is the
spindle, o is a case which is formed in one with the plate -The spindle 6 carries
& spiral spring d.
•
Fig 2 shews the method of procedure. The spindle b, with the spiral spring d
surrounding the same, is placed in the position shewn in Fig 1. The spring is
forcibly compressed in the case c, and the end of the spindle is then rivetted to
the case. The friction arising from the compression of the spring between the
internal end of the case a and the flange bl of the spindle b, is sufficient to hold
the swing frame in the position in which it is placed.

page_text: Instead of mounting the spindle b as shewn in the drawings, I sometimes form
such spindles with square ends, fitting into square hole plates attached to the
frame, as mentioned in my provisional specification.
Figs 3 and 4 shew two methods of fitting my invention. Fig 8 is similar to
that shewn above, in which the ease is mortised into the upright support or
standard; and Fig 4 shews the case placed between the standard and the frame
the principle being the same in both cases.
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
1. The method of mounting spindles for swing frames, in contact with spiral
springs enclosed in cases, substantially as and for the purpose hereinbefore
described and shewn on the drawings.
2. The general construction and arrangement of the several and respective parts,
together forming my improvements in mounting swing frames, substantially as
herein before described and shewn on the drawings.