Year: 1887

page_text: Date of Application, 15th Nov., 1887
Specification Accepted, 16th Dec., 1887
01 A
We FERDINAND LEWIS SCHEIDEMANN Watch Case Turner, of 3958 Girard Avenue
and FREDERICK WILLIAM BENDER, Wood Carver of 4048 Girard Avenue, Philadelphia
in the County of Philadelphia and State of Pennsylvania, United States of America
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 our invention is to provide for use particularly in fine cabinetwork, a
practical hinge which may be applied so as to be invisible from outside the joint formed
thereby when closed.
To this end the hinge leaves are connected together by crossed or scissor-like links
each link having one end pivoted to one hinge leaf and the other end adapted to travel
on a guide on the opposite leaf, the links being pivoted together on a median line
nearer their pivotal than their travelling ends, substantially in the manner hereinafter
described and for the purpose set forth.
Reference is to be had to the accompanying drawings forming a part of this
specification, in which figure is a face view of our improved hinge as applied to a
door and fully opened. Figure 2 is a cross section of the said hinge joint on the
line -x figure 1; figure 3 is a cross section of the same on the line y-y figure 1;
figure 4 is a cross section similar to that in figure 2, taken with the joint closed;
figure 5 is a like cross section taken with the joint partially opened.
Similar letters of reference indicate corresponding parts in all the figures.
In this example the hinge leaf A is formed at its inner edge with a pair of ears B
at the proper distance apart to receive between them the knuckle of a flat link D which
is pivoted to and between the ears B.
The other hinge leaf A¹ is formed near its outer edge with a pair of transverse
guides having inwardly turned flanges and forming channels in which travel
friction rollers F situated at opposite sides of the free end of the link D. The leaf A¹
is also formed on its inner edge near either end thereof with preferably two pairs of
ears B', to and between each pair of which is also pivoted a flat link D' having lateral
friction rollers F at its free end like the link D, which travel between pairs of transverse
guides C on the leaf A like those of the leaf A¹.

page_text: The rollers F of the links D and D₁ run in straight ways formed in their
respective guides and thereby serve to hold the free ends of the links to the respective
hinge leaves.
The links D D¹ have each formed at a point nearer their pivotal than their free end
a transverse eye, and these eyes E, E' of the several links being aligned, a single hinge
pin G is passed through all of them to pivot the several links D D together.
A mortice H is formed in the edge of each of the parts I to be hinged together to
receive the respective hinge leaf and attachments, said mortice terminating at a short
distance from the outside joint edge, so as to leave a rib J.
The hinge leaves A. A¹ being secured within the mortices in the usual way so as to
bring the hinge pin G over the centre line of the joint as shown in figures 2 and 3,
when the joint is closed as in figure 4, the links will fold like scissors, and the ribs J.
on the two parts I, will meet outside the several ears B, B¹ so as to entirely conceal the
hinge at that side.
When the joint is opened as in figure 5, the action of the scissor-like links is to
separate the two parts I, while allowing them to fold outward so that the crushing of
the edges J which would occur if the hinge pin directly connected the two parts I
on a line within the joint as in this case, is prevented.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is ;-
1st. The combination of hinge leaves each provided with guide ways and links
connected pivotally together and to either leaf, and the free ends of said links arranged
to run on the guide ways, substantially as described.
2nd. The combination of hinge leaves each formed with a pair of guide ways, links
pivoted together and to either leaf and arranged to travel between the guides on the
opposite leaf, and friction rollers pivoted to the sides of the free end of each link and
adapted to run within the guide ways, substantially as shown and described.
Dated this 15th day of November 1887.
F. L. SCHEIDEMANN.
F. W. BENDER.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.