Improvements in Printers' Quoins.
Year: 1891

page_text: Date of Application, 14th Feb., 1891-Accepted, 4th Apr., 1891
COMPLETE SPECIFICATION.
[Communicated from abroad by HENRY ADOLPH HEMPEL, of Gotha, in the
County of Orange and State of Florida, and JOSEPH ANTHONY DINGEUS,
of Buffalo, County of Erie, State of New York, both in the United States of
America.]
Improvements in Printers' Quoins.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, 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 :-
This invention relates to that class of metallic quoins which are used in pairs and
provided with gear racks on opposite sides of a central rib so that two of these
quoins can be placed in face to face contact with each other and can be tightened
or released by means of a pinion key inserted between two opposing gear racks
of the quoins. These quoins are extensively used, nevertheless printers are,
occasionally found who view all metallic quoins with suspicion because the frictional
resistance between the inclined faces of the quoins is less than in wooden quoins.
If the quoins slip on their inclined faces, the form becomes loose and damage may
result; and the object of this invention is to reduce the liability of the quoins to
slip on their inclined faces.
In the accompanying drawings
:-
Figure 1 represents a chase containing a form locked up with these improved
quoins.
Figures 2 and 3 are face views of a pair of the quoins.
Figure 4 is a side elevation of a pair of these quoins.
Figure 5 is an end elevation of one of these quoins.
Figure 6 is an end elevation of two of the quoins.
Figure 7 is a perspective view of one of the quoins.
Figure 8 is a side elevation of a pair of quoins containing the present improve-
ment, but constructed to be locked by means of a shooting stick and mallet instead
of a pinion key.
Figure 9 is a perspective view of one of the quoins.
Like letters of reference refer to like parts in the several figures.
A represents the chase, B the form, Ĉ the straight furniture placed next to the
form and D the quoins.
Each quoin is provided on its face or inclined' side with an inclined central rib
or feather d. Each quoin has at tlie butt or large end two lugs E arranged on
opposite sides of the central rib and projecting beyond the same so that a groove
is formed between the lugs in line with the rib. These lugs have inclined faces e e
and are provided on their inner or opposing sides, within said groove, with teeth or
projections f'extending from the inclined faces of the liigs toward the bottom of
the groove.
Each quoin is provided at its tip end with inclined faces g arranged
on opposite sides of the central rib and depressed below the same sufficiently to
form bearings for the inclined faces of the lugs of the opposing quoin. The ribs
of the two quoins need not come in contact with each other but are preferably
slightly separated, as represented in Figure 4, to avoid the necessity of finishing
their faces to form a close fit.
When so constructed, each quoin bears with the inclined faces of its lugs against
the inclined faces of the other quoin, whereby the wedging action is produced in
driving the quoins and the quoins of a pair are prevented from twisting on each
other to an undue extent by the central rib of one quoin entering the groove
between the lugs of the other quoin.

page_text: This rib has, however, a limited lateral play in the groove and is provided on its
sides with corrugations or teeth which correspond with the teeth on the inner sides
of the lugs so that by a slight twist of one quoin on the other which is permitted by
the play of the rib in the groove, the corrugations or teeth on one side of the rib
of one quoin will interlock with the teeth on one of the lugs of the other quoin
and thereby offer additional resistance to the slipping of the quoins on their inclined
faces.
The quoins represented in Figures 1 to 7, are provided with gear racks hon
opposite sides of the central rib between the inclined faces and the lugs, so that
a pinion key can be inserted between the opposing gear racks of two quoins and
the latter be tightened or released by turning the key.
In the quoins represented in Figures 8 and 9, the gear racks are omitted and
the inclined face is continued on each side of the central rib nearly to the lug,
from which the inclined face is separated by a deep recess i of such size that a
shooting stick can be inserted into the same for driving the quoin. It is obvious
that these recesses may be omitted and that the quoins can be driven by placing the
shooting stick against either end of the quoin.
The slight lateral or twisting movement of one quoin on the other, which is
necessary to interlock the corrugated rib of one quoin with the tooth of the other
quoin is produced by the pressure of the pinion key, or the shooting stick which is
applied more or less out of the central line of the quoin.
One or more ribs or teeth may be formed in the groove on the inner side of each
lug. In Figure 7, each lug is provided with a single tooth, and in Figure 9, with
two teeth.
By arranging the same inclined faces and locking devices on each side of the
central rib, each quoin can be used with either side up, which enables the quoin
nearest the form to be pointed toward the bar of the chase against which the form
rests whereby the type are tightened in locking the form.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, as communicated to me by
my foreign correspondents, I declare that what I claim is :-
First. A pair of quoins having inclined contact faces, one of said quoins being
provided with a corrugated or toothed side, and the other with a fixed tooth
adapted to engage with the toothed side of the opposing quoin by a slight lateral
movement of one quoin on the other, substantially as set forth.
Second. A quoin having a longitudinal rib provided with corrugated or toothed
sides, inclined faces on opposite sides of said rib, and lugs at the butt end arranged
on opposite sides of the rib and provided on their inner sides with teeth, sub-
stantially as set forth.
Dated thin besh
ד *
11001
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.