New and Useful Improvements in Printers' Quoins.
Year: 1893

page_text: Date of Application, 20th June, 1893-Accepted, 29th July, 1893
COMPLETE SPECIFICATION.
New and Useful Improvements in Printers' Quoins.
We, ROBERT WARG, of the City of Milwaukee, in the County of Milwaukee, in
the State of Wisconsin, United States of America, Mechanical Draftsman, and
AUGUST LINDEMANN, of the same place, Manufacturer, 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 new and useful improvements in "Printers' Quoins,"
and will be fully described hereinafter.
In the drawings:
Figure 1 is a broken plan view of one form of our improved quoin.
Figure 2 is an inverted view of the same.
Figure 3 is a transverse sectional view of the same, taken on line 3-3, of Figure 1.
Figure 4 is an end view.
Figure 5 is a plan view of our improved quoin, illustrating it in its closed
position.
Figure 6 is a broken plan view of another form of our improved quoin.
Figure 7 is an inverted view of the same showing it in its closed position.
Referring by letter to said drawings, A and B represent respectively, two sections
of a quoin, which are conveniently made of generally shape in cross section, and
are arranged to have a sliding engagement with each other.
One of the sections, as A, is provided in its opposite ends with slots a a, and the
ends of the other section B are provided with correspondingly shaped tongues or
ribs bb, arranged to enter and slide in said slots, so as to keep the two sections of
the quoin in alignment with each other.
A suitable cam or eccentric is provided for spreading the two sections A and B
apart, as will be presently described.
In the first five figures of the drawings, a cam C, is shown as journalled in one
section, as B, and arranged to engage with a bearing shoulder D upon the other
section, and it follows from this construction, that by a rotary movement of the
said cam, the two sections may be crowded away from each other, or permitted to
be pressed together according to the direction of rotation of the said cam.
The bearing face of the said cam is preferably roughened or corrugated as
illustrated at c, to prevent accidental slipping of the cam when it is in operation to
hold the sections of the quoin in their expanded positions.
As a further precaution against slipping, the section B of the quoin, in which the
cam is journalled, may be slotted adjacent to the bearing e for the axis E of said
cam, these slots e¹, e and e³, being conveniently arranged radially, with respect to
said bearing as best illustrated in Figure 2 of the drawings.
By this construction, a slight degree of elasticity is afforded to the section B of
the quoin, and the bearing face of this section is made of substantially the form
illustrated in the drawings, with its central part curved inwardly as shown at b, so
that the bearings of said section will be brought well toward the ends of the quoin.
It follows from this construction, that when the two sections A and B of the
quoin are spread apart by the rotary movement of the cam, and the outer or
bearing surfaces of said sections are brought into forcible engagement with the
form, the pressure of the cam upon the section B will cause said section to spring
slightly, so as to cause the slotted bearing for the axis of the cam to pinch or bind
upon the outside of the said axis, and thus securely hold the cam from rotation.
Under most circumstances, the operation of the cam will be sufficient to securely
hold the sections of the quoin in their expanded positions without the necessity
of slotting the bearing for the axis of said cam, from the fact that said cam has

page_text: a dead thrust against the bearing shoulder D, so that there will be little or no
liability of accidental loosening of the quoin when in operative engagement with
the form.
In the upper side of the cam, is provided a suitable angular socket c¹, for the
reception of an angular key or tool for adjusting the cam to a desired position.
In the form of construction illustrated in Figures 6 and 7, of the drawings, an
eccentric F is employed instead of the cam before described and this eccentric is
journalled upon a pin f revolubly engaged with a suitable bearing in the section B
of the quoin, and is arranged to rotate within an elongated opening or slot G in the
section A of the quoin, and is adapted by its rotation to adjust the two sections of
the quoin toward or away from each other in an obvious manner.
In this form of construction, as in the form first described, the section B of the
quoin, is provided with the radial slots e¹, e³, e adjacent to the bearing e for the pin
or trunnion of the eccentric F, and the operation of these slots to permit of a
slight spring of the section B so as to cause the same to bind upon the pin or
trunnion is the same as before described with reference to the other form of
construction.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is
1. A printers quoin, comprising two sections, one of which is slotted at its ends,
and the other provided with tongues or ribs adapted for engagement with the slots
in the ends of the first mentioned section, and suitable means for spreading said
sections apart, substantially as described.
2. A printers quoin, comprising two sections, movably engaged with each other,
a suitable cam journalled in one section and adapted for operative engagement with
the other section to force the two sections apart, and suitable guides for maintaining
said sections in alignment with each other, substantially as described.
3. A printers quoin, comprising two sections movably engaged with each other,
and a suitable cam journalled in one section and adapted for operative engagement
with the other section, substantially as described.
4. A printers quoin, comprising two sections movably engaged with each other,
a suitable cam or eccentric revolubly journalled in one section and adapted for
operative engagement with the other section, and one or more radial slots in the
first mentioned section adjacent to the bearing of said cam or eccentric, substantially
as described.
5. A printers quoin, comprising two sections movably engaged with each other,
a suitable cam or eccentric revolubly journalled in one section and adapted for
operative engagement with the other section to force said sections apart, suitable
slots arranged in the first mentioned section adjacent to the bearing for said cam or
eccentric, one of said sections being provided at opposite ends with suitable slots or
grooves and the other section being provided with suitable tongues or ribs adapted
for engagement with said slots or grooves, substantially as described.
6. A printers quoin, comprising two sections movably engaged with each other,
a suitable cam or eccentric journalled in one section and adapted for operative
engagement with the other section, the section in which the said cam or eccentric
is journaled being provided adjacent to said journal bearing with one or more radial
slots, and having suitable projecting bearing points upon its outer face adjacent
to its opposite ends, substantially as described.
301
E. P. ALEXANDER & SON, Fels. Chartd. Inst. P.A.,
19, Southampton Buildings, London, W.C., Agents.