DEVICES FOR SECURING FORMS ON BEDS OF PRINTING PRESSES
Year: 1879

page_text: LETTERS PATENT to John D. Lucas, of Baltimore, Maryland, United States of
America, Printer, for the Invention of "DEVICES FOR SECURING FORMS ON
BEDS OF PRINTING PRESSES."
Sealed the 20th January 1880, and dated the 23rd July 1879..
PROVISIONAL SPECIFICATION left by the said John D. Lucas at the Office
t of the Commissioners of Patents on the 23rd July 1879.
JOHN D. LUCAS, of Baltimore, Maryland, United States of America, Printer.
"DEVICES FOR SECURING FORMS ON BEDS OF PRINTING PRESSES."
My Invention is designed to furnish a device applicable to the beds of printing
presses as usually made and designed to obviate what has heretofore been the
source of much annoyance and loss of time. The primitive furniture, consisting of
strips of wood varying in thickness and somewhat tapering in order to wedge up
the chase, is still generally, indeed almost universally, in use. These strips of wood
are liable to buckle up and come in contact with the inking rollers, or even to fall
entirely out of place, besides requiring considerable time and patience to properly,
secure and lock up the chase.
On the accompanying Drawing is illustrated a printing press bed having a chase
locked up therein by means of the devices the subject of my Invention, A indicating
the bed, having the usual side bars a, a, and end strips a¹, a¹; B is the chase of the
usual form; C, C, are the ratchet bars, which are preferably made of the same length
as the bed inside the end strips a', a', although that is not essential.
They are so laid that the teeth C, C, incline towards the end of the bed opposite
the chase.
D is a bar, having its ends beveled to fit the teeth c, c, as shown, and having a
series of screws d, d, passing through it. To lock up the chase the same is laid
upon the bed A in contact with one of the end strips a¹.
The screws d being retracted the bar D is made to engage with the teeth c, c,
that are opposite the ends of the chase, which is then securely locked up by means
of the screws d. It will be seen that as the screws & come to bear on the chase the
ratchet bars are driven laterally against the side bars a, securely retaining the
device upon the press bed. As above stated the bars C are by preference made to
fit lengthwise upon the bed, but the lateral thrust will secure them in place even if
not in contact with the ends a¹, a¹. The screws d, d, are provided with either
perforated or polygonal heads for the attachment of a lever or spanner.
The device is simple in construction and may be applied to presses already in use,
and leaves nothing to be desired in point of efficiency in operation.
:

page_text: January 1880.
JOHN D. LUCAS, of Baltimore, Maryland, United States of America, Printer.
"DEVICES FOR SECURING FORMS ON BEDS OF PRINTING PRESSES."
My Invention is designed to furnish a device applicable to the beds of printing
presses as usually made, and designed to obviate what has heretofore been the
source of much annoyance and loss of time. The primitive furniture, consisting
of strips of wood varying in thickness and somewhat tapering in order to wedge
up the chase, is still generally, indeed almost universally, in use. These strips of
'wood are liable to buckle up and come in contact with the inking rollers, or even
to fall entirely out of place, besides requiring considerable time and patience to
properly secure and to lock up the chase."
On the accompanying Drawing A indicates the bed, having the usual side bars
a, a, and end strips a', a'; B is the chase, of the usual form; C, C, are the ratchet
bars, which are preferably made of the same length as the bed inside the end strips
a', a¹, although that is not essential. They are so laid that the teeth c, c, incline
towards the end of the bed opposite the chase.
D is a bar, having its ends beveled to fit the teeth c, c, as shown, and having a
series of screws d, d, passing through it.
To lock up the chase the same is laid upon the bed A in contact with one of the
end strips a¹.
The screws & being retracted the bar D is made to engage with the teeth c, c,
that are opposite the ends of the chase, which is then securely locked up by means
of the screws d.
It will be seen that as the screws & come to bear on the chase the ratchet bars
are driven laterally against the side bars a, securely retaining the device upon
the press bed.
As above stated the bars C are by preference made to fit lengthwise upon the
bed, but the lateral thrust will secure them in place even if not in contact with the
ends a¹, a¹.
The screws d, d, are provided with either perforated or polygonal heads for the
attachment of a lever or spanner.
The device is simple in construction, may be applied to presses already in use,
and leaves nothing to be desired in point of efficiency in operation.
Having now described and ascertained the nature of my said Invention and in
what manner the same is or may be performed,
What I claim as of my Invention and as secured to me by the hereinbefore in
part recited Letters Patent is,—
Firstly. A lockup for printers' chases, consisting of a bar provided with screws
or their equivalents for wedging the chase against the end flange of the press bed; the
said bar being incidentally clamped with reference to the sides of the bed, as set forth.
Secondly. The lock up herein described, consisting of the ratchet bars C, cross
bar D, and screws &, substantially as set forth.
In witness whereof, I, the said John D. Lucas, have hereunto set my hand and
seal, this Twenty ninth day of December, in the year of our Lord One
thousand eight hundred and seventy nine.
Witness,
R. D. WILLIAMS,
Patent Agent,
Baltimore, U.S.
JOHN DEAVER LUCAS. (L.S.)