IMPROVEMENTS IN APPARATUS FOR STRAIGHTENING: GUN BARRELS
Year: 1858

page_text: ԱՆԵՐՄԱ
application for Letters Patent was not given within the time prescribed'
by the Act.)
PROVISIONAL SPECIFICATION left by Thomas Golsworthy Pengelly and
Henry Brown at the Office of the Commissioners of Patents, with their;
Petition, on the 13th August 1858.
We, THOMAS GOLSWORTHY PENGELLY, Gun Maker, residing 5, Cheshunt
Terrace, Waltham Cross, Hertfordshire, and HENRY BROWN, Gun Maker,:
residing Old Road, Enfield Highway, Middlesex, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN APPARATUS FOR STRAIGHTENING:
GUN BARRELS," to be as follows:-
:
A machine consisting of a cast-iron bed, one foot eight inches long by one:
foot six inches wide, with sides six inches deep, circular front of one foot deep:
in the centre, the whole one inch thick; at the back of the bed is a flange or.
projection across the bed, at the further extremity of two inches and quarter.
square from the surface of the bed, thus forming the entire casting or bed..
On each of the flanges is placed a brackett rising nine inches from the surface;
of the bed with an arm extending one foot nine inches at right angles. from
outside of the bed; on these bracketts are placed two cross bars extending from:
one to the other in a line with the front surface of the flange, one four inches,
the other nine inches in height from the surface. of the bed; these cross bars are
divided into fifteen compartments to receive fifteen hammers or pieces of iron
eleven inches long, one inch wide, and three-eights of an inch thick, with a. :

page_text: projection from the bottom of two inches in height by one inch and quarter
thick; these hammers are so placed as to fall against the front surface of the
flange, and rise accordingly as necessity requires.
To obtain this a rack with fifteen wheels, one ratchett wheel with ten teetli,
and an hand wheel; this rack is placed across the centre of the bracketts, with
a cross bar at the end to receive fifteen levers; these levers are in a line with
the wheels of the rack, and are connected with the top of the hammers, so
that by cutting the wheels the hammers are allowed to fall and rise, and are
placed in ten different positions according to the number of teeth in the
ratchett weell, each hammer having an elastic spring to keep it down to its
place when allowed by the wheel on the rack to fall; on the front and centre
of the bed is placed a box and screw one inch and half in diameter by one
foot two inches long; at the end of the thread is placed a wheel of sixty teeth,
this wheel is outside and front of the casting; from this wheel the end of the
screw projects four inches, supported by a. stay.fastened to the sides of. the
casting; in the front of the casting is a hole to receive an arbor, on which is
placed a pinion with flanges on each side of twenty teeth, the same is con-
nected with the wheel of sixty teeth; on the screw of this arbor is placed a
hand wheel of two feet in diameter; this arbor is supported by a stay fastened
to the sides of the casting the same as the screw.
On the bed of the casting between the box and flange is placed an iron
slide, eight inches long by two inches thick, four inches wide at the bottom,
and two inches at the top; at one end there is a dovetail to receive a tool.
The machine is placed on swivels similar to a telescope, so as to rise and:
fall to take the shade of the inside of a gun barrell which is placed between
the slide and the hammers; the front of the hammers are hollowed to receive
the barrell, and an hill on the back to fall into an hollow in the flange; tools
are placed in the dovetail of the slide according as necessity requires. The
process of straightening the barrell is as follows:-The barrell is placed into the:
machine, the shade taken; if a short bend presents itself you turn the hand
wheel of the rack to number two ratchett wheel, the number two and number
three hammers right and left of the centre hamimer; number one falls in front)
of, the flange by turning the hand wheel of the pinion, the slide advances, and
springs the barrell between the hammers number two and number three; the eye.
being upon the shade you ascertain on the outside the exact centre of the bend
in the inside of the barrell. The slide is then advanced untill the bend, disappears,
when the pressure is off the barrell, for the longest bends, the rack is placed at
number eight, the two extreme hammers number fourteen and fifteen falls, the

page_text: others are on the rise above that flange, and the barrell is opperated upon the same
as before; should a ring present itself the rack is placed at number one ratchett
wheel, number one or centre hammer falls, the rest are on a rise, a different
tool is dropped into the dovetail of the slide, the exact spot of the ring is
ascertained as before, and worked accordingly. By our process we do not
deface or dent the outside of the barrell as in the ordinary way, or strike, bend,
or bruise the inside of the same by chance blows.