Improvements in Apparatus for Applying the Tension or Twist to Semi-divided Nuts.
Year: 1892

page_text: Date of Application 14th June, 1392
Complete Specification Left, 14th Mar., 1893-Accepted, 6th May, 1893
IRUVIDIONAL DIFICATION.
Improvements in Apparatus for Applying the Tension or Twist to
Semi-divided Nuts.
I, JOHN READ PEACOCK, of Radford Boulevard, Nottingham, in the County of
Nottingham, Pattern Maker, do hereby declare the nature of my invention to be as
follows:-
This invention is for a machine or apparatus for giving the twist, or applying the
tension as it is technically termed to semi-divided nuts for bolts or the like.
The nut to be operated upon split or semi-divided horizontally from one side
through the centre hole or considerably past the centre so that I use the word
"semi-divided" in a broad sense, and the operation is to permanently move each
part, of the nut in opposite directions upon its horizontal plane, so that the screw
threads of the upper and lower parts will be slightly out of truth.
I propose to make a machine that may be worked by hand or other power, having
two pairs of jaws, one pair to seize the lower part of the nut under operation and
another pair to seize the upper part of the nut.
The working parts of the apparatus may be carried upon a table, supported by
a frame or legs, and upon the centre of the table I fix the lower pair of jaws, the
back jaw being fixed, and the front jaw fixed in slides so that it can be moved to
and from the back jaw.
Each pair of jaws are suitably constructed to hold the nut firmly and centrally.
The front or sliding jaw of the lower pair is opened by the action of a spring, and
is closed upon the nut by means of a cam or eccentric operated by a hand lever.
The nut is supported by a ledge in the jaws, but when they are opened the nut falls
through and is conducted into a receiver.
Upon the table above the lower dies, is a plate carrying the upper pair of dies
which open in the opposite direction to the lower pair, and are operated by means
of a right and left hand screw. This plate has a short rotary movement upon
segmental slides on each end of the table, the centre of the dies being their
common centre, and the amount of such motion can be regulated by any suitable
device.
The circular or rotary movement of the top plate and dies is imparted either by
a hand lever, or by a worm and segmental rack, or equivalent device if worked by
hand power, or by a driving and reversing gear, or steam or hydraulic cylinder or
other motive power if not by hand, and it may have such opening, closing and
twisting motions automatically performed if desirable.
Dated the 12th dor of Inno 1009
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Applying the Tension or Twist to
Semi-divided Nuts.
1, JOHN READ PEACOCK of Radford Boulevard, Nottingham in the County of
Nottingham, Pattern Maker, 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 is for the construction of a machine or apparatus for giving a
lateral twist of the two parts of semi-divided nuts for bolts, technically termed
"the tension."

page_text: The nuts alluded to are split or divided horizontally from one side, through the
centre hole, and approaching the other side, so that the word semi-divided is used
in a broad sense, and the twisting operation is to move each part so divided, laterally
or in opposite directions in its horizontal plane, or moving one side or part only will
produce the same result, that is the upper part of the bolt hole will be out of truth
with the lower part.
The machine is illustrated in the annexed sheets of drawings, in which like letters
of reference indicate like parts in any of the several figures.
Fig. 1, is a front elevation of the machine.
Fig. 2, plan of same, omitting the base.
Fig. 3, side elevation of same.
Fig. 4, plan of lower plate and jaws.
The machine illustrated in the drawings is constructed to be worked by hand, but
it may be arranged to be worked by steam or other power if so desired.
It consists briefly of two sets of adjustable jaws, one set above the other, so
arranged that one set will seize the lower part of the nut, and the other set will seize
the upper part of the nut, also there is mechanism to produce a twisting action.
A, is a standard of any desired form, the one shown being suitable for the
purpose; the top is constructed as a table, upon which I fix a
plate B, shown
separately in Fig. 4, which carries the lower pair of jaws J, the back jaw being
stationary, and the front jaw held in slides so that it can be moved horizontally
towards the back jaw by a sliding piece C, operated by a cam or eccentric roller D,
turned by a lever E.
When the pressure of the cam or roller D, is removed, the plate or sliding piece C,
is drawn back by the action of a spring F, opening the jaws. The nut is supported
in the jaws by a narrow ledge, but when the jaws are opened the nut will fall
through into a receiver.
The plate or slide C, has preferably a face of steel C', where it bears against the
cam D.
Above the plate B, I fix a plate G, which is also provided with a pair of jaws J',
which open in the opposite direction to those below, and which are opened and
closed by means of a right and left-hand screw H, working in corresponding nuts
secured to the jaws by the screws I. The screw H, is turned by the hand
wheel K.
This upper plate G, has a short rotating movement upon the segmental ends B', of
the plate B, which are machined for the purpose, the centre of the jaws J, and J',
being the common centre from which the segments are struck, and the screw H, is
carried by depending bearings L, at each end of the plate G, or otherwise.
The circular or rotary movement which gives the twist to the nut as before
described, may be readily given to the plate Ğ, by the means shown, consisting of a
worm M, upon the shaft N, supported by the brackets P, and turned by a
hand wheel Q, the threads of the worm wheel engaging with a segmental rack R,
indicated by dotted lines in Fig. 2.
An adjustable stop for regulating the amount of travel of the plate G, may be
used if desired, or instead of a rack and worm, I may use an ordinary reversing gear,
or a steam or hydraulic cylinder may be employed to turn the table or plate G.
Having now particularly described and ascertained the nature of my inven-
tion, and in what manuer the same may be carried into practice, I declare that
what I claim is :-
1 The machine for twisting semi-divided nuts constructed substantially as
hereinbefore described and illustrated in the drawings.
2-In a machine for twisting semi-divided nuts, a pair of gripping jaws arranged
to grip the lower part of the nut, in combination with a superposed pair of jaws to
grip the upper part of the nut, and having a rotary movement by which the upper
part of the nut is moved in a lateral direction or twisted, substantially as herein-
before described.

page_text: 3-In a machine for twisting semi-divided nuts, the combination of two pairs of
gripping jaws arranged to seize the upper and lower parts of the nut, and to move
either one or both parts laterally so as to put the bolt hole out of truth substantially
as described.
Dated the 10th day of March 1893.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.