Year: 1887

page_text: Date of Application, 20th June, 188
Complete Left, 19th Mar., 1888
Complete Accepted, 27th Apr., 1888
I SAMUEL BASTOW of the firm of Messieurs S. Bastow and Son of New Dock Saw
Mills, Chadwick Street, Leeds in the county of York, Timber Merchant do hereby
declare the nature of this Invention to be as follows:-
The object of my invention is to construct a cramp, to cramp together the timber
of doors, and the like, the cramp being arranged so that all the cramps can be
operated at once, or any one cramp can be operated separately, without interfering
with the other cramps. On a cast iron frame or an ordinary bench or frame, suitably
fitted and strengthened with planed angle iron pieces, I fix suitable adjustable brackets
for carrying the ends of a series of threaded or screwed rods carrying the side cramps,
the rods being of any suitable number as required. The cramps for the ends are
carried on a central rod having bevel wheels, gearing with and driving the bevel
wheels on each cross shaft, carrying the side cramps; to gain power by the operator
a second shaft is placed alongside the central shaft, carrying a large pinion wheel at
one end and a smaller pinion at its other, gearing again into a larger pinion wheel on
the central shaft. The driving pinion on the central shaft is placed upon the handle,
which is loose upon the shaft, so that by turning the handle on the central shaft, one
way or the other, the whole of the cramps are expanded or contracted; the bevel
wheels on the central shaft are loose upon key ways, so that they may be moved
bodily along to any required position, the adjustable brackets at the sides moving at
the same time. To enable each cramp to be worked separately and independently
when required, the cramps are each mounted on a nut, having an annular recess in
which fits a pin, the boss is tapped on to the shaft and is made fast or loose in the
cramp claw when required, by a spring key in a suitable key way, so arranged that
by depressing the spring key and putting on it a cap to hold it, the nut is loose
npon its screwed shaft, and can be tightened or slackened with a screw key as
required, but on taking off the cap the spring is released and secures the nut to

page_text: the cramp claw, by this means, any one cramp can be separately adjusted by
hand.
A circular, oval, or other suitable bearing may carry the whole of the shafts
where they are driven from the central shaft, and takes the tension of the cramp
claws.
I SAMUEL BASTOW, of the firm of Messieurs S. Bastow and Son, of New Dock Saw
Mills, Chadwick Street, Leeds, in the county of York, Timber Merchant, 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 :-
The object of my invention is to construct a cramp to cramp together the timber of
doors and the like, such cramp being arranged so that all the cramps can be operated
at once, or any one cramp can be operated separately, without interfering with the
other cramps.
On a cast iron frame or bed, I fix suitable adjustable brackets or arms having
pedestals at their extremities for carrying the ends of a series of threaded or screwed
shafts or rods upon which the circular claws or cramps are placed, the shafts or rods
being of any suitable number as required.
The cramp or circular claw for the end is carried on a central shaft or rod having
mitre wheel gearing with and driving the mitre wheels on each cross shaft carrying
the side cramps.
To gain power by the operator I place preferably a large spur wheel on the central
shaft, and a small pinion wheel carrying a square for the handle upon a stud gearing
into the larger wheel. When the driving pinion working into the spur wheel on the
central shaft is revolved by the handle (carried on the loose stud) it operates the
central shaft one way or the other, and the whole of the cramps are expanded or
contracted as desired.

page_text: The mitre wheels on the central shaft are loose upon a long key way, which enables
them to be moved bodily along to any required position; the adjustable brackets or
arms at the sides moving bodily at the same time.
The side cramps or claws are of a circular form, and are carried by the screwed
side rods, upon which they are tapped, these in turn being supported by the cast iron arms
or brackets. Upon each adjustable bracket is a planed raised rib running parallel to
the screwed rods, the periphery of the claws clear the raised rib but spring bolts or
slides are provided for each claw, so that when placed in position they engage with
the raised rib and so prevent the cramp from revolving; thus it tightens up or
slackens as desired.
There is a loose washer upon the face of the circular claws which takes the thrust
of the door, when being tightened up, this washer is kept in position by a pin working
in an annular recess on the inside of same.
One of the end adjustable arms carries an adjustable stop in lieu of an end cramp.
The bottom rail of the door rests upon this adjustable stop which takes the thrust
from the end claw on the central shaft.
When any one claw requires to be separately tightened or slackened without
disturbing the other claws, their spring bolts or slides are withdrawn to clear the
raised rib of the arm, and the claw is then turned one way or the other upon the
thread of its shaft by means of a loose handle which fits into holes on the periphery of
the claws.
The tension of the cramp claws is taken by the arm casting which slides on the
Fig. 1, is a plan of my improved cramp.
Fig. 2, is an enlarged end view of circular claw shewing spring bolt and raised rib
of adjustable bracket or arm.
Fig. 3, is a section of Fig. 2.
A is the cast iron frame or bed, upon which I fix suitable adjustable brackets or
arms B having pedestals C for carrying the ends of a series of threaded or screwed
rods D carrying the side claws or circular cramps E, the rods and adjustable brackets
being of any suitable number as required.
The cramp or claw E' for the end is carried on a central shaft or rod F having
mitre wheels H, H, H, gearing with and driving the mitre wheels J on each cross
shaft D carrying the side cramps E.
To gain power by the operator I place preferably a large spur wheel K on the
central shaft or rod F, and a small pinion wheel L carrying a square M for the
handle N upon a stud P gearing into the larger wheel K.
When the driving pinion L is revolved by the handle N (carried loose on the stud P)
it operates the central shaft F one way or the other and the whole of the cramps E
and E are expanded or contracted.
The mitre wheels H on the central shaft F are loose upon their key way R, so that
they may be moved bodily along to any required position, the adjustable brackets or
arms at the sides moving bodily at the same time.
The side cramps or claws E are of a circular form and are carried by the screwed
side rods D, upon which they are tapped, and which are in turn supported by the
brackets or arins B. Upon each of the adjustable brackets or arms B is a planed
raised rib S running parallel to the screwed rods, the periphery of the claws clear the
raised rib but spring bolts or slides T are provided at four points on each claw so that
when placed in position any one of them will engage with the raised rib S and
so prevent the cramp or claw from revolving, so that it tightens up or slackens as
desired.
There is a loose washer U upon the face of the circular claw which takes the thrust
of the door when tightened up, this washer is kept in position by a pin V working in
an annular recess on the inside of same.

page_text: One of the end adjustable arms carries an adjustable stop W in lieu of an end cramp.
The bottom rail of the door rests upon this adjustable stop which takes the thrust from
the end claw on the central shaft.
When any one claw requires to be separately tightened or slackened without
disturbing the other claws, their spring bolts or slides are withdrawn to clear the
raised ribs of the arms, and the claw is turned one way or the other (by means of a
loose handle X which fits into holes Y on the periphery of the claws) upon the
thread of its shaft according as it is required to tighten or slacken the particular
claw.
A circular, oval or other suitable bearing upon the arms may carry the whole of the
shafts where they are driven from the central shaft, and take the tension of the cramp
claws.
This system may also be used with advantage in cramping sashes.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed 1 declare that what I
claim is :-
:-
1. An improved door cramp by which the whole of the cramps or claws can be
tightened up or slackened at once or any one cramp or claw can be tightened or
slackened independently for the purposes shown and described.
2. The construction of claws so that they may be either fast or loose upon their
hafta fan the
JOHN E. WALSH,
Royal Exchange Chambers,
Boar Lane, Leeds,
Agent for the Applicant.
JOHN E. WALSH,
Royal Exchange Chambers,
Boar Lane, Leeds,
Agent for the Applicant.