Improved Means for Securing Scaffolding Poles together.
Year: 1897

page_text: Date of Application, 30th Nov., 1897
Complete Specification Left, 27th Aug., 1898-Accepted, 29th Oct., 1898
PROVISIONAL SPECIFICATION.
Improved Means for Securing Scaffolding Poles together.
WALTER HUNNABLE, Mount Road, Braintree, Essex, Builder, ARTHUR
HUNNABLE, Bungalow, George Street, Romford, Essex, Engineer, do hereby declare
the nature of this invention to be as follows:-
Our invention consists in means for fixing scaffold poles togeather one method
we make a semicircle with two arms. At the ends of each arm we form a boss
the said bosses are to take a set screw which screw into the pole formed as a
runner when two arms are used in case of the necessity for two poles to be carried
by one clamp. The two ends would meet in the centre & one screw would enter
one pole the other screw enter the second. We attach to this semi circle another
semi circle at the opposite angle the second one is to grip onto the upright pole.
Just above this second semi circle we form two bosses. We make a hook & eve
to work on the said bosses we attach to one hook a semi circle band which has
got a eye or hole at each end after attaching the band to one hook the band
will swing round the pole & can then be booked on to the hook on the other side
boss. The weight of the runner arms cause the second mentioned semi circle to
grip on the pole & pull against the band the more weight there is put on, the
tighter the clamp grips the pole we also make a threaded screw to attach one
end of the band & when brought round the pole the threaded screw or bolt is
passed through or into a boss & a nut put on thus it can be screwed to any
required tention we may replace the band by one or more chains, we may also
attach the same method to the runner semi circle instead of the screws mentioned.
We also make some clamps or holdfasts with the semi circle set at different or
any other angle & attach the aforesaid method for gripping. In case of using a
more simple form namely two semi cirele bands bolted or strapped togeather we
make a casting with semi circle hollow grooves at the required angle the poles are
wanted to be in relation to each other thus each pole is placed in a hollow before
being strapped together.
Navamha 1907
COMPLETE SPECIFICATION.
Improved Means for Securing Scaffolding Poles together.
We, WALTER HUNNABLE and ARTHUR HUNNABLE, of 15, Wellesley Road,
ford, late of Mount Road, Braintree, in the County of Essex, Builder and
[Price 8d.]

page_text: Engineer, respectively, 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:-
Our invention relates to improvements in means for fixing together the poles
used in the erection of scaffolding for building and other purposes, and has for its
object, to dispense with the tedious and uncertain method of securing these
together by ropes and wedges as hitherto,
Our invention consists of variously formed metal clamps, one portion of which
is adapted to receive and hold the end or ends or other part or parts of such poles
when used in a horizontal position as runners, while the other portion is adapted
to grip and hold any part of a pole when in a vertical position, or for connecting
angular or bracing poles to either or both, the two or more poles being thus
firmly connected in less than one twentieth of the time hitherto employed to attain
the same ends, the said clamps being so arranged that the weight of the hori-
zontal pole or poles assists in binding this or these to the vertical poles, as herein-
after explained.
In order that our said invention, the several methods of constructing and
arranging the same; and the manner of its use may be fully understood, reference
is hereinafter made to the accompany drawings, of which
Fig. 1 is a perspective view of one method of constructing our said improved
clamp, while Fig. 2 is a perspective view of an alternative method of constructing
the same.
Figs. 3 and 4 are views illustrating the two positions of Fig. 1 in the use and
application of the same, as hereinafter explained.
Fig. 5 is a view illustrating the application of Fig. 2.
According to the method of construction illustrated by Fig. 1, our invention
consists of a cast or wrought metal device or body A, the upper and outer portion
of which is formed to provide two arms B and B¹, the said arms, in combination
with the said body, forming a clamp of semi-circular formation, and of such
dimensions, as to receive any portion of any ordinary scaffold pole. The arms B
and B have formed at their extremities bosses such as C and C¹ respectively, tapped
internally to receive thumb screws D and D respectively, each of which sail
screws is finely tapered and pointed at their initial ends a. The lower end of
the body A is so formed as to provide a semi-circular opening E at right angles
with the semicircular frame formed by A and B and B. the said opening E being
partly formed by extensions F and F on A, while the outer and lower portion of A
(at the points facing the junctions of F with B. and F¹ with B) is provided with
extensions or knuckles G, and between these one or more spikes or pointed pro-
jections G.
At the extreme end of the extension F is swivelled or otherwise pivotally con-
mected a hook H, while the extension F has similarly connected thereto a hook H¹
The hook H is adapted to engage with the eye J at one end of a metallic piece K.
formed in the shape of a sector of a circle, and having upon its inner surface two or
more spikes or pointed projections G. the opposite end of K being pivotally connected
to a jointed band or chain L, which may be similar to that of a cycle chain, the
spaces between the links b of which are of such formation that the hook H¹ may
he easily caused to engage with either of them. The manner of operation is as
follows:
The semicircular space E would be first placed abutting against that part of
the vertical scaffold pole M to which it is desired the clamp should be attached, the
chain or band L being then placed around M, and the link nearest possible to the
piece caused to engage with the hook H¹, as suggested by Fig. 3. at which time
the bosses C and C of the arms B and B would be resting up against the pole M.
as shewn in the same figure but if the body be now brought down, until at
right angles or thereabouts with the pole M, the heels or knuckles G would abut
against the pole M and act as levers, by which any further downward pressure

page_text: brought to bear upon A would tend to still further tighten the chain or band L,
and thereby cause the spikes G¹ on A, and G on K to enter the substance of the
pole M and so prevent the possibility of down slip. The semi-circular space in A
formed by the arm B 13 is for the reception of a horizontal pole N, as at Fig. 4,
with which is now caused to engage the pointed ends of the screws D D when
tightened by hand or other suitable means, such, for instance as a spike engaging
with holes c in the heads of D and D¹. Or when necessary the body A and
arms BB may receive and hold the two largest or smallest ends of two scaffold
poles, abutting end to end against each other, and both resting upon A, so that
while the screw D) engages with and holds the one pole, the screw I may engage
with and hold the other, and the weight of such pole or poles by exercising a
downward pressure upon A would still further tighten the chain or band L, from
which it will be understood that the greater the weight imposed upon A, the
firmer would be the connection between N and M, by reason of the leverage
afforded by the knuckles G.
In the alternative arrangement shewn in Fig. 2, we provide in lieu of the semi-
circle E. two metallic pieces P and P, each in the form of a sector of a circle, and
hinged or otherwise pivotally connected together at a point to facilitate their
use, the free end of being provided with a hook R, adapted to engage between
the links b of the chain or band L. the said chain or band being connected at one
end to a hook S, provided with a screw T, adapted to pass through a hole in the
lug formed upon the free end of the member P, and thereat receive a nut or
nuts f. the tightening of which said nut or nuts after the chain or hand L has
been placed around the vertical pole M, and caused to engage with the hook R.
would tighten the said chain or band and cause the same, and the members P' P¹.
to close up around and firmly clasp the pole M as at Fig. 5, the spikes G2 on P
or or both if used (not shown) would as in the previous method engage with the
substance of M.
One of the members P or PI preferably P. has brazed, bolted or otherwise con-
nected thereto, or cast or otherwise formed integrally there with an approximately
semicircular member V, which in this device operates as an equivalent of the
arms B and B in the device Fig. 1, the said member having at its free end a
lug C provided with an internally threaded hole, which receives a threaded
screw D3, similar to those shewn in Fig. 1, the said member being for receiving
and holding a horizontal pole N, the tightening of 1 serving to cause its point a
to enter the substance of N. and retain the same in position, as shewn in Fig. 5.
As a further modification for use in holding together two vertical poles when
used for extending the height of a scaffold, we may dispense with the member V
and its accessories, and in lieu thereof provide an exact duplicate of P. P₁, K, L, S.
and Tf and braze, rivet, or otherwise connect the P member of the one with
the P member of the other, at or about the point at which V is connected to P
in Fig. 5, but at right angles to the position of V there shewn, or in other words
in the same plane as the members P and P₁, so that while the members P and P
and chain L of the one device, may grasp. and he fixed upon, the upper and smaller
end of one vertical pole, the members P P and chain L of the second device may
grasp and hold the lower and larger end of the second and upper vertical pole.
and so firmly hold the two vertical poles together.
It is obvious that the last described modification provides equal facilities for
connecting together the larger end of one, and the smaller of the other of two
poles placed horizontally, but to connect two such poles so joined together with
a vertical pole or poles one of the devices Figs. 1 or 2 must be employed in the
manner described."
We may find it convenient to so arrange the portion V in Fig. 2, or the
modification last described in which the duplicate of P, P¹, R. L, S, T, and ƒ is
employed in lieu of V. that instead of being in fixed connection with P, P', R, I.,
S. T and shewn in Fig. 2, the portion V, or the said duplication may be

page_text: swivelled thereon, so that the device may be employed for connecting poles together
at various angles for bracing purposes.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:
1st. The herein described device or apparatus, and the several alternative methods
of constructing and arranging the same, as a means for connecting and securing
together scaffold poles for building and other purposes, substantially as herein.
set forth and shewn.
2nd. In an improved device or apparatus for connecting and securing scaffold
poles together, the combination of a metallic body such as A. having spikes such
as Gand arms such as 13 and 13, provided with lugs C and C for receiving screws
such as D and D', the said body being recessed at E. and provided with extensions G
and F and F, the latter carrying hooks H and H respectively for receiving and
holding a chain or band having a solid portion K provided with spikes G2 and
a flexible portion such as L, the former for connection with H and the latter
with H', the whole connected, combined, and operating substantially as and for
the purposes herein described and shewn, by Figs. 1, 3 and 4 of the accompanying
drawings.
3rd. In an improved device or apparatus for connecting and securing scaffold
poles together, the combination of a pair of metallic members such as P and P
pivotally connected together at a point d the latter P being provided with a
hook R and the former P with a lug e for receiving a threaded hook S in adjust-
able connection with the said lug, the said hook S. having connected thereto one
end of a flexible band or chain such as L. adapted to be connected with the hook R.
the said member P baving connected thereto or formed integrally therewith a
third member such as V. provided with a lug C, carrying a serew D³, the whole
connected, combined and operating substantially as and for the purposes herein
set forth and shewn by Figs. 2 and 5 of the accompanying drawings.
4th. In an improved device or apparatus for connecting and securing scaffold
poles together, the combination of a duplication of the parts P, P, R, L, S, T
and shewn in Fig. 2 of the accompanying drawings, and connected and operating
in conjunction therewith substantially as herein described.
11: 011
1340
GEO. THOS. HYDE,
1, Broad Street. Buildings, Liverpool Street, London, EC.,
Agent for the Applicants.