Improvements in Apparatus for Securing Together Scaffold Poles.
Year: 1890

page_text: Date of Application, 11th July, 1890-Accepted, 20th Sept., 1890
COMPLETE SPECIFICATION.
Improvements in Apparatus for Securing Together Scaffold Poles.
I, JAMES COLIN MONTGOMERIE of Oak Lodge, Bitterne, near Southampton, in the
County of Hants, Gentleman, 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 designed to supersede the method now usually adopted and which
consists in lashing the poles together with ropes or cords. In substitution for the cords
I use a chain and the invention relates to the means employed for securing or
connecting together the-ends of the chain. The invention will be best understood
by reference to the accompanying drawing which represents an elevation of the
apparatus and chain.
A represents the chain which may be of any convenient length and is connected at
one end by a shackle or loop B or otherwise with a sleeve C through a hole C¹ in a
wing or lug D of which sleeve the loop B, or if preferred the link of the chain, passes,
and may then be secured by welding its ends in the usual manner.
The sleeve C is
free to slide and turn upon the shank E of the hook F. The hook F when in use is
intended to engage with any required link of the chain A so as to adapt the length
of the chain to the requirements of the case. The shank E is screwed preferably with
a quick pitch as for example by employing a double thread and the screwed portion
carries a nut G which as it does not require to be removed when once placed
on may be secured by rivetting over the end of the screwed shank E as at H. I
is a washer which may be introduced between the nut G and the sleeve C.
This apparatus is used as follows:-
The chain is passed round the scaffold poles in any convenient manner and at any
angle according to the positions of the poles, the hook F is then inserted in the proper
link of the chain the nut G to commence with being preferably at or near the end H
of the shunk E. The nut is now screwed up against the sleeve Cthus reducing the
distance between the sleeve and the hook F with the necessary result of reducing the
available length of chain and thus tightening the whole up. To undo the fastening
it is merely necessary to slack back the nut G when the hook F can be disengaged
from the chain and the whole removed.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a chain fastening for scaffold poles and the like the combination with the
chain A which holds the poles together of a screw hook E F chain carrying sleeve
such as CD and nut G substantially as described and illustrated in the accompanying
drawing.
2. In a chain fastening for scaffold poles and the like the combination with a screw
hook and nut such as E F and G of a chain carrying sleeve such as CD substantially
as described and illustrated in the accompanying drawing.
Dated this Tenth day of July 1890.|
JAS. C. MONTGOMERIE.
W. P. Thompson & Boult,
Agents for the Applicant.