An Improved Lever Spanner for Tubes of Tubular Boilers and like Purposes.
Year: 1899

page_text: Date of Application, 15th Dec., 1899
Complete Specification Left, 8th Sept., 1900-Accepted, 13th Oct., 1900
PROVISIONAL SPECIFICATION.
An Improved Lever Spanner for Tubes of Tubular Boilers and like
Purposes.
We, JOHN JAMES HOLMES, of 16, Halstow Road, East Greenwich, and ALBERT
DANIEL BYRNE, of 44, Bromehead Street, Commercial Road, Engineers, do hereby
declare the nature of this invention to be as follows:-
The spanners now in use for boiler tubes are formed with projecting teeth
which often injure or distort the shape of the tubes or fittings.
Our improved spanner is curved, and hinged together in two or more sections.
It thus forms a jointed ring or circle the ends of which overlap and can be drawn
together so as to tighten it on a tube or other cylindrical article, giving an equal
stress all round. This is effected by a lever arrangement, one end of which
forms the handle.
Referring to the two overlapping ends of this jointed ring, one terminates
in a V-shaped plate in which is a bolt hole and a curved slot. The other
terminates in a lug or ear and has a bolt hole opposite the slot in the ✓ plate.
The handle is forked at one end, and this fork embraces the V plate and lug
before described. There are two bolt holes in the fork, so placed as to engage
with the openings in the V plate and lug.
Bolts are inserted in both these series of holes, and the one nearest to the
handle becomes the fulcrum of the lever formed by the handle, which enables
the end of the fork to draw the other bolt and the lug along the curved slots thus
tightening the ring over anything enclosed in the spanner.
Our spanner can be made in different sizes and is especially suitable for grip-
ping tubes and other circular fittings such as sleeves, nuts and the like, as it
obtains a firm grip without injury to the article held.
Dated thin 15th day of Dram
1000

page_text: and ALBERT DANIEL BYRNE, of 44, Bromehead Street, Commercial Road, London,
Engineer, 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 spanners now in use for boiler tubes are formed with projecting. teeth
which often injure or distort the shape of the tubes or fittings.
Our improved spanner has no teeth but is formed of curved sections hinged
together. It thus forms a jointed ring or circle the ends of which overlap and
can be so tightened or drawn together as to fasten it on a tube or other cylindrical
article, giving an equal stress all round.
This is effected by a lever arrangement, one end of the lever forming the
handle.
Referring to the two overlapping ends of this jointed ring, one terminates
in a V shaped plate, in which is a bolt hole and a curved slot.
The other end of the ring terminates in a lug or ear and has a bolt hole opposite
the slot in the V shaped plate The handle is forked at one end, and this fork
engages with and embraces the V shaped plate and lug before described. There
are two bolt holes in the fork, so placed as to engage with the openings in the
V plate and lug.
Bolts are inserted in both these series of holes, and the one nearest to the
handle becomes the fulcrum of the lever formed by the handle, which enables
the end of the fork to draw the other bolt and lug along the curved slot thus
tightening the jointed ring over anything enclosed in the spanner.
Our spanner can be made in any size and is especially suitable for gripping
tubes and other circular fittings such as sleeves, and nuts and the like, as it obtains
a firm grip without injury to the article held.
I will now describe my invention with reference to the accompanying
drawings:
Fig. 1, shows a plan of our improved spanner, the lug and part of the curved
slot and V plate being indicated by dotted lines.
Fig. 2, shows an edge view of the same partly in section.
Fig. 3, shows an edge elevation taken from the side opposite to Fig. 2.
a, shows the lever handle.
a¹, shows the forked end of same.
b, shows the jointed ring.
, shows a joint on same.
c, shows the V shaped plate, at one end of ring.
c', shows the curved slot in same.
d, shows the lug on opposite end of ring.
e, e, shows the two bolts, e¹ being the fulcrum.
f, shows a washer of same thickness as the lug, d.
The method of working the spanner is as follows:
It is slipped over the tube, or placed round same by withdrawing the pin c.
The lever handle is then worked to one side, thereby causing the jointed ring to
grip the tube, when a further pressure of the handle enables the spanner to
rotate the tube in the required direction. The spanner disengages itself by
reversing the handle. It will be seen that the pressure on the tube being uniform
no injury will be caused by the action of the spanner.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. A spanner without teeth (for tubes and the like) constructed of a jointed
ring operated by a lever forming the handle of same as herein described and
set forth.

page_text: 2. In a spanner for tubes and the like the jointed ring b, triangular piece, c,
lug, d, lever handle, a, slot, c¹ and bolts, e, e', as herein described and set forth.
Dated this 8th day of September 1900.
S. S. BROMHEAD,
Patent Agent,
33, Cannon Street, London. E.C.