Improvements in Spanners.
Year: 1894

page_text: Date of Application, 9th Aug., 1894-Accepted, 15th Sept., 1894
Improvements in Spanners.
I, EDWIN CHARLES CUMMING of 3 Albert Street Arbroath N.B. Commercial
Clerk 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 relates to improvements in spanners and has for its object to
provide a simple, handy, and easily-worked tool.
For this purpose I construct my improved spanner so as to be operated by a
ratchet and pawl arrangement consisting of a toothed wheel carried by and capable
of revolving in one end of the handle forming the said spanner.
A loose plate,
screwed to the handle, keeps the ratchet wheel in position, and a hexagonal opening is
formed in the said wheel of a size to fit the nut to be operated upon.
In the accompanying drawings
Fig. 1, is a side view of my improved spanner with the loose plate removed,
Fig. 2 is a horizontal section with the loose plate in position and
Fig. 3 is a side view with the loose plate in position.
a is the handle or body of the spanner formed at one end with a circular part a¹
recessed at a2 and provided with a circular opening a³. b is the toothed ratchet
wheel carried in the recess a² and formed with the circular extensions b1, b2 the first
of which fits into the opening a³ and the second in a similar opening formed in a
loose plate c. This plate is fixed to the part a¹ by means of screws d¹. The
wheel b is formed with an opening 63 of a hexagonal shape to fit the nut.
e is the
pawl or click pivoted on the screw e¹ and kept in gear with the teeth of the ratchet
wheel by a spring e. It will thus be seen that the part a¹ of the spanner revolves
freely around the ratchet wheel thereby causing the pawl to turn the said wheel and
consequently the nut passing through the opening 63 formed therein.
In order to turn the nut in a contrary direction the spanner is turned over and
placed on to the nut on the reverse side to that described above.
It will be seen that my improved spanner acts in the same manner as a ratchet
brace and is especially useful where the position of the nut allows only of a partial
turn being made in which case it is not necessary to remove the spanner from the
nut as it can be turned back without turning the nut with it when it is again ready
for its forward or acting stroke.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be described, I declare that what I
claim is :-
1. A spanner consisting of a handle a formed with a recessed part a' for carrying
ratchet wheel b and a spring pawl e gearing therewith, the said wheel and pawl
being kept in position by a loose plate c substantially as described and shown.
2. In a spanner as above claimed, forming the ratchet wheel with a hexagonal
opening 63 and circular extensions b', ' substantially as described and for the purposes
specified.
3. The improved spanner substantially as described and shown in the accom-
panying drawings.
Dated 171 1
100
GEO. H. RAYNER,
37, Chancery Lane, London, W.C., Agent for the Applicant.