Improvements in and relating to Keys for Shafting.
Year: 1896

page_text: Date of Application, 15th Oct., 1896
Complete Specification Left, 15th July, 1897-Accepted, 28th Aug., 1897
Improvements in and relating to Keys for Shafting.
I, FREDERICK WILLIAM LANCHESTER, of Cobley Hill, near Alvechurch, in the County
of Worcester, Engineer, do hereby declare the nature of this invention to be
as follows:-
This invention relates to improvements in keys used for securing the boss of a
wheel to its shaft or like purpose, and has for its object to provide a ready means by
which the key may be drawn when required.
In one mode of carrying this invention into effect I arrange a cylindrical screwed
head on the key and a shoulder on the shaft about flush with the wheel boss. A
screwed nut is employed for the removal of the key.
When the wheel is at the end of the shaft no shoulder is required.
Dated this 15th day of October 1896.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., Agents.
аци
I, FREDERICK WILLIAM LANCHESTER, of Cobley Hill, near Alvechurch, in the County
of Worcester, 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 :-
This invention relates to improvements in keys used for securing the boss of a
wheel to its shaft or like purpose, and has for its object to provide a ready means by
which the key may be drawn when required.
Two modes of carrying this invention into effect are illustrated in the accompanying
sheet of drawings in which ;-
Figure 1 is a vertical section through a pulley and boss showing the improved key
applied in the centre of a shaft.
Figure 2 is a similar section showing the improved key applied at the end of
a shaft.
Figure 3 is a side elevation of a tool applied to withdraw the key shown on
Figure 2.
Referring to Figure 1 of the drawings: In this mode of carrying the invention
into effect there is arranged a cylindrical screwed head A on the key B, this key and
its key-way being of the ordinary form in use. Upon the shaft C there is arranged
a shoulder D and this shoulder is about flush with the boss E of the pulley. The
key B is driven home in the usual manner, and when it is desired to withdraw the key,

page_text: an ordinary nut is put upon the head A and screwed down against the shoulder D and
boss E thus removing it easily.
Referring to Figures 2 and 3 of the drawings: When the pulley or wheel is at
the end of the shaft no shoulder is required and the boss E is arranged so that one
side of it is flush with the end of the shaft C. A similar key B with a screwed end A
is employed and to remove it rapidly and easily a lever nut and handle F similar
to that shown in side elevation in Figure 3 may be used. This method is specially
applicable where, keys have to be drawn frequently for inspection of parts, and both
methods are of great advantage in constructions such as motor cars where space is a
consideration and great difficulty is experienced in withdrawing flywheel or pulley
keys by the usual manner of hammer and drift.
It is preferred to form the extremity of the key with a. spigot or boss which
prevents the mutilation of the screw thread on driving the key into position.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be perforined, I declare that what I
claim is;-
1. Means for the fixture of wheels upon shafts and for the withdrawal thereof
consisting in combination, of a shoulder on the shaft flush with the wheel boss, a
key fastening the shoulder and wheel boss together and, having a screwed extension
thereon to which a, nut can be applied as a means of withdrawal.
2. Means for the fixture of wheels upon shafts and for the withdrawal thereof
consisting in combination of the wheel boss arranged flush with the end of the
shaft, a key fastening the shaft and wheel boss together, and having a screwed
extension thereon to which a nut or nut, lever can be applied as a means of
withdrawal.
3. A key for the fixture of wheels to shafts having a screwed extension thereon, and
having also a terminal spigot, or boss, substantially as and for the purposes herein-
before described and as illustrated.
Dated this 15th day of July 1897.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham,, Agents.