A LOCKING DEVICE FOR THE COVERS OR GUARDS OF ROTATING SHAFTS
Year: 1887

page_text: I WILLIAM TAYLOR of 19 Hill Street Oldham in the County of Lancaster Engineer
do hereby declare the nature of said Invention for A LOCKING DEVICE FOR THE
COVERS OR GUARDS OF ROTATING SHAFTS, which Invention has been communicated to
me from abroad by F. Lejeune of Teesdorf Vienna in the Empire of Austria Cotton
Spinner, 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 the covers or guards which are employed in connection
with rotating shafts and the object of the Invention is to provide a device which will
automatically lock such a cover or guard as soon as the shaft is set in motion and
which will prevent the cover or guard from being unlocked and turned back or
removed until the rotation of the shaft ceases.
And in order that this Invention may be fully understood and readily carried into
effect I will describe the accompanying Sheet of Drawings reference being had to the
figures and letters marked thereon.
Figure 1 is an elevation and Fig. 2 a plan of the locking device arranged and
applied according to this said Invention.
a designates the movable cover or guard hinged or attached at a to the lower casing b
and e the rotating shaft supported in a bearing in the pedestal d. On the shaft c
which turns in the direction indicated by the arrows is fixed a collar e which is formed
with a projecting portion having an inclined surface at e': this collar e is not shown
in the elevation Fig. 1.
On the bearing of the shaft c, or it might be on the said shaft, is fitted loosely a
boss which terminates in a hook fand is prevented from turning on its axis by a stud g
secured to the pedestal d. In the boss is a recess with an incline f corresponding to
the incline e on the collar e. The hook f" engages a stud h which is fixed on the cover or
guard a so that when the parts are in the relative positions shown on the Drawings
and the shaft e is being rotated the cover or guard a is locked by the said hook f¹ and
stud and cannot therefore be turned back or removed. When the shaft c is stopped
however with the incline e¹ on the collar e agreeing in position with the incline on
the boss the recess in the latter allows the boss to be moved close to the collar e

page_text: thereby disengaging the stud / from the hook f¹ and releasing the cover or
guard-a.
Immediately the shaft c begins to revolve again the incline e¹ throws the bossf back
into the position shown on the Drawings thereby bringing the hook f¹ over the stud h
and automatically locking the cover or guard a.
It will be readily understood that various modifications in the details and in the
arrangements of the parts may be made without departing from the nature of this
said Invention as communicated to me for example any suitable equivalents for the
hook and stud h and also for the incline e¹ may be employed and again the boss f
or its equivalent may be prevented from turning on its axis by any suitable means
other than the stud g.
Having now particularly described and ascertained the nature of this said
Invention and in what manner the same is to be performed I declare that what
I claim is
1.-A locking device for the movable covers or guards of rotating shafts said
device consisting essentially of a stud or equivalent on the cover or guard in
combination with a hook or equivalent operated automatically by the rotation of the
shaft to engage the stud and lock said cover or guard until the rotation of the
shaft has ceased substantially as herein described with reference to the Drawings
annexed.
2. The general construction combination and arrangement of parts constituting a
locking device for the covers or guards of rotating shafts substantially as herein shown
and described.
H. B. BARLOW,
17, St. Ann's Square, Manchester,
Agent for Applicant.