Improved Means of Protecting Revolving Shafting and its Appurtenances.
Year: 1898

page_text: Date of Application, 28th Oct., 1898-Accepted, 3rd Dec., 1898
COMPLETE SPECIFICATION.
Improved Means of Protecting Revolving Shafting and its
Appurtenances.
I, JACQUES BUNIMOWITSCH, of 23, Wielandstrasse, Frankfort-on-the-Main, in the
Empire of Germany, Merchant, 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 improved apparatus for protecting or guarding revolving
shafting, such as power transmission shafting and the like, by means of which the
familiar danger of workpeople, employed in the neighbourhood thereof, being caught
thereby, is obviated in a simple and effective manner.
The customary casings at present employed are not in some cases effective, owing
to the possibility of their being opened or removed. Once opened, it is sometimes
the case that they remain so, owing to the carelessness or negligence of the workpeople.
They are also frequently inconvenient to fix, and, moreover, occupy an excessive
space.
Apparatus constructed according to the present invention occupy small space, are
applicable to all varieties of shafting, are of simple construction, and-owing to the
nature of their construction it is impossible that they should not be in their place
when the critical moment arrives. Nor is there any occasion whatever for the work-
people to open or remove such apparatus, as they do not in any way affect the
accessibility of the bearings, belt pulleys, lubricators and the like.
In the annexed drawings:
Figure 1 is a side elevation of a simple form of apparatus according to this invention,
and Figure 2 is a longitudinal section thereof.
Figure 3 is a group illustrating several forms of the guard, in
section.
cross
Figure 4 is a longitudinal section illustrating a protective casing or guard having
a widened portion adapted to enclose the flanged coupling of a revolving shaft, and
Figure 5 is a cross section thereof.
Figure 6 is a longitudinal section illustrating a protective casing or guard baving
two widened portions, one for enclosing the key and boss of a pulley, and the other
for enclosing an adjustable collar upon a shaft, and Figure 7 is a cross section
thereof.
The protective casings H, H1, H2, H3 each consist of two trough-shaped sections of
suitable length, which are placed around the shaft or part to be protected and are
united at their edges in any suitable manner, for instance by means of screws, nails,
hooks and eyes or their equivalent. The tubes thus formed must have an internal
diameter somewhat larger than the diameter of the shaft, coupling, adjustable collar,
key, or other part to be protected, and in order that the surface contact between the
shield or casing and the shaft or part protected may be reduced to a minimum there
are provided on the internal surface of such casings several distance pieces or bearing
surfaces (Figure 2) at suitable intervals. Such bearing surfaces h are divided, in
order that they may be placed on the shaft or other part, and make a loose fit
with such shaft, whereby the shield or casing H may be freely revolved upon the
shaft, W.

page_text: :
Instead of the bearing surfaces h of Figure 2, roller-bearings R (Figures 4 and 5) or
ball-bearings K (Figures 6 and 7) may be employed, as required, whereby the frictional
contact between the casing H and the shaft W is considerably reduced. The casing H
is therefore more readily arrested by anything coming in contact therewith. The
roller-bearings and the ball-bearings must of course (as in the case of the bearing
surfaces h) make a loose fit with the shaft W, in order that the casings may
freely revolve upon such shaft.
The flanges in which the rollers R are journaled, as well as the sockets for the
balls K, may be made of any suitable material, and must be divided, with the
portions of the casing, in order that they may be placed around the shaft or other
part.
In order to shield projecting parts upon the shaft W, such as couplings, adjustable
collars, keys, and the like, protective casings H1, H2, H3, which are of correspondingly
greater width, are arranged at the proper places, upon the narrower casing H. These
widened casings may be of any suitable shape in longitudinal section, namely,
cylindrical, as H1, H2, or bell-mouthed, as H³.
When the shaft W is revolving, the casings H, H', H2, H3, will also rotate, but they
may be touched without incurring the least danger, because they will be immediately
arrested. In the event of intentional or accidental displacement of belting, the
above described shields will be found a considerable improvement upon the present
fixed protective casings, as there is nothing to prevent such belting continuing to run
upon the casings, because the casings may, without interfering with the shaft, either
be stopped, or be revolved more quickly or more slowly, in the same or in the opposite
direction as regards the shaft.
The protective casings herein described may be made of any suitable material,
namely, wood, metal, papièr-maché and the like, and, as indicated in Figure 3, of any
cross-section, namely, with or without projecting angles.
The longitudinal union of the two halves of the protective casing may consist of dove-
tails, grooves and tenons, or lap joints having an acute or obtuse angle, according to
various requirements.
Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
Tubular protective casings of wood, metal, papier-maché, or other suitable material,
capable of free revolution upon and shielding revolving shafting and its appurtenances,
which casings are separated lengthwise in order that they may be placed in position,
and are united by screws, catches, or their equivalent; the internal diameter of said
casings being greater than the part to be protected and being provided with bearing
surfaces (h) or rollers (R) or balls (K) which bear upon the shaft (W), arranged in such
a manner that the casings (H) and their widened parts (H1, H2, H³) for protecting
couplings, collars, keys, or other appurtenances, inay rotate freely upon said shaft (W),
whereby, in the event of such casings coming in contact with an object they
"may be arrested without interfering with the revolution of the shaft (W), or
may be turned faster or slower than the latter, and in the same or in the opposite
direction.
Dated this 27th day of October 1898.