Improved Apparatus for Applying Driving Belts to Pullies.
Year: 1891

page_text: Date of Application, 5th June, 1891
Complete Specification Left. 4th Mar., 1892-Accepted, 16th Apr., 1892
PROVISIONAL SPECIFICATION.
Improved Apparatus for Applying Driving Belts to Pullies.
1, ERNST HAMMESFAHR, of Solingen Foche, German Empire, do hereby declare
the nature of this invention to be as follows:-
This invention relates to improved constructions of apparatus for applying driving
bands to pullies, which consist mainly in an arm with a fixed or adjustable finger
for seizing the belt, which arm has a fork engaging with the pulley shaft in such
manner that its limbs may be made to press upon the shaft with sufficient friction
to cause the arm to partake of the motion of the shaft, whereby the said finger is
made to place the belt upon the pulley.
The said arm with its finger and fork can be arranged in a variety of ways; thus
according to one arrangement, the arm has the spring fork attached to its side at an
intermediate point of its length; the one end of the arm carries an adjustable
weighted slide, on which is the finger for placing the belt, this end being by reason
of the weight, in a lowered position when the arm is not acted upon.
The upper end of the arm, which projects some distance beyond the shaft, has
pivotted to it a rod which extends down a sufficient length to be manipulated
by hand.
When no pull is exercised upon the handle, the weight of the arm keeps it in the
lowered position described. When however a pull is exercised on the handle the
arm is thereby made to press one limb of the spring fork against the shaft, and this
consequently carries the spring fork and arm round with it, causing the finger to
lay the belt round the pulley, the arm being then allowed to descend again by its
weight on the other side of the pulley so as to be clear of the belt.
The spring fork may, according to one arrangement, be a broad loop of steel open
on one side, the limbs being so bent that their ends are closer together than the
part which corresponds to the diameter of the shaft, so that they have to be sprung
open in order to place the fork upon the shaft. The opening of the fork is made
adjustable by means of an adjusting screw, so as to suit shafts of different sizes.
Or the fork may be of two separate parts secured by screws so arranged as to
render their opening and the spring pressure which they exert upon the shaft
adjustable.
The forks may either be fixed on the arm as above stated or they may be
adjustably attached thereto, in which case the belt finger can either be also
adjustable as described, or fixed. The pivot of the handle may also be rendered
adjustable on the arm, so that instead of being situated at one end thereof as
described, it can be shifted to any intermediate point of its length. The angular
position of the arm relatively to the handle may be made capable of being
temporarily fixed, for facilitating the placing of the apparatus upon the shaft, by
fixing to the pivot on the arm a small toothed wheel, and by providing on the
end of the handle a sliding spring catch, actuated by a cord passing down the
andle, so that for placing the fork of the arm on the shaft, the catch is allowed to
rear with the wheel, and thus hold the arm and the handle in a fixed relative
osition, while when it is desired to place the belt on the pulley, the catch is
vithdrawn so that the arm can turn relatively to the handle as above described.
Dated this 5th day of June 1891.
ABEL & IMRAY,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improved Apparatus for Applying Driving Belts to Pullies.
I, ERNST HAMMESFAHR of Solingen Foche, German Empire 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 constructions of apparatus for applying
driving bands to pullies, which consist mainly in an arm with a fixed or adjustable
finger for seizing the belt, which arm has a fork engaging with the pulley shaft in
such manner that its limbs may be made to press upon the shaft with sufficient
friction to cause the arm to partake of the motion of the shaft, whereby the said
finger is made to place the belt upon the pulley.
The said arm with its finger and fork can be arranged in a variety of ways;
Figures 1 to 8 of the accompanying drawings shew some examples thereof.
In all cases a is the actuating rod, the arm pivotted thereto, e the fork on the
arm and d the finger thereon for seizing and laying on the belt.
In the arrangement at Figures 1 and 2 the manipulating rod a is connected to
the arm at one end thereof by a pivot a', and the finger d is adjustable upon the
arm and fixed in position by a setting screw or other means. The fork is fixed
to the arm at a point between the pivot a' and the adjustable finger d, and consists
of two broad spring limbs which are so bent as to embrace the shaft round a
considerable portion of its circumference. The ends are made to approach
somewhat nearer together than the diameter of the shaft, so that the fork requires
to be pressed with its open side with some force against the shaft in order to inake
it spring over it, and is secured from falling off by the ends springing together
again when in position. For removing the fork it requires to be drawn from the
shaft with a corresponding amount of force. The weight of the finger with its
adjusting arrangement and the discs between which the belt lies, causes the
arm to hang down when in a position of rest.
The fork is consequently so fixed on the arm that its open side is directed
towards the finger d, so that the fork can be conveniently pushed on to the shaft in
a downward direction.
The finger is made adjustable on the arm in order that it may be adjusted
relatively to the fork e to suit pullics of different diameters. The finger might
however be fixed on the arm, and the fork be made adjustable thereon, as shewn
for example at Fig. 8, or both parts may be made adjustable.
Figs. and 2 shew the application of this construction of the apparatus for
placing on a belt running vertically, while Figs. 3 and 4 shew the application for a
horizontal belt.
After the proper adjustment of the finger or the fork, or both, to a distance
corresponding to the radius of the pulley, the fork is placed on the shaft, and in
consequence of the friction caused by the pressure between it and the shaft, it
together with the arm begins to revolve with the latter; by such motion the finger
is made to lift the belt and to carry it onto the pulley. the rod a being thereby
moved underneath the shaft from the positions shewn in Figs. 1 and 3 into those
shewn at Figs. 2 and 4.
As will be seen from these examples, the fork can be placed in position on the
shaft, either when situated at the inner side of the arm b, as at Fig. 1 or when
situated at the outer side, as at Fig. 3.
In both cases the placing of the belt is effected in the same manner, the
movement being in the first case from right to left and in the latter case from left
to right.
The fork can be formed out of a single piece of bent broad spring steel, as shewn
in Figs. 1 to 5 and Fig. 8, or it may be made of two separate limbs c¹ c² c'e', as
shewn for example in Figs. 6 and 7.

page_text: In the case of Fig. 6, a hook-shaped limb c¹ is made to fit over the shaft and a
second spring fitting over c¹ has its pressure adjusted by means of a screw el
screwing into the arm b. In the case of Fig. 7 the two limbs care secured
together on the upper side by two screws e, the one limb being secured to
the arm b.
It will be seen that the limbs of the fork have the opening between them
adjusted either simply by screwing or unscrewing the adjusting screw e, Figs. 1
and 2, or in the case of forks formed of two parts, as at Fig. 6, by moving the one
limb nearer to or farther from the other by means of the screw e screwing into the
arm, as at Fig. 6. On releasing the screws, the spring arms e c'e² spring back into
their original positions. When two setting screws are employed, the fork can be
made without spring action, being adjusted in width by the adjustment of the
screws e, as at Fig. 7. But with this arrangement it is also preferable to make
the limbs of the fork with spring action.
It will be understood that the above described constructions of the forks night
also be made adjustable longitudinally on the arm b.
Figs. 9 to 12 shew arrangements in which the rod a can be temporarily secured in
various fixed angular positions relatively to the arm b, whereby the fork e can be
placed upon the shaft in any desired position, either from the top or from the side
or bottom.
For this purpose the pivot a is fixed rigidly to the arm and on the
pivot is fixed a toothed disc a² of any suitable construction.
The rod is rotatable on the pivot a', and it carries a sliding bolt or catch a³ which
can spring into the spaces of the toothed disc and can be withdrawn therefrom by a
cord or rod s passing down to the lower end of the rod a, so that on moving the
latter into any desired angular position relatively to the arm b, and then allowing
the bolt to spring into the teeth of the disc a, the rod will be rigidly secured to the
arm in such angular position. On then placing the fork c ou the shaft and
withdrawing the bolt from the toothed disc, the arm can then revolve with the
shaft while turning on the pivot a¹ for placing the belt on the pulley, as in the
previous arrangements; as indicated by the dotted lines in Figs. 9 and 11, the rod
can be fixed in any other position relatively to the arm.
The pivot a with toothed disc a² can be made longitudinally adjustable on
the arm, as shewn by way of example at the side view Fig. 11A. In this
arrangement the pivot is fixed to a slide that can be moved in a slot 6 in the
arm, and is fixed in any desired position by the screw . Any other suitable
arrangement may be employed for this purpose.
In the arrangement shewn at Figs. 11 and 12, the rod a is arranged between the
fork and the finger d.
The forks are shewn with straight angular limbs in Figs. 9 to 12, they can
however be formed in any other manner with or without spring action as described
with reference to Figs. 1 to 8.
Figs. 9 and 10 shew the instrument in a position for placing the belt on the
pulley in the direction from below upwards, while Figs. 11 and 12 shew the
position for placing the belt on from above downwards. The finger having first
been adjusted on the arm to a position corresponding to the diameter of the pulley,
the fork is placed by the rod a over the top of the shaft, as closely as possible to the
side of the pulley, after which, on withdrawing the locking bolt a from the toothed
disc a², the strap is laid hold of by the finger as this is carried round with the shaft
by means of the fork and arm, and is laid thereby on to the pulley, the fork being
pressed by the rod a into sufficient close frictional contact with the shaft to cause
the same to be carried round thereby as described. During such motion the end
of the rod a is carried round the underside of the shaft.
It will be readily seen that with the above described apparatus, as the arm and
finger are supported on the shaft by the fork, it is not necessary in placing the belt
to exert any lifting power, which greatly facilitates the placing of the belt. Also,
as the rod a only requires to make a comparatively small motion, the operator can
effect the placing on of the belt without moving from his place.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed declare that what I
claim is :-
-
1. Apparatus for applying belts to pullies consisting of the combination of a
fork or saddle-piece such as cc' c² e or c adapted to fit on to the shaft, with an arm
such as carrying a finger such as d for laying hold of the belt, and a manipulating
rod such as a pivotted to the arm b, the said parts being so arranged that the fork
on being placed upon the shaft is carried round by frictional contact therewith,
thereby causing the arm & to revolve and to place the belt on the pulley by means
of the finger d, substantially as described.
2. In apparatus for applying belts to pullies such as is referred to in the
preceding claim, constructing the fork either of a single piece or of two separate
pieces adjustable by screws, and either with or without spring action, and either
fixed or adjustable upon the arm b, substantially as described.
3. In apparatus for applying belts to pullies such as is referred to in the
preceding claims, the combination with the arm b, and rod a of a locking appliance
such as a toothed disc a fixed on the arm, and a locking bolt a³ on the rod,
whereby the said two parts can be temporarily locked together in any desired
angular position, substantially as described.
Dated this 4th day of March 1892.
ABEL & IMKAY,
Agents for Applicant.