A New or Improved Device for Placing Driving Belts or Bands Over Fast and Loose Pulleys.
Year: 1892

page_text: Date of Application, 25th Apr., 1892-Accepted, 4th June, 1892
BELE
A New or Improved Device for Placing Driving Belts or Bands Over
Fast and Loose Pulleys.
I, REINHARDT MARTIN of Lucasine near Ratibor Germany Millwright, 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 a new or improved device for guiding driving belts or
bands over fast or loose pulleys, this being effected safely and conveniently over
pulleys running in a vertical as well as in a horizontal direction.
Whereas in belt shifting devices such as hitherto used, the belt was first seized
from below and raised to the periphery of the pulley, when the shifting device was
slipped between the belt and the pulley; the raising of the belt to the periphery
of the pulley is according to my invention effected by hand when the device which
is formed with hooks at the ends is placed across the belt and the pulley in such a
manner that one of the hooks aforesaid is safely guided against the edge of the
pulley and is bound to be followed by the belt. The above mentioned device is
connected by a universal joint to an operating rod which is rendered resilient by
means of a wire rope core.
The accompanying drawings illustrate the construction and mode of working of
my improved device for guiding belts over fast and loose pulleys.
Fig. 1 is a cross section, Fig. 2 is a plan of the upper end of the operating rod,
Fig. 3 shows the mode of jointing the device, Figs. 4 and 5 illustrate the mode of
slipping the belt on pulleys turning in a vertical direction, looking on the right
hand side of the driving pulley, while Fig. 6 shows a similar view looking on the
left hand side. Figs. 7 and 8 show the mode of slipping the belt over pulleys
turning in a horizontal direction.
As shown in Fig. 1 the device for slipping on belts consists of a clamp A which
is flat in cross section and has long tail like bent over ends a and a¹. This clamp
is curved throughout its centre to correspond with the curvature of the pulley.
On the right hand side the same is firmly connected by a screw 6 with an
Lshaped piece c which receives, in the longitudinal sense of the clamp, the bolt d¹
of a hinge joint d. The nut e ensures the connection in such a manner that the
pin d can move freely and readily within the piece c. Over the hinge joint d is
placed the forked hinge joint, both being connected by a bolt. The joint f forms
at the same time the fixed head piece of the operating rod S, and is screwed upon
a firmly fixed screw h of the latter, i being a counter nut serving to consolidate the
whole. The rod S is composed of a wire rope core covered with leather or paper
pulp discs, so that this rod may be conveniently bent in all directions.
Fig. 3 illustrates three positions of the said device A, the two outermost positions
viz. 1 and 3 being limited by a stop of the head piece, while 2 shows the mean
position; the turning motion takes place upon the hinge pin 9, while in the
position 3 the clamp turns upon the pin d'. The double motion of the clamp A
has for its object to allow of the belt being conveniently slipped on from any place
upon pulleys turning in a vertical as well as in a horizontal position, while this
operation can be effected from the right as well as from the left side of the pulley,
the space required being only from about 4 to 5 cs.
The curved form of the ends a of the clamp A. has for its object to enable this,
and to grip a little behind the edge of the pulley when the clamp is placed thereon,
so as to prevent the latter from slipping off as it is being placed in position, while
the belt is likewise prevented from slipping off by the arm a', thus allowing of the
belt being safely passed over the pulley. The clamp is about from 1 to 4 cs. wider

page_text: than the pulley to which it is applied and can be changed to suit different widths
of pulleys by merely loosening the screw b of the L shaped piece c.
The operation of my improved device for guiding driving belts on fast and loose
pulleys is as follows:
For pulleys rotating in a vertical direction, the belt resting loosely upon the
shaft is seized and raised with the left hand, while the apparatus is held in the
right hand which is placed near the head piece of the operating rod ready to fix
it in position in the manner shown in Fig. 2. When the belt has been pushed as
far as the periphery of the pulley, the same is fixed in position by the clamp A
which is hooked on the left hand edge of the pulley. The left part of the belt
being now released, the device and the belt are pushed upwards by the right hand
in the direction of motion of the driving pulley until in consequence of an increase
of friction this belt is carried away with the pulley and reaches its central and
proper position thereon, when the operating rod can be readily pulled away by
hard.
Fig. 5 shows the position of the device after this operation, the belt having
removed the same automatically from the pulley and pushed it on one side in the
position shown in dotted lines, as at the last moment when the belt slips onto the
pulley it gives a blow to the device and thus throws it off automatically. Should
the belt have to be slipped on underneath instead of above the pulley the device
would, after having been first raised, be placed in the position shown in dot and
dash lines.
Fig. 6 shows the method of slipping a belt on a pulley from the left hand side,
while Figs. 7 and 8 illustrate the mode of slipping the belt on pulleys rotating in
a horizontal direction, which will be readily understood from the foregoing
description.
It may be worthy of remark that, with the devices hitherto used, it was not
possible to place a belt on pulleys rotating in a horizontal direction. The advan-
tages of the belt slipping device above described are as follows:-
(1) Smooth shape and simple and durable construction weighing from 2 to 3 kgs.
May be used for pulleys rotating in a vertical as well as in a horizontal
direction. May be slipped on from the left as well as from the right hand side
and will be found to answer the purpose, whatever may be the diameter, the speed
and the direction of rotation of the pulley.
(3) The device which requires a very small space for its operation, is movably
connected with the flexible operating rod, in consequence whereof it cannot be
damaged by any blow from the belt which runs at once smoothly on to the pulley.
(4) The operating rod bears resiliently against the pulley shaft when the device
is secured in position (as shown in dotted lines in Fig. 5) and cannot thus cause
any injury to the latter.
(5) According to the direction of rotation of the pulley, the device can be rapidly
adjusted by hand upon the pin d' of the hinge joint without having to loosen any
screws (Fig. 3), the same being placed at right angles to the operating rod for
pulleys running in a vertical direction (Figs. 4, 5 and 6), and stretched for those
turning in a horizontal direction (Figs. 7 and 8).
(6) The operative guiding the belt onto the pulley need not change his position,
the clamp A being automatically guided with the belt over the pulley.
(7) The belt is seized from the top and thus where free there is no need of
slipping, as with the devices hitherto used, a piece between the belt and the pulley.
There is no doubt but that the last mentioned defect which is very important,
as the insertion of this piece tends to unduly increase the width of the belt, is
fully obviated with my improved device.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
(1). A device for guiding driving belts onto fast and loose pulleys, characterized

page_text: by a clamp A connected by means of two joints 9 d with the head piece of an
operating rod S in such a manner that, as soon as the belt is raised, the clamp is
placed by the joint g across the belt and pulley, its bent ends being held in a radial
direction by the joint d in consequence of the increased friction developed by the
rotation of the pulley substantially as herein described and shown.
(2) In the device above claimed, the operating rod S of flexible material which
yields when pressed by the pulley shaft or by any other obstacle, substantially as
herein described and shown in the accompanying drawings and for the purpose set
forth.
Dated this 25th day of Anvil 1900
GEO. H. RAYNER,
37, Chancery Lane, London, W.C., Agent for the Applicant.