Improvements relating to the Gearing and Ungearing of Machine Belting.
Year: 1890

page_text: Date of Application, 28th Oct., 1890
Complete Specification Left, 22nd July, 1891-Accepted, 22nd Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements relating to the Gearing and Ungearing of Machine
Belting.
I EMIL AUGUST AUS'M WEERTH of Leipzig in the Empire of Germany
Manufacturer do hereby declare the nature of this invention to be as follows:―
This invention relates to machine belting and consists in the combination with a
fixed driving pulley of a device as hereinafter described for receiving the driving
belt when shifted off said pulley and holding said belt loosely so that the latter is
free from strain or tension when in its position of rest.
To this end there is arranged in proximity to the driving pulley a curved plate
of semicylindrical shape of a less radius than the driving pulley but having its axis
in the line of the axis of the latter. This plate is held against revolution; it may
be a wheel or section of a wheel supported loosely on the main shaft. The radial
space between this plate and the rim of the driving pulley is completed and
occupied by a conical flange formed with the driving pulley and forming an
inclined plane between the plane of the periphery of the pulley and that of the
plate aforesaid. The latter may be either constructed to slide back and forth into
or within the pulley, it being then provided with a raised flange on its edge remote
from the pulley or the said flange inay be replaced by a curved bar movable over
the face of the plate laterally to and from the driving pulley.
A belt fork is provided and connected to the movable plate or to the movable
curved bar respectively so that both parts are moved simultaneously when the
belt is to be shifted from the driving pulley to the resting plate and vice versa.
The resting plate may be provided with rollers revolving balls or the like to
avoid friction between the belt and the plate at the moment when the belt is partly
in contact with the driving pulley and partly with the plate; this device being of
greater advantage with broad belts.
Dated this 18th day of October 1890.
HERBERT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
Improvements relating to the Gearing and Ungearing of Machine
Belting.
I EMIL AUGUST AUSM WEERTH of Leipzig in the Empire of Germany
Manufacturer 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 machine belting and consists in the combination with a
fixed driving pulley of a device as hereinafter described for receiving the driving
belt when shifted off said pulley and holding said belt loosely so that the latter is
free from strain or tension when in its position of rest.
To this end there is arranged in proximity to the driving pulley, a curved plate,
the form of which is principally that of a section of a cylinder of a less radius than
the driving pulley but having its axis in the line of the axis of the latter; this
plate is held against revolution; it may be a wheel or section of a wheel supported
loosely on the main shaft or upon a separate support.
The radial space between this plate and the rim of the driving pulley is completed
and occupied by a conical flange formed with or connected to the driving pulley,

page_text: {'
and
orming an inclined plane between the plane of the periphery of the pulley an
that of the plate aforesaid. The latter may be either constructed to slide back an
forth into or within the pulley, it being then provided with a raised flange
equivalent projections on its edge remote from the pulley, or the said flange
projections may be replaced by a curved bar movable over the face of the plat
laterally to and from the driving pulley the plate being then stationary.
A belt fork is provided and connected to the movable plate or to the movabl
curved bar respectively so that both parts are moved simultaneously and preferabl
in the manner hereinafter described when the belt is to be shifted from the driving
pulley to the resting plate and vice versa.
The resting plate or its flange or projections or the movable arm may be provided
with rollers, revolving balls or the like to avoid friction between the belt and the
plate, flange or movable arm at the moment when the belt is partly in contact
with the driving pulley and partly with the plate, this device being of greater
advantage with broad belts.
The annexed drawings illustrate the method of performing this invention.
Fig. 1 is a side elevation.
Figs. 2 and 3 sectional front elevations and
Fig. 4 a front elevation of a driving pulley fitted with a movable rest plate.
is the driving pulley. a¹ the conical lateral extension formed in one piece
with said pulley. is the rest plate in the form of a section of a cylinder. r is the
belt moving in the direction of the arrow in Fig. 1.
slide on the shaft o in such a way that its edge towards the entering rim of the belt
The rest plate is mounted to
projects beyond the line of entering contact with the belt, while its edge on the
leaving rim of the belt does not extend so far that the belt will leave tangentially
to the surface of the rest plate. This position is illustrated in Fig. 1 and is
maintained by the guides n sliding upon the rods which carries the belt fork g g³,
or upon any other conveniently arranged guiding rail. The fork 9 g embraces the
belt on the entering rim and is movable together with the rest plate b, the latter
sliding within the body of the pulley a and being provided along its outer edge
with the flange or projecting pins with rollers thereon (Fig. 4) in place of said
flange. The rest plate and fork are moved by the lever pivoted on the pillar
bearing m and having slots for engagement of bolts or pins & fastened respectively
to the guiden and to the bar s.
with the rest plate is nearer to the fulcrum than the connection of the lever with a
The connection with the guiden, that is to say
the bar s.
The amplitude of movement of the fork is therefore greater than that
of the rest plate so that when the lever is moved to throw the belt on to the
pulley a, the fork g g moves the entering rim of the belt so that it is caught by
the cone a' and is moved up thereby onto the pulley a as the rest plate moves
within the pulley a.
In place of making the rest plate movable it may be stationary. Figs. 5 and 6
are isometrical perspective views in which the rest plate is fixed and the arm u² moves
over the rest plate. The rest plate may be fixed to the cross bar bolted to the
hangers or wall brackets & and carrying the sliding rods to which the belt
fork g g is fixed. The arm u² curved to the face of the rest block is also fixed to 4
said bars and moves with the fork g g' when the bar is moved by the lever h.
It is not essential that the cone a should be made in one piece with the pulley a,
it may be formed on a separate piece connected by hooked bolts and nuts with the
pulley as shown in Figs. 7 and 8. The construction here shown is suitable for use
with fixed rest plates. The method of arranging balls in the surface of the rest 50
plate to reduce the friction with the belt is shown in Figs. 9 to 12. The balls c
project slightly through holes in the plate band are held in their positions by
bearings or socket plates fastened on the under side of the plate. The rest-
plate may also be constructed as or replaced by a framework as illustrated in
Figs. 13 to 15 formed of two flanges braced together and having journals for a 55
series of rollers c' on which the belt rests when out of action.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
1. The combination with a driving pulley a of a rest plate of less radius than
said pulley and a cone a' on said pulley substantially as and for the purpose set
forth.
2. The combination with a driving pulley a of a cone a' thereon and a rest
plate having a flange or equivalent u and adapted to be shifted within said
pulley and withdrawn therefrom substantially as and for the purpose set forth.
3. The combination with a driving pulley a of a cone a' thereon a stationary rest
plate 6 of less radius than said driving pulley and a movable arm u³ substantially
as and for the purpose set forth.
4. The combination with the driving pulley a and a rest plate or construction
adapted to receive the belt from said pulley of antifriction balls c or rollers c¹ on
said rest plate or construction for the purpose set forth.
Dated this 22nd day of July 1891.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicant.