Year: 1899

page_text: We, EDWARD DuBois, Instrument Maker, and THE MUTUAL ELECTRIC TRUST
LIMITED, both of 111, Gloucester Road, Brighton, in the County of Sussex, do
hereby declare the nature of this invention to be as follows:-
Our invention relates to gear changing mechanism by means of which certain
advantages are obtained.
Our invention although primarily intended for use in connection with electric
and other meters is applicable also to other cases in which the ratio between two
gear wheels has to be changed.
In order that this invention may be more readily understood we have appended
hereto a diagram illustrative thereof in which 1 represents a plate on the other
side of which is mounted the counting mechanism of an electric meter and it is
assumed that to suit different purposes wheels 2 and 3 may have to be altered at
will. To enable one or both of said wheels to be changed rapidly and without
interfering with the ordinary integrating mechanism we employ the device here-
inafter to be described.
The said device consists of an intermediate wheel 4 mounted on the curved
arm 5 having a curved slot 6 therein. By means of a screw 7 the position of
said arm can be adjusted upon plate S as will be hereinafter described.
Let it be assumed that wheels 2 and 3 are attached to their arbors simply by
being thrust thereon, the bite thus obtained being sufficient for practical pur-
poses. This method of attaching wheels upon arbors is well known. Assume
now that we desire to replace wheels 2 and 3 by other wheels of different size.
All that we have to do is to loosen screw 7 by means of a turn screw, pull
wheels 2 and 3 off their arbors, thrust upon said arbors the wheels to be sub-
stituted and then move wheel 4 into such position that it gears with said sub-
stituted wheels and then tighten screw 7 so as to bind arm 5 upon plate 8.
It will be seen that by means of our invention a very simple and rapid means
is provided for changing the gear for any desired purpose.
We desire it to be understood that we do not limit ourselves to the precise
shape of the arm 5 or of its slot.
3 "
1000

page_text: We, EDWARD DuBois, Instrument Maker, and THE MUTUAL ELECTRIC TRUST
LIMITED, both of 111, Gloucester Road, Brighton, in the County of Sussex, 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 follow-
ing statement:-
Our invention relates to gear changing mechanism by means of which certain
advantages are obtained.
Our invention although primarily intended for use in connection with electric
and other meters is applicable also to other cases in which the ratio between two
gear wheels has to be changed.
In order that this invention may be more readily understood we shall refer to
the drawings left with the Provisional Specification, in which I represents a plate
on the other side of which is mounted the counting mechanism of an electric
meter and it is assumed that to suit different purposes wheels 2 and 3 may have
to be altered at will. To enable one or both of said wheels to be changed rapidly
and without interfering with the ordinary integrating mechanism we employ
the device hereinafter to be described.
The said device consists of an intermediate wheel 4 mounted on the curved
arm 5 having a curved slot 6 therein. By means of a screw 7 the position of
said arm can be adjusted upon plate 8 as will be hereinafter described.
Let it be assumed that wheels 2 and 3 are attached to their arbors simply by
being thrust thereon, the bite thus obtained being sufficient for practical pur-
poses. This method of attaching wheels upon arbors is well known. Assume
now that we desire to replace wheels 2 and 3 by other wheels of different size.
All that we have to do is to loosen screw 7 by means of a turnscrew, pull
wheels 2 and 3 off their arbors, thrust upon said. arbors the wheels to be sub-
stituted and then move wheel 4 into such position that it gears with said sub-
stituted wheels and then tighten serew so as to bind arm 5 upon plate 8.
It will be seen that by means of our invention a very simple and rapid means
is provided for changing the gear for any desired purpose.
We desire it to be understood that we do not limit ourselves to the precise
shape of the arm 5 or of its slot.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:
1. In gear changing mechanism, the combination of a curved slotted arm, an
intermediate wheel mounted thereon and means for binding the said slotted arm
in position substantially as set forth.
2. The arrangement and combination of parts substantially as and for the
purpose set forth.