TRANSMITTING MOTION TO SPEED INDICATORS
Year: 1884

page_text: I JAMES MURDOCH NAPIER of York Road Lambeth in the County of Surrey
Engineer do hereby declare the nature of
my
invention for "IMPROVEMENTS IN
to be as follows:-
TRANSMITTING MOTION TO SPEED INDICATORS
My improvements refer more especially to the transmitting of motion to speed
indicators which are attached to locomotives or their tenders, to guards vans,
railway carriages and generally to railway rolling stock and to vehicles where a
frictional engagement against an axle or other suitable rotating part is used and
consists in the employment in combination with a friction wheel or roller of
a coiled wire connection such as is sometimes used for drilling and other purposes
guided in a flexible sheath or tube lined with a wire coil. I also use to guide the
coiled wire driving connection rigid metal tubes bent and directed to suit the
situation. Or the coiled wire driving connection may be guided partly in a flexible
and partly in a rigid tube. This coiled wire connection I employ when convenient
direct from the spindle or axis of the friction wheel or roller following if necessary
a tortuous course in which the turnings are not too abrupt to the speed indicator
or if not convenient so to do'I use it in combination with toothed gearing chain
gearing or pullies and bands or cords arranged to suit the circumstances attending
the relative positions of the speed indicator and the axle or rotating part from
which motion is to be imported.

page_text: .
I JAMES MURDOCH NAPIER of York Road Lambeth in the County of Surrey
Engineer do hereby declare the nature of my invention for "IMPROVEMENTS IN
TRANSMITTING MOTION TO SPEED INDICATORS" and in what manner the same is to
be performed to be particularly described and ascertained in and by the following
statement:
My improvements refer more especially to the transmitting of motion to speed
indicators which are attached to locomotives or their tenders to guards vans
railway carriages and generally to railway rolling stock and to vehicles where a
frictional engagement against an axle or other suitable rotating part is used and
consists in the employment in combination with a friction wheel or roller of
a coiled wire connection such as is sometimes used for drilling and other purposes
guided in a flexible sheath or tube lined with a wire coil. I also use to guide the
coiled wire driving connection rigid metal tubes bent and directed to suit the
situation. Or the coiled wire driving connection may be guided partly in a flexible
and partly in a rigid tube. This coiled wire connection I employ when convenient.
direct from the spindle or axis of the friction wheel or roller following if necessary
a tortuous course in which the turnings are not too abrupt to the speed indicator or
if not convenient so to do I use it in combination with toothed gearing chain
gearing or pullies and bands or cords arranged to suit the circumstances attending
the relative positions of the speed indicator and the axle or rotating part from
which motion is to be imported.
DESCRIPTION OF DRAWINGS.
Figures 1. 2. 3 and 4 illustrate my invention.
:
E
In Figures 1 and 2 A represents an axle which communicates motion. to:
friction wheel or roller B which is kept in contact with the axle A by a spring C
attached to the end of a swing frame D which vibrates on its axis at E and is
supported by a, fixed bracket F. The friction wheel or roller B is fixed on
spindle a which runs in bearings in the swing frame D. To the end of spindle a
at bis attached the coiled wire connection c enclosed in the flexible sheath or tube
cover & which is attached to the swing frame D ate by a socket piece f. The
bracket is shown supporting a continuation of the coiled wire connection and
flexible tube cover and shows a junction of the flexible tube d with a rigid or
comparatively rigid tube d¹ which may be employed when the elastic covering
tube is not required. The motion transmitted to the friction wheel or roller B by
the axle A is thus communicated to the coiled wire connection by it or by it in
combination or conjunction with any other necessary or convenient means to the
speed-indicator.
In Figures 3 and 4 the coiled wire connection is shewn attached to the end of
spindle E which is driven through toothed wheels G and H-In this arrangement
the non-flexible covering tube d¹ may be used as indicated.

page_text: 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). In apparatus for transmitting motion to speed indicators, the combination
of a wheel or roller in frictional engagement against an axle or other revolving
part, a coiled wire connection, and a flexible tubular guiding sheath substantially
as described.
:
(2). In apparatus for transmitting motion to speed indicators, the combination
of a wheel or roller in frictional engagement against an axle or other revolving part,
a coiled wire connection within a curved metal tube substantially as described.
(3). The combination of apparatus for transmitting motion to speed indicators
substantially as described and represented by the annexed drawings.
Date :
CARPMAEL & Co.,
Agents for the Applicant.