Improvements in Transmission Dynamometers or Torque Indicators.
Year: 1899

page_text: Date of Application, 31st Aug., 1899
Camoints Cannifontion I aft 30th Mov 1000 Accented 15th Aug. 1560
PROVISIONAL SPECIFICATION.
Improvements in Transmission Dynamometers or Torque Indicators.
ALFRED MARK MORGAN, Braeside, The Avenue, Bockenham, Kent, Engineer,
do hereby declare the nature of this invention to be as follows:-
It is
Improvements in transmission dynamometers or torque indicators.
essentially an indicator showing the actual twisting force with which a driven
machine, engine or any description of plant or plants is itself set in motion. In
principle it consists of a light, sliding, loose collar moving over the main driving
shaft of the plant, whose position along the said shaft indicates the amount of
twisting moment on the driven shaft. To the end of each of the two shafts, the
driving and driven, is attached a suitable headpiece or boss with suitable pro-
jections or spokes to each of which is attached the end of a spring S so that the
corresponding arms of the two headpieces are attached to one another through
the medium of the said suitable spring.
These arms will be drawn further apart or close up according as spring con-
tracts or expands under a greater or less load upon the plant. The invention
describes suitable expansive mechanism which causes the collar C to move in
accordance with the variations of load manifested by the alteration of the springs'
lengths, or which is the same thing the distance apart of the two arms of the
two headpieces.
In Fig. 1 is shown the employment of the expanding link work L the two
free ends E being attached each to an arm of the two bosses so that as the con-
necting springs are extended or contracted so the ends E are brought closer
together or further apart and so the whole linkwork contracts or expands in
length, and collar C is moved accordingly along the shaft.
In Fig. 2 is shown another means of obtaining a stroke on C according to the
The stiff wire cord T turns
torque on the spring which here connects pins P.
the drum D, which contains a coil clock spring to keep wire T taut, this turns
bevelled mitre wheels W which through other suitable gear wheels draws in or
out the ratchet R which is connected to collar C. The cord T may be a ratchet
acting on a suitable wheel.
A central wormshaft may be employed to act upon C the turning of which is
effected by means of a ratchet and toothed-wheel.
It must be understood that the nature of these mechanisms, especially that in
Fig. 2, may vary greatly but will always be of the nature and purpose of those
described. A series of cams or wedges may replace the links of Fig. 1.
Reading: The "exact" position of C may be readily and accurately observed by
any such arrangement of levers, index and dial or scale to multify the stroke as
I have shown in Fig. 3, a very open" scale of readings is obtainable. In Fig. 3
I have an over-collar on C which has a piu Q which fits in slot X of index I,
this collar is kept from rotating with C by guide rod G and small roller N.
In the other arrangement I have a rib M on collar C which fits between rollers N
and causes sliding index J to move along guide G. The scale may be read by a

page_text: sharp clear mark or projection on C reading against a horizontal straight scale
held close to it.
I hereby declare that I am the inventor of the above described sliding-collar
principle and direct driven principle in transmission dynamometers and declare
the same to be the cheapest, strongest, most accurate, and most compact and
universally useful and applicable dynamometer. It may be used with suitable
cleat or belt gear as an absorption-dynamometer. Is best form of flexible shaft-
ing, with links in place of springs and other suitable modifications.
Dated this 31st day of August 1899
Improvements in Transmission Dynamometers or Torque Indicators.
ALFRED MARK MORGAN, Braeside, The Avenue, Beckenham, Kent, Engineer,
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:-
"
Consists in means whereby I indicate and show clearly what is the torque,
twisting moment or driving effect with which one shaft is driven by another.
The two shafts which meet one another (the one preferably running within the
other to reduce the distance apart of the bearings) are connected to one another
by any suitable arrangement of springs or single spring of any suitable form,
the amount of extension or contraction of which is shown by the change of
position" of a sliding collar, sleeve or such part of mechanism of a like kind,
which moves along one of the shafts. I use suitable linkwork or preferably spur
gearing or the like mechanism whereby this motion is produced in accordance
with the turn of one shaft from the other, which is caused by the torque,
causing extension or contraction of springs. Means are further described by
means of which the exact position of said collar is clearly rendered and illustrated
by suitable index, and open scale of readings. By proper callibration of instru-
ment I can therefore show with what effect the machinery, plant, or engines are
being driven at any instant.
27
Refering to drawings, the drum or box 1 of shaft 1 is suitably attached to
the inner boss, of which Qin Fig. 2 is the disc or cover, of shaft A by a coil or
powerful clock spring X in Fig. 2 or other spring device. The drum D has any
number of bosses B containing suitable screw mechanism fully described below
in Fig. 2 whereby the sliding collar E is caused to move along shaft F in accord-
ance with the change of relative position" of the two shafts. By recording the
position of E I indicate the twisting moment transmitted by driving to driven
shaft. C is a loose outer collar on E having two suitable horns or projections.
The one having a roller or the like device T whereby outer collar C is kept from
revolving by travelling in guide G. The other or opposite horn is attached to
cord or chain S which is suitably attached to the index pointer of indicator I
and moves same over the scale on face of indicator, a hair spring within which
keeps cord S always taut. Cord S may work against a weight instead of internal
spring, and by means of pulleys it may be led away to any convenient position
of indicator. The above described recording mechanism may be on opposite
hand of shafts A, F.
In Fig. 2 I have shown detail of boss B. To Q which is part of boss attached to
shaft I fit a spur wheel or circular ratchet R, which may or may not be com-
plete according as required. Within boss B is a revolving barrel H to which I

page_text: attach or key as at k a suitable pinion or the like gear wheel P which engages
with ratchet R. The barrel H is screw threaded within, into this engages the
threaded spindle V which (see Fig. 1) is attached to collar E. As the two shafts
change position the ratchet k causes barrel H to revolve, which has the effect of
moving spindle V backwards or forwards.
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 means of indicating the twisting moment exerted by one shaft in driving
another by the position of a sliding collar on one or the other of the two
shafts.
(2.) Suitable mechansm whereby the said collar is caused to move in accordance
with said twisting moment or effect.
(3.) Suitable mechanism whereby the exact position of said collar can at once
be clearly interpreted.
(4.) The driving and driven shafts telescoping or running into one another, the
one being hollow for said purpose, to reduce the distance apart of bearings.
TAJ
11000
A. M. MORGAN.