Year: 1897

page_text: 347
I, THEODORE VAN HEEMSTEDE OBELT of 140 Rokin, Amsterdam, in the Kingdom of
Holland. Engineer. do hereby declare the nature of this invention to be as
follows:-
The improvements constituting my present invention relate to the combination of
an electric motor and a mechanical governor for regulating the speed of same, the
object of which is to obtain a steady, even, and continuous motion, the speed of which
may be accurately governed without the shock or vibration which usually obtains when
the speed of such motors is governed electrically, thus rendering my invention
particularly adapted for driving phonographs and like instruments where u stendy
and even motion is a desideratum.
According to one method of carrying my invention into effect, I construct a
suitably wound and preferably disc armature, mounted upon a hollow or partly hollow
shaft, carried horizontally within au approximately U shaped frame, adapted to
stand upon, or be suspended beneath a suitable base plate, adapted to carry a pair of
field magnets, (between which the said armature revolves,) and the necessary terininals
and binding posts for connecting up the source of electrical energy with the bobbins
of the said maguets and brushes of the commutator in the usual way.
The free ends of the said U shaped frame are bolted or otherwise connected to, and
may be pass through the substance of the said field magnets, so as to stand out
horizontally therefrom, one end of the said hollow or partly hollow shaft being borne
in a suitable bearing formed in or connected to the bow portion of the said frame,
while its opposite end is carried in a suitable bearing between or beneath the bobbins
of the field magnets, and the said bearings may be arranged as to constitute, form
part of, or be connected to, the standards of the said frame, or the portions provided
for suspending the same.
Upon the said hollow or partly hollow shaft is fixed a circular dise, to the periphery
of which is connected the one ends of two or more plate springs, the opposite ends of
which are connected to the periphery of a like or other circular disc fixed upon a
sleeve mounted upon the said hollow or partly hollow shaft, and upon each of the
said springs, and centrally of their length, I fix a lead or other knob or weight, and
as the rotation of the said shaft increases in speed the said knobs or weights recede
therefrom by centrifugal force and cause the said springs to bow outwardly, and the
disc and sleeve to which one end of these are connected to slide along the said shaft
and approach the said fixed disc to which their opposite ends are connected, but in
order that the area through which the said knobs or weights rotate, and the conse-
quent speed of the shaft may be regulated to that required, the limit to which the
said sleeve is allowed to so slide is governed by a pair of studs fixed upon a rod
within the said hollow shaft, and extending through slots therein, and against the
said studs the said sleeve would abut or collide, the position of the said studs being
controlled by a set screw, or any suitable equivalent therefor, abutting against a disc
or plate at the disclosed end of the said rod.

page_text: The said shaft may carry a toothed wheel or wheels for conveying motion to other
wheels for doing useful work, but when employed for driving a phonogmph, I prefer
to suspend the said motor beneath the bed plate of the phonograph head, and mount
upon the said shaft a suitable pulley or sheave, and convey motion therefrom by the
meaus of a band or strap to a like pulley or sheeve upon the mandrel or its equivalent
of the phonograph.
The said motor would be provided with a suitable switch for opening and closing
the electric circuit, a suitable break for arresting the progress of saine, and incans for
insulating one part from another wherever necessary.
According to a second method of carrying my invention into effect I employ a
drum or other armnature mounted upon a shalt borne in suitable bearings fixed upon
a base plate, and when employed for driving a phonograph, the said base plate may
be the bottom of the usual wooden case or box upon which the phonograph head is
mounted, suitable means being provided for coupling up the source of electrical
energy employed with the bobbins of the field magnets and the brushes in the usual
way, and for operating the switch for opening and closing the circuit.
For regulating the speed of the motor I employ the same form of governor as in
tbe previous arrangement but constructed and placed as follows.
I provide a similar hollow or partly hollow shaft which I mount vertically in
suitable bearings, the said vertical shaft receiving motion from the shaft of the
motor by the means of a worn and worm wheel, or a pair of worm wheels fixed upon
the said shafts, and upon the said vertical shaft I mount a fixed disc, and a sleeve
carrying a like disc, the said dises having connected to their peripheries plato
springs carrying knobs or weights as described in the previous method, the extent of
operation of the said sleeve being governed by studs upon a rod within the said
hollow shaft extending through slots therein in like manner, the said rod being
operated upon by a set screw or its equivalent engaging with a disc upon the said rod
as previously described, and assuming that the said motor is employed for driving a
phonograph, the said set screw or its equivalent, the switch for opening and closing
the electric circuit, and the brake for arresting the progress of the motor, may all be
so arranged as to be operated from the phonograph head, while a pulley or sheave
upon the motor shaft may impart motion to a pulley or sheave upon the phonograph
mandrel or its equivalent by the means of a strap, band or cord as in the first
described arrangement..
It is obvious that by a slight modification of the motor in the first described
arrangement, the method of mounting the governor described in the second
arrangement, may be employed in connection therewith, and I may find it convenient
to employ such or any other desired combination of the two methods described,
without departing from the principle of my invention.
Improvements in and relating to Electric Motors.
I, THEODORE VAN HEEMSTEDE OBELT of 140 Rokin, Amsterdam in the Kingdom of 45
Holland, Engineer, do hereby declare the nature of this invention and in what mauner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
The improvements constituting my present invention relate to the combination of
an Electric motor and a mechanical governor for regulating the speed of same, the 50
object of which is to obtain a steady, even, and continuous motion, the speed of which

page_text: inay be accurately governed or arrested without the shock or vibration that usually
obtains when the speed of such motors is governed electrically, thus rendering my
invention a combination particularly adapted for driving and regulating, and assisting
the speed of phonographs and like instruments, where u steady or even motion is n
desideratum.
For the purpose of rendering the following explanation of my invention perfectly
clear, have hereunto appended two sheets of drawings, in which I have chosen to
shew the combination constituting my invention as applied for driving a phonograph.
Figs 1, 2 and 3 Sheot 1, are side elevation, under plan, aud end elevation.
respectively, of a phonograph, and an electric motor having a disc arinature, and
constructed and arranged to operate in combination with my improved mechanical
governor according to iny invention.
Fig 4 is an enlarged detached view of the form of switch I prefer to employ in
connection with the said motor.
Fig 5 is an enlarged sectional part view of the partly hollow shaft hereinafter
explained.
Fig 6 Sheet 2 is a side elevation of an electric motor having a drum armature, and
with which my improved governor is arranged in a vertical position.
Fig 7 is a sectional plan view of Fig 6 taken upon the line A B.
Referring to Figs 1 to , Sheet 1, which illustrates one method of carrying my
invention into effect as adapted to a phonograph, I construct a suitably wound disc-
arture A, mounted upon a hollow or partly hollow shaft B, carried horizontally
within a box or case C, (having a covering plate D supporting a phonograph E) upon
an approximately U shaped frame F, adapted to stand upon the bottom of the case A,
or be suspended beneath the plate D, or both, by the means of standards or legs a al
the latter adapted to carry the field magnets G, suitable means being provided for
mounting the necessary terminals and binding posts c, for connecting up the lead
wires d, to the bobbins H. H of the field magnets, and the brushes b, ¹ of the
commutator e in the usual way.
The free ends of l' are boltel or otherwise connected to, and may be passed through
the substance of, and insulated from the field magnets G, so that the bowed portion
stands out horizontally thereupon, one end of the said shaft B being borne in a
bearing f, formed in or connected to the said frame F, while its opposite end is carried
in a suitable bearing g between the bobbins H, H¹.
Upon the said shaft B, between e and f, is fixed a circular disc J, to the periphery
of which is rivetted or otherwise fixed the one ends of two or more (preferably four)
plate springs h, the opposite ends of which are fixed in like manner to a similar
disc J, fixed upon a sleeve K, mounted upon the shaft B, and upon each of the said
springs, centrally of their length, is fixed a lead or other knob or weight j, and as the
rotation of the Baid shaft B increases in speed, the said weights would recede there-
from by the action of centrifugal force, and cause the springs h to bow outwardly,
and the disc j and the sleeve upon which it is fixed to slide along the shaft B towards
the fixed disc J, as indicated by lotted outline in Fig 1, but in or ler that the extent
of such bowing of h, and the extent of the area through which the weights h rotate,
and the consequent speed of the shaft B, may not be excessive, but be regulated to
that required or most suitable, the limit to which the said sleeve K is allowed to slide
in the direction of the arrow Figs 1 to 5, is governed by a pair of studs k, k¹ fixed
upon a rod L within the shaft B, the said studs extending outwardly from L, through
a slot m in B, and against these the said sleeve would abut as the speed of B increases,
aud would push them and the rod L in the direction of the arrow in Figs 1 and 5,
but in order that the distance to which the said rod is so pushed, and the consequent
rate of speed of the shaft. B, may be under perfect control I fix upon the exposed end
of 1. a circular disc n, against which abuts the end of a thumb screw o, carried in an
arm M, fixed between the bobbins H, H', the tightening or loosening of which
regulates the distance to which the rod 1. may be pushed, and consequently the rate
of speed of the shaft B and the armature thereon, indeed the screw o may be so
tightened that the studs k, k¹, may impinge upon the end of the sleove K sufficiently

page_text: to stop the rotation of the shaft B, or in other words operate as a brake for the motor,
which may be applied so gradually, and by such infinitesimal movements of the
screw o, as to entirely obvinte the slightest jar or vibration. The general construction
of the rod Land its studs k, extending through a slot in the partly hollowed
shaft B, will be fully understood by reference to the enlarged sectional view Fig 5.
The shaft B may carry a toothed wheel or wheels for conveying motion to other
wheels for doing useful work, but when employed for driving a phonograph, as
illustrated, I prefer to mount upon the said shaft a suitable pulley or sheave N, and
convey motion therefrom by the means of a band, strap, or cord N¹, passing through
a slot in the plate D, to a like pulley or sheave N, upon the mandrel or other part
of the phonograph, as shewn.
The said motor may be provided with any form of switch for opening and closing
the electric circuit, but for the purposes of a phonograph I prefer to use a pair of
plate springs, such as p, p, connected to a block 72 of vulcanite or other nonconductive
material, fixed upon the under surface of the plate B, the said plates p p' being
within the circuit and adapted to be electrically connected by a button p³, operated
by a handle p, upon the upper surface of the plate D. The general construction of
this switch is shewn at Fig 4, the same being shown in position in Figs 1, 2
and 3.
According to a second method of carrying my invention into effect as illustrated by
Figs 6 and 7 Sheet 2, which also shews its application to a phonograph, I provide a
motor having a drum armature A, mounted upon a solid shaft B¹, carried in suitable
bearings P. P, fixed upon the botton or base of the phonograph case C, surmounted by
a metallic plate D, aud for regulating the speed of the said motor I employ the same
form of governor as in the previous arrangement but constructed and placed as
follows.
I provide a similar partly bollow shaft B, which I mount vertically, the lower end
of which is borne in a step R (which may conveniently be formed integrally with the
bearing P) while its upper end is borne by a bearing R¹, carrying the free end
of the rod L, the said shaft B, receiving motion from the motor shaft B' by the
means of a worm or worm wheel S upon the latter, gearing with a worm or worm
wheel upon the former, and upon the shaft B 1 mount the fixed disc J, and the
sleeve K, carrying the disc J, the said dises being connected by weighted spring
plates as previously described, the extent of the sliding of the said sleeve being
governed by the studs k, k upon the rod L, extending through a slot or slots in the
shaft B in like manner, the extent of the sliding movements of L (and consequently K)
being governed by the screw o impinging upon the disc n upon L as before described,
the said screw o in this arrangement passing through the plate D as shewn in Fig 6.
In this arrangement the shaft B carries a pulley or sheave T', the band or strap T¹
which passes upwardly through a slot in the plate 1) and engages with the pulley
or sheave N2 of the phonograph, as in the previous arrangement. A similar switch
to that shown in Fig 4, is mounted upon the yoke of the field magnets G, the button
of which p³ is adapted to be operated by a rod passing upwardly through the crown
plate D, and provided with a milled head 8 by which it may be rotated and the
inanner of operating the said governor and brake being the same as that previously
described, need not be repeated.
It is obvious that by a slight modification of the motor shaft in the first described
arrangements, the method of mounting the governor described in the second
arrangement may be employed in connection therewith, and I may find it convenient
to employ such or any other described combination of the two methods described
without departing from the principle involved.
Having now particularly described and ascertained the nature of my said
invention and in what mauuer the same is to be performed I declare that what
I claim is
1st. The combination of an electric motor and a mechanical governor for regulating
the crowd of and anaruting as a brake for the cuid santan und the

page_text: said combination for driving phonographs and like instruinents, substantially no
herein set forth and shewn.
2nd. In combination, an electric motor having a partly hollow main shaft such as B,
adapted to receive a sliding rod such as L, having studs such as kk, passing through
a slot in B, and adapted to collide with a sliding sleeve K upon B carrying a disc J,
connected by weighted spring plates h, to a like disc J, fixed upon B, the said rod L
carrying a disc n, with which engages a thumb screw o, the whole connected
combined and operating substantially as and for the purposes herein described and
shewn by Figs 1 2, 3, 4 and 5 of the accompanying drawings.
3rd. In combination, an electric motor having a solid shaft such as B', carrying a
worm or worm wheel S, in gear with a worin or worm wheel S¹, upon a partly hollow
shaft B, mounted vertically in bearings R and R', the said shaft B being arranged to
receive a sliding rod I, with studs k, kpassing through a slot in B, and adapted to
collide with a sliding sleeve K, upon B carrying a disc 3, connected by weighted
spring plates h, to a like disc J fixed upon B, the said rod L carrying a disc with
which engages a thumb screw o, the whole connected combined and operating
substantially a8 and for the purposes herein described and shewn by the
accompanying drawings, more particularly by Figs 6 and 7.
Dated the 1st day of December 1907
GEO. THOS. HYDE,
No. 1, Broad Street Buildings, Liverpool Street, E.C.,
Agent for the Applicant.
GEO. THOS. HYDE,
No. 1, Broad Street Buildings, Liverpool Street, E.C.,
Agent for the Applicant.