Improvements in and relating to Phonographs.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Phonographs.
I, THEODORE VAN HEEMSTEDE OBELT of 140 Rokin, Amsterdam, in the Kingdom
ef Holland, Engineer, do hereby declare the nature of this invention to be as
follows:-
The improvements in Phonographs constituting my present invention relates
to that portion technically known as the Phonograph head, or in other words that
portion which pertains to the mandrel or holder for the way or other cylinder, upon
and from which sound-wave vibrations are recorded, and reproduced, and to the
mechanism for operating the rotation of the mandrel or holder, and the movements
of the recording and reproducing diaphragms and their connections, but not to the
motor or other motive power by the means of which motion is imparted to the said
mechanism.
The first portion of my invention relates to improvements in the general con-
struction of a phonograph head, and in carrying such improvements into effect, I
provide of any kind of wood a preferably rectangular case or box, upon which I
mount and fix a metallic plate, carrying a suitable metallic or other frame so con-
structed as to form a bearing for one end of a suitably shaped mandrel, adapted to
carry the usual wax or other cylinder upon which sound records have been or are to
be made, the opposite end of the said mandrel being carried in a bearing formed in
a suitable standard hinged or otherwise pivotally connected to the said frame, so as
to be easily manipulated for permitting the said cylinder to be placed upon and
removed from the said mandrel at will.
The said mandrel carries a suitable pulley, connected by a band, cord or other-
wise to a clockwork, electric or other motor contained within the said case or box,
which imparts motion, at a governed speed, to the said mandrel.
The said frame also carries in suitable bearings a hollow fixed shaft, parallel with
the said mandrel, in which revolves a threaded shaft, receiving motion from a
suitable set of wheels, contained within a standard fixed upon or forming part of
the said frame, and operated by and from a wheel upon one end of the said
mandrel.
Upon the before mentioned hollow shaft is mounted a loose sleeve, so constructed
and arranged as to form or receive a carrier for the recording and reproducing
diaphragms the said carrier being also provided with a tubular extension for the
attachment of a resonator or the conveying end of a pair or several pairs of the usual
hearing tubes. The said carrier has a projecting arm extending across the said
frame to a suitable guide, which serves for steadying the said carrier when sliding
along the said hollow shaft. The said carrier is also provided with a pivotted lever
or arm one end of which is adapted to form a finger hold for operating the same,
while the opposite end carries a half or part nut having an internal thread of the
same pitch as that of the before mentioned threaded shaft, which, when the said
finger hold is raised makes contact with the said rotating threaded shaft (through an
opening formed in the said hollow shaft) by the tension of a spring, and causes the

page_text: said carrier to slide along the said hollow shaft, the before mentioned gearing being
so arranged that the speed of rotation of the threaded shaft is such as to cause the
said carrier to travel at such a rate that the stylus of the speaker or reproducing
diaphragm is always in the groove of the record, upon the cylinder, which said
record may or may not, but preferably would, have been made by a recording
diaphragm mounted upon the said carrier. The lowering of the finger hold of the
before mentioned arm or lever when the tracing of the record is completed, or when
the stylus of the reproducing diaphragm has reached the end of the said record,
would raise the said half or part nut out of contact with the threaded shaft, and the
said stylus out of contact with the cylinder aided by the before mentioned spring
so that the carrier may then be slid idly along the said hollow shaft into its first
position at the starting end, ready for again operating in like manner.
The second portion of my invention also relates to improvements in the general
construction of a phonograph head, and consists of certain modifications of the
foregoing arrangements. For the purposes of this portion of my invention I
dispense with the before mentioned hollow shaft and the carrier which slides thereon,
and so arrange the before mentioned frame as to carry centrally of its width or
thereabouts the before mentioned threaded shaft, which, by the means of suitable
gearing receives motion at the desired speed, by and from the said mandrel. At
each side of the said threaded shaft the said frame carries a pair of fixed rods,
parallel with the said shaft and mandrel, and upon these slide a skeleton carriage,
provided with a pivotted arm or lever, one end of which is constructed to form a
hand or finger hold, while its opposite end is so bent or curved as to extend beneath
and partly around and over the said mandrel and the wax or other cylinder when
mounted thereon, and terminating at a point above these, whereat it is so formed
as to receive and hold by a catch or other suitable means a recording or repro-
ducing diaphragm.
The said arm or lever carries a half or part nut or nuts having internal threads
of the same pitch as that of the said threaded shaft, these being in such a position,
that when the finger or hand hold of the said arm or lever is depressed into its
lowest position, they make contact with the said shaft, and the said carriage is
thereby carried along its supporting rods, and at the same lowering of the said
hand or finger hold the stylus of the diaphragm is placed in contact with the
cylinder, either for recording thereon or producing therefrom, and by an opposite
or upward movement of the said hand or finger hold the said half or part nut or
nuts would be lifted out of contact with the rotating threaded shaft, and the stylus
of the diaphragm out of contact with the cylinder, when the said carriage may be
slid idly along the before mentioned supporting rods to its first or normal position,
carrying with it the said arm or lever and the diaphragm. A suitable spring or
springs may be employed for retaining the said arm or lever in either or both its
active and inactive positions.
The third portion of my invention relates to improvements in the before men-
tioned mandrel and the mounting of same. For the purposes of this portion of
my invention I provide a shaft or spindle, one end only of which is borne by and
upon a pair of standards or uprights upon the before mentioned plate, and between
these the said shaft or spindle carries a suitable pulley or sheave connected by a
band, cord or otherwise with the source of motion in the said case or box, suitable
means being provided in the said standards or uprights for the reception of steel
balls upon which the said shaft or spindle may be borne and rotate. The said shaft
or spindle may also carry a wheel for imparting motion to the gear for operating
the rotation of the threaded shaft in either of the foregoing arrangements of a phono
graph head. The free end of the said shaft or spindle may be tapered or extended
in diameter or carry a thin wood, metal or other case so tapered, upon which may be
mounted a second casing of the same or other light material, the latter being for
the reception of the before mentioned cylinder, and may be either tapered or coned
or perfectly parallel upon its outer surface as may be best suited for the reception
of the said cylinder, and I may find it convenient to provide upon the said "outer

page_text: casing a spiral winding of tape, cloth or other fabric, or rubber or other resilient
material, as a bite for the said cylinder.
By the foregoing method of constructing and mounting the said mandrel, I am
enabled to dispense with a removable bearing for the outer or free end of same,
thereby providing facilities for quickly placing the cylinder thereon and removing
the same therefrom.
The fourth portion of my invention relates to improvements in mandrels and
cylinders therefor and means for retaining the latter upon the former.
For the purposes of this portion of my invention, I provide a shaft or spindle
mounted at one end only in suitable bearings as in the last previous arrangement,
and upon the free end of this I mount, and fix near to the said bearings a circular
dise of wood vulcanite or other light material of slightless less diameter than the
internal measurement of the cylinder to be mounted thereon, and abutting against
the said disc I mount upon the said shaft or spindle a ring or disc of rubber or
rubber composition, and following this I provide a sleeve or cylinder of wood or
vulcanite or other light material and another disc or ring of rubber or the like, and
abutting against the latter a broad ring of wood, vulcanite or other light material
followed by metal or other washer, and upon the extremity of the free end of the
said shaft or spindle I form a screw thread which receives a fly or other nut.
In this arrangement, I prefer to employ for recording and reproducing sound
vibrations a cylinder of suitable metal, formed parallel upon both its inner and
outer surfaces, the internal diameter of which would be such as to permit this to
be easily slid upon the said accessories
fixed disc, which engages with a slot or
ting against a pin or stud upon the sa upon the said shaft or spindle, finally abut-
notch in the end of the said cylinder, and when the said cylinder is in position
upon the mandrel, the tightening of the said fly nut would exert a pressure upon the
said rubber or rubber composition rings, and by thus narrowing the thickness of
these their diameters would expand and abut against the inner surface of the said
metallic cylinder, and so hold and retain this in position, but when the pressure
upon the said resilient rings was removed by the loosening of the said fly nut, these
would immediately contract and their diameter be lessened when the cylinder may
be easily removed.
י
. T
1907
GEO. THOS. HYDE,
1 Broad Street Bldgs., London, E.C., Agent for the Applicant.
Improvements in and relating to Pnonograpns.
I, THEODORE VAN HEEMSTEDE OBELT of 140 Rokin, Amsterdam in the Kingdom
of Holland, 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 following statement:-
My present invention relates to improvements in that portion or portions of a
phonograph, technically known as the "Head," or in other words that portion which
pertains to the mandrel or holder for the wax or other cylinder, upon, and from
which sound wave vibrations are recorded and reproduced, and to the mechanism
for conveying motion from the motor for rotating the said mandrel, and from this
to the recording and reproducing diaphragms and their connections, but not to the
motor or other motive power by means of which motion is first imparted to the said
mandrel and the other mechanism, the object of my said invention being, that by

page_text: the simplification of the several parts hereinafter described and shewn, to materi-
ally reduce the initial cost of production of the entire machine without the slightest
deterioration in the efficiency of the whole as compared with such machines hitherto
produced.
The improvements constituting my said invention consist Firstly, of improve-
ments in the general construction of a phonograph head, Secondly of improvements
in mandrels for carrying the wax or other cylinder upon and from which sound
wave vibrations may be recorded and reproduced.
In order that my invention and the several parts constituting the same, and the
manner of their operation, may be clearly understood, I have hereunto appended
three sheets of drawings, of which.
Figs 1 and 2, Sheet 1 are side elevation and plan respectively of a phonograph
according to one method of constructing and arranging the head thereof, Figs 3
and 4 being end elevations of the same, as viewed from right to left and left to
right respectively of Fig 1.
Fig 5 is a section taken upon the line A B of Fig 1.
Fig 6 is an enlarged view (partly in section) of a portion of Fig 5, while Figs 7
and 8 are still further enlarged views of a portion of Fig 6.
Fig 9 and 10, Sheet 2 are elevations similar to Figs 1 and 2, but illustrating an
alternative method of constructing a phonograph head according to my invention.
Figs 11 and 12 are end elevations of Fig 1, as viewed from right to left and left
to right respectively.
Figs 13 and 14 are enlarged views of a portion of the details of the same, herein-
after explained.
Fig 15 sheet 3 is a longitudinal section of an improved form of mandrel and an
improved method of mounting the same.
Figs 16 and 17 are like sections of a further improvement in the construction
of mandrels, the former illustrating the position of the several parts of same when
receiving the wax or other cylinder, while the latter illustrates the positions of the
said parts, when altered for holding the said cylinder in position thereon.
Fig 18 is a perspective view of a cylinder as adapted for use with the mandrel
illustrated by the two previous views.
Referring to the first portion of my invention as illustrated by Figs 1 to 8
Sheet 1, I provide of any kind of wood, a preferably rectangular box or case A, upon
which I mount and fix a metallic plate B, carrying a suitable metallic or other frame
C arranged at one end C₁ to form a bearing for one end of the spindle a of a tapered
or parallel mandrel D, adapted to carry the usual wax or other cylinder E, upon
which sound records have been or are to be made, the opposite end of the said
spindle a being carried in an adjustable bearing b, connected to a standard C³, hinged
or otherwise pivotally connected at points c, c¹ to the frame C, the said standard C
being secured in its vertical position by the means of any form of spring catch d,
suitable for permitting the said standard to be easily lowered and raised for
removing and replacing the cylinders E upon the mandrel D.
The said mandrel D carries a pulley F connected by a band, strap, or cord, such
as e, or by other suitable mechanism, to the high speed' shaft f of a clock-work,
electric, or other motor contained within the case or box A, which thereby imparts
motion at a governed speed to the said mandrel D.
The said frame C, also carries a fixed hollow shaft G, having for the major portion
of its length a slot or opening in its side facing the mandrel D, and within the said
shaft, and borne in suitable bearings g g connected to or formed integrally with
the standards C and C, revolves a threaded steel-shaft, which receives motion from
a suitable set of toothed-wheels mounted and revolving upon studs contained within
the hollow standards C, and enclosed by a covering plate C3, the said wheels being
in gear with, and receive motion from a pinion fixed upon the end of the mandrel
shaft a, the said train of wheels being arranged in any suitable manner by means
of which the said threaded shaft H may revolve at the desired speed, relatively

page_text: to the mandrel D, an example of such a set of wheels being shewn by dotted outline
at xxx in Fig 4.
Upon the said hollow shaft G is mounted a loose hollow sleeve J, in fixed con-
nection with a carrier H¹, so constructed as to carry pivotally a hollow tubular
portion Ja, adapted to move within a radius indicated by full and dotted outline
at Fig 6, and upon this is mounted the arm of the recording and reproducing dia-
phragms, one of which is shewn by J3, (Figs 1, 2, 3, 4 and 5) the said carrier having
also a short hollow tube J4, in communication with J2, and adapted to carry a reso-
nator or hearing-tube J1, (Fig 3) or the converging ends of a pair of hearing tubes
in the usual way. The said carrier has a projecting arm h, extending across
beneath the mandrel D, the free end of which bifurcated at h¹, (Fig 5) and makes
contact with a web h², upon one side of the frame C, and serves to steady the said
carrier when sliding along the hollow shaft G. The opposite or fixed end of the
said arm his formed substantially as at Figs 7 and 8, and is hollowed out to receive
a threaded half or part nut j, the heel of which j¹, slides in a recess in hand is
provided with a spring 2, the tension of which operates to push out the half or part
nut and cause this to make contact with the threaded staff H. The said carrier
is provided with a lever or arm k, connected to a cam k¹, adapted to partly rotate
upon the sleeve J within the carrier H', the said cam being so formed as to engage
with a recess in the half or part nut j, and when the lever or arm k is placed in
the position shewn by full lines in Fig 6, the said cam serves to push inwardly the
part-nut out of contact with the threaded shaft H, but when the said arm k is
brought into the position shewn by dotted outline in Fig 6 or full lines in Fig 5,
the flat side of the said cam is brought facing the nut j, the spring of which
then forces the threaded face of j into contact with H. The said carrier H has
also a recess in which is placed a pin m, adapted to slide longitudinally therein, one
end of the said pin being in contact with J2, while the other is in contact with the
cam k, the latter being so formed, that when the flat portion thereof is in contact
with the part nut j, and allows this to make contact with the shaft H as previously
stated, the pin m is permitted to fall away from J2 and allow this to take the posi-
tion shewn by dotted outline, (Fig 6) the reverse movement of the said cam serving
to raise the said pin and place J2 in the position shewn by full lines in the same
figure.
The movement of the carrier H', along the hollow shaft G would be the same
whether the diaphragm J³ be recording or reproducing and assuming that a record
has been made upon the cylinder E the manner of operation is as follows:-The
lever & being lowered so as to place the part nut j out of contact with the threaded
shaft H, and the hollow projection J2 (raised by the same movement) so as to
place the stylus of the diaphragm J3 out of contact with the said cylinder (as indi-
cated by dotted outline in Fig 5, the said carrier would be free to slide along the
said hollow shaft G, and may be placed in such a position thereon that the diaphragm
is at the initial end of the record or substantially as at Fig 1 and 2, and if the lever
k be then raised as described, the part nut would be brought in contact with the
threaded shaft H, and the stylus of the diaphragm resting upon the cylinder E,
(Figs 3, 4 and 5) and by then starting the motor, motion would be imparted to the
mandrel D, (and the cylinder G thereon) and to the threaded shaft H, the latter by
reason of its contact with the part nut j causing the carrier H¹, to travel along the
hollow shaft G, and the diaphragm along the cylinder E, the gearing are being
such as to permit these to travel in perfect accord with each other, so that the stylus
of the reproducing diaphragm is always in the groove of the record upon E, which
may be, and preferably would have been made, by a recording diaphragm mounted
upon the same carrier H. When the stylus of the reproducing diaphragm has
reached the end of the record, the lowering of the lever k would again place the
part nut j out of contact with the shaft H, and the stylus out of contact with the
cylinder E, when the carrier may be again passed idly along the shaft G, and
the operation be repeated if desired upon the same or a fresh cylinder.
Referring to the second portion of my invention as illustrated by Figs 9 to 14,

page_text: Sheet 2. In this arrangement I dispense with the before mentioned hollow shaft
G, and the carrier H¹ and its connections, and so arrange the said frame C as to
provide at one end standards nnn2, and at its opposite end standards n³ and n², the
latter and the standard n¹, forming bearings for the threaded shaft H. In this
arrangement the spindle a of the mandrel D is borne at one end by the standards
n and n, and at the opposite end by an upright o, pivotted at a point o¹, which per-
mits o to be removed from this end of a in order that the cylinder E may be placed
upon and removed from the said mandrel. One end of the spindle a extends beyond
the bearing n³ and carries a pulley or grooved wheel p, connected by a cord, band,
strap p', with the high speed shaft f of the motor contained within the case A, or
other suitable gearing may be employed for conveying motion from f to the mandrel
D), and between the said pulley p, and the standard n³, the. said shaft carries a
pinion which gears with a spur wheel mounted upon one end of the threaded
shaft H, and so imparts motion from D to H at the desired rate of speed.
At each side of the shaft H the standards n, n², n³, n, carry a pair of fixed rods K
and K, and upon these slide a skeleton carriage K³, to which is connected an arm
L, pivotally mounted upon the rod K', but adapted to slide thereon with the
carriage K³, the said arm being so constructed at one end as to form a hand or
finger hold L', while its opposite end L2, is so bent or curved as to extend partly
around and over the mandrel D, and the cylinder Ẹ thereon, and terminates at a
point above these, whereat it is so formed as to provide a holder E³, for a recording
or reproducing diaphragm E.
The member L¹ of the lever L carries a half or part nut s, having internal threads
of the same pitch as the shaft H, this being in such a position that when the hand
cr finger hold L¹ is placed in its lowest position as at Fig 13, the said part-nut
makes contact with the said shaft, and the said carriage K³ is thereby carried
along its supporting rods K and K¹, and the said lowering of L', would place the
diaphragm, in contact with the cylinder E, for either recording thereon, or re-
producing therefrom, as shewn in the same figure, and by an opposite or upward
movement of L' the part nut s would be disengaged from H, and the stylus of E'
from contact with E as shewn at Fig 14, when the said carriage may be slid idly
along its rods K and K to the initial end or the beginning of the record upon E.
A suitable spring or springs (not shewn) may be provided (if necessary) for
retaining the hand hole L¹, in both its raised and lowered positions.
I may find it convenient or desirable that instead of forming the member L² of
the lever L in one piece as shewn in Figs 13 and 14, I may, form a hinge or other
joint in this as at Fig 11, so that the stylus may rest upon the cylinder E for record-
ing or reproducing, with only such pressure as that afforded by the combined
weight of the diaphragm and holder E1, E2, and the jointed portion of L² also
provides that the latter may be thrown back out of contact with the cylinder (as
shewn by dotted outline in Fig 11) without the need of altering the position of
the member L¹.
The third portion of my invention, as illustrated. by Fig 15 sheet 3, relates to
improvements in the construction of the before mentioned mandrel and the mount-
ing of same. For the purposes of this portion of my invention I provide a shaft
or spindle a one end only of which is borne by, and revolves in suitable bearings
formed in or mounted upon a pair of standards or uprights M and M', fixed upon
the before mentioned plate B, and between these the said shaft or spindle carries
a suitable pulley or sheave N, connected by a band, strap, or cord N, to, or other-
wise in gear with the high speed shaft of a clockwork or other motor contained in
the box or case upon which the plate B is mounted, and I may provide in the
bearings of M and M', suitable races for the reception of steel balls upon which
the said shaft a may revolve. The said shaft or spindle a has fixed upon its end
outside M, a pinion or lantern wheel P, for imparting motion from the said spindle
to the wheel or wheels or other gear for operating the rotation of the threaded shaft H
in either of the foregoing methods of constructing and arrangeing the phonograph
head.

page_text: The free or opposite end of the said shaft or spindle a may be tapered or extended
in diameter, or arranged to carry a thin wood, vulcanite, bone, aluminium or other
metal case R so tapered, upon which may be mounted a second casing R of the
same or other light material, the outer surface of which may be either parallel or
slightly tapered, and of such diameter, as to conveniently receive the before
mentioned cylinder E, (shewn in dotted outline in Fig 15) and in order to provide
a suitable frictional contact, and prevent slip occurring between E and R¹, I
may find it convenient to provide upon the latter a spiral winding of tape, cloth or
other fabric, or rubber or other resilient material for this purpose.
The fourth portion of my invention, as illustrated by Figs 16, 17 and 18, relates
to improvements in mandrels and cylinders therefor, and means for retaining the
latter upon the former.
According to this part of my invention the spindle a, is mounted upon the
standards M M¹, and is driven by the same means and conveys motion from itself
to the threaded shaft H, in the same manner as that described in relation to Fig 15,
and shewn by Figs 16 and 17, and upon the free end of a, near to the bearing M,
I fix or form integrally therewith a shoulder S, and abutting against this I mount
loosely upon the said shaft a circular disc T, of wood, vulcanite, or other light
material, and abutting against this I mount in like manner a disc or ring V, of
tubber or rubber composition, and following this I provide a sleeve or cylinder T
preferably of the same material as V, and following this a broad ring 12 of wood
or other light material, followed by a metallic or other washer W, and upon the
extreme end of a I provide a suitable screw-thread, which receives a fly or other
nut W, the diameters of the portions T, T1 and T2, and the discs or rings V, V2
being (when in their normal position shewn by Fig 16) slightly less than that of
the cylinder E, so that this may be easily slid thereon as shewn in the same figure.
In this arrangement I prefer to employ a cylinder E, of any soft metal such as
lead, pewter, zinc, or any desired alloy of these, of such density as to permit sound
vibrations to be traced or otherwise recorded thereon, the inner and outer surfaces
of the said cylinder being perfectly parallel, while its internal diameter would be
such as to permit this to be easily slid upon the before mentioned mandrel when
in the condition shewn by Fig 15. In one end of the said cylinder E I provide
pair of notches or recesses w, as shown in Fig 18, which engage with a pair of
pins or projections w₁ formed upon the portion T, of the mandrel, and when the
cylinder is in position upon the mandrel as at Fig 15, the tightening of the said
nut W, would press together the sections of the mandrel and by thus lessening
the thickness of the elastic discs or rings V and V₁, these would expand in width
and abut against the inner surface of the cylinder E, as at Fig 16, and so hold and
retain this in position, the loosening of the nut W being all that is needed to
reduce the width of the rings or discs V and V₁, and permit the removal of the
cylinder E.
By the foregoing methods of constructing and mounting the mandrels illus-
trated by Figs 15 and 16, I am enabled to dispense with a removable bearing for
the outer and free end of the shaft or spindle a, thereby providing facilities for
quickly placing the cylinder thereon and removing the same therefrom.
I may find it convenient, and I reserve to myself the right to employ any desired
combination of the herein described methods and means of constructing phonograph
heads and mandrels therefor, without departing from the principles involved.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
1st. The herein described methods of constructing and arranging the heads of
phonographs and the mandrels therefor, and the means of conveying motion from
the motor employed to the said mandrels and from these to the threaded shafts,
for operating the movements of the recording and reproducing diaphragms, sub-

page_text: stantially as and for the purposes herein set forth and illustrated by the accom-
panying drawings.
2nd. In a phonograph, the combination with a box or case A, containing a suit-
able motor and surmounted by a covering plate B, of a frame such as C, forming
bearings for the spindle of a mandrel such as D, with means for conveying motion
from the said motor to the said mandrel, and at a suitable speed from the said
mandrel to a threaded shaft I, adapted to rotate within a hollow fixed shaft G,
adapted to form a guide for a sliding carrier H¹, carrying the recording or repro-
ducing diaphragm and mounted upon a sleeve J, having a guide arm h, with
• bifurcated end h¹, engaging with a web ², upon the frame C, the said guide arm
carrying a threaded part-nut j, adapted to make contact with the shaft H, by the
action of a cam such as ', actuated by an arm-k, and spring 12, the said cam also
operating to place the stylus of the recording and reproducing diaphragms J³, in and
out of contact with a wax or other cylinder E, mounted upon the mandrel D, the
whole connected, combined and operating substantially as herein described and
shewn by Figs 1 to 8 of the accompanying drawings.
3rd. In a phonograph, the combination with a box or case A containing a suit-
able motor, and surmounted by a plate B, of a frame C, adapted to form bearings
for the spindle of a mandrel such as D, a threaded shaft such as H, and a pair of
rods K and K', with means for conveying motion from the said motor to the said
maudrel, and at a suitable rate of speed from the said mandrel to the said threaded
shaft H, the said rods K and K¹ forming guides for a sliding carriage K³, carrying
an arm L, adapted to slide therewith, the said arm being in one piece as at Fig 13,
or jointed as at Fig 11, and arranged to carry an internally threaded part nut sand
a recording or reproducing diaphragm E, and having a hand hold L¹, for placing
s in and out of contact with a threaded shaft H, and the stylus of the said dia-
phragm in and out of contact with a wax or other cylinder E mounted upon the
mandrel D, the whole connected, combined, and operating substantially as herein
described and shewn by Figs 9 to 14 of the accompanying drawings.
4th. In combination with a phonograph, as characterized by the preceding
claims, the construction and use of a mandrel having a shaft a, mounted at one end
only upon standards such as M and M¹, fixed upon the said plate B, with means
for conveying motion to the said shaft from the motor contained within the case A,
and at a suitable speed from the said shaft to the threaded shaft H, the said
mandrel consisting of a tapered casing R, surrounded by a tapered or parallel
casing R, adapted to receive and hold a wax or other cylinder E, substantially as
herein described and shewn by Fig 15 of the accompanying drawings.
5th. In combination with a phonograph, as characterized by claims 2 and 3,
the construction and use of a mandrel having a shaft a, mounted upon the plate B,
and receiving and conveying motion as set forth in the preceding claim, the said
mandrel consisting of sections T T and T, of wood or other material, a washer W,
and discs or rings V and V1, of rubber or other resilient material, alternating with
the said sections, and adapted to contract and expand by the tightening and loosen-
ing of a thumb or other nut W, upon the threaded end of the said shaft 1, in
combination with a metallic recording and reproducing cylinder such as E, the
whole connected, combined, and operating substantially as herein described and
shewn by Figs 16, 17 and 18, of the accompanying drawings.
0011
100%
GEO. THOS. HYDE,
No. 1, Broad Street Buildings, Liverpool Street, E.C.,
Agent for the Applicant.