close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3039787

код для вставки
June 19, 1962
R. E_ TROST
3,039,777
TUNING MECHANISM FOR DICTATING MACHINE
Filed Nov. 19, 1956
2 Sheets-Sheet 1
fa;
i
m
E
INVENTOR.
6
I
1
United States Patent 0 'ice
3,639,737?
Patented June 19, 1952
1
2
3,039,777
from the following description and the accompanying
drawing which, by way of example, disclose a presently
TUNING MECHANISM FOR DICTATING
MACHINE
'
Richard E. Trost, Dundee, 11]., assignor, by mesne assign
ments, to Victor Comptometer Corporation, Chicago,
111., a corporation of Illinois
Filed Nov. 19, 1956, Ser. No. 623,017
preferred embodiment of the invention.
In the accompanying drawing:
FIGURE 1 is a front elevational view of a machine
embodying the features of the invention;
FIG. 2 is an end view from the right of FIG. 1;
FIG. 3 is a fragmentary View oriented according to
FIG. 2, with some of the casing of the machine removed
This invention relates in general to dictating machines 10 to reveal certain interior elements;
and has more particular reference to tuning mechanism
FIG. 4 is a partial sectional view, taken substantially
for such machines.
along the lines 4-4 of FIG. 1, and drawn on a larger
During a transducing operation of such a machine,
scale and omitting certain portions of the machine not
9 Ciaizns. (Cl. 274’—17)
one or both of the transducer and record medium are
essential to the present invention;
so driven while they are in transducing relationship that
I FIG. 5 is a fragmentary horizontal sectional view taken
approximately on lines 5--5 of FIG. 1 and drawn on a
the transducer traces or retraces on the record medium
larger scale;
a path, the characteristic shape of which is determined
by the relative movement between the transducer and the
FiG. 6 is a rear view of certain of the elements of the
record medium. Thus in a transducing operation of such
interior of the machine and is taken approximately 011
a machine, it is possible to record and reproduce signals 20 lines 6-—6 of FIG. 3 at a diiferent scale;
'
along such a path.
FIG. 7 is a detail view taken approximately on lines
The term, tuning, as used herein, means initially es
7—-7 of FIG. 4 and shown on a larger scale;
tablishing and, when and where desired, re-establishing
FIG. 8 is an exploded view of the tuning cam assem
bly; and
such relative positions of the transducer and record
medium as to provide the optimum transducing rela 25
FIG. 9 is a large scale View of the tuning cam assem
tionship therebetween at the beginning of and through
bly and feed screw, taken approximately on lines 9—9
of FIG. 3.
out the tracing or re-tracing of such a path, whereby
to promote ?delity in the translation of signal volume
While for convenience the present invention is shown
during a transducing operation.
as being embodied in the magnetic type of dictating ma
Tuning usually involves the adjustment of the trans 30 chine disclosed in the co-pending United States Letters
ducer transversely of the path being traced for bringing
Patent application of Alfred E. Lorenz, Serial No.
the tracer member of the transducer into registration or
408,907, ?led February 8, 1954, it will be understood by
alignment with that path. In the manufacture and as
those skilled in the art that the invention is not limited
sembly of such a machine with the usual tuning mecha
nism, the relative positions of the record-medium sup
port, hence the record medium, and the transducer in
to such a machine but may be embodied to advantage in
various types of dictating machines.
The illustrated type of machine, generally described,
volves a strict adherence to close tolerances to ensure an
usually comprises, as shown in FIGS. 1, 4, and 6, a trans
acceptable transducing relationship between the trans
ducer head A, a rod or other suitable support B there
ducer and record medium at the beginning of a trans
for, a drivable carrier C for removably carrying and driv
ducing operation and to promote the desired coopera 40 ing a record medium D, and a head-traversing drive con
tion between the transducer and record medium during
nection E including a rotatable threaded shaft or feed
such an operation. If such adherence to permissible toler
screw F. In such a dictating machine, the head A is piv
ances is disregarded, tuning by the usual adjustment of
otally and slidably mounted on the support B for coop
the tracer member transversely of the path is di?icult of
eration with the record medium D on the carrier C. The
achievement at the beginning of and throughout a trans 45 transducer head is thus swingable in a direction sub
ducing operation.
'
stantially normal to the record medium between a trans
An object of the invention is the provision in a dictat
ducing position and a non-transducing position with re
ing machine of novel and improved tuning means for
spect to the record medium on the carrier C. When the
obviating strict adherence to close tolerances in the man
head A is in its transducing position, it is movable by the
ufacture and assembly of the transducer and record me 50 head-traversing drive connection E along the support B
dium supporting means in order to insure a proper trans
to traverse the record medium D for recording or re
ducing relationship between the transducer and record
producing signals thereon. When the head is in its non
medium.
transducing position, it is manually reciprocable along
Another object of the invention is the provision in such
a machine of tuning mechanism which is itself adjustable
for varying the limits and range of the tuning adjust
the support B to position the head for a subsequent
traversing of all or a portion of the record medium.
As is well-known in the art and disclosed in the above
ment.
mentioned application, the illustrated dictating machine
A further object of the invention is the provision in
such a machine of novel and improved tuning means for
adjusting one of the transducer or record medium rela
tive to the other of them not only transversely of the
path traceable on the record medium but also in a di
comprises suitable supporting, driving, control, ampli?er,
and casing means none of which per se constitutes any
part of the present invention and none of which is there
fore described in detail herein. It may be well, however,
to point out brie?y that in the illustrated machine the
transducer head A is of the magnetic type; the carrier C
rection transversely of that along which the transducer
comprises rotatable drive and tension rolls; the record
moves during a transducing operation, whereby to insure
proper cooperation between the transducer and support 65 medium D is an endless belt adapted to have magnetic
signals recorded thereon and to have such signals repro
for the record medium during a transducing operation.
duced by the transducer head A; the rotatable drive roll of
Another object of the invention is the provision of
the carrier C, the rod B, and the rotatable feed screw F
novel and improved tuning means or mechanism which is
are mounted parallel to one another with the rod above and
adapted for embodiment in a magnetic belt type dictat 70 slightly forwardly of the feed screw and with the drive
ing machine.
roll forwardly of and slightly below the rod; and the driv
Other objects of the invention will become apparent
ing means is adapted to rotate the carrier C and the feed
3,039,777
screw F in timed relationship, whereby during a transduc
ing operation the transducer head traces a helical path
on the record medium with the convolutions of the path
spaced transversely of the record medium.
7
As already mentioned, the carrier C includes drive and
tension rolls, now designated vby the reference numerals
t4.
amount from the vertical, radial plane of the drive roll
14. The optimum position referred to, without enter
ing into the details of recording relation relative to the
belt, is to be maintained in the manufacture of the device.
It will be understood that in production methods of manu
facture certain parts are permitted a relatively wide
latitude in tolerance. This tolerance that may otherwise
14 and 15, respectively. The drive roll 14 is provided with
be permitted could result in relatively great misalign
a plurality of teeth or projections 16 extending radially
ment of the tracer member 21 relative to the belt or re
outwardly from its peripheral surface near an end of the
roll for drivinglyengaging in spaced perforations 17 in 10 cord medium. However, the adjustment enabled by the
the belt along one of its margins. The tension roll 15
is mounted on a pivotally mounted arm 18 and is thus
screw 29 enables accurate alignment of the tracer meme
her 21 relative to the belt or record medium, without the
necessity for having the parts’ of accurate dimensions.
The carriage 22, shown in detail in the Lorenz appli
tensioning position shown in full lines in FIGS. 1 and 2. 15 cation Serial No. 489,201 referred to above, is mounted
for movement transversely of the belt and consequent
It also is releasably positionable in an intermediate, belt‘
movement of the transducer head A in that direction.
receiving and removing position, by means not shown here
The guide rod B which extends transversely of the machine
in but shown in the Lorenz application referred, to above.
is suitably mounted in frame elements 37 and 38 of the
The transducer head A and carriage therefor are pref
machine. The speci?c means for mounting the carriage
erably like those disclosed in the co-pending United States
on the guide rod includes a hub 39 receiving the guide
Letters Patent application of Alfred E. Lorenz, Serial No.
rod and slidable thereon. Associated with the carriage
489,20l,‘?led February 18,1955. i Such a transducer head
22 is means for feeding the carriage and thereby the
comprises a suitable casing 19 and a transducer therein
transducer head A along the guide rod B. The carriage
having a tracer member 21 depending therefrom outside
adapted to swing between an upper position shown in
broken lines in FIG. 2 and a lower or belt tightening or
of the casing and being relatively thin in a direction trans 25 includes a depending arm 41 having transverse tabs 42
(FIGS. 4 and 6) receiving the hub 3% and enabling rela
versely of the belt on the carrier C. The transducer head
. A is adapted to be mounted on a carriage 22 in such a
tive pivotal movement thereon. The lower end of the
arm 41 has a plate 43 secured thereto which with the
manner that the tracer member 21, when the head A is in
its transducing position, is closely adjacent the drive roll
lower extremity of the arm 41 cooperates with the feed
14 for lightly engaging the record medium thereon. In 30 screw F. This feed screw, as shown in, FIGS. 5 and 6,
the illustrated dictating machine, the engagement be
is journalled in suitable hearings in frame elements, such
tween the tracer member'rand record medium for optimum
as the element 44 at one end and the element 45 (FIG.
transducing relationship 'therebetween occurs in the ver
9) at the other end. The plate 43 and the lower ex
tical plane including the axis of the drive roll 14.‘
In the illustrated embodiment of the invention the car
riage 22 includes a main body portion 23 (FIG. 4) mount
tremity of the arm 41 are on e?fectively opposite sides
35 of the feed screw F whereby the arm 41 is normally
maintained or restrained by the feed screw against piv
ed forhmwovement in the manner described below and
otal movement relative to the axis of the guide rod. The
serving as the means directly to which the head A is se
surfaces on the plate 43 and arm ‘41 that engage the
cured. The head A has a rearwardly extending arm 24
feed screw do not eifect threadmg therewith for move
shown forconvenience as being U-shaped in cross sec 40 ment of the carriage, the surfaces being broad and en
tion (FTG. 6), and'?tted to the upper flat surface 25 of
gaging the outer extremities of the threads on the screw.
the body portion 23 and secured thereto ‘by means such
The feed screw F is driven by suitable means (not shown)
as screws 26 extending through slots 27 in the arm and
within the interior of the machine, but which may be the
threaded into tapped holes in'the body portion 123. The
slots 27 are longitudinally aligned and longitudinally elon
gated relative to. the arm 24 for enabling substantial hor
same motor that drives the drive roll 14.
A compression spring 46 reacting between a collar 47
on the screw and the adjacent frame element biases the
feed screw to a position from which adjustment is made
izontal adjustment of the transducer head A in a direction
transver'sely'of the axis of the drive roll 14.
The arm 24 is extended r'earwardly beyond the body
portion 23 where it has a downturned end portion 28 in
which is mounted an adjusting screw 29. The adjusting
for carrying out certain of the purposes of the present
invention. This position is to the left in FIG. 6 and to
the right in FIG. 5. The feed screw is biased toward the
screw may assume any of various practical forms, such as
that shown in detail in FIG. 7. The screw as here shown
or belt, relative to the transverse movement of the trans
the screw is ?tted in a‘ groove 35 formed in the rear face
left in the transducing operation. Adjacent the end
48 of the feed screw opposite the compression spring as
direction of the beginning margin of the record medium
ducer head A therealong in a transducing operation. As
has a circumferential groove 31 adjacent its inner end
viewed from the front, as in FIG. 1, the beginning margin
?tted in a slot 32 formed in a plate 33 secured to the rear
of the belt is to the right and the head A moves to the
face of the body portion 23. The inner extremity 34 of 55
of the body portion 23. Upon turning the screw 29, the
arm 24, ‘with the head A mounted thereon, is moved for
wardly or rearwardly according to the direction of the
is another collar 49 which serves as stop means for
limiting the movement of the carriage in that direction,
an elfect to be described hereinbelow.
turning of the screw, relative to the body portion 23, 60 to The
carriage 22 in addition to the elements mentioned
the reaction being provided by the plate 33. The screws
above includes also a depending arm 51 which may be
26 are, of course, loosened preparatory to making the
an integral extension of the body portion 23. ' The lower
adjustment of the head A, after which they are tightened
end of this arm has mounted thereon a leaf spring 52
to lock the arm in adjusted position.
The head A is thus adjustably mounted on the carriage 65 with a detent or latch 53 engageable with the lower end
of the arm 41. This detent releasably engages either
22 with the tracer member 21 above the drive roll 14.
By adjusting the head as just described, the tracer mem
ber is positioned for optimum transducing relationship
with the record medium on the carrier C. It will be
noted that such adjustment of the head A is in a direction
longitudinally of the arm 24 which in turn is on a line
transversely of the axis of the drive roll 14. Upon move
ment of the transducer head A in either direction from
side of the arm 41 for retaining the head A in a cor
responding position.
The transducer head is movable
from the transducing position shown in FIG. 4 to a non
transducing position raised therefrom, as by rotating the
transducer head clockwise (FIG. 4) about the guide
rod B.
In the lower or transducing position of the
unit the detent 53 engages the rear side of the arm 41
(F16. 4) and in the non-transducing position it engages
its position of optimum transducing relationship with the
record medium, it, is moved, angularly speaking, a large 75 the front side, in both cases releasably engaging the
3,039,777
5
arm for normally retaining the transducer head A in
the set position but enabling it to be moved to the
opposite position when the necessary external force is
main portion 61 lying substantially in a plane and having
an aperture 62 for mounting it and a tapped hole 63 ad_
jacent the periphery thereof. This disc-like member in
applied thereto.
cludes a cam element 64 at its periphery disposed at an
A third arm 54 is included in the carriage and is
mounted on the hub 39 by means of lateral tabs 50 hav
angle to the plane of the main portion 61. ‘This cam ele
ment is formed as by slotting the disc-like member and
ing aligned apertures receiving the hub.
turning or twisting the cam portion.
This arm is
The cam means also
includes a ?nger lever 65 including a plate portion 66
and on the outside or front side of the latter. A tension
which engages the disc-like element 59 and has an aper~
spring 55 interconnects the lower ends of the arms 54 10 ture 67 for mounting it. The portion 66 has an arcuate
and 41. Secured on the arm 54 is a plate-like element
slot 68 concentric with the axis of the aperture 67. This
56 having an edge 57 (FIG. 5) engageable with the
element also includes an arm 69 having a ?nger grip por
threads on the feed screw F for feeding the carriage
tion 7-1 on the outer swinging end thereof. The members
and transducer head A along the guide rod B. When
59 and 65 are ?tted and secured together and to a frame
the head is in its transducing position the edge 57 en
element 72 of the machine by means of a screw 73 inserted
gages the threads of the screw, and when the head is
through the apertures 67 and 62 and through the frame
raised to non-transducing position, the edge is out of
element where it is secured by suitable means such as a
engagement with the threads, enabling free sliding move
nut 74 over which the inner end of the screw 73 is peened.
ment of the carriage and head along the guide rod
A spring washer 75 is included in the assembly for ten
on the same side of the feed screw F as is the arm 51
as when so manually manipulated.
sioning the parts to snug engagement, and a suitable spacer
As in the co-pending Lorenz application, Serial No.
468,907 referred to above, provision is made for tuning
the dictating machine, but the tuning means in the present
75:: may be interposed for spacing the assembly relative
to the frame element 72.
A lock screw 76 is inserted
through the slot 68 in the plate portion 66 and threaded
instance includes improvements over that disclosed in the
into the hole 63 in the disc-like member 59. This screw is
said Lorenz application. The tracer member 21 traces
utilized for locking the members 65 and 59 in relative
a path on the belt that may be in the neighborhood of
angular positions about the axis of the screw 73 in a
manner described below.
.014 inch wide. This path is of helical form, as men
tioned above, brought about by the movement of the
The cam means 58, in assembly as described above, is
belt surface in linear direction around the rolls, and
mounted on the frame of the machine adjacent the end 43
simultaneous feeding of the transducer head A in trans 30 of the feed screw F (FIG. 6). The feed screw has sliding
verse direction along a path parallel with the axis of
engagement in its bearing supports and its end 48 is ex
the drive roll 14. The linear speedof the belt and
posed through the frame element 72. The cam means is
rate of rotation of the feed screw F may be selected
mounted in a position radially offset from the feed screw,
for coordination to produce any desired spacing of the
such as below the feed screw in position for the cam ele
convolutions of the helical path, but it is desired that 35 ment 64 to engage the end of the screw. Upon rotation
this spacing be on the order of 1/32 inch.
of the cam means about the axis of the mounting screw 7-3
After a recording or dictating operation the record
the cam element 64, being inclined at an acute angle to
medium is placed in a signal reproducing machine.
that axis and engaging the end of the feed screw, produces
This may be the same machine in which the recording
an axial shifting elfect on the screw.
The arm 69 and ?nger piece 71 project through a slot 77
in a portion 78 of the machine casing, which then is ex
other machine. The present machine may be utilized
either for recording, or for transcribing or reproducing,
posed to the front of the machine for easy access by the
operator. The slot 77 de?nes the range of swinging move
but it is possible that a different machine, although simi
lar to the present, be utilized for transcribing or repro
ment of the arm, by engagement of the arm with the ends
ducing. Vfheu a different machine is used for trans 45 of the slot. Upon movement of the ?nger piece 71 and
cribing or reproducing, and normally when the same dic
arm in downward direction the cam element 64 effects
axial shifting movement of the feed screw F in inward di
tating machine is used for transcribing or reproducing,
the record medium is removed after completion of the
rection (to the right, FIG. 6), and upon movement of the
?nger piece in upward direction the camming effect is re
dictating operation and later replaced on a machine for
moved and the compression spring 46 shifts the feed screw
the reproducing operation. When the record medium is
in the opposite or outward direction. The extent of shift
so placed in the reproducing machine it is, of course,
ing of the feed screw is preferably an extent at least as
desired that the tracer member be accurately aligned
great as the transverse spacing between adjacent convolu
with the signal path and not be misaligned relative there—
tions of the signal path on the belt. In the case mentioned
to in a transverse direction along the axis of the roll.
This may be made necessary, for example, because of 55 above the spacing is approximately 1/32 inch. Obviously,
any desired spacing may be utilized but regardless of the
the turning of the belt end-for-end, i.e., turning it 180
or dictating operation was performed, or it may be an
degrees rotation or revolution about a transverse axis.
40
magnitude of the spacing, provision is preferably made for
shifting the feed screw, and consequently the transducer
In such case the signal path convolutions would be dis—
head A, an extent at least as great as mentioned so that
placed a distance equal to one-half spacing between the
convolutions, relative to the position of the head A at 60 upon shifting the head in one direction or another it may
the completion of the dictating operation. In order to
accurately align the tracer member of the transducer with
the signal path, in such case, provision is made for
relative shifting movement between the record medium
be made to register accurately with the signal path.
It is desired that in addition to the tuning operation de
scribed, as by shifting the feed screw F, adjustment be
made in the cam means 58 for properly positioning the
or belt D and the tracer member 21 in direction parallel 65 range of shifting movement of the transducer head relative
with the axis of the roll 14. In the preferred arrange
to the range of movement of the arm 69. In manufac
ment this is accomplished by so shifting the tracer mem
turing methods, as was explained above, considerable lati
ber 21, which is done by moving the transducer head A
along the guide rod B. This is most effectively accom
plished by shifting the feed screw F.
This shifting movement is effected by tuning cam means
indicated generally at 58 (FIGS. 3, 6, 8, and 9). The
tude and tolerance is permissible from the standpoint of
most considerations. However, it is desired to provide
for alignment of the tracer member 21 transversely of the
belt with particular regard to the starting position thereof
or along the beginning margin of the belt, which in this
parts making up the assembled cam means are best shown
case is the righthand margin as viewed in FIG. 1. Stop
in the exploded view of FIG. 8 and include a disc-like ele
means is provided for limiting the movement of the tracer
ment 59 which is preferably a stamping and includes a 75 member to such beginning position. This stop means
3,039,777
e
.
preferably consists of the collar 49 on the feed screw
(FIGS. 5 and 6) against which the carriage abuts. The
desired relation is that when the unit is moved to the begin
ning position in which the carriage abuts the collar 49,
the tracer member 21 is in the desired alignment relative
to the beginning margin of the belt. Due to ordinary
manufacturing tolerances, such alignment may not be ac
curately achieved in mass production assembly of ma
chines. The adjustment between the members 65 and 59
enables accurate alignment of the character mentioned
8
as the distance between adjacent convolutions of said
helical path.
2. In a dictating machine, a belt of magnetic material,
means for moving the surface of the belt in a linear path
about a transverse axis, a magnetic transducer having a
transducing position relative to said belt, feed means for
uniformly moving the transducer transversely of the di
without the necessity of precision in fabricating the parts
rection of movement of the belt when the transducer is
in transducing position to trace a helical path on the belt,
means for producing shifting movement of the transducer
a limited distance transversely of said helical path other
or assembling them.
than the uniform transverse movement, when the trans
The cam element 64 has an angular
dimension substantially greater than that required for the
ducer is in transducing position, and including a movable
actuating element indirectly engageable with said trans
necessary shifting of the feed screw. In the present case
this angular dimension is on the order of twice that actual 15 ducer and a ?nger lever for moving the actuating element,
ly required for the purpose mentioned. For any given
said actuating element being operable through a range
setting of the disc-lire element 59, the feed screw F and
suf?cient for shifting the transducer a distance at least as
transducer assume a de?nite position.
The arm 69 is
limited in its movements by the ends of the slot 77 and
because of the tolerances mentioned above, the range of
movement of the arm 69, as determined by the slot, may
not be positioned, in angular relation to the cam element
64, for properly positioning the transducer head A adjacent
the beginning margin of the belt.
In such case the lock
screw 76 may be loosened and the elements 65 and 59 rela
tively shifted angularly about the axis of the mounting
screw 7 3 to a new position for positioning the cam element
64 with relation to the range of movement of the arm 69
so that the tracer member 21 is properly aligned with the
beginning margin of the belt at the desired point in the
range of movement of the arm 69.
Thereafter the lock
screw 76 is tightened for locking the members 65 and 59
in the new relative angular position.
This adjustment of the cam means eliminates the neces
great as the spacing between adjacent convolutions of said
helical path, said ?nger lever being movable through a
range suf?cient for operating said actuating element
through its range and being releasa‘oly secured thereto for
adjustment relative thereto to any position within a range
equivalent to the range of movement of the actuating
element.
3. The invention set out in claim 2 in which said actu
ating element is mounted for rotary movement and said
?nger lever is swingable about a common axis with the
actuating element.
4. The invention set out in claim 2 in which the feed
means includes a feed screw parallel with said axes, the
actuating element is mounted for rotary movement and
has a cam element engaging the feed screw and operative
for axially shifting it in response to rotary movement of
the actuating element, and said ?nger lever is swingable
sity for adjusting the transducer head A relative to its
carriage in transverse direction. It is desired that the
about a common axis with the actuating element.
tracer member 21 constantly assume a position in a plane
means is provided on said feed means for limiting move
5. The invention set forth in claim 2 in which stop
ment of the transducer in one direction for locating it at
perpendicular to the axis of the drive roll 14 and this
relation may be maintained While adjusting the parts for , a predetermined position relative to a beginning margin of
aligning the tracer member 21 with the beginning margin 40 the belt.
6. In a dictating machine, a belt of magnetic material,
of the belt, by means of the cam means 58. Additional
means for moving the surface of the belt in a linear path
ly, the tracer member 21 may be adjusted relative to the
about a transverse axis, a magnetic transducer having
carriage in direction transversely of the axis of the drive
a transducing position relative to said belt, feed means for
roll 14 without interfering in any way with the adjust
ments made by the cam means 58.
It is thought that the invention and its attendant ad
vantages will be understood from the foregoing descrip
tion, and it will be apparent that various changes may be
made in the form, construction and arrangement of the
parts without departing from the spirit and scope of the
invention or sacri?cing all of its material advantages, the
form hereinbefore described and illustrated in the drawing
being merely a preferred embodiment thereof.
I claim:
1. A dictating machine comprising a belt of magnetic
material, a pair of rolls disposed on spaced parallel axes
for mounting the belt for movement through a linear path
uniformly moving the transducer transversely of the di
rection of movement of the belt when the transducer is in
transducing position to trace a helical path on the belt,
means for producing relative shifting movement between
said belt and transducer a limited distance in direction
transversely of said helical path other than the uniform
transverse movement, when the transducer is in transduc
ing position, and including a movable actuating element
indirectly engageable with the shiftably movable one of
said belt and transducer and a ?nger lever for moving
the actuating element, said actuating element being op
erable through a range sufficient for causing said shifting
movement a distance at least as great as the spacing be
tween adjacent convolutions of said helical path, said
?nger lever being movable through a range su?icient for
movable for moving said transducer between a transducing 60 operating said actuating element through its range and
being releasably secured thereto for adjustment relative
position and a non-transducing position relative to said
thereto to any position within a range equivalent to the
belt, feed means for moving said carriage and thereby said
range of movement of the actuating element.
transducer uniformly transversely of the direction of
7. A dictating machine comprising a belt of magnetic
movement of said belt, when the transducer is in trans
ducing position, for tracing a helical path on the belt, 65 material, a pair of rolls disposed on spaced parallel axes
for mounting the belt for movement through a linear
said carriage including an arm rigidly supporting said
path about said axes including a curved portion, a mag
transducer and slidable longitudinally in a straight line
netic transducer, a carriage mounting said transducer and
lying in a plane perpendicular to said axes and, when the
movable for moving said transducer between a transduc
transduced is in transducing position, tangent to a circle
concentric with said curved portion of said path, means 70 ing position and a non-transducing position relative to
said belt, feed means for moving said carriage and thereby
mounted on said carriage for adjustably moving said arm
said transducer uniformly transversely of the direction
and transducer along said line, and means for shifting the
about said axes including a curved portion, a magnetic
transducer, a carriage mounting said transducer and
transducer a limited distance transversely of said helical
path, relative to any position of the transducer due to said
of movement of said belt, when the transducer is in trans
ducing position, for tracing a helical path on the belt,
uniform transverse movement, a distance at least as great 75 said carriage including an arm rigidly supporting said
3,039,777
10
transducer and slidable longitudinally of the arm in a
straight line lying in a plane perpendicular to said axes
when in transducing position conjointly with the belt in
and, when the transducer is in transducing position, tan
each corresponding opposite direction.
gent to a circle concentric with said curved portion of
said path, and means mounted on said carriage for adjust
ably moving said arm and transducer along said line.
8. The invention set out in claim 7 wherein said adJust
able moving means includes a screw reacting between said
arm and another portion of said carriage, and the con
struction includes means for locking the arm, and thereby 10
and in which means is included for moving the transducer
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,683,038
2,702,710
2,729,453
Saliba ________________ __ Jan. 6, 1954
Conrad ______________ __ Feb. 22, 1955
Camras _______________ __ Jan. 3, 1956
2,802,905
Taris ________________ __ Aug. 13, 1957
9. The invention set out in claim 2 in which the
2,864,892
Perkins ______________ __ Dec. 16, 1958
means for moving the surface of the belt is operable for
so moving it selectively in each of opposite directions,
746,243
Great Britain _________ __ Mar. 14, 1956
the transducer, in adjusted position.
FOREIGN PATENTS
Документ
Категория
Без категории
Просмотров
0
Размер файла
944 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа