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Патент USA US2407890

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Sept. 17, 1946. .l
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1f. w. MaòKENzm
AUTOMATIC
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2,407,889
TELEPHONE-DIALER
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Filed June 9, 1944
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INVENTOR
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sept. 17, 1946.
ÀT. w. MacKENzIÉ
.2,407,889
.AUTOMATIC TELEPHONE DIALER
Fnea June _9, 1944
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Patented Sept. 17, 1946
2,407,889
UNITED STATES PATENT OFFICE
2,407,889
AUTOMATIC TELEPHONE DIALER
Thomas W. MacKenzie, Cranford, N. J.
Application June 9, 1944, Serial N0. 539,512
21 Claims. (Cl. 179-90)
2
has been illustrated as a unit independent and
This invention relates to apparatus for use in
apart of telephone receiver and transmitting ap
paratus, except of course, for the electrical con
nections which would be made With the con
ventional apparatus. In other words, in my ear
kind adapted for inter-department or house call
lier application, the casing of the apparatus in
ing systems. More particularly, the invention re
cluded the means for supporting the receiver and
lates to an apparatus employing a large number
transmitter as well as the dialing apparatus,
of closely and compactly arranged keys divided
whereas in the «present structure, the casing is
into two banks or sides, each bank or side operat
ing independent control or call mechanisms, 10 devoted primarily to the mechanism of the dialer,
thus materially simplifying the construction of
whereas means is employed whereby the opera«
this apparatus and minimizing the size thereof.
tion of a key in one bank will automatically lock
In the drawings, Iâ represents a casing, prefer~
adjacent keys in said bank and in the opposed
ably having an inclined top wall II formed by a
bank. The novel features of the invention 'will
short front wall I2, and a longer back wall I3, as
be best understood from the following descrip
will clearly appear from a consideration of Fig. 2
tions when taken together with the accompany
of the drawings. Within the casing is arranged
ing drawings, in which certain embodiments of
supplemental end walls I4 and I5 which form the
the invention are disclosed, and in which the sep
bearings and supports for the various shafts em
arate parts are designated by suitable reference
characters in each of the views; and in which:
20 ployed, as will clearly appear from a considera
tion of Figs. 3, 4 and 5 of the drawings. The end
Fig. l is a plan view oi an apparatus made ac
walls i4 and I5 are joined by a top plate casting
cording to my invention, with part of the con
automatically making telephone calls for normal
interechange uses within the range of a self-call
ing area, as well as devices or apparatus of this
struction ‘broken away and in section.
I5, shown in section in Fig. 2 of the drawings,
to which is attached side key guide plates I1,
which in conjunction with the plate I5 form ver
tical apertures or key channels I8 for supporting
and guiding a plurality of keys I9 and 20. Ar
c
Fig. 2 is a longitudinal sectional view substan
tially on the line 2_2 of Fig. 3, with parts of the
construction shown in elevation.
Fig. 3 is a partial section on the line 3-3 of
Fig. 2.
Fig. ‘i is a partial section on the line 4-4 of
ranged upon the top of the casing I0 is a cover
plate 2l which also has apertures therein in
30 registering alinement with the apertures I8.
Fig. 2, showing a different key depressed.
The casting I6 has two longitudinal raised ribs
Fig. 5 is a partial section on the line 5-5 of
212, note Fig. ll, which have therein longitudinally
Fig. 2.
‘
spaced and directly opposed bores or passages 23,
Fig. 6' is a partial section on the line 6-6 of
in which are mounted independent rods 24, inner
Fig. 2, showing only a part of the construction.
Fig. '7 is a view similar to Fig. 4, but showing 35 adjacent ends of which are reduced to receive coil
springs at 25. At the outer ends of the rods are
only a part of the construction with parts in a
Aarranged balls 26 which normally seat in recesses
diiierent position.
21 in the keys I9 land 20 to retain all of the keys
Fig. 8 is a broken detailed section on the line
in raised position, as indicated at the left of Fig.
8-8 of Fig. Li; and
Fig. 9 is a partial section on the line 9_9 of 40 4 of the drawings. However, in the depression off
one of the keys, the balls at the opposite sides of
Fig. 3.
the depressed key are moved laterally in opposite
rlî‘his application constitutes a continuation in
directions to lock adiacent keys in one row and
part c-f the structure disclosed in my prior ap
the balls also move inwardly to» jam the rods
plication serial number 432,677, filed February 2’7,
1942 now Patent No. 2,391,911 granted January 1, 45 24 against the balls of the keys in the opposed row
or bank to lock these keys against depression,
1946, in which application an apparatus of the
thus preventing accidental operation of more
general type and kind herein disclosedis illus
than a single key at any one time. In the broken
trated, which apparatus is modiñed ‘and altered
away portion of Fig. 1 of the drawings, one of the
to the extent more ~fully hereinafter set forth, and
particularly in that each row or bank of keys op
erate independent pawl mechanisms, thus mini
mi2-„ing complications which would prevail in ap
paratus employing a single mechanism operated
‘oy all the keys employed.
50
keys `I9_is shown depressed, which key is shown
in complete rectangular cross section, Whereas
adjacent keys show the balls 26 engaging the
recesses 21 thereof.
It will be understood that the entire mecha
the present construction, the apparatus 55 nism may be insertable into and out of the cas~
2,407,889
3
in
4
titl, and retained therein by any suitable
means as a botto-m plate 28 secured to the casing,
and the casing will have at one end, as at 29 open
Secured to the switch operating rods 62 are
insulators, sleeves or rollers 65 adapted to en
gage and operate one spring contact 56 to move
ings iol1 admission of the circuit wires for attach
the same into engagement with an adjacent con
ment to the switches employed, and later CR tact 6l in the manner illustrated in Fig. 7 of the
described.
drawings to complete the electric circuit to the
Arranged longitudinally of the unit and ro
telephone apparatus in automatically dialing or
tatably mounted in the opposed end walls I4 and
transmitting a telphone number by one of the
I5, are two elongated gears 3l! and SI. These
depressed keys of the apparatus, as later de
gears have shaft portions v32 and 33 respectively,
scribed.
which extend through the end wall I5, and
The spring contacts 66 and 61 are supported in
a block of insulating material 68, as is also other
ets 36 and 3l, note Figs. 3 and 5 of the drawings.
spring contacts 69, forming parts of the make
The ratchets 36 and 3l are secured to the
and break circuits, and engaged by the make and
shafts, whereas the gears 34 are free to rotate
break element lll, rotated between the contact 69
on the shaft. Pivoted to `the face of each gear
and associated contacts 1l in providing ythe de
34 and 35 is a pawl 38 actuated by a spring 3S
sired impulses controlling the signal or call trans
to support the same in constant engagement with
mitted to the telephone system in calling a pre
the ratchets 36 and 3l, so that upon depression
determined number in the upward movement of
of one of the keys I9-2Il, its associated elongated 20 a depressed key, as more specifically described
gear 3*-3I is rotated to rotate the ratchet
later.V
35-31 freely beneath the respective pawls 36, so
Each make and break element 10 is mounted
that, in the spring motor rotation of the elon
on a shaft arranged in the wall I 5, and has at
gated gears, the ratchets will operate to rotate
its outer end a pinion l2 which meshes with a
the gears 34-35 for operating the circuit maker '
gear 'I3-arranged on a stub shaft 'I4 supported in
the wall I5. On the shaft 'I4 is a pinion ‘I5 which
and breaker mechanism, later described.
Arranged inwardly of the gears 3S and 3l are
meshes with the gear 34--35. As each of the
two shafts 4i) and 4I on which are arranged pin
several unit mechanisms arecommon to both
ions 42 and 43, note Fig. 3, These pinions are
sides of the apparatus, one reference has been
in constant mesh with the gears 3-3I, and in
used in identifying each unit in order to reduce
the initial rotation or the gears 3ii*3l the pin~
the number of characters applied to the draw
ions are rotated to wind-up elongated coil springs
ings. Also arranged on the shaft supporting the
44 and 45, which springs then serve to rotate
pinions l2, and outwardly of said pinions are
the gears 34-35 through the medium or" the
spiral gears ‘I6 registering with corresponding
ratchets 36*3'I, as previously described.
gears 'Il on the shafts of governor devices 'I8 ai'
In the construction shown, the motors ¿$4 and
ranged in suitable supports 'I9 on the outer sur
45 are formed from. a single wire, the central
face of the wall I5,
portion of which is looped around a, stud or screw,
Inner surfaces of the keys I6 and 2i) have rack
as seen at 46 in Fig. 4 of the drawings to anchor
teeth 80 which are adapted to mesh with the
one end of each motor. The other ends of these 40 gears 30 and 3| to rotate these gears by the pres
springs or motors 44~45 are keyed to collars
sure applied to the keys in the downward move
4'! and 46, as seen in Fig. 3 of the drawings, the
ment thereof. On the outer surfaces of the keys
collars being secured to the shafts 4U and ¿I I. The
I9 and 20 are arranged longitudinally spaced
shafts 4 and 4I prortude through the end wall
V-shaped recesses 8| between which are surfaces
mounted thereon are gears 34 and 35, and ratch-` .
42, and adjustabiy secured thereon are stops 49
and 58 which check the iinal rotary movement
of the gears 30 and 3l, _
Arranged outwardly of the gears 3U and 3 l , and
62 forming spaced elements characterizing pre
determined telephone numbers, these surfaces or
elements are of diiferent lengths, and the lengths
of these surfaces control the period of time that
one of the rods 5I and 52 is held in the position
slightly above these gears, are two- longitudinal
control or escapement rods 5i and 52, which are '.50 shown in Fig. 7, completing the circuit through
rectangular in cross sectional form throughout
the contacts 5B and Sl, However, when the call
the major portion of the length thereof, at least
rod 5I~-52 drops into one of the recesses 8|, the
throughout such lengths of the rods as will be
circuit between the contact 56 and 5l will be
exposed to the row or bank of keys I9 and 2e em
broken. The construction of the keys I9 and 2D
ployed.
are generally of the type and kind more spe
These rods are normally supported with ,
the high-points of the rectangular cross section
thereof arranged horizontally, as clearly seen in
Fig, 4 of the drawings, by springs 53 secured to
blocks 54 mounted on the ends of the rods El
oiiically disclosed in my prior application 432,676,
to the wall I5, as seen at 59.
drawings.
being modified in the present case in the con
tour of the recesses 8| and in inclusion of the
rack teeth 80 thereon.
and 52, which protrude through the wall I4, as 60
The upper ends of the keys I9 and 2i) have Ilat
clearly seen in Fig. 6 of the drawings. Adjacent
ringer pieces 83 of the general contour, seen in
ends of the springs 53 are secured to a common
Fig. 1 of the drawings, by means of which each
post 55, Secured to the rods adjacent the wall
of the keys may be depressed, and these finger
I5 are pinions 56. These pinions 56 are adapted
piece endsor heads of the keys are directed in
to register with rack faces 51 on levers 5S, pivoted
wardly in the manner seen in Fig. 1 of the
~
.
The free ends of the levers have pinions 6@
Adjustably secured on the shafts 40 and 4I
which operate in elongated slots 6I in switch
are interfitting key locking elements 84 and 85,
operating rods 62. Also coupled with the pinion
each having a recess B6 in the periphery thereof
6i] are springs 63 supported on the wall I5, as 70 adapted to receive the other element. In other
seen at 64, to normally maintain the levers 58
words, in the rotation of the shaft 4D, the ele
in perpendicular position. These latter springs
ment184 will enter the recess 86 of the element
also cooperate with the springs 53 to maintain
85, and thus key the element 85 against rota
the rods 5I and 52 in their normal position, as
tion. This will automatically lock all of the keys
seen in Fig. 4.
‘
’
`
in the row controlled by the spring motor 45
5
6
and gear 3l against operation. The same oper
ation takes place when the element 85 is rotated
and enters the recess 86 of the element B4.
complete apparatus is ininimiied, particularly as
ward movement, the rod 52 will be partially ro
ently on certain of the keys by reason of the ar
tated and this partial rotation will throw the
associated lever 58 inwardly in the slot 6 l. How
ever, when the depressed keyl reaches its lower
rangement i'llustrated in Fig. 1 of the drawings.
compared with the structure disclosed in my
earlier application, wherein the complete mech
anism was always in operation regardless of what
Bearing in mind that each row or bank of
keys actuates independent mechanisms, one bank Cl key was depressed. In other words, with the
and row of keys can be used for an intercom
present construction, the question of wear is dis
municating system, whereas the other rowlor
tributed between the two unit transmitting mech
bank of keys can be used for other or outside
anisms, thus giving longer life to the entire ap
calls by simply constructing the switch devices
paratus. i’r‘roni the above described operation,
and the wire accordingly.
it will be understood that the locking of adjacent
In the operation of automatically calling a tel
keys heretofore speciñcally described takes place,
ephone number, the particular key I9--20 which
as well as the locking of rows of keys through
would have thereon the surface markings Y82
the lock elements Sil-»85, and this renders the
governing the number to be called, will be de
apparatus foolproof.
pressed by the operator. In the accompanying
It will be noted that each key is of the same
drawings, one of the keys I9 has been shown de
construction, and thus one standard type of key
pressed< in Figs. l, 2, 3, 4 and ’7 of the drawings.
will be made, this enables the keys to be shifted
In the downward movement oi the keys, the shaft
into dliîerent positions at either side ofthe ap
3i? is rotated, which in turn rotates the pinion
paratus, or in either row of keys, excepting that
d2, and winds the spring motor 44. In this down 20 the finger piece ends 83 may be directed differ
inost position, the reduced collar or neck portion
2l on the key is brought into registering aline
inent with the rod 52, and thisrod is then auto
matically returned to its neutral position, the
result of which is shown in Fig. 4 of the drawings.
When pressure is released from the key, the
motor et through the mechanism previously de
scribed now feeds the key upwardly. This op
eration rotates the rod 52, and throws the lever
53 outwardly in the manner shown in Fig. 7, thus
completing the circuit between the contact 66
and 51 at the one side of the apparatus. Here
it is to be understood that the switch operating
rods 62 are independent. Contact will be kept
closed through the switches 65 and 61 as long
as the ñrst surface 82 of the lever maintains the
rod 52 in the position last mentioned. Imme
diately upon reaching the first notch 3l in the
The keys are all of the same structure and the
ringer piece ends may be attached in any desired
manner, the details of this not being shown in
the accompanying drawings. This is desirable
from the standpoint of keeping keys which are
operated more frequently at convenient positions
on the dialer.
By utilizing keys of the square cross sectional
contour, these keys may be easily guided and
supported in the'apparatus and can be econom
ically produced. Still further, the square cross
sectional contour oi the operating rods 5I--52
l materialiy simplifies the structure of these ele
ments and apparatus, and if any appreciable
wear should appear on the surface engaged by
the keys, these rods may simply be turned to
ring a new surface or corner into position, thus
vfour wearing surfaces are provided.
Having fully described my invention, what I
claim as new and desire to secure by Letters >Pat
outer surface or” the key, the rod 52 returns to
ent is:
its neutral position shown in Fig. 4, thus break
l. An automatic telephone dialer com ri. ing a
ing the circuit through the contacts 5S and 61. 45 frame, means forming two rows of longitudinally
Upon engaging the next successive surface 82,
spaced key receiving channels at the upper por
the above operation is repeated, and this is con
tion of the frame, keys having rack surfaces
tinuous until the last surface has been passed
mounted to move vertically in said channeis, clon
and the key is returned to its normal raised
gated gears in the frame one adjacent each rou1
position.
50 oi keys and adapted to be operated by any one
In returning to the normal raised position the
of the keys in a row, spring motors operatively
gears 3ii--3l move the keys upwardly, about until
engaging said gears, two control rods, one ar
the two spring pressed balls 2t at opposite sides
ranged longitudinally of each row of keys, said
of each key start to enter the recess 21 of the
rods being of rectangular cross sectional form,
raised key, and these balls in engaging the re (55 means maintaining said rods in operative engage
cesses 2l actually impart the iinal upward move
ment with spaced elements on each. of the keys
ment to the key by snapping into the recesses
characterizing predetermined telephone numbers,
2l, which movement also moves the key into the
two independent impulse transmitting devices,
position clearing its operating gear, as is illus
independent switches controlling circuits to said
trated at the left of Fig. ‘i of the drawings. This
devices, and means in direct operative engage
iinal upward movement will also give a slight
ment with each bar for closing and opening,r the
clicking sound which will advise the operator
circuit through an associated switch device in
that the call has been completed, even though
controlling automatic transmission of a telephone
it takes place slightly after the actual comple
number by movement of a key relatively to its
tion of the call.
65 associated rod.
During the above operation, it will be under
2. An automatic telephone dialer comprising a
frame, means forming two rows of longitudinally
stood that the make and break element 'l0 is
constantly rotated to provide the usual make and `
spaced key receiving channels at the upper por
break impulses which govern the call signal
tion of the frame, keys having rack surfaces
transmitted as and when the circuit is completed 70 mounted to move vertically in said channels,
through the contacts 66 and 61. It will also be
elongated gearsl in the frame one adjacent each
understood that while one unit side of the ap
row of keys and adapted to be operated by any
paratus is in operation, the other unit side is
one of the keys in a row, spring motors opera
stationary or idle. By reason of this construc
tively engaging said gears, two control rods, one
tion, the wear on the operative parts of the 76 arranged longitudinally of each row of keys, said
2,407,889
l
8
rods being' of rectangular cross sectional form,
keys, the opening and closing of said switch,
means maintaining said rods in operative engage
ment with spaced elements on each of the keys
said last named means comprising a lever having
characterizing predetermined telephone numbers,
two independent impulse transmitting devices, in
rack of said lever, and a switch operating bar
in operative engagement with said lever.
6. In an automatic telephone dialer of the class
a rack surface, a gear on said rod engaging the
dependent switches controlling circuits to said de
vices, means in direct operative engagement with , described, a frame, means for supporting a row
each bar for closing and opening the circuit
of call keys longitudinally of the frame, keys ar
through an associated switch device in controlling
ranged in said last named means, each key hav
automatic transmission of a telephone number 10 ing on one surface a gear rack and on the other
by movement of a key relatively to its associated
surface spaced elements characterizing a tele
rod, said last named means comprising a switch
phone number to be called, an elongated mem
operating bar, and a lever directly actuated by
ber having means adapted to operatively engage
said rod for moving the bar to close said switch.
the rack of all of said keys in thedepression of
3. An automatic telephone dialer comprising a 15 said keys, a spring motor` operatively engaging
frame, means forming two rows of longitudinally
said elongated member and wound upon the `de
spaced key receiving channels at the upper por
pression of any one of the keys in said row,
means transmitting impulses to a telephone cir
tion of the frame, keys having rack surfaces
mounted to move vertically in said channels, elon
cuit, means placing said elongated member when
gated gears in the frame one adjacent each row 20 actuated by the spring motor in operative en
of keys and adapted to be operated by any one
gagement with said last named means, a switch
of the keys in a row, spring motors operatively
controlling the circuit to said impulse transmit
engaging said gears, two control rods, one ar
ting means, and a single member operatively en
ranged longitudinally of each row of keys, said
gaging the spaced elements of all of said keys
rods being of rectangular cross sectional form, 25 in controlling said switch.
means maintaining said rods in operative engage
'1. In an automatic telephone dialer of the
ment with spaced elements on each of the keys
class described, a frame, means for supporting a
characterizing predetermined telephone numbers,
row of call keys longitudinally of the frame, keys
two independent impulse transmitting devices,
arranged in said last named means, each key hav
independent switches controlling circuits to said
ing on one surface a gear rack and on the other
devices, means in direct operative engagement
surface spaced elements characterizing a tele
with each bar for closing and opening the circuit
phone number to be called, an elongated mem
through an associated switch device in controlling
ber having means adapted yto operatively engage
automatic transmission of a telephone number by
the rack of all of said keys in the depression of
movement of a key relatively to its associated rod,
said keys, a, spring motor operatively engaging
said last named means comprising a‘switch oper
said elongated member and wound upon the de
ating bar, a lever directly actuated by said rod for
pression of any one of the keys in said row,
means transmitting impulses to a telephone cir
moving the bar to close said switch, and means
providing free movement of the lever relatively
cuit, means placing said elongated member
to the bar in the depression of a key.
when actuated by the spring motor in operative
4. In an automatic telephone dialer of the class
described employing a frame, with means for sup~
porting two independent rows of keys in said
engagement with said last named means, a switch
frame and exposed through one surface thereof,
each row of keys having an independent operable
ing the spaced elements of all of said keys in
controlling said switch, said keys having in
controlling the circuit to said impulse transmit
ting means, a single member operatively engag
unit controlling transmission of a telephone num
wardly of the racks and elements thereon re
ber in actuation of one of the keys in said rows,
cesses, and means in the frame operatively en
each unit comprising an elongated gear, means
gaging the recesses of said keys to support the
on each key of a row for independently rotating
same in raised position.
l
said gear, an elongated control bar arranged lon 50
8. In an automatic telephone dialer employing
gitudinally of the row of keys and operatively en
a row of keys, with means for supporting said
gaging characterized elements on said keys, each
keys for inward and outward movement with
unit having means transmitting impulses to a tel
respect to the support, means directly operable
ephone circuit and a switch controlling the circuit
by one movement of any one of the keys in a
row for actuating a motor to move the keys in
to said last named means, and each unit having
means directly operable by said bar controlling,
.the opposite direction, an elongated rod of rec
through the medium of the elements on said keys,
.tangular cross sectional form arranged longi
the opening and closing of said switch.
5. In an automatic telephone dialer of the class
tudinally of and in operative engagement with
all of said keys, means spaced longitudinally of
described employing a frame, with means for sup 60 the surface of all of said keys arranged adjacent
said rod for imparting intermittent rotary move
porting two independent rows of keys in said
ment to said rod- in the last mentioned movement
frame and exposed through one surface thereof,
of the keys, and means in operative engagement
each row of keys having an independent operable
with said rod for opening and closingr an electric
unit controlling transmission of a telephone num
circuit in the intermittent rotary operations of
ber in actuation of one of the keys in said rows,
each unit comprising an elongated gear, means
on each key of a row for independently rotating
said gear, an elongated control bar arranged lon
said rod.
9. In an automatic telephone dialer employing
a row of keys, with means for supporting said
keys for inward and outward movement with re
gitudinally of the row of keys and operatively
engaging characterized elements on said keys, 70 spect to the support, means directly operable by
each unit having means transmitting impulses
one movement of any one of the keys in a row
to a telephone circuit and a switch controlling the
circuit to said last named means, each unit hav
ing means directly operable by said bar control
ling, through the medium of the elements on said
for actuating a motor to move the keys in the
opposite direction, an elongated rod of rectan~
gular cross sectional form arranged longitudinally
of and in operative engagement with al1 of said
2,407,889
9 .
10~
keys, means spaced longitudinally `of the sur
trolling transmission of predetermined telephone
face of all of said keys arranged adjacent said
numbers in one movement of said keys relatively
to said frame, said keys each including gear
racks on the surface thereof opposed to said ele
rod for imparting intermittent rotary movement
to said rod in the last mentioned movement `of
the keys, means in operative engagement with
said rod for opening and closing an electric cir
cuit in the intermittent rotary operations of said
rod, and means rendering the last named means
inoperative in the nrst named movement of the
keys with respect to said rod.
10. In an apparatus Vof the class described em
ploying an impulse transmitting means and a
switch controlling the circuit -to said means, a
spring motor for actuating said iii-st named
ments, and a single gear member arranged longi
tudinally of each row of keys adapted to be op
erated by any one oi the keys in a row for putting
the apparatus in operation.
lll. An apparatus of the class described com
prising a unit frame, said frame having a longi
tudinal gear at each side oi the frame, a rectan
gular'ro'd adjacent and longitudinally of each
gear, coil spring motors inwardly of said gears
with means engaging the gears for winding said
means, means involving a key for winding said 15. motors, a row of key supporting and guiding
channels arranged above and intermediate said
motor, means utilizing said motork to feed the
and rods, keys arranged in said channels
key in one direction in the apparatus, means
and movable vertically between and operatively
operatively engaging said key in the last named
engaging the gears and rods, means supporting
movement thereof for opening and closingv the
circuit through said switch, said last named 20 each of the keys in raised inoperative position
above said gears and rods, each side oi the frame
means comprising a key engaging rod, a switch
having independent means for transmitting im
operating sliding rod, and a lever operatively en
gaging both rods and movable independently of
pulses to an electric circuit, gear trains placing
said spring motors in operative engagement with
said sliding rod.
1l. In an automatic telephone dialer employ 25 the last named means, an independent switch
ing a row of keys, with means for supporting said
controlling each of the last named means, and
means in operative engagement with each rod
keys for inward and outward movement with re
spect to the support, means directly operable by
controllinfr one of said last named switches.
l5. An apparatus of the class described com
actuating.r a motor to move the key in the oppo 30 prising a unit frame, said frame having a longi
site direction, an elongated rod of rectangular
tudinal gear at leach side of the frame, a rectan
one movement of any one of the keys in a row for
cross sectional form arranged longitudinally of
gular rod adjacent and longitudinally of each
gear, coil spring motors inwardly of said gears
keys,
and in
means
operative
spacedengagement
longitudinally
with
of the
all surface
of
withv means engaging the gears for winding said
of all of said keys arranged adjacent said rod 35 motors, a row of key supporting and guiding
for imparting intermittent rotary movement lto
channels arranged above and intermediatel said
said rod in the last mentioned movement of the
gears and rods, keys arranged in said channels
keys, means in operative engagement with said
and movable vertically between and operatively
rod for opening and closing an electric circuit in
engaging the gears and rods, means supporting
the intermittent rotary operations of said rod, 40 each ofA the keys in raised ino-perativeposition
and tensional means for supporting the last
above said gears and rods, each side of the frame
named means and said rod in neutral position.
having independent means for transmitting im
12. In an automatic telephone dialer appa
pulses to an electric circuit, gear trains placing
ratus, the combination with call keys having
said spring motors in operative engagement with
spaced elements characterizing predetermined
the last named means, anl independent switch
telephone numbers arranged at one end portion
controlling each of the last named means, means
of said keys, a recess in the keys inwardly oi said
in operative engagement with each rod control
elements, of a unit comprising a frame having
ling one of said last named switches, said last
spaced rows of key supporting channels at op
named means comprising a rackedy lever'engag
posite sides of said frame, yieldable means at
ing avpinion on said rod, and a switch operating
the upper portion of the frame operatively en
bar actuated by said lever.
gaging the recess portions of keys arranged in
said channels to support said keys in raised po
15. An apparatus of the class described com
prising a unit traine, said frame having a longi
tudinal gear at each side of the frame, a rectan
.
sition in said frame with all of the elements ar
ranged within boundaries of the frame, and a 55 gular rod adjacent and longitudinally of each
single member arranged longitudinally of each
gear, coil spring motors inwardly of said gears
row of keys in operative relation with the ele
with means engaging the gears for winding .said
ments of said keys for controlling transmission
motors. a row of key supporting and guiding
of predetermined telephone numbers in one move
channels arranged above and intermediate said
ment of said keys relatively to said frame,
60 gears and rods, keys arranged in said channels
13. In an automatic telephone dialer appara
and movable vertically between and operatively
tus, the combination with call keys having spaced
engaging the gears and rods, means supporting
elements characterizing predetermined telephone
each of the keys in raised inoperative position
numbers arranged at one end portion of said keys,
above said gears and rods, each side of the frame
a recess in the keys inwardly of said elements, 65 having independent means for transmitting im
of a unit comprising a frame having spaced rows
pulses to an electric circuit. gear trains placing
of key supporting channels at opposite sides of
said spring motors in operative engagement with
said frame, yieldable means at the upper portion
the last named means, an independent switch
of the frame operatively engaging the recess por
controlling each of the last named means, means
tions of keys arranged in said channels to support 70 in operative engagement with each rod control
said keys in raised position in said frame with
ling one of said last named switches, said last
all of the elements arranged within boundaries
named means comprising a racked lever engaging
of the frame, a single member arranged longi
a pinion on said rod. a switch operating bar ac
tudinally of each row of keys in operative rela
tuated by said lever, and tensional means for sup
tion with the elements of said keys for con 75 porting the lever and rod in neutral position.
2,407,889
11
12
17. An apparatus of the class described com
prising a unit frame, said frame having a longi
tudinal gear at each side of the frame, a rectan
comprising means transmitting impulses to a tel
ephone circuit in transmitting a predetermined
telephone number, a switch controlling the circuit
guiar rod adjacent and longitudinally of each
gear, coil spring motors inwardly of said gears
to said last named means, a single switch oper
with means engaging the gears for winding said
motors, a row of key supporting and guiding
alined in a row and actuated by each depressed
ating element operatively engaging all of the keys
key in upward movement of said key in control
channels arranged above and intermediate said
ling movement of said switch into operative and
gears and rods, keys arranged in said channels
inoperative positions in calling a number, all oi
and movable vertically between and operatively 10 said keys having gear rack surfaces, and means
engaging the gears and rods, means supporting
operated by the gear rack surface of any one of
each of the keys in raised inoperative position
the keys in said row for putting the second named
above said gears and rods, each side of the frame
means in operation.
having independent means for transmitting im
20. In a, key actuated telephone number calling
pulses to an electric circuit, gear trains placing 15 device employing two rows of call keys, a frame
said spring motors in operative engagement with
in which said keys are vertically movable, means
the last named means, an independentJ switch
in the frame supporting all of the keys in raised
position, independent number transmitting units,
controlling each of the last naimed means, means
in operative engagement with each rod control
one unit controlling one row of keys and another
ling one of said last named switches, said last 20 unit controlling another row of keys, each unit
named means comprising a racked lever engaging
comprising means transmitting impulses to a tele
phone circuit in transmitting a predetermined
a pinion on said rod, a switch operating bar ac
telephone number, a switch controlling the circuit
tuated by said lever, and tensional means for
supporting the lever and rod in neutral position
to said last named means, a single switch oper
and in operative engagement with the elements 25 ating element operatively engaging all of the keys
of said keys.
alined in a row and actuated by each depressed
key in upward movement of said key in controlling
18. In a key actuated telephone number calling
, movement of said switch into operative and inop
device employing two rows of call keys, a frame
erative positions in calling a number, and ten
in which said keys are vertically movable, means
in the frame supporting all of the keys in raised 30 sional means for supporting the switch operating
element in constant engagement with a key in the
position, independent number transmitting units,
upward movement of said key.
one unit controlling one row of keys and another
unit controlling another row of keys, each unit
21. In a key actuated telephone dialer, means
for supporting a plurality of keys in predeter
comprising means -transmitting impulses to a tel
mined alinement in a casing with adjacent keys
ephone circuit in transmitting a predetermined
in close proximity to each other, said keys hav
telephone number, a switch controlling the cir
ing recessed portions centrally thereof, means en
cuit to said last named means, and a single switch
operating element operatively engaging all of the
gaging all of the keys to maintain the same in
predetermined inoperative position, said last
keys alined in a row and actuated by each de
pressed key in upward movement of said key in 4:0 named means comprising spring pressed balls en
gaging the recessed portions of said keys, means
controlling movement of said switch into opera
tive and inoperative positions in calling a num
whereby in the operation of one of the keys ad
ber.
jacent keys will be automatically retained against
operation, means for returning the keys to nor
19. In a key actuated telephone number calling
device employing two rows of call keys, a frame i
mal inoperative position, and said spring pressed
in which said keys are vertically movable, means
balls in cooperation with the recessed portions of
the keys serving to move said keys and hold
the same in their iinal inoperative position.
in the frame supporting all of the keys in raised
position, independent number transmitting units,
one unit controlling one row of keys and another
unit controlling another row of keys, each unit 50
THOMAS W. MACKENZIE.
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