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Патент USA US3098908

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July 23, 1963
J. J. JAKOSKY ETAL
TELEGRAPH KEY
Filed June 5, 1961
H9. 2
3,098,898
it _ States Patent
.
"ice
3,098,898
Patented July 23, 1963
2
1
with the lever is a bifurcated yoke or rocker-arm 5 which
3,098,898
TELEGRAPH KEY
John Jay Jakosky and John J. Jakosky, In, both of
2500 West Coast Highway, Newport Beach, Calif.
Filed June 5, 1961, Ser. No. 114,959
5 Claims. (Cl. 178-408)
is pivoted at its bight so it can move either with or in
dependent of the lever. The yoke 5 brackets lever 4 and
is normally held against the lever, at bearing point ‘6,
by means of the compression of a spring 7, which exerts
pressure between the left arm of yoke 5 and the lever 4.
The compression of this spring may be adjusted by means
This invention relates to an improved dual type of tele
of screw 7 ', and held by lock-nut 7“. When at its center
rest position, the left arm of the yoke is normally held
graph key, or electric key mechanism, whose operating
lever is actuated in a horizontal plane, to make electrical 10 against a stop screw ‘8, having lock-nut 8’, by the force
contact when moved to the right or left of its center posi-_
exerted by the compression of a spring positioned between
the base and the right arm ofyoke 5. The compression
tion of rest. The prime object of the invention is to
in spring 9 may be adjusted by means of the screw 9",
provide a keying mechanism which mechanically will
having lock-nut 9".
have a de?nite center-rest position, be positive in its opera
tion and free of undesirable loose-play.
A contact point 10 is fastened to the yoke, and spaced
15
Another object of the invention is to provide a keying
from a companion contact point 10' which is fastened to
the adjusting screw 111, with lock-nut 11', supported by
mechanism which will make \a ?rm, continuous contact
the post 12. The post -12 is mounted on and electrically
without chatter and contact-bounce.
Another object of the invention is to provide a simple
insulated {from the base and is, connected ‘for conventional
operationto the _dot ‘forming circuit of the keyer. A
mechanical arrangement whereby the operating lever is
second contact point 13 is fastened to the opposite side of
precisely positioned at its center position of rest, and at
the lever, and is spaced from its companion contact point
the same time allow independent adjustment to be made
13' mounted upon the adjusting screw 1-4 with its lock
of the spring tension controlling the movement to either
the right or left.
nut 14’, and supported by the post 15. The post 15 also
Another object of this invention is to provide :a simple 25 is mounted on and electrically insulated from the base and
normally is connected to the dash forming circuit of the
mechanical keying mechanism for controlling the opera
automatic keyer. This describes the normal or center
tion of an automatic electronic keyer, which latter forms
rest position of the mechanism.
no part of the present invention.
An insulated handle or handles, of special mechanical
Another object is to provide a key having a base which
will provide maximum stability against turning moment, 30 characteristics 16 and/or ‘16', are provided, and electri
with a minimum overall weight.
cally insulate the operator from the lever. These handles,
or paddles, are usually positioned bet-ween the thumb and
Electrically, the key functions as a single pole, double
the fore-?nger of the operating hand. For 'right~handed
throw switch, whereby electrical contact may be made
with either one of two circuits.
When connected to an
operation, ‘the lever is moved to the right to form dots,
automatic keyer, in the conventional manner, the keyer 35 by exerting pressure of the thumb against handle 16’.
Movement of the lever to the left to form dashes, is ob
will automatically form dashes as long as the lever is
tained by exerting pressure of the fore-?nger against the
held to the left, and dots as long as it is held to the right.
handle 16.
‘In other words, the object of this invention is to provide
As previously mentioned, the lever and the yoke are
an electric key mechanism, or switching device, to control
suspended independent of each other for horizontal move
an electronic keyer. The keyer then automatically forms
ment and in the preferred embodiment is mounted co
the dots or dashes, in response to the movement and
axially upon the same shaft. The assembly has a stable
timing of the key lever.
center-rest position due to the pre-stressing action of
Previous keys having de?nite center-rest positions,
spring 9 holding the yoke against a ?xed stop means or
have been of ‘complicated mechanical design with one or
more of the contact points and restoring springs posi 45 stop-screw 8, and the ,pre-stressing action of spring 7
holding the lever against the anvil point ‘6 on the yoke.
tioned on the opposite side of the pivot from the handle
The contact screws 11 and 14 are adjusted so that the
where the actuating side pressures are applied to operate
lever is positioned midway between these contacts, but
the key. The inevitable loose-play in the pivot point,
not touching. When pressure is applied to handle 16 to
therefore, results in sloppy mechanical action with re
ward the left, the lever 4 moves toward the left against
sultant poor ‘keying action, especially at the higher oper
the spring 7, and contact is made between 13 and 13',
ating speeds. To overcome this very undesirable action,
without any movement of the yoke 5, but the level- when
the present invention places the restoring spring pressures,
in this position leaves the anvil point 6 on the rocker
the contact points, and the actuating side pressures, all
on the same side of the pivot or axis of rotation.
As a
arm. When pressure‘ is released on the handle, the lever
result, the injurious effects of a loose pivot and compli 55 returns to its original center-rest position due to the action
of spring 7. When pressure is applied to the handle 16’
cated mechanical linkages are greatly minimized.
toward the right, the lever 4 moves toward the right,
Other important objects of the invention will be ap
parent upon reading the following descripiton, together
simultaneously shifting with it the yoke 5, against the
action of spring 9, closing contacts 10 and ‘10', but the
with a study of the drawings showing a preferred embodi
ment of the invention.
60 yoke while in this position leaves the stop-screw .8. When
the pressure is released on the handle, the assembly of
In the drawings:
lever and yoke returns to its original center-rest position
FIGURE 1 is a general top plan view of the embodiment
due to the action of spring 9.
of the invention.
The lever ‘4 has a ?rm center point of rest by virtue
FIGURE Q is a general side view of the embodiment.
FIGURE 3 is an isometric top view of the moving 65 of the pre-stressing of springs 7 and'~9. Thus, to move the
lever either right or left Ifrom its rest position requires
mechanism, comprising the lever and a bifurcated yoke or
appreciable ‘finger pressure, so that the lever is held at
rocker-arm, and removed from the base.
The invention is described in the following speci?ca
tions and drawings; and comprises essentially, a heavy
rest against transient forces.
When the lever 4 is moved to either the right or left, to
base 1 which rests upon three frictional rubber feet 2, 70 make contact with the rigid stationary contacts, there is
2', and 2". A vertical shaft 3 is supported by the base,
a tendency for the lever to chatter or bounce against the
and pivoted on this shaft is a lever 4. Pivoted coaxial
contact, causing contact bounce. The frequency of this
3,098,898
3
4
detrimental bounce or chatter appears to be a function
of lever mass and its moment arm, spring tension, and
the side pressure against the handle; Due to the very
ment of said yoke, a spring compressed between said
yoke and said base and biasing said yoke into said ?rm
1‘
minute currents (usually measured in rnicro-amperes)
engagement with said stop, a ?rst pair of spaced contacts
mounted on said base and lever, respectively, and engage
handled by the contacts when controlling an electronic
keyer, this contact bounce often causes erratic keying.
able by moving said lever in the opposite direction, said
This condition becomes particularly aggravated as the
contacts become oxidized or dirty. To remedy this
lever having at least one ?at paddle on the end thereof
opposite said axis and made of material appreciably more
i ?exible than the remainder of said lever‘.
condition, the handles 16 and '16’ are designed to have
2. Manually operable electric key mechanism com
.a certain amount of ‘flexibility. In accordance with this 10 prising; a movably mounted key member, a movably
invention, it has been found that when the handles com
mounted stop member, means engaging said key and
prise approximately 1/3 the length of the total moving
arm, their ?exibility serves to dampen the detrimental
chattering, thereby very effectively eliminating the prob
stop members tor biasing said_key member into engage‘
ment with said stop member, ?xed stop means for limit=
ing movement of said stop member in a given direction,
lems of contact bounce, and giving a smooth, uniform 15 and means for biasing said stop member into engagement
keying action. For any given set of handles, the amount
with said ‘stop means, said members being coaxially
of ?exibility required to give the desired damping action . pivoted and elongate and extending from the pivot axis
is dependent upon the stiffness to which the springs 7
in generally the same direct-ion, said stop member com
and 9 are adjusted. For the usual stiffness to which these
prising a member having portions extending on both sides
springs are adjusted \for normal operation, the handles 20 of said key member, said ?rst biasing means comprising
should de?ect between .001 and .010 inch, when side
a spring compressed between said key member and one
pressure is applied near their outer extremity to move the
side portion of said stop member, to bias said key mem
lever to make contact to either the right or left of the
ber into engagement with the other side portion of said
center-rest position.
vstop member, said ?xed stop means being ?xed to said
The base 1 is made preferably of metal with a weight of 25 base on the same side of said key member as said ?rst bias
about three pounds to give the desired stability, to prevent
ing means, and said second biasing means comprising a
“walking” or side movement during operation of the key.
spring compressed between said :base and said other side
An excess of weight, however, is detrimental ‘as it inter
portion of said stop member.
feres with the portability of the key, and also increases
3. Manually operable electric key mechanism compris
shipping charges and the manufacturing costs. It there 30 ing; a base, a movably mounted key member, a movably
iore is very desirous to have the weight of the base posi
mounted stop member, means engaging said key and stop
tioned or placed at the most advantageous position. Since
members for biasing said key member into engagement
the side-thrusts to move the lever are applied at 16 or 16',
with said stop member, ?xed stop means for limiting
the base tends to rotate about the foot 2', and the turning
movement of said stop member in a given direction, and
moment is the product of the side-thrust multiplied by 35 means for biasing said stop member into engagement
the length of the moment arm 16-—2' or 16’— '. To resist
with said stop means; said members being coaxially
this turning moment and obtain the desired stability, there
pivoted and elongate and extending irom the pivot axis in
exists the downward pressure exerted against the feet 2
generally the same direction, said stop member compris
and 2" multiplied by the coe?icient of friction, which
ing a bifurcated yoke pivoted at its bight and bracketing
product is then multiplied by the moment arm or distance 40 said key member, said ?rst biasing means comprising a
between 2 (or 2") and the pivot foot at 2'. It will there
spring compressed between said key member and one arm
fore be seen that it is desirable to concentrate all possible
of said yoke to bias said key member into engagement
weight as far forward as possible; i.e., away from the
with the other arm of said yoke, said ?xed stop means
pivot foot 2'. Tests have shown that at least 65 percent
being ?xed to said base, and said second biasing means
of the weight of the base should be concentrated forward 45 comprising a spring compressed between said yoke and
of the mid-point, 17 of the lever 4.
said base.
An eminently satisfactory key mechanism is being
marketed embodying the present invention and having the
following parameters: Length of key lever from pivot 3
_4. Manually operable electric key mechanism com
pmsing; a movably mounted key member, a movably
mounted stop member, means engaging said key and stop
to end of handles 16, 4% inches. Distance from pivot 3 50 members for biasing said key member into engagement
to center of rear foot 2', 1/2". Weight of base 1, 3 pounds.
.With said stop member, ?xed stop means for limiting
Typical operating compression in bias springs (adjustable
movement of said stop member in a given direction, and
by screws): spring 7, 3 ounces; spring 9, 4 ounces. Pres
means for biasing said stop member into engagement with
sure to move lever to either right or left, is one ounce.
said stop means; said members being coaxially pivoted
Typical adjustment between contacts 10, 10' and 13, 13' 55 and elongate and extending from the pivot axis in gen—
(adjustable) .006 inch. All parts are metal, except the
enally the same direction, said stop member comprising
paddles 16 which are Cycolac or Tenite plastic, having
a member having portions extending on both sides of
dimensions of about .100 inch thick, one inch wide, and
said key member, said ?rst biasing means comprising a
two inches in length, overall.
spring compressed between said key member and one side
Although there has been shown and described herein a 60 portion of said stop member, to bias said key member
preferred embodiment of the invention, it is to ‘be under
into engagement with the other side portion of said stop
stood that this invention will not be limited to this par
member, said ?xed stop means being ?xed to said base
ticular description, and that changes may be made in the
on the same side of said key member as said ?rst biasing
materials, and in the structure and arrangement of the
means, and said second biasing means comprising a
parts, within the spirit of this invention and the scope of 65 spring compressed between said base and said other side
the appended claims.
portion of said stop member, there being a contact point
What is claimed is:
on the said other side portion of said stop member.
1. Manually operable electric key mechanism compris
5. Manually operable electric key mechanism com
ing a base, an elongate key lever pivoted one end to
prising; a base, an elongate key lever pivoted at one end
said base for oscillation about a substantially vertical 70 of said base for pivoting about a substantially vertical
axis, a bifurcated yoke bracketing said lever and pivoted
axis, a ?rst pair of contacts mounted respectively on said
at its bight to said base coaxially with said lever, a spring
lever and base and engageable by movement of said lever
compressed between said lever and one arm of said yoke
and biasing said lever into ?rm engagement with the other
in one direction, a second pair of contacts mounted re
spectively on said lever and base "and engageable by
arm or said yoke, a stop on said base for limiting move 75 movement of said lever in the opposite direction, means
3,098,898
5
.
for biasing said lever to a position intermediate the en
gagement positions of said contaots, said lever comprising
a relatively rigid portion at the pivoted end and a rela
tively ?exible pent-ion at the other end, said ?exible por
tion constituting approximately one third of the length 5
of said lever, said pairs of contacts being positioned on
the same side of the lever pivot.
we;~
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,445,226
2,148,028
2,323,133
Martin ______________ __ Feb. 13, 1923
Martin ______________ __ Feb. 21, 1939
Heatherly ____________ __ June 29, 1943
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