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Патент USA US2035168

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March 24,
A_ KREGUNG
2,035,168
INTERMITTENT GRIP DEVICE
Filed May 21, 1954
2 Sheets-Sheet 1
INVENTOR.
HnuLF KREELINB.
BY
-
M40140“- '
ATTORNEY.
March 24, 1936.
A, KREGLING
2,035,168
INTERMITTENT GRIP DEVICE
Filed May 21, 1934
2 Sheets-Sheet 2
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2,035,168
Patented Mar. 24, 1936
UNITED STATES PATENT OFFICE
2,035,168
INTERMITTENT GRIP DEVICE
Adolf Kregling, Stratford, Conn.
Application May 21, 1934, Serial No. 726,689
3 Claims.
Fig. 2 is a view partially in side elevation and
The present invention relates to improvements
in merry-go-rounds, particularly of the type in
partially in vertical section, and with parts
which one or more of the occupants provide the
broken away.
propelling power, and which provides amuse
5 ment, recreation and healthful exercise for
children as well as adults, the movements em
ployed in propelling the merry-go-round being
similar to those used in rowing a boat. It may
be used in the home either indoors or out, and
10 at playgrounds, beaches, etc.
An object is to provide a merry-go-round
structure of simple, and sturdy construction, and
so balanced that great force will not be required
to operate it, permitting a single child to propel
15 it while several others are riding on it. Another
object is to provide improved propelling means
in which there are no dead centers, as in the
case where cranks are used, and in which no por
tion of the stroke of the operating hand lever is
20‘ wasted, as is the case with structures employing
ratchets.
It is further proposed to provide a
merry-go-round that can be started from any
standing position by one or more of the occupants,
as at the very moment any one of the occupants
25 pulls on one of the hand levers the frame will
begin to rotate. The operator may use the full
stroke of the lever or may just nibble along with
short movements of the lever, but every pull,
7 long or short, will apply rotative power.
A fur
30' ther object is to provide a drive means which
will permit any one or more of the operators
to stop pulling and rest any time he or they
may desire, while other operators apply power
from other seats. It is also proposed to provide
35 drive means which will permit the frame to coast
from its own momentum, and during such coast
ing the hand levers will remain stationary at
any position in which they may be held, so that
the danger of injury from swinging levers is
40
(01'. ‘74-164)
eliminated.
‘
Another object is to provide safety means
which automatically disengages the hand levers
in the event that the merry-go-round is turned
backward, so that there is no danger of breaking
‘15 or jamming the mechanism.
'
’
With the above and other objects in view, em;
bodiments of the invention are shown in the‘
accompanying drawings and these embodiments.
will be hereinafter more fully described with
50 reference thereto, and the invention will be
?nally pointed out in the claims.
In the drawings:
pelling units.
'
Fig. 4 is a rear elevation thereof. ' '
Fig. 5 is a vertical sectional view thereof.
7
Fig. 6 is a side elevation showing in full lines’
the position in which the safety means becomes
operative, and showing in dot-and-dash lines 10;
an intermediate position as the lever is being
pulled in propelling direction.
Fig. 7 is a side elevation of a modi?ed form of
propelling unit.
Fig. 8 is a rear elevation thereof.
Similar reference characters indicate corre
15,;
sponding parts throughout the several ?gures of
the drawings.
'
Referring to the drawings the merry-go-round,
according to the exemplary illustrated embodi— 20
ment of my invention, comprises a pedestal or
base It], having a socket ll therein in which a
stationary post I2 is secured and supported at its '
lower end. The pedestal may be bolted or other
wise secured to the ?oor, or when used out of 25
doors may have channel iron extensions l3 se
cured to its feet M to provide a relatively wide
balanced support for the structure. A stationary
bevel gear I5 is secured upon the post l2.
_A rotary hub l6 having a bearing bushing I1 30
at its lower end is rotatably mounted on the
shaft l2 and rests on a ball bearing unit [8 sup
ported on the upper end of the pedestal ill to
provide vertical support.
A plurality of bevel
pinions l9 (four in the illustrated structure) are 35‘
mounted in the hub and mesh with the station
ary bevel gear l5, their shafts 20 being journaled
in radially disposed hub bearings 21 formed in
the side of the hub. The lower inside of the hub
forms an oil reservoir in which the bevel pinions ‘10
dip and carry oil up to be distributed to the
stationary bevel gear and to the various hub
bearings 2|, ducts 22 being provided for this
latter purpose which extend from the inner 45
surface adjacent the bevel gears to the hub bear
ings. A duct 23 also extends to the bearing
bushing IT. The gear and hub structure is
practically self-lubricating, and is also fully en- '
closed against dirt and water. To this latter 50
purpose a skirt 24 formed on the lower ,end of
the hub l6 surrounds the ball-bearings l8, and
Fig. l is a perspective view of a merry-‘go-round,
according to the exemplary illustrated embodi
55 ment of my invention.
-
Fig. 3 is a side elevation of one of the pro
’
a ?anged cover 25 is secured to the upper end of
' the hub l6 by bolts 26.
.
.
Upon the upper side of the cover plate 25 a 55
2
2,035,168
series of block portions 21 having slots 28 are
integrally formed, and to which the inner ends
of the radially extending carrier bars 29 are se
cured by bolts 30, these bars being formed of
T-iron and having the upright portions engaged
in‘the slots 28 while the horizontal top portions
seat on the upper surfaces of the block portions.
Obviously these carrier bars may be of any suit
able form.
A sleeve member 3| is secured at its lower end
10
by set screws 32 to the cover plate 25, and is
provided at its upper end with a bearing bushing
33 engaging the upper end of the post I2 and
with a head-piece 34 having a series of ears 35
16 cast thereon in which the upper ends of stay or
guy rods 36 are secured, their lower ends being '
secured to brackets 31 provided near the outer
ends of the carrier bars.
The carrier bars are
connected by tie pieces 38, preferably of angle
20 iron.
The frame thus formed is of rigid and
steady construction, effectually braced, and sup
ported in balanced rotatable relation about the
stationary post l2.
Suitable bucket seats 39 having foot rests 49
are mounted upon the outer ends of the carrier
bars 29. Obviously other seats may, if desired,
be placed on the tie pieces 38 in alternate rela
tion between the seats 39, and these latter can be
the clamping ring to instantly release, and so,
moving the hand lever forward and backward
causes rotation of the frame about the stationary
post.
Forward movement of the hand lever with re
spect to the cradle is limited by means of a U
shaped bracket 62 secured at each side of the
cradle.
In order to overcome lost motion a coil
spring 63 is provided between the lower end of
the cradle and the lower end of the lever, the 10
ends of the spring being seated in a pocket 64
formed in the part 54 of the cradle and a pocket
55 in the end of the lever.
A bracket 66 is mounted on the bearing 42
and projects in line with the cradle, where it is 16
provided‘ with an adjustable safety release or
‘stop screw 61 disposed in the path of the cam
part BI’ and adapted to contact it when the hand
lever is swung to the limit of its forward move
ment, as shown in full lines in Fig. 6, causing 20
the cam part to be pressed into releasing rela
tion with respect to the clamping ring. If, by'.
chance, the merry-go-round is pushed backwards
while an operator is holding on to the hand lever,
causing'a reverse rotation of the shaft 4| and 26
collar 45, the cam part coming into contact with
the safety release screw 61 automatically disen-'
gages the friction clamping ring from the driv
in the form of horses or other animals, auto
ing collar. The merry-go-round may be pushed
30 mobiles, or other such objects which would be at
forward or backward at any speed without danger
of jamming or breaking the working mechanism.
Another point of advantage is that the hand lever
tractive or appealing to children.
Driving or clutch shafts 4| are mounted be
neath and. in line with the carrier bars in bear
ings 42 secured to the carrier bars. A hand op
remains stationary at all times, except when the’
operators apply power.
erated clutch, presently to be more fully described
is'mounted on the outer end of each shaft, while
the inner end is connected by a ?exible coupling
43 to the pinion shaft 20, in order to make align
ment of the bearings easier, and to compensate
40 for any irregularities in the structure. A collar
35
44 secured on the shaft at the inner side of the
bearings 42 prevents longitudinal displacement
of the shaft.
The clutch comprises a driving collar 45, pref
erably of'cast iron and fastened to the shaft 4|
by a key 46. A clamping friction ring consist
ing of two half-sections 4'! and 48, hinged to
gether at 49, ?ts about the periphery of the driv
ing collar 45, the half-sections being preferably
lined with a friction metal 59 to more e?z‘ectually
grip the collar. The clamping ring may, if de
sired, be in the form of a one-piece split ring.
which ?t the shaft 4| at each side of the driv
The sides of the cradle are con
nected at the upper and lower ends by trans
verse bridge portions 53 and ‘54, the portion 53
having an adjustable bearing screw 55 therein
which bears against a lug 56 formed on the end
55 ing collar 45.
60 of the clamping ring section 41, an opposed lug
51 being formed on the end of the section 48,
and having a stud 58 of hardened metal screwed
'
,
The hand lever 59 is mounted upon a cross
65 shaft 6|! secured in the lower end of the cradle,
and is provided with an eccentrically shaped
cam part 6| disposed beneath the lug 51 in such
relation that inward movement of the lever forces
the lug 5'! toward the lug 56 and tightly grips
the clamping ring about the driving collar 45
imparting rotation to the shaft 4| and the bevel
pinion IS, the latter meshing‘ with the stationary
bevel gear l5 and causing the hub and frame to
rotate about the stationary post. Movement of
75 the hand lever in the’ opposite direction causes
’
form of clutch unit. A hardened driving collar
68 is secured to the shaft 4| by means of a key‘
69, and is engaged by a bevel-surfaced shoe 10
provided on the end of the hand lever 1 I, the lat
ter being pivotally mounted at 12 in a cradle 13 40:
having bearing hubs '|4—--‘|4 at each side rotat
ably engaged in the shaft 4| at each side of the
collar 68. A plunger 15 disposed in a tubular ex-_
tension 16 of the cradle is pressed into engage
ment with the shoe 10 by a spring 11 to take up 45
lost motion. A safety stop and release screw 18
is adjustably mounted in a bracket extension ‘I9
of the bearing 42 and is disposed in the path of
the shoe 10 to automatically release it when the
shaft is rotated backwards, acting in a similar 50
manner to the release screw 61 of the first em
. A cradle 5| has bearings 52-—52 at each side
therein.
'
In Figs. 7 and 8 I have illustrated a modi?ed
bodiment.
The operation is substantially the same as in
the first embodiment, the forward or push move
ment of the lever and cradle being free, of the 55
driving collar and the rearward or pulling move
ment gripping the collar and rotating it.
I have illustrated and described preferred and
satisfactory embodiments of the invention, but
it will be obvious that changes may be made 60
therein, within the spirit and scope thereof, as de
?ned in the appended claims.
Having thus described my invention what I
claim and desire to secure by Letters Patent is:
1. In a driving mechanism for a driving shaft 65
having a cylindrical portion, a ?xed journal bear
ing for said shaft, a cradle member pivotally
mounted on said shaft at one side of said bear
ing, clamping means surrounding said cylindrical
portion of said shaft having a pair of projected
oppositely disposed spaced ends adapted upon
being pressed toward each other to. cause said
clamping means to grip said shaft, an abutment
carried by said cradle member engaging one of
said projected ends, a lever pivotally mounted in
2,085,168
said cradle member about an axis removed from
the axis of said shaft and adapted to be moved
to and fro in gripping and releasing directions,
means on said cradle arranged to‘ limit movement
in releasing direction with respect to said cradle
and an eccentric cam portion carried by said le
ver engaging said other projected end, and adapt
ed upon movement of said lever in gripping di
rection to press said other projected end toward
10 said ?rst projected end, and upon movement in
releasing direction to permit movement of said
other projected end away from said ?rst project
ed end, and stop means carried bp said ?xed jour
nal bearing adapted at a predetermined position
15 of said cradle member to engage said lever to
press it in releasing direction.
2. In a driving mechanism for a driving shaft
having a cylindrical portion, a ?xed journal bear
ing for said shaft, a cradle member pivotally
20 mounted on said shaft at one side of said bear
ing, clamping means surrounding said cylindrical
portion of said shaft having a pair of projected
oppositely disposed spaced ends adapted upon be
ing pressed toward each other to cause said
25 clamping means to grip said shaft, an abutment
carried by said cradle member engaging one of
said projected ends, a lever pivotally mounted
in said cradle member about an axis removed
from the axis of said shaft and adapted to be
30 moved to and fro in gripping and releasing di
rections, means on said cradle arranged to limit
pivotal movement in releasing directions with
respect to said cradle, an eccentric cam portion
carried by said lever engaging said other pro
35 jected end and adapted upon movement of said
3
lever in gripping direction to press said other
projected end toward said ?rst projected end,
and upon movement in releasing direction to per
mit movement of said other projected end away
from said ?rst projected end, spring means acting
between said cradle member and said lever nor
mally pressing said lever in gripping direction,
and stop means carried by said ?xed journal
bearing adapted at a predetermined position of
said cradle to engage said lever to press it in re
10
leasing direction.
3. In a driving mechanism for a driving shaft
having a cylindrical portion, a ?xed journal bear
ing for said shaft, a cradle member pivotally
mounted on said shaft, a lever pivotally mounted 15
in said cradle member about an axis removed from
the axis of said shaft and adapted to be moved to
and fro in gripping and releasing directions,
means on said cradle arranged to limit pivotal
movement in releasing direction with respect to 20
said cradle, and clutch means cooperating be
tween said lever and said cylindrical portion of
said shaft adapted to frictionally grip said shaft
in the gripping direction of movement of said
lever relative to said cradle and to be released 25
from said shaft in the releasing direction of move
ment, movement of said lever adapted to move
said cradle about the axis of said shaft, and spring
means normally pressing said clutch means in
gripping direction, and stop means carried by said 30
?xed journal bearing adapted at a predetermined
position of said cradle to engage said lever to press
it in releasing direction.
ADOLF KREGLING.
35
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