Automatic Tire Setting Machine.
Year: 1898

page_text: Date of Application, 31st May, 1898-Accepted, 27th Aug., 1898
COMPLETE SPECIFICATION.
Automatic Tire Setting Machine.
I, CHARLES ARTHUR ALLISON, of 52, Chancery Lane, London, in the County of
Middlesex, Patent Agent, do hereby declare the nature of this invention, which has
been communicated to me from abroad by Tire Setting Machine Company, a cor-
poration duly incorporated and located at Lime Rock, Connecticut, United States
of America, and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:-
My invention has for its object to produce an automatic power machine for
setting tires on vehicle wheels which will work equally well upon light and
heavy wheels and whether the wheels are large or small or new or old and
whether the tires are new or have been worn thin from long continued use.
With these ends in view I have devised the novel automatic power machine of
which the following description in connection with the accompanying drawings
is a specification reference characters being used to indicate the several parts."
Fig. 1 is a plan view of the machine complete, the operative parts being in
position to set a tire.
Fig. 1 an enlarged detail view showing in connection with Figs. 1 and 3 a
device for strengthening the attachment of the inner ends of the straps to the
frame.
Fig. 2 a front elevation the position of the parts corresponding with Fig. 1.
Fig. 2 an enlarged detail view of the outer forming plate.
Fig. 2 an enlarged detail view of the device for locking the clutch operating
lever after adjustment.
Fig. 3 a horizontal sectional view on an enlarged scale on the line - in
Fig. 2.
Fig. 3 a perspective view of the inner wedge.
Fig. 4 an enlarged detail view partly in vertical section on the line
vin
Fig. 5 illustrating the automatic tripping mechanism by which the action of the
toggle is controlled.
Fig. 4 a detail sectional view on the line p-p in Fig. 4.
Fig. 5 a detail plan view partly in horizontal section on the line y-y in Fig. 4,
the scale being reduced showing the stopping and starting lever which is tripped
automatically by the mechanism illustrated in Fig. 4.
Fig. 6 a sectional view on the line ww in Fig. 5, the starting lever and one
of the tripping levers being omitted.
Fig. 7 an elevation as seen from the front in Fig. 5, the starting lever being
in section.
Fig. 8 an inner face view showing the section of the sectional band which for
convenience in description I shall term the first section.
Fig. 9 an inner face view showing short sections of the band.
Fig. 10 a section of the band and straps on the line z-z in Fig. 9, one of the
rests being in elevation.
Fig. 11 a plan view of one of the rests with the clip in horizontal section.
CD 077

page_text: so as to hold them perfectly. tight. In order to prevent the straps from curving
or bowing outward under the enormous strain to which they are frequently..sub-
jected in use I provide in addition to the lugs 9 which engage the plates of the
frame a central support which is clearly shown in Fig. 3, in addition to which
see Fig. 1. 13 denotes a plate which is riveted to the outer strap and carries
lugs 14 to which a brace rod 15 is pivoted. In the present instance I have
shown lugs 14 as cast upon a plate 16 which is itself riveted to plate 13. These
details of construction however, are not of the essence of my invention. The free
end of the brace rod is threaded and extends forward see Fig. 3, and lies between.
lugs 17 (one only being shown in the drawing) which are cast upon one of the
webs 3 between the plates of the frame. A nut 18 on the threaded portion of the
rod bears against the inner face of the lugs and when tightened up thrusts
the brace rod against the center of the straps and renders bowing of the straps at
their point of attachment to the frame impossible.
In use the wheel and the tire that is being set thereon are supported by rests. D
the construction of which will be clearly understood from Fig. 10. Each rest
comprises a clip having a head 19 which rests upon the straps and sectional band
a body 20 which partly incloses the straps and band and a plate 21 which lies
within the band and is provided on its underside with a lug 22. 23 denotes
a slide adapted to move upon plate 21. In the present instance I have shown the
slide as inclosing the edges of the plate which form ways upon which the slide
moves. Upon the underside of the slide is a lug 24 and a hand screw 25 which
passes through lug 24 and engages lug 22. In use the slide is forced against the
sectional band by means of this screw as clearly shown in Fig. 10 thereby ciamp-
ing the band and the straps tightly together and locking the rest in place. The
felly of the wheel and the tire are both supported by the slide as clearly shown
in Fig. 16. Any number of these rests may be used and they may be placed
intermediate the ends of the sections of the band or may be placed as in Figs. 1
and 9 at the point of engagement of two sections to hold the ends of both sections
in place.
Where a rest is used at the point of engagement of two sections the slide is
not moved up very tightly and will not interfere with the endwise movement of
the sections while at the same time it will retain their ends in place. In addition
to the rests D I have in the present instance shown a fixed rest 26 upon the
first section of the band. I have also, see Fig. 8 shown upon the first section
of the band one rest D permanently attached thereto. This special rest which for
convenience I will designate by D is provided on its inner face with a plate 27
which is shown as riveted to the first section and as secured to the rest. by. a
screw 28 engaging the head 19. The rest D¹ is additionally secured to the first
section by means of lugs 29 on the section which engage the sides of the rest.
In the present instance I have shown lugs 29 as formed upon a plate 30 which is
riveted to the first section and the end 30" of which extends beyond the end of
the section so as to bear against the inner face of the contiguous section and
hold it in place. This construction permits the rest to be readily placed in posi-
tion or removed if necessary as will be readily understood from Fig. 8. in which
however, the end of the contiguous section is not shown as the engagement..of
the ends of the sections is clearly shown in Fig. 9. 31, see Fig. 11, denotes
springs the action of which is to separate the permanent sections of the band as
soon as pressure thereon is relieved, it being understood of course that the pres-
sure exerted in setting a tire which moves the sections of the band endwise
toward each other is against the tension of these springs and that as soon as the
pressure is relieved these springs will act to separate the sections again so that
the wheel may be readily removed. One end of each spring is riveted to a
section of the band as clearly shown in Fig. 11, the other end bearing against the
body of one of the clips. It will be noted in Figs. 1 and 11. that the sections of
the band are provided at each end with a spring bearing against the body of one
of the clips. At the end of the first section of the band opposite to clip D¹ and

page_text: adapted to be forced against the straps by means of arms 52 which carry at one
end a nut 53, the other ends of said arms being pivoted to a lug or lugs 54 upon
plate 46, see Fig. 2 in connection with Figs. 2 and 3. 55 denotes a hand screw
which engages the nut, the ends of said screw being unthreaded and turning
freely in two of the webs 3 of the frame. One end of the hand screw is pro-
vided with a head 56 which bears against the outer face of one of the webs, the
other end being provided with a hand piece 57 for convenience in operation. It
will be seen that rotation of the hand screw in one direction will force the
inclines backward over the web 3 which they engage thereby relieving the
inward pressure of one end of the outside forming plate upon the straps and will
simultaneously move the other end of said forming plate outward thereby re-
lieving the inward pressure of that end of the forming plate upon the straps, and
that rotation of the hand screw in the opposite direction will draw the inclines
forward over the web which they engage and thus force that end of the outside
forming plate inward against the straps and will simultaneously by means of the
arms 52 engaging lugs 54 force inward the opposite end of said forming plate
thereby causing the straps and the sectional band to conform accurately to the
curvature of the tire that is to be acted upon.
This
The compressive action of the straps upon the band and tire is produced by
means of a toggle H one end of which is connected to the frame and the other
to a sliding carriage I. This toggle consists essentially of upper and lower
blocks 58 and 59 which are engaged by a right and left threaded screw 60, and
links 61 the ends of which are pivoted to blocks 58 and 59 respectively and to
blocks 62 and 63 which are bolted respectively to the frame and to the sliding
carriage. It will be readily understood from Figs. 2 and 3 that when the screw
is rotated, the blocks 58 and 59 being engaged respectively by the right and left
threads of the screw, said blocks will be moved toward or from each other and
will act by means of the links to force the sliding, carriage outward in com-
pressing a tire upon a wheel or to draw the carriage inward when it is desired
to relieve the pressure upon a tire. The sliding carriage is provided with
grooves 64 which engage ways 65 upon the upper and lower plates of the frame,
see Figs. 1, 2 and 3. The straps pass through a tapering opening 66 in the
carriage in which they are locked by means of inner and outer wedges 67 and 68.
The shape of the inner wedge will be clearly understood from Fig. 3.
wedge in the direction of its length presents a convex curve on one face as at 72
and a straight taper on the other face, and is provided with shoulders 69 which
are adapted to engage the outer face of the carriage at the top and bottom of
opening 66 to limit the inward movement of the wedge and with lugs 70 which
engage the tops of the straps, see Fig. 3. These lugs act as guides to hold the
wedge level and prevent it from dropping down when the straps are loose. I
also provide wedge 67 with handles 71 for convenience in inserting and removing
it. The shape of outer wedge 68 will be readily understood from Fig. 3. This
wedge presents a concave curve on its inner face as at 73 to correspond with the
convex curve upon the corresponding face of the inner wedge. These curves of
the wedges act in use to bend the two outer straps slightly and give an absolutely
rigid hold of the wedges upon the straps. 74 denotes cars upon the outer wedge
between which is pivoted an oscillatory block 75. J denotes a yoke which is
pivoted to the sliding carriage and K a frame extending outward from one side
of the yoke and rigidly secured thereto. The straps see Fig. 3 pass between
rollers 76 and 77, roller 76 being journaled in the frame and roller 77 journaled
in a slide 78 which is adapted to move on ways 79 on the frame. The slide is con-
trolled by a hand screw 80 which engages the head 81 of the frame and the inner
end of which is pivoted to turn freely in the slide as at 82. The shafts of these
rollers extend upward through the frame, the shaft of roller 77 passing through a
slot 83 in the frame, and carry pinions 84 which are adapted to mesh when the
slide is moved inward to clamp the straps as in Fig. 15. The shafts of both
rollers are provided with squared ends 85 to adapt them to receive a crank 86

page_text: pinion 101 which turn on the shank of the toggle screw and that pinion 101 will
communicate motion to gear wheel 104 which turns on shaft 100 but that
shank 60 and shaft 100 will both remain stationary. When slow speed of the
toggle is desired as in setting a tire the operator by means of clutch lever 111
places clutch member 108 in engagement with clutch member 105 thereby com-
municating motion to shaft 100 and by means of pinion 99 and gear wheel 98
to the toggle screw. When the relatively fast speed is desired as when releasing
the pressure of the straps upon a tire the operator places clutch member 107 in
engagement with clutch member 103 thereby communicating motion directly to
the toggle screw, both shaft 100 and gear wheel 104 now running idle. The outer
end of shaft 118 is squared as at 106 to receive a crank, for example crank 86.
Should it be required at any time to move the parts without the application of
power or even to set tires without power the operator is enabled to do so by
applying the crank to the squared end of shaft 118, the proper clutch being
manipulated to give the desired speed, the same as when the machine is driven by
power, or if preferred the machine may be operated by applying the crank to the
squared ends of either shaft 100 or the shank 60° of the toggle screw as already
stated.
120, see Fig. 4 in connection with Fig. 1, denotes a holding plate which in
use is turned down upon the hub of the wheel to be operated upon. This plate
is shown as secured to a carrier 121 by means of a ball and socket joint 122
The carrier is socketed in a head 123 and is held against rotation therein by
means of a rib 124 which engages a corresponding groove in the head. The
carrier and the holding plate are raised and lowered by means of a hand
screw 125 which engages a threaded opening in the carrier and is held against
vertical movement in the head as clearly shown in Fig. 4. The head is secured
to a horizontal rod 126 by means of a sleeve 127 which extends outward from a
bracket 128. The end of rod 126 passes through the sleeve and the bracket and
carries a cross pin 129, see Fig. 4^, which is adapted to engage slots 130 in the
bracket. The sleeve may be oscillated on the rod to carry the holding plate out
of its operative position as shown by dotted lines in Fig. 1, as when placing a
wheel in the machine or removing it. 131 denotes a spring partly socketed in
sleeve 127 and bearing against a collar 132 on the rod. The action of this spring
is to hold the cross pin in engagement with one of the slots 130 as may be
required to retain the holding plate either in or out of its operative position.
Rod 126 is adjustable in a sleeve 133 pivoted as at 134 to an arm 135 itself
pivoted as at 136 to a plate 137 having legs or webs which rest upon the frame
and which is secured to the frame by a bolt 138 the head of which is countersunk
in the plate as clearly shown in Fig. 5. It will be noted that by making hori-
zontal rod 126 adjustable in sleeve 133 and pivoting the latter to arm 135 I am
enabled to place the holding plate in position to engage the hub of any wheel the
machine may be required to operate upon, whether large or small. 139 denotes
a housing on plate 137 which is provided with a slot 140 through which arm 135
passes and with a recess 141. A hand screw 142 passes down through the housing
and the end thereof bears upon arm 135. The pressure upon the lever is regu-
lated by a tension spring 143 one end of which bears against the cap plate of the
housing and the other against a nut 144. This nut is provided with a rib 145
which engages a corresponding groove in the housing and holds the nut against
rotation so that rotation of the hand screw will raise or lower the nut thereon and
either increase or decrease the tension of the spring and consequently the pres-
sure of the hand screw upon arm 135. 146 denotes a tripping lever adapted to be
operated upon by holding plate 120, arm 135 and the intermediate connections
and 147 denotes a tripping lever adapted to be operated upon by the toggle.
These tripping levers are fulcrummed between ears 148 on plate 137, the por-
tions of said tripping levers forward of their fulcrums lying in slots in the
plate and flush with the surface thereof as will be understood from Figs. 5 and 6,

page_text: wheel is placed uppermost and as soon as pressure is applied to set the tire the
hub will be forced upward thus giving greater dish to the wheel. An instant
after arm 135 has been lifted into position to engage set screw 160 in tripping
lever 146 the tilting of said lever will tilt the corresponding hand tripping
lever 149 downward and will release the starting lever throwing the latter to its
intermediate position as in Fig. 5 and stopping the operation of the toggle
mechanism. Should great pressure be required upon a wheel in order to set a
tire firmly thereon while imparting but little dish to the wheel, this result is
accomplished by increasing the tension of spring 143 thereby increasing the pres-
sure of hand screw 142 upon arm 135 so that the holding plate will retain the
hub downward until the required compression has been given to the tire, and
also turning down set screw 160 in tripping lever 140. When it is desired to
remove a wheel the starting lever is swung toward the right as seen in Fig. 7 and
is placed in engagement with the right angular shoulder 152. This movement
through oscillation of shifting rod 156 will cause belt pulley 117 to be rotated in.
the opposite direction and will consequently move toggle blocks 58 and 59 away
from each other and relieve the pressure of the straps upon the wheel. As soon
as the straps are loosened sufficiently, which is determined by the adjustment of
set screw 161 in tripping lever 147, this tripping lever is tilted by the engagement
of lug 162 with set screw 161 and in turn trips hand tripping lever 150 thereby
releasing the starting lever, which is thrown by the spring back to its normal
position, oscillating the shifting rod and again stopping the movement of the
toggle mechanism. It will of course be apparent that the hand tripping levers
may be operated at any time should it be required to stop the machine or be
preferred for any reason not to use the automatic tripping mechanism
In Figs. 16, 16 and 17 I have shown a hand device for regulating the dish of
the wheels which may be used at any time in lieu of the automatic mechanism
just described either when the machine is being run by power or by hand. The
horizontal piece 34 of extension leg E is provided with a slot 36 as already stated.
164 denotes a screw the head 165 of which will pass freely through
this slot. 166 denotes a plate having an opening 167 through
which head 165 will pass freely and a slot 168 leading therefrom
which will just receive the shank of the screw but not the head, so
that the screw will be locked to the extension leg by the plate as clearly indi-
cated in Fig. 16. 169 is a hand nut adapted to engage the upper end of the
Screw. In use after the wheel has been placed in position the screw is passed up
through slot 36 and through the hub of the wheel, plate 166 is placed in position
as in Fig. 16 and the hand nut is screwed down as far as may be required to give
the required dish to the wheel. It will of course be apparent that the nut will
rest upon the hub and that plate 166 will drop down below the extension leg as
in Fig. 16. As the straps are tightened about the tire the hub will be lifted and
will move upward until the plate is in engagement with the extension leg.
While the parts are in this position the required amount of pressure may be
imparted to set the tire without increasing the dish of the wheel.
The operation of the machine as a whole is briefly as follows:
Figs. 1, 2 and 3 illustrate practically the act of setting a tire, the wheel
appearing in dotted lines in Fig. 1, and the sectional band being closely in
contact therewith although in Fig. 2 both pairs of clutch members are shown out
of engagement. So far as these views are concerned the parts may be assumed
to be in position to commence the act of setting a tire, or the setting of a tire
may have been completed or the toggle mechanism may have
been stopped during the setting of a tire. Supposing the parts to be
in this position and that it is desired to set a tire upon another wheel of the same
size, the operator swings starting lever 155 toward the right as seen in Figs. 5
and 7 which oscillates shifting rod 156 and transmits power to shaft 118 and to
pinion 101 on the shank of the toggle screw, the parts being locked in this posi-
tion by the engagement of the starting lever with the corresponding shoulder 152.

page_text: operating mechanism whereby the movement of said mechanism to tighten the
straps is stopped automatically.
50. The combination with the frame, and the straps, of the sliding carriage, the
sliding frame, the toggle and toggle operating mechanism carried by the frame,
and mechanism actuated by contraction of the toggle to stop the toggle operating
mechanism automatically.
51. The combination with the frame and the straps connected thereto, of the
sliding carriage having an opening through which the straps pass, a wedge
having a straight and a convex face adapted to lie between the straps, a wedge
having a correspondingly concave face engaging the outer strap by which said
straps are locked to the carriage, the sliding frame and a toggle thereon by which
the carriage is moved in either direction to tighten or loosen the straps.
52. The combination with the frame and the straps, of the sliding carriage, the
sliding frame, the toggle, and fast and slow speed toggle operating mechanism
carried by the sliding frame.
53. The combination with the frame and the straps, of the sliding carriage, the
sliding frame, a toggle, fast and slow speed toggle operating mechanism and a
driven shaft carried by the sliding frame, and clutch mechanism whereby power
may be transmitted to either the fast or slow speed toggle operating mechanism.
Dated this 31st day of May 1898.
ALLISON BROS.,
Agents for the Applicant.

page_text: inward to clamp the straps between the rollers rotation of said rollers will tighten
or loosen the straps.
25. The combination with the frame, the straps connected to the frame, the
carriage and the yoke pivoted thereto, of a frame carried by the yoke, a roller 76, a
slide in said frame carrying a roller 77, screw 80 by which the slide may be
moved inward, and pinions on the roller shafts which engage when roller 77 is in
operative position.
26. The combination with the frame, and the straps, of the sliding carriage
having an opening through which the straps pass, a yoke pivoted to the carriage,
inner and outer wedges by which the straps are locked in the opening and a screw
carried by the yoke which operates the outer wedge.
27. The combination with the straps and the carriage having an opening
through which the straps pass, of a yoke pivoted to the carriage, a wedge 68
adapted to lock the straps in the opening, a block 75 pivoted to the wedge and a
screw 87 carried by the yoke which passes through the pivoted block and engages
the carriage, rotation of said screw acting to move the wedge in or out.
28. The combination with the straps and the carriage having an opening
through which the straps pass, of a yoke pivoted to the carriage, a wedge having
lugs 74, a block pivoted between said lugs and having a threaded opening, and a
screw carried by the yoke which passes through the opening in the block and
bears against the carriage.
29. The combination with the straps and the carriage having an opening
through which the straps pass, of a yoke pivoted to the carriage and having a
rounded socket and a tapering opening 92, a wedge 68 carrying a pivoted block
having a threaded opening through it and a screw which passes through the open-
ing in the block, bears against the carriage and is provided with a rounded boss 90
which engages the correspondingly shaped socket in the yoke.
30. The combination with the straps and the carriage having an opening
through which the straps pass, of a yoke pivoted to the carriage, a wedge 67
having a straight taper on one side and a convex curve on the other which is
adapted to lie between the straps, a wedge 68 having a concave curve adapted to
engage the outer strap and mechanism carried by the yoke for operating wedge 68.
31. The combination with the frame, the straps secured thereto and the toggle,
of the sliding carriage having an opening through which the straps pass, and
wedges 67 and 68 having respectively convex and concave faces by which the
straps are locked in the sliding carriage.
32. The wedge 67 having shoulders 69 and lugs 70, the outer face of said
wedge being a convex curve.
33. The combination with the straps and the carriage having an opening
through which the straps pass, of a yoke pivoted to the carriage, a wedge 67
which is convex upon one side, is adapted to lie between straps and is provided
with shoulders 69 adapted to engage the outer face of the carriage and a wedge 68
having a concave curve which engages the outer strap in the opening in the
carriage.
34. The combination with plates 1 and 2 having grooves 10 and steel blocks
cast into said plates at the ends of the grooves, of the straps having lugs 9
adapted to engage said blocks, the sliding carriage to which the straps are de-
tachably secured and the toggle adapted to act upon the sliding carriage.
35. The combination with the frame having a swivelled eye, the straps, the
sectional band, the sliding frame and the toggle, of an extension leg to support
the outer edge of the straps band and wheel that is to be operated upon, said leg
comprising a horizontal piece engaging the swivelled eye and provided with a
hinged joint to permit movement of the outer end in the horizontal plane and a
support engaging the outer end of the horizontal piece and resting upon the floor.
36. The combination with the outer strap, the frame having a web 3 and
lugs 17 upon the web, of a brace rod pivoted to the outer strap and having an
adjustable bearing on said lugs.

page_text: ing mechanism in relieving the pressure of the straps it is automatically released
and returned to its normal position by movement of the toggle the instant the
straps have been loosened to a predetermined degree.
7. The combination with the straps, the toggle and operating mechanism there-
for, of shifting rod 150, a starting lever by which said rod is oscillated in either
direction, holding plate 120 which is adapted to bear upon the hub of a wheel
that is being operated upon, means for locking the starting lever at either extreme
of its movement and for returning it to its normal position and mechanism inter-
mediate the holding plate and the starting lever whereby said lever is automati-
cally released and the toggle operating mechanism stopped when the predeter-
mined dish has been given to the wheel or when the pressure of the straps has
been relieved to the predetermined degree.
8. The combination with the straps, the toggle, and operating mechanism
therefor, of shifting rod 156, a starting lever by which said rod is oscillated, hold-
ing plate 120 which is adapted to bear upon the hub of a wheel that is being
operated upon, means for locking the starting lever at the operative position and
for returning it to its normal position and mechanism intermediate the holding
plate and the starting lever whereby said lever is automatically released and the
toggle operating mechanism stopped the instant the predetermined dish has been
given to the wheel
9. The combination with tire setting mechanism, a toggle and operating
mechanism therefor by which the tire setting mechanism is actuated to compress
or release a tire and mechanism actuated by the rise of the hub of a wheel upon
which a tire is being set to automatically stop the toggle operating mechanism
when the predetermined dish has been given to the wheel.
10. The combination with tire setting mechanism, a toggle and operating
mechanism therefor by which the tire setting mechanism is actuated to compress
or release a tire and mechanism operated by the contraction of the toggle to
automatically stop the toggle operating mechanism when the pressure of the tire
setting mechanism has been relieved to the predetermined degree.
11. The combination with the toggle, operating mechanism therefor, shifting
rod 156, a starting lever by which said rod is oscillated in either direction, springs
for retaining the starting lever at its normal position, and hand tripping levers
provided with shoulders adapted to be engaged by the starting lever to lock it
at either extreme of its movement, of tripping levers adapted to act respectively
on the hand tripping levers to release the starting lever, lug 162 adapted to
engage one of said levers when the toggle is contracted and a holding plate 120
and mechanism intermediate said plate and the other tripping lever which is
actuated by the rise of the hub of the wheel that is being acted upon whereby
the operation of the toggle operating mechanism in expanding or contracting the
toggle is stopped automatically.
12. The combination with the toggle, operating mechanism therefor, the shift-
ing rod 156, a starting lever by which said rod is oscillated, a spring for return-
ing said lever to its normal position and a hand tripping lever 150 having a
shoulder adapted to be engaged by the starting lever to lock the latter at one
extreme of its movement, of a tripping lever 147 adapted to act upon the hand
tripping lever and a lug 162 upon the toggle adapted to engage the tripping lever
when the toggle is contracted whereby the operation of the toggle operating
mechanism is stopped automatically.
13. The combination with the toggle, operating mechanism therefor, shifting
rod 156, a starting lever by which said rod is oscillated, a spring for returning
said lever to its normal position, and a hand tripping lever 149, having a shoulder
adapted to be engaged by the starting lever to lock the latter at one extreme of
its movement, of a tripping lever 146 adapted to act upon the hand tripping lever,
a holding plate 120 and mechanism intermediate said plate and the tripping lever
which is actuated by the rise of the hub of a wheel that is being acted upon
whereby the toggle operating mechanism is stopped automatically.