close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2109577

код для вставки
March 1, 1938..
L. A. POLITIS
2,109,577
SPINAL ADJUSTMENT APPARATUS
Filed April 9, 1956
2 Sheets-Sheet 1
Mgg,
March l,
[_A A. POU-|15
2,109,577
SPINAL ADJUSTMENT APPARATUS
Filed April 9, 1936
2 Sheets-Sheet 2
2,109,577
Patented Mar. 1, 1938
UNHTED STATES
rATI-:T ' ortica
2,109,5'7 7
SPINAL ADJUSTMENT APPARATUS
Leon A. Politis, North Adams. Mass., assigner to
C. W. Ransom, Pittsfield, Mass. and himself
Application April 9, 1936, Serial No. 73,551
13 Glaimsl (Cl. 12S-69)
This invention relates to certain new and use
ful improvements in spinal adjustment appara
tus.
An object of the invention is to provide a
5 mechanical device for reducing or removing a
for determining horizontally swinging adjust
ments of the laterally extending arm;
Figure 9 is a fragmentary side elevational View
of the upper end of the standard; and
Figure l0 is a fragmentary side elevational
luxation of the spinal vertebrae.
Another object of the invention is to provide a
spinal adjustment apparatus that may be set
View showing the indicator associated with the
inner pivoted end of the head of the apparatus.
whereby an operator may make an adjustment
with a stroke having a definite and predeter
drawings and particularly Figure 1, the reference
mined direction and magnitude.
A further object of the invention is to provide
apparatus of the foregoing character whereby
the operator may repeat with precision the forces
15 applied in a given treatment, the apparatus being
capable of adjustment whereby the direction
and the magnitude of the forces as required may
be varied.
A further object of the invention is to provide
20 apparatus for spinal adjustment in which the
adjustments may be made with extreme rapidity
having an arm i6 projecting laterally of the
Referring more in detail to the accompanying
character l5 designates a standard or support 10
upper end thereof, the arm it carrying a head
Il at its free end and from which head il, a
plunger or contact member I8 depends.
The standard l5 comprises a tubular member
I9 having an enlarged base 2@ that carries a plate
2l to facilitate mounting of the tubular member
i9 upon the work table, bench, door or other
support.
Y
The arm i6 comprises a tubular elbow deñned 20
by a horizontal arm 22 and a depending tubular
and in a manner whereby the applied. pressure
leg 23 that telescopes into the tubular member
is completely removed instantly after reaching
the maximum, thereby permitting the innate
25l forces to determine the ultimate position of the
effecting vertical adjustment of the tubular leg
vertebrae.
'
With the above and other objects in view that
will become apparent as the nature of the in
vention is better understood, the saine consists
30 in the novel form, combination and >arrange
ment of parts hereinafter more fully described,
shown in the accompanying drawings and
claimed.
In the drawings:_
35
.
Figure l is a vertical longitudinal sectional
View of the spinal adjustment apparatus;
Figure 2 is a fragmentary horizontal sectional
view taken on line 2_2 of Figure 1, showing de
vices for accomplishing an angular adjustment
40I of the head and also rotary adjustment thereof;
Figure 3 is a cross-sectional View taken on line
3_3 of Figure l;
Figure 4 is a cross-sectional view taken on line
4_5 of Figure l;
45
Figure 5 is a detail sectional view taken on line
5_5 of Figure l of the plunger or contact mem
ber;
Figure 6 is a detail sectional view taken on line
5_5 of Figure l, showing the cam and clutch
device for the operation of the drum upon which
the operating cable is wound;
Figure 7 is a horizontal sectional View taken on
line '1_'1' of Figure l;
Figure 8 is a fragmentary plan view of the up
per end of the standard, showing the indicator
i 9 of the standard I5.
Means is provided for
23 in the tubular member I9 with devices for
indicating such adjustment and as shown in
Figures l, and 7 to 9, the upper end oi the tubular
member i9- is fashioned to provide a clamp and
a support for a pinion, the clamp construction
comprising a pair of semi-circular strap mem
bers 24 and 25, the latter comprising a section 25
hinged thereto as at 2l with cooperating lugs 28
and 29 projecting from opposite ends of the strap
members 24 and 25. A length of semi-circular
rack teeth 3Q extends partly around the side of » '
the tubular leg 23 to be engaged by a pinion 3i
carried by a pin 32 journalled in the lugs 28,
the pinion being operated by the handle 33 on
the pin 32. When the tubular leg 23 has been
properly adjusted relative to the tubular mem~
ber I9, the hinged clamp member 'it carried by
the strap 25 is tightened by the screw 34 threaded
through the lugs 29 and operated by the handle
35, the clamp member comprising the straps 24
and 25 being moved into binding engagement
with the tubular leg 23. To determine the length
of vertical adjustment of the tubular leg 23 in
the tubular member i9, the leg 23 adjacent its
upper end is provided with circumferentially eX
tending gage. lines êiâ shown more clearly in Fig' VO
ure 9 with which the arrow or indicator 3l at
the upper end of the tubular member i9 is asso
ciated. To determine angular adjustments in
the horizontal plane of thelarm 22, a graduated
dial 38 shown more clearly in Figures l, 8 and 9 -'
2
2,109,577
is carried by the end of the arm 22 extending
over the leg 23, the indicator associated with the
dial comprising a rod 39 having a pointer 4I!
cooperating with the» dial, the rod being carried
by a ring 4I rotatable upon the upper end of the
leg 23 with the lower end of the rod 39 extending
through guide members 42 carried by the tubular
member I6 for restraining the rod and indicator
48 against movement during horizontally swing
ing movements of the arm 22. The indicator rod
39 extends downwardly between the clamp lugs
29 as shown in Figure l7.
The arm I5 embodying the horizontal arm sec
tion 22 also includes an arm section 43 that tele
scopes in the arm 22 and as shown in Figures 1
and 2, the arm section 43 is both rotatable and
longitudinally adjustable relative to the arm 22
with means for holding the two arms in ad
justed position. A clamp member 44 is located
at the free end of the arm 22, being hinged to
the arm as at 45 and bindingly engaged with the
arm 43 by means of the clamping screw 46.
Cross-gage lines 41 are formed on the arm 43 as
shown in Figure 2 and with which the indicator
finger or arrow 48 carried by the arm 22 cooper
ates for determining rotary and longitudinal ad
justment of the arm 43 relative to the arm 22.
As shown in Figure l, the arm 43 is of tubular
formation and the end thereof projecting from
30 the arm 22 is enlarged and cut away to provide
a support substantially U-shaped in cross-sec
tion, having a bottom wall 49 and side walls 50
as shown in Figure 3, outwardly offset exten
sions 5I being carried by the side walls 5U as
shown in Figures 2 and 4. The head I1 carry
ing the contact member or plunger being pivot
ally mounted between the wall extensions 5I for
adjustment to various angular positions.
The head I1 comprises a block body 52 carry
40 ing a receptacle 53 at the upper side thereof with
a removable cover 54 and a pair of legs 55 pro
jecting from a side wall of the receptacle 53 for
pivotal mounting between the side wall exten
sions 5l. A pinion 56 is formed on the inner
face of the free end of each side leg 55 of the
casing 53 and a pin 51 extends through the pin
ions 58 and keyed thereto legs 55 and side wall
extensions 5I for the pivotal mounting of the
head I1. A rack bar 58 is slidably mounted upon
50 the bottom wall 49 of the support at the outer
end of the arm 43 and normally extends beyond
the bottoni wall for engagement with. the pin
ions 55. Angular adjustments of the head I1
are accomplished by moving the head on the
55
pivot pin 51, this action causing the pinions 56
to slide the rack bar 58 between the side walls
50 of the support and to hold the head I1 in its
shifted angular position, means is provided for
arresting movement of the rack bar 58. As
60 shown in Figures 1 to 3, the rack bar 58 is pro
vided with a longitudinally extending slot 59
through which the screw pin 68 extends, one end
of the screw pin threading into an opening in
a side Wall 5I! of the support, the opposite side
wall 56 having a slotted opening therein to ac
commodate the mounting of a clamping bar 6I
that is engaged with the rack bar 58 and through
which the screw pin 5E! extends. A collar 62 is
carried by the pin 58 for engagement with the
70 clamping bar 6I for moving the same into bind
ing engagement with the rack bar 58 and to
clamp the latter against movement between a
side wall 58 of the support and the clamping bar.
An operating handle 53 is carried by the screw
75 pin 66. The degree of angularity of the head
I1 and contact member I8 is shown on an indi
cator (see Figures 2, 4 and l0) comprising a
pointer 64 carried by a projecting end of the pin
51 and cooperating with a circular series of
graduations 65 on the adjacent side wall exten
sion 5|.
A part of the operating mechanism for the
plunger or contact member I8 is carried by the
head I1 and casing 53 thereof and as shown in
Figures 1 and 2, the body portion 52 of the head
il is provided with an axial bore 66 through
which the plunger rod 51 rotatably and slidably
extends.
The upper end of the shaft 61 is nor
mally disposed midway the upper and lower ends
of the casing 53 with a pair of grooved wheels 68
and 69 ñxed thereto in vertically spaced relation,
the upper terminal end of the shaft 61 having
a disk 10 ñxed thereto above the grooved wheels
68 and 69. The shaft 61 is normally held at its
limit of upward movement by means of the coil v
spring 1I extending between the disk 1I) and
the top wall 54 of the casing 53. A thrust move
ment is adapted to be imparted to the shaft 61
and contact member I8 carried thereby and also
a partial rotary movement, the shaft 61 being
initially rotatably set and then rotated to zero
position during the thrust movement imparted
to the shaft. As shown in Figure 1, the upper
end of the shaft 61 has a key socket 12 therein
that receives the key end 13 of a shaft 14 that 30
projects through an opening in the top wall 54
of the casing 53 with a disk head 15 upon the
upper end of the shaft 14 that carries a pointer
18 working over a dial on the top face of the
casing cover 54. The operating means for im 39 C1
parting thrust movement to the shaft 51 includes
a cam 'I'I fixed to a shaft 18 journalled in bear
ings 19 in the head casing 53, the cam being
engaged with the disk 1I) as shown in Figure 1
for limiting upward movement of the disk and
shaft 61. A coil spring 8D extends between the
shaft ‘I8 and wall of the head casing ‘53 for
normally holding the cam 11 in the position
shown in Figure l.
The contact member I8 as shown in Figures 1
and 5 comprises a tubular member 8| having a
key 82 at one end to be received in a key socket
83 in the lower end of the shaft outwardly of
the block body 52 of the head I1 and to be re
tained therein by a spring clip 84. A stem 85 ß‘î
slidably projects through an opening in the low
er end of the tubular member 8I and carries a
cushion block 86 for body contact at its lower end.
The inner upper end of the stem 85 carries a
block 81 provided with lateral pins 88 project- »
ing through side slots 89 in the tubular member
8| to prevent rotary movement of the block 85
relative to the tubular member, the stem 85 and
block 81 carried thereby being normally held at
their limit of lowered movement relative to the
tubular member 8| by means of a coil spring 90
within the tubular member that is interposed be
tween the block 81 and ñoatingr block 9|, midway
the ends of the tubular member. A relatively
stronger thrust spring 92 is arranged in the up
per end of the tubular member 8| between the
upper closed end thereof and the floating block SI
and is of the desired pressure or tension for im
parting a predetermined thrust, figured lin
pounds, to the cushion block 86. It is to be un
derstood that a plurality of contact members I8
is provided with thrust springs 92 of various ten
sion so that the desired thrust pressure may be
imparted to a cushion block 86.
Thrust movements may be imparted to the
2,109,577
Shaft 61 by electrical, pneumatic or hydraulic
3.
verse process on the atlas, and therim-Ofthe.
atlas between the spinous process and either
means and for purposes of illustration, mechani
cal devices are shown and as illustrated in Figures
1, 2 and 6, a. cable drum 93 is journaled in the
transverse process; and the spinous processßo'f
enlarged base 20 of the standard I5, the drum 93
The person to be treated is placed on a table
having a cable 94 wound thereon that extends up
wardly through the standard I5, overa pulley 95
at the upper end of the standard to be directed
through the arm I6. The cable 94 extends under
10 a guide pulley 96 journalled on a shaft 9‘I that
extends between the side wall extensions 5I as
shown in Figure 2 and over a guide pulley 98 car~
ried by the shaft 57, the free end of the cable S4
being attached to a bar 99 slidable in a guide mi!
within the head casing' 53. A cross-head IUI is
carried by the forward end of the slide bar 99,
the cable |92 attached to one end of the cross
bar IOI passing partly arcundv the grocved wheel
68 and anchored thereto .While the cableY |03 at
tached to the other end of the cross bar IBI pass
es around the opposite side of thegrooved Wheel
B9 and is anchored thereto. A cable or- cord‘ |04
is attached at one end to the inner end of the' slide
bar 99, the same passing over a pulley |05 and
a. attached at its other end to the »grooved wheel
|06 secured to the shaft ‘I8 for rotating the shaft
'I8 and cam 'Il carried thereby against the ten-v
sion of the spring 8i). The operating means for
the cable drum 93 includes a pedal bar Il'l'l piv
30' oted Within the enlarged base 20 of the standard
I5 and projecting througha slotted opening Ißîi
in a side Wall of the base, the inner end of the
pedal bar IU'I being pivotally supported upon a
shaft |09 that supports the cable drum and hav
ing a cam portion I I9 engaged with a cam mem
ber III for effecting movement of the cam IIB,
carrying clutch teeth H2 inte engagement with
clutch teeth I|3 on the adjacent end of the
cable drum 93. The pedal bar |91 is returned to
40 its normal position after operation by means of
the coil spring IIßl and said cable drum 93 is re
turned to its normal position by means ofthe
spring I I5 associated therewith as shown in Fig~
ure
1.
'
'
‘
While the apparatus disclosed herein is capa
ble of adjusting the entire vertebrae system of
the spinal column, the same has been primarily
designed. to eifect adjustment of luxations pres
ent in the atlas and axis at the end of the spinal
1 column and at the base of the skull. In the prac
tice of chiropractic or adjustment of the spinal
column of the human body such treatments have
heretofore been made by hand to free the im
pinged nerves that cause deranged functions.
» -. When the hands are alone used, to accomplish
such adjustment, it is impossible to impart the
exact desired thrust in precisely the direction re
quired to remove the displacement of the articu
lar joint or vertebrae. The apparatus disclosed
in this application is designed to impart the ex
act degree of thrust pressure necessary to over
come an impingement and also to impart the de
sired twist simultaneously with the thrust ac
tion. While any of the vertebrae of the spine
`may become displaced, and may even cause- a
the axis.
.
-’
»
'
vor other support and the apparatus adjusted' with'4
the cushion block 85 engaged Withthe 'determined'
part of the body and the .desired pressure of’ïsuch „è y
engagement is determined bythe 'mark-or .indi-LV
Gator 85a on the plunger stem 85 as shown-1in 10
Figure l that moves upwardly into the-lower end
of the tubular member 8| with the blockdZl-‘I~ -on
the upper end of the stem causing a compression
of the relatively weak spring 99. The apparatus!
is adjusted-as to height and angularity and when 15
it is desired to impart a partial revolution’ to the
cushion block 3_6, simultaneously with >thrust
movement imparted. thereto, theA shaft 61 is par~Y
tially' rotated to the desired degree I»by ther disks
head 15011 the upper endof the smallerz'sliaft“ 205
74:' The rotatable adjustment of the~ ‘shaft'ßïlî
reduces fslackjin oneof the cables“ |92 orf'Illt‘A
and increases slack in the other cable. When
thel cable drum es is operated by the pedal' m1,;
the came s4 that has the Cable 'm4 attached 25A
thereto operates the cam 'I'I against the tension ~
of the spring 8D to lower the disk ‘I0 rand shaft
67 by thrust movement, the taut cable 'I02‘or
|93 simultaneously effecting a partial revolution
of the shaft 61 and contact' member I8 carried
thereby. The shaft 51 and contact member I8"
are lowered with a snap-thrust movement to
effect the; adjustment on the vertebrae pf ,the
patient vand the springđII immediatelyl elevates
or restores the shaft Gland contact member. i8
to its normal position and atthis time, the flat
side of the cam 'I'I isengaged with the edgeof
the disk ‘I0 and the shaft ä'I returned. by: rotation
to its zero position during thrust movement,
To re-set the contact member, the hand lever»v 40A Í
II6 shown in Figure 2 as projecting through a
Wall of the casing 53- and- pivctally ~mountedî
therein as at |I'I .has the leg I|8 thereof enr',k
gaged with a lug projection IIs on the disk î'ilÍ
whereby the disk may be manually lowered by,
the re-set lever IIB to position the disk 'Iil below
theV engaged flat face of the cam ‘Il whereupon
thespring 80.rotates the shaft 'i8 Vand cam .to
restore the same to the position shown in Figure l.
It will be noted that precise adjustments may
be repeated and be exact as to thrust torque and
direction, or any of these factors varied by any
desired `degree to be determined by the .gages
associatedwith the adjustable elements. , By the.’
reading of an X-rayV photograph, or'by other
means of diagnosis, the several gages of the ap
paratus may be initially set to give the required
adjustment, the patient being definitely located
relative to the apparatus.
Also the apparatus
may be arranged in duplicate so that simultane
ous adjustments may be made on both transverse
processes, one transverse process and the spi-`
nous, or any two'points of a given vertebrae, or
on a point on one vertebra and a point on the
adjacent vertebra.
ì
'
curvature, it is believed thatnerve impingement
isl caused primarily by subluxations or displace
ments of the ñrst and second cervicals, known
respectively as the atlas and the axis, adjoining
Fromthe above detailed description of the in
vention,` it is believed that the construction and
operation thereof will atonce be appa1‘ent,-and
the base of the skull. The present invention was
preferred embodiment of the invention, it is nev~`
ertheless to be understood that minor changes
may be made therein Without departing ‘from>
therefore designed for adjusting the atlas and’
axis. The apparatus may be adjusted for thrust
and torque contact with various points on either
cervical. The points of contact preferred for
'f use in most cases are the right and left trans->
55
While there is herein shown and described the
the spirit and- scope of the invention as claimed.
l. In a chiropractic machine, a standard, a
65-
f
4
2,109,577
horizontal arm having a leg vertically and rotat
ably adjustable in the standard, the arm com
prising rotatably adjustable telescoping sections,
a head having a horizontal pivotal connection
with the outer end of the arm and a tensioned
thrust member depending from the head and de
tachably connected thereto.
2. In a chiropractic machine, a standard, a
horizontal arm having a leg vertically and ro
10 tatably adjustable in the standard, a head ad
justably carried by the outer end of the arm and
a thrust member depending from the head,
means for imparting a thrust and rotative move
ment to the thrust member, including a cam en
15
gaged with the thrust member and a manually
operable cable having branches respectively en
gaged with the cam and thrust member.
3. In a chiropractic machine, a standard, a
horizontal arm having a leg vertically and ro
20.
tatably adjustable in the standard, the arm com
7. In a chiropractic machine, a standard, a hor
izontal arm having a leg vertically and rotatably
adjustable in the standard, a head adjustably car
ried by the outer end of the arm and a thrust
member depending from the head, means for im
parting a thrust and rotative movement to the
thrust member, and the body engaging part of
the thrust member being detachably engaged with
the latter, a manually operable cable operatively
connected with the thrust member, a tensioned 10
winding drum for the cable, a cam and clutch de
vice for rotating the drum and the connections
between the cable and thrust member including
a pair of grooved wheels fixed on the upper end
of_ the thrust member and a pair of auxiliary ca
bles attached to the aforesaid cable and respec
tively attached to- the two. grooved wheels and
wound thereon from opposite directions for im
parting reverse directions of rotation to the thrust
member.
'
'
20
prising rotatably adjustable telescoping sections,
, >8. Ina chiropractic machine, a standard, a
a head having a horizontal pivotal connection
With the outer end of the arm and a thrust mem
horizontal arm having a leg vertically and rotat
ably `adjustable in the standard, a head adjustably
carried by the outer end of the arm and a thrust
member depending from the head, means for im 25
parting a thrust and rotative movement to the
thrust member, including a cam engaged with
the thrust member and a manually operable cable
operatively connected with the cam and thrust
member, the horizontal arm including an ad 30
ber depending from the head, means for im
parting a thrust and rotative movement to the
25. thrust member including a powered cable oper
atively connected to the thrust member, and the
body engaging part of the thrust -member being
detachably engaged with the latter.
4. In a chiropractic machine, aV standard, a
30 horizontal arm having a leg vertically and ro
tatably adjustable in the standard, a head ad
justably carried by the outer end of the arm and
a thrust member depending from the head, and
means for imparting a thrust and rotative move
35 ment to the thrust member, the horizontal arm
including adjustably rotatable and extensible tel
escoping sections, the head being pivotally sup
ported on the outer section and the thrust mem
ber being axially and rotatably movable in the
40 head.
5, In a chiropractic machine, a standard, a
horizontal arm having a leg vertically and rotat
ably adjustable in the standard, a head adjust
ably carried by the outer end of the arm and a
thrust member depending from the head, means
for imparting a thrust and rotative movement to
the thrust member, including a cam engaged with
the thrust member and a manually operable cable
having branches respectively engaged with the
50 cam and thrust member, the horizontal arm in
cluding an adjustably rotatable and extensible
section, the head being pivotally supported on the
extensible section and the thrust member beingl
axially and rotatably movable in the head.
6. In a chiropractic machine, a standard, a hor
izontal arm having a leg vertically and rotatably
adjustable in the standard, a head adjustably car
ried by the outer end of the arm and a thrust
member depending from the head, means for im
60 parting a thrust and rotative movement to the
thrust member, including a cam engaged with the
thrust member and a manually operable cable
operatively connected with the cam and thrust
55
member, a tensioned winding drum for the cable,
65 a cam and clutch device for rotating the drum
and the connections between the cable and the
cam and thrust member including a cable exten
sion from the aforesaid cable attached to the cam,
a pair of grooved wheels ñxed on the upper end
70 of the thrust member and a pair of auxiliary ca
bles attached to the aforesaid cable and respec
tively attached to the two grooved wheels and
wound thereon from opposite directions for im
parting reverse directions of rotation to the thrust
75 member.
justably rotatable and extensible section, the head
being pivotally supported on the extensible sec
tion and the thrust member being axially and
rotatably movable in the head, a tensioned wind
ing drum for the cable, a cam and clutch device
for rotating the drum and the connections be
tween the cable and thrust member including a
pair of grooved Wheels fixed on the upper end of
the thrust member, a pair of auxiliary cables at
tached to the aforesaid cable and respectively at 40
tached to the two grooved wheels and wound
thereon from opposite directions for imparting re
verse directions of rotation to the thrust member
and another auxiliary cable connecting the first
named cable to the cam engaged with the thrust 45
member.
,
9. In a chiropractic machine, a standard, a
horizontal arm having a leg vertically and rotat
ably adjustable in the standard, a head adjustably
carried by the outer end of the arm and a thrust 60
member depending from the head, a cable oper
atively connected with the member for imparting
a thrust and rotative movement thereto, and thel
body engaging part of the thrust member being
detachably engaged with the latter, the horizontal 55
arm including an adjustably rotatable and ex
tensible section, the head being pivotally support
ed on the extensible section and the thrust mem
ber being axially and rotatably movable in the
head, a tensioned winding drum for the cable, a 60
cam and clutch device for rotating the drum and
the connections between the cable and thrust
member including a pair of grooved wheels fixed
on the upper end of the thrust member and a
pair of auxiliary cables attached to the aforesaid
cable and respectively attached to the two grooved
wheels and wound thereon from opposite direc
tions for imparting reverse directions of rotation
to the thrust member.
l0. In a chiropractic machine, a standard, a
horizontal arm vertically and rotatably adjust
able in the standard, a head adjustably carried
by the outer end of the arm, a thrust member
depending from the head and rotatable and re
ciprocable therein, a cable extending through the 75
5
2,109,577
standard and arm, a manually operable ten
sioned drum at the lower end of the standard
upon which one end of the cable is wound, and
the other end of the cable having branch exten
sions operatively connected with the thrust mem
ber for imparting thrust and rotative movements
thereto.
11. In a» chiropractic machine, a standard, a
horizontal arm vertically and rotatably adjust
able in the standard, a head adjustably carried
by the outer end of the arm, a thrust member
depending from the head and rotatable and re
ciprocable therein, a cam engageable with the
upper end of the thrust member, a cable extend
15 ing through the standard and arm, a manually
operable tensioned drum at the lower end of the
standard upon which one end of the cable is
wound, and the other end of the cable having
branch extensions operatively connected with the
thrust member and cam for imparting thrust and
rotative movements thereto.
12. In a chiropractic machine, a standard, a
horizontal arm vertically and rotatably adjust
able in the standard, a head adjustably carried
by the outer end of the arm, a thrust member
depending from the head and rotatable and re
ciprocable therein, a cable extending through
the standard and arm, a manually operable ten
sioned drum at the lower end of the standard
upon which one end of the cable is wound, the
other end of the cable having branch extensions
operatively connected with the thrust member for
imparting thrust and rotative movements there
to, the branch connections between the cable and
thrust member including at least two cables
wound on the thrust member respectively in op
posite directions and normally having slack
therein, and said thrust member adapted to be
manually rotated for placing one of the branch
connections under the desired tension for varying
the degree and controlling the direction of ro
tation of the thrust member during operation"
thereof.
13. In a chiropractic machine, a standard, a
horizontal arm vertically and rotatably adjust
able in the standard, a head adjustably carried
by the outer end of the arm, a thrust 'member
depending from the head and rotatable and re
ciprocable therein, a cam engageable with the `
upper end of the thrust member, a cable extend
ing through the standard and arm, a manually
operable tensioned drum at the lower end-of the ,
standard lupon which one end of the cable is
wound, the other end of the cable having branch ‘
extensions operatively connected with the thrust
member and cam for impartingr thrust and rota
tive movements thereto, the branch connections
between the cable and thrust member including
at least two cables wound on the thrust member
respectively in opposite directions and normally
having' slack therein, and said thrust member
adapted to be manually rotated for placing one
of the branch connections under the desired ten
sion for Varying the degree and controlling the o
direction of rotation of the thrust member dur
ing operation thereof.
y
LEON A. POLITIS.
Документ
Категория
Без категории
Просмотров
0
Размер файла
913 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа