Xerox EP03766 User Manual
Europaisches
European
Office
Patent
europeen
Patentamt
Office
brevets
des
©
Publication number:
376
0
A2
649
©
Application
©
Date of
©
Priority:
@
Date of
04.07.90
©
Designated
DE FR GB
number:
22.12.89
filing:
23.12.88
publication
Bulletin 90/27
US 290484
of
Contracting
EUROPEAN
89313517.8
application:
States:
PATENT
©
©
©
©
APPLICATION
A61M 16/18
Cl.s:
int.
Applicant:
Hamm Moor
Weybridge
Inventor: Lancaster,
Station
34
Exeter
Inventor:
Lamb
36
Chagford
Inventor: Quick,
11 Forcefield
Cullompton
Representative:
al
BROOKES
52/54
London,
Dentsply
Road
Devon
Alderton,
Park
Devon(GB)
&
Holborn
High
WC1V
Lane Addlestone
Surrey
Topsham
EX3
William
Road
Devon
Woodcraft,
MARTIN
6SE(GB)
Limited
KT15
2SE(GB)
Adrian
ODS(GB)
W.
Peter
T.
EX15
1QB(GB)
High
Charles et
David
Holborn
House
© Anaesthetic
©
vaporizers
device
being
be
side-by-side.
follower
cam
M
cam
<
activate
interlocking
devices
CO
vaporizers
CO
safety
r>
hose to
CO
Q.
anaesthetic
An
which
activated at
used
which is
which is
follower
pins
is activated,
lock connector
an
vaporizer
is
provided
prevents
one
with
any
interlock
The
adapted
used
connected
is
which
devices,
closed
in
a
anaesthesia
interlock
utilizes
than
The
of
device
be
to
activate
to
a pair
with
one
position.
is
having
received in
apparatus
which
more
time.
number
to
interact
when
thereby locking
which
apparatus.
system
a plurality
interlocking
an
one vaporizer
interlock
vaporizers
the
of
Also
used for
device
comprises
vaporizer.
cranks
of
on
pins
the
interlocking
all the
provided
connecting
and connector
of
from
can
mounted
a cam
rotating
a
The
which
adjacent
other
is
a
anaesthetic
for
40d 36
44
37/4I
80/
apparatus.
^3
47
38
48
46
Xerox
Copy
Centre
EP 0 376
649 A2
ANAESTHETIC
invention relates to
The
and
aesthesia machine
or connecting
Anaesthesia
xolley on
nedical
3xide and
Anaesthetic
soflurane
carrier
a
nitrous-oxide
the
liquid
chines
vaporizers.
metered amount
a
patient breathing
vaporizers
that the
so
series of
anaesthetic
lar
more
equipment
that
connected
same
various
order to
operated
patent
describe
terlock
specifications are
"plug-in"
fication
used
to
a
need for
adapted
administration
able
facturer,
prises a
aesthesia,
the
to
establish
machines
the
gas
dial
by-pass,
(where
maining
particularly
more
tubing
equipment
which
such
gases
associated
agents
commonly
are
such
gas
through
anaesthetic
Conventional
commonly incorporate
Each
contain different
may
same
surgical
agent
than
more
time. In
interlock
specifications
arrangements
1385670,
system
gas
While the
vaporizers
valve
opening
flow
setting.
the
vaporizer on
one
does, however,
than
one
the
to
order
prevent
the
at
such
one
vaporizers
in
administration
vaporizer
a
for
use
system.
construction
varies
the
most
canister
valve
means
means
the
vaporizer
include
may
of
a
in
the
Part of the
without
anaesthetic
portion
of
VAPORIZER
to
vaporizers
to
an
mounted
are
as
pressure
such
as
a vaporizer
agent.
anaesthesia
vaporizer
of anaesthesia
circuit
equipment can
operations
desired.
vaporizer
administration
gas
to
systems
more
same
Nos.
interlock
described in these two
satisfactory
described in
there is at
for
use
circuit.
interlock
with
more
from manufacturer
common
including
and
for
adjusting
valve in the
vaporizer
entering
the
gas
INTERLOCK
anaesthesia
interlock
and
anaesthesia
typically
cylinders containing
oxygen,
as
administered
air
or
oxygen
apparatus
two
is
arranged
fresh
or
anaesthetic
to
supply
The
the
lead
to
could
with this
cope
have
than
one
time. For
2052271
system.
with the
least
connecting
There
system
than
of
commercially
type
reservoir
a
rotatable
a
the valve
concentration
a rotary
vaporizer
in accordance
flow
gas
the
vaporizer
is
located),
flow
passes
SYSTEM AND
machines
devices
locking
air and nitrous-
regulating
halothane
which
or more separate
vapor
gas
be
arrangement
same
the
accidentally
been
vaporizer
example,
U.K.
one
one type
of
vaporizer
dial
passes
for
devices
machine.
consists of
valves.
and
by passing
with
mixed
contains
ma-
or
to
dispense
into the
line. These
agents
used for
the
particu-
anaesthetic
possible
circuit at
problem,
proposed
being
U.K.
and 2193642
While the in-
patent
type
speci-
patent
other
widely
vaporizer
is,
which
dial
levels.
for
to
while the
units
therefore,
can
of
avail-
to
manu-
com-
of the
coupled
means
Such
adjusting
divide the
with the
through
chamber
through
an-
a
of
risk
be
the
in
of
be
gas
an-
to
re-
the
CONNECTOR FOR
vaporizer
vapor.
vapor
that
so
concentration
5
the
gas
control of
cams
interlock to
an
ro
is
opened
particular
from
switch
passing
is
outlet
lock
a
a
a
improved
20
two
lock
apparatus
for anaesthetic
25
comprise
tion into
male
such connectors
and
30
(generally
is made
described
sleeve
35
nectors
can
severe
invention to
40
securing system
connection
tional
lock
45
which,
vents
right
comprising
so
member
lar,
member
together
for
chamber for saturation
The
is then
the
gas
carrying
gas
line is effected
a separate
and
a pivoting
when the
setting
being
is
closed,
into the
of the
such
Many
between two
only
is
It
an object
interlock
plurality
or a
The
present
hose connector
of the
a
a
member.
international
Commonly
stainless
of
in GB-A-1 396096,
housed
One
problem
is accidental
be
appreciated,
problems.
connection
Accordingly,
system
activation of
on
activation
the
or
invention also
The
and
female
is
with
reception
ANAESTHETIC
which is
flow
gas
combined
leaves
of anaesthesia.
insure
and
rotated to
thereby
vaporizer
interlock
of
invention
invention.
breathing systems,
tapered,
correspondingly
The size
standards.
the
metal
within
provide
but
allowing
for
use
of
of the
left
externally
an
an
connection
provided
the male
of the
with the
the
anaesthesia
an
by
on/off
lever
that
rotary
to
prevent
any
vaporization
is closed.
systems
vaporizers.
this
of
system
vaporizers.
for
hollow
covered
are
male member
steel)
of
or
a plastic
which
can
disconnection
this
can give
is
It
an
hose connector
a
serving
for
disconnection.
and
the invention
with
one
number
any
activated
provides a
internally
member
with
member, an
of the female member,
end
vaporizer
are provided
the outlet
setting
precluding
invention
which
also relates
use
Typical
male member
and
and
plastic
to
a plurality
tapered
tapered,
APPARATUS
anaestnesia
by
saturated with the
by-pass
carrying a
introduction of
The
into the
vapor
valve
outlet
adjusted
the
when the
chamber
provide
can
with the
hose
internally
degree
by
is
the female
comprise a
may
housing.
occur
rise
object
prevent
comprises
of the
of
vaporizers
vaporizer.
male
in which the
collar
A
pair
to
of the
adjustment
any gas
to
provide an
be
to
anaesthetic
connectors
for
tapered
of
various
made of
material
with
and,
to
the
of
accidental
and
rapid
of
vaporizers,
hose connector
generally
which
annular
switch.
dial is
simple
a
flow
gas
set
fresh
under the
of
rotary
as
serve
vaporizer
to
any
dial
on/off
from
when the
inter-
an
used with
safety
a
example,
inser-
for
fe-
of
taper
national
metal
member
as
or,
metal
such
con-
clearly
potentially
vaporizers
connection
as
present
having a
dis-
inten-
inter-
an
pre-
the
to
tubu-
male
defines,
recess
and
2
:P
376 649
0
A2
wall of the
inner
he
least
it
of the collar
snd
female
he
sxternal
the
n
The
jaratus
by means
us
An
'aporizers
)f
vapor
said
sach
means
:am
he
vapor
;iated
Jevice
vhen
nterlock device
sngages
said
cam
stantially
otatable
said
sprung
sliding
laving a
which
distal end
in
slot
sliding
contact
:ing
nactivated,
abutting
sliding
by
ers,
cooperate
ment
the
of
ment
its
of
the
vaporizer
tion,
followers
ciated
means
The
the
ing
ingly,
be
easily
tus.
The
platform
a
mounting
circuit.
nection
sealing
mounting
which
helical
one
member
or
lugs
collar.
invention
which hose
in
of the connector
anaesthesia
for
into
a
vaporizer
for
concentration
with each
which
prevents
another of
notch
a
follower
Z
shaped
about
crank
second
bar;
a
end
first
is rotatable
said second
of
second
a
bars
having
with
and
contact
bar
on
action
with each
means
cam
followers
cam
with its
while
associated
associated
such
in
position
notch to
closed.
invention
interlock
interlock
the
installed
vaporizer
portion
.block
Ports
are
the
with
the
ports
block.
is
adapted
collar
defining
groove
towards
pins
also
introducing
flow
gas
comprises
opening
vaporizer
the
comprises
in the
comprising
first
a
being
impinging
about
sliding
inboard
each other
outboard
with the
adjacent
the cranks
with
of the
adjustment
establish
and
rotation
lock
also
device
device
on
body
for
provided
interior
The
to
extending
fixed
the
is
provided
for
engaging
provides
connected
is
of the
machine
vaporizers
(first)
substantially
other
can
in
its
which is
connection to
to corresponding ports
mounting
plug
having a
metered
a
when
opened
rotatable
the
vaporizer,
introduced
is
an
activation
a cam
rotatable
sprung
fixed
pin,
engaged
on
second
a
crank
said first
bar;
ends
when the
ends
outboard
vaporizers.
that
so
vaporizers
moved out
be
notch
cam
any
locks
engagement
associated
provides
the
on
demountable
is
existing
is
preferably
adapted
the
in
the
of
into
a
the
recess
from
end thereof:
with
one
with the
anaesthetic
an
the
to
invention.
plurality
concentration
is
adjustment
establishing
thereby.
improved
the
of
is activated.
follower
adjustment
end
one
crank
distal end
the
in
slot
a
T
shaped
said
sprung
fixed
engaged
being
and
which
vaporizer
which
ends
The
cam
the
and
by
anaesthetic
block
sliding
when
closed,
are
the
mere
means
vapor
all the
with
adjustment
means
apparatus.
provided
to
the
platform
vaporizer
may
supply
gas
has
free
the
and
or more
groove
ap-
appara-
provided,
Asso-
interlock
vaporizer
The
which
cam,
sub-
of
a
which is
in
first
a
crank
crank
the
pin,
in
second
abut-
have
have
may
similar
of
a
follow-
bars
the
adjust-
one
of
engage-
rotation
to
open
concentra-
other
cam
its
asso-
cam
for mount-
Accord-
and
may
appara-
with
receive
supply
gas
for
con-
and
in
unit
be
a
in
bar
of
of
a
is
for
the
imilar
ication
nay
cr parts
lirectly
5
Also
rine
levice
nachine.
:omprises a
ro
ittached
1 bayonet
said
0
a locking
ng
:ollar,
75
affixed to
ug
he connector
east
Jimensions
20
25
30
35
40
50
a
55
a
on
ug
The
existing
0
aesthesia
ment
anaesthesia
/aporizers
supply
connected to
taper
vaporizer
the
rear
tem
working parts
vaporizer
system
system
vaporizer.
system
system
vaporizer.
of the
split
a
ing
chine
vaporizers
to that aescriDea
way
1385670. Alternatively,
incorporate
to
provided
of the
for
split
breathing
said
one
said
split
FIG.
FIG. 2 is
having
FIG.
bar
FIG. 2b
connections.
FIG. 2c
quarter,
FIG.
associated
FIG. 4
FIG.
of
of
FIG.
of
of
FIG. 7
invention.
FIG.
collar
FIG.
breathing
Referring
10
conventional
that the
so
a
gas
invention
connecting
The
male
collar
type
female
locking
suitable to
female connector.
collar
anaesthetic
is
1
machine.
three
machine.
2a is
mounted
of
an
a
similar
3 is
is
activated.
is
5
an
vaporizer
a
6 illustrates
an
vaporizer
a
illustrates
8
the
of
9
of the
12.
vaporizer
supply
for
use
quick
tapered
attached to
female
tube,
adapted
ring
connector
its
outer
mouth,
groove
is
adapted
front
a
illustration
an
side
plan
a
in
anaesthetic
side
is
a
supply
gas
is
perspective
a
that shown
to
without
but
illustration
an
each
with
illustration
an
in
the
illustrates
activated
activated
illustrates
invention.
illustrates
tube to
to
now
invention is
apparatus.
in u.rv raiem
the
mounting
tubular
taper
be
may
circuit.
with the
is
a quick
hoses
connect locking
locking
said
circumference
said
at
accommodate
elevational
by
view
plug-in
elevation
line
vaporizer.
interlock
the
vaporizer on
the
to
the
vaporizer
the
to
end
an
side,
a
locking
a
said
FIG. 1
anaesthetic
connect
the
to
connector
said
apparatus,
connector
female connector
to
engage
having
collar
split
precise
a
be
to
easily
view
of
sharing
side
vaporizers
showing a
fashion
machine.
of
having
view
in
Figure
interlock
an
of
an
the
of
position
system
of the
affect
of said
right
of the
affect
on
of said
left
of
view
cutaway
device
anaesthetic
anaesthesia
an
illustrated
speci-
block
connec-
connected
ma-
locking
anaesthetic
connector
having an
attached
hav-
said
split
least
at
adjacent
having
angle
least
at
attached
of
an an-
embodi-
an
on
pair
on a
vaporizer
one
conventional
of
a single
from
2b,
unit.
interlock
of the
when
interlock
interlock
the
activated
interlock
interlock
the
activated
collar
split
a
view
for attach-
machine.
having
and
one
to
at
and
one
an
of
gas
sys-
the
of
ma-
two
a
5
EP 0 376 649
A2
>
With reference
/aporizers
nore
carticular to
comprises vaporizers
:ashion
scribed in
tubular
supply
recesses
are
vaporizers
bar
the
in
mitted into
22 of the
passed, together
izer,
This
Patents
are
soon
impossible
vaporizer.
unit 8
izer. Interlock
are arranged
pin
Thus
vaporizer on
the
and
tion.
includes
notch
of
vaporizer
direct
independent
erating
demountable
stalled
for
gas.
diecast
which is
the
tially
mechanism
housing,
the
block,
connection
connector
12
than two
Referring
on
British Patent
As described
ports
bar 84
in
located in their
may
84
by rotating
left-hand
the
through
arrangement
1385670 and 2052271
In accordance
also
provided
as one
The interlock
forming a
9
10
or
in the
carrier
With reference
connecting
gas
turning
a
24 in
contact
mechanism
between
Interlock
housing
screwed
vaporizer.
independent
it
vaporizer
whether
96 is
now
is illustrated
vaporizers
to
now
FIGS. 2a and
a
supply
gas
in the
4a and
and
housing
a
locked in
be
the
vaporizer.
vaporizers by rotating
vaporizers
with
4b into the
port
is
with the
with
of the
admit carrier
to
web-like
units 8 include
to
come
soon as one
as
arrangement
the left-hand
by
the
cam
follower
cam
a rotating
Because
12.
with the
of the remainder
separate
the
the
unit
holding
or
Because
and
occupies
conveniently
can
body
of the
In
type.
of the
FIG
to
are
FIGS.
which
Specification
above-mentioned
4b
are
received in
are
5. When the
corresponding recesses,
knob 6
whereupon
carrier
essentially
an
vaporizers
mechanism
enclosure
into contact
pressing
dial 22
to
now
cam forming part
rotating
and
can
unit
vaporizer
vaporizer
8
conveniently
the
otherwise
the
the
of
and
plug-in type
FIGS. 2b
taper
the
2,
relationship
embodiment
in
an
used.
and
2b
2, 2a,
the
2b,
mounted in
are
bar 84
Carrier
invention,
interlock unit
shown
side has
FIG.
26 which
the
of the kind de-
2052271
upstanding on
corresponding
ports
position on
the
to
position
gas
vapor
from the
gas
supply
gas
described in
the
is
operated,
to
gas
is located in
on
9 and
pins
with
vaporizer
in
Figure
been
release button
the
in
clockwise
a
interlock unit 8
2b,
engages
interlock unit 8
22,
cam
of the
be made
thus
and
conveniently
the
and
to
supply
a
consists
actuating
fixed
to
interlock
only a
be
carrier
joint
unit is
vaporizer
installed between
gas
or
and
2c,
type
arrangement
the
can
the
whereby
an
each
an adjoining
is
it is
vaporizer
connector
mechanism
the
thin
of
in
and consists
of
where
and in
2c,
plug-in
Patent,
the
gas
4a and
vaporizers
opened
4b
the
supply
shown
be ad-
dial
cam
will be
vapor-
bar 84.
U.K.
as
it is
adjoining
vapor-
10 which
operated.
the
2a,
92
direc-
in
22
of dial
makes
largely
op-
as a
in-
96
carrier
of
of
body
essen-
operating
web-like
mounting
the
taper-
the
fact,
to
of
of
a
responding
body
100
nection to
5
stage
which
connection
96.
to
vaporizer
concentration
a
gas.
aesthetic
106.
is
aesthetic
12a,
struction
ment
20
canister
a
be
same
concentration
each of the
25
the
of
30
35
40
45
so
55
22. As
generally
outer
plural
the
The
21
setting
zero
21,
plate
introduce
to
circuit
level
dial 22
opposite
noted that
spective
18.
of interlock
prises
which
of which
of
44
substantially
sprung
retain
rotates
engaged
bars 36
and
a
a
a
member
body
connections
of the
vaporizer.
provided on
are
the
adjacent
in the
FIG. 2c
are generally
A
gauge
The
Sight
With
12b and
cam plate
dispensed
into the
vapor
can
surface
indicia 20
vapor
canister
indicate
to
as
mark
the
vaporizer
dial
52
established
is
With
Notch
substantially
is rotatable
which is
crank
cam
on
43, respectively
supply
gas
shows further
of the
102
is
open
of
vaporizer
the
to
in the
reference
coupled
to
notch
comprises cam
and
tray
tube
vaporizer.
12c is
dial
14
containing
and the
gas
the anaesthesia
of
vaporizers
concentration
be
seen,
disk-shaped
18.
engraved
concentration
14 includes
the
lished
estab
of indicia
counter-clockwise
22
vaporized
FIGS. 1
(See
displayed by
pointer
reference
each
24 in its circular
24 is
adapted
device
engaged
T
shaped
32
follower
fixed
in slot
46 which
having
vaporizer
shows the
and
anaesthetic
108 shows
to
to
The
is closed.
by
21
cam plate
around fixed
at
pin
47 of
ports aligned
in
a platform part
Tapered
the
mounting
vaporizer
circuit.
features
conventional but
to
degree
is
normally
filled
is
FIG. 3 each of the
of conventional
a
22. Each
line 100
particular
20 is
the
.
now
80. Interlock
Z
contact
30,
by
and
104
vapor
the
means
is determined
adjusting
each
cam
member
outer
thereon
provided
arrow or
an
the
by
aligned
The rotation
into
gas
and
setting
indicium
the
FIGS 3
to
dial
receive
to
shaped
follower
in slot 37
34 which
crank
in notch
26
distal end 48 of
sliding
comprise
which have
tubular connectors
the
calibrated to
agent
adding liquid
operating
the amount
concentration
vaporizer
anaesthesia
for
of machine
vapor
plate
having a
surface
corresponding
by
vapor
vaporizer.
opens
patient
a
The
9).
of the
22
peripheral
sprung
pin
26,
of
point
bar
inboard ends 41
an abutting
with
98 of the
for
block
the next
to
or
of the
vaporizer
indicates the
mounting
which
by
carrier
in the
stopcock
of
vaporizers
internal
adjust-
comprises
vapor
metering
10. The
provided
the
by
cam plate
pointer
with the
- 6,
includes
cam
device 80
28,
sliding
39,
24,
46;
setting
22
dial
circular,
include
18
the
vaporizer.
concentration
When
of the
the
vaporizer
breathing
concentration
cam
20
disposed
it will be
surface
follower 26
crank
the first
and distal end
bar
impinges
helping
and
which is
and
cor-
con-
block
the
give
an-
an-
con-
to
the
by
dial
is
to
indicia
the
arrow
cam
plate
a re-
com-
32,
end
36;
on
to
which
sliding
rela-
a
4
P 0 376
649
onship
ondition,
rtiich
aporizers,
nds
nd
liased into
14.
ialanced rest
nd 46
neans
ne
iroper
/ith
lustrated
irovided
idjustable
he
ipectively.
ocation
:am
ind
ween
ind
slide
jnd 48
jar
nanner
he
ror
nove
without
arly,
:o
sxertingany
when it
ster 12,
the
out
illustration,
vaporizer
when
eled
26b
bottom
the
32b rotates
causes
forcing
downward
stantially
30b
distal
move
system
when
outboard
may
44 and
T
shaped
Springs
may
associated
sliding
abutting
the
sliding
embodiment
on
extensions
outboard
into
22 of
dial
the
In
46
are
crank
bar 46,
slide
46.
bar
of crank
and
36
that
cranks
example,
the
to
exerting
when
the left,
In the
is desired
the
desired
notch
of
12b
cam
edge
slide out
to
surface
movement
distal
sliding
T-shaped
counter-clockwise
in
a
end
the
to
reference
With
80a
and
Cam
controls
motion
48b,
associated
the
similar
abut
slots 37
48
respectively
crank
the
position
and
110
position
optionally
therewith
bars
may
relationship
bars
inboard
ends
follower
out
or
associated
an
illustrated
spring
and
32
and between
Distal
34
47 of slide
slot
ensures
when
crank
right,
any
crank 32
crank
force
on
operation
operator
position,
24
(See
assumed that
it is
(See Fig.
is
22b
56b of
notch
23b
of
cam
clockwise
44b to
end
bar
of
and
right.
associated
vaporizer
ends 40
30
112
for
of
end
40a and
of
of
a
embodiment,
loaded
slide
end
are
that
the
crank
force
causes
34
slide
of
to
merely
which
rotated
of
of
36b to
cam
crank
consequently
now
and
sliding
and
respectively.
shown
have
be
adjacent vaporizers.
adjustable
41 of
sliding
respective
44 of
engaged
movement
32
moves
activate
FIG.
2).
24b
notch
cam
follower 26b,
on
with
bars
47 for
of
if
provided
are
crank 34.
a length
which
by
adjusted
with each
sliding
42a
bars
26 is
adapted
vaporizer
maintain
to
bar
the motion
34
anaesthetic
between
36,
crank 32
46
bar
causes
moves
slide bar
on
slide bar
in
46.
bar
an
turns
forces
4).
the
Referring
counter-clockwise,
permits
24b and
dial
fixed
to
move
left.
the
follower
34b to
motion,
FIG.
to
vaporizer
in
is
an
42
respectively
adjacent
on
receiving
sprung
Fig.
slide bar
in slot
For
operator
22b. Because
rotate
sliding
crank
Crank
3
by spring
to
assure
Sliding
extension
are
36
notch
respectively
of the
slot 47
anaesthetic
cam
pin
the
26b
5,
bars 36
adjustment
the
length
to
ensure
other
bar
36,
provided
and 46
for
24 in
12.
slide bars
tension
crank
36
and
37 of
of
only one
slide bar.
bar
slide
in slot
right
36.
36
to
without
machine 10,
dial
cam
follower
purposes
activates
FIG.
to
now
follower
cam
slide
sprung
28b
left, thereby
Similarly,
causes
fixed
on
which
causes
bar
interlock
the
12a to
In the
on
distal
32
32 is
a
of
a
and
is
38
and
on
re-
recip-
the
36
be-
34
and
distal
slide
in
of
46
to
37
Simi-
move
can-
22
to
26
of
4,
bev-
under
of
crank
which
the
sub-
pin
46b to
the
ot
ngnt
lock,
locked
the
which
i
clockwise
26a
relationship
ers
removed
o
returns
and
vaporizer
vaporizer
5
ner
the
condition
case
o
in
movement
the
T-shaped
wise
!5
to
forcing
10
J5
to
45
so
55
lower
long
displaced
cannot
follower
left has
may
invention
porizers.
vaporizers
system
equipment.
of the
and to
recess
member
action,
of
web-like
the
unit
mount
ment
cordingly,
on
invention
tor
a
vaporizer
preventing
because
right,
causes
to
push
each
to
to
Because
46a
as vaporizer
In
a slightly
left of
of
vaporizer
cam
leftward movement
direction
push
cam
26c
as
return
26b
The
the
be to
Accordingly,
The
when
vaporizer
provide
which is
the
the
vaporizer
top
may
the
or
existing
With
which
the movement
caused
from
notch
to
that
12a
when
dial
against
sliding
motion
can
invention
of
space
part
be
without
by
sprung
fixed
on
further into
of
sliding
other, cam
notch
24b.
of the
the
right,
could theoretically
affected
is
12a.
different
vaporizer
vaporizer
22c takes
of
sliding
34c
crank
on
follower
cannot
bars
condition,
to
returned to
is
of
exact
left of
the
interlock
be
may
mounted side-by-side
It is
only
housing
the
interlock
the
interlock
between
of the
replaced
vaporizer
providing
interlock
the
anaesthetic
reference
also
provides
prevents
uaustss
i<iu,
its
operation.
motion
the
crank
28a,
pin
notch
bars
follower
24a
movement
interlock
the
in
manner,
12b is locked
12b is
12c,
locking
place
36c
bars
of
rotate
to
fixed
pin
32c at
crank
into notch
26c
removed
be
36c
and
sliding
their
original
slide bars
effect
same
vaporizer
interlock
the
any
the
has
readily
necessary
to
valve
capable
unit.
unit is
and
preferably
vaporizer
a
by
singly
unit
apparatus.
to
now
a safety
inadvertent
vctpun^ci
Vaporizer
of
sliding
of
sliding
32a
to
causes
24a. Because
each
on
26a cannot
until
cam
slide
of
be to
exactly
sliding
30c,
and 46c
notch
advantage
adapted
accept
operating
of
independent
the
spacer
an
the
vaporizer
in
turned
of
cam
when
and 46c,
bar 36c,
in
a
causing
contact
from
bars
position
24b.
and
36c
on
any
12c.
mechanism
desired
to
the
receiving
Apart
occupies
mounting
housing.
if
anaesthetic
in
interlock
be
can
FIGS 7
lock
disconnection
rotate
of the
system
counter-clock-
remain
number
to
modify
from
easily
-
i^a iu
12a is
36a
bar
bar 46b,
counter-
follower
cam
of the
vaporiz-
follower
bars
of
the
right
man-
same
12c, to
inactivated
an
In the
on.
follower
leftward
the
caused
causes
crank
39c,
point
Cam
24c.
24c
notch
in their
and
36c
until
46c
to
vaporizer
of
of
standard
that
interlock
an
anaesthetic
in
the
interlock
with
wheel
the
locking
inter-
this
of the rest
a
block and
The interlock
desired
is
it
equip-
feature.
installed
the
9,
present
hose
connec-
of
to
be
26b
36a
any
of
26c
by
34c
fol-
as
46c
cam
the
that
the
va-
top
unit
a
thin
to
Ac-
the
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