close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2404526

код для вставки
July 23, 1946.
F, A_ G, PIRWITZ
'
2,494,526
FLASHLIGHT AND SHUTTER S-YNCHRONIZER
Filed March 28, 1944
6 Shge’cs-Sheet 1'
51153; 23, 1946.
F. A. G. Pmw?z
FLASHLIGHT AND SHUTTER SYNCHRONIZER
Filed March 28, 1944
FREQ/131m
z?w?zg
v
6 Sheets-Sheet 2
@usmv‘ INVEN
QWI‘ZIE?
TOR
A TTORNE Y
-
‘G. ¥°§RW§TZ
FLASHLIGHT AND SHUTTER SYNCHRONIZER
Filed march 28, 1%)44
ATTORNEY
5&5? 23p 3g46~ .
F. A. G. PERW'ETZ
zgméswgm
FLASHLIGHT AND SHUTTER SYNCHRONIZER}
Filed March 28, 1.944
e Sheets-‘Sheet 4
ATTORNEY
July 23, 1946.
F. A. G. PIRWITZ
2,404,526 -
FLASHLIGHT AND SHUTTER SYNCHRONIZEH
Filed March 28, 1944
6 Sheets~Sheet 5
mmmR
A TTORNE Y
July 23, 1946'
F. A. G. PlRWlTZ
2,404,526
FLASHLIGHT AND SHUTTER SYNCHRONIZER
Filed March 28, 1944
_
6 Sheets-Sheet a
F/ . /6
5 73
r
l
§
74
56‘
FRIEDRICH A . 6us TAI/ P/Rw/Tz
INVENTO v
A TTORNE
Patented July 23, 1946
2,404,526
UNITED STATES PATENT OFFICE
2,404,526
FLASHLIGHT AND SHUTTER
SYNCHRONIZER
Friedrich A. Gustav Pirwitz, Rochester, N. Y., as
signor to Wollensak Optical Company, Roch
ester, N. Y., a corporation of New York
Application March 28, 1944, Serial No. 528,422
25 Claims.
(Cl. 67—29)
1
This invention relates to a ?ashlight synchro
nizing mechanism vfor photographic shutters,
with more particular reference to the set type
shutter in which a spring-operated master lever
is cocked by a manual operation, and when re
' leased by manipulating a trigger, functions to
operate the shutter at a preselected speed, and
it has for its object to provide a shutter with a
?ashlight synchronizing mechanism that can be
used with lamps having di?erent lag character
istics, and is quickly adjustable to close a ?ash—
light circuit at any predetermined point either
before or after initiating opening of the shutter,
so that maximum light intensity is assured at the
exact moment when the shutter is fully open.
15
2
Still another object of the invention is to af
ford a simple, practical, and efficient synchro
nizing mechanism built into a photographic shut
ter and located between the usual inner and
outer annular walls constituting part of the shut
ter housing, in conjunction with a switch support
that is quickly adjustable in the housing to close
the ?ashlight circuit at different stages in rela_
tion to the shutter opening operation, and which
is movable to dissassociate the synchronizing
mechanism from the shutter mechanism and per
mit operation of the latter without affecting the
flashlight circuit.
A further purpose is to afford a single ?ash
light circuit switch which may be operated either
A further purpose of the invention is to pro
by a spring-operated synchronizing member for
vide ?ashlight synchronizing mechanism that is
lower speed lamps or by a master lever controlled
quickly adjustable to correlate accurately the lag
actuator when a high speed lamp is used with a
of any lamp with the speed of the shutter to ef—
high speed shutter, with provision for discon
fect simultaneous maximum light intensity and ‘ necting the spring-operated synchronizing mem
shutter opening, the synchronizing mechanism
ber when said actuator is used and for discon
being operated by spring means independently
necting both circuit closing mechanisms from
of the shutter mechanism so that it does not re
the master lever to permit operation of the shut
tard or a?ect the normal operation of the shut
ter without affecting the ?ashlight circuit.
ter, while at the same time enabling the syn 25 An additional purpose of the invention is to
chronizing mechanism to be set by the master
aiTord a photographic shutter ?ashlight mecha
lever of a set type shutter.
nism including a spring-operated synchronizing
Another object is to provide a set type shutter
member movable at such speed in conjunction
with a'?ashlight mechanism in which a spring
with an adjustable switch as to adapt the struc
operated synchronizing member is set by the set Ill ture for use with an instantaneous flash lamp
ting movement of the shutter master lever and
such as a “Kodatron” lamp, an “SM type” lamp
is held in set position by a locking device, while
which has a lag of about ?ve milliseconds, or
a stop moves into the path of the master lever
with a standard foil lamp having a lag of from
which, during its initial travel after release, ?rst
?fteen to twenty milliseconds or more, the mech
moves the locking device to release the synchro
’ anism being adaptable to lamps having lags vary
nizing member, and is then held for an instant
ing from instantaneous to thirty milliseconds by
by the stop which is then moved by the syn
means of an adjustment that causes the maxi
chronizing member at a predetermined instant,
mum light intensity to coincide exactly with the
whereupon the master lever completes its travel
maximum shutter opening.
10
to open and close the shutter.
An additional purpose of the invention is to
A further object is to afford a set type shutter
with a master lever and spring-operated synchro
nizing member arranged for oscillatory move
ment about independent axes, the master lever
being provided with means for engaging and
provide a photographic shutter with a built-in
synchronizing mechanism including a spring-op
erated synchronizing member, an adjustable
?ashlight circuit switch, and a retarding mech
anism connected to the synchronizing member
moving the synchronizing member to set posi
and governing its movement so that the shutter
opening operation can be delayed when the cir
holds the synchronizing member in set position.
cuit is closed ?rst and the circuit closing can
An additional purpose is to provide synchro
be delayed when the shutter is opened ?rst.
nizing mechanism that can be moved out of op in)
An additional object is to afford a photographic
erative relationship with the master lever of a
shutter ?ashlight synchronizing mechanism in
tion and also to release a locking device that
set type shutter so that the shutter can be used
without a flashlight when desired and without
support and located in the path of movement of
necessitating movement of the synchronizing
mechanism or a?ecting the ?ashlight circuit.
chronizing member whereby the circuit can read
cluding a switch carried on a quickly adjustable
an actuator mounted on a spring-operated syn
3
4
ily be closed at any selected point along the path
of travel of the actuator.
A further purpose of the invention is to provide
?ashlight synchronizing mechanism comprising
of the synchronizing member, the locking device
and retarding mechanism for the synchronizing
member being removed;
Fig. 12 is a detail view similar to Fig. 11 showing
the relative position of these parts when the syn
chronizing, member is disengaged, to permit oper
ation of the shutter without affecting the flash
an adjustable switch including contacts mounted
on an insulating block and ?exibly connected to
the shutter housing, the contacts being connected
to the two sides of a ?ashlight circuit and insu
lated from the shutter housing.
light circuit;
Fig. 13 is a detail view with the synchronizing
Another object is to afford mechanism enabling 10 member in set position as in Fig. 4, but with the
circuit ciosing switch. adjusted to close the circuit
an accurate and dependable operation when an
instantaneous lamp is used with a shutter of
highest speed, and consisting of means operated
in advance of opening the shutter to accommo
date a twenty millisecond lamp;
by the shutter master lever at a predetermined
Fig. ill is a view in elevation of a modi?cation
of the synchronizing mechanism, showing a cir~
cuit closing actuator arranged to be engaged and
point in its return travel so as to close the cir
cuit after the shutter is fully open and just be
operated directly by the master lever during the
latter part of its return movement;
fore it starts to close,
To these and other ends, the invention consists
in the construction and arrangement of parts‘
that will appear clearly from the following de 20
scription when read in conjunction with the ac
companying drawings, the novel features being
pointed out in the claims following the speci?ca
tion.
In the drawings:
25
Fig. 1 is a plan view of a shutter of the set type,
illustrating the housing with the cam plate and
Fig, 17 is a view similar to Fig. 14 showing the
position of the parts When the last mentioned
cover in position, and showing a preferred em
actuator and the spring-operated synchronizing
bodiment of the invention;
Fig. 2 is a side elevation of the same;
Fig. 3 is a plan view of the mechanism with the
cam plate and cover removed, illustrating the
Fig. 15 is a similar view showing the position
of the parts when the master lever engages the
circuit closing actuator and moves it to circuit
closing position;
Fig. 16 is a detail view in elevation of the cir~
cuit closing actuator shown in Figs. 14 and 15,
and
member are both disengaged from the master
30 lever to permit operation of the shutter without
affecting the ?ashlight circuit.
The invention is disclosed as embodied in a
photographic shutter of the set type such as ap
position of the parts with the shutter closed, the
pears in my earlier Patents Nos. 2,331,568 and
master lever and spring-operated synchronizing
member in normal or starting position, and the 35 2,331,569, dated October 12, 1943, and it will be
understood that such features of the invention as
?ashlight circuit switch adjusted to zero position
are not necessarily dependent upon a shutter of
for a lamp having no appreciable lag;
the set type may be applied to other forms of
Fig, 4 is a view similar to Fig. 3 showing the
shutters.
position of the parts when the master lever and
In the photographic flashlight ?eld at the pres
synchronizing member have been moved to set
position and are ready for operation upon move
ment of the releasing trigger, the ?ashlight cir
cuit appearing in diagram;
Fig. 5 is a partial plan view of the synchroniz
ing mechanism, showing the position of the parts
when the master lever has been released by the
trigger for initial return movement, the synchro
4 nizing member has been released by the master
lever, and the master lever has moved into en
ent time, there are available lamps in a rather
wide range, some characterized by a lag as high
as thirty milliseconds from the instant of closing
the circuit until the light is at maximum in
tensity, while others have no appreciable lag
and the maximum light intensity is practically
instantaneous upon closing the circuit, and one
of the primary objectives of this invention is to
construct a synchronizing mechanism that per~
gagement with its stop previously to movement
of the stop by the synchronizing member to re
lease the master lever for ?nal return movement;
Fig. 6 is a view similar to Fig. 5 showing the
position of the parts when the synchronizing
member has been shifted to disengage it from. the
master lever and permit operation of ‘the shutter
without affecting the ?ashlight circuit, the mas
ter lever appearing in set position;
Fig. '7 is an enlarged detail view of the synchro
nizing mechanism showing the parts in the posi
tion illustrated in Fig. 4, when the synchronizing
member has moved to set position and is held by
its locking device ;
mits using any of the various available lamps
and making a quick adjustment of the mecha~
nism So that the maximum light intensity will
always occur at the instant when the shutter is
fully open. To accomplish this, provision is made
for closing the circuit at an adjustable interval
in advance of opening the shutter to accommodate
low speed lamps, or opening the shutter in ad
vance of circuit closing for high speed lamps,
and while for the general range of lamps and
shutter mechanisms, these objectives can be sate
isfactorily attained by a spring-operated syn~
ing switch is mounted;
a highest speed or instantaneous lamp with a
chronizing member that moves under its own
power, provision is also made to close the flash»
light circuit by a positive direct action of a shut
Fig. 8 is a detail view in elevation of the mas
65 ter master lever during the latter part of its re
ter lever of the shutter mechanism;
Fig. 9 is a detail view in elevation of the adjust
turn movement, in order to obtain the high de
gree of accuracy necessary when coordinating
able support on which the ?ashlight circuit close
shutter of maximum speed of for instance 1/300
chronizing member;
70 to 1/600 part of a second.
These purposes are brought about in general
Fig, 11 is a detail view illustrating the normal
by a spring-operated synchronizing member that
position, before setting, of the synchronizing
is set by the setting movement of the master‘
member and master lever, showing the connec
lever of the shutter and is released by the initial
tion between these parts whereby the master
lever when moved to set position effects setting 75 return movement of the master lever, the syn—
Fig. 10 is a detail view in elevation of the syn
2,404,626
5
chronizing member upon release moving to close
the ?ash circuit switch which is adjustable to
any preselected point in the path of movement
of the synchronizing member, while the ?nal re
turn movement of the master lever and opening
of the shutter is dependent upon the synchroniz
ing member and occurs at a predetermined point
in the travel of the latter.
Referring more particularly to the drawings,
and to Figs. 1 to 3, I and v2 designate the inner
and outer annular walls of the shutter housing,
‘3 is the bottom wall of the housing, 4 the adjust
6
ing setting movement of the synchronizing mem
ber, and the pin l1 engages the curved edge of
nose 32, holding the locking device out of look
ing position, until pin |‘| moves far enough to
release nose 25, whereupon recess 33 permits the
locking device to swing counterclockwise toward
pin |'| so that latch 29 engages projection 3|,
holding the synchronizing member, as shown in
Fig. 7, in set position until released in the man
ner that will presently be described. The latch
portion 29 of the locking device is in the same
plane with projection 3| and offset from the
body of the locking device so that the projection
able cam plate, 5 the .stationary index cover
3| can ride over the nose 32 of the locking device
plate, and 6 are the shutter leaves connected to
and operated by a shutter ring, not shown. The 15 during the setting operation.
The synchronizing member is thus moved to
shutter ‘ring carries a pin ‘1 that is alternately
set position by the master lever S as the latter
moved in opposite directions to open and close
moves to set position under the impulse of the
the shutter during the return movement of the
manual setting lever I3, and when the synchro
master lever B which is pivoted on the post 9
and has an operating portion II that during its 20 nizing member is released in the manner that will
now be described, it moves under the impulse of
return movement operates a shutter actuating 1e
the spring 22 to effect closing of the flashlight
ver l2 to open the shutter and then engages the
circuit. Upon release of the master lever by
pin 1 to close the shutter.
.
operation of the trigger I4, as in the usual shutter
|3 designates the setting lever that is man
ually operated to move the master lever B to set 25 operation, the pin l1 travelling downwardly from
the position shown in Fig. 7 ?rst engages nose
position, and I4 designates the trigger that is
32 of locking device 26, located just under the
manually operated to release the master lever 8
recess 33 that receives the pin ll’, thus causing
to permit return movement of the latter for open
the locking device to be tilted clockwise on its
ing and closing the shutter when an exposure is
pivot 2‘! against the action of spring 28 in the
to be made. The mechanism thus far described is
manner shown in Fig. 5.
the same as in my earlier patents referred to
This releases projection 3| of the synchronizing
above and need not be described in greater de
member from the latch 29 so that the synchro
tail as it forms no part of the invention except
nizing member is free to swing on its pivot 2|, and
insofar as the master lever 8 controls and oper
ates the flashlight synchronizing mechanism that 35 this movement of the parts takes place during
the initial return movement of the master lever
will now be described.
.
from the position shown in Fig. 4 to that shown
Referring to Fig. '7, Hi designates a station
in Fig. 5. At this instant, the shoulder 34 of the
ary base plate suitably mounted in the housing
master lever engages a stop 35, see Fig. 5, which
and located above the master lever B for support
is pivotally mounted on a post 36 and held in the
ing the synchronizing mechanism which is oper
position illustrated in Figs. 4 and 5 by means of
ated to set position, as shown in Fig. '7, by a pin
the aforementioned coil spring 23 surrounding the
|'| ?xedly carried on the master lever B, see Figs.
post 36 and having one end engaging 2. lug 31 on
'7 and 8, and extending therefrom upwardly
the stop 35 while its other end engages the lug on
through the slot I8 in the supporting plate Hi,
the slot l8 permitting the necessary movement 45 the aforementioned locking device 23. 38 desig
nates an extension carried by the stop 35 and
of the pin H as the master lever travels back
engageable with the outer annular wall of the
and forth.
housing to limit movement of the stop in such
The synchronizing mechanism includes a syn
direction.
chronizing member l9 consisting of a generally
The stop 35 includes a tail piece 39, see Fig. 7,
segmental plate that is pivoted on a post 2| for 50
which is in position to be engaged by the pin 23
swinging movement between the inner and outer
on the synchronizing member, the normal posi
annular walls of the housing and is actuated by
tion of the stop 35 being shown in Fig. 3. The
a coil spring 22 surrounding post 2| with one end
stop has a downwardly turned lug M at its end,
abutting the inner wall of the housing While the
other end engages pin 23 carried by the syn 55 adapted to ride over the body of the master lever
to the position shown in Figs. 3 and 6, and to
chronizing member H3. The synchronizing mem
engage in front of the offset shoulder 36 of the
ber L9 is provided with a recess 24 that receives
master lever, as shown in Figs. 4 and 5.
the pin H, see Fig. 11, when the parts are in
When the master lever and synchronizing mem
initial or unset position, with the tapered edge of
the pin I’! located, under the nose 25 of the syn 60 ber are moved to set position, the stop moves
under the impulse of its spring 28 anticlockwise
chronizing member, which is thus in position to
and is then in position to arrest return movement
be lifted by the pin I‘! when the master lever
of the master lever after the latter has moved
moves to set position. Such action of the master
the slight distance required to release the syn.
lever carries the synchronizing member from ini
tial position, as illustrated in Figs. 3 and 11, to 65 chronizing member as already described. 'Fol
lowing this, the master lever is held against fur
set position as shown in Fig. '7, whereupon the
ther return movement until the synchronizing
synchronizing member is held by a locking device
member has moved su?iciently to shift the tail
26 pivoted at 21 on the base plate and held in
looking position by a spring 28 engaging lug 3!!
piece 39 of the stop so as to move the letter out
70 of engagement with the master lever, as shown in
on the locking device.
Fig. 3. The master lever is then free to complete
The locking device 26 includes a latch 29 that
its return movement to effect opening and closing
cooperates with a projection. 3| on the synchroniz
of the shutter, and it will be observed that the
ing member to hold the latter, said projection
engaging the curved edge of said latch and swing
ing the locking member out of engagement dur
opening movement of the shutter cannot take
place until the synchronizing member has moved
2,404,526
7
8
far enough to actuate the stop 35 and release the
see Fig. '7, when the synchronizing member moves
master lever for this purpose.
suificiently to bring about this action, which is
accomplished by an actuator on the synchroniz
ing member engaging the cam portion 5| of con
tact it. This actuator is designated generally
at 58 and is pivotally mounted on the post 59 of
the synchronizing member. The actuator 53 in
During the movement of the synchronizing
member just described, the ?ashlight circuit is
closed at a selected point in the travel of the syn
chronizing member, dependent upon the adjusted
position of the ?ashlight circuit switch, in a man
ner that will now be described, and while the
master lever is always released at the same in
stant in relation to the travel of the synchro
cludes a tail piece 5| engageable with a stop pin
52 on the synchronizing member and actuated
10
nizing member, the flashlight circuit can be
closed at various stages in the travel of the syn—
chronizing member depending upon the position
of the adjustable switch.
Thus the flashlight
against said pin by a spring 63 coiled around the
post 59, and having one end bearing against pin
62 while its other end bears against the in
sulated pin 64 which is carried by the actuator
of the adjustable switch is accomplished by the
and engages the cam portion 5|, of the contact
d6 as the synchronizing member moves past the
switch under the action of the synchronizer spring
22. This brings contact 46 into engagement with
contact Ill to close the circuit for an instant to
following mechanism~ '
effect ?ashing of the lamp after which the pin
circuit can be closed at any desired interval in
advance of opening the shutter or after the shut“
ter is opened, and closing of the circuit by means
Referring to Figs. 7 and 9, All designates an ad 20 s4 moves beyond the cam portion 5| of the con
justable support that is pivotally mounted on the
tact, and the latter is released and returns to
post 2| coaxially with the synchronizing member
its normal position against post 49.
and located beneath the latter for positioning at
During movement of the synchronizing mem
any selected point to accommodate lamps having
ber to set position, illustrated in Fig. '7, ‘from the
different characteristic lags. To effect this ad
initial position illustrated in Fig. 3, the pin 64
justment, the support Ill is provided with an ex~
tension. or ?nger piece 632 projecting through an
opening in the outer‘ annular wall | of the hous
ing and having a knurled edge lit, while till‘ is an
index mark cooperating with the ?xed scale 115 30
rides over the cam portion 5! without moving
the contact or affecting the circuit, since actu
ator 58 can tilt anticlockwise on its pivot 59,
the tail piece 6| swinging away from pin 62
against the action of spring 63, thus permitting
carried by the housing. The adjustable support
the actuator to travel in one direction when set
can be moved along the scale to any selected po
ing the synchronizing member without moving
the contact 116, while during movement of the
synchronizing member in the opposite direction
when released, the tail piece 6| is held against
sition and is held in adjusted position‘by fric
tional engagement between the extension 42 and
the edge of the housing wall adjacent the slot
through which it extends, or by a- projection at
pin 62 and cannot move further in a clockwise
on the extension engaging in openings 92 on the
direction, so that when the pin 64 engages cam
under side of the scale, see Fig. 11.
portion 5|. of the contact, the latter is moved to
Mounted on the adjustable plate All is?the flash~
close the circuit.
light circuit switch consisting of the spring con 40
The circuit closing operation may take place
tacts lit and All attached to an insulating block
early in the movement of the synchronizing mem
‘is also mounted on the adjustable support ill.
ber for a lamp having a long lag characteristic, as
The contact dd at its outer end normally engages
shown in Fig. 13, or may take place late in the
an insulated post ‘l9 mounted on the adjustable
travel of the synchronizing member for a lamp
support ill, and includes a cam portion 5| located 45 having little or no lag and characterized by in
in the path of the actuator which engages cam
stantaneous lighting, as indicated in Fig. 7. It
portion 5| to move contact G6 into engagement
is desirable to retard movement of the synchron
izing member after its release in order to delay
with contact 4%? and close the circuit, as will ap
pear presently. The ?xed ends of the contacts
opening the shutter when the circuit is closed
?rst or to delay closing the circuit when the
4-6 and Iii are connected by ?exible conductors
shutter is opened ?rst, and this is accomplished
preferably in the form of ?exible metal strips 52
by a retarding mechanism consisting of an
and
see Figs. 4 to 6, which are insulated from
escapement pawl (55 mounted on a post 66 and
each other, and ?xedly connected at their outer
engaging an escapement wheel 6'! mounted on
ends to conducting elements 541 and 55 mounted
an arbor and carrying a pinion engaging a
on the housing, and these are in turn connected
toothed rack 68 formed on the edge of the syn
to the jacks 56 and 5?, adapted to receive a de
chronizing member, the escapement pawl 65 and
tachable plug and to be connected to the ?ash
escapement wheel til’ being located above the
light circuit as shown in Fig. 4.
synchronizing member and actuator to permit
The ?exible connections 52 and 53 permit 10
cating the jacks 56 and 5'5 stationarily on the 60 movement of the last mentioned parts.
When the synchronizing member is in its nor
shutter housing while the switch itself is adjusta
ble throughout the desired range to accommodate
mal position, as illustrated in Figs. 3 and 11, it is
held in position for engagement by the pin H
any of the conventional ?ash lamps, some of
which have no appreciable lag and are substan
on the master lever with the nose 25 by yield
able spring means consisting of a plate 69, see
tially instantaneous while others have a lag up to
twenty or thirty milli-seconds between the in
Fig. '7, attached to the supporting plate It. The
stant of circuit closing and the instant of maxi
plate 69 is slotted to afford a yieldable tongue ‘||
provided at its end with an upstanding lug 12
mum light intensity, and with this construction,
that engages against the adjacent edge of the
both contacts and both ?exible conductors are
insulated from the shutter housing and mecha
synchronizing member when the latter is in ini
nism and neither side of the circuit is grounded
tial position, limiting its return movement and
through the shutter mechanism, as has been the
overcoming the action of spring 22 suf?ciently
practice in synchronizer structures heretofore.
to hold the synchronizing member in position to
The flashlight circuit is closed by movement of
be engaged and moved to set position by the mas
contact 46 into engagement with the contact 41, ' ter lever. The lug 12 also engages the pivoted
2,404,526
actuator 58 on the synchronizing member when
the latter reaches the limit of its movement, as
shown in Figs. 3 and 11, tilting the actuator so
as to move the pin 64 and insure release of con
tact 46 and opening the circuit.
When it is desired to operate the shutter with
out a ?ashlight and without closing the circuit,
it is desirable to disengage the synchronizing
member from the master lever so that the mov
10
switch support is manipulated as already de
scribed to its “off” position, permitting the syn
chronizing member to move out of operative re
lation with the master lever and thus freeing
the moving parts of the synchronizing mechanism
from wear and tear when the shutter is used with
out a ?ash lamp.
In some instances where an instantaneous or
“no lag” lamp is employed with a shutter of very
high speed, as from 1/300 to 1,4300 of a second, it is
di?icult to maintain the proper relationship be
tween movement of the spring-operated synchro
nizing member and the master lever, and it may
tion, where it engages the upstanding lug l2,
be desirable in such instances to e?ect closing of
and shifts the latter toward the body of plate 15 the flash circuit by positive action of the master
69, permitting further return movement of the
lever during or toward the end of the latter part
synchronizing member until the latter is out of
or‘ its return movement so as to insure closing
the path of the pin ll of the master lever, as
the circuit at the exact instant when the shutter
shown in Fig. 12. When the switch support is
is fully open and at a de?nite ?xed point in the
thus adjusted, the master lever can be operated 20 travel of the master lever, instead of depending
and pin H can travel back and forth in the slot
upon the operation of an independently moving
18 without causing any movement of the syn
spring-operated unit, as in the arrangement al
chronizing member. In this position, the locking
ready described.
device 26 is held out of the path of the pin I‘!
This result is brought about by the structure
by the extremity 10 on the adjustable support,
shown in Figs. 14 to 16 in which there is pro
see Figs. 9 and 12, engaging the end 88 of the
vided a supplemental actuator 13 pivoted at 14
locking device and tilting the locking device clock-l
on the supporting plate It and held in normal po
wise, so that the pin I‘! on the master lever is
sition by a spring 75 suitably mounted on a post
free to move without causing movement of the
16 on the master lever, the spring 15 having one
locking device.
end engaging a tongue on the master lever and
The operation of the structure thus far de
the other end engaging a downwardly extending
~ scribed is brie?y as follows: The switch is ?rst
portion 98 on the supplemental actuator 13,
adjusted to the desired position by ‘manipulating
which portion 9i) engages a part of the support
?nger piece t2 along the scale 45 in accordance
ing plate It to limit movement of the actuator
with the particular lamp that is being used, and
l3. 8% designates a latch portion on the actuator
the ?ash lamp being connected in the circuit, the
13 at the end of the arm ll’ and located in the
parts are ready for operation. The shutter mas
path of a lug 18 on the master lever. 19 desig
ter lever is set in the usual fashion by operating
nates an insulated pin on the actuator 13 ar
the setting lever I3, and this movement of the
ranged to engage a suitable abutment or cam por
master lever, through its pin ll, causes the syn 40 tion 8| on the contact 41 of the switch when the
chronizing member to be moved to set position,
switch support is adjusted to the proper posi
from the initial position shown in Fig. 3 to the
tion, and operable to move said contact 4'! toward
position shown in Fig. 7, the synchronizing mem
and into engagement with the contact 46 to close
ber being held in such position by the locking
the circuit when the supplemental actuator 13 is
device 26. When it is desired to make an expo
rocked clockwise on its pivotal axis ‘M.
sure, the trigger i4 is operated manually as usual
During setting movement of the master lever,
in a shutter operation and this releases master
the lug 18 on the master lever rides under the
lever B which moves initially from the position
latch portion 86 without aiiecting movement of
shown in Fig. 4 to the position shown in Fig. 5.
the actuator, while during return movement of
'lhls slight partial return movement of the mas 50 the master lever, the 111g 18 engages the latch
ter lever is su?icient to cause pin I‘! to engage
portion 86 and swings the actuator 13 clockwise
and move the locking device 26 out of locking
against the action of spring 15 and in such a
engagement with the projection 3| of the syn
manner as to close the circuit during the latter
chronizing member, which is thus released and
part and toward the end of the return movement
free to move under the action of its spring 22 and
of the master lever. Thus the ?ashlight circuit
carry the actuator 58 with pin 64 into engage
is not closed until the fully open position of the
ment with the cam portion 5| of contact 46 and
shutter or until the master lever has moved far
move said contact to effect operation of the switch
enough to insure opening the shutter to its full
and close the ?ash lamp circuit. During this re
est extent at the instant of the ?ash, and by this
turn movement of the synchronizing member, the 60 arrangement the instant of maximum light in
pin 23 carried by it engages the tail piece 39 of
tensity can be made to occur at the precise in
stop 35, swinging the latter clockwise on its pivot
stant when the shutter is fully open and the
36 until stop 35 is disengaged from the master
mechanism will continue to operate in this fash
lever and permitting the latter to return to the
ion without its accuracy or dependability being
position shown in Fig, 3. During this ?nal re
a?ected by repeated operations.
turn movement, the master lever opens and closes
As already described, the switch can be ad
the shutter, and this shutter opening and closing
justed to any point to effect closing of the circuit
operation can take place either after or before
in advance of opening the shutter. When ad
the ?ashlight circuit is closed, depending upon
justed to “zero” position, the shutter closes in
the position of the switch. By suitably adjusting
advance of the instant of closing the circuit, and
the latter, the circuit closing and shutter open
when the switch support is adjusted to the posi
ing operations can be so timed and related as to
tion shown in Fig. 11 to position it for operation
bring the maximum light intensity at exactly the
by the second actuator 13, it will have moved
instant when the shutter is fully open. If desired
far enough to engage lug 72 on the yieldable
to operate the shutter without a ?ashlight, the 75 spring member ‘H, see Fig. 6, thus disengaging
able parts of the synchronizing mechanism can
remain idle while the shutter is operated, and
this is effected by moving the adjustable support
4| in an anticlockwise direction to the “off” posi
2,404,526
11 l
the spring-operated synchronizing member from
12
ter controlling master lever operating to set and
release the synchronizing member, and a ?ash
light circuit switch located in the housing and in
operative relation with the master lever when the
switch is adjusted for operation by the second
cluding a pair of normally spaced spring contacts
actuator
The second actuator
cooperates to close the CR insulated from the housing and one of which has
a cam portion located in the path of movement
flashlight circuit only when the switch is in one
of said actuator which travels into and out of
position with the cam portion 85 on contact It?
engagement with said cam portion during its
located in the path of the pin '89 on actuator 13,
travel in one direction whereby the spring con
and when the supporting plate which carries the
switch is moved further until the index on the 10 tacts are engaged with each other for an instant
during the circuit-closing movement of the ac
hand piece coincides with the “oil” position on
tuator and are spaced from each other when the
the scale, the supporting plate will then have
actuator is at either limit of its path of ‘travel.
moved far enough to engage the tip 8i oi‘ the sec
2. In a photographic shutter, the combination
ond actuator and swing the latter clockwise
with a shutter housing including inner and outer
against the action of its spring until its latch
annular walls, of a spring-operated ?ashlight
portion is moved out or" the path of the lug on
synchronizing member pivotally mounted and
the master lever so that the latter can be moved
for operating the shutter without moving either
the spring-operated synchronizing member or
having swinging movement between said walls at
one side of the housing to close a circuit, an ac
the second actuator. When the parts are in this 20 tuator mounted on said synchronizing member,
a shutter controlling master lever operating to
position, the shutter is operable without affecting
set and release the synchronizing member, and
the ?ash lamp circuit.
a ?ashlight circuit switch quickly adjustable in
The second actuator just described is intended
the housing, said switch including a pair of nor
‘to be used for controlling the ?ashlight circuit
only in the case of a very high speed shutter with 25 mally spaced spring contacts, a, frictionally held
adjustable insulating block on which said con
a range of from 1/300 to 1/600 part of a second or
tacts are mounted, one of said contacts having
ess, in which case it is desirable to open the s" t~
a cam portion located in the path of movement
ter considerably in advance of the circuit clos ll,
of said actuator which moves successively into
operation
circuit toward
and the
to effect
latter closing
part of of
thethe
return
?ashmove 30 and out of engagement with said cam portion
during its travel in one direction whereby the
ment of the master lever. This insures the shutter
contacts are engaged with each other for an in
being fully open ‘when the circuit is closed so that
stant during circuit-closing movement of the ac
the instant of maximum light intensity, which oc
tuator and are spaced from each other when the
curs almost simultaneousiy with the closing of
the circuit in the case of a “no lag” lamp, will 35 actuator is at either limit of its path of travel.
3. In a photographic shutter, the combination
be effective at the moment when the shutter is
with a shutter housing including inner and outer
open to the greatest extent.
annular walls, of a spring-operated ?ashlight
Thus the mechanism provides for closing the
synchronizing member pivotally mounted for
circuit considerably in advance of the shutter
opening operation, slightly in advance of the 40 swinging movement between said walls at one
side of the housing to close a circuit, a locking
shutter opening operation, or slightly after the
device engageable with the synchronizing mem
shutter opening operation, any one of these rela
ber to hold it in set position, a manually con
tionships being effective with the spring-operated
trolled lever engageable with the synchronizing
synchronizing member that is released upon re
turn movement of the master lever, while by ad 45 member to move it to set position and engageable
with the locking device to release the synchro
justing the switch for operation by the second
nizing
member, an actuator pivotally mounted
actuator, which is moved positively by the master
on said synchronizing member, and a ?ashlight
lever during the latter part of its return move~
circuit switch located in the housing and includ
ment, closing of the circuit can be made to occur
ing
a pair of normally spaced spring contacts in
after the shutter is fully opened and while in
sulated
from the housing and one having a cam
such fully open position. By this operation,
portion arranged in the path of movement of said
proper and effective control can be had of a “no
actuator which moves successively into and out
lag” lamp with a maximum speed shutter, in a
of engagement with said cam portion during its
manner that insures closing the circuit always
travel in one direction whereby the contacts are
at the same instant in relation to the size of the . '
engaged with each other for an instant during
shutter opening, by a mechanism that is posi
circuit-closing movement of the actuator and are
tive, dependable, is not likely to get out of order
spaced from each other when the actuator is at
or require adjustment, and which does not ad
either limit of its path of travel.
versely affect the operation or mechanism of the
4. In a photographic shutter, the combination
(it)
shutter itself.
with a shutter housing including inner and outer
While the invention has been described with
annular walls, of a spring-operated flashlight
reference to a certain structural embodiment, it
synchronizing
member pivotally mounted for
is not con?ned to the details herein disclosed, and
swinging
movement
between said walls at one
this application is intended to cover such modi
fled arrangements as may come within the pur 65 side of the housing to close a circuit, a locking
device engageable with the synchronizing mem
poses of the improvements or the scope of the
ber to hold it in set position, a manually con»
following claims.
trolled lever engageable with the synchronizing
I claim:
member to move it to set position and engageable
1. In a photographic shutter, the combination
with the locking device to release the synchroniz
with a shutter housing including inner and outer
ing
member, an actuator pivotally mounted on
annular walls, of a spring-operated flashlight
said synchronizing member, and a flashlight cir
synchronizing member pivotally mounted and
cuit switch located in the housing in the path
having swinging movement between said side
of movement of said actuator and adjustable
walls at one side of the housing, an actuator
mounted on said synchronizing member, a shut 75 along said path, said switch including a pair of
2,404,526
13
14
normally spaced spring contacts mounted on an
gageable with the synchronizing member and
adjustable insulating block, and ?exible metal
acting to‘ hold it in set position, manually con
conductors connected at one end to said contacts
trolled means acting to release the synchronizing
and ?xedly attached at the other end to the
member, an actuator on said synchronizing mem
housing and insulated therefrom, one of said 5 ber, and a flashlight circuit switch in the path
contacts having a cam portion located in the
of movement of said actuator.
path of movement of said actuator which moves
9. in a photographic shutter of the settable
successively into and out of engagement with
type, the combination with a master lever con
said cam portion during its travel in one direc
trolling the shutter, of a spring-operated ?ash
tion whereby the contacts are engaged with each 10 light synchronizing member movable independ
other for an instant during circuit-closing move
ently of the master lever, an actuator carried
ment of the actuator and are spaced from each
by said synchronizing member, a flashlight cir
other when the actuator is at either limit of its
cuit switch located in the path of movement of
path of travel.
said actuator, and means on the master lever
5. In a photographic shutter, the combination 15 cooperating with the synchronizing member to
with a shutter housing including inner and outer
move it to set position when the master lever is
annular walls, of a spring-operated ?ashlight
set and to release it after the master lever is
synchronizing member pivotally mounted and
having swinging movement between said walls
at one side of the housing to close a circuit, an
actuator pivotally mounted on the synchronizing
member, a shutter controlling master lever oper
ating to set and release the synchronizing mem
ber, and a ?ashlight circuit switch quickly ad
justable in the housing and including a pair of
normally spaced spring contacts insulated from
released.
10. In a photographic shutter of the settable
type, the combination with a master lever which
during its return movement after release ef
fects opening and closing of the shutter, and
a ?ashlight circuit switch, of a spring-operated
synchronizing member, an actuator onsaid syn
chronizing member engageable with said switch
to close the circuit, and cooperating means on
the master lever and synchronizing member act
ing to set and release the synchronizing mem
the housing and one having a cam portion lo
cated in the path of movement of said actuator
which moves successively into and out of engage
ber by respectively setting and releasing the
ment with said cam portion during its travel in 30 master lever.
one direction whereby the contacts are engaged
11. In a photographic shutter of the settable
with each other for an instant during circuit
type, the combination with a master lever which
closing movement of the actuator and are spaced
during its return movement after release e?'ects
from each other when the actuator is at either
opening and closing of the shutter, and a ?ash
limit of its path of travel.
light circuit switch, of a spring-operated syn
6. In a photographic shutter, the combination
chronizing member, an actuator on said synchro
with a shutter operating lever, of a spring-oper
nizing member engageable with said switch to
ated ?ashlight synchronizing member, means on
close the circuit, means on the master lever en
the shutter operating lever acting to engage and
gageable with the synchronizing member and
set the synchronizing member, means controlled ~10 acting to set the latter as the master lever moves
by the shutter operating lever acting to release
to set position, a locking device engageable with
the synchronizing member in advance of the
the synchronizing member and acting to hold it
shutter opening movement, an actuator on the
in set position, means on the master lever en- _
synchronizing member, and a ?ashlight circuit
gageable with said locking device and acting to
switch adjustably located in the path of move
move it and release the synchronizing member
ment of said actuator and operable to effect clos
during the initial part of the return movement of
ing of a ?ashlight circuit in advance of or after
the master lever, a stop movable into the path
the shutter opening movement in accordance
of the master lever acting to hold the latter after
with the position of the switch.
release of the synchronizing member, and means
'7. In a photographic shutter of the settable
on the synchronizing member engageable with
type, the combination with a shutter housing in
said step to move the latter and release the mas
cluding inner and outer annular walls and a
ter lever for further return movement when the
master lever controlling the shutter, of a spring- . synchronizing member reaches a predetermined
operated ?ashlight synchronizing member pivot
point in its travel.
'
ally mounted for swinging movement to close a 55
12. In a photographic shutter of the settable
circuit independently of the master lever between
type, the combination with a master lever which
said walls at one side of the housing, an actuator
during its return movement after release eifects
carried by said synchronizing member, a ?ash
opening and closing of the shutter, of a spring
light circuit switch located in the housing in
operated synchronizing member, means on the
the path of movement of said actuator, a locking
master lever engageable with the synchronizing
device for the synchronizing member, and means
member and acting to set the latter as the mas
on the master lever cooperating with the syn
ter lever moves to set position, a locking device
chronizing member to move it to set position
engageable with the synchronizing member and
when the master lever is set and to move the
acting to hold it in set position, means on the
locking device and release the synchronizing
master lever engageable with said locking de
member after the master lever is released.
8. In a photographic shutter of the settable
type, the combination with a master lever which
during its return movement after release effects
vice and acting to move it and release the syn
chronizing member during the initial part of the
pendently of the master lever, means on the
master lever engageable with the synchronizing
member and acting .to set the latter as the master
return movement of the master lever, a stop mov
able into the path of the master lever and acting
to hold the latter after release of ‘the synchro
nizing member, means on the synchronizing
member engageable with said stop to move the
latter and release the master lever'for further
return movement when the synchronizing mem
lever moves to set position, a locking device en
ber reaches a predetermined point in its travel,
opening and closing of the shutter, of a spring
operated synchronizing member movable inde
2,404,526
15
163
an actuator mounted on the synchronizing mem
housing and quickly adjustable along the path
ber, and a ?ashlight circuit switch adjustably
positionable in the path of said actuator.
13. In a photographic shutter of the settable
type, the combination with a master lever which
during its return movement after release effects
opening and closing of the shutter, of a spring
operated synchronizing member, means on the
master lever engageable with the synchronizing
of movement of said actuator, said switch com
prising a pair of contacts, one of which is mov
able toward the other for closing the circuit and
both of said contacts being insulated from the
housing.
18. In a photographic shutter of the settable
type, the combination with a housing, and a
master lever which during its return movement
member and acting to set the latter as the mas 10 after release e?ects opening and closing of the
shutter, of a spring-operated synchronizing
ter lever moves to set position, a locking device
member, cooperating means on the master lever
engageable with the synchronizing member and
and synchronizing member acting to set and re—
acting to hold it in set position, an actuator on
lease the synchronizing member by respectively
the synchronizing member, a ?ashlight circuit
switch in the path of movement of the actuator, 15 setting and releasing the master lever, an actu
ator on said synchronizing member, and a ?ash
manually controlled means acting to release the
light circuit switch adjustable along the path of
synchronizing member, and means acting auto
movement of said actuator, said switch including
matically to effect return movement of the mas
a pair of contacts which are ?exibly connected
ter lever after release of the synchronizing mem
ber.
20 to and insulated from the housing.
19. In a photographic shutter, the combination
14. In a photographic shutter of the settable
with a spring-operated synchronizing member,
type, the combination with a master lever which
an actuator carried by said synchronizing mem
during its return movement after release e?fects
ber, 21. ?ashlight circuit switch adjustable along
opening and closing of the shutter, of a spring
operated synchronizing member, means on the 25 the path of movement of said actuator, said
switch comprising a pair of normally spaced
master lever engageable with the synchronizing
spring contacts one of which is engageable by
member and acting to set the latter as the master
the aforementioned actuator, a second actuator
lever moves to set position, a locking device en
movable to engage the other of said contacts and
gageable with the synchronizing member and
acting to hold it in set position, manually con 30 move it toward the ?rst mentioned contact, a
shutter controlling lever provided with means
trolled means operable .to release the synchro
engageable with said second actuator, means on
nizing member, means operated by the synchro
the shutter controlling lever engageable with
nizing member acting to release the master lever
the synchronizing member for setting it, spring
when the synchronizing member reaches a pre
determined point in its travel, an actuator on said 35 means engaging and holding the synchronizing
member in the path of the shutter controlling
synchronizing member, and a ?ashlight circuit
lever, the aforementioned switch being engage
switch adjustable along the path of movement of
able with said spring means and. acting to move
said actuator.
it and release the synchronizing member from
15. In a photographic shutter of the settable
type, the combination with a master lever which 40 the path of the shutter controlling lever and thus
disconnect the synchronizing member when the
during its return movement after release effects
switch is adjusted into the path of said second
opening and closing of the shutter, of a spring
actuator.
operated synchronizing member, cooperating
20. In a photographic shutter, the combination
means on the master lever and synchronizing
with a spring-operated synchronizing member,
member acting to set and release the synchro
an actuator mounted on said synchronizing
nizing member by respectively setting and re
member, a ?ashlight circuit switch adjustable
leasing the master lever, an actuator on said
along the path of movement of said actuator and
synchronizing member, and a ?ashlight circuit
comprising a pair of normally spaced spring
switch adjustable along the path of movement
contacts one of which has a cam portion that is
of said actuator.
engageable by said actuator for an instant dur
16. In a photographic shutter of the settable
ing travel of the latter in one direction, a second
type, the combination with a master lever which
actuator movable to engage the other of said
during its return movement after release eiIects
spring contacts and move it toward the ?rst
opening and closing of the shutter, of a spring
mentioned contact, a shutter controlling lever
operated synchronizing member pivotally mount
provided with means engageable with said sec
ed for swinging movement about an axis inde
ond actuator, means on the shutter controlling
pendent of the axis of the master lever, coop
lever engageable with the synchronizing mem
crating means on the master lever and synchro
ber for setting it, spring means engaging and
nizing member acting to set and release the syn
holding the synchronizing member in the path
chronizing member by respectively set-ting and
of the shutter controlling lever, the aforemen
releasing the master lever, an actuator on the
tioned switch being engageable with said spring
synchronizing member, and a flashlight circuitu
means and acting to move it and release the
switch located along the path of movement of
synchronizing member from the path of the shut
said actuator.
ter controlling lever and thus disconnect the
17. In a photographic shutter of the settable
synchronizing member when the switch is ad
type, the combination with a housing, and a
justed into the path of said second actuator.
master lever which during its return movement
21. In a photographic shutter of the settable
after release ei-iects opening and closing of the
shutter, of a spring-operated synchronizing
type, the combination with a master lever which
during its return movement after release effects
member, cooperating means on the master lever
opening and closing of the shutter, of a spring
and synchronizing member acting to set and re
operated synchronizing member, cooperating
lease the synchronizing member by respectively
setting and releasing the master lever, an actu
means on the master lever and synchronizing
member acting to set the synchronizing member
ator on said synchronizing member, and a ?ash
light circuit switch frictionally secured in the 75 by setting the master lever, an actuator on said
C
2,404,526
17
'18
able support that is pivotally mounted coaxially
synchronizing member, a ?ashlight circuit
switch including a pair of normally spaced spring
contacts one of which is engageable by the afore
mentioned actuator, a second actuator movable
with the synchronizing member, a ?ashlight cir
cuit switch mounted on said adjustable support,
and an actuator on the synchronizing member
to engage the other of said contacts and to move U! engageable with said switch.
24. In a photographic shutter of the settable
it toward the ?rst mentioned contact, means on
type, the combination with a master lever which
said master lever engageable with said second
during its return movement after release effects
actuator to move it during the latter part of the
opening and closing of the shutter, of a spring
return movement of the master lever, means on
the shutter controlling lever engageable with the 10 operated synchronizing member mounted to
swing about a different axis from the master
synchronizing member for setting it, spring
lever, cooperating means on the master lever and
means engaging and holding the synchronizing
synchronizing member acting to set and release
member in the path of the shutter controlling
the synchronizing member by setting and releas
lever, the aforementioned switch being engage
ing respectively the master lever, an adjustable
able with said spring means and acting to move
support that is pivotally mounted coaxially with
it and release the synchronizing member from
the synchronizing member, a flashlight circuit
the path of the shutter controlling lever and thus
switch mounted on said adjustable support, an
disconnect the synchronizing member when the
actuator on the synchronizing member engage
switch is adjusted into the path of said second
20 able with said switch, a second actuator movable
actuator.
to engage said switch, and means on the master
22. In a photographic shutter of the settable
lever engageable with said second actuator dur
type, the combination with a master lever which
ing the latter part of the return movement of
during its return movement after release e?ects
the master lever.
opening and closing of the shutter, of a spring
operated synchronizing member, cooperating
means on the master lever and synchronizing
25
25. In a photographic shutter of the settable
type, the combination with a master lever which
during its return movement after release effects
member acting to set the synchronizing member
opening and closing of the shutter, of a spring
by setting the master lever, an actuator on said
operated synchronizing member, cooperating
synchronizing member, an adjustable support, a
flashlight circuit switch mounted on said adjust 30 means on the master lever and synchronizing
member acting to set the synchronizing member
able support and comprising a pair of normally
by setting the master lever, an actuator pivotally
spaced spring contacts one of which is position
mounted on said synchronizing member, a ?ash
able in the path of movement of the actuator for
light circuit switch adjustable along the path of
closing the ?ashlight circuit, spring means acting
to hold the synchronizing member in operative 35 movement of said actuator and including a pair
of normally spaced spring contacts one of which
relation to the master lever for setting, a second
includes a cam portion that is engageable by
actuator movable to engage the other of said con
the aforementioned actuator for an instant dur
tacts and close the circuit, and means on the
ing travel of the latter in one direction, a sec
master lever engageable with said second actu
ator during the latter part of the return move 40 ond actuator movable to engage the other of said
contacts and to move it toward the ?rst men
ment of the master lever, said adjustable support
tioned contact, means on said master lever en
being positionable to engage said spring means
gageable with said second actuator to move it
and said second actuator to effect movement of
the synchronizing member and the second actu
during the latter part of the return movement of
ator out of the path of the master lever to per 45 the master lever, means on the shutter control
ling lever engageable with the synchronizing
mit operation of the shutter without affecting
the ?ashlight circuit.
member for setting it, spring means engaging and
holding the synchronizing member in the path
23. In a photographic shutter of the settable
of the shutter controlling lever, the aforemen
type, the combination with a master lever which
during its return movement after release effects 50 tioned switch being engageable with said spring
means and acting to move it and release the syn
opening and closing of the shutter, of a spring
chronizing member from the path of the shutter
operated synchronizing member mounted to
controlling lever and thus disconnect the syn
swing about a di?erent axis from the master
chronizing member when the switch is adjusted
lever, cooperating means on the master lever and
synchronizing member acting to set and release 55 into the path of said second actuator.
the synchronizing member by setting and re
leasing respectively the master lever, an adjust
FRIEDRICH A. GUSTAV PIRWITZ.
Документ
Категория
Без категории
Просмотров
0
Размер файла
1 984 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа