DE1772586B2 - Slide shutter for photographic cameras - Google Patents

Description

The invention relates to a slide lock for a photographic camera for adjusting a Exposure opening by moving the opening of the first slide into one on the optical axis the position of the camera lens, with during oer displacement of the first slide and afterwards the displacement of a second slide is triggered, the opening of which is on the optical axis of the Lens is arranged.

Fin shutter for photographic cameras is already known from a first and second slide with corresponding openings at different There are places that can be moved into an overlapping mutual position. The opening of the first slide is adapted so that it is the optical The axis of the lens intersects when the slide is moved in one direction, while the opening of the second slide lies on the optical axis and its displacement only after the overlap of the openings begins to cause the film to be exposed for a desired period of time.

It is known in this type of shutter that the size of the exposure aperture depends on the optical Axis of the camera can be changed with the extent of the overlap of the two openings can what with the timing of the start of movement of the second slide after Starting the first slide can be reached. It is also known for reducing the sliding speed of the first slide, an extended exposure time of the two openings together to extend the exposure of the film, in other words, the shutter speed to move into the area of low speed values.

It is peculiar to the conventional structure that the mechanism for reducing the speed of the first slide valve is disengaged from the first slide valve for the high shutter speed range. In other words, account is taken of the need to provide a means Κ ¹ by which the mentioned speed reducing mechanism is only coupled to the shutter when the speed is selected in the range of small values, and the speed reducing mechanism is decoupled in other cases. This complicates the locking mechanism as a whole.

The invention is based on the object of easy adjustment with a simple design the exposure time of the shutter or the shutter speed, especially in the range of allow low values.

According to the invention, this object is achieved in that the first slide is connected to the shutter release connected pawl is held and the second slide by a projection of a locking rod, those on an axis on the camera body

, _rt i <t and is acted upon by a spring acting in the direction of the two ^{geIa thi bW.} and ^{tenS h} ·, \ Any-, J operated on an adjustment wheel is provided. a Geschuindigkeitsregul softer on an at the end of the limb - -τ axis is selaaert. a connecting pin on the lever, which is in a slot in the locking mechanism, and a pin on the regulating lever. the ent-ί'o dir runs through the upper edge of the first slide * X,, n path with the sloping surface.

^ mH * 'orlie «ender invention is during the closing * of the" first slide in the cocked :; wr actuation of the locking device ne with the shutter release xerbundene "the second slide by means of a locking . e hold the latch connected with the speed * ^! - - J ^ r Xerschlußeinrichtuno via emc with the -, liatu «er the second;. by means of an array. the -, η Gcschwindiakeit.regulierhebel des Beiich- ao -'K-Un ^ s ₂ IiCdCS connected, st. wöbe, last-;:;. r connected to a turntable for the control of the h'.r.li ^ -chwind.gkeit -.st In this -, the i) opening of the second slide leaves on the g :: ri.ehen axis the camera lens and is from, 5 ^ ^dcn · opaque TeU of the first Schteber,

Suggestion of the VerscMuBauer ^ sers is de. The slider is released from the latch and the openings come to cover, while a, j ,. Speed control lever of the ob.nernu-r. Exposure metering ghedes by an r ₁ ', i-before the upper edge of the first slide becomes? Ä. The second slide is thereby freed 3d, a connection with the locking rod and moved by the action of a tension spring.

, _M the event that the pin of the Geschwindigkeitsregulicrhebc-is adjacent said oblique surface of Erten Scmebers is arranged. the second Schic-Sr is released correspondingly earlier, resulting cine gerip, .re Iberlappung the opening of the first and Sen slide results, namely a lower exposure in höhrercr Verschlußgcschwindigkct f _nl CV "ensatz to this, in arrangement of the pin ΪΙ C ^ chwindigkeitsregulierhebels in a A large distance from the inclined surface ensures that the first slide is only released when the opening of the first slide is open by covering the shutter, so that

reducing device or another aqunakn t mechanism is connected to L

In the case of a pneumatic ⁽
duziervornchtung is be.sp ^
used, from which d, c ^ allow .st. The end of the ^KL
Handcrs is connected to the same endurance reducing lever
other end of the
the air, in the cylinder

Bernde P ^ ™ ^ ^
aut ueen lever so.ang- ^au

-very ^ ^r . ^^ _: ^^
tr-uen 15. Demgcm ^
boron. after de,>, n <»!

lIba

^ ^d : _hebc ,

™ _Hundcn e piston - -

bi? T air out of the ^p _{n outlet} -

of the first slide _{Uu (} , _{crste full c}

boron. after this
Exposure position aeh. is

Execution can ^

lower ^speed g ^
^ ch was equivalent to ^

f '

™ ^ usual
with the uD »" £

_cschric benen

t in the area _immt

turntable for _easily executed in Ver devices speed exposure value can be simple type by

'tcr

^^ ..? ^^ _η That is, the exposure _plague ^{as ^ d} ^ ^tl «n _Bc , iUingsö ftnung on

nod d ^ st.üt d ^^ ^ _{6 rc}

dr ο ρ u, chen ^ A ^^^^^ ^ .. ^ _{w dcn}

the ottnun ^ ut. delayed movement

just like that, job "!," through the ^. ^^ _{extension of} the () ttnun _r α

indigkeit of the first rail _E S _wirkune of GeschwindigkeUsre _bcisp i _e lsweise means of a screw

_a , _s throttle valve acts and _{sl unscrews in the a sd}

fnun ^ ^ _{inncrh [l} , _b des

_gcbild et. If the screw deep ° _{t the end} of the cylinder eingc- ^. ^^ _{AuslaB, {fnung}

_{a longer} period of time to reduce air pressure

Ge.eh.vindigkeit

first slide heavily distorted Ehaub

opening of the first, slide through cover ^^^ "^ first slide st

öttnunc of the second slide is completely open, so that ^ 'on the other hand "causes less screwing

e ή ..rößerer exposure amount at a low encryption _a o g.rt. Different speed

is obtained chlußeeschwindigkeitseinstellung '£ ^C _un T _d u _r ch "a arößcrcn cylinder outlet Since the

»Sä.

SÄÄ MAS H? «·

see axis of the lens is reached, is reduced.

In order to obtain the damping effect, for example, a speed reducing lever which is subjected to the damping force is on the path of the first slide, rgesehcn and w.rd of the latter arranged protruding to tifujfasst De ^ O ₅ chen

Speed

_is well-known facilities for the _G ' _{eschvvindigkeUsrcduzicr} vorchwng

^^ _{Uiß can escape} and a SW?

nut d ^ _{end region} of movement d «^

i ^^ _{au hlosscn is} t, _there always ^ _hmcn

5 6

The second slide is in the cocked position against unpleasant influences, as in FIG. 1 shown is thus

secured, which reached as a result of a shock or impact.

can arise. According to the present invention is more prominent

An embodiment of the present invention pin 22 provided in the right part of the first slide

is shown in the drawings. 5 shows hen. Located in the trajectory of this pen

F i g. 1 is a front view of a shutter of a speed reduction lever 13, which is to

photographic camera according to the invention is pivotable in a pin 12 and one of which

cocked position, arm has a slot 13 α into which the piston

F i g. 2 a front view of the closure after rod 24 of the piston 24 α of the damping cylinder

its triggering from the in F i g. 1 shown position 23 engages,

ment, in the head of the cylinder 23 is a

F i g. 3 shows a perspective illustration of the screw 25 with a conically running groove

F i g. 1. 25 a. According to the length of the threaded

The reference symbol i identifies the first screw part, the degree of opening of the groove 25 o slide of the closure and 2 the second. The 15 adjustable to regulate the damping effect achieved with the cylinder 23 and the pawl 3 is connected to the shutter release 5 piston 24 α and is under the action of a return spring 26. Ren. A return spring 28 is used to return the bolt 3a the The pawl engages behind a front of the piston rod 24 and the speed reduction 1 α and along the direction of displacement of the decorative lever 13 into its starting position. The rest slide 1 and 2 is a locking rod 4, ao position of the lever 13 is through a stop 33, the right end of which is pivotable about an axis 32 of the in F i g. 1 is provided. A small one attached to the camera housing 30 bearing 31 hole 29 in the cylinder wall means that it is supported. This locking rod is under the force of the damping effect during the left-facing anti-clockwise spring movement of the piston only begins when the 27th from the FIG. 1 and 3 it can be seen that a 95 notch has passed through hole 29.
Projection 4 α on the underside of the locking rod If in the construction described, the arrangement (molded) is pressed against the projection closing trigger, namely the locking axis 5, down-2 α on the right end of the second slide 2, the moves Pawl 3 in the direction indicated by the arrow around the second slide in the cocked position and pulls shut. 30 back the bolt 3 a from the projection Iu, so

The first and second sliders 1 and 2 stand like that of the first slider 1 by the action of the pull the known versions under the action of spring 18 is moved to the right. During this of tension springs 18 and 20 (cf. the right-hand part of the figures directed to the right in relation to the figures). At the top of the first slide 1 movement, the inclined surface 6 of the slide 1 in there is an inclined surface 6. 35 Contact with pin 9 of the speed regulator

The exposure member 7 (control member for the Beiich- lierhebels 8 brought and thereby the lever 8 by processing time) according to the present invention, which pivots through the axis 8a and the connection moves a so-called shutter speed rotary pin 10 at the end of the lever 8 upwards. Locking disk 21 (shutter speed meter) is adjustable, is as a result of the engagement of the connecting pin 10 in the 40 slot 11 of the locking rod 4 arranged behind the aforementioned locking rod 4, this is pivoted in the direction and enables horizontal adjustment via the arrow around the axis 32,
a guide not shown. Around an axis 8 α on the second slide 2, which is held by the projection 4 a det left end of the control member 7 is the left end locking rod 4, is supported by those of a speed control lever 8, the pivoting is released and the effect sen right end 45 of the tension spring 20 shifted to the right with a connecting pin 10,
is armed, which is in a slot 11, in the left part of the previous description was e; the locking rod 4 engages. A protruding clearly shows that the second slide 2 is driven with delay pin 9 running along the lower end of the lever 8, namely only after the first of the path of the upper edge of the slide 1 with the slide 1 has been set in motion. In the inclined surface 6. 50 moment in which the opening 14 of the first Schie

While the first and the second slide in bers 1 is fully released or fully open, be

are in a tense position, the opening 15 of the stirs the pin 22 which the speed ver

second slide 2 around the optical axis of the Lin-reducing lever 13, which as a result of the attenuation

se A centered and the opening 14 of the slide 1 with the action of the damping cylinder 23 of the slide

Distance adjacent, as in FIG. 3, arranged to move over 1 at a reduced speed

net. When slide 1 and 2 are in their starting position.

development according to FIG. 3 after correct exposure of the The change in exposure time is available ii

photographic film, as described later, correspondence with the aperture ratio, since

is, are brought back, presses with the overlap of the openings 14 and 15 de

Tension member (not shown) connected to the closure slide 60 slides 1 and 2 during the shift be

Pull lever 16 the first slide 1 is correct in the direction of the arrow. This depends on the time span, bi

The inclined surface 6 of the slide 1 is in contact with one at its lower edge

Projection 17 forward, whereby the slide 18 triti in the pin 9 of the speed control lever 8

its earlier position against the action of the tension spring 1 the earlier the movement of the second slide 2

is brought back. Simultaneously with this movement 65 is directed before a complete opening of the exposure

The second slide 2 is also moved about the position of the opening 14 around the optical axis

pushed back a projection 19, which is reached by that of the lens A , the higher the Vei

the left end of the slide 2 is applied. The final speed and vice versa.

To regulate the period of time after which the movement of the second slide 2 begins, the position is of the pin 9 relative to the inclined surface 6 on the upper edge of the slide 1 variable. This change The pin position is achieved by the fact that the sealing element 7 on which the pin 9 is pivotable is stored, is displaceable. The exposure element 7 is adjustable by adjusting the turntable 21, whereby the position of the pin 9 arranged thereon relative to the inclined surface of the slide 1 is changed will. It can be seen from the drawings that when the regulating lever 8 is moved to the left, the Time to initiate the movement of the second slide 2 is shortened, while at a displacement to the right the time span is extended.

The change in the sliding speed of the slider 1 is obtained via the speed reducing lever 13 by adjusting the damping force of the damping cylinder 23. As shown in the drawings, this is achieved by changing the resistance of the piston rod 24 and the lever 13 opposite. The resistance is determined by varying the outlet opening by changing the length of the part of the screw 25 with the inclined groove 25 α that is screwed into the thread.

After the opening 14 of the slide 1 in the is brought completely open position, the displacement speed is reduced by the lever 13. The openings 14 and 15 are exposed to a longer exposure time when the pin 9 of the speed control lever 8 assumes a position remote from the sloping roof of the slide 1, by adjusting the turntable 21 clockwise and the resulting displacement of the connecting link 7 to the right. The initiation of the displacement of the slide 2 is in accordance thus delayed. The later the slide 2 is set in motion after the opening 14 of the first slide is fully open, the longer the exposure time is achieved, i. h one slower shutter speed is obtained.

ao Furthermore, the aforementioned exposure time can be extended and a shutter speed reduced by opening the opening 14 of the first The slide is made wider than the opening 15 of the slide 2.

1 sheet of drawings

Claims (6)

Patent claims: 1. Slide shutter for a photographic camera for adjusting an exposure aperture by moving the opening of the first slide into one on the optical axis of the camera lens located position, during the displacement of the first slide and afterwards the displacement of a second slide is triggered, the opening of which on the optical Axis of the lens is arranged. characterized, that the first slide (1) is connected to the shutter release by a button dene pawl (3) and the second slide (2) through a projection (4 ″) of a locking rod (4). which is g..igert on an axis (32) on the camera housing and from one in the direction acting on the second slide spring (27) is acted upon. and being one of a dial (21) actuated exposure member (7) is provided. a speed control lever (8th). which is mounted on an axis (8 a) located at the end of the link (7). a connecting suit (10) at the end of the lever (8). in a slot (11) of the locking rod (4), and a Pin (9) on the regulating lever (8). the along the through the upper edge of the first slide (1) given path with the inclined surface (6) runs. 2. Closure according to \ nspruchl. characterized, that the first S-prefer (1) and the second slide (2) each with in the same direction acting tension springs (18) and (20) connected are, the first slide (1) against the spring action via one with the photographic Closure lift lever (16) connected to the winding mechanism against the projection (19) of the second slide (2) is pressed and thus both slide in the cocked position to be brought. 3. A closure according to claim 1, characterized by a pivotably mounted about the pin (12) Speed reduction lever (13) on the track of a protruding, on the slide (1) arranged pin (22) is provided. wherein the pin (22) only after the opening (14) of the first slide (1) is fully released, hits the lever (13). 4. Closure according to one or more of the preceding claims, characterized in that that one end of the speed reduction lever (13) is articulated on the piston rod (24) of the piston (24 a) of a damping cylinder (23), the cylinder (23) provided with an adjustable air outlet opening at its end and at the same end of the lever (13) a return spring (28) is provided. 5. Closure according to one or more of the preceding claims, characterized in that that the adjustable air outlet opening (25 α) at the end of the damping cylinder (23) by a conical, in the axial direction running groove on the circumference of the adjusting screw screwed into the cylinder base (2 * 5) is educated. 6. A closure according to claim 1, characterized in that the opening (14) of the first The slide (1) is wider than the opening (15) of the second slide (2).