DE333139C - Shutter for photographic lenses - Google Patents

Description

The invention relates to a lens shutter of the known type of shutter, which can be swiveled out of sector-shaped pivot pins by means of a rotatable ring Discs are made.

The closure is, like certain known closures, designed so that it can be set by a single adjuster for ball, continuous or instantaneous recording with a speed variable from a certain speed series, e.g. B. ^r » %> ¹ Io, Vso.-Vioo or ¹ Ia ₀₀ seconds.

One of the main features of the closure according to the invention consists of a device through which one is the mainspring for the variable speed adjustable instant shutter cocked, while the photographer. take a look through the ball or permanent setting. With the previous devices causes the release lever to be handled while the mainspring is under tension .For snapshots, always relax them, so that if you look for a Carelessly tensioning this spring makes the ball or permanent setting · the then the pointless relaxation of the pen shakes the whole apparatus. It is also desirable to first wind up the spring for snapshots, to then as desired and occasion depending on a moment, ball or To be able to record continuously. At the shutter. according to the invention can

■ you wind up the -spring before you adjust the device to an object, and you can

; then at any time as desired for a moment ! or take time recording without im

■ Relaxation in case of a time recording · the moment the lock occurs.

This is achieved by virtue of the invention: a special embodiment of the usual Ratchet, which keeps the spring taut for snapshots, reached. This pawl is namely in connection with a lever which only then engages, i. H. in the way of the release lever occurs when: the shutter on snapshots . is set. As long as the shutter is set up for ball or permanent reception, the lever connected to the pawl remains out of reach of the release lever.

In one embodiment of the invention, the adjustment device carries the closure on the axis of an adjusting disk "a row of cam disks, one of which is the Starting the movement for ball pick-up causes, while another causes the gearbox controls for permanent setting, and a third controls the lever connected to the release pawl of the work for snapshots in the AVeg of the release lever. A fourth, with

variously profiled points, controls an air brake in a known manner, which slows down the closing movement of the shutter when taking snapshots.

This exemplary embodiment of the invention is shown in the drawing.

Fig. Ι is a front view of the whole

Closure with the omission of the lid, in the position which the parts when set take for a permanent recording, with the work relaxed for snapshots - in extended ones Lines - is shown.

Fig. 2 is a corresponding view with the omission of the gear for the shutter for continuous recordings to better show the action of the gear for ball adjustment. The full lines show the gear parts in the rest position, while the dash-dotted lines show them in the position they are in as a result of the lowering the release lever, d. i. in the open position of the shutter.

Fig. 3 is a similar view showing the parts that effect the ball adjustment. shows in the rest position (initial position, closed position of the lock).

Fig. 4 shows a corresponding view of the parts in the position which they as a result of the lowering of the release lever, whereby the shutter opens, assume which position the parts as long as you keep the lever in its lower position.

Fig. 5 shows the gear parts in the position they assume when you press the release lever has released, with the shutter remaining open as long as you do not lower the release lever a second time.

Fig. 6 shows the position of the parts after the second lowering of the release lever, the release of which closes the shutter after this second lowering.

Fig. 7 shows the shutter in the setting for a snapshot, with the gear parts for ball and permanent setting are ineffective and the one with the tension pawl the momentary spring connected rocker arm in the path of the release lever is led.

Fig. 8 shows in perspective the gear for ball and permanent setting, the adjuster with its cam disks and the jig for snapshots.

Fig. 9 is a section through the axis of the apparatus, only the cam controller and the Pointing to the articulation of the release lever.

The closure has, like the known apparatus of this type, a base body A which, together with its outer part, forms an annular capsule in which the various gear parts are housed and on which an annular disk B of known design can be rotated in such a way that one can go through Turning the same to one side brings the sector disks in front of the locking hole, while you open the disks through., Turning to the other side. Thus, the opening of the closure is effected in a known manner by turning the ring disk B by means of its "button b counter to the clockwise rotation. The closing is effected by turning the ring disk in the opposite direction by means of the button b ^{1 of} a spring C, which moves one out of the sleeve A protruding pin σ is wound and lays with its free leg against the wall of this sleeve and with its other free leg c ¹ against the button b ^{1 of} the washer.

The apparatus also has, in a known manner, a spring housing D, in which the mainspring for the instantaneous recordings is accommodated, which is kept tensioned by latching the detent d of a ratchet wheel behind the tip e of a pawl E.

This latching is effected by lowering the clamping lever F. The drive of the ring disk B by the spring of the housing D is effected in the illustrated embodiment by means of a translation, which is described below and which is used to take the ring disk with you by means of the • button b ¹ the clockwise rotation is used.

According to the invention, the pawl E, which can swing out about the pin e ¹ protruding from the housing A , is extended rearward to form a tail FJ- which carries a pin g to which a rocker GG ^{1 is} articulated. A spring wound around a bolt h of the bushing A is supported with its one free leg H against the pawl E and with the other against the arm G of the rocker GG ¹ .

The spring HH ¹ thus always wants to keep the pawl E depressed while it holds the arm G of the rocker raised and thereby brings ^{the arm G 1 of} this rocker out of the way of the release lever L.

It is readily apparent that the tensioning lever F can be turned over until the detent d is applied to the tip e of the pawl E (in the position shown in phantom in FIG. 2) without the rocker GG ¹ in the path of the release lever / comes. When the spring is pulled up, the pawl E, swinging out around the pin e ¹ , rises as the cam d passes, with the spring H being slightly tensioned.

As below! is explained ¹ , causes a. Cam of the controller after moving the device into its position for eye

View shots the lowering of the arm G of the rocker arm by pivoting it around the pin g and thereby the lifting of the arm G ¹ , which thereby enters the path ^{1 of} the release lever /.

The regulating device 'of the closure has a disc / which rests on the outside of a collar k (FIG. 9) rotatable about a bolt / of the sleeve A. Four cam disks K ¹ , K °, K ^S , K ^{4 are} formed on the collar, which can be brought into the position corresponding to the desired work process by turning that disk, with a d in front of a fixed index L carried by the axis / 'he enters the following inscriptions on the disc:

P ¹ (ball setting), P- (permanent setting), (snapshot at 1 second), Y (snapshot at Va second), % (at V ₅ second), V ₂₅ (at V ₂₅ second), Vso ( ^{at 1} Uo second ), ¹ I ₁₀₀ (at V100 second), 7 «do (at Vsoo second).

If the disk / is set so that the inscription P ¹ (ball setting) is in front of the fixed index L , the cam K ^{x is} in the position shown in FIG. 2, in which it rotates the arm · M of a rocker MM ¹ , which sits on an axis m carried by the release lever /. A spring N is wound around this axis, one end of which bears against the wall of the bushing A and the other end of which bears against a stop pin M ″ of the arm M ^{1 of} the rocker MM ^1. 1

As can be seen, the spring N wants to push the arm M ^{1 of the} rocker MM ¹ outwards and thus raise the release lever 1>. [

In the fully excellent in Fig. 2 | Position, d. h, when the arm M of the j rocker MM ^{1 is raised} from the cam K ¹ , the end « ^{1 of} the arm M ^{1 is} immediately in front of the button b of the ring disk B. almost in touch with him. If the release lever I has been lowered, it takes it along with it when it rotates around the bolt / rocker arm MM ¹ , displacing the spring JV, and thus presses the button b . At the same time, the button b ^{1 is moved} by the same amount, pushing the spring C back. The various organs move into the position shown in phantom in FIG. 2, the displacement of the button b being effected in the known manner and the opening of the closure being effected by pushing forward the movable sector discs.

The lock stays open as long as you

presses the release lever /, i.e. as long as

> o you · hold it in the position shown in dash-dotted lines. If, however, one releases it,, 'then the spring N, as it relaxes, leads all parts back into the position drawn with fully drawn lines, while the spring C, when it relaxes, the! Brings locking disks back into the closed position. The stroke of the buttons b and I b ¹ is limited in a known manner by the length of their guide slots 0 and O ^{1, respectively.}

As you can see, the activity of the work for ball adjustment leaves the clamping pawl E for snapshots and the swing arm GG ¹ , whose arm G ¹ is not in the way of the release lever /, completely unaffected.

^{If you bring the label P 2 in} front of the ■ fixed index by adjusting the dial /, you have the. Apparatus set for a continuous recording (Fig. 3).

In this position, a second cam disk K ″ has stepped with its notch in front of the free end of the arm P of the rocker PP ¹ , which rotates around a pin / »the ι bushing ^!

The rocker MM ¹ , the arm M of which is constantly supported with its free end on the cam K ¹ , has retained the fully extended position in FIG.

Under normal circumstances, the rocker PP ¹ , when the cam K ° on its arm P with a different location than the notch mentioned, ^{assumes the position shown in FIG. 7, in which its finger ^ 1} is in contact is located at the free end of the arm Q of a -Ö5 rocker QQ ¹ , which is hinged to a bolt q of the bush A. This keeps this rocker in a position in which the end g ^{1 of} the arm Q ¹ is outside the path of the is Mitnehmerknopfes ¹ b. a q about the pin coiled spring R, which is supported with its one end against the wall of the bush y4 and the other against the arm Q ^1, strives constantly, the end q ¹ in the position shown in FIG. 3 To take position.

When the arm P of the rocker PP ¹ engages with a free end in the notch of the cam disk K ~ , the spring R can relax and push the arm P ^{1 of} this rocker away. The parts then have the fully extended layers in FIG. 3

Applies to a print on the release lever from J, it is achieved, as in the case of the ball setting a displacement of the rocker MM ^1, which has the consequence that the Mitnehmerknopf b goes from left to right. In doing so he slides on the tip of the arm. Q ¹ , while he pushes this "arm back, -until the bolt, reaching the other end of the slot O ' ," comes out of it

Fig. 4 visible position of the pushed forward by the spring R again. Tip q ^{x of} the arm is held.

Then you can let go of the release lever /, whereupon the spring N and the rocker MM ¹ in. returns to the starting position. The parts take d ^! ann the position shown in FIG. The lock, which opened when the lever was lowered, remains open as long as you do not swing the release lever out again.

If you have the release lever a second

Once lowered, an oscillating disk 6 ″ comes into effect, which is hinged to a pin j on the arm M ^{1 of} the rocker arm MM ^1. The spring T wound around the pin s is supported with its end A against the lever arm M ¹ and with the other end A ¹ against the pin 6 " ¹ . But this pen wants

■ 2o constantly rotate the oscillating disk in such a way that the pin S ^{1 is} swung outwards. A counteraction is exerted by a protrusion Q ^{1 on} the arm Q 1, which, under the action of the spring R, which is stronger than the spring T, constantly tries to bring the oscillating disk into the position shown in FIG.

The vibrating disk S does not play a role in the way in which the ball is adjusted. With the permanent setting, on the other hand, the oscillating plate engages as follows:

During the transition of the gear parts from the position of FIG. 3 to the one of FIG. 4,,. so with the first lowering movement of the release lever, which causes the opening of the shutter, the oscillating disk 5 ¹ simply follows the movement of the lever, MM ^x in the position in which the button b holds it. It thus reaches the position according to FIG. 4.

If, as a result of the release of the release lever J, the parts assume the position shown in FIG. 5, the oscillating plate 5 "has simply returned to the position shown in FIG. 3, since the protrusion Q" prevents the spring T from expressing movement. Man 5 position shown, then lowers the trip lever I from its Fig. Again, the arm M ¹ is carried along and with it the oscillating plate S. Their corner S * engages here between the wart Q ² and a second wart Q ^s of the arm Q \ where it swings out about the axis j, finding a stop at the wart Q ^s. The depression of the lever / thus, through the intermediary of the arm M ¹ and the oscillating disk S, results in a pressure against the protrusion S ^ with the compression of the spring R , as can be seen in FIG.

Thus the receding tip of the; Levers! Q ¹ clears head b so that when one | now the release lever I releases, the counter spring C moves the bolt b ^% and ¹ brings the sector discs of the lock into the 'closed position.

It can be seen that these processes for bringing about the permanent setting in no way affect the position of the pawl E and "of the rocker arm GG ^{1 connected to} it.

For snapshots one must first tension the spring, which is arranged in a spring housing D in a known manner, which, as noted above, causes the pawl £ to engage behind the tooth <2 of a ratchet wheel. After this is done, you pose! the disc / at the index L to the numbers 1, ¹ Z ₂ , ¹ Z _n and dgj. depending on the desired speed.

Whatever speed you set, a cam disk Κ ^Ά always comes to rest on a pin G ² , which is connected to the arm G of the. the pawl E connected rocker arm GG ¹ protrudes. By pressing against the button G ² , the cam disk K ^s causes the rocking lever G G ¹ to swing out about the pin g and thus brings the arm G of this rocking lever into the path of the release lever /. In order to take a snapshot at any speed, it is sufficient to bring the cam disk K ³ into the desired position so that this speed is displayed on the fixed index L , and then to lower the release lever I. During this lowering movement, the lever / hits the arm G of the rocker arm GG ¹ and takes it along with the pawl E , which releases the tooth d , whereby the spring comes into effect for snapshots. The action of the closure under the action of this spring is brought about by a known device such as that shown in the drawing in an exemplary embodiment. In the disk, which carries the tooth d , there is a slot TJ in which a pin ν is guided, which sits at one end of a rod V , the other end iP- of which is hinged to one arm W of a rocker WW ¹ is, which in turn swings around a bolt w seated on the bushing A. The arm W ¹ is located with its end continuously from below to the knob l · on the searches continue to push the spring in the direction of rotation C of the clock hands, so in the sense of closing of the shutter. One end of a spring X wound around the axis v ^% is supported against the rod V and! with the other against the arm W of the rocker, so that they constantly approach the rod V and the arm W \ each other and strive to bring the bolt h into a detent 11 of the slot TJ (Fig. 7).

By pressing down the trigger J, one free, as shown above, the tooth d by means of raising the jack E. Then comes the spring for instantaneous recordings into effect, so that the those tooth-carrying disc rotates, taking with it the rod V and through this also the rocker WW ¹ , the arm W ^{3 of} which lifts the button b ¹ , which results in the opening of the closure.

Once the spring is relaxed for taking snapshots, the counter-spring C comes into effect and returns the button b ¹ to its starting position, which results in the closure of the shutter. The adjustment of the speed at which the spring relaxes can be done by any known suitable means, e.g. B., as in Fig *. 1, regulates the size of the air outlet of an air brake by means of a needle Y in that it is set differently, depending on the deflection given to its setting lever Z by the 'cam disc K ⁴ , which by means of the disc set accordingly to the index L / is brought into the required position.

Claims (3)

Patent Claims: i. Shutter for photographic lenses, characterized in that the pawl (Ji) which locks the spring for the snapshots in the housing (JJ) and is influenced by the release lever (J) is designed so that it can be opened during use of the ball or permanent setting of the regulator device ( K ¹ bis / C ⁴ ) is kept out of the path of the release lever (J). 2. Embodiment of the closure according to claim 1, characterized in that a rocker arm (GG ¹ ) is articulated to the pawl (E) , one arm (G) of which a spring (H ¹ ) loading the pawl serves as an abutment, while its other Arm (G ¹ ) keeps this spring out of the path of the release lever until the control device (Ji ¹ to Jf ⁴ ) guides it into this path by acting on the first-mentioned arm. 3. Embodiment of the closure according to claim 1 and 2, characterized in that the control device for ball and permanent setting as well as for snapshots with optional speed on the axis of rotation (/) of a setting disk (J) a set of cam disks (Jf ¹ to K ⁴ ) a 'sleeve, of which two (K ¹ K-) successively set the mechanism for ball and permanent setting in effect without acting on the rocker arm (GG ¹ ) connected to the release lever for the spring for instantaneous recordings, while the third cam disk ( K ³ ) by acting on a stop (G ² ) of the rocker arm guides it into the path of the release lever (J) and a fourth cam disk (K ⁴ ) at the same time of choice with differently profiled points on an organ to regulate the speed of relaxation of the spring for snapshots "acts. For this purpose 2 sheets of drawings.