DE1938528C - Device for exposure measurement and for exposure-dependent control of the shutter of a photographic camera - Google Patents

Description

938

a capacitor C. The capacitor C can be bridged for the exposure measurement by a switch SWA.

An ammeter M is connected in series with a switch SWS to a circuit part A , which is connected to the battery E via the switch SW1 .

The circuit. _t is eil also connected to a point between the photoresist Rl and the capacitor C and has an output that leads across the electromagnet Mg, and a switch SW 6 for battery £.

The switches SW1 and SW6 can be operated together by the shutter release. Independently of this, the switches SW1 and S W1 can be operated together by means of the control button for the exposure measurement.

During an exposure measurement, the circuit part A receives current via the switch SWX , while the ammeter M is connected to the circuit part A via the switch SW ~ S and makes a display influenced by the photo resistance Rl ^ t. The switch SWA is closed and the switch SWb is open.

When the lock is released, the scarf HBS

In order to provide an overview, the switches t in the table are

20th

represents. Rest position Exposure
mes ig Closure
tripping counter on
on
to
on ' to
to
to
on TO
on
to -> open
to SWl
SW3
SW4
SVv 6

1 sheet of drawings

Claims (1)

cn i "t this in the known Vorrich- ** ^Must H '' you? chmodfch that one switch for Claim: ffSÄS S »* ·« *** leaves Then ■ λ iheTdk; line half of one with a hchtemp- Device for exposure measurement and for be wiro _{aoer tond} equipped multivibrators, light-dependent control of the shutter ι Jj ",, _ measuring amplifier works, constantly under power geeiner photographic camera, with a trigger a» au. m premature consumption of the water to open and an electromagnet to set what ^ _{battery keeps} the shutter open, as well a ^Stt ° ^m ? " ^e _h; "i _st apparatus for BeHchtungsmes AEC Gued and a current source, the resistance ^w", 7 Llichtunesabhängigen shutter control state value of the AEC member in dependence on io solution ™ ~ _i J ^ 32c _he Patent 225.515), in which exposure being variable, and for loading ^ "," the capacitor "" ^ _{n e} in Schaltungsteü to the source, bypassing the RC to JJL _{1 a} switch either a meter he α "clearing measuring the resistance and the current""uuu ^ Shutter control encased part of an exposure display instrument, beuchtungsaDnans? B _{arrangement wn} -d there but closed, while for exposure-dependent π tet wira.Ji ¹ ^ -. _H , d ^ _the electromagnet is not are closed, would be gg! <. ,,, that the electric magnet gen control of the lock by one of the ^^ "Lten of the lock in the way serves. Trigger to be actuated contact of the condensa now unauuu ^ _ ^ the exposure time below tor of the RC guies has power, and Errei o_ ^{au tr} "·" _vjelmehr the electromagnet _is ersi chen a certain charging voltage in a ^Mr '"" of _the exposure time is switched on and.:', 'i circuit part triggers a switching process that triggers the 2 ,. on ^fcn * ^J * ¹ '"" _{hot "and} he treading in activity - Power supply to the electromagnet interrupted. then, over z «u ' _{h | uß nhebel frci} . With you ddh kihnet that three Power supply to the electric _{housing lever frci} . With you characterized in that drei.η rest W "™™ JJ ^ _n delays in closure position open switches (SWl, SWb, SW2) provided Vorrch ser un ^ tru ^ ^^ ^. ^ can be seen, of which the first (SWl) in a ge of the closure au common power supply to the RC element (JI, 25 ^lun ^ ™ ^{"rf r} £ ^ days ligand invention is is O and the circuit component (A), the second (S Wb) Dit Autgabe aervλ> e Flektronw in series with the electromagnet (Mg) and the ^ "^^ Sri. the user has the possibility of the third (SWl) in series with the warning indicators open *". · only one cir. geinstrument (M ₁ are arranged, and that by ken * ^ "^ f ^ _n ^ S BeHchtungsmessun, the trigger only the first and second scarf 30 zigen Knoptes" ¹ J-. lock control unit (SWX, SW6) and by a special loading or "?"' ^cht ^^ "^ sometimes not required service button for the exposure measurement only the i" ^chzuruh " ⁿ V _M * °: _Slrom receives the battery first and the third switch (S ^ l, SW3) common circuit parts. l no electricity email, which can be closed. is spared. ^^ ^. ^ ^^ _calledcn Device according to the invention solved by the fact that three switch.x, which are open in the rest position, are provided. of which the first in a common stream / u Leadership to the ßC element and the circuit part. the 40 second in series with the electromagnet and the third in line with the indicator instrument The invention relates to a device arranged and that by ^ n Aus, _{ser nr} for exposure measurement and exposure-dependent the first and the second switch and by JinenM * gen control of the shutter of a photographs special operating button fu '<£ JW chtu ^ me fchen camera, with a trigger to open and only the first and the third switch can be locked together with an electromagnet to keep the door open. Exposure tunes Closing, as well as an RC '-long and a power source- By the cond.enungs ^ Jj ^^ S ,. Ie, where the resistance value of the RC element is in measurement, so the first and the dntte bchaUer depending on the exposure can be changed and actuated together, whereby, J "^ where for exposure measurement the resistance and 50 g.ge resistance and the measuring the current source below Bypassing of the capacitor th. But the electromagnet of the RC-GWtdcs to an exposure display instrument are connected by the shutter release ^, while the exposure-dependent switch jointly ^b « ^aU f Rieen control of the shutter by a dependent W.derstand and the? 8f _{| f} ^? XSse to be actuated contact the capacitor 55 is obtained, but the measuring instrument is switched off the KC member St.om receives, and when a D.ese advantages are reached emdt, o ^ JJ ^ JgS certain charging voltage in one circuit part about on the other ψ ^ Ι ^ 'ίΖΤ ^ τ triggers a switching process that should have the power supply: It is namely possible, even during an interrupted to the electromagnet. Exposure measurement, i.e. during the In a known device 60 of this type, the control button shown is depressed, aen (German Auslegeschrift 1,268,960) are to be triggered for the Beiich lock. One can do so during one exposure measurement and for exposure-dependent exposure measurement an unforeseen snap the lock is provided with a switch. make a shot. If only one exposure measurement is to be carried out. the one switch is operated. On the other hand, if the shutter is to be released, both must be described with the aid of the drawing. The circuit contains a battery E, which has over Switches are operated. If one wants to avoid that a switch SWl with the ÄC-member in series gives two buttons to release the shutter is operated, which is made up of a photoresistor Rl and