DE1942725A1 - Photographic camera with film transport motor and film for this - Google Patents

Description

75/73 'August 1, 1969

PATEMTA H W ALTE

DR.-1 N G. WOLFF, H. BARTELS Reg. 122 055

Vj ;;. Ii RAND ES, D R. - IN G. HEL ύ

7 STUTTGART-N, LANGE STRA & f T-

Eastman Kodak Company, Rochester, New York State, United States of America

Photographic camera with film transport mQto "r and. Movie

- for this

The invention relates to a photographic camera a motor for film transport and a switch to turn the motor on and off. from a power source.

Are see ^v in still cameras, which comparable with an electric motor, which advances the film after each exposure, it is customary to provide a cam or the like which controls the motor for the film transport and for the mounting of the closure, so that the next Exposure can be made. These known devices have the disadvantage that the film transport is controlled by a certain number of ■ rotations of the cam, so that

"" "does not always transport a" constant length of the film as the film increases, the take-up reel is wound up. The distances between the exposed

"™" Area from each other "" are therefore not always the same ", so that

"difficulties arise in the development of the film, when using devices in which the exposed film pieces are automatically framed.

To ensure that every single film transport a constant length of the film is transported; facilities have been developed to enable the operation of the

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Controlling the film transport by a "mechanical measurement" -. ■. Of the transported Piilir.es. These Eir: richtur, f-ori have two inevitable disadvantages The second disadvantage of this known device is that it depends on the measurement of the egg length of the transported film. An inaccurate measurement caused by a KlS in the perforations for the spikes of the transport roller or by other mechanical errors leads to inaccurate control of the film transport and thus not only to unnecessary cover consumption or double exposures but also to the above-mentioned disadvantage of the different distance between the exposed areas. '■',. -, -..- -

The invention is based on the object of creating a camera with a simple and precise control of the film transport: "which ensures that with every single film transport the film is always transported by a constant film length. ... - ■ _

According to the invention, this object is achieved in that a device is provided for scanning a marking on the film, which device is connected to the switch. imd ^v 'Kiife-one -. ; Braking device for braking the ^; Motors' so coupled * = ^; ■ is that after the Trarispdrt "of" the film around eln-by ^: the: marking given piece-'dcS? Motor off and the brake. : "■" .: device can be switched on. The fact that at the same time as "switching off the motor the" braking device switches -.- switches vitrd, is achieved ^ that'with the Abse'hälten of ^: - ■. Motors at the same time: also the film transport ■ 'is stopped; ^ - '% Because this termination of the film transport is controlled by ... the device that scans a mark on the film "is achieved that, the film transport exactly

by the one provided on the film. Mark is controlled, the dividing of the film may be carried out in frames very accurately accordingly, so that then each individual film transport corresponds to n ^e of the lung exactly one frame. The same marking can also be used to control devices handling the film, for example copiers, devices for framing the pictures taken, etc. '

In an advantageous embodiment of the invention is a contact of the switch is provided as a braking device, which in the switch position of the switch to turn off the motor short-circuits it, which makes a very simple one and very effective braking device created. as Markings on the film can be provided with a corresponding perforation on the film, which is mechanically scanned by a key element which actuates the switch. Another possibility is to use an electrically conductive contact piece of the switch on the film Plating to be provided as the film's rattling irregularities having.

The invention "therefore also relates to a film for The "Kariera" according to the invention. The film is according to the invention characterized in that it has irregularities provided, electrically conductive coating, the UnrerelmSchipkeitc-r. yorrurcrelse accordingly .der. Bildfeicern des Filir-es arranged sir.ä.

The invention is in the following specification of two shown in the drawings. Execution examples in. individually explained.

Show it:-' .·

Fig. 1 is a schematic representation of the switch of a first embodiment =; i '.

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Fig. 2 to 1 excerpts from Fig. 1 of three successive positions of a cam and a <? r claw;

'Fig. 5 is a schematic representation of the switch of a second embodiment ·;

Fig. 6 to 7 excerpts from Fig. 5 of two

successive positions of - _:,

Contact pieces of the switch.

According to Fig. 1 are in a camera housing (not shown) a : Film voi power reel 11 and a film take-up reel 2 are arranged. A film 12 extends from the film supply spool to the film take-up spool 2 and has perforations 4 at regular intervals, / which in the direction of the film advance have the distance of the length of an image field from each other. A Electric motor 1, preferably a permanent magnet motor with a keel _ner Impedanz3 is with usual means (not shown) with the film take-up reel 2 connected. ·

Two spring arms 13 and I ¹ *, which are rigidly attached to the camera housing and, if this is electrically conductive, also electrically insulated, have two contact pieces 6 or 2 at their free ends. 9 on. A spring arm 5j designed as a contact piece and firmly connected to a claw 3 is also attached rigidly in the camera housing. One pole of a battery 10 or another power source is connected to the spring arm I ¹ J and thus to the contact piece 9. The other pole of the battery 10 is electrically connected to a connection of the electric motor 1 and to the spring arm 13 and thus to your contact piece 6. The other terminal of the electric motor 1 is connected to the spring arm 5 which is pretensioned so that it is in contact with the contact piece

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6 stands, because the claw 3 protrudes through one of the perforations H in the film 12. A cam 7 is mounted on a shaft 8 which is coupled to the shutter mechanism so that the cam 7 "rotates counterclockwise when the shutter is operated for an exposure.

Fig. 1 shows the film advance mechanism just before exposure is complete. The claw 3 protrudes through one of the perforations 4 in the film 12 and the spring arm * 5 -''is '' pretensioned on the contact piece 6, so that the supply lines of the ^ electric motor 1 through the spring arm 5, the contact _piece% _ 6 and the spring arm 13 are electrically short-circuited. When the exposure is finished, the shaft 8 rotates with the cam 7 counterclockwise. The cam 7 touches the spring arm 5 and lifts it, as in Fig. ' 2, the contact piece 6 and brings it into contact with the contact piece 9 · The battery 10 is now connected in series with the electric motor »1, which begins to drive the Filmaufwik- _A kelspulo 2 to the film 12 to be transported further. The movement of the spring arm 5 from contact with the contact piece 6 into contact with the contact piece 9 causes the claw 3 to lift out of the perforation k of the film 12. The film 12 can now be transported freely under the claw 3. The locking mechanism rotates the cam 7 clockwise as shown in FIG. When the cam J is rotated, the biasing force of the spring arm 5 causes it to remain in contact with the cam 7 until the pawl 3 contacts the surface of the film 12. A further rotational movement of the cam 7 has the consequence that it is released from contact with the spring arm 5, which is held in place by the claw 3 resting on the film surface

ment, the Fe of the arm 5 still touches the contact piece 9, ■ ' so that the circuit between battery 10 and electric motor 1 remains closed. The electric motor 1 drives the ' Film take-up spool 2 until the next perforation

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tion 4 is moved under the claw 3. Each _per-: foration IJ has from the previous perforation U exactly the distance of the length of an image field. The claw 3 now engages in the perforation 4, as shown in FIG. 1, and the Federara 5 returns to its normal position. The circuit between battery 10 'and electric motor 1 is now interrupted. The Federars: 5 is now again with the pressure of his coupling on the contact piece 6, so that the connections of the electric motor 1 are short-cut. The electric motor 1, which now acts as a generator with a high load, is started dynamically and stops immediately. The film take-up reel 2, which is driven by the electric motor 1, stops immediately so that exactly one image of the film 1 * 2- has been transported from the film supply reel 11 to the film take-up reel 2. ;

Although the device described above for film transport exactly the same length of filise for each cycle transported, it can transport more or less film if the perforations 4 are not punched into the film or if there is an R- * ß in the film. Bas in Fig. 5 to 7 shown second embodiment zei'jpjt a switching device that does not rely on the presence or location of perforations in the filura.

According to FIG. 5, in the camera housing (not shown) a film supply reel '-il * and a film take-up reel 2' are arranged, between which a film 12 'extends'. .-The -On Rückseite- ^"des-; film 12" * is an electrically "conductive" coating "16 ,. which can be made of silver for example ₃ in the form of a. The coating 16 has, at intervals of exactly one length of an image field, rectangular areas IT of a conductive coating, which continue with the coating 16.

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continuously connected and separated from the coating 16 r, ur edge 22 des Fili-.s 12 · extend. Opposite eggs. Surfaces 17 most often the coating lf> rectangular-outer-arur.rcen 15 on, the are not conductive, which are in the direction of the filir.feed et-K0S Finer than the researcher. 17 are us ?, not the panze Cover width 1-6 ears :.

An electric motor 1, preferably a Deuornc.nnetnotor with low impedance, is connected to the film winding spool 2 ¹ with the usual Mittr ^ rr (not 'rezeiri;). Two arms of fire ·.-I? ¹ and 1 * 1 ', which are rigidly attached to the camera housing, have zv: egg with d5esen firmly connected For: takt pieces 6' br-vj. ? ^! on. A spring arm 5 'is attached rigidly / rigidly in the Kairerar ^ hi "use. The spring arm 5 * is at its free end firmly with a transverse sliding 20 burdened. At the end 23 of the link 20 a contact piece 21 is firmly attached, the normally stands directly above the spring arm l ^ ¹ at a small distance from these. At the other end 2 ^ 1 of the link 20 is a contact piece 3 ¹ firmly attached. The contact pieces 3 '>6' and? ' wcrder / iby the spring arr.e 5 ¹ br.vi. 13 'bEW. lii' so pretensioned that ^ ίΓ · they * normally open on the. film 12 '. Di · .; contact piece 3' lies on the part of the coating 16, the de ^ edge 22 of the film 12 ^f on nSchsten liept. the contact piece? ' is rider from the edge 22 "as the contact piece 3 ', namely by so much that · it on the überzun 16 aüflier, but that it auflieft if it is not interrupted by the recesses 15 in the recesses 15;!; when these protrude into the coating 16. The contact piece 6 'lies closer to the edge 22 than the contact piece 3'', namely by so much that it rests on the flea 17, but never on the coating 16. A battery 10, or another. lh current source with one pole to the Federaris * -angeschlossen and thus to the contact piece 9 ^f .. the other pole of the battery

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is with-a connection of the electric motor. 1 and with the. , Peierarm 13 ^f and thus electrically connected to the contact piece 6 '. The other connection of the electric motor 1 is connected to the spring arm 5 'and thus to the contact pieces 3' and 21. A shaft 18 is coupled to the locking mechanism (not shown) and can be rotated thereby. A cam 7 made of electrically non-conductive material is attached to the shaft l8.v. and is rotated by this in the counter-clockwise direction when the connection " ¹ " has been actuated for an exposure. FJg. Figure 5 shows the film advance mechanism just before exposure is complete. The contact piece 9 'rests on the film 12.V in the recess 15. The contact piece 6 ¹ rests on the film \ 12 »in the surface 17 and is with. The contact piece 3 ', which rests on the cover 16, is thereby electrically connected. The connections of the electric motor 1 are electrically short-circuited by the spring arm 5, the contact pieces 3 'and 6 ¹ and ieri spring arm 13'. When the shutter mechanism has completed the exposure, we - the cam 7 rotates through the shaft "18 'in the counterclockwise direction (Fig. 6) and presses the spring arms 13' and \ · \ 'upwards so that the contact pieces 6' and 9 ' are lifted off the film 12 'and the contact piece IA ¹ - is brought into contact with the contact piece 21. The battery 10' is now connected in series with the electric motor 1, which begins to rotate the film take-up reel 2 'in order to close the film 12' transport.

The locking mechanism tensions, viie shown in Fig. 7, the cam 7 through the shaft 18, whereby the cam 7 rotates in the clock pointer sense. When the cam .7 is rotated, the biasing force of the spring arms 13 'and 1 * 1 · causes it to remain in contact with the cam 7 until the contact pieces 6' and 9 ^{1 come} into contact with the film 12 '.

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When the film 12 'is transported, the contact piece lies 6 'on a part of the film 12' that is not with Your coating 16 or "of the surface 17 is provided. The contact piece 9 'rests on the coating 16, so that the circuit between the battery 10 and the electric motor 1 still is always closed, "

The electric motor 1 drives the film take-up spool 2 'until the next recess 15 and the next surface 17 under the contact pieces 9' or. 6 'has been moved through ". When the contact piece 9' then rests in the recess''15, the circuit between the battery 10 and the electric motor 1 is interrupted. The contact piece 6' rests on the surface 17 so that the connections of the '' Electric motor 1'electrically through the spring arm 1-3 ', the contact pieces 3' and 6 ^! And the spring arm 5 ^{1 are} short-circuited '. The electric motor is braked dynamically and stops immediately is driven by the electric motor also remains available immediately, is .worden so that 'the Filmaufwickeispule 2 of c "ü ^v film supply reel 11'auf' transported exactly ein'Bildfeld the film 12th

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Claims (8)

- 10 - P at ent a π s ρ r ü ehe - ' Photographic camera-with one. Motor for the film - ';.' ν transport and a 'switch to the Afi and switch off; dos · motor to or from a power source .., thus ^ ekenn-. <indicates that for scanning a marking (^ j 15, -lC-y-17) of the film (12, 12 ') a device (3; 3% 6', ^ p 9 V) is provided which is connected to the switch - (3-i 5, 6, 3 ', 5', "" 6 '■', 9 ^r , 21) and with a braking device 6; 3 ^f , 6 ^f ) to brake the motor "- (-« IO so 'vq by rl "e- ■ marking door. '" · is that after transporting the fils uk em / vor- ^ rc- This part of the Kotor can be switched off and the BreriselnrleM-unr / r ^{j can be switched on} / on. - *: 2. The photographic camera of AnsxL'uch 1, characterized in that - "-as braking device, a contact (5, ^6; 3 ¹ ', 6' 5) is provided of the switch in the <switch position of the switch for switching off of the motor '(1) short-circuits it. ■' 3. Photographic camera according to claim 2, characterized in that the. Switches three contact pieces (5 ^ 6,3) on each side, 'of which a first contact piece (9)' with · '· "' ^: one pole of the power source (10) and individual contact piece (6) are connected to the second pole of the Stromquelle.und'mit a connection of the Hotors (1) and from ~: \; v; i ·.? ·: im; trdeis secondR ß ^ sehluÄ des Hotors ver, r = ujr; ri: j which a third 'contact piece (5) alternatively with derri first or 'second contact piece (5)' 'Connectable 1st'. ^ ' 4. Photographic camera according to claim 3> characterized in that as a device for scanning as markings serving perforations (4) of the film a probe element (3) is provided, which is connected to the third contact piece (5) arranged on a spring arm. 009814/131% ^r - to is that in the resting of the feeler member on the pjlir, and when the bias voltage dos Federarrees following dip de s Tantaliodes. (3) into a perforation ⁽¹ O of the, film (3 2), the third contact member (5), the first contact piece ( ?) tsw. touches the second contact piece (6) and that a cam (7) coupled to the shutter of the camera is provided, engages the spring arm and briefly exposes the third contact piece (5) to the first contact piece ( 9) presses .. 5. Photographic camera according to claim 3 or ^ i thereby characterized in that each of the contact pieces (5, 6, 9) is arranged on a spring arm (5, 13, 1Ί). 6. Photographer! See camera according to one of claims 1 to 3, characterized in that the contact piece of the switch on the film (12 ') is an electrically conductive coating (16) is provided as the markings of the Film has irregularities (15, 17). 7. Photographic film "for a camera according to claim 6, characterized in that the film (12 ¹ ) has an electrically conductive coating provided with irregularities (15, 17). 8. Photcgraphischer "Fi lia according to claim 7, characterized in that that the irregularities (15, 17) are arranged in accordance with the image fields of the film. 0098U / 1319 . ■■■■■■ * · ■ »■■■ lee rs e ι te