DE1992850U - DEVICE FOR AUTOMATIC CLEANING OF BATTERY CONTACTS IN PHOTOGRAPHIC AND KINEMATOGRAPHIC CAMERAS AND FLASH UNITS. - Google Patents

Description

Kodak Public Company

Stuttgart - cheeks

Hedelfinger Strasse 54, 60 and 70 - December 1st, 1967

EM 658

Utility model registration

• Device for automatic cleaning of battery contacts in photographic and cinematographic Cameras and flash units

The present innovation relates to photographic and cinematographic cameras and flash units with an or several built-in chambers for batteries, which are used to power electrical and / or electronic components and for the purpose of cleaning the contact points of contact springs and battery contacts are equipped with an automatic device.

The contact surfaces on batteries and their current-consuming contact springs are made of metal and are subject to constant surface oxidation, which increases the transition resistance

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can increase the fact that puncture disorders occur even with a new battery, i.e. a fresh battery, but a longer period of non-use. Around To prevent these disturbances, it is recommended to use the contact surfaces to clean regularly.

It is already known to maintain a constantly good contact in a circuit arrangement with usable ble electrical components whose contact lugs with the Counter contacts of the network built into a housing come into contact after the installation of these components, by means of a switch button a relative movement between contact lugs and mating contacts at the same time as switching on execute the switching arrangement.

Here, accordingly, a button is manually operated that closes or opens a switch in the circuit. This means, however, that the person operating the device is additionally burdened and, as a result, the ease of use of the device gets worse. If, on the other hand, the button forms the camera shutter release at the same time, this means that the shutter release button is additionally burdened by actuating the button and mechanically more difficult or "rougher". But that is just undesirable with a camera.

The innovation is therefore based on the task of eliminating the need for manual cleaning and eliminating the susceptibility to faults due to contact difficulties on the battery contacts themselves by means of an automatic device. 'V ₅ - ..

This was renewed according to the mentioned camera types as well Flash units solved in that control means a relative movement cause between the batteries and their contacting holders, and that the control means of for the Preparation of the puncture and / or readiness for exposure necessary Actuations and / or functions can be moved to en.

What the solutions have in common is that from time to time they are inevitable necessary activities, such as flashing lamps or Flash cube change or the film cassette change can be used to move devices that the critical Automatically clean contact surfaces through forced relative movements.

Further details can be found in the exemplary embodiments shown in the drawing and in the claims.

Pig. 1 shows a plug-in socket for a flash lamp and a battery chamber , the flash lamp not being shown locked in place;

2 shows a socket for a lightning cube with a battery chamber arranged underneath and a half-inserted lightning cube;

Pig. 3 shows a motion picture camera, the housing of which is shown partially open for the purpose of illustration and thus reveals the Pilm cassette chamber and two separate battery chambers.

The mode of operation of the exemplary embodiments is to be explained below with reference to the drawing?

According to Pig. 1, a flash lamp 1 or, according to FIG. 2, a flash cube 2 is inserted into the corresponding lamp socket 3 of a flash device shown partially inserted .. The flash unit has a battery chamber 4 built into the camera housing 5.

During this insertion, the control pin 6 is pressed against the battery, which is thereby in its contact-making holder and 9 moved by compressing the spring leg 8 a.

As a result, the battery contact points 7 a and 7 b are opposite the contact springs 8 and 9 are forced to a scraping relative movement and the contact points clean themselves automatically. When changing the flash lamp 1 or the flash cube 2, the battery 7 springs under the action of the spring leg 8 a every time back to its starting position * because the control pin 6, for example, with the help of a compression spring surrounding it 10 each dodges. In this way a perfect current flow is ensured for every flash exposure ο

With a cinematographic camera, the contact cleaning is done reached at the contacts of the batteries 16 and 17 by means of the film cassette 11, as Figo j5 shows. Here are the Contact springs 12 and 13 provided for the battery 16 * those of the Power supply, for example, a built-in measuring mechanism or exposure controller is used. The contact springs 14 and 15 are for the contact-making holder of the batteries 17 is designed to drive the cinema camera. The contact springs 12, 1>, 14 and 15 now have brackets 12 a, 13 a, 14 a and I5 a projecting into the film cassette space. When inserting a film cassette 11 the contact springs are moved relative to the battery contacts by means of these brackets and cleaning is therefore carried out automatically made by scraping the oxidation points.

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The pressure of the cassette takes place when the corresponding housing part is closed in a known manner and is not shown in FIG. The one for moving the contact springs 12, 13, 14 and 15. necessary pressure is lower than that acting on the cassette. Force. This is a perfect storage of the cassette in terms of
F'ilmbahn guaranteed.

Claims (6)

RA.697 627-8.12.67 S chut ζ an s check 1. Photographic or cinematographic camera or flash unit with one or more chambers for batteries, which are used to supply electrical and / or electronic components, characterized in that control means cause a relative movement between the batteries and their contact-making holders, and that the control means for the preparation of the readiness for puncture and / or receptivity.necessary operations and / or Functional processes are moved. 2. Apparatus according to claim 1, characterized in that control means, for example from a control pin (6) between flash lamp or flash cube socket (3) and the battery chamber (s) (4) are provided, and that this control means by insertion the flash lamp (1) or the flash cube (2) have a contact-cleaning effect. 3. Device 'according to claim 1, characterized in that Control means are provided between the space for a film cassette (11) and the battery chamber (s) which by inserting the film cassette (11) an automatic contact cleaning at the contact points between the Carry out battery contacts and the contact and / or holding means (12, 13. 14, 15). - 4. · Device according to the claims. 1 to 3, characterized in that that a control means designed as a control pin (6) with a compression spring (10) as a return means Is provided. 5. Device according to claims 1 to 3 «characterized in that that the contact and / or holding means (8, 12, 13, 14,. '1.5) for the batteries (7, 16, 17) are so designed are that the control means (s) is or will be brought into its or their starting position (s) again and again. 6. Device according to claims 1 and 3 * characterized in that the battery contact and / or retaining springs (12, 13, 14, 15) brackets (12 a, 13 a, 14 a, 15 a) have the ¹ when inserted the film cassette (11) the contact springs (12; 13, 14, 15) relative to the batteries (16, 17 ^ move, and that thereby a scraping movement is carried out on the contact surfaces. 7 · device according to the claim I _3, characterized in that _a Batteriekontakt- and / or retaining springs (12 _S 13, 14, 15) are moved relative to the battery contacts by control means that an operative connection with examples. for example the pilm lamp key or a control pin in the tripod thread.