摘要:
In an automatically focusing camera, the lens is driven to infinity during film winding and the film winding spool is blocked when film winding is completed. Upon shutter release actuation of the camera, film winding is unblocked when the automatic focusing circuit energizes a first magnet and lens rotation is blocked at the focused position when the automatic focusing circuit energizes a second magnet. A single control member operates to effect blocking of the film winding mechanism and to drive the lens to infinity when rotated in one direction, and to unblock the film winding mechanism when rotated in the opposite direction.
摘要:
The present invention relates to an electromagnetically driven shutter device for camera, so designed that a detecting means for detecting the displacement speed of the shutter member and the power supply means for supplying the driving energy to the shutter member are provided in such a manner that the output of the power supply means is varied in accordance with the output of the detecting means so as to maintain the displacement speed of the shutter member constant.
摘要:
A camera having an electromagnetically driven shutter provided with a counter capable upon counting a present number producing a signal. Each time the shutter is closed, the counted value is changed, while the period of actuation of the shutter is controlled to effect a predetermined fraction of an exposure, so that a continuous sequence of shots equal in number to that preset in the counter are taken automatically.
摘要:
A flash device of the type in which the flash tube is coated with a trigger electrode and is positioned in contact with the back metal constituting part of the reflector so that when the trigger signal is applied directly to the back metal, the flash tube is triggered. In this type of flash device the back metal constituting part of the reflector is configured to a round shape. Because of the necessity of insuring good light distribution it is generally made of bright alloy aluminum. This not only makes it difficult to finely adjust the position of the flash tube relative to the back metal and electrically connect the trigger wire lead with the back metal, but also gives rise to a problem of electrically insulating the back metal from the other metallic parts since a very high voltage for triggering is applied to the back metal. The present invention provides a flash device which has solved the various problems by providing the back metal with embossed portions to adjust the position of the flash tube, by pressure-setting the connection of the trigger wire lead with the back metal, and by applying an electrically insulating coating on the back surface of the back metal.
摘要:
A device for loading film wherein the narrow leader of the film is wound up on a takeup spool having a frictional member provided in a portion of the outer periphery thereof, while its edge opposite to that which has perforations is pressed against the frictional member, whereby the film leader is impelled towards the flank of the spool as the inside edge of the film leader on the aforesaid frictional member moves faster than the opposite edge. After one turn of the film leader around the spool, the outer corner of the end of the film leader is conducted so as not to engage perforations of the following area of the film.
摘要:
In a camera capable, upon actuation of a film rewind release member, of cutting off the manual or motorized driving torque from the winding transmission system to render the winding operation impossible, while simultaneously rendering the manual or motorized rewinding operation possible, the rewinding device is provided with means responsive to the actuation of the film rewind release member for cutting off the various charge mechanisms from the manual or motorized driving torque transmission system.
摘要:
In an apparatus such as a camera which automatically performs film winding and rewinding by means of a motor, an automatic rewinding circuit is arranged to detect interruption of a winding action by means of a timer circuit which is set at a length of time longer than a predetermined length of winding time. Upon detection of the interruption, the automatic rewinding circuit automatically shifts the winding action to a rewinding action. The apparatus is also provided with a memory storage which mechanically memorizes the operating state of the automatic rewinding circuit or with a forced rewinding device which permits a rewinding operation irrespective of the operating state of the automatic rewinding circuit.
摘要:
The present invention relates to manufacturing process of seamless metal tubes by elongating mill such as Mannesmann mandrel mill. Shells are subjected to rolling operation with main object of wall thickness equalization by means of a rotary mill having 3 rolls without any internal tools such as mandrel bar or plug. This process improves wall eccentricity and enables to decrease the number of billets as materials for tube making.
摘要:
Disclosed is a sound motion picture projection apparatus in which a head pad is urged by a spring member toward a film pressing position at which position the head pad presses a film against a magnetic head disposed along the sound recording and reproducing film path. The apparatus has a set mechanism of the self-holding type which sets the head pad against the urging force of the spring member to a film pressure releasing position at which position the head pad releases the pressing of the film, by the driving force of a driving motor and keeps the head pad to that position. The apparatus further has a film detecting member which is disposed in said sound film path after the magnetic head and operatively connected with the set mechanism in such a manner that the holding of the head pad at the film pressure releasing position by means of the set mechanism is released when the film detecting member detects the film introduced into the sound film path and thereafter the setting operation of the set mechanism is made ineffective as long as the film detecting member detects that a film exists in the sound film path. Thereby when the set mechanism is driven by the driving motor when no film exists at least in the sound film path, the head pad is automatically set to the film pressure releasing position and then the head pad is automatically changed from the film pressure releasing position to the film pressing position when the film detecting member detects the introduction of the film into the sound film path.