Abstract: A camera, such as a single lens reflex camera, having a focal plane shutter and an interchangeable lens incorporating a diaphragm system, and provided with a control system for taking photographs using an electronic flash, in which the diaphragm system may be operated as an opening and closing shutter system as well as for providing the working aperture upon moving the focal plane shutter to fully open position to expose the film window, such that when the focal plane shutter release button is actuated, the focal plane shutter is moved to fully open position, and under the influence of the control system, the opening and closing system opens the aperture to a preselected width for a brief interval, e.g. 1/125 sec.

Abstract: An apparatus for supplying polishing and/or cooling liquid, including a storage container preferably removably supported on a supporting frame, a downwardly facing dished cover for the container pivotally mounted on the frame by a hinge joint assembly and having a bent-over edge whose outer peripheral dimension is slightly smaller than the corresponding inside peripheral dimension of the upper edge of the container to provide a clearance gap therebetween, with the cover supporting thereon various elements such as a discharge pipe and a pump assembly for conveying liquid from the container as well as a mechanism for varying the temperature of the liquid, and stops on the cover and hinge joint assembly, respectively, for determining the range of movement of the cover between closed and open positions relative to the container.

Abstract: A control device independent of and designed for use with professional cameras for operating an electromagnetically drivable shutter or magnetic shutter and for determining and setting exposure values, wherein the device includes a power source and means for determining and setting exposure values, both of which are exchangeably or detachably connectable operatively via the control device to the magnetic shutter and to a light measuring or metering probe, the means for determining and setting the exposure values being adjustable to operate in a plurality of selective functional modes.

Abstract: Photographic camera shutter apparatus having at least one drivable control part arranged for reciprocation for controlling the photographic light admitted to the camera, e.g. a diaphragm aperture ring or a shutter blade ring, and an electromagnetic driving system for reciprocating the control part, including at least one corresponding assembly having opposed coacting reciprocally energizable electromagnetic field coils stationarily arranged in spaced apart relation and providing an intervening magnetic field space therebetween and movable permanent magnets arranged for reciprocation along such intervening field space in response to the corresponding energization of the stationary field coils and operatively connected for driving the control part in question concordantly for reciprocation thereof, whereby to control the photographic light admitted to the camera in dependence upon the energization of the field coils.

Abstract: A device for setting or controlling shutter exposure time and diaphragm working aperture size on cameras having a lens shutter assembly with a reciprocating shutter sector system for opening and closing the lens passage and a diaphragm segment system which is also suitable for closing the shutter opening of the lens passage, the sector system and the segment system both preferably being independently driven by corresponding electrodynamic drive units selectively controlled by an electronic control circuit incorporating a microcompouter, such that first the diaphragm segments are driven at comparatively low driving energy or speed to define a manually or automatically predetermined size working aperture, then the shutter sectors are moved to open the lens passage for exposing the film, and thereafter the diaphragm segments are again driven but at comparatively high energy or speed, commencing at a selectively timed interval after the movement of the shutter sectors to open position, whereby to close the lens p

Abstract: Machine for grinding and polishing workpieces having a spherical surface, such as spectacle glasses, optical lenses, and the like, including a workpiece support disposed for rotation about a generally vertical axis for mounting the workpiece for exposure during the machining operation to the action of a work tool operatively applied under pressure against the workpiece for carrying out such action, the workpiece support having a spherical workpiece receiving surface provided with a predetermined radius of curvature generally corresponding to that of the spherical surface of the workpiece to be operatively mounted thereon and situated such that the center of the radius of curvature coincides with the rotation axis of the workpiece support, a work tool holder such as a pressure spindle sleeve for operatively holding the work tool for carrying out the grinding and polishing action and for maintaining the work tool against the workpiece under the applied pressure, a rocker connected to the work tool holder to for

Abstract: Electromagnetically operated camera shutter includes a pivotally mounted shutter blade actuating ring having a radially directed arm and driven from closed position to open, an electromagnet having an electromagnetically responsive external anchor and mounted for movement from a remote to a proximate position with respect to the electromagnet in response to energization of the electromagnet and disposed to provide a closable gap, and an actuator arm directly interconnecting the anchor with the ring and movable for driving the ring from closed to open position, and with a cylindrical housing arranged to provide an annular space between itself and the ring for disposing the electromagnet and anchor, and with the arm in the form of a curvo-linear actuator arm fixedly carried on the anchor and arranged in the space for acting against the radially directed arm at a displaceable point, and particularly with such actuator arm being of similar curvature to that of the space and sized to permit unhindered movement wit

Abstract: A shielding device for the protection of human embryo cells from the effects of radiation during examination by X-ray comprising a radiant absorbent protective screen rotatably secured to a supporting frame, the screen including a central protective plate of predetermined shape; a first plurality of protective displaceable sheets, a second plurality of protective sheets associated with said first protective sheets mounted in pairs and being rotatable on one pair of said first sheets and adjusting means to linearly displace the first protective sheets to vary the covering surface area of the screen.

Abstract: The disclosed invention embodies a unique control for cocking and then releasing the shutter blades covering the lens structure of a photographic camera unit. The shutter blade operating mechanism is supported within a housing in which there are provided a pair of slotted regions through which extend control levers used to provide, when moved, the operational control needed to cock or release the blade structure relative to the photographic lens proper. Each control lever is provided at its end portion with a form of identification and conjoint means operable therewith and having a concordant form of identification so that through observation it may immediately be determined by an operator in which of two operational states the camera is instantaneously conditioned. Provisions are made for interlocking and coupling the controlling levers relative to each other, as well as to return each lever to its original position following a release.

Abstract: A camera shutter that has an electronic timing device and a photo-electric resistor and associated capacitor timing circuit; a charge starting contact is actuatable to commence the timing circuit action, and an electro-magnetically actuated locking device energized by the timing circuit to hold the shutter blade system open for the duration of the exposure time as determined by the photo-electric resistor. In addition, a mechanical device is provided which acts to delay the opening movement of the driving mechanism of the shutter blade system after actuation of the contact by an amount to compensate for the time taken by the electro-magnetic locking device to move to an unlocking position after the magnet thereof is de-energized by the timing circuit.

Abstract: A camera is provided having an electronic timer controlled by ambient light. There is provided an electromechanical delayed action stop for the shutter. An electronic delay device is provided for temporarily delaying the action of the shutter of the camera after it has been released. An electronic switching device is provided including a signal lamp which is connected to the two poles of a battery. The switching device is so controlled in dependence upon the action of the delay device tht the signal lamp emits a distinctive light signal during the action of the delaying device and the subsequent exposure. A flashing circuit is arranged to provide a flashing signal during the delay period, the circuit being arranged to operate the lamp continuously during the exposure period.

Abstract: This invention is directed to the control of a camera shutter mechanism by means of a pair of resilient control members. A first control member in the form of a fast acting spring is attached to the camera base member and, with operation initiates at a relatively low speed to provide an initial movement of the shutter control and overcomes the inertia of the mechanism and initiates its movement from a state of rest. This effect is preferably followed by a second effect provided by a second driving spring to achieve a substantially uniform movement of the mass of the mechanism first actuated, with the second driving spring acting continuously, following the initial operation, upon the shutter mechanism after a change from a rest position to one of movement.

Abstract: A photographic camera shutter is moved to open and returned to its closed position by electromagnetic actuating means. A special electronic circuit is connected with said actuating means to energize the electromagnetic device with sufficient potential to cause a smooth and rapid opening movement which then decreases to a lower potential during the time interval that the shutter is to be maintained in its open position.

Abstract: A camera shutter assembly is provided having segments which may be moved by electro-magnetic means. The diaphragm blades are also provided with electro-magnetic means and there are mechanical intermediate members so that the blades can be moved into an open position. Subsequently, the blades can be closed to a predetermined aperture setting by spring means. By these means the photographer can move the shutter segments and the diaphragm blades into open positions and thereafter back into their original positions to make intermediate observations from a single location.

Abstract: This invention is directed to a slit shutter type of photographic camera which provides one cover system which would uncover the normal camera image window and another cover system following the first in operation after a selected and suitable time delay which will cover the window again. Each of the cover systems includes a folding blind and a means to fix the blind at one end and a rigid rail means connected at the other end to form one edge of the slit. There is also means to displace the rail along a substantially straight line.

Abstract: This invention is directed to a photographic camera having a slit shutter which utilizes two cover systems which operate above the plane of the image. These systems are movable perpendicularly to the direction of movement of the film within the camera. Each cover system comprises displaceable segments movable relative to each other. These can be brought into and out of overlapping position at a corresponding opposed end of the image window. When open, they extend across the window to cover the window, and when closed they recede into overlapping position to uncover the window. While broadly speaking, the so-called "slit shutter" type of shutter has been used, the herein described proposal for providing the open and closed systems is unique.

Abstract: The described invention relates to a focal-plane shutter for a photographic camera. This shutter is a slide system having a plurality of parts which move in timed sequence during exposure. The parts include a plurality of sliders which are displaceable relative to one another.This invention provides a form of focal-plane shutter for a photographic camera wherein there are slide systems which function during exposure in timed succession with each system having a plurality of slides which are movable relative to one another. Each of the slide systems has a driven element which is rectilinearly guided by a single rotatably mounted part held in operational engagement with each individual slide system in such a manner that the slide participating in forming the focal-plane slit width engages its driving part at a point which is at the maximum possible radial distance from the axis of rotation.