Abstract: A novel meter is provided for measuring erythrocyte settling rates. It includes (a) a base supporting rack adapted to hold an array of tubes at an optimum settling angle and at least one tube adapted to contain blood samples, the tube including a window of predetermined length at the upper end thereof, the window permitting passage of ambient light therethrough. A timer is provided which is actuated by the passage of ambient light through the window when the tube contains blood, to determine the erythrocyte settling rate. This timing is achieved by signalling that a preset period of time has elapsed between when a minimum amount of light passes through the window, indicative of the presence of erythrocytes in the area of the window, and when a maximum amount of light passes through the window, indicative of the substantial absence of erythrocytes in the area of the window. By this invention, a blood test may be done in 5 to 15 minutes.

Abstract: A tool holder for supporting a tool and the tool holder for being supported by the belt of a worker, the tool holder is formed from a length of material, such as a length of galvanized, mild steel, with the end portions of the material formed into a configuration, such as a generally inverted U-shaped configuration, for permitting the tool holder to be attached to the belt of the worker, and with the intermediate portion of the material formed into a configuration, such as a generally circular or convoluted configuration, for receiving the tool whereby the tool is supported by the tool holder.

Abstract: An exposure controller for a camera effects a correction of exposure toward overexposure by automatically displacing the point in time when an exposure period is determined, whenever there occurs a difference in the brightness between a main subject to be taken and its background, which exceeds a given value, as a result of rear lighting or the like. In this manner, it is assured that the subject be photographed with a proper exposure.

Abstract: A photometry controller is provided for a camera having an electronic flash controlling capability and capable of photometry of reflection from film surface. The controller is operative, whenever the difference in the brightness between a main subject and its background exceeds a given value, to delay the timing when the integration of a photocurrent is to be initiated by a given time interval after the initiation of an exposure triggered by a shutter release in an automatic manner, thus allowing the proportion of the integrated flashlight from the electronic flash relative to natural light to be increased.

Abstract: A camera with a lens protective cover includes switching means which turns a power supply of an electronic flash on to establish a flash photography mode for the camera, and a connection mechanism providing an operational connection between the switching means and the lens protective cover. When the lens protective cover is closed while the switching means assumes a position in which it establishes a flash photography mode, a movement of the cover causes the switching means to be automatically returned to a photographing mode other than the flash photography mode.

Abstract: An electrophotographic copying process utilizes a photosensitive member for electrophotography which comprises a first and a second photoconductive layer which are sensitive to radiation of a first and a second wavelength region, respectively. The photosensitive member may be subjected to steps of imagewise irradiation simultaneously with charging, then inverse charging, then uniform exposure and the like to form a positive or a negative electrostatic latent image. The electrostatic latent image thus formed is repeatedly subjected to a developing and a transfer step to produce a number of copies.

Abstract: An electrophotographic copying process utilizes a photosensitive member for electrophotography which comprises a first and a second photoconductive layer which are sensitive to radiation of a first and a second wavelength region, respectively.

Abstract: A reflex photometric assembly for a camera is integrally formed of a reflecting member for directing light reflected by a shutter blind and a film surface to a photoelectric transducer element for photometry and a shield member for preventing the light reflected by the shutter blind and the film surface from directly impinging upon the photoelectric transducer element so that both the reflecting member and the shield member can be accurately positioned in relation to the photoelectric transducer element without need for further adjustment.

Abstract: A magnetic head for vertical magnetization recording comprises a pair of magnetically coupled limbs one of which has a reduced reluctance, the other limb comprises a laminated structure comprising a magnetizable material of a greatly reduced thickness held between nonmagnetic materials. The exposed end face of the magnetizable material is disposed for abutment against a magnetic record medium to serve as a record/playback pole.

Abstract: An electrophotographic copying process utilizes a photosensitive member for electrophotography which comprises a first and a second photoconductive layer which are sensitive to radiation of a first and a second wavelength region, respectively.

Abstract: A housing with frangible locking elements includes at least one body portion having a cavity for containing an electrical, hydraulic or pneumatic fittig therein. The housing is provided with at least one tongue-like element engageable, in locking fashion, with at least one seating area provided by another housing, a plate or a supporting structure. Once the hook-like end of the tongue is engaged on the seating area, the housing may only be removed from service by destruction of the frangible tongue-like element, indicating visually that unauthorized tampering has taken place. One embodiment of the invention includes housings having living hinges, lockable to form the fitting containing cavity, by utilizing another hook-like shaped tongue element, engageable on a seating area on an opposed marginal edge of the housing. Another embodiment includes the ability to dispose the housing, in selected spaced-apart distance relationship from a mating housing, plate or supporting structure.

Abstract: A cylindrical housing with either substantially straight or with inwardly tapering sidewalls is formed with a bottom portion that either tapers or curves inwardly until it meets a flat bottom area. A bracing section is connected within the housing to support a motor with fan or propeller blades operated thereby below the open top of the housing and above the bottom portion thereof. A plurality of openings are formed around and through the side wall above the bottom portion but below the motor so that when the housing is disposed in a body of water, and the motor operated, water from within the housing is directed upwardly to the surface of the body of water and additional water is drawn into the housing through the openings of the housing sidewall.

Abstract: A remote-control assembly for controlling a crane or the like which completely insulates the operator of the remote-control assembly from electric shock. The remote-control assembly includes a remote-control box having a plurality of fluid valves, a converter box including a plurality of pressure switches, and a plurality of fluid lines connecting the fluid valves to the pressure switches. The pressure switches are electrically connected to an electric plug which is adapted to be connected to the electrical control box on the chassis of the crane for operating the crane.