Abstract: In a wound golf ball comprising a wound core having thread rubber wound on a center to form a thread rubber layer thereon and a cover around the wound core, the center has an optimum combination of a diameter A of 26-32 mm with a specific gravity D, the thread rubber layer is formed of inorganic filler-loaded thread rubber and has a specific gravity in the range of 0.93-1.05, and the cover is formed of an inorganic filler-loaded resin and has a specific gravity in the range of 1-1.4. The ball is improved in flying distance.

Abstract: An automatic focusing system for a still video camera has a light detector for outputting an image signal corresponding to an intensity of light which is incident on the light detector. An image signal is output for each of a plurality of colors of light that are incident on the light detector. The autofocusing system also includes a processor for determining the value of an AF signal corresponding to the focus condition of each of the image signals. A controller executes the autofocus operation. The AF signal having the highest value is used by the controller to execute the autofocus operation.

Abstract: A golf ball is prepared by forming a cover of two layer structure consisting of an inner layer and a thin outer layer on a core by heat compression molding. A color difference .DELTA.E in Lab color space between the inner and outer layers is up to 3. Tracks of seams and streaks on the inner layer at the parting line are visually unperceivable, and the ball is good looking.

Abstract: The invention provides a wound golf ball comprising a liquid center in the form of a center bag filled with a liquid, a thread rubber layer, and a cover. The liquid is based on water and has a viscosity of 1 to 500 centipoises at 20.degree. C. The liquid center has a diameter D of 26-32 mm. The relationship: (A.times.B)/D.ltoreq.4.5 is met wherein A is a gage as expressed in mm and B is a hardness on JIS A scale of the center bag. A hysteresis loss of up to 7% is recorded when the liquid center is deformed to 50% of its diameter. The ball has a pleasant hitting feel and a reduced spin rate, and travels a longer distance.

Abstract: The present invention provides a thread-wound golf ball comprising a thread rubber ball prepared by winding thread rubber around a spherical solid center and a cover enclosing the thread rubber ball therein, wherein the solid center satisfies the following equations (1) to (3):.alpha.=26 to 34 (mm) (1)10.0-0.25.alpha.(mm)<.beta.<13.0-0.25.alpha.(mm) (2).gamma./.alpha.<0.11 (3)where .alpha. is the diameter of the solid center, .beta. is the deformation of the solid center under a load of 30 kg at room temperature, and .gamma. is the deformation of the solid center frozen through the use of dry ice as measured 1 minute after application of a load of 50 kg to the frozen solid center at room temperature. The thread-wound golf ball has stable quality due to an undeformed solid center and provides a long travel distance through the use of a large-diameter, low-hardness solid center.

Abstract: A battery accommodating chamber structure includes: a battery chamber substantially in the form of a half cylinder and having a battery inserting opening through which a cylindrical battery is loaded in or unloaded from the battery chamber by moving it in a direction perpendicular to the axis of the battery chamber; and a battery lid pivotally coupled to the battery chamber through a shaft which is in parallel with the axis of the battery chamber, to open and close the battery inserting opening. In the structure, the shaft is so arranged that, when the battery lid is opened by turning it about the shaft, at least a part of the battery cover is caused to go into the battery chamber. The battery accommodating chamber structure is free from a difficulty that the battery lid is lost or damaged, and the battery can be readily removed from the battery chamber with simple structure.

Abstract: A thread wound golf ball comprises a solid center and a wound core having a thread rubber layer formed by winding thread rubber around the center and a cover enclosing the wound core. The cover is based on a non-yellowing thermoplastic polyurethane elastomer, and the difference in specific gravity between the center and the cover is 0.2 or less.

Abstract: A thread wound golf ball comprises a liquid center and a wound core having a thread rubber layer formed by winding thread rubber around the center and a cover enclosing the wound core. The cover is based on a non-yellowing thermoplastic polyurethane elastomer, and the difference in specific gravity between the center and the cover is 0.2 or less.

Abstract: A thread-wound golf ball manufactured by concurrently winding a pair of rubber threads spaced 1-7 mm apart from each other on a core to form a wound core, which is then enclosed with a covering material. The covering material reliably penetrates into a rubber thread layer, thereby achieving an improved bonding strength between the covering material and the rubber thread layer. Durability of the golf ball is enhanced and the time period required for winding threads is considerably reduced, resulting in an improved productivity.

Abstract: The present invention provides a thread-wound golf ball comprising a thread rubber ball prepared by winding thread rubber around a spherical solid center, and a cover enclosing the thread rubber ball therewith, which has a number of dimples of from 350 to 500 and a dimple volume rate of 0.76 to 0.9 percent, and wherein the solid center has an outer diameter of from 27 to 38 mm, a deformation under a load of 30 Kg of from 1.5 to 3.5 mm and a rebound, when dropped from a height of 120 cm, of at least 96 cm. The thread-wound golf balls of the present invention show good spin properties in addition to good restitution properties, resulting in improved travel distance.

Abstract: In a wound golf ball comprising a wound core (3) having thread rubber wound on a center (1) to form a thread rubber layer (2) thereon and a cover (4) around the wound core, the thread rubber layer (2) consists of an inner lamina (2a) of lightly wound thread rubber, an intermediate lamina (2b) of tightly wound read rubber, and an outer lamina (2c) of lightly wound thread rubber. The inner lamina occupies 10-35% of the tread rubber volume, the intermediate lamina 35-70% of the tread rubber volume and the outer lamina is 45% of the tread rubber volume. The inner and outer lamina have an elongation which is at least 40% lower than the elongation of the intermediate lamina.

Abstract: A thread wound golf ball is provided comprising a liquid center having a center bag filled with a liquid, thread rubber, and a cover. The center bag is filled with 8-12 cm.sup.3 of the liquid containing at least 55% by weight of water. The ball is improved in initial speed and travels an increased flying distance.

Abstract: A wound golf ball includes a liquid center consisting of a center bag filled with a liquid, thread rubber wound on the liquid center, and a cover. The center bag is formed of a rubber composition comprising a base rubber, an inorganic filler, and a process oil having a pour point of up to 0.degree. C. The content of the process oil is limited to 5 to 18% by weight of the content of the inorganic filler. The ball is improved in flying distance at low temperature.

Abstract: A wound golf ball comprising a liquid center, thread rubber wound thereon, and a cover enclosing the wound center, whereinsaid cover has a multi-layer structure having a total thickness of 1.0 to 4.0 mm and including an outer layer having a first hardness and a thickness of 0.4 to 3.0 mm and an inner layer having a second hardness higher than the first hardness, the outer layer of said cover being formed of a first resin having a Shore D hardness of 40 to 55, and the inner layer is formed of a second resin having a Shore D hardness of 55 to 68, the difference in hardness between the first and second resins being at least 5 in Shore D hardness.

Abstract: A wound golf ball including a liquid center (4) in the form of a rubber bag (2) filled with a liquid (3), a thread rubber layer (5), and a cover (6). The filling liquid of the liquid center is a liquid having water-insoluble powder dispersed therein so as to have a specific gravity in the range of 1.08-1.70 and a viscosity in the range 1-6,000 centipoise at 23.degree. C. The water-insoluble fine particles are present in the range of 4-60% by weight of the liquid dispersion. By improving the filling liquid, the wound golf ball is increased in flying distance while maintaining its own controllability.

Abstract: In a wound golf ball comprising a solid center (1), thread rubber (2), and a cover (3), the cover has a multi-layer structure including an outer layer (4) and an inner layer (5) having a higher hardness than the outer layer. The outer layer (4) is 0.4-3.0 mm thick, and it is formed of a first ionomer resin having a Shore D hardness of 40 to 55. The inner layer is formed of a second ionomer resin having a Shore D hardness of 55 to 68. The difference in hardness between the first and second ionomer resins is at least 5 in Shore D hardness. The ball affords improved spin and durability.

Abstract: A thread-wound golf ball having a liquid center wound by rubber thread and further having a cover placed thereon, characterized by using as the major component of the cover an ionomer whose JIS-C hardness is 70-85, making the thickness of the cover 1.0-1.8 mm, making the outside diameter of the liquid center 27-30 mm, making the center bag hardness of the liquid center 44-62 (in terms of JIS-A hardness), and making the thickness of the center bag 1.8-2.3 mm.

Abstract: An apparatus for driving an image pick-up device is provided with arrays of photoelectric elements, and vertical transfer portions are located adjacent to the arrays of photoelectric elements. A photographing lens for forming a focused image of an object to be photographed on the light receiving surface of the image pick-up device, a release device for performing a release operation, and a diaphragm device having a diaphragm for adjusting the quantity of light incident upon said light-receiving surface of the image pick-up device are provided. The diaphragm is normally fully closed but when a release operation is commenced, the diaphragm device opens the diaphragm to a predetermined diaphragm value, and fully closes the diaphragm in accordance with a predetermined stop-down speed after a completion of the exposure.

Abstract: A rangefinder for detecting a distance of an object from the rangefinder by employing a triangular measuring system has a radiation emitter to emit infrared radiation towards the object; a position detector having a close-range detecting reglon and a remote-range detecting region, which are separate and independent of each other; a close-range converging lens for focusing the radiation reflected by the object on the close-range detecting region, when the distance of the object from the rangefinder is smaller than a predetermined distance; and a remote-range converging lens for focusing the radiation reflected by the object on the remote-range detecting region, when the distance of the object from the rangefinder is greater than a predetermined distance.

Abstract: An apparatus for driving an image pick-up device having a pulse signal output device which outputs transfer pulses for transferring signal charges accumulated in the light receiving portion of the image pick-up device to vertical transfer portions. The apparatus includes read pulses for reading the signal charges transferred to the vertical transfer portions, sweep pulses for sweeping the signal charges transferred to the vertical transfer portions, and a controller for controlling these pulses. The controller controls the time at which the pulses are outputted. A device may be provided for selectively switching between first and second transfer pulses to be input to the image pick-up device. The first transfer pulses come from the pulse signal output device and the second transfer pulses come from the controller.