Abstract: A block toy has a plurality of regular hexahedral blocks each having a relief side having a relief surface, a printed side having a printed surface, and an apertured side having an aperture defined therein. A plurality of smaller blocks, which have sizes smaller than the regular hexahedral blocks, are each positionable on the apertured side of one of the regular hexahedral blocks when the smaller blocks are oriented in one direction. The smaller blocks can be fitted in the apertured side of one of the regular hexahedral blocks when the smaller blocks are oriented in an opposite direction.

Abstract: A jigsaw puzzle toy has a board (2) with a recess (5) defined in its upper surface. The jigsaw puzzle toy includes a plurality of first projections (19) projecting on the upper surface of the board and having first shapes, respectively, when viewed in plan, a plurality of first blocks (23) having respective holes (31) defined in surfaces thereof and having respective shapes complementary to the first shapes of the first projections (19) for fitting engagement therewith, and respective cavities (29) defined in other surfaces thereof and having respective second shapes, respectively, when viewed in plan; and a plurality of second blocks (37) having respective shapes complementary to the second shapes, respectively, when viewed in plan, for fitting engagement in the cavities (29), respectively, of the first blocks. The second blocks (37) have respective second projections (39) having the first shapes, respectively.

Abstract: An air-cushion vehicle toy [1] includes a first motor [3b] for driving a propeller fan [3a], a second motor [4b] for driving a hovering fan [4a], and a body [1a] detachably mounted on a chassis [1b], on which a power supply [5a] is supported, and covering the upper surface of the chassis [1b] with various components supported thereon. The air-cushion vehicle toy [1] further includes a power cutoff mechanism [5] for breaking a power supply circuit to deenergize the first and second motors when the body [1a] is removed from the chassis [1b].

Abstract: A correct answer displaying device for an arithmetic practicing device or the like. Plural chambers are arranged in matrix form with partition boards, and a colored transparent plate is placed over the chambers on which numerical problems to be solved are indicated and through which the configurations of the correct answer numbers cannot ordinarily be observed. Answer levers are operated to cause white plates to come near the lower surface of the colored transparent plate to display the correct answers. The white plates are pivotally mounted about one side thereof in which an engaging step is formed. Each answer lever, which has an engaging protrusion engaged with a respective engaging step, is accommodated in a guide frame in such a manner that the answer lever can pass in and out of the corresponding chamber.

Abstract: A running toy includes a rotatable drum, a drive shaft rotatable through a reverse mechanism by a driver assembly housed in the rotatable drum and having an end projecting out of the rotatable drum and supporting a drive gear on the projecting end, a support by which the axially opposite ends of the rotatable drum are rotatably supported and substantially covering the axially opposite ends of the drum, a guide gear fixed to the support and held in mesh with the drive gear for guiding the drive gear to revolve around the guide gear to rotate the rotatable drum in response to rotation of the drive gear, a shell assembly openably covering the cylindrical body of the rotatable drum and having one end pivotally attached to the support and an opposite end movable toward and away from the support, and a mechanism for moving the shell assembly in response to rotation of the rotatable drum.

Abstract: A block toy including a hexahedral block body having openings of preselected shapes formed in selected surfaces thereof and a block insert having a color contrasting with the color of the block body and being insertable in the block body such that the contrasting color is visible through the openings in the surfaces of the block body.

Abstract: A reflection type overhead projector employs a Fresnel concave mirror adapted for allowing a transparency to be put on the mirror surface thereof. The beam of light emitted from a light source lamp is reflected by the Fresnel concave mirror, enters a projecting lens and then is projected on a screen. A reflecting mirror is interposed in an optical path between the Fresnel concave mirror and the projecting lens to thereby bend the optical path. The Fresnel concave mirror, the light source lamp and the projecting lens are all mounted to a single case.

Abstract: A school utensil and toy is provided which includes a support member, two leg members rotatably connected to the support member and two foot members rotatably connected to the leg members. At least one of the foot members includes an ink pen which can be retracted into the foot member when not in use. The school utensil and toy also includes members having features that are esthetically pleasing to children such that children will be enticed to play with the utensil and toy. These features may include rotatable arms and a head member. The school utensil and toy can be employed either as a compass, divider, ball point pen or as a toy having two legs such as a robot or a doll.

Abstract: An electric numbering machine which continuously prints a number of large figures by use of a single figure wheel, is compact in size, and reduces the printing operation time. A case of the machine is provided therein with a shaft interposed between a pair of support plates rocked by operation of a solenoid, and rotated by a pulse motor; a figure wheel fitted to the shaft to rotate integrally with same; a ratchet intermittently rotated by operation of the solenoid via a feed mechanism; a brake pawl cooperating with the ratchet to restrict return rotation of the ratchet; a drum cooperating with the ratchet to rotate integrally therewith; and a tensile member having one end fixed to the drum and the other end fixed to a support of the figure wheel.

Abstract: A numeral adding toy including an arrangement for rotationally indexing in a cooperative manner two rotary wheels displaying numerals to be added and a single rotary wheel displaying the added sum answer by means of a rotationally indexing mechanism including pins or ratchets. The wheel displaying the added answer is rotated the summed number of indexes of the two wheels displaying the numerals to be added. The wheels, having been rotationally indexed, are rotationally returned by means of a releasing mechanism.

Abstract: In a permanent magnet motor wherein commutator segments have surfaces arranged in a plane perpendicular to the motor shaft for sliding contact with brushes, each brush is made of sheet metal and comprises an inner portion affixed to an end cap of the motor casing, and a substantially annular outer portion united at one of its ends to the inner portion and having an embossed contact on the other end which is resiliently urged into sliding contact with the commutator segment surfaces. The outer brush portion is notched to engage a protuberance on the end cap. A lubricant reservoir is formed either on the commutator or on each brush. The end cap may be locked in position on the motor casing, and the commutator may be mounted on the motor shaft in a predetermined angular position in relation to that of an armature core.