Abstract: An automatic machine for the production of rounded bevels at the corners of flat sheets, comprising a device (20) for the support and transfer of a sheet (3), hinged to fixed frame (10) of the machine and capable of rotating in relation thereto around an axial parallel to the feed direction, means (40) for stopping the feeding of such sheet, a means (30) holding sheet (3), hinged to fixed frame (10) and capable of rotating in relation thereto around an axis of rotation (32a) perpendicular to the plane of sheet (3), a work tool (50) integral with fixed frame (10) in relation to which it may be made to rotate via appropriate means (52, 52a), and means (60 ) for unloading sheet (3) on completion of the work, the axis of rotation of such means (30) for holding sheet (3) being capable of being moved in programmable settings with respect to a reference line parallel to lower edge (3a) of sheet ( 3) and the stopping surface of such means (40) for stoppage of movement being capable of being moved in programmable sett

Abstract: An apparatus for the automatic separation along predetermined bending fracture lines in basic ceramic platelets of hybrid electronic circuits includes a support plate provided with grooves on its lower face defining bending lines juxtaposed with the fracture lines of the platelet urged against an upper face of plate by upper pressing members being in contact with each of single elements of the platelet defined by the fracture lines and lower retractable members controlled in a predetermined sequence for successive bending of the plate and the platelet subdivided in a plurality of single elements.

Abstract: The compact high-ratio speed reducer without play consists of an external housing in which a first shaft is rotatingly arranged, carrying a planetary element on which a first gear is loosely supported, this gear having two toothings, one of which is in engagement with a crown wheel integral with the external housing and coaxial with the first shaft, and the second is in engagement with a further gear, integral with a second shaft supported within the external housing and coaxial with the first shaft. The gear toothings are urged together to eliminate possible play between the toothings in mutual engagement.

Abstract: The fixture for supporting workpiece of any shape in automatic machining lines according to the invention has a multiplicity of parallel pins with vertical axes, arranged according to a regular pattern in parallel rows, slidably lodged in correpsonding holes made in a pair of spaced apart parallel support plates, protruding in their rest position from the upper side of the plate by a value equal or bigger than the maximum depth of the planned impression, having frictional elements for locking in the axial position assumed by the pins as a result of the action of the impression-forming unit. A device for resetting the rest positions of the pins is also provided for the cancellation of the impression.

Abstract: A backspace device in a typewriter comprising: an interposer operable by the operation of a key lever; a cycle bail operable by the interposer; a cycle clutch for intermittently transmitting a driving force from a driving source to a main shaft so that the main shaft can be rotated by a predetermined number of times in association with the cycle bail; an actuating bail for performing a cycle of a motion along a moving path of a predetermined mode by a full turn of the main shaft, while rendering to the interposer a motion in a direction of the interposer leaving the cycle bail during the motion; a backspace link for moving in association with the interposer during the leaving motion of the interposer; a backspace rack extending laterally of the typewriter, supported rotatably about an axis laterally disposed and turned to a working position by the backspace link; and a backspace pawl fastened onto a carriage so that it can be reciprocated a predetermined distance in the lateral direction by a cam rotatable in

Abstract: A feed roller device of a typewriter used for reliably urging a sheet of paper to be printed against a platen. In this feed roller device, a pair of feed roller assemblies are parallelly arranged in parallel to the axial line of the platen and rocking levers are provided at the central positions in the axial lines of the feed roller assemblies, respectively. Each of these two rocking levers is rockingly supported by a typewriter frame, pivotally supported at one end thereof by a connecting rod of one of the feed roller assemblies and provided at the other end thereof with a spring, which urges the feed roller assembly against the platen by the urging force thereof. Consequently, only two springs are used, so that the adjustment of the feed roller assemblies urging the platen in urging force can be facilitated.

Abstract: A carriage return device in a typewriter including: an interposer operable through operation of a key lever for the carriage return; a cycle bail driven by the interposer; a driving source adapted to rotate a main shaft by a predetermined number of rotations in association with the cycle bail; a cycle clutch for intermittently transmitting a driving force to the main shaft; an actuating bail for performing a cycle of movement having a locus of a predetermined mode to cause the interposer to disengage from the cycle bail; a carriage return bell crank for operating in association with the interposer when the interposer moves in the direction of disengaging from the cycle bail; a carriage return clutch operable by the carriage return bell crank; a carriage driving device for driving the carriage to return through operation of the carriage return clutch; and a mechanism for operating to return the carriage return bell crank upon completion of carriage return; wherein the carriage return device further includes a

Abstract: This invention is a platen knob device in a typewriter for releasing a platen of the typewriter from a platen pitch feed mechanism and changing the platen over to a continuous feed. This platen knob device includes a platen variable fixed onto a platen shaft and a platen driver operative in association with the platen pitch feed mechanism and slidably provided on the platen shaft. The platen driver is urged by the platen variable through a spring, whereby the platen driver and the platen variable are engaged with each other, in which condition, if the platen knob is rotated, then the platen is changed over to the pitch feed. If the platen knob is urged in a direction opposite to the direction in which the platen knob is urged by the spring, then the platen driver is urged against an end face of a cylindrical portion of the platen knob to move in the axial direction thereof and separated from the platen variable to change the platen over to the continuous feed.

Abstract: A printing device in a typewriter including a rocker bracket turned in a direction of printing by a cam rotated when a key is pressed, a type head vertically movable and rotatably supported by the rocker bracket, a vertically movable pulley and rotatable pulley which are mounted on the bracket which are connected to a letter selecting mechanism and rotated by a predetermined value in accordance with a letter selected by the key, a printing arm for pivotally supporting a trigger detachably engageable with the rocker bracket and abutting against and being rotated by the cam to turn the rocker bracket, vertical direction selecting means for moving to a predetermined position in accordance with a value of rotation of the vertically movable pulley, rotational direction selecting means provided on the rotatable pulley and a printing pressure control member for being movable in accordance with the movements of the vertical directional selecting means and the rotational direction selecting means and having at least t

Abstract: The present invention relates to a tab setting device for stopping a carriage of a typewriter at a desired position. This tab setting device includes an unusual-shape hole formed in a frame of the typewriter in which a tab bracket can rock. In this unusual-shape hole, two pairs of projections for supporting the tab bracket are formed on the bottom surface, one pair of the projections serve as fulcrums for rocking of the tab bracket when a tab pin or pins are tab-set, while the other pair of the projections serve as fulcrums for rocking of the tab bracket when a tab pin or pins are cleared.

Abstract: A device for controlling a type-carrying element in a single unit for typewriters or like machines comprises a stepped cam to execute the hammering action of the type-carrying element with an intensity independent from external factors and manually adjustable for all the characters of the type carrying element, and also, in addition, automatically for some characters of the type-carrying element, particularly for those having a smaller printing area, the stepped cam being provided to effect the hammering action by inertia following the action of a spring suitable to transmit a given initial thrust.

Abstract: A device for controlling the positioning of a single element type-carrier for typewriters or the like comprises a plurality of kinematic chains, each comprising a transverse rod connected with sliding elements fitted with cam windows suitable to control, by means of corresponding cams, the pulleys carrying the control wire of the type-carrying element, each kinematic chain being actuated directly by an interposer associated with a related key lever.

Abstract: A ribbon-feed and motion-reversal device for typewriters and the like comprises an oscillating supporting plate on which a cartridge with the spools carrying the inked ribbon is placed, the supporting plate being coupled to a driving lever driven by a cam mounted on the driving shaft of the typewriter, and suitable to transmit the winding action directly to either one of the ribbon-carrying spools of the cartridge. A balance lever is driven by the ribbon at the end of its unwinding, through oscillating wings on the cartridge.