Abstract: An electric power tool of the type which has an inserted tool bit (8), which can be operated with a rotary and a hammer action, and comprises a hammer which can be activated by axial displacement of the tool bit (8) by engagement with the work piece, also comprises a manually operable adjustment handle which can be rotated about an adjustment axis (59) between a first position in which a stop element (53) permits the axial displacement for the activation of the hammer means, and a second position in which the stop element (53) blocks the axial displacement. The stop element (53) is connected with cam surface (61, 62) which is coupled with an adjustment element (41) movement of which switches between high and low speeds of the tool. The cam surface has an arc-shaped portion (61) circular about the adjustment axis (59). Connected to one end of the arc-shaped portion(61) of the cam surface is a curved second portion (62), the distance of which from the adjustment axis (59) changes continuously.

Abstract: A vacuum cleaner has a power brush which projects dirt particles directly into a specially formed and located vacuum nozzle in such a manner that low air consumption can be used. The vacuum nozzle has an inlet extending along the full axial length of the power brush. Inclined grooming brushes may be provided to eliminate wheel tracks. The front wall forwardly of the power brush may be modified to provide front edge cleaning. A cordless upright vacuum cleaner may advantageously be provided having a cleaning performance comparable with that of mains powered upright cleaners.

Abstract: A doctor blade head assembly, particularly for use in a flexographic printing press, has a head body pivoted to a support frame with an inflatable air tube disposed therebetween. The air tube extends along a channel having a bottom formed with spaced apart raised portions which cause the air tube to bulge out at these locations. In this way the air tube essentially only presses against the head body at these spaced apart locations, for example at the center and adjacent the ends, which reduces the tendency of the head body to bend along its length. This provides a more uniform ink film on the ink roll being inked by the doctor blade head assembly. End seal arrangements at the ends of the head body each include a resilient block seal and a resilient pad seal with which greased edge portions of the doctor blades slidably engage. The doctor blades overhang the ends of the ink roll, and an ink outlet passageway extends through each end seal arrangement independently of the seals.

Abstract: A multi-function hand-held power tool includes an electric motor for driving a tool holder and control means for energizing the motor in accordance with a selected combination of operating conditions under which the tool is to be used. Located on the housing of the tool is a keyboard for inputting to the control means information to define the selected combinations of conditions. The keyboard has a first single key for selecting a tool function, for example drilling, from a defined range of tool functions, a second single key from selecting a required workpiece material for example wood, from a defined range of workpiece materials, and two further keys for selecting, from a defined range, another parameter, for example drill size, appropriate to the selected tool function. A visual display also located on the tool housing is energizable to show symbols indicative of the selected combination of operating conditions.

Abstract: A hand-held power tool with a rotary driven tool, in particular a planer or a circular saw, is arranged so that on switching off the drive, which can be switched on and off by means of a trigger (15), a brake element (34), which is ineffective when the drive is switched on, is brought into braking engagement with a brake part (51) rotatingly driven by the drive. The tool comprises a safety element (21) which co-operates with the trigger (15) and which can be displaced between a safety position in which the trigger (15) cannot be moved to switch on the drive, and a release position in which the trigger (15) can be moved into the position to switch on the drive. The safety element (21) is urged by spring pressure towards the safety position and is held in the release position when the trigger (15)L is in the switch-on position.

Abstract: A machine having multiple stationary weighing and filling platforms serviced by parallel straight line infeed and discharge container or material conveyors. Positive grippers transfer the containers or other material to be weighed transversely to stationary weighing and filling platform and the same or similar grippers transfer the containers from the platform to a parallel discharge track. This eliminates centrifugal forces, increased throughput reduces floor space and permits greater sensitivity in weighing since there is no inherent motion of vibration at the weighing station.

Abstract: A device for sucking up material removed by the bit of a portable drill is made in the form of a casing provided with means for securing it to the drill and having at least one portion constituting a handle to enable it to be gripped in one hand by the operator. The device comprises a suction head fitted slidingly on the casing to enable it to be kept close to the point of penetration into the surface of a body to be drilled by the bit fitted on the drill. Disposed inside the casing of the device are a fan with intake connected to said head through a connecting duct and with outlet blowing into a container, supported by the casing, for collecting the aspirated material, an electric motor to actuate the fan, electric batteries to supply power to the motor through an operating switch. The casing of the drill alternatively comprises an electric socket designed to receive a corresponding plug mounted on the vacuum device so as to supply power to the fan motor by taking it from the power supply of the drill.

Abstract: A radio controlled toy airplane has an airframe with a fixed vertical tail plane, a fixed horizontal tail plane, and at least one set of rightside and leftside propellers. The rotational outputs of the propellers are controlled discretely and continuously or in a staged manner, respectively, via a remotely located radio transmitter. This transmitter has two manual control sticks, one for controlling total combined power to the propellers and the other for adjusting the power distribution between the propellers, and in this way flight of the toy airplane is solely controlled by controlling motors which separately drive the propellers. The motors may be battery powered.

Abstract: There is provided with a method of mounting a circuit on a substrate which utilizes advantages of the COG method, can enhance the yield and can reduce the cost, and a circuit substrate for use in the method.A circuit pattern, including a pectinate connecting electrode having the same pitch interval as that of a pectinate marginal electrode on an electrode pattern formed on a substrate, is formed on a stick circuit substrate having the same coefficient of thermal expansion as that of the substrate and extending in the lateral or longitudinal direction of the margin of the substrate.After the necessary number of circuits are directly mounted on the circuit substrate, the pectinate marginal electrode of the substrate and the corresponding pectinate electrode of the circuit substrate are electrically connected.

Abstract: A vacuum cleaner has a power brush which projects dirt particles directly into a specially formed and located vacuum nozzle in such a manner that low air consumption can be used. The vacuum nozzle has an inlet extending along the full axial length of the power brush. Inclined grooming brushes may be provided to eliminate wheel tracks. The front wall forwardly of the power brush may be modified to provide front edge cleaning. A cordless upright vacuum cleaner may advantageously be provided having a cleaning performance comparable with that of mains powered upright cleaners.

Abstract: A control circuit for alternating current motors comprises a bidrectional controlled diode (TRIAC) connected in series to the motor and with its own control terminal connected to a fixed-phase actuating network in order to supply partial power to the motor. The control terminal is also connected to a switching device, piloted by a control signal to supply it, when closed, with a bias current which causes the continuous operation of the TRIAC, so as to supply full power to the motor. The control circuit can be used in conjunction with circuits which measure the current absorbed by the motor and give said control signal to make it switch from the full power condition to the partial power condition and vice versa whenever said current reaches pre-established thresholds. One of these circuits supplies partial power to the motor whenever the current it absorbs is too high, which indicates a mechanical overload.

Abstract: A lead edge sheet feeder, particularly for corrugated paperboard sheets, has an endless belt transfer section downstream of a control gate. This endless belt is driven at constant speed and at least first and second vacuum boxes are disposed successively along the transfer belt. Both vacuum boxes are continuously connected to a vacuum source. Each vacuum box has an open face which has to be completely covered by the sheet being fed before that vacuum box is effective in drawing the sheet against the transfer belt. There may be a third vacuum box, and vent holes may be provided in a common partition between the third and second vacuum boxes. The feed section, upstream of the control gate, may have modes for long and short sheets, in the shorter sheet mode less length of sheet being contacted by a feed conveyor.

Abstract: A hand-held high-pressure cleaner has a pump, which is driven by a universal motor. The universal motor is positioned together with the fan attached to its armature shaft in an air-tight and water-tight sealed motor chamber of the tool-casing of the high-pressure cleaner. In this motor chamber a radiator or cooler, through which cleaning fluid flows, is provided for cooling the air circulated by the fan.

Abstract: A system for recovering hot-melt materials for reuse in a glue gun includes a flexible mold form mounted in a carrier and having an internal cavity that approximates the dimensions of the preformed hot-melt sticks. In order to change from one type hot-melt material to another, the sticks of the desired material are loaded into the gun while the heated, hot-melt material in the gun is discharged into the mold form. The hot-melt material flows into the mold form and assumes the shape of a conventional preformed stick. After cooling and solidification of the material, the mold form is removed from its carrier and the cooled, cast stick is removed from the mold form for reuse. The mold form is fabricated from a flexible, heat-resistant material, such as a silicone rubber, and includes an elongated tubular portion having a tapered exterior to facilitate removal from its carrier and an internal bore dimensioned to produce a cast stick having the dimensions of the preformed stick.

Abstract: A device for cutting vegetation has a housing rotatable about an axis, a rotatable spool within the housing storing a supply of flexible line having an end extending through an aperture in the housing into a cutting plane normal to the axis, and an arrangement for automatically letting out additional line by causing relative rotation between the spool and housing whenever the length of line extending into the cutting plane is less than a predetermined length. The automatic arrangement includes a series of angularly-spaced locking faces provided on the spool (or on a member connected thereto) or on the housing, and a balance bar pivotally mounted on the housing or on the spool with this balance bar having a member for engagement with the locking faces. The center of gravity of the balance bar is on the side of the pivot point opposite from the engagement member. In use, the balance of forces on the engagement member directs this member against the locking faces.

Abstract: A hot-air furnace has a long-flame burner for combusting gas or liquid fuel with a combustion chamber connected to the burner and having its length (l) and width (w.sub.1) in relationship of w.sub.1 <l. A heat exchanger is located above the combustion chamber and has internally a gas flow guide plate which guides combustion gas flow discharged from the combustion chamber to the heat exchanger. The heat exchanger has a width (w.sub.2) and length (l) in the relationship of w.sub.2 <l. An exhaust port for exhausting the combustion gas flow is located at the front or rear of, right or left-hand side of or on the top side above said heat exchanger. A casing has a drum integrally connecting the combustion chamber and the heat exchanger, an air flow guide and directing plate which covers the drum, a radiant heat absorber plate outside the combustion chamber, and a blower above or below the drum.

Abstract: A power drill has a mode changing mechanism enabling the drill to be operated selectively in a hammer mode and a non-hammer mode. Pivotally mounted upon an internal partition of the drill is a mode changing mechanism comprising a first rigid limb and a second limb consisting of a leaf spring located in side-by-side relationship with the first limb. The mechanism is pivotable into a first position in which the rigid limb is directly behind the output shaft of the drill so preventing rearward movement of the shaft and enabling the drill to operate in a non-hammer mode, and a second position in which the leaf spring is directly behind the output shaft so allowing rearward movement of the shaft and enabling the drill to operate in a hammer mode.

Abstract: A method of winding a motor armature includes providing a sub-assembly comprising a shaft having an armature core and a commutator mounted thereon, the commutator having commutator bars spaced apart about the shaft with each bar having leading and trailing wire connection devices angularly spaced apart with respect to said shaft. A first wire is connected to a leading wire connection device and a second wire is connected to a leading connection device on the other side of the commutator. The successive coils are separately wound on the armature core from the first and second wires with connection of each wire to a different leading connection device between successive coils. Thereafter further successive coils are separately wound on the core from the wires but now with connection of the wires between successive coils to trailing connection devices until the commutator bars have pairs of electrically parallel coils connected thereto.