Abstract: In an electromotively driven garden appliance, for example a lawnmower or a lawn-aerator, the on-off switch is usually arranged on the handle-bar such that it can easily be accessed for operation. This on-off switch is connected via a cable to the motor circuit, the cable being guided along one branch of the handle-bar. According to the invention, in order to avoid damage to the cable and resultant unreliable contact-making when the handle-bar is folded down, the cable is replaced by a wireless connection, in particular by infrared radiation, radio or ultrasound. For this purpose, a transmitter is assigned to the electrical on-off switch and a receiver on the chassis is assigned to the motor circuit.

Abstract: In an accumulator-powered lawn mower, the battery (10) providing power to the electric motor is accommodated in a battery housing which can be inserted into a battery compartment (28) of the lawn mower chassis. For charging purposes, the battery can be removed from the compartment and placed into a charger having a corresponding compartment with electrical contacts. On the upper side, the battery housing has a handle (12) which can pivot about a horizontal spindle (16) and is coupled to a locking mechanism (22) which engages a set of corresponding interlocking recesses (24) when the handle is folded down. Support is provided at the bottom of the compartment, preferably in the form of springs (30).

Abstract: A bow saw provided with a handle on the rear end of its bow-shaped frame can be coupled to a rod (32), for instance a telescopic rod, by a rod-attachment coupling. For this purpose, the rear section of the bow-shaped frame (10) has a detent element (34) which is welded on it which is surrounded by the handle shell (30) of the handle and a device insertion pin (36) which is swingably fastened on the frame (10) by fork arms (38) in the region of the detent element (34). This device insertion pin (36) can be form-locked to the detent element (34) in the outward-swung position of the handle so that the device insertion pin (36) protrudes towards the rear and a rod (32) provided with a corresponding insertion hole and a coupling can be pushed onto it. The movement of the device insertion pin (36) into the coupling position is effected by entrainment upon the swinging of the handle shell (30).

Abstract: A handle (10) is described which can be attached by means of a fastening coupling to gardening tools which have a corresponding complementary coupling. Locking is assured in known manner by means of a leaf spring (14), the protuberance (18) of which engages in a locking hole of an inserted tool insertion pin. In order to loosen the coupling, the leaf spring (14) must be lifted out radially. This is done by means of a rocker arm (36) which acts on the free end (20) of the leaf spring (14) and in turn is actuated by axial displacement of a release button (22) which is displaceably mounted in the end of the handle. The restoring of the release button (22) is effected by the radial springing back of the leaf spring (14) which swings the rocker arm (36) back, which arm in turn exerts an axial force on the release button (22).

Abstract: In a garden appliance provided with a traveling drive, the tools, for example a mowing tool, are driven by a motor which is also coupled to the drive wheels. Connected between the motor and drive wheels is a gear which reduces the speed of the drive wheels with increasing output requirement or increasing torque, and vice versa. As a result, it is, for example, effected that in the case of a high resistance to mowing the advance of the mower is less than in the case of a low resistance to mowing. A V-belt pulley gear with variable radii can be used as the gear, the axial adjustment of the V-belt pulley halves being effected as a function of the load torque. This setting can be performed against the action of return springs via helical threads which can be constructed, for example, in the form of a ball self-closure.

Abstract: The pruning shears have a link pivotally connecting the force-lever arm of the cutter with the tang and a strap bridging the cutter and tang. In this way, the tilting movement, to which the joints are otherwise exposed, is counteracted by the strap.

Abstract: One arm (30) of the pruning shears is connected via a swivel joint to the end of a guide handle. The swivel joint has a hinge pin (32) the axis of which intersects the axis of the handle at a right angle and is on a line with the guide groove of a cable pulley (24) which is mounted between fork arms (20) which protrude laterally from the end of the handle. By means of a traction cable (48), the arms of the shears can be locked in any angular position of the swivel joint. A locking knob (36) presses the interlocking fork arms (26, 28) of the end of the handle or the arm (30) of the shears together, as a result of which they are fixed in position by friction.

Abstract: In garden shears of this type, the anvil and/or the cutter are adjustable with respect to the cutting edge of the blade. For this purpose, the anvil has slots which may be linear or curved and are set at an angle with respect to the cutting edge. These slots serve as guidance for anvil bushings which are slidably disposed in the slots. Together with screws which are threaded into the bushings, a clamping connection is produced between the anvil and the shear arm. In the cutting direction there is provided, in every position, a locked support via the anvil bushings in the guide slots.

Abstract: In garden shears the locking device which holds the shear grips in closed position against the force of an opening spring is developed as a slide grip which lies free both on the top and on the bottom of the one hand grip so that this slide can be actuated by the thumb of both the right hand and the left hand without it being necessary also to use the other hand. The slide grip has spring detents which cooperate with indentations in said one hand grip.

Abstract: A garden shears is provided with replaceable knives mounted on elongated grips which are connected at a pivot joint that is constructed of a steel bushing that takes up radial loads (shear and flexure). Axial loads are taken up by a screw bushing which passes through the steel bushing and a joint screw threadably engaged with the screw bushing. Both the joint screw and the screw bushing have widened shallow heads with slightly convex surfaces that pass into surfaces of the shears. The replaceable knives are supported at the rear by extensions of the respective grips in a manner such that the knives are not required to take up bending moments.

Abstract: A cutting blade (16) of rose-gripping shears cooperates with an anvil (30). A clamping piece (50), which has a clamping plate (52) which rests against the anvil (30) in the closed position, is movable together with the cutting blade (16). The said clamping piece can move backwards under spring action in order to hold a cut stem between the clamping plate (52) and the anvil (30). The spring urging of the clamping piece (50) is obtained by a spring arm (56) which extends in an arcuate section around the swivel pin (22) between the shear arms and comes against a mounting plate (58) which is connected, fixed for rotation, to the gripping lever of the cutting blade (16).

Abstract: In a lawnmower with a grass collection container, the level to which the container is filled is recognizable optically or acoustically. For this purpose, a sensor is arranged in the grass entry mouthpiece of the grass collection container to supply a quantitative or qualitative signal via an electronic evaluation circuit. The collection container is attached to the rear of the frame of the lawnmower.

Abstract: The invention relates to an electric-motor drive system for hand-guided tools, in particular for garden appliances but also for tools used at home such as drills and the like. A power source 12 which is portable or adapted to be fixed to the tool has a chargeable direct-current battery 14, the output of which is connected to a converter 16 which contains an electronic circuit which converts the DC voltage to a three-phase voltage. Via a three-phase line 22 a three-phase motor 18 is supplied and drives the tool 20 directly or via a coupling 28.

Abstract: The swivel joint of the shears comprises a dish-like rotary head 14 which is moulded from plastic and which is inserted with an inner bush 46 into a swivel joint bush 44 of an extension provided with the fixed upper grip 10. The axial fixing is via a detent means 54, 56.On the rotary head 40 the lower blade 50 is fixedly disposed and the upper blade 68 is pivotal on a bearing bush 58 of the rotary head. A pull rod 78 led through the bush 46 is anchored with a bent end to the movable upper blade laterally of the pivot axis thereof. The other end is anchored in an adjustment bush 82 which is adjustably fixed in an adjustment pin 84. The locking is by a plastic slide 24 which is disposed at the front end of the upper grip and can easily be displaced with the thumb to lock or unlock the lower grip or movable blade.

Abstract: In pruning shears a rope-and-pulley device is incorporated between the shears legs in such a manner that by pulling the free end of the rope an amplified closing force is obtained. For convenient remote operation one shears leg force lever arm is connected fixedly or detachably to a handle of any desired length, by a handle securing coupling which extends parallel to the shears leg. An opening spring biases the shears in the opening direction.

Abstract: In a cutting head for an electric-motor-driven filament-type cutter the automatic adjustment of the length of the filament is effected in that intermittently a rotational movement occurs between a filament spool (36) and a sleeve (24) mounting said spool for axial displacement. The sleeve (24) is provided on the outside with locking cams and the filament spool on the inside with cams cooperating therewith. The sleeve (24) can be pushed in by hand against spring pressure to cancel the intermittent locking. For automatic filament adjustment a centrifugal adjustment is provided. For this purpose at least two radial ball slots (40) are provided between the housing portion (14) and a radial extension (48) of the sleeve (24) and in the ball slots balls (44) are guided which are adapted to be urged outwardly by centrifugal force.

Abstract: In a manual sowing apparatus a cell wheel 132 is provided which is drivable by a wheel disk 116 directly or via a reduction gear and which conveys the grain seeds from a receiving chamber via pockets disposed in the wheel to a discharge station. A plurality of cell wheels are associated with each apparatus and can be fixed via a bayonet coupling on a support drum 72. Cell wheels which are not in use can be accommodated in a receiver 104. A resilient scraper is disposed at the discharge end of the receiving chamber and prevents jamming of the cell wheel by scraping off grains when they are too large or when there are too many in a pocket, while grains projecting a slight extent can pass beneath the scraper.