The lawn mower trimming attachment is configured for use with a lawn mower. The lawn mower trimming attachment is configured for use with a string trimmer. The lawn mower trimming attachment attaches the string trimmer to the lawn mower such that the string trimmer can be operated from the lawn mower. The lawn mower trimming attachment is a rotating structure such that the string trimmer can be rotated into position. The lawn mower trimming attachment has an adjustable elevation such that the angle of attack of the working element of the string trimmer can be adjusted. The lawn mower trimming attachment comprises the string trimmer, the lawn mower, an extension apparatus, and a pedestal. The pedestal attaches the extension apparatus to the lawn mower. The extension apparatus attaches the string trimmer to the pedestal.

A network of modular, multitier pool mobile units, that wander around and under water of a swimming pool. The pool mobile units monitor for safety, emergency and accident related events and undertakes appropriate actions, scrub and clean the swimming pool, emit chemical agents to sanitize the swimming pool water, and may play music. The pool mobile units may simply operate on the pool surface, be fully submersible, or semisubmersible. A central server manages a plurality of multitier pool mobile units in a plurality of swimming pools, supports music download, and provides experience based resources for the multitier pool mobile units. The central server provides experience based resources in the form of safety, emergency and accident supports. The user can configure the parameters of both pool mobile unit and the central server.

A network of modular, multitier pool mobile units, that wander around and under water of a swimming pool. The pool mobile units monitor for safety, emergency and accident related events and undertakes appropriate actions, scrub and clean the swimming pool, emit chemical agents to sanitize the swimming pool water, and may play music. The pool mobile units may simply operate on the pool surface, be fully submersible, or semisubmersible. A central server manages a plurality of multitier pool mobile units in a plurality of swimming pools, supports music download, and provides experience based resources for the multitier pool mobile units. The central server provides experience based resources in the form of safety, emergency and accident supports. The user can configure the parameters of both pool mobile unit and the central server.

A network of modular, multitier pool mobile units, that wander around and under water of a swimming pool. The pool mobile units monitor for safety, emergency and accident related events and undertake appropriate actions to provide care and protection for swimmers, family members and bystanders. They scrub and clean the swimming pool bottom and wall surfaces and emit chemical agents to sanitize the swimming pool water. A central server provides safety monitoring, help for drowning swimmers, and emergency and accident supports.

A network of modular, multitier pool mobile units, that wander around and under water of a swimming pool. The pool mobile units monitor for safety, emergency and accident related events and undertake appropriate actions to provide care and protection for swimmers, family members and bystanders. They scrub and clean the swimming pool bottom and wall surfaces and emit chemical agents to sanitize the swimming pool water. A central server provides safety monitoring, help for drowning swimmers, and emergency and accident supports.

A lawn mower to weed trimmer attachment apparatus for simultaneously weed trimming and lawn mowing includes a pair of attachment arms each comprising an upper arm and a lower arm. The upper arm has a threaded adjustment aperture to receive an adjustment bolt to selectively engage the lower arm and fix the height of the attachment arm. A trimmer cradle is coupled to the upper arm and is configured to receive a trimmer arm of a weed trimmer. A mower tube is coupled to the lower arm. The mower tube has an attachment aperture and is configured to receive an attachment hardware set. The mower tube is configured to receive the mower arm of a lawn mower. A pair of cross braces extends between the pair of attachment arms and a support brace is coupled to the mower arm.

A lawn mower to weed trimmer attachment apparatus for simultaneously weed trimming and lawn mowing includes a pair of attachment arms each comprising an upper arm and a lower arm. The upper arm has a threaded adjustment aperture to receive an adjustment bolt to selectively engage the lower arm and fix the height of the attachment arm. A trimmer cradle is coupled to the upper arm and is configured to receive a trimmer arm of a weed trimmer. A mower tube is coupled to the lower arm. The mower tube has an attachment aperture and is configured to receive an attachment hardware set. The mower tube is configured to receive the mower arm of a lawn mower. A pair of cross braces extends between the pair of attachment arms and a support brace is coupled to the mower arm.

A mower having a supplemental battery charging station mounted thereon is provided. The mower utilizes a flywheel/alternator arrangement to output a selected voltage. The voltage is directed to the supplement battery charging station. The supplemental batteries are thereby charged at the charging station as the mower is driven forward or in another direction. The lawn mower also includes a rack (which may be in the form of a hook) to carry a battery powered supplemental lawn maintenance tool, such as a weed trimmer, hedger, edger, or leaf blower, amongst others.

A mower having a supplemental battery charging station mounted thereon is provided. The mower utilizes a flywheel/alternator arrangement to output a selected voltage. The voltage is directed to the supplement battery charging station. The supplemental batteries are thereby charged at the charging station as the mower is driven forward or in another direction. The lawn mower also includes a rack (which may be in the form of a hook) to carry a battery powered supplemental lawn maintenance tool, such as a weed trimmer, hedger, edger, or leaf blower, amongst others.

One apparatus includes a processor and a radio transceiver that receives a set of reference signals transmitted from transmission point. The processor selects a subset of beams from a plurality of orthogonal beams based on the received set of reference signals and computes sets of amplitude and phase parameters for one or more channel compression matrices. In some embodiments, each channel compression matrix corresponds to one transmission layer of a multiple-layer transmission and each channel compression matrix is comprised of one or more column vectors. The processor controls the radio transceiver to send indications of the sets of amplitude and phase parameters.