Abstract: A debris disposal chute includes a plurality of tubes having rectangular cross sections of a decreasing size attached together. Flaccid members are connected between hangers pivotably mounted to a casing and the first tube and between the flaccid members of the upper tube and the next lower tube. The casing is pivotably mounted to a receptacle about an axis perpendicular to the hanger axis and the center line of the chute. A header is removably connected to the receptacle by attachment bars and includes a surface inclined towards the open entry. Weight basins are removably connected to the header by leverage connectors on opposite sides of the open entry and the attachment bars.

Abstract: A dual post receptor (30) of a safety rail system (10) has horizontal cross sections of an elongated shape with a width generally equal to and for slideable receipt of vertical posts (18) of conventional railings (12) and a length larger than double the diameters of the vertical posts (18). Elongated horizontal slots (38) are located in sides (34a, 34b) of the receptor (30) for receiving locking pins (22) also inserted through holes (20) in the vertical posts (18). Mounting the receptor (30) can be accomplished in a variety of manners including secured to a planar, horizontal mounting plate (46) secured to the bottom edges of the enclosure, secured to a vertical mounting plate (50) having a horizontal securement plate (56), secured to a protrusion (64) for slideable receipt in sockets such as in a truck bed, secured to a C-shaped clamp system of a variety of constructions, or the like.

Abstract: A dual post receptor (30) of a safety rail system (10) has horizontal cross sections of an elongated shape with a width generally equal to and for slideable receipt of vertical posts (18) of conventional railings (12) and a length larger than double the diameters of the vertical posts (18). Elongated horizontal slots (38) are located in sides (34a, 34b) of the receptor (30) for receiving locking pins (22) also inserted through holes (20) in the vertical posts (18). Mounting the receptor (30) can be accomplished in a variety of manners including secured to a planar, horizontal mounting plate (46) secured to the bottom edges of the enclosure, secured to a vertical mounting plate (50) having a horizontal securement plate (56), secured to a protrusion (64) for slideable receipt in sockets such as in a truck bed, secured to a C-shaped clamp system of a variety of constructions, or the like.

Abstract: A gate system (10) includes two spaced sides (12, 14) defining a work area (16) between the sides (12, 14). A first opening (18) is defined between first ends of the sides (12, 14), and a second opening (38) opposite to the first opening (18) is defined between second ends of the sides (12, 14). Two gates (82, 92) for opening/closing the first and second openings (18, 38) are respectively coupled with two shafts (40, 50) rotatably supported by one of the sides (12, 14). The shafts (40, 50) are rotatably interconnected wherein pivoting of one of the gates (82, 92) in a direction causes pivoting of the other gate (82, 92) in an opposite direction. Each gate (82, 92) includes a groove (85, 95) that receives a vertical beam (60, 62) of the other side (14) when the gate (82, 92) is in a closed position. Biasing elements in the form of gas cylinders (110, 120) between the side (12) and the gates (82, 92) prevent the gates (82, 92) from slamming into their closed positions.

Abstract: A gate (106) includes a panel (112) movable relative to a fixed member (110) between an open position and a closed position. A linkage (140) is pivotally mounted to the panel (112) about a latch pivot axis. A catch (130) is pivotally mounted to the linkage (140) about a catch pivot axis spaced from and parallel to the latch pivot axis. The catch (130) is movable between a latched position engaged with the fixed member (110) and an unlatched position disengaged from the fixed member (110). The catch (130) defines a groove for slideable receipt on the fixed member (110). When the catch (130) is in the latched position and the panel (112) is in the closed position, the catch (130) abuts against opposite sides of the fixed member (110) along an extended length such that forces are applied on each side at spaced locations to resist twisting forces.

Abstract: A gate (106) includes a panel (112) movable relative to a fixed member (110) between an open position and a closed position. A linkage (140) is pivotally mounted to the panel (112) about a latch pivot axis. A catch (130) is pivotally mounted to the linkage (140) about a catch pivot axis spaced from and parallel to the latch pivot axis. The catch (130) is movable between a latched position engaged with the fixed member (110) and an unlatched position disengaged from the fixed member (110). The catch (130) defines a groove for slideable receipt on the fixed member (110). When the catch (130) is in the latched position and the panel (112) is in the closed position, the catch (130) abuts against opposite sides of the fixed member (110) along an extended length such that forces are applied on each side at spaced locations to resist twisting forces.

Abstract: Cantilever gates (10) in the form of parallelograms include first and second bars (40) and a toe board (140) extending between and pivotally mounted to first and second posts (20, 30) and moveable between closed and open positions. Gas struts (46) assist in moving the gate (10). A lock (60) in the form of a pivotal latch (62) holds the gate (10) in its open position. A slide receptor (80) slideably receives the second post (30) as the gate (10) moves from the open to the closed position and can be removably secured to the support surface mounting plate (82). A pair of cantilever gates (10) can have their respective second posts (30) slideably related.

Abstract: Cantilever gates (10) in the form of parallelograms include first and second bars (40) and a toe board (140) extending between and pivotally mounted to first and second posts (20, 30) and moveable between closed and open positions. Gas struts (46) assist in moving the gate (10). A lock (60) in the form of a pivotal latch (62) holds the gate (10) in its open position. A slide receptor (80) slideably receives the second post (30) in vertical horizontal directions as the gate (10) moves from the open to the closed position and can be removably secured to the support surface mounting plate (82). A pair of cantilever gates (10) can have their respective second posts (30) slideable related.

Abstract: A gate (106) includes a panel (112) movable relative to a fixed member (110) between an open position and a closed position. A linkage (140) is pivotally mounted to the panel (112) about a latch pivot axis. A catch (130) is pivotally mounted to the linkage (140) about a catch pivot axis spaced from and parallel to the latch pivot axis. The catch (130) is movable between a latched position engaged with the fixed member (110) and an unlatched position disengaged from the fixed member (110). The catch (130) defines a groove for slideable receipt on the fixed member (110). When the catch (130) is in the latched position and the panel (112) is in the closed position, the catch (130) abuts against opposite sides of the fixed member (110) along an extended length such that forces are applied on each side at spaced locations to resist twisting forces.

Abstract: A cart (10) facilitates collection, storage and distribution of folding warning lines (200). The cart (10) includes a framework (12) with a rolling support (100) to allow mobility and a stabilizer (120) to engage a work surface. The framework (12) has a handlebar (110), which enables the framework (12) to be tilted rotationally about the rolling support (100) and pushed. The framework (12) has a storage area (18) located between first and second sides (14, 16) and for receiving rigid members (201) of the folding warning lines (200). A plurality of notches (70) defined in a top member (32) and a plurality of slots (72) defined in a bottom member (48) of the framework (12) are adapted to receive and constrain the rigid members (201) in the storage area (18). The framework (12) has a holder (78) adapted to hold a flaccid member (202) of the folding warning lines (200).

Abstract: A saw (10) facilitates cutting of roofing and includes a frame (12) that is mobile on a work surface. A locking mechanism (40) locks the frame (12) into a transport position. Actuating a release lever (60) allows the frame (12) to be adjusted into a working position. A shaft (14) rotatably mounted by first, second and third bearings (74, 75, 76) has saw blades (16, 18) and a pulley (77) for connection with a drive belt (80). The drive belt (80) passes through a hole (79) in the frame (12) to connect to a drive (81) to rotate the shaft (14) and the saw blades (16, 18). The third bearing (76) is mounted to a bearing support (85). The frame (12) has a gap (84) communicating the hole (79) with an exterior edge (78) of the frame (12) proximate the third bearing (76), with the bearing support (85) removably and replaceably mounted to the frame (12) and spanning the gap (84).

Abstract: Roofing kettle apparatus for heating asphalt includes a wheeled chassis mounting a vat and a heating system for heating the vat. The heating system includes a solenoid operated valve for controlling the flow of fuel gas from a fuel gas source to each of a pair of burner nozzles and a igniter assembly having an outlet adjacent the outlet of a first combustion chamber. An igniter generates a spark to ignite gas discharging from the igniter assembly outlet. A flame sensor adjacent to the first combustion chamber outlet end senses the burning of fuel gas. The igniter assembly has a second outlet adjacent the second combustion chamber outlet end. The ignition of fuel gas discharging from the igniter assembly ignites the gas discharging through the combustion chamber outlets. The burners extend into the combustion chambers.

Abstract: A fastener puller for pulling screws (38) and the like from a deck (39) or other workpiece that includes a base (10) having a planar base portion (11B, 11C) joined to an inclined base portion (14) to provide a fulcrum about which the base pivots to move the planar base portion parallel to the adjacent part of the deck as the claw (30), while extending between the insulation hold down plate (35) and the insulation (37) on the deck, is initially moved perpendicularly to the planar base portion by a piston cylinder combination (20, 21). The screw, in being removed, is moved perpendicularly to the part of the deck in which it is extended. The combination reciprocates a slider (24) along the slide mount (17B). The claw is mounted to the slider while the slide mount is mounted to the base to extend perpendicular to the planar base portion whereby the claw is moved to minimize the enlargement of the hole in the deck as the screw is separated from the deck.

Abstract: Apparatus is described for an improved roofing kettle. The improvements comprise electronic temperature control apparatus for the kettle vat. Automatic shutoff apparatus is provided for shutting off the fuel supply in the event the fuel supply is not properly ignited. Apparatus is provided to shut off the flow of fuel to the kettle in the event the kettle temperature reaches a dangerous level.

Abstract: Apparatus and method are disclosed to provide an electronic perimeter warning system to prevent the ingress or egress of persons or machines from a selected area such as in an area along the perimeter of a roof under construction. Battery powered signal transmitters and receivers establish a signal beam between two locations. When the continuity of the signal beam is broken, an alarm is sounded to warn the person who is crossing the signal beam of imminent danger.

Abstract: Apparatus and method are described for picking up and removing gravel. The apparatus and method are particularly adapted to the removal of gravel from the surface of a roof when an old roof is being removed or repaired.

Abstract: A winch control system for a crane or the like; the winch including a rotatable spool. A motor is connected for rotating the spool while a dual state brake is connected to prevent spool rotation in one state while permitting spool rotation in its other state. A power source provides energy to drive the motor and to change the state of the brake. Control elements selectively interconnect the power supply with the brake and motor, the interconnection of the power supply and motor being responsive to the interconnection of the brake and power supply.