Abstract: Apparatus for connecting the ends of a pair of oval duct sections includes a pair of arcuate frame sections and a pair of linear intermediate frame sections that are connected to each other by connector pieces having leg portions extending into receivers in the profile of the frame sections. The connector pieces have stop members which abut the edges of the frame sections and provide a gap therebetween. The lower stop member is offset rearwardly from the body portion of the connector piece and the edge portion of the oval duct extends outwardly into the gap portion. The oval duct end portions are connected to the duct connector frame members and pairs of frame members are positioned in adjacent relation with a gasket member therebetween. The connecting members include a securing device to secure the adjacent frame members to each other and exert a compressive force on the gasket member therebetween.

Abstract: Apparatus for connecting the ends of a pair of oval duct sections includes a pair of arcuate frame sections and a pair of linear intermediate frame sections or a pair of frame sections with a linear portion and a pair of semi-circular end portions. The sections are connected to each other by connector pieces having leg portions extending into receivers in the profile of the frame sections. The connector pieces have stop members which abut the edges of the frame sections and provide a gap therebetween. The lower stop member is offset rearwardly from the body portion of the connector piece and the edge portion of the oval duct extends outwardly into the gap portion. The oval duct end portions are connected to the duct connector frame members and pairs of frame members are positioned in adjacent relation with a gasket member therebetween. The connecting members include a securing device to secure the adjacent frame members to each other and exert a compressive force on the gasket member therebetween.

Abstract: Apparatus for connecting the ends of a pair of oval duct sections includes a pair of arcuate frame sections and a pair of linear intermediate frame sections or a pair of frame sections with a linear portion and a pair of semi-circular end portions. The sections are connected to each other by connector pieces having leg portions extending into receivers in the profile of the frame sections. The connector pieces have stop members which abut the edges of the frame sections and provide a gap therebetween. The lower stop member is offset rearwardly from the body portion of the connector piece and the edge portion of the oval duct extends outwardly into the gap portion. The oval duct end portions are connected to the duct connector frame members and pairs of frame members are positioned in adjacent relation with a gasket member therebetween. The connecting members include a securing device to secure the adjacent frame members to each other and exert a compressive force on the gasket member therebetween.

Abstract: A duct connector frame having frame sections with a bottom wall, a front wall, a top wall and a rear wall. The rear wall extends downwardly at an angle to the front wall and forms a generally triangular opening in the frame section. A channel shaped pocket or support member is formed in the opening to receive and support the lower edge of a corner piece leg portion and the rear wall, adjacent the top wall, has an inturned portion that forms a stop within the opening for the upper rear surface of the corner piece leg portion. The support member and the stop maintain the corner piece leg portion in the opening in fixed abutting relation with the rear surface of the frame front wall.

Abstract: A joint assembly for connecting the ends of a pair of generally rectangular sheet metal duct sections includes a pair of frame members secured to each other and connected to the respective duct end sections. The frame members each include four flange portions. Each flange portion has an upstanding channel shaped leg portion and an angularly extending duct receiving leg portion. A corner piece connects adjacent flange portions and extends into the channel portions of the upstanding leg portions to form the generally rectangular frame. The end portions of the ducts are inserted into longitudinal openings of the duct receiving leg portions. A flowing type gasket material is positioned in a longitudinal pocket of each flange. The end of each duct wall partially displaces the gasket material so that the gasket material extrudes outwardly around the duct wall and between the ends of the flange portion and the corner piece.

Abstract: A pair of frame members are secured to the ends of a pair of ducts having a generally circular or arcuate configuration. Each frame member has the same generally circular or arcuate configuration and has an inner vertical wall and an outer vertical wall. The outer vertical wall is connected to a sloped rigidifying portion which extends outwardly from the inner vertical wall. Both the inner and outer vertical walls have horizontally extending flanges which are in abutting relation and their end portions are clampingly engaged. The frame members have a circumferential or peripheral dimension less than the circumferential or peripheral dimension of the duct member so that at least one gap is formed in the circular or arcuately shaped frame member. The frame members are positioned on the duct end portions by inserting the frame member flange portion inside the duct end portions with the top surface of the frame member upper flange abutting the underside of the duct.

Abstract: A pair of frame members are secured to the ends of a pair of adjacent generally circular ducts. Each frame member includes a vertical wall extending upwardly from the circular duct and a sloped outer wall angularly spaced from the vertical wall. Each frame member includes an annular pocket for receiving an end of the circular duct, and a base wall abutting the annular pocket. The base wall has a rebent end portion for engaging a plurality of protuberances positioned on the inside wall of the circular duct. The frame members have an expanding means to urge the frame end portions away from each other to increase the diameter of the frame and engage the duct end portion. A gasket is positioned between the vertical walls of adjacent frame members to contact the adjacent vertical walls, and a clamp is positioned in surrounding relationship with the pair of adjacent frame members secured to the pair of adjacent circular ducts. The clamp has a pair of legs, each leg contacting a frame member sloped outer wall.

Abstract: A pair of frame members are secured to the ends of pair of adjacent generally circular ducts. Each frame member has a generally circular configuration and has an inner vertical wall, an outer vertical wall. The outer vertical wall is connected to a sloped rigidifying portion which extends outwardly from the inner vertical wall. Both the inner and outer vertical walls have horizontally extending flanges which are in abutting relation and their end portions are clampingly engaged. The frame members have a circumferential dimension less than the circumferential dimension of the duct member so that a gap is formed in the circular frame member. The frame members are positioned on the duct end portions by inserting the frame member flange portions inside the duct end portions with the top surface of the frame member upper flange abutting the underside of the duct.

Abstract: A joint assembly for connecting the ends of a pair of generally rectangular sheet metal duct sections includes a pair of frame members secured to each other and connected to the respective duct end sections. The frame members each include four flange portions. Each flange portion has an upstanding channel shaped leg portion and an angularly extending duct receiving leg portion. A corner piece connects adjacent flange portions and extends into the channel portions of the upstanding leg portions to form the generally rectangular frame. The end portions of the ducts are inserted into longitudinal openings of the duct receiving leg portions. A flowing type gasket material is positioned in a longitudinal pocket of each flange. The end of each duct wall partially displaces the gasket material so that the gasket material extrudes outwardly around the duct wall and between the ends of the flange portion and the corner piece.

Abstract: A welding gun of an arc welding machine is mounted for vertical reciprocal movement on a movable frame portion. The movable frame portion is connected to a stationary frame portion by piston cylinder assemblies which upon actuation raise and lower the movable frame portion into an out of position for locating the welding gun in position for welding together a pair of longitudinal sheet metal member edges positioned in a preselected relationship on the stationary frame portion. A pair of clamp plates are carried by the movable frame portion. When the movable frame portion is lowered the clamp plates are positioned oppositely of the pair of sheet member edges respectively to move into and out of clamping engagement with the sheet member edges. Once the sheet member edges are clamped in abutting relationship, the welding gun is advanced downwardly on the frame movable portion in a vertical linear path.

Abstract: A joint assembly for connecting the ends of a pair of generally rectangular sheet metal duct sections includes a pair of frame members secured to each other and connected to the respective duct end sections. The frame members each include four flange portions. Each flange portion has an upstanding channel shaped leg portion and an angularly extending duct receiving leg portion. A corner piece connects adjacent flange portions and extends into the channel portions of the upstanding leg portions to form the generally rectangular frame. The end portions of the ducts are inserted into longitudinal openings of the duct receiving leg portions. A flowing type gasket material is positioned in a longitudinal pocket of each flange. The end of each duct wall partially displaces the gasket material so that the gasket material extrudes outwardly around the duct wall and between the ends of the flange portion and the corner piece.

Abstract: A plurality of flange members are positioned oppositely of one another on the ends of a pair of generally rectangular sheet metal ducts. The flange members are positioned in pairs on the adjacent ends of the ducts. The angular legs of corner pieces extend into the ends of the flange members to connect the adjacent flange members on the end of each duct so that four corner pieces connect the flange members to form a frame around the respective duct end portion. The oppositely positioned flange members on the adjacent duct end portions are sealingly secured together by clamping together the adjacent corner pieces. Each flange member is formed by a thin walled sheet member and includes a pair of legs angularly disposed relative to one another to form a plurality of wall sections. A first wall section terminates in a first leg end portion, and a second wall section terminates in a second leg end portion. The first and second leg end portions are spaced apart.

Abstract: A plurality of flange portions are positioned oppositely of one another on the ends of a pair of generally rectangular sheet metal ducts. The flange portions are positioned in pairs on the adjacent ends of the ducts and each flange portion includes an upstanding wall having a pair of end portions for receiving the right angle legs of corner pieces. Four corner pieces extend into abutting relation with the upstanding walls at the four corners of the end of each duct to form a frame around the duct end portion. Each corner piece has a corner section, and a pair of legs extend angularly from the corner section. The pair of legs extend into abutting relation with the upstanding walls of adjacent flange portions on each duct end portion. In the assembled joint, the frames around the duct end portions are oppositely positioned with a gasket member positioned between the flange upstanding walls and the surfaces of abutting corner pieces. Each corner piece includes a corner and an outer edge with a corner flange.

Abstract: A joint assembly for connecting the ends of a pair of generally rectangular sheet metal duct sections includes a pair of frame members secured to each other and connected to the respective duct end sections. The frame members each include four flange portions. Each flange portion has an upstanding channel shaped leg portion and an angularly extending duct receiving leg portion. A corner piece connects adjacent flange portions and extends into the channel portions of the upstanding leg portions to form the generally rectangular frame. The end portions of the ducts are inserted into longitudinal openings of the duct receiving leg portions. A flowing type gasket material is positioned longitudinally in the flanges in a longitudinal pocket formed between an inturned rebent portion and the upper horizontal surface of the bottom wall of the duct receiving leg portion.

Abstract: A second workpiece component, such as a rectangular frame member, is positioned on a first workpiece component, such as the end of a rectangular duct. The first workpiece component is engaged by a clamp member secured to a frame so that the first workpiece component remains fixed relative to the frame. A positioning device, which is secured to a securing device such as a spot welder, is moved into abutting relation with the second workpiece component. The positioning device moves the second workpiece component to a preselected location on the first workpiece component while the securing device moves to a preselected location in overlying and underlying relation with the first and second workpiece components. In this position, the second workpiece component is secured to the first workpiece component at a preselected location.

Abstract: A workpiece positioning and securing apparatus includes a fixed frame for slidably supporting a welding machine into and out of a preselected position relative to a pair of workpiece components to be welded together. A first workpiece component is fixed by a clamping device on the frame. A second workpiece component is supported by a positioning member that is movable with the welding machine into a predetermined position relative to the first workpiece component. A pair of piston cylinders actuate the clamping device to fixedly engage the first workpiece component. A second pair of piston cylinders on the frame are operable to simultaneously move the welding machine and the second workpiece component into a preselected position relative to the first workpiece component.

Abstract: A joint assembly for connecting the ends of a pair of generally rectangular sheet metal duct sections includes a pair of frame members secured to each other and connected to the respective duct end portions. The frame members each have four flange portions with an upstanding channel shaped leg and an angularly extending duct receiving leg. Four angular corner pieces extend into the adjacent channel portion of the upstanding legs to form the generally rectangular frame. The end portions of the ducts are positioned in longitudinal openings in the duct receiving leg and are rigidly secured thereto by spot welding or the like. The frame members connected to the ducts are secured to each other by bolts or the like extending through adjacent corner pieces to rigidly connect the ends of adjacent duct sections. The upstanding channel shaped leg of the angle flange portion has an inturned rebent portion that forms a longitudinal pocket between the rebent portion and the lower wall of the duct receiving leg.