摘要:
A exercise device includes: a u-shaped frame; first and second arms pivotally coupled to ends of the frame; a first pair of bands that resist pivotal movement between the u-shaped frame and each of the first and second arms; and an arm bar. The arm bar is releasably coupled proximate to the free end of each of the first and second arms. As configured the device is usable for a first set of exercises. A first end of each of a second pair of resistance bands is respectively secured in proximity to first and second ends of the arm bar. The second ends of the second pair of resistance bands have loops fixedly secured thereto. When the arm bar is not releasably secured to the first and second arms, it is usable in combination with those bands and loops for a second set of exercises, providing a full body workout.
摘要:
The apparatus comprises a printing cylinder for printing an element such as a paper web and feed and take-up rollers for the web. Sensors are provided for sensing the relative positioning of the web and the print which is applied to the web and the signals from the sensors are fed to a micro-processor. The micro-processor controls the feed and take up rollers so that if the relative positioning of the web is incorrect, the feed and take-up rollers are controlled simultaneously to move the web relative to the printing cylinder substantially without varying any tension in the web between the feed roller and the take-up roller.
摘要:
The invention relates to the handling of particulate materials such as foundry molding sand requiring cooling. The operating vessel has an inlet, through which material is charged to flow-downwardly in the vessel against an upward flow of pressurized fluid, usually air, there being provided sensing and signalling probes to sense the height of the fluidized material in the vessel at a pedetermined maximum level in the vessel and at a predetermined minimum level. These sensing and signalling probes control the outlet of cooled sand from the bottom of the vessel, stopping it when the minimum level is sensed and re-commencing discharge when the maximum level is reached.
摘要:
During scribing of a ceramic plate with a laser beam, ceramic particles rise from the workpiece in a direction of motion that is generally the same as that of the workpiece. The lens on a laser scriber is protected from abrasive contact with such particulates in the atmosphere by slipping the base of a housing over the circumference of the lens mount and forming a generally airtight seal between them. The housing is shaped like a frustum of a right circular cone, with the apex end thereof truncated and essentially rolled over to form an orifice through which the lens axis and laser beam pass. A plurality of streams of pressurized air are introduced into the housing near the midpoint of the frustum and the lens surface. The air streams are introduced tangent to the inner surface of the housing and angled downward for producing a vortex of air that is exhausted to the atmosphere through the orifice at a velocity and vorticity that inhibits particulates outside of the cover entering the orifice. A suction hose is located in front of the housing for removing particulates from this area. In an alternate embodiment, a directional air lock door is established in front of the lens, with the airstream that establishes the door being directed into a suction hose. The direction of this airstream is preferably maintained the same as the direction that the workpiece moves.
摘要:
A substrate grader accepts or rejects a substrate depending upon the degree of warp and then sorts the accepted substrates according to a dimension thereof. The grader comprises a first plate which is U-shaped and inclined at an acute angle with respect to the horizontal, the two arms of the first plate extending above the base thereof. A first elongated member (or lower guide) that is attached to the front of the base has a straight side which is adjacent to and spaced a short distance away from the opening in the first plate. A second elongated member, that is attached to the back of the free ends of the arms, supports a second plate (or upper guide) thereon which extends between the arms, which has a top surface in a plane containing the top surfaces of the arms and base, and which has a stepped edge in the opening. Successive stepped surfaces of this edge are parallel to and spaced progressively farther from the straight surface of the first member such that rectangular substrates contacting these spaced apart surfaces may fall through an opening therebetween to be sorted according to ranges of the length thereof. A pair of flat plates that are supported a prescribed distance above one arm receive substrates therebetween for measuring warp in the substrates. The first plate is mounted on a vibrator which causes substrates to move across this plate.
摘要:
An anode assembly for use in a system for the cathodic protection of a submerged, or partly submerged elongate metallic member the assembly being adapted to be fixed to and to encircle a length of said member. The assembly includes a plurality of generally flat, elongate electrically insulating panels of which at least one accommodates a metallic element which will constitute an anode in the aforesaid system, and a cable for providing electrical connection to the metallic element, the panels being adapted to be interconnected, in use of the assembly, and circumferentially disposed around the elongate member with part of the surface of the metallic element exposed outwardly of the elongate member. When so interconnected, the panels form a space between the assembly and the elongate member, and the assembly is apertured to permit electrical current to flow into this space to the elongate member from the metallic element when operating as an anode in the system.
摘要:
During scribing of a ceramic plate with a laser beam, ceramic particles rise from the workpiece in a direction of motion that is generally the same as that of the workpiece. The lens on a laser scriber is protected from abrasive contact with such particulates in the atmosphere by slipping the base of a housing over the circumference of the lens mount and forming a generally airtight seal between them. The housing is shaped like a frustum of a right circular cone, with the apex end thereof truncated and essentially rolled over to form an orifice through which the lens axis and laser beam pass. A plurality of streams of pressurized air are introduced into the housing near the midpoint of the frustum and the lens surface. The air streams are introduced tangent to the inner surface of the housing and angled downward for producing a vortex of air that is exhausted to the atmosphere through the orifice at a velocity and vorticity that inhibits particulates outside of the cover entering the orifice. A suction hose is located in front of the housing for removing particulates from this area. In an alternate embodiment, a directional air lock door is established in front of the lens, with the airstream that establishes the door being directed into a suction hose. The direction of this airstream is preferably maintained the same as the direction that the workpiece moves.