Abstract: An extension assembly for use with a damper assembly and for extending the damper assembly control shaft. The extension assembly is provided for coupling of a handle to the control shaft and includes an extension member, a locking member and a securing member. The extension member includes a connecting portion having a closed end and an open end. The open end includes a bore dimensioned to operatively receive the control shaft. The extension member further includes a shaft portion extending longitudinally from the closed end of the connecting portion. The shaft portion includes two parallel flat sides merging transversely with two opposite arcuate sides and dimensioned to be received by an aperture in the handle. The locking member provides the function of locking the control shaft within bore. The securing member ensures that the handle will remain a fixed distance from duct and provides a lock tight surface for a nut to engage and hold the handle.

Abstract: A polymeric chain consisting primarily of vinylidene fluoride, onto which is grafted a mono-unsaturated carboxylic acid, ester, or amide, for example acrylic acid, may be combined with a lithium salt and a solvent to form an electrolyte material. This may be used as electrolyte in a lithium cell, or may be combined with an insertion material to make a composite electrode for such a cell. The electrolyte, and so also the composite electrode incorporating this electrolyte, adheres well to a metal current collector.

Abstract: Tooling for forming an article which includes an injection molded peripheral frame defining an opening closed by a panel insert. The panel insert is struck from sheet material and together with an associated punch or carrier cooperates with a split mold to completely define the cavity for injection molding of the article. Inasmuch as the panel insert is heat bondable to the injection molded frame and forms a portion of the walls of the cavity, it is automatically bonded to the injection molded frame. The panel insert may be peelable from the frame and include a pull tab for effecting the same. The pull tab may be formed by the same punch which cuts out the panel insert, or the pull tab may be separately formed from sheet material adjacent an intended position of a panel insert and folded into overlying relation to the intended position of the panel insert and staked to the sheet material, after which the panel insert is cut from the sheet material by a punch.

Abstract: A mandibular arch expander for moving the lower teeth of an individual in better alignment with the upper teeth of the individual. The expander includes a first orthodontic band and a second orthodontic band attachable to opposite molars on each side of a patient's lower mouth. A first and second attachment device is provided for bonding to at least one tooth located between the lower molar and the incisor teeth. An expansion mechanism is provided for widening the mandibular arch near the front incisor teeth. The expansion mechanism is located between the first and second attachment device. A first helical spring apparatus is located between the first attachment device and the first orthodontic band and is actuable for applying both rotational and linear forces to the first molar tooth. A second helical spring apparatus is located between the second attachment device and the second orthodontic band and is actuable for applying both rotational and linear forces to the second molar tooth.

Abstract: The invention relates to a process for manufacturing an injection device of the pre-filled type comprising producing, in a deformable plastics material, a tubular syringe body (101) equipped with an external locking element (104) suitable for deforming radially between retracted and dilated positions, producing a tubular sheath (109) equipped with an internal locking element (110, 111) paired with that of the syringe body (101), fitting the sheath (109) round the syringe body (101), by a relative sliding of these latter permitted by the radial retraction of the locking element (104) of the syringe body (101), and introducing into the syringe body (101) a rigid pre-filled container suitable for bringing the locking element (104) of the said syringe body into its dilated position, enabling an irreversible locking of the sheath (109) to be obtained once it has been brought, after injection, into an advanced, post-use protection position.

Abstract: An apparatus for detecting the presence of volatile substances in a gaseous medium, including apparatus for producing within a sensor chamber a localised electric field the energy density of which is sufficient to excite the gaseous medium to a plasma condition, and apparatus for detecting changes in a parameter of the plasma due to the presence of the volatile substances in the gaseous medium.

Abstract: A vinyl weld seam cleaner having a fixed support head and a movable support head. The movable support head accommodates windows of varying widths. Each support head has an upper and lower machine head that houses a tool head. The tool heads have interchangeable tools. The machine head and tool head cooperate together to allow tools on the tool heads to move in three dimensions. The tools can clean and machine at a 45.degree. angle along a weld seam or at a 90.degree. angle relative to the top, sides and bottoms of a window frame. The window frame is engaged by an inner conveyor belt that moves the frame into and out of a first cleaning position for cleaning and machining the top corners of the window frame, and into and out of a second cleaning position for cleaning and machining the bottom corners. The inner conveyor includes fixed and movable fences, tabletop back fences, and clamps. The top corners are simultaneously cleaned and the bottom corners are simultaneously cleaned.

Abstract: Apparatus provides an air/fuel mixture to a fully premixed burner and comprises means for providing fuel at a variable flow rate to the burner, means for supplying air at a variable flow rate to the fuel to form the mixture, means for sensing aeration of the fuel combustion products and control means for controlling the fuel flow rate in dependence upon a heat output demand and the air flow rate in dependence upon both the fuel flow rate and the sensed aeration in such a way that the air flow rate is sufficient to maintain the aeration at a predetermined value, the controller, in use, maintaining the fuel flow rate at one of a number of predetermined values and the air flow rate at a corresponding one of a number of differing predetermined values, each set of predetermined values being characterized by a constant value of the ratio between successive values.

Abstract: Apparatus provides an air/fuel mixture to a fully premixed burner (4) and comprises a fuel line for providing fuel to the burner (4) a fan for supplying air at a variable flow rate to the fuel to form the mixture, a sensor (30) for sensing aeration of the fuel combustion products and a controller (26) for controlling the air flow rate in dependence upon the aeration sensed in such a way that the air flow rate is sufficient to maintain the aeration at or close to a predetermined value, the controller, in use, maintaining the air flow rate at one of a number of differing predetermined values which are in the form of a geometric series characterized by a constant value of the ratio between successive values.

Abstract: A hose coupling incorporates a male part and a female part that is provided with a mechanism, which in cooperation with a slide axially displaceable on the female part renders possible pressure relief at disconnection. One of the mechanisms in the coupling is an angular locking body including a portion that is insertable in an axial groove in the female part, and has a length, such that the angular locking body is always at least substantially surrounded by a sleeve. The other inwardly directed part of the locking body has a length, such that the part extends into the groove of the male part when the locking body is influenced by the sleeve.

Abstract: A heavy duty clamp for cables or wires, and the like, said clamp having increased strength and resistance to distortion or breakage. Two overlying clamp plates, or segments, are held against relative movement by one of the plates having a shoulder member that engages with a portion of the other plate. The plates contain a split, tubular gripping member and the plates have increased longitudinal strength by having extended ends of the plates to provide protection against shearing forces created by the split tubular gripping member against the adjacent ends of the clamp plates.

Abstract: The present invention provides a valve for use in a lubrication oil circulation system associated with the compressor of a refrigeration system, which valve has internal operating components which can be removed through a sealable access opening in the wall of the body of the valve, thus allowing the operating components of the valve to be inserted into and removed from the valve body through the access opening. This permits the valve body to be connected to the pipework of the circulation system by welded joints in place of the but joints used hitherto. The invention also provides a lubrication oil circulation system incorporating a valve mechanism of the invention.

Abstract: A clamp comprises a tubular support having a number of axially spaced sets of angularly spaced apertures for receiving spheres engageable with the exterior of a pipe and with tapered surfaces on a clamp body. A spring urges the support down in relation to the body to cause the spheres to grip the pipe. Rams can raise the support to release the clamp, whereupon the spheres can enter recesses in the body. The apertures may be axially elongated to accommodate a degree of pipe ovality and have diverging walls for the same purpose. A form of the clamp for gripping a pipe interior is also described. The clamp may have one or more seals for sealing against the pipe and two oppositely acting clamps may form a connector for two pipes.

Abstract: A method for permitting the joining together of two adjacent pipe lengths with adjacent ends curving with substantially the same sense, the method comprising rotating the end of one of the pipe lengths about its axis until it curves in substantially the opposite sense to the curve of the adjacent end of the other pipe length.

Abstract: A filter which can be cleaned in situ consists of a filter membrane (33), and fluid permeable electrodes (34, 35). The membrane may be one of the electrodes, or may be electrically non-conducting but integral with or in contact with one of the electrodes (34). The electrodes (34, 35) are separated from each other only by a fluid permeable electrically insulating sheet. This sheet may be less than 1 mm thick, and may be the filter membrane (33). The filter is cleaned by periodic brief applications of electric current between the electrodes (34, 35) so that gas is generated electrolytically, and the close spacing of the electrodes (34, 35) reduces the electric power required.