Abstract: An oral hygiene device comprising a detachable head and a handle into which the detachable head can be inserted. A plurality of detachable heads each having a different oral hygiene means thereon is also provided. The detachable heads and the handle form a system for complete oral hygiene home care unit.

Abstract: A toothbrush system is provided wherein a plurality of disposable heads may be inserted onto a disposable stem, allowing the use of a wide variety of specialized heads on both manually operated and power toothbrush handles. The system permits the head and stem designs to be custom tailored to the individual patients' needs in terms of mouth size, brushing comfort, dental and periodontal needs, as well as convenience both at home and away from home. The modular system also permits the patient to clean his teeth in a more aseptic manner than would otherwise be possible.

Abstract: A toothbrush has a bristle bearing head terminating the supporting stem thereof which extends from a handle. The head is disposed with its major axis at right angles to the length of the stem providing lateral extensions having bristles arranged for interproximal and free gingival margin engagement of both the maxillary and mandibular teeth. The supporting stem has a portion adjacent the head offset from a handle connecting end, the latter having a snap-in bearing connection with the handle providing easy separation and assembly and relative rotation of the handle with respect to the stem and head.

Abstract: A scaffolding structure comprising upright members connected together by cross members and including additional members which serve as braces, including at least one brace secured to a member, the brace being provided with at least one transverse pin and the member being provided with an aperture for the reception of the pin, the brace having means captively associated therewith for releasably restraining the brace from movement in a direction longitudinally of the pin.

Abstract: In builders scaffolding of the kind in which cross members are connected to upright members by means of a wedge clamping member extending through apertures in opposed limbs of a C section bracket which is arranged to embrace a socket member secured to the upright member, whereby the wedge clamping member extends through the socket member and urges the limbs of the bracket into pressure engagement with the upright member, the upper limb of the bracket is formed with a depression adapted to enter the open upper end of the socket, whereby the bracket can be made more easily and cheaply than in the previous arrangement in which the upper limb was provided with external dependent lips to engage the outside of the socket member.

Abstract: To enable a scaffolding structure to serve vertically curved structures such as ships' hulls, a joint is provided to allow vertically adjacent scaffold uprights to be relatively inclined to one another in a vertical plane. Transom elements and staging brackets are provided with pivotally mounted means for connection to the inclined uprights so as to enable staging to be carried substantially horizontally.

Abstract: A drill in which a drilling apparatus is releasably mounted on the bottom of a drill string and on release can be withdrawn upwardly through the drill string by wire-line. The main cutting bit is disposed on the bottom end of the removable apparatus and the apparatus includes expandable cutters disposed above the main cutting bit to ream the hole cut by the main bit to permit the drill string to follow down the hole. The cutters are retracted for withdrawal of the apparatus.

Abstract: A system for injecting sample fluids into an analyzer and processing the analysis data is disclosed. The system includes a fluid sample analyzer, a sample storage module for a number of fluid samples, an injection module by which samples are injected into the analyzer, and a control module for governing and sequencing the operation of the system. The storage module houses a plurality of sample-containing trays which can be loaded with samples remote from the system. A gas operated liquid purging system is employed for minimizing the quantity of residual material injected into the analyzer with successive samples, which system operates over a broad range of purging fluid viscosities using excessive amounts of fluid purge material.