Abstract: A round back spring binder having spring clamp elements formed with intersecting end portions which have to be spread apart in order to assemble the spring clamp elements into the binder, thereby pre-loading the back of the binder with an initial spring bias. When spread apart, the end portions of the spring clamp elements are angled toward a common line which is centered with respect to the back of the binder.

Abstract: Paint applicator means for applying paint to a pad painter, comprising a conventional paint tray, a paint transfer roller, and mounting means for rotatably supporting the paint transfer roller on the conventional paint tray in partial immersion in the paint contained therein. Paint is applied to the pad painter by moving the pad painter across the paint transfer roller and causing the roller to rotate in the paint, thereby picking up paint from the paint tray and transfering it to the pad painter. The mounting means is adaptable to both deep and shallow well paint trays, and it includes support means for adjustably supporting the paint transfer roller a predetermined distance above the bottom wall of the paint tray, and at selected heights relative to the surface level of the paint.

Abstract: A intubating pharyngeal airway having a side access for passage of a tube on the said airway comprising a flanged stop at the proximal end, a curved airway central tubular member and a distal ball tip adapted to fit into the vallecular. The side opening may be expanded or closed by means of either a hinge on the opposite side wall of the tube or by a cap or insert closure.

Abstract: A intubating pharyngeal airway having a side access for passage of a tube on the said airway comprising a flanged stop at the proximal end, a curved airway central tubular member and distal ball tip adapted to fit into the vallecular. The side opening may be expanded or closed by means of either a hinge on the opposite side wall of the tube or by a cap or insert closure.

Abstract: A intubating pharyngeal airway having a side access for passage of a tube on the said airway comprising a flanged stop at the proximal end, a curved airway central tubular member and a distal ball tip adapted to fit into the vallecular. The side opening may be expanded or closed by means of either a hinge on the opposite side wall of the tube or by a cap or insert closure.

Abstract: A intubating pharyngeal airway having a side access for passage of a tube on the said airway comprising a flanged stop at the proximal end, a curved airway central tubular member and a distal ball tip adapted to fit into the vallecular. The side opening may be expanded or closed by means of either a hinge on the opposite side wall of the tube or by a cap or insert closure.

Abstract: An expansion stud for use in a blind bore hole or the like formed in a concrete anchorage or like support, wherein an expansion sleeve is caused to expand radially in perpendicular relation to the longitudinal axis of the expansion stud and to the bore hole wall. The stud is provided at its inner end with a conically tapered wedge tip formation whose smaller end is integral with the main body of the stud. The expansion sleeve is provided with an internal conically tapered bore which corresponds to the conical taper of the wedge tip, such that axial outward movement of the stud relative to the expansion sleeve causes radial expansion thereof perpendicular to the stud axis and the bore hole wall.

Abstract: A unitary socket terminal for electronic circuits, said socket terminal having lead ingress guide means and internal lead gripping means. The guide means provides unimpeded ingress to the lead gripping means. The socket terminal may also be provided with external contact or terminal means.

Abstract: An attenuation spot filter adapted to extend the light intensity range of usefulness of cameras, particularly television cameras, by attenuating the input light intensity in accordance with reduced iris aperture, comprising an optical element having at its center a thin film coating the density of which decreases in a radially outward direction whereby light attenuation is a minimum at maximum iris aperture and is maximum at minimum iris aperture.The attenuation spot filter is manufactured by a thin film carbon deposit of controlled thickness and diameter onto an optical flat which is, after deposition, coated. The flat is held horizontally for vertical axial rotation about a controlled flame, with the distance between the flame and the flat being cam-controlled and with the flame jet being secured for vertical axial movement with a cam follower. The coating is float-applied for uniformity and the coating material is an alkyd resin and lacquer thinner mixture.

Abstract: An attenuation spot filter adapted to extend the light intensity range of usefulness of cameras, particularly television cameras, by attenuating the input light intensity in accordance with reduced iris aperture, comprising an optical element having at its center a thin film coating the density of which decreases in a radially outward direction whereby light attenuation is a minimum at maximum iris aperture and is maximum at minimum iris aperture.The attenuation spot filter is manufactured by a thin film carbon deposit of controlled thickness and diameter onto an optical flat which is, after deposition, coated. The flat is held horizontally for vertical axial rotation about a controlled flame, with the distance between the flame and the flat being cam-controlled and with the flame jet being secured for vertical axial movement with a cam follower. The coating is float-applied for uniformity and the coating material is an alkyd resin and lacquer thinner mixture.

Abstract: A fin comb for combing, straightening and cleaning fins of heat exchangers, such as fin-type condensers and evaporators used in refrigeration and air conditioning systems. The fin comb comprises a handle and a plurality of fin combing heads which are interchangeably mounted on the handle. The fin combing heads are provided with fin-shaped teeth of different thickness and spacing for engaging heat exchanger fins of different thickness and spacing. The fin combing heads are also reversible on the handle to adapt the fin comb to both pulling and pushing strokes relative to the heat exchanger fins. The fin combing heads are color coded for easy selection of the right size for the various heat exchanger fin assemblies which are normally encountered by refrigeration and air conditioning servicemen.

Abstract: A hollow insole provided with non-communicating compartments which are filled with liquid to form individual foot-supporting cushions. Included in the invention is a method of making the insole.

Abstract: A book holder for enclosing and holding books, said book holder having a pair of cover panels, a back panel hingedly connected between said cover panels, book holding means on the cover panels, and a transverse spring element mounted in and across said cover and back panels, the spring element being normally extended in a generally straight line and in a generally common plane to support the book holder and a book held therein, in substantially flat, open position. The spring element is resiliently bendable transversely of its length to close the book holder and book held therein. A book holding strap is transversely disposed across the book holder, extending across a book held therein when the book holder and book are both in open position, said strap extending around the book holder when the latter and the book contained therein are in closed position.

Abstract: The invention comprises a darkroom safelight having (a) a light filter consisting of negative color film which has been exposed to a white light source (such as a generally continuous, uninterrupted light-reflective surface illuminated by white light) and then developed with color developer, and (b) at least two color filters selected from the colors of magenta, cyan and yellow. The minimum densities of these color filters are determined by the work-fogging factor; the maximum densities are determined by the factor of visual illumination of the work area.

Abstract: A keyless padlock seal for shipping containers, highway trailers, railroad box cars and the like, comprising a lock body and a hasp which is spring-locked to said lock body. The hasp cannot be removed from the body without destruction of either the hasp or the body. A code-marked seal may be provided on the lock body and secured thereto in such manner that it cannot be removed or replaced without at least partial destruction of the padlock and evidence of tampering.

Abstract: A generally portable industrial mop treating machine which draws mop treating liquid directly from a shipping and storage container and sprays same upon mops which are driven through the machine. The spray means is actuated by the passing mops and becomes inoperative in their absence.

Abstract: For use in conjunction with building construction, a safety net intended to be supported outwardly of the edges of the floors of the building, comprising a net fabric supported at its inner end by a bracket secured to the upper of two adjacent floors, and secured at its outer end to the top of an extension pole the bottom of which is supported in an adjustable pole bracket secured to the lower of the two adjacent floors.

Abstract: Collapse-resistant paperbox packaging for small articles, comprising an outer paperbox shell and an inner corrugated paperboard sleeve removably encased within said paperbox shell, said corrugated paperboard sleeve having a transparent plastic skin laminated thereto with an article secured between them, and said corrugated paperboard sleeve having upwardly extending flanges which juxtapose side panels in the paperbox shell. The corrugated paperboard sleeve reinforces the paperbox shell and combines with it to provide a strong box construction highly resistant to collapsing. A window is provided in the paperbox shell so that the article may be exposed to view through said window and through the transparent plastic skin.

Abstract: A crutch construction for underarm and forearm crutches, wherein the handgrip is mounted, at least in part, forward of the longitudinal axis of the crutch, and the arm support is mounted, at least in part, rearward of said longitudinal axis. The arm support is adjustably mounted for movement at an angle within a range of about 5.degree.-20.degree. to said longitudinal axis. The thrust line of the crutch is located slightly forward of the longitudinal axis of the crutch. The handgrip is substantially centered relative to the thrust line of the crutch, and the longitudinal axis of the handgrip is substantially normal to said thrust line. The arm support is laterally adjustable relative to the handgrip for proper palm placement and wrist angulation and to enable to the user of the crutch to apply a forward rotational bias to the crutch sufficient to hold the arm support securely and comfortably against the arm of the user, but insufficient to render the crutch unstable.

Abstract: An adjustable oral airway comprising a superior section and inferior section joined at their inner ends by a hinge member, and slidably secured relative to each other at the mouthpiece end, as by a tongue and groove slidable joint. The superior and inferior sections may be spaced a greater or a lesser distance from each other by means of sliding the upper and lower sections of the mouthpiece to improve ease of insertion and removal and to expand or reduce the pharynx, lifting the epiglottis and improving the breathing ability of an unconscious patient.