Abstract: A compact high zoom ratio lens comprising from the object end a front positive stationary lens unit, a negative variating lens unit, a positive variating lens unit and a compensate lens unit, the variating lens units and the compensator lens unit being axially moveable to vary the equivalent focal length of said lens, the compensator group having an object magnification change of less than twenty-five percent over the zoom range of the lens.

Abstract: An electromagnetic shear lock comprising an electromagnet having an E-shaped cross section with a coil positioned about the middle leg of the E is mounted to a doorway and an armature is mounted to the door, where in one form the middle leg of the E is shortened to define a recess to receive an elongated armature member and provide mechanical reinforcement against shearing when the electromagnet is energized. The armature is constructed of at least two telescoping members where the outer armature member is U-shaped with legs which contact the outer legs of the electromagnet and the inner member is attracted into the defined recess and will engage the inner surfaces of the outer legs of the electromagnet. Even if the outer member is pryed down from the electromagnet, at least the inner armature members will still be in a magnetic circuit with the inner electromagnet armature member in the defined recess and providing mechanical reinforcement in engaging the inner surfaces of the outer legs.

Abstract: A catadioptric zoom lens comprising from the object end a first catadioptric group including a relay subgroup for forming an intermediate image, zoom relay, the zoom relay including a positive variator group and a negative power compensator group, the variator group comprising a first sub-unit of weak power contributing to correction of coma and a second sub-unit providing most of the positive power of the variator group.

Abstract: A projection lens in which a lens unit which may comprise one or two elements is closely coupled at the object end of the lens to a cathode ray tube. At the image end is a lens unit of overall weak optical power which comprises from the image end a first positive element followed by a closely spaced negative element of substantially higher dispersion. Intermediate the object side lens unit and the image side lens unit is a lens unit of substantial optical power supplying substantially all of the positive optical power of the lens. Closely spaced to this power lens unit on the object side is a negative lens element of high dispersion. This negative lens element may be considered to be part of the power lens unit.

Abstract: A support device for enabling paralytics to stand erect, including a flexible housing member having a back portion adapted to be fitted to the back of a paralytic and extending into two leg portions adapted to be fitted to the rear of the legs of a paralytic, an expansible bladder having at least two inflatable chambers is received within the housing, the chambers are joined together at edges thereof to define the back portion and separating into two leg portions, a first strap affixed to the back portion of the housing at the side thereof engaging a paralytiac, one or more other straps are affixed to each of the leg portions of the housing member at the side engaging a paralytic, the first strap is arranged to pass over the chest of a paralytic and secure the back portion to the paralytic, the other strap or straps are arranged to pass around the legs of a paralytic and secure the leg portions to the paralytic.

Abstract: A container comprising a base member of generally circular form where two side panels are defined on fold lines which are first and second chords of the base panel and are folded over and affixed to each other to define a pocket with a base panel, another panel is defined on the base panel by fold line which is a chord substantially co-terminal with the first and second chords.

Abstract: A coupon holder adapted to be permanently mounted to the handle of shopping cart which comprise a one piece member of plastic material having two spaced apart coupon receptacles joined by an upper arcuate portion adapted to be received on the handle whereby the receptacles depend on either side of the handle, and at least one strap member attached extending between the receptacles, the strap member flexing the arcuate portion to cause it to secure the coupon holder to said handle.

Abstract: A two lens unit zoom lens of plus, minus configuration where the rear negative group provides the primary variator function and the positive first lens unit consists of a negative sub-unit and a positive sub-unit and where the sub-units may move differentially during zooming.

Abstract: A hollow illuminated fishing bobber of generally spherical shape, comprising two substantially hollow hemispherical shell members with cooperating joining means on each of the shell members for joining the shell members together to form the generally spherical shape and with an annular sealing member interposed between the shell members, a lamp member having elongated electrical leads, one of the shell members is adapted to be the upper member and has apertures therethrough for receiving the lamp leads. An elastic pocket member is disposed within the hollow bobber receiving a disc type battery therein having terminals on either side thereof where the lamp leads extend into the pocket member on either side of the battery and are frictionally held in contact with the battery by the pocket member. The two shell members are identical and each defines an inner annular shoulder adjacent the open ends thereof.

Abstract: A method and an apparatus for use in dropping metal rod stock which is continuously formed in succeeding loops into a coil, where the loops are in spaced apart overlapping relationship moving on a conveyor where the apparatus comprises pinching means disposed on either side of a horizontal conveyor adjacent the drop-off end thereof and spaced a distance apart which is less than the width of the loops, the pinching means including movable means engaging the loops whereby the loops are compressed in one direction and elongated in the other as the loops pass through the pinching means and held in a generally horizontal plane after exiting the conveyor, and dropped vertically from engagement with the movable means to a collection device.

Abstract: A lens comprising from the image side a first lens unit which is a positive element with at least one aspheric surface; a three element lens unit consisting of a biconcave element, a biconvex element and another positive component, in that order; a third lens unit having a strongly concave image side surface and which serves as a field flattener and to correct the Petzval sum of the lens.

Abstract: A condiment container and dispenser comprising a container having a member therein defining a central chamber and a second chamber about the central chamber, the container has open ends with each chamber communicating with one of the open ends, a closure member closes each of the open ends and has openings therethrough, a spring member of conical shape defined by closely spaced helices of decreasing diameter normally closes each of the openings in the closure members and a plunger member is carried by each of the springs and extends from the closure members, the plunger members are effective to extend an associated spring and permit material to be dispensed from either end of the container and dispenser. A condiment container and dispenser embodying the invention is also useful when filling a smaller condiment dispenser which has a conical spring orifice.

Abstract: An operating handle for a winch having a four or eight-sided socket which comprises a hand engaging portion, a lever arm and a socket driver, the driver being of square shape and having a spring loaded detent therein arranged to extend outwardly of a side of the driver and engage a wall of a socket, the detent being positioned off-center of the vertical center line of the side of said driver and so positioned as to engage on a wall of an eight-sided socket.

Abstract: A cone clutch comprising a housing member defining an internal frustro-conical surface, an internal member having an mating frustro-conical exterior surface received within the housing member, the housing member and the internal member being relatively rotatable, a layer of friction material is disposed between the frustro-conical surfaces and is unbonded to either surface, and means are provided for biasing the internal member into engagement with the frustro-conical surface of the housing member.

Abstract: A climate control system, heating, ventilating, air conditioning, designed for air conditioning and ventilating in which outside air is periodically sampled and may be used for improved ventilating and room cooling with outside air to reduce compressor duty cycle, depending on the temperature and the set point of cooling and ventilating thermostats. The heating, in conjunction with a steam humidifier, is equally beneficial.

Abstract: A vehicle with a plurality of legs which selectively alternately support and advance the vehicle in horizontal straight line motion, each of the legs comprises a support member, and in one embodiment, a first gear nonrotatively affixed to the support member, a first link pivotally connected to the support member at one end thereof, a means for rotatably driving the link about the pivotal connection, an idler gear pivotally mounted to the first link intermediate the ends thereof and in driving engagement with the first gear, a second link pivotally connected at one end thereof to the first link at the second end thereof, the second link having a planet gear affixed thereto and engaging the idler gear, whereby when the first link is pivotally driven by the drive means through the idler gear and the planet gear produces angular motion of the second link about the pivotal connection between the links, the first link is constructed and arranged to limit the angular movement of said second link in either direction,

Abstract: A support system for the armature system of an electromagnetic shear lock on a door having a recessed top rail which comprises two pairs of spaced apart headed bolts threaded into the rail, each pair having a clamping plate below the heads thereof and a support plate resting on the heads of each pair, the support plate having recesses to provide access to the bolt heads, and the armature mounting plate is secured to the support plates. The bolt heads may be adjusted in height to align to the armature with a soffet mounted electromagnet.

Abstract: A backup board for use when drilling through a circuit board having a conductive layer therein, the backup board comprises a lamination of outer planar sheets, and an inner core of a double wall corrugated material, the outer sheets being impregnated with a thermosetting adhesive, the sheets and the core being subjected to heat and pressure to form a laminate where said corrugations fold over and bond to said outer planar sheets, to provide a backup board giving surface support by said outer sheets with a less rigid core therebetween.

Abstract: An electromagnetic shear lock comprising an electromagnewt having an E-shaped cross section with a coil positioned about the middle leg of the E is mounted in a doorway and an armature having a central projection is mounted to the door, where the middle leg of the E is shortened to define a recess to receive the armature projection and provide mechanical reinforcement against shearing when the electromagnet is energized. The inner edges of the outer legs of the E and the edges of the armature projection are matingly beveled to prevent binding when the electromagnet is de-energized and an airgap is defined between the middle leg of the E and the armature projection to overcome any effects of residual magnetism.