Abstract: The invention relates to a blasting apparatus for activating a plurality of electrical detonators after predetermined time delays. The blasting apparatus includes a plurality of remote electrical delay devices. Each device is linked to a detonator, and is arranged to be serially programmed with a timing signal, which originates from the central control unit and which determines the time delay. A bidirectional signal harness, having ends which terminate at I/O ports in the control unit, serially links the delay devices to the control unit. In the event of a fault of discontinuity occurring in the harness prior to programming of the delay devices, the discontinuity is detected and the direction of programming along the bidirectional harness is reversed so that those delay devices which, due to the break, cannot be programmed in the initial direction, are programmed with timing signals travelling along the signal line in the opposite direction.

Abstract: A communication system comprises a control station and a number of remote stations connected to the control station by a multi-conductor harness. The control station houses a computer and supplies the remote stations with electrical power, as well as communicating bidirectionally with the remote stations, via the harness. At each remote station, a sensor or other functional module is plugged into an interface. Communication circuitry receives data from and sends data to the control station. The remote station includes an identification device for storing a first code allocated to the remote station by the central computer which identifies the relative location of the remote station, as well as a second code generated at the remote station which identifies the function of the sensor or other functional module.

Abstract: The invention relates to a blasting apparatus for activating a plurality of electrical detonators after predetermined time delays. The blasting apparatus includes a plurality of remote electrical delay devices. Each device is linked to a detonator, and is arranged to be serially programmed with a timing signal, which originates from the central control unit and which determines the time delay. A bidirectional signal harness, having ends which terminate at I/O ports in the control unit, serially links the delay devices to the control unit. In the event of a fault of discontinuity occurring in the harness prior to programming of the delay devices, the discontinuity is detected and the direction of programming along the bidirectional harness is reversed so that those delay devices which, due to the break, cannot be programmed in the initial direction, are programmed with timing signals travelling along the signal line in the opposite direction.

Abstract: A process for conducting therapeutic deep tissue physical massage on human patients, and an aid for use in practicing the process, are characterized by a solid, massage stick comprised of three polyethylene glycols, namely, a major proportion of a first polyethylene glycol having a relatively high viscosity and a melting temperature in excess of the temperature of the human body, a lower proportion of a second polyethylene glycol having a melting temperature less than the temperature of the human body, and a minor proportion of a third polyethylene glycol exhibiting lubricity or emolliency.

Abstract: The invention relates to a blasting apparatus for activating a plurality of electrical detonators after predetermined time delays. The blasting apparatus includes a plurality of remote electrical delay devices. Each device is linked to a detonator, and is arranged to be serially programmed with a timing signal, which originates from the central control unit and which determines the time delay. A bidirectional signal harness, having ends which terminate at I/O ports in the control unit, serially links the delay devices to the control unit. In the event of a fault of discontinuity occurring in the harness prior to programming of the delay devices, the discontinuity is detected and the direction of programming along the bidirectional harness is reversed so that those delay devices which, due to the break, cannot be programmed in the initial direction, are programmed with timing signals travelling along the signal line in the opposite direction.

Abstract: An evaporative cooling system for buildings comprising means to draw air from the building, air ingress means having air permeable pads in an opening in the building, and water supply means to supply water to fogger nozzles which direct a water vapor fog toward the external surface of the pads, thus cooling the air drawn through the pads. The fogger nozzles are connected to interconnected water conduits, one of which is independently operated from the others such that it will only operate in cases of extreme temperature, to insure that the pads will not be oversaturated. Preferably, the water conduits are controlled by a thermostat responsive to the internal building temperature, while the independent conduit is controlled by a second thermostat responsive to the external ambient temperature.

Abstract: There is disclosed a containment tray which is formed of plastic which is molded into a tray having upright perimeter walls and a bottom wall having transverse channels in its undersurface for receiving the conventional arms of a forklift or pallet jack. The tray can be formed by vacuum thermal forming, in which case it is used in combination with a platform insert formed by a pair of beams which are received within the tray and which support transverse rails thereby forming an upper platform. Alternatively, the tray can be rotationally molded and the raised platform can be molded into the tray in the form of a plurality of upstanding plugs. In either embodiment, the upper planar surface of the raised platform is positioned above the level of the upper edges of the side walls of the tray whereby a conventional forklift can deposit loads of containers mounted on standard wooden pallets onto the raised platform of the tray, and remove those pallets, when desired.

Abstract: There is disclosed a containment tray which is formed of plastic which is molded into a tray having upright perimeter walls and a bottom wall having transverse channels in its undersurface for receiving the conventional arms of a forklift or pallet jack. The tray can be formed by vacuum thermal forming, in which case it is used in combination with a platform insert formed by a pair of beams which are received within the tray and which support transverse rails thereby forming an upper platform. Alternatively, the tray can be rotationally molded and the raised platform can be molded into the tray in the form of a plurality of upstanding plugs. In either embodiment, the upper planar surface of the raised platform is positioned above the level of the upper edges of the side walls of the tray whereby a conventional forklift can deposit loads of containers mounted on standard wooden pallets onto the raised platform of the tray, and remove those pallets, when desired.

Abstract: System for the electrical sequential initiation of explosions comprising a series of initiating modules connected to one another and connectable to a power supply, and a corresponding series of electrically actuable initiators. Each initiating module is connected to an initiator and embodies a non-latching switch for actuating the initiator associated with that initiating module. The non-latching switch comprises a solid state electronic device having an emitter, a gate and a collector, and comprises a short circuit between the gate and the emitter for holding the device in an "off" state to a voltage applied to the collector. The device also comprises an open circuit between the gate and the emitter for turning the device "on" to a voltage applied to the collector, while a diode integrated on the device blocks a reverse supply voltage. The non-latching switch of each initiating module save the first in the series is connected to the initiator associated with the preceding initiating module in the series.

Abstract: An easel-type mount for supporting calendars and memorandum pads on a desk of the kind embodying a display portion and headboard and a leg and brace interengageable to support the structure upright with the display portion and headboard disposed at an obtuse angle relative to each other and to a method of making the same.

Abstract: A nipple waterer having a tiltable spring biased valve, the valve seat being a plastic ring held in position by a stainless steel washer. The inlet to the nipple waterer having an adjustable orifice. The valve seat, valve, spring, and adjustable orifice being held in assembled relationship by a retaining ring connected to the inlet of the waterer.

Abstract: A connector for two or more electrical wires and having a multitude of wire receiving sockets each having a concealed metal sleeve therein to receive and hold an inserted wire end. A wire locking arrangement prevents accidental wire extraction. Each sleeve is capable of receiving different gauges of wire to permit connector use with wires of two or more gauges.

Abstract: An apparatus to vary the degree which a door may be opened and held in place. An operating arm of the door holder is pivotably mounted to a slide which is mounted within a slide channel. Holding means releasably hold the slide at a fixed position within the slide channel. The other end of the operating arm is pivotably mounted to an adjustable bracket. The bracket is seated within a track and is capable of adjustable movement along the track. Fastening means secure the bracket with respect to the track in a plurality of fixed positions.

Abstract: A child's Teeter Totter in which a seat is pivotally mounted in a frame and is supported by springs extending downwardly from an upstanding portion of the frame. The springs can be attached at adjusted positions to the seat for supporting children of different weights. A child using the Teeter Totter occupies the seat and grasps a handle projecting upwardly thereon and bounces the seat about its pivot by forcing his feet against the floor.