Abstract: A protective bag is applied to fruit growing on a plant for protecting the fruit from disease, insects, birds and so forth. The bag is colored with a coloring agent which has a property to gradually lower its sunlight shielding characteristic in response to irradiation by sunlight. The coloring agent initially provides substantially complete sunlight shielding characteristic and the sunlight shielding characteristic is lowered at a given rate to its minimum sunlight shielding characteristics.

Abstract: A unit for providing heating, ventilation, and/or air conditioning (HVAC, 15) is controlled by one or another thermostat (17a, 17b) in response to a switch (21) the setting of which is controlled by dual tone multiple frequency signals sent from a regular telephone (26) over ordinary phone lines (27). The functions of ring detection and answering a call (28) as well as tone detection (30) may be provided by selected modules (34-38) or by an answering machine (83). A switch used to select one of the thermostats may comprise a stepping relay (21a) a bistable toggle relay (21b), or a bistable relay 21c. The phone control switch apparatus may selectively apply power to an outlet (91) for running a self-contained HVAC such as an air conditioner (94) or a heater (95).

Abstract: An automobile door lock receiver module (30) and a plurality of keychain fob transmitter units (16) contain identification numbers, secret initial values, and secret feedback masks so as to authenticate encrypted messages from any of the assigned fobs, indicative of commands registered by closing switches on the fob. Each fob is synchronized with the receiving module by means of a truly random number concatenated with a secret initial value and encrypted, through a linear feedback shift register or other operations. A second secret initial value is encrypted and command bits are exclusive ORed into the low order bit positions; the two encrypted numbers are concatenated and encrypted to form a key word which is transmitted with the fob ID. Synchronization includes decrypting to recover the truly random number and the secret initial value concatenated therewith; the truly random number is compared with previously received random numbers in order to avoid copying of recently transmitted synchronization commands.

Abstract: An automobile door lock receiver module (30) and a plurality of keychain fob transmitter units (16) contain identification numbers, secret initial values, and secret feedback masks so as to authenticate encrypted messages from any of the assigned fobs, indicative of commands registered by closing switches on the fob. Each fob is synchronized with the receiving module by means of a truly random number concatenated with a secret initial value and encrypted, through a linear feedback shift register or other operations. A second secret initial value is encrypted and command bits are exclusive ORed into the low order bit positions; the two encrypted numbers are concatenated and encrypted to form a key word which is transmitted with the fob ID. Synchronization includes decrypting to recover the truly random number and the secret initial value concatenated therewith; the truly random number is compared with previously received random numbers in order to avoid copying of recently transmitted synchronization commands.

Abstract: A silt barrier includes a main frame (10) which is disposed horizontally over a catch basin which is to have silt blocked therefrom, the main frame (10) has end frames (24, 25) rotatable from a stored flat position into a vertical working position. A pair of wooden frames (26, 27, 30, 31) are lodged between the end frames (24, 25) and porous plastic silt barrier sheeting (48) is stapled (50-55) to the wooden frames, surrounding the entire structure. The silt barrier is clamped to the catch basin (41, 70) with j-bolts (38, 39).

Abstract: The emergency terminal stopping speed is checked by comparing (30) the number of pulses (26) provided by an encoder (10) driven by the elevator motor (12) with a fixed number (36) which for the particular elevator will correspond to the maximum allowable speed when received within a time frame determined by the overflow (46) from a presettable (44) counter (40). The time period is adjusted for each elevator installation so that the fixed number of pulses relate to the desired speed by adjusting the preset of the presettable counter. Floor leveling speed is also determined by comparing (32) the counted number of pulses with a settable (38) number.

Abstract: An elevator hall enunciator lantern includes an array (FIG. 2, FIGS. 4-8) of dual light, light emitting diodes 12-16, 56, 57 to be energized by a signal 35, 35a indicating the arrival of an up traveling elevator or the signal 36, 36a indicating the arrival of a down traveling elevator to provide a green indication or a red indication, respectively. The array may be configured so that the indication appears as an arrow 21, 22 pointing in the direction of the arriving elevator car. The indication may be scrolled (FIGS. 4-8) in the same direction as the direction of travel of the elevator car so as to provide an additional indication of the direction of travel of the arriving elevator car.

Abstract: A sterile kit for inserting an implant to which a dental prosthesis may be fastened, includes an implant (14) having a combined insertion tool/transfer pin (50) secured thereto by a screw (16), with a carrier (52) mating with the combined insertion tool/transfer pin to start the implant into a hole prepared therefor. The method of use includes taking an impression as soon as the implant is secured in the bone, thereafter removing the combined insertion tool/transfer pin, inserting a healing screw (38), and forming the model of the mouth and ultimate prosthesis and abutments in a laboratory while the several month healing process takes place.

Abstract: A tile spacer includes a platform (10) having opposite coplanar surfaces (11, 12) on which are disposed a straight spacer (13) and a corner spacer, either a cross-shaped spacer (14) or a tee-shaped spacer 15, respectively. One leg of the corner spacer (14, 15) is coaligned with the straight spacer (13) so as to assist in aligning either of the spacers while using the other spacer as a handle. The spacer (13) and the coaligned leg of the spacers (14, 15) may extend beyond the platform so as to assist aligning the spacer (13) when using the spacer (14, 15) as a handle.

Abstract: Liquified cryogen, such as nitrogen, from a source (43) is applied to a fiber mat (16, 18) adjacent to surfaces (10, 12) of an article (14) to be cooled. The cryogen may be delivered by a tube (40) which is disposed between the mat and a structure (20) to which the mat is fastened by press fit barbed fasteners (22).

Abstract: Electronic circuitry 22, 24, 26 is thermally checked by cooling with liquified nitrogen from a cryogenic delivery unit 19, directly by means of a stream 10 or a spray 28 delivered through an aperture 11, 30 of the delivery unit 19 spaced from the surface of the circuitry.

Abstract: A high integrity optical data transmission system connecting a plurality of user I/O devices includes an optical path terminating at each user I/O device at a two port interface having a pair of optical transmitter and a pair of optical receivers for optically communicating the binary logic ONE and ZERO states and the system no data transmission state. A portion of the light transmitted over the optical path is fed back to the interface to control the transmitted light intensity. The two photodiode light receivers are closely matched in electrical characteristics and are biased by adjustable DC voltage sources so that the effects of photodiode dark currents on a trans-impedance amplifier are minimized.

Abstract: The power required for a helicopter to hover is generated (14, 82) as the ratio of current operating power in forward flight (12, 77) determined (10, 73) from data relating operating power in forward flight to power required for hover for the aircraft. The power required to hover is compared (18, 83) with the maximum power available developed (16, FIG. 2; FIG. 3) by an engine model algorithm utilizing actual engine parameters. The comparison of maximum power to power required for hover is utilized to provide an indication (22) to the pilot. The viability of the indication is indicated by a "ready" indication (26).

Abstract: Signals which exceed a threshold magnitude (FIGS. 8, 15 and 17) produced by the upstream-most one of a plurality of electrostatic probes (1, 2, 27, 3, FIG. 1) are utilized (FIGS. 14, 16 and 18) the section of the engine most likely to have produced the signal. This provides a diagnostic aid in determining the section of the engine which is most likely to have a component exhibiting abnormal wear, or other engine event.

Abstract: The waveforms (FIGS. 57-80) of signals derived from electrostatic probes (1, 2, 3) are classified (FIG. 9) in terms of width (FIG. 14), presence or absence of following peaks (FIG. 15), presence of multiple peaks (FIG. 21), frequency content (FIG. 22), and noise content of a portion thereof (FIG. 23) as well as polarity utilizing routines related to the various probes (FIGS. 10-12).

Abstract: The wave shapes of signals derived from electrostatic probes (1, 2, 3) disposed in the gas stream of a gas turbine engine are utilized to correlate the signals (FIGS. 57-59; FIGS. 62-80) with causal engine events, and also to correlate some of such signals (FIGS. 60 and 61) to faults in the diagnostic system, utilizing a special routine (FIG. 44) and also utilizing a routine that can discriminate between fault and engine event (FIG. 45).

Abstract: When the number of signals derived from electrostatic probes (1, 2, 3) disposed in the gas stream of an engine reaches a certain value (M, FIG. 8) an additional, N, number of records are acquired (FIGS. 5 and 8) to provide a classification group of records for classification (FIG. 9) into categories indicative of the engine event likely to have caused the excessive number of signals.

Abstract: Signals provided by probes (1, 2, 3) disposed in the gas stream of a gas turbine engine are classified in accordance with discriminators (Tables 2-9) utilized in various routines (FIGS. 25-56), including some discriminators which are not currently used, but may allow further discrimination of additional signals, when recognized. The categories of waveshapes (FIGS. 57-80) which are classified includes categories (FIGS. 70 and 71) which are readily distinguishable but have not as yet been correlated to engine events, thereby providing a data history base in the event they become correlated and aiding in the discrimination of these signals from other, correlated signals.

Abstract: The wave shapes (FIGS. 57-80) of signals derived from electrostatic probes (1, 2, 3) disposed in the gas stream of a gas turbine engine are classified (FIG. 9) into categories relating to engine and other events, and are further correlated or discriminated by other conditions of the engine. Engine acceleration and the sign thereof (FIG. 4) are utilized to correlate and discriminate acceleration and deceleration (FIG. 81). Power lever angle (68, FIG. 1) is utilized (FIG. 4A) to provide an indication of afterburner being lighted, a flameholder probe (27, FIG. 1) becomes biased (82, 83, 85, FIG. 1) to sense when the afterburner is lit, for correlation with afterburner nozzle liner erosion (FIG. 69, FIG. 81). Chopping the fuel to the afterburner is correlated (FIG. 4A, FIG. 81) with signals indicative of the character of the afterburner chop (FIGS. 77-79).