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4959637 |
Emergency signaling device
An emergency signaling device adapted to attach to an existing flashlight is disclosed. The device provides audio, optical and radio frequency alarms when the device detects no movement for a...
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4910498 |
Swimming pool safety alarm
An infrared light emitter forms a beam of infrared (IR) light directed onto a set of mirrors or reflecting surfaces arranged to form a closed path about a swimming pool and spaced above the pool...
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4825207 |
Monitoring of fluids
An arrangement for monitoring conditions of a fluid comprising a first station incorporating a detector and transmitter assembly including a plurality of condition sensors, each of which is adapted...
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4818970 |
Fire condition detection and control system for air moving and filtering units
A fire condition detection and control system for use with air moving and filtering units. The system includes one or more remote fire condition detection units, which sense heat or smoke and, upon...
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4797656 |
Appliance paging system
A domestic appliance such as a clothes dryer having a signalling system including a portable radio receiver transportable by the appliance operator to locations remote from the operating cycle of...
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4758826 |
Work area advanced warning system
The work area advanced warning system is for use on the work site to give warning of impending danger in order to give time for workers and others to avoid the danger before the damage. Dangers are...
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4714914 |
Liquid immersion alarm
A liquid immersion alarm is shown having a remote transmitter activated by a water immersion switch to generate an alarm signal. The alarm signal is received by a receiver that activates an alarm....
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4689611 |
Alarm and communication system for water skiers
An alarm and communication system for water skiers as provided for use with a boat having a driver and a ski rope secured at one end to the back of the boat and a handle at the other end of the...
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4665385 |
Hazardous condition monitoring system
Hazardous condition warning indications are transmitted from a site to a remote location on a conventional audio communication link. A variety of hazardous conditions including unconsciousness or...
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4651139 |
Method for monitoring the drift of an anchored vessel and device for implementing the method
The drift of a boat which lies at anchor is monitored by a piezoelectrical accelerometer which is fixed to the anchor and will be subjected to sharp accelerations in case the anchor is pulled over...
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4644328 |
Buoyant alarm device
An improved buoyant alarm device which provides an indication of a disturbance to a quiescent level of a body of water. The device includes a cover assembly and a buoyant body. The cover assembly...
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4612535 |
Add-on alert system
An add-on alarm system for use in conjunction with an audio detector. The system includes an indoor unit that is audibly coupled to the detector and an outdoor unit containing an independent power...
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4603327 |
Garment with fastener alarm
A warning device particularly for use in a coverall worn by a person in a controlled environment warns if the person has unfastened the garment. The garment has fasteners such as a zipper for...
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4598273 |
Leak detection system for roofs
A moisture intrusion detection system is provided, wherein a plurality of independent and insular moisture detecting units are placed in a predetermined spaced apart relationship across the surface...
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4594580 |
Expanded-capacity wireless security system with dual-range environmental monitoring and control
A multiple-RF channel wireless security system has expanded monitoring and control capacity without a concomitant increase in the number of available RF channels. At least one primary...
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4578665 |
Remote controlled surveillance train car
A self-propelled remotely controlled satellite car precedes a train along train tracks. The satellite car is remotely controlled to travel a predetermined distance ahead of the train. The satellite...
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4549169 |
Personal ocean security system
A system for monitoring the security of one or more persons in a waterside environment and for providing a failure proof indication of when such person falls into the water. The system includes a...
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4540976 |
Circuit arrangement for a buoyant alarm device
An improved circuit arrangement is described which is used with a buoyant device for indicating a disturbance to the quiescent level of a body of water. The circuit arrangement includes an encoder...
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4482785 |
Refrigeration monitor system with remote signalling of alarm indications
A refrigeration monitor system for monitoring an unattended freezer installation having a number of freezer compartments containing perishable products. The system comprises a network of...
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4462022 |
Security system with radio frequency coupled remote sensors
A wireless security system in which a sensor for detecting a security violation is provided with a radio frequency transmitter adapted to excite the receiver of a control unit at a different...
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4459584 |
Automatic liquid level indicator and alarm system
An automatic liquid level indicator and alarm system (10) that automatically emits an alarm when liquid in a vessel reaches a preselected low or high level. The system (10) is particularly...
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4369438 |
Sump pump detection and alarm system
A sump pump detection and alarm system, comprising electrical circuits and components to detect the existence of three different conditions, namely (1) a high water condition with electric power...
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4363031 |
Wireless alarm system
A wireless smoke alarm system in which each detector includes a local smoke detector and an alarm. These are coupled to a transmitter and a receiver. The transmitter and receiver are within range...
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4331953 |
Communication system for use in hazardous confined areas
A communications system for use by workers in a confined hazardous working location includes a transmitter that is carried by the worker in the hazardous area. The transmitter is capable of sending...
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4237454 |
System for monitoring bearings and other rotating equipment
A self-powered monitor unit with a tuned mechanical resonator power unit and a radio transmitter is mounted on every piece of rotating equipment being monitored, such as machinery with ball...
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4189720 |
Repeater for smoke and similar alarms
A repeater is provided for a smoke alarm or similar alarm device which picks up the sound from the alarm device and transmits a coded radio signal to a receiver at a remote location. This receiver...
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4189721 |
Personal alarm system
A personal alarm system includes a receiver with a relay; the relay has a pair of contacts which are normally open, and the contacts are closed on receipt of a signal received by the receiver. A...
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4183019 |
Money clip with light sensitive detector
The invention relates to an electronic detection and transmission system known in the art as a money clip. Presently available such money clips are pressure sensitive and transmit initiating...
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4177461 |
Smoke alarm device for a grain dryer
An alarm device for a grain dryer. The alarm device activating an audio alarm and visual alarm energized electrically by a smoke detector and burner shutdown indicator lamp to warn the dryer...
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4168494 |
Livestock confinement structure monitor
A monitor for a plurality of functions associated with a structure such as a livestock confinement structure or the like including detecting fire or intrusion, and monitoring temperature, water...
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4160246 |
Wireless multi-head smoke detector system
A wireless smoke detector apparatus including at least one detector/transmitter unit and a receiver/annunciator unit. The detector/transmitter having a pulsed infrared radiation source, a...
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4153881 |
Early flood warning system
An Early Flood Warning System provides advanced warning of probable flash floods and/or stage floods to potential flood victims by collecting and analyzing rainfall and stream level data, and by...
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4144529 |
Remotely responsive motion detector
A motion detector comprising a self-excited oscillator operating in the megacycle range which is maintained at a substantially fixed frequency by way of a constant current source. By virtue of the...
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4122660 |
Snow alarm
An alarm clock has associated with it an alarm and a snow-sensing means for detecting an accumulation of snow. The clock is provided with means for setting an alarm at two individually presettable...
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4121200 |
Swimming pool alarm system
A swimming pool alarm system for activating an alarm indicator responsive to the presence of a person in a pool being monitored. The system includes a frequency selective detector responsive to...
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4119950 |
Gas detection
Apparatus for monitoring gas content on a site, to provide an indication if an undesirable gas content occurs, comprises a transmitter for feeding ultrasonic waves through the gas to a receiver....
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4074563 |
In-situ measurement apparatus
This is an in-situ telemetry apparatus for the measurement of dynamic moduli, a key design parameter, of the propellant mass of solid fuel rocket engines.
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4058802 |
Contaminating spill detection arrangement
An arrangement for detecting the presence of contaminants, such as an oil spill, in a body of water. At a predetermined location in the body of water there is provided at least one detector station...
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4028688 |
Refrigeration unit air temperature detection alarm system
A compact alarm system is provided by a temperature sensing switch within a refrigeration unit, the temperature of which actuates the switch when temperature rises to a predetermined level. Change...
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4010442 |
Status display for seismometer-group recorder operations
Seismometer group recorders amplify and make reproducible recordings of one or more seismometers employed in geophysical prospecting. There is no recording of the various groups at the controller...
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3984803 |
Seismic intrusion detector system
A system for monitoring man-associated seismic movements within a control area including a geophone for generating an electrical signal in response to seismic movement, a bandpass amplifier and...
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3971006 |
Multi directional motion and vibration triggering device
A motion detector and unique switch forming a part thereof in which the switch includes a glass housing with a spherically shaped, concave surface in which a pool of mercury rests and a pair of...
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3967258 |
Alarm system
A system for detecting intruders in a building, using sets of light emitters and detectors. Interruption of a beam between an emitter and a detector produces a radio signal picked up by a control...
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3956742 |
Mooring load sensor
An offshore mooring terminal or buoy is provided with apparatus for indicating to a ship moored thereto that the stresses on the mooring equipment of the buoy reached a dangerous level and the ship...
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3953843 |
Swimming pool alarm
An alarm system includes a floating transmitter which when activated by a wave will generate one short signal and then turn itself off. A radio receiver will detect and verify the time duration of...
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3952294 |
Smoke detection alarm system
An emergency alarm system for detecting smoke in remote areas and for transmitting an indication of detected smoke, either via communications channels already within a facility being protected or...
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3944996 |
Telemetry alarm system
A telemetry system adapted to monitor earth slope stability comprises a minimum of one earth slope stability sensor connected with timing means, which, upon the sensing of slope instability,...
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3922716 |
Air traffic controller aid
A system for assisting air traffic controllers is disclosed. The system of this invention converts data obtained by sensing devices into a spoken number or statement. This conversion is...
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3918034 |
Oil detection and signaling system
A detector unit and system for detecting and signaling the presence of an oil slick on the body of water. An oil sensing assembly consists of a hydrophobic, oleophilic oil sensing material secured...
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3826128 |
SURFACE DEFORMATION INDICATING APPARATUS
An apparatus to indicate deformation of a surface such as the interior of a mine, to which it is attached. An anchor bolt assembly with one electrical contact is rigidly fixed into the surface. A...
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