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A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
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| Number | Title | Issue Date |
| 4235571 | Cooling equipment Cooling equipment is disclosed as having an axial flow fan whose blades are restrained from excessive bending in an axial direction.... | 11/25/1980 |
| 4231707 | Fluid supplying device A fluid supplying device having a peristaltic pump with a depression and delivery system that includes an elastic tube (17) for receiving fluid and an assembly of depressing members (15) for alternately constricting and relaxing the elastic tube. A drive ... | 11/04/1980 |
| 4227862 | Solid state compressor control system A solid state system for controlling a compressor or pump which is driven by a motor, the compressor being loaded or unloaded manually or automatically and proportionally to maintain a selected suction-pressure setpoint and to maintain the load on the dri... | 10/14/1980 |
| 4226267 | Vending machine with self contained water supply A vending machine such as a coffee vending machine has a hot water tank connected to the outlet side of a pump. The inlet side of the pump is selectively connected to one of a plurality of water storage containers by way of a valve. Water for the hot wate... | 10/07/1980 |
| 4220440 | Automatic load seeking control for a pumpjack motor Method and apparatus for matching the power output of a high slip motor to the demand requirement of a pumpjack unit. The stators of the high slip motor are automatically connected in various different configurations to provide the optimum torque as requi... | 09/02/1980 |
| 4212589 | Device for producing an artificial blood circulation A pump has a tubular membrane (14) deformed cylindrically by fluid driving pressure to produce an artificial blood circulation. The pump has a feeler (42) which follows the deformation of membrane (14) and operates a switch (102) to close the circuit of a... | 07/15/1980 |
| 4211517 | Detergent supply control for automatic dishwasher A commercial-type automatic dishwasher includes a motor-driven circulating pump for recirculating a washing solution, a motor-driven detergent supply pump for adding detergent to the washing solution, and a control system, including control means for oper... | 07/08/1980 |
| 4207030 | Apparatus for controlling liquid level in a reservoir A balance beam adjustable for a desired liquid level in a reservoir is under the control of a device responsive to pressure head in a main leading from, and reflecting the liquid level in, the reservoir, the beam being in charge of a pump control for one ... | 06/10/1980 |
| 4207031 | Dual speed rotary vane pump A dual speed mechanical rotary vacuum pump wherein a mechanical rotary vacuum pump is directly connected to a two speed electrical motor which drives the pump and the speed of the motor is controlled by an electrical control circuit which selectively caus... | 06/10/1980 |
| 4201518 | Recirculating fluid pump control system A recirculating hot water system includes a hot water supply pipe and a hot water return pipe connected in a loop between a hot water outlet of a hot water tank and a return inlet to that tank. An electrically controlled recirculating pump is placed in th... | 05/06/1980 |
| 4201517 | Automatic control selector for a compressor system An automatic control selector responds to demand conditions to select the proper control mode for a compressor system that includes a compressor operable in a plurality of control modes for alternately controlling the compressor according to the demand co... | 05/06/1980 |
| 4189091 | Furnace having a normally closed blower relay A furnace having a burner fired heat exchanger with a flue gas passage and a heated air passage, a blower powered by an electric motor for circulating the heated air and an electric control circuit with a normally closed relay connecting the blower motor ... | 02/19/1980 |
| 4180374 | Well pump protection system Disclosed herein is a protection system for a well pump in which a normal pressure switch is provided in series between this switch and the submerged motor and pump with a low pressure switch which has connected in parallel thereto a timing device which c... | 12/25/1979 |
| 4179242 | Method and apparatus for liquid supply A method and an apparatus for liquid supply use a pressure tank and a plurality of pumps. When the pressure or liquid quantity in the pressure tank has decreased below a predetermined level, a preceding or regular pump starts. When the demand is too large... | 12/18/1979 |
| 4171932 | Liquid level sensor, pump system means and circuit means A plurality of probes are situated as to experience being touched by the liquid being monitored; when at least one of such probes is touched by the liquid related electrical circuit means becomes energized as to cause related pumping means to be activated... | 10/23/1979 |
| 4171185 | Sonic pump off detector Pump off conditions of an oil well are determined by listening to the sonic clicks of the traveling valve and bottom hole valve. If the clicks do not occur within a certain period after top dead center for successive pump cycles, the well is assumed to be... | 10/16/1979 |
| 4149827 | Method and apparatus for controlling operation of a compressor A method in which automatic selection of the mode of operation for a compressor unit is achieved and is dependent on the conditions under which the compressor unit is operated. Depending on the existing compressed air demand and the time sequence thereof,... | 04/17/1979 |
| 4142515 | Timed water recirculation system Apparatus for effecting a timed recirculation of the hot water in a water distribution network such as for an apartment complex. A recirculating pump is responsive to a drop in pressure in the hot water output line of a water heater and provides recircula... | 03/06/1979 |
| 4135860 | Method and device for controlling the pressure of a working medium delivered by a compressor Method and apparatus for controlling the operation of a motor driven compressor which is automatically unloaded when the receiver pressure reaches a predetermined maximum level and loaded when the receiver pressure reaches a predetermined minimum level by... | 01/23/1979 |
| 4130382 | Control system for irrigation pumps A rain activated control system which shuts off an irrigation pump when a predetermined amount of rainfall occurs. A receptacle for catching rain is mounted in a manner to provide adjustment of the distance between its bottom and a pair of electrodes whic... | 12/19/1978 |
| 4129140 | Automatic flushing device An automatic flushing device for an evaporative cooling system contains a water sump, circulating pump, and float-operated water makeup source. A small, adjustable portion of the return flow enters a separate timing reservoir. When the timing reservoir is... | 12/12/1978 |
| 4118148 | Downhole well pump control system Operation of a downhole reciprocating oil well pump is controlled by displacement of the fluids discharged from the pump into a displacement cell closed at its upper end. Gas is trapped in the upper end of the displacement cell. Fluids flow from the lower... | 10/03/1978 |
| 4095920 | Pump control A pump control for a pipeline milking system in which milk collects in a receiver and is pumped out periodically. The control has a liquid level sensing circuit connected with an electrode in the receiver. The sensing circuit includes a transistor amplifi... | 06/20/1978 |
| 4086035 | Bailer pumps for oil wells A bailer pump designed for securing to a well head comprising an elongated stan pipe projecting upward from the well head supporting a motor driving a reel for cable through a drive train incorporating a magnetic brake, when the current to the motor is in... | 04/25/1978 |
| 4062274 | Exhaust system for bone cement An exhaust system for evacuating the toxic fumes produced when mixing bone cement in a surgical operating room. A fan unit located within a vacuum plenum draws fume-laden air from a hood under which the bone cement is mixed, and exhausts the fume-laden ai... | 12/13/1977 |
| 4047844 | Blood pumping system A blood pumping system has a pair of integral flexible bodies each provided with an inlet and an outlet and disposed in open top cavities in a housing. The cavities have extensions holding inlet valves and outlet valves for opening and closing the inlets ... | 09/13/1977 |
| 4021152 | Electromagnetic pump An electromagnetic pump of the reciprocating type comprising a relief valve mechanism adapted to minimize the magnitude of pulsations of the fluid delivered by the pump and at the same time to act as a pressure accumulator. The relief valve mechanism comp... | 05/03/1977 |
| 3998568 | Pump-off control responsive to time changes between rod string load A pump-off control unit for use in conjunction with a motor driven pumpjack assembly which is connected to reciprocate a downhole production pump. A current transformer connected to the pumpjack motor compares the time interval of a no-load portion of the... | 12/21/1976 |
| 3994628 | Multiple recirculating toilet A pumping system for a plurality of recirculating toilets sharing a common tank is described. A variable volume pump has a by-pass valve which is controlled by a pressure sensor in the flush line, to prevent excessive fluid pressure at the toilets. For ap... | 11/30/1976 |
| 3989913 | Intravenous feeding pump timer The present invention relates to a timing device for an intravenous feeding pump, whereby the pump can be set to operate at its regular rate for a predetermined period (preferably up to about 4 hours) and thereafter at a reduced rate just sufficient to ke... | 11/02/1976 |
| 3981618 | Method and apparatus for preventing pump cavitation The speed of an engine driven pump is sensed and compared with the desired maximum operating speed to detect overspeed. The discharge of the pump is controlled by a variable flow rate controller. When an overspeed condition exists, a command signal is sen... | 09/21/1976 |
| 3972648 | Well controller and monitor A controller and monitor for a fluid producing well is disclosed which operates on the principle that a transducable signal from a positive displacement meter is utilized to continually reset a time delay device which provides for continuing operation of ... | 08/03/1976 |
| 3970413 | Fluid distribution apparatus and method Systems for delivering fluid at substantially constant pressure to consuming loads which exhibit widely varying demands. The systems employ parallel connected booster pumps which may be operated in either of two rotational directions to provide two output... | 07/20/1976 |
| 3966358 | Pump assembly A pump assembly is disclosed which includes a pump which is externally controlled to vary with time the volume and/or the pressure of fluid pumped therethrough. A memory unit is programmed to provide a desired volume-time and/or pressure-time characterist... | 06/29/1976 |
| 3963375 | Time delayed shut-down circuit for recirculation pump A circuit is provided for shutting off the motor of an intermittently activated, electrically powered fluid recirculation pump to prevent the pump motor from burning out its windings or bearings. A power control relay is energized to activate the pump mot... | 06/15/1976 |
| 3963374 | Well pump control A pump control comprising a control circuit having a timer which periodically closes the control circuit and hence an energizing electric circuit to an electric motor driving the pump, for predetermined intervals of time, and a float assembly having a ver... | 06/15/1976 |
| 3957395 | Method and apparatus for controlling a pump A safety control system for a pump and anti-surge valve protects the pump, the valve and the hydraulic main line system. The valve is controlled by a pressure responsive circuit and, via a limit switch on the valve, controls both the steady state running ... | 05/18/1976 |
| 3938909 | Single needle alternating flow blood pump system A blood pump system, typically employed in dialysis, includes a blood pump for withdrawing blood via a single hypodermic needle and valve means operated in synchronism therewith for returning treated blood via the same hypodermic needle. The operation of ... | 02/17/1976 |
| 3938910 | Oil well pumpoff control system Various functions of a production oil well are monitored to cause a switch closure for each normal cycle of the pump. Alternatively, the level of the fluid within the well is monitored to cause the switch closure. The switch closure activates a first osci... | 02/17/1976 |
| 3936231 | Oil well pumpoff control system A sensor associated with the production of an oil well generates a signal indicative of pumpable fluid available in the wellbore. The signal activates a first oscillator whose count is compared with a variable frequency oscillator having a frequency of ap... | 02/03/1976 |
