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3946173 Acceleration/deceleration actuating mechanism for wrist instruments  
Terminals within a digital wristwatch which normally require closure by pressing a button on the side of the watch in order to render visible the display are arranged to be automatically closed by...
3945139 Advertising device  
An advertising device is provided which includes a base and a display piece. The base has a display piece supporting surface and a magnet concealed beneath the surface. The display piece, which is...
3940578 Keyboard structure having panel mounted key actuators with electrical component operating element  
An electronic keyboard has a chassis with keys each utilising a parallel motion linkage to permit movement of an operating member towards an electric circuit element. The main structure of the...
3932718 Intrusion detector  
An intrusion detector comprises a housing attachable to a fixed support, an electrical switch fixed within the housing and having a switch actuator movable within a longitudinal bore in the...
3924086 Pressure responsive magnetic switch  
A housing supports a magnetically operated contact unit and a permanent magnet switch operator, such as a tubular cylinder containing a fluid pressure responsive magnetic piston.
3915340 Indicator for a dispensing device  
An indicating mechanism for a dispenser in a copier machine. The dispensing mechanism comprises a container designed to store and dispense a quantity of developer of the kind having a toner...
3916360 Magnetic keyboard  
A magnetic keyboard assembly including a key stem magnetically held in an unactuated position by the attraction of a magnet to a metallic mounting board and adapted to be reciprocated between an...
3913083 Control system for aircraft refueling facilities  
A petroleum-oil-lubricant hydrant facility control system which utilizes reed proximity switches and magnets as a replacement for unreliable cables, sockets, plugs and switches of currently...
3906934 Pressure sensor-timer alarm for pressure sensitive devices  
A pressure sensor-timer alarm for pressure sensitive devices, e.g., mechanical breathing devices, having a pressure sensor, e.g., diaphragm which is sensitive to pressure changes in the pressure...
3906417 Push-button with multiple electroconductive contacts returned to rest position by a magnetic device  
A push-button movable in a casing between two positions corresponding to two switching states of an electric circuit, the casing comprising an insulating plate provided with contact means, some of...
3896404 Magnetic switch hinge  
A hinge has two leaves held together with a hinge pin and each leaf is provided with a recess opening out of the back face thereof. A magnet is completely contained within the recess on the one...
3890476 Appliance cabinet with actuated door switch  
An appliance cabinet switch assembly including a door-mounted magnetic actuator and a cabinet-mounted door switch to accommodate variation in the closed position of the door relative to the...
3887098 Material handling apparatus  
A material handling vehicle having a bucket which is movable between dig, carry and dump orientations is provided with an improved apparatus for controlling operation of a motor which moves the...
3881116 Motor control system and electrical switch constructions therefor or the like  
A control system for a motor having a required oil pressure for the safe operation thereof, the system having a time delay switch for interconnecting an electrical source to the motor to operate...
3879602 Keyboard  
A keyboard including a plurality of keys, each arranged to engage and move a member, both resiliently and magnetically restrained, from a non-operative to an operative position to introduce input...
3873787 AIR-PRESSURE SWITCH DEVICE FOR PNEUMATIC TIRES  
An alarm device capable of detecting reduction in vehicular tire air pressure below a critical level irrespective of the vehicle speed, notwithstanding that the critical pressure level is variable...
3873957 PUSH BUTTON  
A pushbutton switch producing a snap-action pulse from a Hall element. A snap magnet is held in a rest position and then released to follow the movement of a control magnet thereby applying a...
3859612 SWITCHING DEVICE  
A switching device includes a plurality of fixed contacts supported on a print board having an annular guide opening and arranged along the annular opening; a plurality of movable contacts formed...
3858145 MAGNETIC CIRCUIT DEVICE FOR A CONTACTLESS SWITCH OR THE LIKE  
A magnetic circuit comprises a cylindrical disk permanent magnet having oppositely polarized end surfaces and a keeper of soft magnetic material. The permanent magnet has an axial aperture which...
3852692 MAGNETICALLY OPERATING SWITCH  
A moisture and tamper proof lid switch on a clothes washer top is magnetically operated by a magnet carried on the swinging edge of the washer access lid. The switch has one pair of stationary...
3829803 SEATING DETECTING DEVICE  
A seating detecting device comprising a pressure receiving member of synthetic resin, a bracket of synthetic resin, a permanent magnet mounted in the pressure receiving member, and a magnetically...
3828910 CODING KEYBOARD  
Coding keyboard for a teleprinter. It comprises a central plate, a lower plate which is a printed circuit panel and an upper plate forming a cover, these three plates being parallel to one...
3824512 MAGNETIC SELF-LATCHING PRESSURE SWITCH  
A pressure-operated switch is provided that will maintain closure indefinitely until it is reset electrically. A permanent magnet is positioned close to a reed relay switch in response to a shock...
3823328 LIQUID LEVEL CONTROL SYSTEM AND SWITCH ASSEMBLY THEREFOR  
A liquid level control system which includes a reed switch actuating assembly having a magnet movable in response to a change in liquid level to effect opening and closing of reed switch contact...
3816679 MAGNETICALLY OPERATED ELECTRICAL CONNECTOR  
An electrical connector having mating frusto-conical plug and socket members with electrical conducting rings and contact members providing full swivel contact and a magnetically operated circuit...
3813596 MAGNETIC REED SENSOR SUITABLE FOR USE IN IGNITION TIMING SYSTEMS  
A magnetic reed sensor comprises a generally U-shaped permanent magnet having first and second end poles defining a gap of a given distance therebetween and establishing a magnetic flux path...
3806852 SWITCH ACTIVATING HINGE  
A switch activating hinge comprises a pair of adjacent, pivotally connected hinge leaves, a magnet mounted on one hinge leaf and a switch responsive to the magnet mounted on the other hinge leaf....
3806851 ELECTRIC SWITCH FOR A RADIAL READOUT GAUGE  
An electric switch mounted as an attachment to a radial readout gauge, including a permanent magnet carried by or forming a part of the gauge pointer and which is movable over a graduated scale of...
3801767 PULL-APART SAFETY SWITCH WITH MAGNETIC MEANS FOR MACHINES  
Several embodiments of pull-apart safety switches are disclosed that are for use in connection with machines from which the operator may be thrown or which he may leave with the machine remaining...
3800254 TAPERED SHUNT REED SWITCH  
A switching device for sensing the position of a displaceable member including a reed switch assembly having a magnet and a pair of contacts within the normal magnetic field of the magnet, the...
3800249 SWITCH CONSTRUCTION  
The embodiment of the invention disclosed herein is directed to a switch construction which includes a base member which has a pair of slide surfaces. A cam surface formed as an integral part of...
3790912 FLASHLIGHT AND SWITCH ASSEMBLY  
An improved flashlight construction which substantially reduces the possibility of arcing, having a glass enclosed magnetic reed switch electrically connected to the conductor strips along the...
3786391 MAGNETIC SELF-ALIGNING ELECTRICAL CONNECTOR  
A magnetic self-aligning electrical connector comprising a pair of connector or coupling havles each having electrical contact means therein and one of said coupling halves having magnetic means...
3778737 MAGNETIC CHIP SWITCH  
A switch box is provided with a magnetically attractive face plate formed with two or more spaced indents. Within the box and adjacent only one of the indents is a magnetically responsive switch....
3778808 ELECTRONIC WEIGHT MONITOR  
The electronic weight monitor of this invention comprises a control assembly including a switch operable to selectively control electric power to the weight monitor, a relay connected to an input...
3777255 POSITION SENSOR UTILIZING A PRIMARY AND SECONDARY SHIELDED FROM ONE ANOTHER BY A FERROMAGNETIC SHIELD AND A MAGNET WHOSE POSITION RELATIVE TO THE SHIELD CHANGES THE SHIELDING  
A position sensitive system including an exciting winding, a sensing winding, a ferromagnetic shield therebetween, and a magnet, the shield and the magnet being relatively movable. The magnetic...
3770919 MAGNETIC BUCKLE SWITCH  
Switch in seat belt buckle which operates upon insertion of tongue of buckle and operates under magnetic force when tongue is not inserted in buckle to give signal indication or interlock with...
3760312 MAGNETICALLY ACTUATED REED SWITCH ASSEMBLY  
A magnetically actuated reed switch assembly comprising contact means including first and second cooperating magnetically actuated reeds in spaced relation to each other, a permanent magnet...
3758262 PORTABLE GAS LIGHTER WITH MAGNETICALLY OPERATED LID  
The lid of a smoker's lighter is retained normally closed by means of a magnet. The lid is spring biassed towards an open position and the magnet acts directly against the lid which is of a...
3758721 COIN SWITCH APPARATUS  
Coin switch apparatus having a coin channel through which at least two coins of a common denomination must pass to permit initiation of a function, for example telephone dialling, where normally...
3749982 WEATHERTIGHT, VANDAL RESISTANT PROTECTIVE ENCLOSURE FOR HOUSING CIRCUIT APPARATUS IN AN OTHERWISE EXPOSED LOCATION  
A self-contained, weathertight, easy access, vandal resistant, protective enclosure for housing electrical/electronic apparatus in an otherwise exposed location to serve as a motorist's roadside...
3750077 CONTACTLESS SWITCHING APPARATUS  
A contactless switching apparatus which is adapted to provide a switching output with variation of the magnetic flux being applied to a magnetro-resistance effect device provided in the closed...
3748415 ACCELERATION RESPONSIVE SWITCH WITH MAGNETIC ACTUATOR MEANS  
An acceleration responsive switching device which comprises a substantially generally cylindrical casing having formed a limited space over its upper peripheral surface and a substantially...
3743982 CIRCUIT PROTECTOR  
A circuit protector comprises a permanent magnet secured centrally within a casing and holding as attracted to both N- and S- poles on one surface thereof a movable body of magnetic and...
3742160 GAS CIRCULATING AND TIMER MEANS WITH MAGNETIC COUPLING DRIVE MEANS FOR CAM ACTUATED SWITCHES  
A shaft extends through a motor. A fan is carried on one end of the shaft and on the other end a magnet. A rotor is spaced from and in axial alignment with the magnet. A second magnet is carried...
3738116 COMPRESSOR UNLOADER INDICATOR AND REFRIGERATION SYSTEM CONTROLLED THEREBY  
A fluid motor operates a reciprocating slide valve for unloading a screw type compressor. The reciprocating valve has a rod extending therefrom exterior of the motor housing which reciprocates...
3739117 MAGNETIC SWITCH FOR GAME BOARDS WITH MOVABLE MAGNET CONTACT  
The magnetic switch comprises a plastic enclosure located beneath the playing surface of a game board. A sheet or strip of copper foil is secured to the underside of the top wall of the enclosure...
3737599 ACCELERATION SWITCH WITH MAGNETIC PERMEABLE METAL SLEEVE FOR SHUNTING MAGNETIC FIELD  
An acceleration switch utilizes a permanent magnet with a pole enclosing a magnetically permeable shield and a magnetically permeable ball. The field of the magnet is normally shunted by the...
3736396 MINIMUM FRICTION CONTACTORS  
A device having a flexible ribbon member with conductive portions, selectively bulged or urged into contact with an adjacent cooperating unit having conductive portions. The location of the...
3736397 KEYBOARD SWITCH ASSEMBLY WITH PUSHBUTTON MAGNETIC LATCHING STRUCTURE FOR NON-OPERATIVE POSITION  
A keyboard comprising a plurality of key assemblies mounted in a mounting member and a base member. Each key assembly is provided with a magnet which provides both a magnetic latching and an...