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4975687 Hall effect signalling gauge  
A signalling gauge may utilize a non-captivating, magnetically actuated switch element which is mounted in an influence zone of a path of a magnet carried by an indicating pointer of the gauge....
4965416 Acceleration and deceleration sensor  
An acceleration and deceleration sensor includes a housing; first and second elongate cavities formed in the housing and extending parallel to one another; a reed switch disposed in the first...
4959628 Rotating electric switch actuated by fixed magnetic means, usable for a surface cleaning device  
A rotary electrical switch is provide for a portable power operated surface treating device having a fixed handle assembly, a hollow generally cylindrical roller supported for rotation on and...
4933655 Mounting structure of a reed switch for an eddy-current indicator  
Disclosed herein is a mounting structure of a reed switch in an eddy-current-type indicator which can realize to lessen an operation vibration sound of the reed switch. The mounting structure...
4912406 Device for determining position of a railway vehicle by measuring deviation in position of a magnet  
Apparatus including a magnet (10) having at least one degree of freedom w respect to a first member, tangent to the direction of measurement and cooperating with a magnetic portion associated with...
4910634 Interlock switch  
An interlock switch for the service door of a computer. The switch prevents power from being automatically resupplied to the computer if the door is opened while power has been interrupted, even...
4903010 Intrusion detection switch housing  
A threadably installable intrusion detection unit. The unit has a generally cylindrical housing with an exterior threaded surface and an end portion formed to receive a screw driver. An operative...
4898079 Electric or electronic position sensor device  
The electric and/or electrical sensor or detector device is intended to cooperate with a movable element surrounded by a shell, it comprises an annular clamping collar adapted to be clamped in...
4894499 Electric push-button switch  
The electric push-button switch comprises a housing portion and a linearly moveable push-button portion. Guide columns at the housing portion and the push-button portion attain accurate linear...
4888580 Child protector  
A device is presented which warns parents that their children are being abducted by sounding an alarm. The alarm is wired to a battery and a magnetic switch comprised of two magnets. When the two...
4877927 Extended dwell shock sensing device  
An extended dwell shock sensing device (10) is constructed to operate in two stages. A carriage (34) that includes a magnet (40) is slidably mounted between a first abutment (20) and a second...
4873401 Electromagnetic damped inertia sensor  
A sensor comprising: an inertial mass movable from a first position to a second position in response to a acceleration (deceleration) signal of predetermined amplitude and duration; electrical...
4866426 Magnetic amplifier housing and detector for an improved tamper alarm system  
A magnetic amplifier housing uses a base, dowel and shunt to magnetizable terial to concentrate the magnetic field of a ring magnet through a Hall Effect transistor to provide an improved detector...
4864087 Burglar alarm including a reed relay actuated in response to a vibrating magnet to produce an alarm signal  
The present disclosure is directed to an improved burglar alarm which is mounted on a base having a concaved space for receiving therein a ring-like magnet with an elongated resilient arm,...
4837539 Magnetic sensing proximity detector  
The improved magnetic proximity detector includes a tubular housing, a tubular magnet fixed in position within the housing, a first movable magnet within the housing at one end of the tubular...
4837537 Reed switch device  
A reed switch device comprises a pair of magnets such as bar magnets or ring-shaped magnets which are arranged in inverted polar orientations such that they produce magnetic fields acting in...
4831350 Rotary shaft position reed switch  
A switch for providing signals indicating the position of a rotary shaft has an enclosed switch chamber. Within the chamber is at least one magnetically actuated switch device. A switch actuating...
4825181 Switching device  
A switching device comprising a reed switch of a normal open type turned on and off by a magnetic field, a fixed bias magnet located in an area where the switch operates stably, and a starting...
4820888 Tilt switch replacing mercury switches  
A tilt switch encapsulated by epoxy resin in a polyvinyl chloride housing for high strength is provided. Actuation of the tilt switch is effected when moved through an arc of 45° or less.
4800241 Proximity switch mounting plate  
The mounting plate for a proximity switch for sensing the position of a piston within a fluid operated, expansible chamber cylinder. The mounting plate comprises a flat portion with two notches...
4792651 Pressure differential bypass sensor switch with magnetic thermal lockout  
A pressure differential bypass sensor switch with thermal lockout that utilizes change in position of a permanent magnet carried by a reciprocable piston responsive to pressure differential in a...
4788534 Wind alarm sensor  
A frame member having two side walls and two end walls surround a cavity, and a cylindrical member is supported for pivoting in the cavity of the frame member. A magnet is mounted on a side of the...
4788517 Sealed proximity switch assembly  
A sealed proximity switch assembly comprising a housing of non-magnetic material, contacts mounted in the housing, a movable contact member of electrically conductive material mounted within the...
4787072 Structure of electronic watch  
In an electronic watch, a sensor of the closed type which consists of an upper circular cover (10), a shell (20), a rotary turning disk (30), clamped between the upper cover and shell, the shell...
4758697 Intermittent supply control device for electric appliances of in particular a hotel room  
A device for controlling the selective switching on and off of the supply of current to an electric appliance of a premises, particularly a hotel room, includes a door lock having a bolt and a...
4752657 Proximity switch mounting apparatus  
A mounting apparatus for a proximity switch for sensing the position of a piston within a fluid operated, expandable chamber cylinder. The mounting device comprises a block shaped member with at...
4752756 Electrical system with at least one electric load unit being disconnectably arranged on a surface  
The invention relates to an electrical system with at least one electric load unit (E) magnetically attached to a surface (F) being provided with path conductors (L). The load unit (E) comprises...
4745383 Magnetic proximity switch  
A magnetically operated proximity device is provided with a pivotal armature formed as a hat in cross section with two L-shaped members, one being longer and greater in mass than the other. The...
4739135 Attitude insensitive automatic reset flow sensor  
Disclosed is a non-position sensitive, non-memory condition sensitive, automatic reset flow sensor having a solid housing having an inlet port and an outlet port connected by an axial bore through...
4737751 Robbery alarm switch  
Robbery alarm switch having two independently manually engageable plungers that must be substantially simultaneously moved by a cashiering accostee to actuate a summoning alarm. The robbery alarm...
4734832 Spotlight with interchangeable handle  
A hand held spotlight includes a sealed beam enclosure together with one or more detachable handles. The detachable handles each include a latching mechanism capable of translating a magnet...
4728928 Call switch for wet areas  
Call switch for use by hospital patients and staff members to summon aid in wet areas such as shower and bath areas. An actuating magnet is positioned on the front side of a waterproof panel for...
4713889 Illuminated gunsight  
This invention comprises an illuminated gunsight attachment for mounting on a weapon to permit the user to aim and shoot in low-light conditions. The illuminated gunsight includes a light-emitting...
4705922 Relay for the operation of a belt tightener or tensioner for automobile safety belts  
A relay for the operation of a belt tightener or tensioner for automobile safety belts in the event of a collision with an obstacle. The relay consists of a conduit or dry-reed contact arrangement...
4700163 Removable magnetic switch security system for buildings  
A security system for a home to actuate a signal upon the opening of a movable closure member (12) mounted within a fixed framing member (14). The security system includes a switch assembly (20)...
4680436 Proximity switch in mounting arrangement  
A contactless proximity switch and mounting arrangement for determining the position of a movable member within a cylinder which has two end covers secured on the cylinder by means of a plurality...
4645151 Cable and connection apparatus for electrostatic powder guns  
An improved control cable terminal for an electrostatic spraying gun includes a magnetically operated reed switch and an insulating body encapsulating both the switch and control wires at the gun...
4646042 Speed and distance sensor  
A speed and distance sensor comprises a circular magnet supported on a shaft journaled on a housing. The magnet is polarized at regular circumferential intervals and is accurately axially located...
4638276 Reed switch with a housing and a pulse generator  
A reed switch includes a housing in which extends a stepped bore for slidably receiving a magnet carrying sleeve. The sleeve includes a longitudinal bore which receives a glass tube. The sleeve is...
4638278 Magnetic detector apparatus  
A location detecting apparatus for use with a fluid conducting conduit in which a movable member moves includes an internally mounted magnet attached to the movable member and an external portion...
4620173 Latching magnetic actuator  
A magnetically driven and latched actuator includes an armature, at least a part of which is of a ferromagnetic material, mounted for reciprocating travel between two spaced apart limit positions....
4620184 Sensing arrangement on a material roll  
Sensing arrangements on material rolls are used to give advance warning when the material web forming the roll approaches its end. Usually this involves the sensing of the reduction of the the...
4616285 Safety and selective use switch for a power outlet  
A magnetically operated switch wired in series between a source of electrical current and an electrical appliance. In one embodiment the switch is used in conjunction with a convenience wall...
4611201 Magnetically actuated illuminating warning device for circuit breakers  
A magnetically actuated illuminating warning device for conventional circuit breakers of the type that have a switch assembly with three possible positions for its switch lever. A battery powered...
4611105 Device for the measurement of through-flow with potential-free end contact switch  
A device, disposed in a tube line, for the through-flow measurement of gases or liquids according to the float element principle with a float element (4) which is disposed in a narrow measuring...
4596971 Magnetic circuit device  
A magnetic circuit device suitable for use in a magnetic catch having a switching function, a slide switch or a sensor for detecting locations of a movable member has been found. The magnetic...
4595897 Speed sensor device  
A magnetic sensing device which includes a reed switch installed in a housing of synthetic resin and electrically connected with an automobile body. The device further includes a metal plate...
H000043 Magnetic latch closure control  
In a copier with a copying platen, and platen cover unit pivotal thereover, which may comprise a document feeder, the platen cover unit having connecting pivotal lifting means, and a magnetic...
4544903 Electrical connector system  
An electrical connector system includes two cooperating connector components, each of which includes a housing of electrically insulating material and a support body mounted for movement within...
4543458 Switch and connector assembly including protective housings for jumper cable  
A connector assembly for effecting mechanical and electrical connection between a portion of a security alarm or similar circuit mounted on a swinging door or window and a portion of such a...