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| Number | Title | Issue Date |
| 4270781 | Opening and closing apparatus for doors and the like An opening and closing apparatus for doors and the like includes magnets and metal plates which are located superposed inside a casing. Either the magnets or the metal plates are adapted to be slidable inwardly and outwardly of the casing and the other of... | 06/02/1981 |
| 4260180 | Mechanical coupling Apparatus is provided comprising non-magnetic male and female coupling sections having reciprocally mating interrupted screw portions. The male section has a permanent magnet disposed in a first cylindrical chamber in the mating end thereof. The female se... | 04/07/1981 |
| 4257631 | Magnetic emergency exit door lock with delayed opening A magnetic emergency exit door locking system includes a magnetic lock with an armature securred to an emergency exit door and a coil to the lintel of the door. The coil is connected to a power supply and keeps the door locked as long as the power supply ... | 03/24/1981 |
| 4249761 | Locking assembly for doors and the like of a box body A locking assembly for doors and the like having a ring in a predetermined position in a cylindrical body so as to be rotatable in the circumferential direction. Projections are provided on the inner peripheral face of the ring. A sliding rod is fitted in... | 02/10/1981 |
| 4227726 | Door operating equipment A door operating mechanism holds a door in a closed position and automatically opens the door of a console which contains an electric audio apparatus such as a stereo. When the door is first pushed to a close, the door operating mechanism which is inside ... | 10/14/1980 |
| 4223799 | Releasable locking means for closure caps The present invention pertains to releasable locking mechanism for a hollow circular member such as a fill pipe for an oil tank and cup-shaped closure cap of non-magnetic material which is connectable to the hollow circular member, in combination with a l... | 09/23/1980 |
| 4212392 | Medical emergency treatment kit A portable medical kit is provided which maintains medicines, instruments and equipment secure when the kit is closed, presents all of the contained items in a readily visible and easily accessible manner when the kit is open, and provides unambiguous int... | 07/15/1980 |
| 4194494 | Fireplace plug A fireplace plug is provided for closing the metallic throat of a fireplace during periods of nonuse. The plug has a body, for obstructing the throat, which carries a magnetic means for securing the body to the throat. The plug further provides a handle f... | 03/25/1980 |
| 4194771 | Magnetic door stay retainer A magnetic door stay retainer for retaining a swinging door in a closed position in a door frame. The retainer automatically holds the door in a closed position in a door frame when the door is closed. The retainer is adjustable in controlling the amount ... | 03/25/1980 |
| 4168129 | Permanent-magnetically held closure cap for writing instruments A closure cap which is held on writing instruments by a permanent magnet connected to the cap. The permanent magnet is arranged near the closed end of the cap, has a nearly cylindrical cross section, and has pole shoes on its pole faces, the free ends of ... | 09/18/1979 |
| 4155576 | Door keeper A door keeper for double swing doors that retains the doors against partially opening due to wind forces. The keeper includes a permanent magnet that is mountable to a door frame. The magnet includes a flat surface that may be positioned flush with the ad... | 05/22/1979 |
| 4150664 | Spatter screen for stove A removable frame supports a spater-intercepting screen positioned adjacent burners of a cooking stove. Grease particles and the like are trapped by the screen to protect walls and appliances near the stove. The screen is substantially transparent and eas... | 04/24/1979 |
| 4126912 | Closing attachment kit for sliding door and anti-friction support A unitary self-contained kit of components is readily attachable to a sliding door without modification of the door to effect gravity actuated closing. The kit includes a guide channel and pulley that are simply adhesively secured to an outwardly facing s... | 11/28/1978 |
| 4116512 | Drawer latching device A valet rack comprising in combination a plurality of drawers in a body, said drawers having a magnetic means located at the back thereof to cooperate with a magnetic means in the body to provide a positive locking of the drawer in the closed position in ... | 09/26/1978 |
| 4110552 | Electro/mechanical enclosure with magnetic cover means An enclosure to ensure EMI and RFI shielding for electronic components and/or protective shielding for mechanical components is disclosed. The enclosure comprises a housing having a bottom, side walls connected to the bottom in a shielding relationship to... | 08/29/1978 |
| 4099755 | Releasable magnet assembly Several forms of releasable magnet door latches are disclosed. In one embodiment, a pull on a knob mounted in a housing attached to a door is translated by an inclined cam surface into rotary motion of an actuator rod extending into the door. The rod moun... | 07/11/1978 |
| 4090379 | Automobile door latch and lock protecting device and method for preventing freezing of door latches and locks A protecting device for door latches and locks in vehicles exposed to the elements, said device including a flexible magnetic frame for sealing a water repellent frangible sheet of material over the door latch or lock. A method for preventing freezing of door ... | 05/23/1978 |
| 4058335 | Magnetic sheet the magnetic attraction of which is strengthened This invention relates to a means for strengthening the power of the magnetic attraction of a magnetic sheet, having a certain but weak magnetic attraction.... | 11/15/1977 |
| 4049302 | Safety lock mechanism In a safety lock mechanism, including a locking bolt pivotable about a door hinge so as to be able to swing to a door-locking position and an electromagnet provided to retain said bolt in said door-locking position, apparatus arranged, so that upon the in... | 09/20/1977 |
| 4033013 | Flexible magnetic plastic strip closure A closure for a flexible case such as a brief case, purse or the like, wherein opposing flexible magnetic plastic strips border the opening or mouth of the case, the opposing strips being arranged to be of opposite polarity to develop an attraction force ... | 07/05/1977 |
| 4026588 | Push-to-open magnetic catch A push-to-open magnetic catch for cabinet doors and the like has a housing and within the housing is a rectangular magnet mounted at one end of a pivotal lever. The housing is ordinarily so positioned within the cabinet that the forward edge of the magnet... | 05/31/1977 |
| 4021891 | Magnetic lock closure A magnetic lock closure used for a handbag or the like for closure comprising two separate parts at least one of which is formed as a female device in a permanent magnet of a cylindrical or any other shape having a hole or slit centrally thereof and its o... | 05/10/1977 |
| 4010967 | Gasoline tank closure for a motor vehicle A closure for a gasoline tank or radiator of an automobile having a permanent magnet for securing the closure to an adjacent portion of the vehicle upon removal so it will not be lost. The closure also includes a flashing light which is activated upon rem... | 03/08/1977 |
| 3976316 | Magnetic door latch A magnet has a contact face, a registry edge and restraint apertures in which lodge resilient restraints of a magnet holder. The holder has snap fingers and locators for securing the holder to a door stop of a door frame, preferably in an indented section... | 08/24/1976 |
| 3971581 | Variable magnetic lock A variable remote control locking device comprising an electromagnet arranged to contact a ferrous metal plate to lock a door, a variable current supply for controlling the electromagnet, a remote transmitter and a receiver to control the variable current... | 07/27/1976 |
| 3964125 | Electromagnetic door holding device An electromagnetic door holding device for a door closer of the type having a spring operated rotating spindle operatively connected by an arm to a slider mounted for reciprocal movement in a track usually secured to the door frame wherein the slider has ... | 06/22/1976 |
| 3950894 | Reinforced polyester door A reinforced polyester door is disclosed. The door has an interior supporting frame, rigid front and back surface skins, an insulating foam layer between the front and back surface, and a reinforcing member adjacent the latch side of the door. Magnetizabl... | 04/20/1976 |
| 3934909 | Push releasable magnetic latch A push releasable magnetic latch for cupboard doors or the like, comprising a first magnetic member secured to the cupboard door and a second magnetic member swing mounted to the cupboard structure about a pivot axis perpendicular to the path of travel of... | 01/27/1976 |
