Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 3961585 | Cargo net A net of the type having a plurality of intersecting straps forming a lattice structure which is adapted to encompass a load to maintain the load on a support or a pallet. The net comprises a top section having diagonally extending interconnecting straps ... | 06/08/1976 |
| 3959704 | Solid state motor starter and overload protector circuit A three-phase A.C. motor is connected to a three-phase A.C. supply through three sets of oppositely poled SCR's, one set being connected in each phase. Triggering pulses are supplied to the gates of the SCR's by triggering circuits. During starting of the... | 05/25/1976 |
| 3959237 | Sustained release polymers A copolymer derived from a monomeric mixture comprising from 20 to 60 parts of acrylic or methacrylic acid, from 20 to 70 parts of a lower alkyl acrylate or methacrylate, and from 5 to 20 parts of a plasticizing monomer is at least partially neutralized b... | 05/25/1976 |
| 3959066 | Apparatus for manufacturing the body portion of a collapsible squeeze tube Three-ply web material is rolled approximately 360° into the form of a cylinder within a preform cavity. A feed roller at the opening rotates continuously and a spring loaded pressure plate has an edge at the opening which forces the web material against... | 05/25/1976 |
| 3958693 | Vacuum X-ray envelope An opaque vinyl envelope having facing polished inner surfaces and an open edge into which an intensifier screen and X-ray film are inserted. The other three edges are completely sealed except for a valve at one edge. Reinforcing strips are attached along... | 05/25/1976 |
| 3957740 | Copolymers Copolymers comprising acrylic or methacrylic acid and methyl methacrylate are neutralized by the addition of cyclic alkylene imines, preferably ethylene imine, to form a product which is capable of absorbing large amounts of material soluble in water, and... | 05/18/1976 |
| 3955246 | Separable fastener A separable fastener is disclosed which has the form of a tape having a plurality of laterally adjacent uniformly corrugated strips. Adjoining strips are staggered relative to one another so that the ridges of one strip are laterally aligned with the depr... | 05/11/1976 |
| 3955956 | Process for producing glass articles A process for producing glass articles, particularly glass containers, comprises heating glass raw materials in a first location until the glass has been refined to approximately 60 to 95% of complete refining, cooling the molten batch and converting the ... | 05/11/1976 |
| 3955311 | Mechanism for moving an upper appendage of a toy figure A push button in the upper side of the torso of a toy figure is hand operated. By pushing the button this motion is transmitted to a lever which is rotated upwardly. The upward motion of the lever is translated into a rotary motion of a ball joint which i... | 05/11/1976 |
| 3953991 | Lock construction A radio-operated lock construction is adapted to be mounted on a door and is positioned to engage a mating piece mounted on the adjacent door jamb to lock the door in the closed position. The lock comprises a lock housing having means for mounting the hou... | 05/04/1976 |
| 3955020 | Glass container with plastic wrapper A glass container, particularly a bottle, is wrapped in a plastic laminate which is held to the glass by an adhesive. The plastic laminate protects the surface of the bottle from abrasive forces which would diminish the strength of the glass, in combinati... | 05/04/1976 |
| 3947336 | Halogenation of heterocyclic compounds A process is described for making thiophens and furans substituted by bromo aliphatic or alaromatic groups by brominating the corresponding aliphatic or alaromatic substituted thiophen or furan by a process comprising gradually adding bromine to an organi... | 03/30/1976 |
| 3945220 | Injection cooling arrangement for rotary compressor Liquid refrigerant is injected into the high-pressure side of a rotary compressor so as to cool the refrigerant being compressed to allow it to be useful in cooling the compressor motor. The injection port is located on the bottom face of the compressor c... | 03/23/1976 |
| 3946260 | Motor construction A compact AC-DC motor comprising a housing having a center section and respective end bells, each having a recess therein. A stator is received in the housing and extends into the recess in one end bell and a magnetic pole piece is similarly received in t... | 03/23/1976 |
| 3945554 | Ultrasonic soldering process A series of thin-walled, heat exchange tubes are soldered to return bends of similar materials so as to complete a flow path through the tube bundle by a process which comprises press-fitting the return bends to the tubes, preheating the return bends and ... | 03/23/1976 |
| 3944928 | Harmonic communication system A communication system comprising a transmitter for radiating a carrier frequency signal, which may be modulated, to a data station. The station includes a rectifier for rectifying the received carrier signal to provide energy to the station elements. A d... | 03/16/1976 |
| 3942718 | Electronic thermostat An electronic thermostat for controlling the operation of a temperature changing device such as a heater or a cooling device to maintain the temperature of an object at a desired level. The thermostat comprises a device in heat exchanging relationship wit... | 03/09/1976 |
| 3940863 | Psychological testing and therapeutic game device A game fostering the telling of a story based on iconographic stimuli. A set of objects and figurines are set up on a stimulus board. Each of these objects functions as an icon tending to invoke a significant primary emotion. Dice having different indicia... | 03/02/1976 |
| 3942176 | Ultrasonic alarm system An ultrasonic alarm system comprising a transmitter having an oscillator which produces an ultrasonic carrier frequency signal. An audio signal generator produces a signal which modulates the carrier signal. The modulated signal is applied to a crystal th... | 03/02/1976 |
| 3940128 | Exercising apparatus An exercising apparatus of the type simulating a pedaled vehicle wherein a pair of upright posts are mounted on a frame for respectively supporting a handlebar and seat. Drive means are mounted on the frame, and linkage means are provided for connecting t... | 02/24/1976 |
| 3940475 | Radioimmune method of assaying quantitatively for a hapten A radioimmune method of assaying quantitatively for a hapten comprising contacting an aqueous sample containing the hapten under assay, a known quantity of a radioactively labeled marker which incorporates a hapten homologous to the hapten under assay, an... | 02/24/1976 |
| 3934177 | Heat sink casing for circuit board components A case containing and supported on a channel like bracket that divides the case into two chambers. A first chamber contains the signal processing circuitry. The second chamber contains the power circuitry. The power transistors are mounted on the main wal... | 01/20/1976 |
| 3932085 | Mold base A mold base employs tungsten carbide mold cavities. These hard, brittle cavities are supported by softer, more resilient and more malleable metal support elements. Cams and sliding surfaces are above the parting line and the base is opened from below the ... | 01/13/1976 |
