Did You Know...
...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 4247088 | Mud gun A mud gun for closing a tap hole of a vertical furnace, especially a blast furnace, is provided with a novel mechanism for traversing the gun barrel and pressing the muzzle of the barrel against the tap hole under high pressure.... | 01/27/1981 |
| 4244387 | Rotary valve with temperature responsive seal means In a butterfly valve, comprising a valve disk pivotally mounted for movement between a closed position, in which the disk prevents the passage of fluid along a passageway, and an open position, in which the passage of fluid is allowed, an annular seal is ... | 01/13/1981 |
| 4242060 | Foot pumps A foot pump comprises a base member and an operating member pivotally connected to the base member. A piston-and-cylinder assembly is connected between the members. In use the user depresses the operating member with his or her foot, thereby causing air t... | 12/30/1980 |
| 4240330 | Servo booster assemblies Servo boosters for vehicle hydraulic braking systems are described which incorporate a novel arrangement for providing an increasing reaction force on the input member in response to an increasing output force. In the novel arrangement a first thrust asse... | 12/23/1980 |
| 4239240 | Rotary mechanical face seals An axially movable seal face member of a rotary mechanical face seal, for example for a ship's stern shaft, is sealed to its associated structure, and at the same time loaded axially, by the wedging action of a ring urged radially between two oppositely i... | 12/16/1980 |
| 4239296 | Control valve assemblies A control valve assembly for a vehicle braking system, comprises a valve controlling communication between an inlet and an outlet, the valve having a valve seat carried by a control piston and an inertia-responsive member, preferably a ball, movable into ... | 12/16/1980 |
| 4238102 | Spring supports A spring support particularly intended for supporting pipes in installations where the pipes are liable to move laterally while in use, as for example in the case of pipes through which steam is conveyed, has provision for locking its compression spring m... | 12/09/1980 |
| 4238455 | Denitrification reactor Disclosed is a denitrification reactor wherein each of catalyst cells is provided by packing a plurality of honeycomb catalyst blocks into a box-shaped frame with four corner posts; a plurality of vertical guide posts are erected in such a spaced apart re... | 12/09/1980 |
| 4236612 | Friction pad assemblies for rail vehicle brakes A friction pad assembly for a rail vehicle brake comprises a pad of friction material carried by a rigid backing plate, and the backing plate is detachably mounted on a shoe. A part-circular notch at one end of the shoe receives the stem of a headed stud ... | 12/02/1980 |
| 4236717 | Game machines A gaming machine of the kind in which a combination of symbols is selected at random by spinning and stopping each of a set of coaxial reels, each reel carrying a plurality of symbols around its periphery and serving to display at least one of these symbo... | 12/02/1980 |
| 4235459 | Marking system A marking system wherein distinctive, adhesive-backed separable markers are carried on a substrate, and printed on the substrate are images of the respective markers with a blank line being printed adjacent each image on which objects marked may be record... | 11/25/1980 |
| 4234061 | Disc brakes for vehicles In a vehicle disc brake a pair of friction pad assemblies are adapted to be applied simultaneously to the respective inboard and outboard faces of each of a pair of relatively fixed, axially spaced, rotatable discs by an actuator assembly. The actuator as... | 11/18/1980 |
| 4232520 | Actuator assemblies for vehicle hydraulic braking systems A power operated actuator assembly incorporates a stop mechanism for opposing movement of an actuating member if a booster fluid supply is operative. The stop mechanism comprises a chamber which is supplied with a metered proportion of pressurized fluid w... | 11/11/1980 |
| 4232909 | Vehicle load sensing assemblies A vehicle load-sensing assembly for use with a vehicle fluid-pressure braking system comprises an input member subjected to a force in a road spring and a valve which has a movable valve member for controlling the flow of fluid through the valve. A thrust... | 11/11/1980 |
| 4233599 | Malfunction detector for speed sensors A system is disclosed for monitoring operation of a speed sensor which produces a pulse signal with a repetition frequency related to the speed being sensed.An analogue speed signal is derived from a pulse signal having a repetition frequency related to t... | 11/11/1980 |
| 4231224 | Master cylinder assemblies for vehicle hydraulic braking systems In a master cylinder assembly of the kind in which transfer chambers in pedal-operated master cylinders are connected by a transfer passage, each master cylinder has a transfer valve which is normally open and which is movable into a closed position to is... | 11/04/1980 |
| 4231121 | Metacarpal-phalangeal prosthesis The disclosure is of a two-part prosthesis which is particularly designed and intended for intramedullary implantation in substitution for the metacarpophalangeal (MP), phalangeal-interphalangeal (PIP) or distal-interphalangeal (DIP) joints.... | 11/04/1980 |
| 4231414 | Handling foundry materials In a rotatable shake-out drum designed to receive refractory moulds containing hot metal castings and to break them up, cooling water is fed to the drum in synchronization with the feeding of moulds to the drum so that the quantity of water fed into the d... | 11/04/1980 |
| 4230659 | Method for forming a rupturable area in a container A method of making a wall of a container which wall is to be ruptured to gain access to the interior of the container, the method comprising forming a weakening in the wall corresponding to the path along which the wall is to be ruptured, locating the wal... | 10/28/1980 |
| 4230134 | Instrument for use in hair cutting The disclosure is of a device used in a hair cutting procedure, comprising a pair of comb-like parts having alternately positioned teeth which may be moved into and out of engagement to alternately hold and release the hair.... | 10/28/1980 |
| 4229855 | Wheel units A wheel unit for attachment with like units to for example a cardboard box to create a wheeled toy for a child comprises a mounting member having three generally orthogonal parts defining a corner for receiving a corner of the cardboard box, a wheel rotat... | 10/28/1980 |
| 4230376 | Anti-lock brake control system II In an anti-lock brake control system for a vehicle with braked wheels, a brake pressure release pulse is produced in a manner dependent on wheel deceleration and is processed so that it cannot exceed a preset maximum length and is spaced from any other br... | 10/28/1980 |
| 4225993 | Circular lifeboat A substantially circular, round lifeboat provided with a flat bottom surface and upwardly curved sides, the interior of the boat being provided with a series of concentrically arranged seats for the passengers, mostly near the bottom of the boat to provid... | 10/07/1980 |
| 4225017 | Disc brake and support structure therefor A disc brake having a caliper member which straddles a minor portion of the periphery of a rotatable disc and which is displaceable with respect to a fixed torque-taking member of the brake for applying friction elements to opposite sides of the disc. The... | 09/30/1980 |
| 4225192 | Antiskid control valve A pendulum responsive to excessive deceleration operates a valve which creates a pressure differential across a pressure responsive member to close an inlet valve to the brake chamber and expand an outlet chamber to thereby reduce the rear brake pressure.... | 09/30/1980 |
| 4225560 | Nuclear fuel reprocessing apparatus According to one embodiment of the present invention, the oxygen gas is introduced into a horizontal, unitary and totally-closed furnace shell, and nuclear fuel to be reprocessed is charged onto an oxidation and separation plate which is horizontally disp... | 09/30/1980 |
| 4223954 | Control valve assemblies for hydraulic braking systems In a control valve assembly for vehicle hydraulic braking systems pressurization of a distributor chamber in a housing is controlled by a valve operating mechanism. The valve operating mechanism comprises a piston working in the distributor chamber, a rec... | 09/23/1980 |
| 4218918 | Device for sampling gases in blast furnace A device is disclosed for inserting a lance into a vertical furnace, especially a blast furnace, so as to sample gases and measure the temperatures or pressures thereof, thereby obtaining the accurate information of operating conditions in the furnace.... | 08/26/1980 |
| 4219319 | Machines suitable for use in the manufacture of ceramic ware A machine suitable for use in removing seams from cup handles comprises means in the form of a turntable for carrying a plurality of sponges, viz. four, step-by-step successively through a series of operating stations at two of which smoothing operations ... | 08/26/1980 |
| 4218882 | Hydraulic power systems for vehicle braking and levelling systems In an hydraulic power system for operating a vehicle levelling system and braking system, an accumulator supplies both the levelling system and the braking system. The accumulator is connected indirectly to the braking system through a pressure limiting d... | 08/26/1980 |
| 4215954 | Workpiece disentangler Apparatus for disentangling workpieces is described which consists of a container into which the entangled workpieces are placed, a series of air jets located in the base of the container, and an outlet assembly consisting of a pair of overlapping relativ... | 08/05/1980 |
| 4214499 | Cutter tool with a plurality of hard cutting teeth A cutter tool of the kind having a blade body with teeth which are provided with hard material tips is so machined that the side faces of the tips are dished or otherwise concavely contoured. The machining involves mounting the blade body on a worktable and fi... | 07/29/1980 |
| 4214532 | Stemming In mining and quarrying an explosive charge is placed in a shot hole, and the subsequent explosion is contained by stemming. The invention provides stemming made from stemming plugs, each consisting of a self-supporting body made principally of sand bound... | 07/29/1980 |
| 4214850 | Variable-capacity radial turbine A variable-capacity radial turbine is provided with a gas flow rate control plate which may throttle a restriction of a scroll-shaped channel of a turbine casing, through which flows the exhaust gases into a turbine impeller, so that the impeller may rota... | 07/29/1980 |
| 4214775 | Suspension assemblies for vehicles An hydro-pneumatic suspension assembly for vehicles comprises a pressure chamber in a combination with an hydraulic suspension unit of the self-levelling type. The unit incorporates a spool valve for maintaining the length of the unit at a predetermined v... | 07/29/1980 |
| 4210370 | Anti-skid vehicle braking systems In a fluid-pressure operated anti-skid braking system operation of a brake applying relay valve is controlled by application pressure in an application chamber. A memory chamber is connected to the application chamber through a one-way valve and a restric... | 07/01/1980 |
| 4210229 | Disc brake assemblies A disc brake assembly includes one or more rotatable friction discs which are slidably keyed to a second portion of a two part shaft assembly and the second portion surrounds and is rotatable relative to the first portion which transmits drive directly to... | 07/01/1980 |
| 4209203 | Anti-skid brake control system An anti-skid brake control system has a brake pressure control unit for producing a release signal to trigger the release of brake pressure and a subsequent re-apply signal to trigger the re-application of brake pressure in successive brake pressure relea... | 06/24/1980 |
| 4206898 | Spring supports A spring support of the constant spring force type suitable for supporting pipes in installations where the pipes are liable to move laterally while in use, as for example in the case of pipes through which steam is conveyed, is arranged so that the pipe ... | 06/10/1980 |
| 4205466 | Carriers for studs for footwear It is known for sports shoes, particularly golf shoes, to have carriers anchored in their soles for receiving replaceable studs provided with screw-threaded connecting portions. The invention provides a carrier of plastics material having an internally-th... | 06/03/1980 |
