Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 4434671 | Tension sensor A tension sensor for sensing tension in the magnetic tape by measuring variations in an inductance value which arise as a result of applying stress which has been transformed from tension in the object to be measured to an amorphous magnetic alloy part of... | 03/06/1984 |
| 4434672 | Sampling device A sampling device for automatic analysis apparatus in which a probe is movable along a single circular arc between a sample take-up position and a wash and/or standard solution take-up position. A wash/standard solution is delivered to the probe tip at th... | 03/06/1984 |
| 4434673 | Cross arm structure for use in a pushbutton tuner A cross arm structure for use in a pushbutton tuner comprising a frequency setting plate pivotally supported on the cross arm and a pushing member disposed adjacent to the frequency setting plate for pressing or releasing the frequency setting plate in re... | 03/06/1984 |
| 4434674 | Piston and cylinder mechanism A piston and cylinder mechanism wherein the cylinder moves relative to the piston and the cylinder has a cam follower extending outwardly therefrom for engaging a cam track, the cylinder having some lubricant therein. A cam follower shaft is mounted in th... | 03/06/1984 |
| 4434675 | Transmission ratio control arrangement for a precess cam controlled infinitely variable traction roller transmission A transmission ratio control arrangement for a precess cam controlled infinitely variable traction roller transmission in which motion transmitting traction rollers are arranged between, and in frictional engagement with, toric discs mounted on input and ... | 03/06/1984 |
| 4434676 | Traction roller transmission with mechanical transmission ratio control In an infinitely variable traction roller transmission which has toric traction elements mounted opposite each other on coaxial input and output shafts with traction rollers arranged between, and in engagement with, the toric elements, the traction roller... | 03/06/1984 |
| 4434677 | Anti-backlash spring-mounted nut An anti-backlash nut construction wherein a base portion that is adapted to be carried by a machine part, has a bore through which a lead screw can pass. The nut has a threaded portion which is connected to said base portion and which has a bore matching ... | 03/06/1984 |
| 4434678 | Control mechanism for a window or door A control device is disclosed for selectively displacing two drive rod drivers which are coupled to drive rods of a window or door. The device includes a housing having a guide path defined therein for slidably receiving two drivers. The handle includes a... | 03/06/1984 |
| 4434679 | Speed-change operating device for a bicycle A speed-change operating device mounted directly on a frame of a bicycle, in which a screw thread only is provided at a direct-mounting bed fixed to the bicycle frame by a fixing means, such as welding, and a control lever is assembled in a lever shaft to... | 03/06/1984 |
| 4434680 | Planetary steering differential Continuously driven vehicle steering differentials have heretofore been too complex and have undesirably incorporated a second cross shaft for counter-rotating a pair of oppositely located planetary elements. The planetary steering differential (10) overc... | 03/06/1984 |
| 4434681 | Hydromechanical drive A hydromechanical transmission has an engine-driven power shaft connected to a variable-volume pump forming the input side of a hydrostatic unit whose output side comprises a constant-volume motor connected to this pump. A summing planetary-gear train has... | 03/06/1984 |
| 4434682 | Planetary gear The invention relates to a planetary gear having two adjacent identical central wheels of different pitch and a planet wheel whose pitch is equal to that of a virtual tooth row formed by the central wheel teeth. The teeth of the planet wheel extend into t... | 03/06/1984 |
| 4434683 | Saw-advancing means with edge engaging pad Saw-advancing apparatus in a grinder for circular saws which includes a pad brought into engagement with the edge of the saw by extension of a fluid-operated ram. The pad and ram are swung as a unit to produce rotation of a saw engaged by the pad.... | 03/06/1984 |
| 4434684 | Self-centering saw mount A mounting for a circular saw which rotatably supports the saw in a grinding machine. The mounting includes a mounting plate, and three roller mounts mounted for movement on the mounting plate in paths that diverge from each other extending outwardly from... | 03/06/1984 |
| 4434685 | Apparatus for cutting saw teeth into saw blades or saw bands An apparatus for forming a saw blade or saw band by forming saw teeth in a solid stock moving continuously in a longitudinal direction includes a grinding wheel mounted for rotation about an axis which is inclined at an acute angle to and which diverges f... | 03/06/1984 |
| 4434686 | Adjusting apparatus To adjust the relative positions of two elements mounted for guided sliding relative motion in a first direction and in a contact plane thereof, a cylindrical adjusting tool is fitted into a reference bore in one element and rotationally and non-slippably... | 03/06/1984 |
| 4434687 | Damaged screw remover A damaged screw remover comprises a handle and a shank terminating in a relatively wide blade, all resembling a standard screwdriver, the blade having a modified working end adapting it for engaging and rotating damaged screws. The working end includes an... | 03/06/1984 |
| 4434688 | Screwdriver An improved screwdriver that will not slip out of a screw head, having a screw head receiving element secured to a screwdriver shank. The screw head receiving element is provided with a screwdriver blade and is adapted to receive at least a portion of a s... | 03/06/1984 |
| 4434689 | Cutter head drive shaft for portable tube end preparation tool A portable tube end preparation tool includes an improved drive shaft for the cutter head of the tool, the drive shaft comprising a compact, three-piece assembly including two shaft portions that are axially aligned with respect to each other along the to... | 03/06/1984 |
| 4434690 | Rotary press punch ring and method of changing punches carried thereby A rotary press punch ring includes a collar mountable on a shaft of a rotary press and a plurality of punch ring segments, each of which carries a plurality of punches. The punch ring segments are removably and interchangeably attached to the collar so th... | 03/06/1984 |
| 4434691 | Method and apparatus for sealing cut sheet material An automatically controlled cutting machine includes a conveyor table having an endless conveyor belt for moving segments of limp sheet material onto the table for cutting. A cutting carriage and blade are mounted for controlled movement over the support ... | 03/06/1984 |
| 4434692 | Grid-type bread-slicing machine A bread slicing machine comprises a grid (20) of vertically set blades (22) which are reciprocated longitudinally by an oscillator (29) driven by an electric motor (M2). Bread to be sliced is fed to the grid (20) by a horizontally reciprocable table (13) ... | 03/06/1984 |
| 4434693 | Plate positioning apparatus A plate positioning apparatus for use with a punch machine having a number one workpiece stopper that moves left and right along the direction of the X axis and a number two workpiece stopper that moves to and fro along the direction of the Y axis perpend... | 03/06/1984 |
| 4434694 | Food material slicing machine A food material slicing machine has a housing, a cutter mounted in the housing, a hopper pivotally mounted to the housing for receiving food material when the hopper is in a first position remote from the cutter and being pivotable to a second position in... | 03/06/1984 |
| 4434695 | Holder for a roller slitting knife A holder for a roller slitting knife is provided comprising a first selectively-operable piston assembly including a first piston and a first piston cylinder housing. The first piston has a non-circular, cross-sectional portion preferably configured as a ... | 03/06/1984 |
| 4434696 | Instrument for comparing equal temperament and just intonation Equal-ratio scales offer a choice of semitone accuracies ranging from a thousandth cent to a millionth of a cent, any note of which may be selected as a reference for a fully chromatic just-intonation scale whose ratios are absolute and may be modulated i... | 03/06/1984 |
| 4434697 | Indicator apparatus for indicating notes emitted by means of a musical instrument The sound to be identified is converted into an electrical signal which is applied to an amplifier (11), a filtering circuit (13) and a calculation device (20); the calculation device comprises a microprocessor (21) and associated memories (22,23) compris... | 03/06/1984 |
| 4434698 | Transposable sheet music A system for devising a sheet of music and for transposing the music from one key to another. A layer of opaque material having standard music indicia disposed thereon is interposed typically between a first and second overlay of transparent material whic... | 03/06/1984 |
| 4434699 | Ammunition feeder A feature of this invention is the provision of sprocket which feeds rounds into the gun via an intermediate sprocket and which receives cases from the gun via another intermediate sprocket, and which may be intercoupled with either of two endless conveyo... | 03/06/1984 |
| 4434700 | Automated ammunition mixer Ammunition sorting system including a plurality of storage hoppers each adapted to releasably store a different type of ammunition, and a conveyor system including in sequence a plurality of rungs, each rung having two alternative dispositions, one wherei... | 03/06/1984 |
| 4434701 | Apparatus for conveying cylindrical objects such as ammunition Apparatus for conveying cylindrical objects such as ammunition by means of a series of separate seating plates driven to rotate in synchronism, associated with two guiding members separated by a distance at least equal to the diameter of the objects, the ... | 03/06/1984 |
| 4434702 | Telescoping periscope A periscope for a military land vehicle to provide observation capability er hills or other obstacles. The periscope includes two telescopic tubes movable at different rates to position a sight head assembly at different elevated positions; a relatively l... | 03/06/1984 |
| 4434703 | Gun-mount for a machine gun supported by a fork or for a weapon of a similar kind with means for continuously variable adjustment of the elevation of the upper swivel arm A gun mount e.g. for a machine gun supported by a fork comprises two mutually hinged swivel arms (2 and 3) in staggered position the one at a higher level than the other and designed to rotate around vertical axes (30, 31). The lower swivel arm (2) has a ... | 03/06/1984 |
| 4434704 | Hydraulic digital stepper actuator An apparatus for converting pressure into motion includes a housing having a plurality of ports formed therein. Movably disposed within the housing is a piston having a first plurality of apertures communicating with a first chamber and a second plurality... | 03/06/1984 |
| 4434705 | Introduced in the hydraulic actuation for the alternative movements of the swinging arms of petroleum extractor machines A reciprocable drive mechanism has a fluid pressure operable ram controlled by a spool valve, a two-position valve and a braking valve. During a powered stroke of the ram, the spool valve closes an exhaust path of the two-position valve so that the latter... | 03/06/1984 |
| 4434706 | Power-assisted steering device for a vehicle A power-assisted steering device for a vehicle comprises a two-part steering column which parts are capable of limited relative angular displacement, and a hydraulic power-assistance mechanism responsive by means of a hydraulic distributor to relative ang... | 03/06/1984 |
| 4434707 | Vacuum type brake booster device for vehicular use A vacuum type brake booster device is provided which comprises a booster shell of substantially elliptical shape in transverse cross section, a booster piston of similar shape as the booster shell and accommodated therein for axial reciprocating movement,... | 03/06/1984 |
| 4434708 | Control valve for double-acting piston and valve assemblies An improved control valve for double-acting piston and cylinder asemblies is disclosed in which pressure for actuating a regeneration valve to direct hydraulic fluid from the contracting side of the piston to the expanding side, is controlled by a cylindr... | 03/06/1984 |
| 4434709 | Axial piston pump Axial piston pump comprising a rotatable cylinder block (16) within which at least one piston (20) is mounted slidable in a cylinder (18) and by rotation of the cylinder block is imparted a reciprocating movement by becoming inclined from a neutral or nul... | 03/06/1984 |
| 4434710 | Grille mounting means and method Apparatus and a method are disclosed for mounting a grille assembly to a sleeve designed for installation of an air conditioning unit. Rotatable mounting channels are secured to brackets of the grille assembly and may be manipulated from the interior of t... | 03/06/1984 |
