A solid-state heading sensor is comprised by a three-axis Hall effect magnetometer and a three-axis accelerometer. The magnetometer is comprised by a cube-like structure (10) of non-magnetic material on each of three orthogonally related faces of which is located a respective Hall effect device (11, 12, 13), for example of GaAs. The three-axis accelerometer may be comprised by a three-axis module (15) disposed in a recess in the cube-like structure, or by three separate accelerometer structures ...

The roof of a heading cut by a continuous mining machine is supported by cantilevered roof beams forming part of a shield. There are at least two sets of roof beams which can be raised and lowered separately by means of hydraulic rams. When one set is lowered and the other set is raised, the lowered set can be pushed forward against the raised set by means of hydraulic rams. The cantilevered roof beams extend far enough forward to support the roof over the driving position of the continuous mini...

A heading indicator is disclosed which utilizes a one-degree-of-freedom platform stabilized by a two-degree-of-freedom dry flexure gyro. The output of one of the sensitive axis is coupled through an amplifier to the corresponding torquer in the gyro and selectively through another amplifier to the opposite torquer. The other sensitive axis output is coupled through an amplifier to the platform. The indicator initializes to true north and is then switched to a directional gyro mode.

A heading machine for joining and shaping, by cold welding under pressure, cut lengths of wire of respectively different metal compositions is disclosed as including means for feeding continuous wires of the different metal compositions, means for severing that short lengths of the different wires, means for positioning and retaining the short lengths in axial alignment with each other, pressure means for forcing the cut ends of the short lengths of wire into abutment to cold weld the short leng...

A drum heading machine for securing a closure plate within an end of a tubular element or sleeve includes a mandrel for supporting the sleeve thereabout with an end of the sleeve projecting beyond an end of the mandrel to define a sealing area on the inner surface thereof and for supporting a closure plate disposed within the sealing area of the sleeve and in contact with the adjacent end of the mandrel, the outer peripheral sealing edge area of the closure plate being arranged to engage the inw...

An easy and quick method of placing a stiffening heading to draperies without the use of a sewing machine and the help of pins or staples. The invention discloses the use of any drapery stiffening or heading with at least one and preferably two fine lines of adhesive or glue having a low melting point positioned on the heading parallel to the longitudinal side edge thereof. The drapery fabric or crinoline is joined to one line by heat sealing and then the stiffening is turned inside of the upper...

A machine for producing headed blanks from wire stock in which continuous wire stock is fed through a reciprocating ram by means of reciprocating gripper jaws which are adjustable for position and feed length and which are cam urged into engagement with the wire at a specific instant in the machines cycle. The heading machine includes a die block containing a plurality of dies which can be rotatably indexed. The free end of the wire passes through a bush in a cut-off mechanism and into a die cav...

A trolling motor with heading lock coupled to the trolling motor and producing a thrust to pull a watercraft is disclosed. The system contains a bow-mounted motor and a steering motor connected to the bow-mounted motor. The outputs of a heading detector circuit and desired heading circuit are compared by a steering control circuit and used to generate input signals to the steering motor.

Clearance take up means is provided to take up the running clearance between the bed frame and slide of a progressive former at least near the end of the advance of the slide to top dead center, so that the advance is completed under essentially zero clearance conditions. A header slide system must allow a certain amount of running clearance to give room for lubricant and allow for expansion of the slide and bed due to variations in the temperature of the slide and bed. This clearance however co...

A nail forming machine having a rotary transport ring for receiving axially elongate cut wire nail blanks and transporting the nail blanks to and through a forming station with the axes of the nail blanks carried by the transport ring disposed in axially parallel alignment with the axis of rotation of the transport ring. A clamping ring is supported for rotation within the transport ring. Radially outwardly open clamping recesses formed in the peripheral surface of the clamping ring cooperate wi...