Abstract: A semiconductor die bonding machine for the electrical connection of the contact pads of a semiconductor die with the leads of a die holding device, such as a printed circuit board or main leadframe. The bonding machine utilizes micro leadframes formed in an aluminum foil tape and has an alignment mechanism which permits the rapid, mechanized bonding of the contact pads to the leads of the die holding device.

Abstract: An apparatus for accurately and conveniently weighing the load carried in a vehicle provides a readout of the weight of the cargo by sensing the relative vertical movement of the load-carrying portion of the vehicle, which is proportional to the weight of the load, and by converting the sensed relative vertical motion to a readout of the weight of the load.

Abstract: An apparatus for measuring the level, volume or rate of flow of an electrically conductive fluid, such as water, includes a reference conductor connected to a reference potential and a plurality of additional, vertically spaced conductors affixed to an insulating surface. The reference conductor is normally placed at the lowest point of the liquid container whereas the other conductors are positioned within the liquid container at various points above the reference conductor. When the level of the liquid is above the position of one or more of the additional conductors, the liquid effects an electrical conduction path between the conductors below the liqid level and the reference conductor and thus with the reference potential. The conductors are connected through a logic circuit to a plurality of display elements, which are selectively actuated to provide an indication of the level of the liquid corresponding to the uppermost conductor covered by the liquid and thereby connected to the reference potential.

Abstract: A device for indicating a disturbance in a liquid medium, which is especially useful for providing an alarm when a child falls into a swimming pool, comprises a buoyant member carrying a first conductive member, a second conductive member spaced and normally unconnected to the first conductive member, and an alarm circuit. The conductive members are connected to the alarm circuit such that when the liquid in which the buoyant member is floating is disturbed by a predetermined amount, the conductive members are brought into contact through the disturbed liquid, thereby to activate the alarm.