Abstract: A letter weighing device has a slidable fulcrum to indicate the exact weight of a letter or the like being weighed. The letter weighing device has an elongate member having upper and lower elongate surfaces, the upper elongate surface supporting two spaced apart and substantially parallel resilient ribs extending longitudinally along the elongate member so as to define a recess therebetween. Further, at least a portion of each rib extends in a direction generally toward the other rib. A fulcrum member is mounted upon the upper surface so as to be moveable along the length of the elongate member. The fulcrum member supports the elongate member from above. Additionally, a parallel pair of ribs define a recess therebetween in which additional items can be stored.

Abstract: A disposable marker apparatus for use with low torque recorders includes a bifurcated body with two separate ink reservoirs in the first and second body segments interconnected by a connector segment. The connector segment includes an ink transmitting member. A stylus tube extends from the body. A pivot member is provided to engage an associate pivot support outwardly from said pen body. A substantial portion of the mass of the marker is below the connector segment and the pivot member. The result is a marker having a center of gravity below the pivot so that the swinging marker tends to stabilize after disturbance due to vibration or rapid marker excursion.

Abstract: A rocking scale or weighing device can be constructed so as to include a body equipped with two separate, spaced, identical bowed supports or rockers which extend generally between the ends of the body. A holder capable of holding an envelope or the like perpendicular to the body is located at one of the ends of the body. Guides are provided on the body for use in holding a counterbalance member so that it may be moved towards and away from the holder. Indicia are provided for indicating the weight of an object held by the holder by the position of the counterbalance member on the body. Detents may be provided for use in temporarily securing the counterbalance member in a specific position.

Abstract: A sliding weight scale includes a recirculating ball spindle mounted in a balance beam arranged to pivot about a swivel axis. The spindle extends perpendicularly of the swivel axis. A sliding weight is engaged via a nut with the spindle. A gear wheel is fixed to the spindle and is driven by another gear wheel fixed on the base plate of the scale. A hand wheel drives an intermediate gear assembly which, in turn, drives the gear wheels and the spindle. The gear wheels driving the spindle are located in a vertical plane containing the swivel axis of the balance beam. By the use of the recirculating ball spindle, the displacement forces acting on the sliding weight are kept small so that dimensional variations occurring in manufacturing and assembly have a negligible effect on the weighing accuracy of the scale.

Abstract: A device for estimating postage requirements for envelopes and the like, and comprising a holder for supporting the envelope during the estimating process, a balancing lever pivotally secured to the holder and having a fulcrum about which the device may rock, and a recess provided at the outer end of the lever for receiving weighted elements therein which are calculated to generally counter balance the envelope in a manner for providing an estimate of the postage requirements for mailing of the letter in the postal system.

Abstract: An attachment to the beam of a weight scale has a vertical post to retain weight unit discs, each with a hole in the center, and clamping means in combination with a counterweight clamped to the second beam of the scale at the opposite end.

Abstract: A weight switching mechanism for a substitution type analytical balance is provided which permits the automatic selection and lifting of the required substitution weights from the gimbal assembly of a balance beam to allow accurate weighing of an unknown mass. A capacitive/electromagnetic feedback device is provided for sensing changes in the relative balance of the beam with respect to the applied unknown mass. The resultant current is applied to a force coil which maintains the beam in null position. A current related signal is converted to a digital input signal which is applied to a memory and control circuit and electronically displayed. A series of electromagnets, mounted below a printed circuit board and positioned to correspond with each substitution weight, is provided. The printed circuit board is arranged to lift upon release of the balance beam.

Abstract: A fluid collection, dispensing and measurement device for use in connection with a blood container, for example, and flexible tubing leading thereto. A hollow balance bar, with mobile spherical weights disposed therein is provided and rapid, forceful cut off of the blood flow through the flexible tubing is achieved when the moment created by the filling blood container, accentuated by the motion of the spherical weights, overcomes the moment produced by a preset adjustable counter weight. An adjustable clamping apparatus allows the fluid collection device to be affixed to a stationary object and subsequently adjusted to a level plane to insure accuracy of measurement. A simple modification of the device allows it to be used as a fluid dispensing device. A full container of fluid can be hung on the modified device and a measured quantity of fluid can be dispensed with cut off being achieved as described above.

Abstract: A balance beam having a short arm carrying a weighing pan and a long arm whose weight counteracts the torque exerted by the pan on the beam has a longitudinal edge extending over both arms and notched at uniform intervals. A rider weight is movable along the beam for alternative engagement with the notches in the two arms, the spacing of the notches being greater than in an otherwise equivalent balance having notches in the long arm only, and manufacturing tolerances in the making of the notches thus have a smaller effect on the precision of the balance.