GB264599A - Improvements in or relating to indicating devices for weighing scales - Google Patents

Abstract

264,599. Hewitt, A. H. Oct. 22, 1925. Indicating-mechanism.-The dial of a weighing- scale is provided with an indicating attachment for allowing for the tare of jars or other containers and the invention comprises in combination a dial pointer and two indicators, one of which latter is adjustable independently of the pointer and the other indicator, to give a net weight setting, and both of which are adjustable in conformity with the tare-registering movement of the dial pointer to indicate the gross weight. As shown in Figs. 1 and 2, two indicators 4, 5 are provided in addition to the usual pointer 3 which is actuated by the weighing mechanism. The net weight indicator 4 is adjustably mounted on the indicating spindle 7 but may be clamped to the pointer 3 by means of a screw 8. The gross weight indicator 5 is carried upon the glass cover 2 and may be adjusted angularly by means of a handle 6. In a modification, the indicator 4 may be adjusted by a head extending outside the glass cover 2. If it is desired to weigh, for example, 7 lbs. net into a container, the net weight indicator 4 is set at the figure 7 on the dial when tho pointer 3 is at zero, and the pointers 3, 4 are then clamped together by the screw 8. The empty container (weighing, for example, 1 lb.) is placed on the scale platform and the pointers 3 and 4 move to the positions shown in Fig. 1. The gross weight indicator 5 is now moved into coincidence with the indicator 4 and the container is charged until the pointer 3 coincides with the indicator 5. In a modification, Fig. 4, the net weight indicator 4 is secured to a spindle 13 passing through a sleeve 12 to which a tare indicator 5<a> is attached. A handle 6 is adjustably secured to the sleeve by a lock nut 20. The indicator 4 may be rotated independently by means of a milled head, or of a key applied to the head 14, or (after tightening-up a screw 17) may be rotated together with the tare indicator 5<a> by means of the handle 6. In using the attachment, the indicator 5<a> is set to zero and the indicator 4 is set to the net weight. The empty container is placed on the scale platform and the pointer 3 indicates its weight. The operator then moves the handle 6 until the tare indicator 5<a> coincides with the pointer 3 in which position the indicator 4 will have moved to a position indicating the gross weight, and the container is then charged until the pointer 3 coincides with the indicator 4.