Patent GB-191420296-A (GB)
Title: Improvements connected with Steelyard Weighing Apparatus.
IPC: G01G23/00
Filed: 1914-09-29
Granted: 1915-08-19
Abstract: 20,296. Avery, W. & T., and Gibbs, R. R. Sept. 29. Printed records, apparatus for giving.- Relates to a printing steelyard apparatus of the kind wherein a printed record can be obtained only when the steelyard is in equilibrium and comprises means whereby the steelyard may be engaged and maintained in the position of equilibrium after correct adjustment of the poise weights, means whereby the recording-mechanism is only operable when the steelyard is maintained in the position of equilibrium, means for rotating the printing-disks from the propulsion means of the poise weights, means for enclosing the propulsion mechanism of the poise weights whereby access to this mechanism can only be obtained at such time as the recording-mechanism is locked, and means for preventing the freeing of the recording- mechanism when the poise weights are not correctly set at the weight graduations. When employed in connexion with a ticket-printing device, means are provided for obstructing the ticket slot except when the steelyard is in equilibrium. The mechanism in connexion with each poise 9, 10 situated on the steelyard 1 is similar. Referring to the minor poise 9, a stirrup 51 slidable along guide-bars 60, 61 bv means of a handle 57 carries a vertically slidable member 49 which is normally retained in its upper position by a spring 58 but which may be lowered by a pivoted handle 53 so as to engage a slot 50@ in the poise weight, at the same time depositing a weight 21 upon an extension 19 of the poise weight and thereby tilting the poise nib 17 clear of the steelyard notches 16. The poise weight may then be traversed along the steelyard bv means of the handle 57, the printing-disk being operated by a rack connected to the slidable stirrup 51. The bar 60 is provided with vertical notches 128 corresponding to the steelyard notches and unless the nib 17 is correctly positioned in a notch a plate 130 on the slidable member 49 fails to enter the corresponding notch in the bar 60 and consequently the handle 53 remains in its upper position and prevents the closure of a hinged cover 107, which closure as hereafter described is an essential preliminary to the printing operation. The major poise weight 10 is controlled by, similar mechanism. When a load is placed on the apparatus, the hinged cover 107 enclosing the handles 57, 53 is raised by means of a handle 114 and the poises 9, 10 are adjusted until the steelyard pointer 83 indicates equilibrium. The cover 107 is then closed, and a handle 66 connected to a fork 75, 76 and to an horizontal slide bar 73 is slid laterally into the dotted-line position, Fig. 1, thereby (1) allowing a pin 121 carried by a lever 117 to swing into locking engagement with the cover 107 under the influence of a counterweighted lever 124, (2) causing the fork 75, 76 to embrace a hinged projection 74, Fig. 4, on the steelyard, and (3) releasing the printing-mechanism. If the steelyard is not in equilibrium position, the fork 75, 76 fails to engage, the hinged projection 74, which is thus pressed against a stop 82 on the casing without causing any lateral displacement of the steelyard, and the handle 66 and slide bar 73 are prevented from completing their traverse. If, however, the full traverse of the handle is permitted, the left-hand extremity of the slide bar 73 removes an obstruction 91 from the ticket slot 93 and also unlocks the printing-handle 100 by removing a lever 96 from the path of a bolt 99 secured to the printing-handle. A ticket is then inserted at the ticket slot 93 and a. printed record is obtained by means of the printing-handle 100 in the usual manner. A projection 111, Fig. 4, on the handle 66 extends into a longitudinal slot in the cover 107 and prevents the opening of the cover unless the handle 66 is in the full-line position shown on the left of Fig. 1. On returning the handle 66 to the full-line position, Fig. 1, the fork 75, 76 releases the steelyard, the ticket slut is again obstructed, the printing- handle is locked, and the pin 121 is disengaged from the cover 107 which may then be opened for further manipulation of the poise weights. The invention may be applied to weighing- apparatus employing tape recording-mechanism or both tape and ticket mechanism.