Patent GB-190416957-A (GB)
Title: Automatic Weighing Machine
Inventor: BOLAND FREDERICK ADDISON
Filed: 1904-08-02
Granted: 1904-12-08
Abstract: 16,957. Boland, F. A. Aug. 25, A.D. 1903, [date applied for under Patents Act, A.D. 1901]. Platform machines; printing-devices; indicating and registering mechanism.-Relates to machines for weighing successive loads, the weight of each. load being indicated and printed and also the total weight summed. The machine may be fitted with a taring-device equivalent to the weight of the vehicles when a number of truck-loads are being weighed. In the arrangement shown, which is adapted for weighing in succession a number of trucks carrying different loads but each truck being of the same weight and the taring-device being constant, the platform 4, Fig. 3, is depressed, extending a pair of springs 22 a distance according to the weight of the truck. The truck is held by a stop automatically operated, so that it cannot be run off until its weight has been duly recorded. The recording-apparatus is contained in a casing, and is locked against improper use. The platform 4 is supported on knife-edges 7 on a series of levers 9 supported on bearings 13. The inner ends of the levers engage a forked lever 25 which is connected to the springs 22. A rod 40 transmits the movement of this lever to the recording-apparatus. To prevent sudden movements of the apparatus, a dash-pot consisting of a piston 32, Fig. 9, sliding in a cylinder is provided. The transmitting-rod 40 is connected to a rack 41, Figs. 5 and 6, which actuates the recording &c. mechanism. This includes five cams 51 ... 55 each having one hundred steps, the first step indicating the zero position and the others 1 to 99 lbs. The first cam 51 is adapted to be moved in either direction a distance according to the movement of the platform, a pinion 56 on a shaft 57 gearing with the rack, and a wheel 61 on the shaft gearing with a pinion 62 mounted on a sleeve to which the cam is secured. The maximum movement of the pinion 56 represents a load of 2500 tons, and this pinion turns 2¢ times while the cam makes 25 rotations, the movement being indicated by the pointers 70, 71, and the latter, through the gearing 65, 66, having a quarter of a revolution only. The mechanism for adding the weights of the loads is arranged so that it moves only when the platform descends. The shaft 57 carries a gear-wheel 75, Fig. 8, gearing with a pinion 76 secured to a clutch member 77, Fig. 6, which is preferably a crownwheel, having one hundred teeth, loose on the shaft 63'. Also loose on the shaft is a cross-piece 80 having coupling-pins 81. A coupling-element is splined to the shaft so as to rotate with it but to be capable of sliding longitudinally so as to engage or be withdrawn from the pins 81. Fixed on the shaft is a pinion 86, Fig. 6, gearing with the wheel 87 secured to a sleeve loose on the shaft 57. On the sleeve is a pinion 89 gearing with the wheel 90, to the hub of which is fixed another pinion, and so on. These gears are in fixed relation to the cams 53 &c. of the adding-set. In order to record the movements of the cams, they engage a series of arms 101 ... 105 having gear segments such as 112 meeting with pinions fixed to five registering or recording wheels 131 ... 135. The levers have square pins on their ends to engage the notches of the cams. These pins normally clear the cams, being held by a locking-device such as a bar 150, until released by the operation of a controlling-handle 170 or the like, springs 155 securing the movement of the wheels, which are provided with locking-devices and means for securing alignment. The handle 170 also controls the recording of the weights on a strip of paper p, Fig. 5, which is fed from a roll 180 by ratchet mechanism 185, 187 operating feed-rolls. The handle carries an impression plate 200, Fig. 6, which forces the paper against the type on the recording-wheels. The printed ticket may be cut off by a knife 221, Fig. 5, operated by the handle, which is formed in two parts. The controlling- handle also controls the clutch previously described, being connected to a sliding element by a system of levers 267 &c. Fig. 10 shows an arrangement for preventing the removal of a truck until its weight has been duly recorded. When the truck is run on to the platform 4, a treadle 235 is depressed and a stop 234 is raised. This stop is connected to the handle 170 through links 261 &c., and also with the recording-apparatus by the rod 260. The handle 170 &c. is contained in a locked casing, so that it cannot be operated by unauthorized persons. The tare counterpoise is preferably a beam 300, Fig. 4, provided with a sliding weight 301 pivoted within a hollow column protected by a door 302 normally locked.