Patent GB-191500006-A (GB)
Title: Improvements in or relating to Adding or Calculating Machines.
Inventor: WADE HAROLD
Filed: 1915-01-01
Granted: 1915-10-21
Abstract: 6. Wade, H., [Burroughs Adding Machine Co.]. Jan. 1. Transfer mechanism; zeroizing - mechanism for adding-machines, more particularly those of the kind described in Specification 24,996/11, comprises gearing meshing with a wheel turning with the lower order wheel and with an intermediate wheel in gear with the higher order wheel, the gearing being carried by a member which is pivoted about the axis of the wheel turning with the lower order wheel, so that the gearing may be swung bodily either to turn the higher order wheel one step, for transfer, or to turn the lower order wheel for zeroizing. The invention is shown in Figs. 4, 6, 9<a>, and 11 as embodied in a special model, and in Fig. 15 as applied to a machine of the kind described in the above-mentioned Specification. Toothed rings A<1>, B<1>, receiving actuation from pinions E<2>, Fig. 4, carry planetwheels D, D', Fig. 9<a>, gearing with internal teeth F, F<1> on the numeral-wheels A, B, as described in the above-mentioned Specification. A snail-cam G secured to the lower order wheel A raises a lever H, Fig. 6, against the action of a spring J, the end of the lever H being connected by a link M to one end of a member L pivoted about the axis of a toothed wheel P fixed to the face of the cam. The member L carries wheels O, N gearing respectively with the wheel P and an intermediate wheel C, the hub of which carries a wheel E<1> in gear with the planet-wheel D<1> of the higher order wheel. During the raising of the lever H by the cam, the wheel N rolls on the wheel C without turning the latter; but when the lever is retracted by the spring J and the member L consequently rocked backwards, the wheel C is moved through a fifth of a revolution and the higher numeralwheel through a tenth, such movement taking place whether the numeral-wheels are moving slowly or rapidly as the result of direct actuation. In a modification, Fig. 11, the part H is formed with teeth gearing with a curved rack on the part L, the movement of which is limited in one direction by a stop a and in the other by a lug b engaging the cam. In the machine shown in Fig. 15, the outer ends of the set of levers H are adapted to be raised by a bar T to effect the zeroizing. The bar is carried by a number of links U connected to arms W on a shaft X adapted to be rocked by means of a handle Z<1> and link X<2>. A rod V on the arms W passes through cam-slots x in levers U<1> so as to raise the arms U<2> of the levers into the path of pins e on the wheels C to prevent them from moving, and thus to cause the numeral-wheels to be turned by the members L back to the nine' position, provision being made to lift the lever H of the lowest order wheel further, so as to return that wheel to the ' zero' position. On the release of the handle Z<1>, transfer takes place throughout the train of wheels. In order to allow for the movement of the stop-arms U<2> in advance of that of the bar T, the ends of the links U are slotted, as shown. The bar T is guided in slots c in the frame plates and the movement of the levers H is limited by a stop-bar Z, the end lever being notched to allow of its further movement. A cross-bar W<1> on the arms W engages a projecting portion W<2> of the locking dogs for the numeral - wheels so as to unlock them simultaneously for zeroizing.