Patent GB-186570-A (GB)
Title: Improvements in and connected with stamping apparatus for the automatic stamping of the results of measurement, particularly for leather measuring machines of the sawyer type
IPC: G01B5/26
Filed: 1921-11-18
Abstract: 186,570. Krupp Akt.-Ges., F. Sept. 24, 1921, [Convention date]. Number-printing apparatus. - In apparatus, provided with more than one type-wheel, for automatically printing the results of measurement, particularly for leather measuring machines of the Sawyer class, each type-wheel is provided with a locking-device consisting of a ratchet-wheel and a detent, the locking devices being so dependent upon a single controlling-device that the type-wheels are locked in sequence commencing with the wheel of lowest denomination. The shaft b<1> is flexibly driven by means of an arm s keyed to it and connected by a spring with the chain wheel B which rotates loosely on the shaft b<1> and is driven from the adding-mechanism. Keyed to the shaft b<1> is a driver b<2> which bears in the direction of arrow x against a nut C mounted to move longitudinally on the threaded sleeve b<4> of the driver b<2> and on a bolt d<1> mounted a disc D. To this disc is rigidly fixed a rack d<2> of 300 teeth, comprising thirty plates d<3>, each having ten steps on the inner side. A weighted lever E, E<1> pivoted at F carries a locking-pin e<2> opposite the rack d<2> and a roller e' engaging a cam g<1> which is mounted on a hollow shaft G surrounding a shaft G<3>. Opposite the steps on the plates d<3> is a pin h<2> carried by a weighted lever H, H<1> pivoted at F. This lever H, H<1> carries at one end a roller h<3> engaging a cam g<2> on the shaft G and at the other end a toothed sector h<5> gearing with a pinion J keyed to a type-wheel J' which carries ten types (0-9) for hundredths of a square metre. In the zero position, Fig. 3, the zero of this wheel is not exactly opposite the place where the impression is to be made, and the pin h<2> is slightly distant from that step of the plate d<3> lying nearest to it. The disc D is connected with the type-wheel D<5> by an elastic coupling comprising a lug d' on disc D and a U-shaped flat spring K embracing two bolts d<6> on the wheel D<5>. Carried by this wheel D<5> are three series of types (each 0-9) for indicating tenths of a square metre, and a ratchet-wheel D' of thirty teeth so that to one tooth of D' correspond ten teeth of the rack d<2>. Opposite, the ratchet D' lies a locking- pin m<2> carried by a weighted lever M, M<1> which also has a roller m<4> engaging a cam g<6> on shaft G. When the pin e<2> engages in the rack d<2>, the pin m<2> is displaced relatively to the tooth point next to it by one-twentieth of the pitch of the teeth D', or one-twentieth plus whole tenths of this pitch. To the type-wheel D<5> is fixed a pinion d<8> gearing with a toothed wheel N in the ratio of 3 : 10. Connected with the wheel N by a U-shaped flat spring P is a type. wheel N' carrying ten types (0-9) for the whole square metres and carrying a ratchet-wheel N<2>, which is engaged by a pin q<2> on the waighted lever Q, Q<1> pivoted at m<3> and having a roller q<3> engaging a cam g<4> @@ the shaft G. The cam g<4> is wider than the cam g<6>, which in turn is wider than the cam g<1>. The ratchet-wheel N<2> carries a roller T having fixed to it a band t<3> supporting a weight T<1>. In the zero position the disc N' is not exactly in the printing position, but when the pin m<2> enters a gap between two of the teeth D', the pin q<2> is displaced relatively to the tooth point next to it by about one-twentieth of the pitch of teeth N' or one-twentieth plus whole tenths of this pitch. When measuring a piece of leather, the adding- mechanism drives the shaft b<1> in the direction of the arrow x, which in turn rotates the disc D through the driver b<2> and nut C. The disc D, through the fiexible coupling K, rotates the type-wheel D<5> and through pinion d<8> the wheel N, which then rotates, through the coupling P, the type-wheel N<1> and the roller T, which latter winds up the band t<3> and raises the weight T<1>. When the measuring operation is finished the shaft G<3> is rotated, by hand or otherwise, in the direction of the arrow z, and the cam g<1> releases the roller e3 and the lever E, E<1> and allows the pin e<2> to lock in the bottom of a gap between two of the teeth d<2>. Immediately afterwards the cam g<2> releases the lever H, H' so that the pin h<2> moves to the left and engages against that step on the plate d<3> which has been brought exactly opposite to it by the pin e<2> settling in the bottom of the gap. This causes the toothed sector h<5> to rotate the pinion J and exactly set the " hundredths " type-wheel J<1>. On further rotation of the shaft G<3> the cam g<6> releases the leyer M, M<1>. The disc D and ratchet-wheel D' have already been adjusted and the locking-pin m<2> then moves to the left and enters a gap between two of the teeth D', rotating the ratchet against the action of the coupling K so that the pin m<2> enters the bottom of the gap, thus exactly setting the wheel D<5>. Finally upon further rotation of the shaft G<3> the cam g<4> releases the lever Q, Q<1> so that the pin q<2> exactly sets the type-wheel N' in a precisely similar manner as the type-wheel D<5> was set. After the type. wheels have been locked, the machine is reversed so as to zeroize the indicating-disc of the adding mechanism. When this takes place the driver b<2> is lifted off the nut C which, during one revolution of the shaft b<1>, is moved along the fixed bolt d<1> in the direction of the arrow v and cut of the path of the driver b' owing to the rotation of the threaded sleeve b<4> and to the fact that the nut C projected into this path an amount less than the pitch of the thread on b<4>. The shaft b' then rotates freely. After the printing operation, the whole revolution of the shaft G<3> is completed so that the cams g<2>, g<6>, g<1>, g<4> again engage their respective rollers, thus releasing the locking pins form the ratchets and allowing the weight T' to descend and rotate the type-wheels back to their zero positions.