Patent GB-191407450-A (GB)
Title: Improvements in or relating to Calculating Apparatus.
Filed: 1914-03-24
Granted: 1915-06-24
Abstract: 7450. British United Shoe Machinery Co., [Krippendorf Kalculator Co.]. March 24. Multiplying-apparatus.-A machine fur calculating the area of leather required for cutting- out boot or shoe parts for a number of boots &c., according to various lengths and widths, qualities of leather, allowances for wastage, &c., derives the quantity from the known area for one standard part by multiplying this area, which is to be set in the machine, by the factors representing the other variables, for each of which setting-parts are provided. The number of boots and their lengths are taken account of by a manual differential rotation of disks 2, Fig. 6, loosely mounted upon a central shaft 4 and interconnected by locking-levers 6. The disks have equal peripheral graduations, marked by studs 5, the interlocking of the disks causing the amounts set on the various disks to give a cumulative angular rotation to the actuating bottom disk 3 which has secured it to an horizontal actuating-disk 7, against the lower surface 8 of which bears a wheel 11 upon a shaft 12 actuating a counter 24. The driven wheel 11 is mounted in a carriage 13 and can be adjusted radially to take account of the various factors involved in the calculation. The shaft 12 is pivoted on the carriage and is pressed upwards into engagement by a spring 21 ; it can be moved out of engagement by a handle 18, Fig. 5, for a radial adjustment of the carriage, which is arranged to take account of the remaining factors of the calculation and is effected by the following settings. A band 38, Fig. 2, connected to the carriage is secured to a segment 37 carried by a graduated wheel 30. This wheel has peripheral holes engaged by a spring plunger 58, and when the plunger is withdrawn, it may be rotated to bring a desired number on its scale beneath a reading-aperture (not shown), these numbers representing the first two figures of a number selected from a table giving, in hundredths of square feet, the areas for different parts of a boot of standard size according to the leather to be cut and the style of the boot. Thus, for the vamps of kid boots of the ' Circular Foxed Polish ' style the number to be set is ' 117,' the terminal figure being set by means of a fine-adjustment sector 50. The withdrawal of a spring-pressed plunger 83 admits of further adjustment of the carriagepositioning wheel 30 by means of a lever, pin, and cam-slot connexion therewith (not shown). according to the desired setting upon ' a width ' scale 61. If an allowance is necessary for the quality or size of the leather from which the parts are to be cut, a number upon a scale plate 90 other than the standard ' 5 ' is brought into the pointer recess 84 of the plate 85, and since this recess is used for the ' width ' setting, the necessary adjustment will be effected. Similarly, half sizes in width are provided for by means of the marks ' ¢ Up ' and ' ¢ Down ' on this scale plate, which are brought opposite the pointer recess. Cam-parts (not shown) take account of the necessity for setting these factors upon an increasing scale as the wheel 11 moves farther from the centre of the disk. Several wheels 11 may be rotated from one actuating bottom disk 3, each supplied with its own adjusting-parts, whereby the areas requisite for cutting different parts of the same group of boots &c. may be computed. Zeroizing-mechanism.-The wheel 10 is operated to restore the setting-members and reverse the train, any residual displacement from zero being accounted for thus. The U-shaped counter-disengaging lever 18 with a handle 22, Fig. 5, carries adjustable pins 26 adapted, on depression of the lever, to strike the inclined sides of a wedge-shaped cam 25, whereby the units wheel of the counter 24 is brought to zero.