US1674157A - Calculating device - Google Patents

Description

-June 19, 192s. 1,674,157

C. F. CHRISTOPHER` CALCULATING DEVICE Filed March 26, 1925 2 Sheets-Sheet l June 19, 1928.

1,674,157 c. F. CHRISTOPHER CALCULATING DEVICE Filed March 26, 192s 2 sheets-sheet 2 rE?. 5l f 5 7J' 9 4 2.9 W

Paten-ted June 19, 1928.

UNITED STATES CALVIN F. CHRISTOPHER, OF CANTON, NORTH CAROLINA.

CALGULATING Dnvron.y

i Application filed March 26, 1926. Serial No. 97,617.

This invention aims to provide a novel'and simple device yfor carrying on calculations readily, and to provide novel means for mounting the calculating mechanism so that it can be noted and operated readily It is within the province of the disclosurel tails of construction hereinafter describedv and claimed, it vbeing understood that changes in the precise embodiment of the invention herein disclosed, may be made with in the scope of what is claimed, without departing from the spirit of the invention.

In the drawings Figure 1 shows in elevation, a device constructed in accordance with the invention;

Figure 2 is a vertical section;

Figure 3 isa section on the line 3 3 of Figure 1; and

Figures 4 and 5 are fragmental elevations showing certain of the graduations.

The device forming the subject matter of this application comprises a support 1 in the form of a plate, having a central hub 2. Carriers 3, likewise in the form of plates, are journaled on the hub 2 and are located on opposite sides of the support 1, in contact therewith. Disks 4 are secured to the outer surfaces of the carriers 3. Securing devices 5, provided with knobs, are mounted on the carriers 3, near to the periphery thereof. The securing devices 5 carry clips 6. The clips 6 hold bezels 7 on the carriers 3. The bezels 7 retain crystals 8. Face plates 9 are located between the disks 4 and the crystals 8. The face plates 9 are held by caps 10 and securing elements 11 on the ends of the hubs 2. rlhe face plates 9, therefore, are fixed, whereas the carriers 3, the disks 4 and the crystals 8 are rotatable, the knobs 5 constituting means whereby the parts specified may be rotated. Indicators 12 are attached to the bezels 7 and overhang the fixed face plates 9. Each of the fixed face plates 9 has a ring of'numerals 14. Each face plate 9 has a radial line of numeralsl,

indicating whole numbers, and a radial line of fractional markings 16. Radially elongated openings 17 are fashioned in the face plates 9 below the numerals shown at 15. The rotatable disks 4 have radial lines of numerals 18. These numerals 1S .indicate the price of merchandise in quantities represented by the numbers at 15 on the fixed faceplates 9. The rotatable disks 4 have radial lines of numerals 19. The numerals at 19 indicatelthe price of merchandise in fractional quantities designated by the numerals 16 on the lined face plates 9.

Referring to Figure 1, for example, suppose that the operator is dealing in cloth at ll/c per yard. Then he turns the carriers 3 and the disks 4 until the indicator 12 yis on the numeral ll/in the ring 14, as shown yin Figure l.- Thiscauses the numeral 151/2 in vonev yof the radial lines 18 on the disk 4 to appear through the opening 17 in the fixed face plate 9. The operator can now ascertain at a glance, for instance, that nine yards of material at 151/2f: per yard will cost $1.40, and if he is dealing in fractional quantities, he can, by referring to the numerals shown at 16 and 19, ascertain that three-quarters of va yard of material at ll/Qt per yard will cost 12e. Between the outermost numerals in the lines 18 (Figure 4) on each disk 4, there are supplemental numerals shown at 20. The numerals indicated at 15 on the face plate 9 run to 10 only but, although the said numerals run to 10, only, the operator can make computations for 11 yards of cloth, or 12 yards of cloth, for instance, the numerals shown at 20, (Figure 1) indicating, respectively, that 11 yards of merchandise at 151/2t will oost 17 1, and that 12 yards at ll/2c will cost On each of the face plates 9 there is a table shown at 21. This table need not be described in det-ail, owingl to its simplicity. It can be seen, however, for instance, that if a person works four hours at 25, or a quarter of a dollar per hour, the sum of $1.00 will be due him: or that if he works threequarters of a day at $3.00 per day, the sum of $2.25 will be coming to him.

On each face plate 9 there is inscribed a table shown at 22 and useful in computations of various kinds, especially in connection with the numerals shown at 15. Thus` by the use of the table shown at 22, in conjunction with the numerals shown at 15, the operator may find out at a glance that threequarters of an articlewhich costs 9c, will obviously,

call for a payment of 7, orV that/five articles, at a half a cent apiece, Will cost three cents. The table 22 has an extension 23 which gives fractional values of ll andf12.; l

The-field of use for the machine as shovvn can be extended if thesupport l' and parts.

carried thereby is reversed and Ain order to provide for the aforesaid reversal, thes'upport or plate l is supplied at its sides With trunnions 24, Vterminating in enlarged heads 25 (Figure 3)', that are ournaledv in outstandn ing bearings 26'on a frame 27 'having an openingv 28 for the reception of a plate lV and attendant parts, the heads 25 being'held' as shown in upper end of the frame 27,:illurninates those be stood up any- Where. An electric lamp 31 mounted on the' portions of the device by which computations are made.

F or the convenience of an operator, a time piece 32 is mounted in the lower portion of the frame 27. V

What is claimed is:-

vl. In a. device of the class described, a carrier, 'a bezel on the carrier, mechanism for mounting the carrier for rotation; and means for rotating the carrier, said means engaging lthe bezel to hold it on the carrier.

2. In a jdevice 'of the class described, a carrier, a bezel on the carrier, mechanism Vfor mountingethe 'carrier for rotation, a securing device on the carrier, a clip on the securing device and lengaging the bezel to hold it on thevcarrie'r, and a knob on the securingde;

vice and retaining the clip, the knob constituting `means ivhereby the carrier may be rotated. v

' In testimony that I claim the foregoing as my own, I have hereto aiXed my signature. I

CALVIN F. oHRrsToPHER.'

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