US2352279A - Detachable spool mounting - Google Patents

Description

June 27, 1944. o, MEHAN 2,352,279

DETACHABLE SPOOL MOUNTING Original Filed May 25, 1959 2 Sheets-Sheet 1 I I I I I I I I l I I I I l I l I I I I 1 I I I I I i I I I I I I l I I I I I l I l I I INVENTOR.

f homa/s 0/78/1072 June 27, 1944. Q MEHAN DETACHABLE SPOOL MOUNTING 2 Sheets-Sheet 2 Original Fil ed May 25, 1939 INVENTOR; I BY Thoma ONE/72am Patented June 27, 1944 DETACHABLE SPOOL MOUNTING Thomas Mehan, Park Ridge, Ill.

' Original application May 25, 1939, Serial No.

Divided and this application October so. 1941. Serial No. 417,157

3 Claims.

This invention relates to detachable paper spool mountings for use in connection with adding and listing machines and particularly for use :with

. portable calculating machines.

Heretofore it has been customary in machines of the class above referred to, and particularly in portable calculating machines, to provide a pair of rigid brackets formed integrally with or in some manner permanently and rigidly attached to the frame of the machines designed to releasably retain and support a pin on which rolls of paper for adding and listing may be mounted. Ex perience has revealed a number of disad antages .in such constructions.-

pin-must extend far enough away from the main frame of the machine to allow clearance for'the mounting of the maximum sized paper spools that may be used on the machine. When such a support-is provided in a portable adding machine, it normally extends a considerable distance rearwardly of the remainder of the machine. Normally the casing for the machine is designed to enclose the working parts of the machine excepting the 'spool as snugly as possible. Generally such a support of a size adequate to retain" large spools will extend outwardly through an aperture -in the casing. When the machine is packed for shipping, special precautions must be taken to guard the projecting brackets against injury, because if they are struck a hard blow, they force thereof is transmitted to the main frame of the machine and often results in some misalignment of the frame which will render. the machine inoperative because of such distortion.

Similarly, when the machine has been unpacked and is in use, if it be of the portable type, these sameprojecting brackets are apt to be struck accidentally when the machine is beingcarried around or if it be dropped accidentally and again the main frame of the machine may be distorted with the same danger to its operativeness.

One of the objects of the present invention is to eliminate the permanent rigid protruding paper roll supports and substitute therefor a spool mounting including a holder which is integral with the paper spool itself, and which is preferably made of some light weight material, which if accidentally struck, will itself become distorted instead of transmitting the full force of the blow to the frame of the machine.

Another object attained by this invention and arising out of the use of the spool holder integral with the spool is that when the machines are shipped from the factory, the paper spool will not The support forsuch a till be mounted thereon, hence there need be no spool support projecting through the casing.

Another object of the invention is to provide paper spool holders so designed that they may be constructed in considerably different sizes to accommodate paper spools of greatly differing diameter, and yet all of these spool ho-ldersof different capacities can be connected to the mounting means on the machine with equal facility.

Another object of the invention isto provide all of the foregoing advantages in a construction which makes it extremely simple for an operator to attach a new spool to the machine.

Other objects and advantages of the invention will become apparent from aperusal of the specification in which a preferred embodiment of the invention is illustrated and described.

Referring now to the drawings,

Fig. 1 is aside elevation illustrating the mount ing of the paper spool holder on an adding machine of currentdesign.

Fig. 2 is a perspective view of the holder itself.

Fig. 3 is a sectional view showing the manner of attaching the holder to the frame of an adding machine.

Fig. 4 is another sectional view of the same device.

Referring now to the drawings, the adding ma,- chine on which the spool holder is attached is provided with a bottom frame plate I and a rear vertical frame plate 2. The spool holder is provided with two side plates 3 and 4 on which are I formed hooked projections 5. 6, I and 8 designed to engage appropriate apertures or notches in the rear fram plate of the machine. For convenience, the two upper hooked projections may be seated in notches 9 and H for-med in the upper edge of the rear plate 2 while a. pair of slots such as the slot 12, shown in Fig. 4, are provided at a lower position in the frame plate to receive the lower hooks 6 and 8.

A rock shaft l3 will be supported in any suitable manner adjoining the vertical plate 2, and on it will be fixed the locking dogs I4 and 15 which will normally be rotated to engage the upper margins of the hooks 6 and 8 by means of a spring I 6 anchored to the vertical plate 2 and to the cross member I! which is formed integrally with the locking dogs I4 and I5 and extends from one to the other below the rock shaft I3. Formed integrally with and depending from the cross member I1, is a thumb piece l8 which preferably will extend through an aperture l9 in the bottom of the frame plate I. By means of this thumb piece the operator may rock the locking dogs forwardly to disengage them from the hooks 6 and 8.

Each of the side plates 3 and 4 is provided with an inwardly extending boss, one of which is shown at 2|, to form a bearing for the cor of the paper spool.

To give some rigidity to the paper spool holder, I provide a pair of angle- shaped members 22 and 23 which may be secured to the side plates in any suitable manner. For example, their ends may protrude through the sid plates as shown and be swaged over.

All of the material used in this spool holder is preferably made of very light metal, or other light and inexpensive material.

It will be apparent that in order to engage the spool holder with the machine, it is necessary only to engage the upper hooks 5 and 'l with the notches 9 and II and push the hooks B and 8 through the slots such as l2, where theywill automatically be engaged by the locking dogs and the hooks pushed downwardly so that the notches, such as 24, inthe under side of the hooks will engage the vertical walls of th rear plate 2. To disengage the spool holder, the looking dogs are released by the thumb piece and the device lifted upwardly and rearwardly from the machine.

It will now be perceived by reference to Fig. 1 that normally the casing for the machine can be designed to snugly surround the working parts of the machine, such as th keyboard located at 25 and the rockable platen mechanism 26, and allow the spool holder to extend slightly rearwardly of the casing through an aperture therein. The casing to be used is, of course, not a part of this invention, but as will be understood by those skilled in this art, it is common practice to employ such a snug fitting casing as I have described. Even though the spool holder and spool itself extend beyond the rear of such a casing, the use of light weight and easily distorted material in the spool holder will permit it to absorb blows received thereby in accidents, without transmitting them with serious results to the main frame of the machine. If the holder be so distorted in an accident as to interfere with the feeding of the paper therefrom, a new holder and paper spool may instantly be substituted. Likewise, in shipping the spool holder would not be mounted on the machine, as it would be a part of the supplies for the machine and would be packed and shipped separately.

It will also be understood now how a spool holder designed to hold a paper roll much larger than that illustrated in the drawings can be attached just as conveniently to the machine without requiring any alteration of the machine to receive such a larger spool. Regardless of the diameter of the spool for which the holder is designed, the paper therefrom can, of course, be fed into the machine in the same manner, as I have illustrated in Fig. 3 showing the paper strip 2! fed upwardly and around the platen roll 28.

This application is a division of my application Serial No. 275,662 filed May 25, 1939, for a patent on lAdding machines, now abandoned.

It will now be appreciated that the invention herein described is applicable not only to adding machines but to other machines of the general class known as business machines which employ printing mechanisms.

It should be understood that the drawings and the foregoing specification illustrate and describe merely certain preferred forms of the invention, and that other modifications and variations of the invention are contemplated and are intended to be claimed in the appended claims.

Having shown and described my invention, I claim:

1. A paper roll support comprising a pair of end plates composed of thin easily distorted sheet material, oppositely aligned bosses on said plates near a margin thereof shaped for extending into an axial bore in a paper roll to form an axial supporttherefor, hook-shaped extensions on said plates for connection with a machine with which the roll is to be used, and rigid spacing elements of angle cross-section connecting said plates and positioned to clear the paper roll.

2. A paper roll support comprising a pair of end plates composed of thin easily distorted sheet material, oppositely aligned bosses on said plates near a margin thereof shaped for extending into an axial bore in a paper roll to form an axial supporttherefor, the opposite marginal portion of each plate being provided with hooked-shaped extensions for connection with a machine with which the roll is to be used, rigid spacing elements of angle cross-section connecting said plates adjacent said hook extensions and positioned to clear the paper roll.

3. A paper roll support comprising a pair of end plates composed of thin easily distorted sheet material, oppositely aligned bosses on said plates near a margin thereof shaped for extending into an axial bore in a paper roll to form an axial support therefor, the opposite marginal portion of each plate being provided with hooked-shaped extensions for connection with a machine with which the roll is to be used, rigid spacing elements of angle cross-section connecting said plates adjacent said hook extensions and positioned to clear the paper roll, the distance between the spacing elements and the bosses being determined by the diameter of the roll for which the support is designed.

THOMAS O. MEHAN.

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