US2522463A - Receptacle for magnetizable record strips - Google Patents

Description

Sept. 12, 1950 L. M. POTTS 2,522,463

REdEPTACLE FOR MAGNETIZABLE RECORD STRIPS Filed June 11, 1947 2 Sheets-Sheet 1 IIIHIHIIHIIIIIII ll 4 FIG. I r4 IIIIIIIIII l'lllll'lllllll l l l lll/ INVENTOR LOUIS 'M. POTTS, DECEASED MARTHA W. C. POTTS, EXECUTRIX ATTORNEY L. M. POTTS 2,522,463

RECEPTACLE FOR MAGNETIZABLE RECORD STRIPS Sept. 12, 1950 Filed June 11, 1947' 2 Sheets-Sheet 2 FIG. 4

M w 28 L ss T v IIIHIIIIL FIG. 3

000090000 OOODOOOOUOOOOOOOOOOQOOOO oooo2\ oooo OODOOOOOOOOOOOOOOOOOOOOO INVENTOR LOUIS M. POTTS, DECEASED MARTHA w. c. POTTS, ExEcuTmx ATTORNEY Patented Sept. 12, 1950 UNITED AT IPA-TENT.

, PT bLE-GNETIZABLE Louis M. Potts, deceased, late of Evanston, 111.,

1 byMartha ;W. C. Potts, executrix, Evanston, 111., assignor to Teletype Corporation, Chicago, 111., a corporation of Delaware Application June 11, 1947, Serial No. 754,033

1' comma (01. 346- 22) 1 This invention relates to, magnetic recording systems and more particularly to an arrangement for makin magnetic code recordings on magnetic plates.

The primary object of the invention is to provide a device for preparing a magnetic record on individual steel cards.

. Another object of the invention is to produce on a, steel card a magnetized record comprising a plurality of transverse rows of magnetized areas, and to feed in a novel manner unmagnetized cards into recording position.

Briefly, the arrangement according to the present invention comprises a magnetic card recorder and automatic feeder from a stack of cards. The system provides for the transverse magnetization of the card through the use of .five magnets, each code impulse being a northsouth or south-north magnetization in a pair, depending on whether a marking or spacing condition exists. The five magnets are eachcontrolled by a magnet controller contact while a card feed magnet is also controlled by a contact.

The controller contacts could be operated by having a set of code bars, as disclosed in copending Potts application SerialNo. 755,446 filed June 18, 1947, control the code controller contacts,

and the universal bar control the feed controller The foregoing and other objects and features of the present invention will be more fully described in the following description when considered in the light of theaccompanying drawings, wherein:

Fig. 1 is an elevational view of the device according to the present invention with certain Fig. 4 is a schematic diagram of the electrical circuit employed with the device ofthe present invention. a .1

Having reference to Figs. 1 and 2 of the drawin'gs, wherein similar referencev characters represent similar parts throughout the several views, the device according to the invention comprises a pair of side plates II and I2 (Fig.

2) in which are journaled for rotation the ends of two shafts I3 and I4. A stud shaft I5 is carried in plate I2 intermediate the shafts I3 and I4. Fixed to shafts I3, I4, and I5, externally of side plate I2, are gears I6, I1, and I9, respectively, of such diameter that the shafts I3, I4, and I5 rotate at the same speed and make one revolution while a card or ticket I9 is advancing for its full length.

Fixedly mounted on shaft I4 and positioned adjacent the inside faces of side plates II and I! are a pair of sprocket feed wheels 2I and 22 which are adapted to cooperate with marginal rows of feed holes in the card I9. Shaft I3 is also provided with a pair of sprocket feed wheels 23 and 24 positioned in alignment with the . corresponding sprocket wheels 21 and 22 and with the marginal feed holes. 25 and 26 in the card I9. A ratchet 21 is fixed to the shaft I4 and is provided with teeth having an angular pitch corresponding to the spacin of the feed holes .25 and 26 such that for each unit step imparted to the ratchet a, corresponding unit step will be imparted to the card I9. As observed in Fig. 3, a row of code marks is aligned with the feed holes 25 and 26. Associated with the ratchet wheel. 21 is a feed pawl 28 pivotally carried at-the ex-,- ,tremity of a lever 29 pivotally mounted on a suitably located pivot 3|. A spring 32 normally biases the pawl 28 toward the periphery of the ratchet wheel 21. 4 The lever 29 is provided with an armature .33 which is adapted to coact with the core of an electromagnet 34 appropriately mounted onv a bracket 35 in the present device. When the magnet 34 is energized, the pawl 28 is advanced to engage the next tooth of the ratchet 21; and

when the magnet 34 is de-energized, a, spring 36 attached to lever 29, operates the lever 29 counterclockwise (as viewed in Fig. l) to advance the ratchet wheel 21 one tooth-or angular step in a counterclockwise direction. On the, shaft I3 there is fixed a star wheel 31 corresponding in number of angularly spaced teeth to the ratchet wheel 21. Star wheel 31 is adapted to be engaged by a jockey or detent member 39 so asto accurately locate the card I9 for impressing a magnetic record thereon.

A cam disc 39 is fixed to the shaft I4 and is positioned between the sprocket wheel 2I and the side plate I2. Cam disc 39 is provided on. its periphery with a cam notch 4| and at thebottom of the notch 4| and secured to theiace of the cam disc 39 is a small permanent magnet 42. A cam disc 43 of like size and characteristic is also fixed to the shaft I4 between the sprocket wheel 22 and the side plate II.

The device according to the present invention also is provided with a magazine or hopper 44 comprising the side plates II and I2, a rear plate 45 and a front plate 46. The magazine 44' carries the blank forms or steel cards l9 which are supported by rollers 4'! and 48. The feed pins 49 on the sprocket wheels 2| and 22 engage the feed holes 25 and 26 in only the lowermost one of the cards or steel plates l9. The forward end of the plate I! is fiaredas at 54, to cooperate with the cam disc 39 and 43.

When the notches 4| are rotated into registry simultaneously with the flared portions 5| of the lowermost plate [9 the permanent magnets 42 pull down the front end of the plate l9 onto the sprocket wheels 2| and 22, whereupon the pins 49 engage the feed holes 25 and 26. the sprocket wheels 2| and 22 are rotated by the stepping action of the stepping magnet 34 through pawl 28 and ratchet wheel 21, the lower most card [9 is ejected from the magazine, and the next lowermost form or card I9 is moved to Then, as

the left, and after a very small amount of motion the forward end thereof is held by the front plate 48. The relation between the notch 41 and the length of the flared portion 5! is such that the advancing card [9 will not be lifted from the pins 49, but at the proper instant the high part of each cam disc will engage the flared portions 5| of the next lowermost plate [9 and thereby hold said plate out of engagement with the sprocket teeth 49 until the leading edge of notch 4! has again reached the lower edge of front plate 46.

The new or lowermost card is engaged by the sprocket wheels 2! and 22 is advanced ina stepby-step manner leftwardly through the guide rollers 52, 53, 54, and 55, as indicated by previously ejected card 55, to be engaged by the teeth on sprocket Wheels 23 and 24 and to be thereby advanced through the recording zone which is located directly under the pole pieces 51 of magnets 58, there being one magnet 58 for each element of the code; namely, five in the present embodiment. In Fig. 4 is shown a schematic circuit arrangement for controlling the magnetic recorder according to the present invention. The winding of magnets 58 is connected to ground, and also over conductors El, 62, 63, 64, and 65 to contact tongues 66, 61, 68, 69, and T9 in a key board device wherein the slidable code bars could control the contact tongues 56 to- 10. The contacts H and 12 associated with each of the tongues 66 to m are connected to positive and negative battery 73 and 14, respectively. A universal contact 151s closed for each key operation to connect positive current from battery 13 over conductor 16 to the card stepping magnet 34. The five contact tongues 65 to iii are set for each key operation according to the code to be recorded magnetically on the steel card 19 (or 58). It will be observed that when a record is made, the magnet 34 as well as all of the magnets 55 will be energized at the same time, but magnets 58', however, will be magnetized in one direction or the other according to the code set up on the tongues 66 to ill and produce magnetized spots on the form as shown in Fig. 3. Magnet 34 is always magnetized in one direction only.

Having reference to Fig. 3, a steel. card or form is is shown in plan view. Card is may be a thin sheet of steel such as thinclo'ck spring 4 material, or it may be built up of a sheet of nonmagnetic material and a sheet of magnetic material. Since these plates is are to be stacked, the provision of a nonmagnetic surface on one side is a considerable advantage, although probably not necessary. The character shown at transverse row 11 is the letter A. The number 1 impulse is represented by an upper mark 18, for example, a north pole, and a lower mark 19 representing a. south pole. A spacing condition is represented by opposite marks as, for example, an upper marking 8| representing a south pole and a lower marking 82 representing a north pole in the number 5 position.

Although the present invention has been disclosed in connection with a particular embodiment thereof, it is understood that other equivalent arrangements are contemplated, and that the present invention is limited only by the range and scope of the appended claims.

What is claimed is:

1. In combination, a receptacle for magnetizable record strips, said receptacle having an opening to facilitate withdrawal of said record strips singly, and means cooperably related to said advancing means and said opening for seizing the leading end of a record strip to effect the withdrawal of said strip from said receptacle, said seizing means comprising a rotatable disc having a peripheral notch and a permanent magnet cooperating with said notch, whereby said notch and said magnet are presented cyclically to said opening to magnetically attract a record strip to initiate withdrawal of said strip from said receptacle.

2. In combination, a receptacle for magnetizable record strips, said receptacle having an opening adjacent to the leading edge of the next strip to be withdrawn to facilitate withdrawal of said record strips singly, and means ccoperably related to said advancing means and. said opening for seizing a record strip to eilect the withdrawal of said strip from said receptacle, said seizing means comprising a rotatable disc having a peripheral notch and a permanent magnet REFERENCES CITED The following references are oi record in the of this patent:

UNITED STATES PATENTS 7 Date Number Name 2,247,905 Bryce r July 1, 1941 2,301,199 Bryce et al l Nov. 10, 1942 2,302,002 Bryce Nov. 17, 1942 2,333,463 Bryce l- Nov. 2, 1943 2,431,646 Kenney et a1. Nov. 25, 1947 2,436,829 Roth Mar. 2, 194B

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