US1888623A - Tape pulling device - Google Patents

Description

Nov. 22, 1932. R. L. DAINE A1,388,623

I TAPE PULLING DEVICE Filed May 13 1926 Patented Nov. 22, 1932 ROBERT LOUIS DAINE, OF NEW YORK, N. Y.

TAPE PULLING DEVICE Application filed May 13,

This invention relates to a tape pulling device or tape puller as it is commonly called. The device is adapted for use in various s1tu ations but particularly to pull a ticker tape 5 across a projection position in the manner described in my Patent No. 1,664,772, April 3, 1928. Such devices have been operated by electric motors of the series type, a series motor being particularlyv advantageous because of the fact that it is subjected to a great number of starts and stops. In order to prevent excessive speed of operation of the motor and its consequent vibration, it has been the custom to insert in the motor a circuit of relatively high resistance. For example, in order to maintaina motor at a speed not exceeding 1,800 revolutions per minute, it has been customary to employ a resistance of approximately 350 ohms. While this arrangement maintains the speed of the motor below the desired maximum, nevertheless it also decreases the voltage impressed upon the motor, thus causing it to operate near the critical point. The result is that, when oil or dust is deposited upon the commutator, the motor will sometimes fail to start.

Therefore, the object of my invention is to provide a tape puller operated b a motor and so arranged that the speed may e kept below 0 a desired maximum without reducing the impressed voltage, thereby eliminating the trouble described above. This object is achieved by inserting a shunt resistance across the armature of the motor. This resistance acts as an automatic speed regulator and by a proper choice of resistance, the speed may be maintained below the desired maximum. -The speed may be further regulated bv means of an adjustable resistance placed in the circuit.

A further object of my inventionis to provide an arrangement of tape puller and reel, or equivalent, to neceive or control the tape which shall maintain the tape atan approxinately uniform tension and which shall maintain'the speed of movement of the tape substantially uniform.

In the accompanying drawing in which I have shown a selected embodiment of my invention:

Figure 1 is a front elevation of a tape 1928. serial No.1o8,775.

puller as applied to a projector for use with a ticker tape.

Figure 2 is an end elevation of the device shown in Figure 1 as viewed from the right of that ligure.

Figure 3 is a wiringdiagram showing the circuit for operating the motor.

The tape 1, in the embodiment shown is ejected from a stock ticker A and formed into aloopl2, after which it is fed across the projection position indicated by a support 3, this feeding movement being achieved by a sprocket wheel 4 operated by suitable gearing from an electric motor 5. The gearing is enclosed in the casing 6 and may be of any suitable character.

After leaving the sprocket wheel 4the tape passes around an idler roll 7 and is suitably drawn from said sprocket wheel 4, for example, as shown when-ein it is wound upon a reel 8. The diameter of the rolled tape will vary and consequently the peripheral speed of the tape will. increase asthe diameter of the roll increases. Therefore, I have provided a slip connection between the motor and the reel, this connection being exemplified by the belt 9 which is preferably in the form of a coiled spring and which is trained over the pulleys 10 and 11. The pulley 10 may conveniently be mounted upon an extension of theshaft 12 which carries the sprocket wheel 4. and the pulley 11 is mounted upon a shaft 13 which carries at its other end the reel 8. The shaft 13 and idler roll 7 may be conveniently .mounted in a frame 14 adapted to be secured to the'end of the gear casing 6. f y

Supported in the loop 2 is an arm 15 one en-d of which is pivoted at 16. The arm 15 forms a switch controlling the operation of the motor 5, the pivot being connected to the conductor 17 and the armcarrying a contact v18 adapted to engage the fixed contact '19 which in turn is connected to the conductor 20. I

Then it is obvious that the circuit of the motor will be opened and closed by variations in the rloop 2 in the manner fully ,set forth in my aforesaid patent. Because of the numerous startings and stoppings of the motor, a series motor is employed. In order to avoid the disadvantages referred to above the armausual source of power for operating the motor.

In operation the resistance 22 is so selected that the amount of current passing through the armature is sufficient' to give the desir-ed maximum speed. The resistance thus acts as an automatic regulator of the speed of the motor. The speed may be further regulated` as stated above by the adjustable resistance 24. The motor operates in the man- -ner set forth in my aforesaid copending application, the switch being opened and closed by variations in the loop 2. The tape is fed across the projection position byv means of a tape puller and is wound upon the reel 8 at a substantially constant speed. The belt 9 will slip as the roll of tape on the reel increases in diameter and, therefore, the speed ofthe tape remains substantially constant.

l I am aware that various changes will occur to those skilled in the art and that such Y vchanges may be made without departing from thel scope of my invention. I thereforedo not intend to limit myself except by the appended claims.

1. In combination, a stock ticker from which a printed tape is ejected intermittent'- ly and at an irregular rate, a projection field, a motor, means operated by said motor for pulling said tape through said projection `field, a reel for receiving said tape after passage thereof beyond said means, there being a tape loop between said projection field and said ticker which changes in configuration when said ticker and the tape-pulling means operate in non-synchronous relation with respect to each other, means whereby the operation of said'tape-pulling means is discontinued in response to decrease in configura# tion of said tape loop, and-means forming a driving connection between said motor'and reel, said motor, by said driving connection, rotating saidreel at pro essively decreasing speed as, the tape roll t ereon progressively lncreases in size.

2. In combination, a. stock ticker from which a printed tape is ejected intermittently and at an irregular rate, aprojection iield, a motor, means operated b said motor for pulling said tape throug said projection field, a reel for receiving said tape lafter passage thereof beyond said means, there being a tape loop between said projection field and said ticker which changes in configuration when said ticker and said motor operate in non-synchronous relation with respect to each other, means for discontinuing the oneration of said motor in response to decrease in configuration of said tape loo and means forming a drivingv connection tween said motor and reel, said motor, by sald dr1v 1ng connection, rotating said reel at progresslvely decreasing speed as the tape roll thereon progressively increases in size.

3. In combination, a stock ticker` from which a printed tape is ejected intermittently and at an irregular rate, a projectlon field, al

motor, means operated by said motor for pulling said tape through said projection eld, there being a tape loop between sald projection eld and lsaid ticker which changes in configuration when said ticker and the tape-pulling Vmeans operate in non-synchro-l nous relation with respect .to each other,

means whereby the operation of said tape# pulling means is'discontinued in response to decrease in configuration of said ta e loop, and means for drawing the tape a 'r passage thereof beyond said pulling means, the operation of said drawing means being discontinued substantially-coincidentally withl discontinuation of operationrof said pulling means, and the tape section between said drawing and pulling means remaining taut.`

4. In combination, a stock ticker from which a printed tape is ejected intermittently and at an irregular rate, a projection field, a

motor, means operated by said motor for v pulling said tape through said projection iield, there being a tape loop between said projection ield and said ticker which changes in configuration when said ticker and the tape-pulling means operate in non-synchronous relation with respect to each other, means whereby the operation of said tapepulling means is discontinued in response to decrease in coniguration of said tape loop, and lmeans operated by said motor for drawing the tape after passage thereof beyond said pulling means, the operation of said drawing means being discontinued substan4 tially coincidentally with discontinuation-of operation of said pulling means and the tape section between said drawing and pulling means remaining taut.

In testimony whereof, I have aiixed my signature to this specification.

ROBERT LOUIS DAINE.

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