US1401653A - Device to graduate the distance of the lines of typewriting-machines, specially for writing on ruled paper - Google Patents

Description

B. SHATZ.

DEVICE T0 GRADUATE THE DISTANCE OF THE LINES 0F TYPEWRITING MACHINES,

SPECIALLY FOR WRITING 0N RULED PAPER.

APPLICATION FILED APR. 10, 1920.

1,401,653. Patented Dec. 27, 1921..

BARNETT SHATZ, OF BUENOS AIRES, ARGENTINA.

DEVICE TO GRADUATE 'I'EE DISTANCE OF THELINES OF TYPEWRITING-MACiHIId'ES,

. SPECIALLY FOR WRITING- ON' BULED'PAPEB.

Specification of Letters Patent.

Application filed April 10, 1920. Serial No. 872,940.

To all whom it may concern:

Be it known that I, BARNETT SHATZ, a citide 13y gra ually facilitating the work and rendering the regulation of the line spacing interval easy and rapid.

It is of course well understoodthat in typ ing machines as ordinarily constructed, the

. spacing of the lines is effected by the engagement of a pawl with the teeth of a ratchet-wheel, three spacings being ordinarily provided, which are known as single, double and trlple spaces. My improved mechanism is designed to provide greater variation in the line spacing than in lines employing the ordinary three spacings. Should it be required to. space irregularly, however, as in filling in blanks, or should a spacing be required other than the three arbitrary spacings provided by the spacing devices now generall in use, or should it be desired to approxlmately fill a sheet of limited size with a certain number of lines which would not correspond with either of the three arbitrary spacings provided ordinarily, it would be necessary to throw off the ordinary spacing mechanism and space each line by guess work by rotation of the platen, and frequently to shift the paper relatively to the platen. It is also desirable at times to accurately space the printing on ruled sheets of paper and this may be accomplished by my improved mechanism.

A further object of the invention is to provide line spacing mechanism for typewriting machines which may be manufactured at small cost and be readily assembled, and which may .be quickly set for any desired width of spacing.

With the foregoing objectsoutlined and with other objects in view which will appear as the description proceeds, the invention consists in the novel features hereinafter descr bed in detail, illustrated in the accompanylng drawing and more particularly pointed out in the appended claims. Referring to the drawing F igure 1 is an end view of a type-writer carriage having my improved mechanism attached thereto,

Fig. 2 is a front view of the same end of the typewriter carriage with my mechanism applied.

Fig. 3 is a view of my improved mechanism taken from the opposite side from that shown in Fig. 1, and showing the mechanism in normal position.

Fig. 4 is a view similar to Fig. 3 but showing the mechanism during operation.

11 the drawing, 1 designates a line space wheel provided with a gear toothed periph ery. This wheel is fixed on one end portion of the platen spindle 24 which carries the usual platen roller 19. A bell-crank lever having arms 2 and 3 is rotatably mounted on the spindle between the wheel 1 and the adjustable collar 32 which is held in place by the ordinary spindle-head 31. The arm 2 of the bell-crank carries a swinging pawl 5 which is pivotally mounted'on a fulcrum screw 8, and a leaf spring 6 is fixed to the arm 2 and engages the pawl 5 for normally maintaining the same out of engagement with the teeth of the wheel 1. A stop surface 4 is provided on the arm 2 to limit the movement of the pawl in the direction in which it is forced by the spring 6. The pawl is swung in one direction in order to engage the teeth of the wheel 1, by means of a pm 15 carried by a push-rodor bar 14 which is slidably mounted in one end 25 of the type writer carriage. When the rod 14 is reciprocated the pin 15 will strike the upper portion of the pawl and will cause the same to swing on its axis and engage the teeth of the wheel 1. Then the wheel-will turn with the pawl.

The turning movement of the bell-crank is limited in one direction by means of a fine pitch threaded screw 9 which engages a fixed nut 12 that is secured to the end plate 25 by means of a screw 13. The lower end of the arm 3 of the bell-crank is designed to engage the screw 9 which acts as Patented Dec. 2'7, 1921.

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a fixed stop for the bell-crank and as fine adjustments may be made by the screw 9, the adjustment of the wheel may be made very minute. The screw 9 is provided, with a knuckled knob 10 designed. to be engaged by the operator for adjusting the screw, and a combined gaging and locknut 11 is mounted on the screw 9 between the head 10 and the fixed nut 12. The nut 11 may be used to lock the screw in any fixed, position or it may be utilized to insure that the screw occupies a particular position at all times. lln other words, the screw 9 may be adjusted from its position shown in Fig. 1 by unscrewing said screw and this w1ll cause the tightening nut 11 to rise w1th the screw. Then if the nut 11 is permitted to remain in its original position relatively to the crew 9, the screw may be accurately brought back to its original positlon by lowerlng the screw until the nut 11 engages the fixed nut 12. This is a desirable feature in many instances as the screw 9 may be raised to ermit say single pacing for a greater or ess portion of a page and then the screw may be lowered to bring the nut 11 back to its original position and the mechanism will then half-space or the like.

The push rod 14 is provided with a hand engaging head 18 desired to cooperate with the fixed stop 25 for limiting the rearward movement of the push rod. The push rod also has a stop pin 29 which projects from the opposite side of the rod from that of the pin 15 and which is designed to cooperate with a fixed stop 30 on the end plate of the frame to limit the outward movement of the push rod 14. A coil spring 29 having one of its ends secured to a pin 17 carried by the push rod and its other end connected to a fixed member 21 on the end plate 25, functions to limit the push rod to.

its non al L )sition. A second coil spring 22 fixe rt 23 to me rut 12 and at 28 to the arm 3, i designed to yieldingly hold the arm 3 in engagement with the lower end of the screw 9 and to return the bell-crank to its normal position after it has been turned by the pin of the push rod 14.

A cross-shaped leaf spring 26 is fixed by clips 27 to a sleeve 16 mounted on the spindle 24, and functions to maintain the wheel 1 in a definite position.

From the foregoing it will be seen that the adjustment of the screw 9 will enable the platen roller 19 to be shifted various amounts depending on the desire of the operator. When the operator adjusts the screw 9 to the position desired, the push rod 14 may be operated and this will cause the pin15 to rock the pawl 5 on its fulcrum until said pawl engages the teeth of the line space wheel 1. Then the line space wheel, pawl and bell-crank will turn in unison upon the spindle 24 until the hand engageoneae ing member 18 strikes the stop 25. 'When the operator releases the push rod, the spring When the rod 14 is pushed rearwardly it will travel in the direction of the arrow b shown in F ig. 4 and the line space Wheel will travel in the direction of the arrow a in said figure.

From the foregoing ll believe that the construction and operation of my improved mechanism will be clearly understood by those skilled in the art and I am aware that Various changes and modifications may be made in the construction shown without departing from the spirit of the invention as expressed in the following claims.

I claim- 1. lin a type-writer, the combination with a platen roller and its spindle, of a toothed wheel fixed to said spindle, a bell-crank lever loosely mounted on said spindle and provided with a pawl designed to engage the teeth of said wheel, means for normally maintaining said pawl out of engagement with the teeth of said wheel, a push-rod having a pin engageable with said pawl to cause the pawl to grip the teeth of the wheel and to turn the Wheel and platen roller when the push-rod is operated, and an adjustable screw engageable with the bell-crank lever for limiting the oscillating movement of said bell-crank lever in one direction.

2. In a type-Writer, the combination with a platen roller and its spindle, of a toothed wheel operatively connected to said spindle, a movable member carrying a pawl engageable with the teeth of said wheel for causing turning movement of the wheel and platen roller, an operating member engageable with said pawl for causing the same to turn said wheel, an adjustable screw engageable with the first mentioned member for limiting its movement in one direction, and an adjustable stop carried by said screw for use in gaging the extent of movement of the first mentioned member.

3. In a type-writing machine, the combination with a platen roller and its spindle, ofa fine toothed wheel fixedly mounted on said pindle, a bell-crank lever pivotally mounted on the spindle, a pawl pivotally mounted on one arm of said bell-crank lever, a spring carried by said arm and engageable with the pawl for normally holding the sameout of engagement with the teeth of said wheel, a slidably mounted push-rod having a pinengageable with said pawl for shifting the same about its fulcrum and causing it to engage the teeth of said wheel, a spring for returning the pushrod to its normal position, a second spring for returning the bell-crank lever to its normal position, and an adjustable screw engageable-with the other arm of said bell- In testimony whereof he ha signed his crank lever for llmiting the movement of name to this specification in the presence said bell-crank lever in one direction. of two subscribing witnesses.

4. A combination of the kind defined by BARNETT SHATZ. claim 3 in which the adjustable screw is pro- Witnesses: vided with a combined gaging and look A. CARRAZZOY,

nut. RIGHD. Hows'r;

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