US2362029A - Typewriting machine - Google Patents

Description

N0V 7, 1944 l A. B. sCHUYLER 2,362,029

TYPEWRITING MACHINE Filed May 18, 1942 Patented Nov.7, 1944 UNITED! .STATES PATENT oFFicE 'rrrswm'rmc MACHINE Albert B. Schuyler, Rochester, N. Y., assigner tti International Business Machines Corporation, New York, N. Y., a corporation oi' New York Application May 1s, 1942, serial No. 443,229?. 4 claims. iol. 1er-ss) Other objects of the invention will be pointed out in the following description and claims and illustrated in the accompanying drawing, which l disclose, by way of example, the principleof the invention andthe best mode, which has been contemplated, of applying that principle.

In the drawing:

Fig. 1 is a plan view of the marginal stop setting mechanism as viewed from the rear of the machine.

Fig. 2 is a rear elevation.

Fig. 3 is an elevation of a portion of the. right hand end of the carriage with certain parts in section.

Fig. 4 is a view similar to Fig. 3, 'but showing certain 0f the parts in the operated position.

Fig. 5 is a vertical longitudinal section of the left hand marginal stop.

The numeral IU in the drawing designates the side plates of a typewriter carriage which are rigidly joined together by a channel-shaped member I I, which is formed with grooves to accommodate the usual anti-friction roller trucks I 2 by means of which the carriage is supported upon the rails. In Figs. ll 2 and 3 the reference numeral I3 designates the usual rear rail.

` Mounted between the side plates Ill of the carriage is the marginal stop' rack I4 having its upper edge provided with teeth to'correspond with the teeth in the usual escapement rack (not shown). Slidably mounted on the escapement rack I4 is the right hand marginal stop I5 and the left hand marginal stop I6 which determine the right and left hand margins respectively of a work sheet. The marginal stops I5 and I6 are similarly constructed but their corresponding parts are symmetrically located with respect to the center oi the carriage; accordingly, a description' of one will suiiice for both.

In Fig. 5 there is shown in vertical section the left hand marginal stop I6. This stop comprises two` side pieces I6a in the form of at plates' which are spaced apart by a stop block Itb and s spacer block IGc, these parts being located below and above the edges of the marginal stop rack I4, the block I6c riding upon the tips of teeth on the rack. Pivoted on a rivet I6d, between the plates Isa, is a marginal stop latch block IBe which is cut away to accommodate the spacing block IBc. y site the pivot iSd is formed with a number of teeth I6f corresponding to the teeth in the rack I4 and also has a pin |69 to which is anchored a spring I6h. This spring is anchored to a p in |61' most clearly shown in Fig. 3 attached to one of thev plates Ilia and normally holds the toothed por- I tion I6) in engagement with the teeth of the rack I4. Fig. 5 shows the latch block in disengaged position while the other views show the latch block in engaged position locking the marginal stops to the rack I4. The parts of the right hand marginal stop I5 are designated with the numeral I5 and the corresponding letters where these parts are visible in the drawing. The pins 15g, IBg are provided with mushroom shaped heads I5?, |67' for a purpose to be made clear later. During the operation of typing, the marginal stops I5 and I 6 remain locked to the rack I4 and by their position determine the extent of carriage travel in the usual way. 4

- For the purpose of releasing the marginal stops and resetting them to a new position without lifting thepaper table and reaching behind it to change the position of the stops, there is provided means including an operating handle within con venient reach of the loperators right hand. This setting means includes a shaft I1 journaled in the carriage side plates I0 and extending parallel with the rack I4 and a'short distance to the rear thereof. Secured to this shaft I1 is a universal bar in the form of an angle strip I8, the wider face portion of which extends with its edge underneath the heads IS7',- ISy' of the pins I5h, Ish.- At its right hand end, that is the left hand end with reference to Figs. 1 and 2, the shaft l1 is provided with an arm I9 having a pin 20 extending into a radial slot in an operating lever 2l which is pivoted on a stud 22 carried by the right hand side plate I0 of the carriage. posed betweenthe stud 22 and the pin 20 is a Wishbone spring 23 which in Fig. 3 tends to push the pin 20 radially of the stud 22 and thereby tends to urge the shaft II and universal bar in a counterclockwise direction (Fig. 3). However, this movement is limited by a stop stud 24 on plate I0 which works in a notch formed inthe arm I9, the pin 24, in the position of Fig. 3, engaging the side of the arm I9, while in the posi- The end of the latch block I6e oppol Inter- 4 the enlargement |57',

tion of Fig. 4, a projection |9a formed by the notch in the arm I9, limits clockwise rotation of the shaft lli by engagement with the pin 24. Thus, spring 23 acts like a toggle spring to hold the operating arm or lever 2| in either of its set positions.

The side plates I5a, |6a and the stop blocks I5b, I 6b of the marginal stops are shaped for cooperation with the lug 25a v(Fig. 2) formed in thetabular lever 25 to limit the carriage movement according to the position of the marginal stops. This tabular lever or its equivalent is a usual element in a typewriter and may be of the same form as the che disclosed in Patent No. 1,935,436. However,l any other suitable stop member may be employed for the same purpose. As usual, the member 25 may be coupled in some manner to a marginal release key (not shown) to permit the lug 25a to be moved from the path of the stop blocks on the marginal stops to enable the carriage to be moved beyond either of the marginal positions when necessary.

When the right hand marginal stop I5- is brought into engagement with the lug 25a, by moving the carriage toward the right hand marginal position, that is to the right in Figs.r l and 2, the pin |5h is brought directly underneath a notch 26a formed in a plate 2S secured to a bracket 2l which is fastened to the top of the rear rail I3. On the other hand, when the left hand marginal stop I6 is similarly brought into engagement with the lug 25a the pin 66g will be brought underneath a second notch 26h (Fig. 2) in the plate 26.

If it is desired to reset the right hand marginal stop I5 the carriage may be moved by hand to the right hand marginal position, that is to the right in Figs. l and 2, as far as it will go as determined by the position of the marginal stop I5 on the rack I4. The lever 2i may now be grasped with the right hand and rocked from the position of Fig. 3 to the position of Fig. 4. This will cause the shaft Il and the universal bar I8 to rock clockwise and the edge of the wider face of the angle strip, by contacting |631, will lift bothA latch blocks |5e, IBe to the position shown in Fig. 5 for the left lhand marginal stop. This causes the pin |5g to enter the notch 26a. If now the carriage is moved to right or left with reference to Figs. 1 and 2, the marginal stop I5 will be held against movement and will slide relative to the rack I. If it is desired to move the marginal stop nearer the edge oi the paper so as to increase the length of the line, the carriage will be moved to the right, in Figs. 1 and 2 thereby bringing the left hand plate I in Fig. 2 nearer to the marginal stop I by the required amount. With the carriage held stationary the lever 2| is now pushed back to the position of Fig. 3,

thereby allowing the latch block |59 to again lock the marginalstop IB to the rack I4. While of operation since the operating lever for universal bar I8 is located on the right hand end of the carriage foroperation by the right hand operator. In the usual operation of a typewriting machine, it is most natural to move the carriage with the right hand since the right hand is usually more dextrous than the left. Since the hand is usually used to move the carriage in resetting the stops, it is more convenient to have the operating lever or key for controlling the stop setting mechanism located at the point where the hand naturally must be placed to move the carriage. When the stops are set by a mecha nism controlled by a, key adjacent the keyboard both hands must be used or a double movement of one hand is necessary.

Since there are few operating parts in the mechanism, no appreciable extra weight is placed on the carriage. Also no internal connection from the keyboard to the rear of the machine is necessary as is the case when the stops are released by a key adjacent the keyboard. Another advantage is that no springs are needed to draw the marginal stops to the center position prior to moving the carriage to a new position in setting the stops.

It will be readily apparent therefore that the stop setting mechanism disclosed herein has many advantages over prior art structures which are usually more complicated and less convenient to use.

While there has been shown and described and pointed out the fundamental novel features of the invention as applied to a single embodiment, it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention therefore to be limited only as indicated bythe scope of the following claims.

I claim:

l. In combination with the carriage of a typewriting machine, a marginal stop rack mounted on the carriage; right and lei't hand marginal n stops slidably mounted on said rack, each of said the latch block |6e is also raised by the foregoing until the lpin |69 registers with ythe notch` 26h before operating the lever 2|.

One of the advantages of the stop setting means disclosed herein is its simplicity and ease stops including a latch member for locking the marginal stops to the rack, each of said latch members carrying a pin for releasing its latch member; means common to both marginal stops and engageable with both of said pins to disengage said latch members from said rack, an

operating member for the disengaging means,

and means operative when either oi' the-latch members are -released with the marginal stops in kthe margin defining position to engage the pin for the released latch member and hold the marginal stop for the released latch member against movement while the carriage is moved to a new marginal position.

2. In combination with the carriage of a typewriting machine, a toothed marginal stop rack; marginal stops slidably mounted on said rack, each of said marginal stops having a pivoted latch block provided with a toothed portion engaging the teeth in said rack, said toothed portion being provided with alatch releasing projection; a universal bar mounted on the carriage and extending parallel with the marginal stop rack and operatively engageable with said projection. said universal bar when moved engaging said pro'- jection to disengage said latch blocks from the rack; and means, into engagement with which the projection on either latch block may be .'movement ot the carriage moved by the universal bar when the carriage is in either-margin denning position, to hold the marginal stop dening such position against movement and thereby enable the carriage to be moved to a new marginal position.

3. In combination with the carriage of a typevwriting machine, a toothed marginal stop bar,l a marginal stop siidably mounted on said bar, said marginal stop having a pivoted latch block provided with a toothed portion engaging the teeth oi said rack and spring means to urge the latch block into engagement with the rack,.said latch block having a projection by means of which the latch block may be lifted out of engagement with the rack and also having a locking projection, a universal bar pvotally mounted inthe carriage and engaging the iirst named proyjection, a lever for operating the universal bar to rock the latch blocks out of engagement with the rack, and a locking plate adapted to receive 'th locking projection of the marginal stop when the latch block is disengaged from the rack with the carriage in its marginal position to permit to a new marginal position.

4. In combination with the carriage of a' typewriting machine, a support mounted on the carriage and extending parallel with the line of travel oi' the carriage; marginal stops adjustably slidably mounted on said support, each of said.

stops including a member movable relative to the stop to lock the stop in its adjusting position along said support, each member being releasable for adjusting the stop along said support and including a releasing and locking element xed to such member; a universal bar movably mounted on the carriage and extending parallel with said support, said universal barengaging the element fixed on the locking members and, when moved, releasing said members to enable the marginal stops to be adjusted along said support; manual operating means for moving the universal bar, and means engaged by said elements when the universal bar is moved by said operating means with the carriage in a given margin dening position to hold the corresponding marginal stop immovable to permit movement of the carriage relative to the marginal stop to a new marginal position. Y l

.- f ALBERT B. SCHUYLER

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