US2028280A - Typewriting machine - Google Patents

Description

n-' 1936- G. F. HANDLEY TYPEWRITING' MACHINE 2 Sheets-Sheet l Filed Dec. 29, 1934 ATTORNEYS 2 Sheets-Sheet 2 G. F. HANDLEY TYPEWRITING MACHINE Filed Dc. 29, 1934 Jan. 21, 1936.

ATTORNEYS.

Patented Jan. 21, 1936 PATENT OFFICE TYPEWRITING MACHINE George F. Handley, Glendale, N. Y., assignor to Royal Typewriter Company, Inc., New York, N. Y., a corporation or New York 2 Application December 29, 1934, Serial No. 759,779

6 Claims.

of This invention relates generally to new-' and useful improvements in typewriting orlike machinesalthough more particularly to means for removably mounting the platen on the carriage.

W In the patent to: Myers 1,496,940, June 10, i924 there is disclosed arem'ovable platen and a fractional line spacing mechanism for the {platen which are now embodied in one of the Royal Standard machines. The left hand end of the platen is detachably journaled on the associated end plate of the carriage, .a line spacing ratchet wheel is rotatably mounted on saidtend plate, and a separable clutch is inter posed between the ratchet and the platen. yThe right hand end of the platen is provided with an axle which is; journaled in an open ended slot in the associated end plate of the carriage, and a latch of particular construcposition.

tion is pivotally mounted on said end plate for cooperation with an annular groove formed in the axle tothereby retain the platen in working nmongthe several objects of my invention are toprovide aliningvmarks to facilitate the 25" removal and repositioning of the end of the 1 platen adjacent the ratchet wheel, and'to provide a quick retractible bearing for the opposite end of the shaft which: may be easily installed on the commercial carriage without the necessity of slotting the end plate or employing'the latch or forming an annular groove in the platen I axlel as is shown in said Myers Patent l,496,940. J'With these and other'objects in view which .40' 7 writer'carriage and platen'and showing the apwill more fully appear, the nature of the inventionwillbe more clearly understood by following;the description, the appended claims, and the :se'veral views illustrated in the'accompany- 38 wings.' he

*In the -drawings: a

Figure 1' is a plan view of a portion of a type- ,plicationof Y myrinvention a portion thereof being shown in section. l

.Figure zis a planview of the platen.

I Figure 3 is a front elevation of the structure 7 shown insection v Figure 4 is an enlarged section taken; on the shown in Figure l,-certain of the parts being line-4+4 of Figure V3."

; Figure. 5 is an enlarged longitudinal section showing the releasablev clutch between the line Q space ratchet wheel and one'end of the platen.

. exam ,,Figure. 6 is an. end elevation of the platen showing one of, the clutch elements mounted Figure 7 is an enlarged longitudinal section showing the opposite end of the platen and the associated retractible bearing shaft.

Figure 8 is a perspective view of the latch.

Figure 9 is a detail sectional view showing a modified form of coupling.

Referring to, the accompanying drawings, I

have disclosed my invention as being applied tween the end plates 5 and 6 and fixed on the inwardly projecting end is the usual line spacing ratchet wheel l0 and a cup-shaped clutch element vided with an inwardly extending lateral slot I2. The spindle is provided with an axial bore l3 and slidably mounted in this bore is a push rod M. A stop |5 cooperates with the rod l4 through the medium of a finger-piece Hi to limit the outward movement of said rod, the rod be,- ing normally-urged outwardly by a coil spring I 1. Secured to the adjacent end of the platen B is a head l8 having an outwardly extending hollowboss IQ for receiving the inner end of the spindle 8. The boss I9 is provided with an inwardly extending radial slot 20. A; clutch element2| is supported on the boss I8 for movewill be normally coupled so that line spacing movement imparted to the ratchet wheel by the usual line spacing lever will be transmitted to the platen. The clutch disc 2| is provided with a concentric opening 26 to receive the outer end ,of the boss l9, and a split disc 2'! which is attached to the clutch disc 2| is provided with a tongue 21 which propects radially to the cen- Located be-.

The inner end of the spindle is pro- .ter of said'opening. This tongue 21 normally projects through the slot 23 of the boss- [9 and into the slot i2 of the spindle 8 and into position to be engaged by the inner end of the push rod I4. Upon inward movement of the push rod I l, the tongue 21 will be engaged thereby and the clutch element or disc 2! will be moved. inwardly toward the platen to thereby disconnect the clutch element and consequently disconnect the platen B from the ratchet wheel [0 whereby the platen may be freely rotated in either di;- rection. The above construction is all disclosed in the Myers Patent 1,496,940 referred to above. When it is desired to remove the platen, the right hand end thereof will be disconnected from the end plate 5 of the carriage, the right hand end of the platen will then be swung upwardly until the same clears the end plate 5, and the platen can be readily removed from the carriage. It has been found in practice that if the slot 52 is not located at the top of the spindle, more or less resistance is encountered in disconnecting this end of the platen. I have, therefore, provided anindicating mark or line a: on the handwheel 9 and a mark or line y on the adjacent end of the platen B. These marks x, y when in longitudinal alinement will indicate to the operator that the slot if of the spindle 8 is in its uppermost position whereby the platen may be removed with a minimum amount of effort.

The right hand end of the platen B is removably supported on the endplate 5 of the carriage by the following means: The end plate 5 is provided with a closed opening 29 and fitted into this opening and rigidly secured to said end plate is an outwardly extending bearing 39. The adjacent end of the platen B terminates in spaced relation to the end plate 5 and rigidly attached to this end of the platen by means of a flange 3| is a bearing sleeve 0 having a pore tion 32 extending outwardly from the platen toward the end plate 5 and an inwardly extending portion 33 positioned in an axial bore 34 formed in the end of the platen. Normally positioned in the alined bearing 30 and sleeve C is a retractible bearing shaft D for the adjacent end of the platen. By retracting this bearing shaft until the inner end thereof is free from the bearing sleeve (2, the adjacent end of the platen will be freed and the platen can then be readily removed. In order to normally retain the bearing shaft D in its operative position, I have provided a latch connection between the shaft and the sleeve, and associated with this latch is a manually operable means by which the latch may be disconnected from the sleeve whenever it is desired tov retract the shaft for the purpose of removing the platen. To this end the shaft D is: provided with an axial bore 35 which extends inwardly from the outer end thereof, and with a radial groove 36 located intermediate the ends thereof. Located in the bore 35 at a point in register with the groove 36 is a latch 37 which is pivoted at its. inner end by a transverse pivot 38 whereby the outer end of the latch may be swung outwardly in a radial plane to thereby project the outer corner 39. thereof beyond the periphery of the shaft and into engagement with either of two openings 4U, which are formed in the outer portion 32 of the bearing sleeve C and are located at diametrically opposite points in said sleeve. A follower 4H is mounted in the bore 35 of the shaft adjacent the inner end of the latch 31 and a coil spring .52 is located in the bore 35 between the inner end thereof and said follower. This spring functions to yieldably retain the latch 31 in its normal or operative position. The inner end of the shaft D is provided with a slot 43 for receiving a locking pin 44 which is secured to the inner end of the bearing sleeve C to thereby'insure the shaft D turning with the platen B. A handwheel 45 is provided with a hub 45 having an axial bore 41 for receiving the outer end of the bearing shaft D, the hub being fixed to the shaft by a set screw 48. The outer end of the shaft D is disposed in spaced relation to the inner end of the bore 41 to form a recess 49. Slidably mounted in the bore 35 of the shaft is a latch release rod having a reduced outer end 5| which projects outwardly through an opening in the handwheel 45, and attached to said projecting end is a thumbpiece 52. 'Mounted on the reduced end 5i and located within the recess 49 is a collar 53. A coil spring 54 is located within the recess 29 between the outer end of the shaft and the collar 53-. This spring functions to yieldably retain the latch release rod 53 against inward movement. The rod 55 is provided with a coneshaped inner end 55 which normally engages a cam nose 55 formed on the outer endof the latch 31. It will, therefore, be seen that upon inward movement of the latch release rod 55, the latch 31 will be swung inwardly so as to move the corner 39' thereof out of engagement with the opening 40 of the sleeve and thereby permit the shaft D to be retracted from the platen or entirely withdrawn from the bearing 30.

From the foregoing, it will be observed that V whenever it is desired to remove the platen, the

handwheel 9 and the platen B are turned until the indicating marks a: and y are disposed in longitudinal alinement. The latch release rod 5f! is then pushed inwardly against the tension of the spring 54 to releasethe latch from enthe wheel, the platen is turned to place the mark y at the top, the left hand end of the platen is then positioned on the spindle 8 and then the right hand end of the platen is low ered into proper horizontal position, after which the bearing shaft D is inserted, the latch 31 automatically setting itself in either one of the openings 40 to thereby retain the shaft D against displacement.

In the modification shown in Figure 9, I have eliminated the latch 31 and, the associated operating parts, and have provided a bearing sleeve E without the openings 40. The shaft F is provided with a reduced inner end having a transverse slot 59 extending longitudinally from the inner end thereof to form resultant spring clamping arms 60, 6B. The opposed inner faces of these arms are conjointly formed with a transverse seat 5! for receiving the pin 44, the diameter of the seat being substantially equal to the diameter of the pin, and the seat being located intermediate the ends of the slot. Thus when the shaft F is inserted into the sleeve E, the arms 60, 60 will engage the pin 44 and spread V V 2,028,280 slightly until the pin registers with the seat 6| at which time the arms will retract and frictionally retain the shaft against longitudinal movement relative to the platen.

I claim:' I, 1. In a typewriting or like machine, the combination with a typewritercarriage having end plates,one of said plates having a bearing opening therein, a platen having. one end remov- (ably supported by the other side plate, a re- 1 tractible bearing shaft for the opposite end of 1 the platen mounted in said side plate opening, and

a releasable latch mounted onthe bearing shaft for normally coupling the shaft and platen.

; bination with a typewriter carriage having end plates, one of said plates having a bearing openprojecting outwardly beyond said plate, a latch mounted in the inner end of the shaft for noring therein, a platen'having one end removably supportedby the other side plate, a retractible bearing shaft for the opposite end of the platen mounted in said side plate opening and mally coupling the shaft and platen, and manuall'y. operable means mounted in the outer end ;of the shaft for releasing said latch.

3. In atypewriting or like machine, the com- 7 bination with a typewriter carriage having end i Yplates, oneof said plates having a-bearing open- 'ingthereima platen having one end removably supportedv bythe other side plate, a bearing sleeve fixed to'the opposite end; of the platen 'and having a, radial opening therein, a retractible bearing shaft for said opposite end of the platen mounted in said sideplate opening and projecting into said bearing sleeve, and a releasable latch mounted in said bearing shaft and normally, engaging the opening in the sleeve for coupling said, shaft andplaten.

4. Ina typewriting or like machine, the combination with a typewriter carriage having end plates, one'of said plates having a bearing open- 7 ing therein, a platen having one end removably supported 'by the other side plate, a bearing sleeve fixed to the opposite end of the platen and havinga radial opening therein, a retrac tiblebearing shaft 'for said opposite end of the platen mounted in said side plate opening and 2. In a typewriting or like machine, the com- I projecting into said bearing sleeve, a latch pivotally mounted in the inner end of the shaft, a

' spring for yieldably retaining the latch in engagement with the opening in the sleeve, and manually operable means mounted in the outer end of the shaft for releasing said latch.

5. In a. typewriting or like machine, the combination with a typewriter carriage having end plates, one of said plates having a bearing opening therein, a platen having one-end removably supported by the other side plate, a bearing sleeve fixed to the opposite end of the platen and having a radial opening therein, a retractible bearing shaft for said opposite end of the platen mounted in said side plate opening and projecting into said bearing sleeve, a latch pivotally mounted in the inner end of the shaft, a spring for yielda-bly retaining the latch in engagement with the opening in the sleeve, a manually operable latch release push and having a radial opening therein, a retractible bearing shaft for said opposite-end of the platen mounted in said side plate opening and. projecting into said bearing sleeve, a latch pivotally mounted at its inner end in the inner end of the shaft, a spring for yieldably retaining the latch in engagement with the opening in the sleeve, the outer end of the latch being provided with a cam nose, a manually operable latch release push rod mounted in the outer end of the shaft for longitudinal movements relative thereto, the inner end of the rod being cone shaped to engage the cam of the latch, and a spring mounted in the shaft and cooperating with the rod for yieldably retaining the latter in ineifective position.

GEORGE F. HANDLEY.

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