US564699A

US564699A - Platen-shift for type-writing machines

Info

Publication number: US564699A
Authority: US
Publication date: 1896-07-28
Anticipated expiration: 1913-07-28

Description

(N Modem 2 Sheets- Sheet 1.

W. P. KIDDBR. PLATEN SHIFT FOR TYPE WRITING MACHINES.

No. 564,699. Patented July 28, 1896.

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2 Sheets-Sheet 2.

ATTORNEY.

(No Model.)

w.-P. KIDDER. V PLATEN SHIFT FOR TYPE WRITING MACHINES.

Patented July 28, 1896.

WITNESSES:

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' UNITED STATES PATENT OF ICE.

\VELLINGTON P KIDDER, OF BOSTON, MASSACHUSETTS.

PLATEN-SHIFT FOR TYPE-WRITING MACHINES.

SPECIFICATION forming part of Letters Patent No. 564,699, dated uly 28, 1896.

Application filed November 16, 1894. Renewed April '7, 1896. Serial No. 586,608. (No model.)

To all whom it may concern.-

Be it known that I, WELLINGTON P. KID- DER, of Boston, in the county of Sufiolk and State of Massachusetts, have invented a new and useful Improvement in Platen-Shifts for Type-Writing Machines, of .which the following is a specification, reference being had to the accompanying drawings, in which Figure 1 is a top plan view of so much of one form of a type-writin g machine as is necessary to show the nature of my invention, my improvement being attached. Fig. 2 is a side view illustrating my invention and is partly in section on line 2 2 of Fig. 1. Figs. 3, 4, and 5 are detail views,,partly in section, on line 3 3 of Fig. 1 and show, respectively, a part of the platen-frame in its normal, intermediate, and lowest position for impression, my movable stop being in the platenshifting path in Figs. 3 and 4 and out of that path in Fig. 5.

The object of my invention is to produce a cheap, simple, and efficient mechanism by manipulation of which a sidewise-shifting platen is brought into position to receive impression from any desired type-face on a typehead.

My invention consists, mainly, in a combination, a new element of which is a stop that is swung into and out of the path of the platen when the platen is shifted, the function of the swinging stop being to arrest the platen in an impression position between its normal and extreme impression positions in order that the platen may be moved by a single-shift key from a normal position to a plurality of new printing positions in the same direction, one in advance of the other, corresponding with the positions of the several types on the typeheads.

In the drawings, 1 is a platen movable both endwise and sidewise in the usual manner. Platen-frame 2 reciprocates in grooves 3 of carriage 4: and is provided with a lengthwise groove 5, the platen-frame being .kept normally in its highest position, as shown in Fig. 2, by stress of spring 6, against the force of which the platen is vibrated or shifted into each of its other impression positions.

For shifting the platen from its normal or highest impression position to its other impression positions, I employ a double rockerarm 7, roll 8 thereon moving in groove 5, so that the platen-frame 2 and rocker-arm 7 are mechanically connected. Rocker-arm 7 is fast on rocker-shaft 9, journaled in the f ramc of the machine and provided with an arm 10, recessed at 11 to receive the end of the rockerarm 12 from rocker-shaft 13. When platenframe 2 is in its highest position under the stress of spring 6, one arm 14 of the double rocker-arm 7 engages an abutment 15, Fig. 3, so that the platen-frame is limited in its tendency to move upward, but of course the upward movement of the platen-frame under the stress of spring 6 might be arrested by any other suitable stop. Rocker-shaft 13 is provided with a shift-key l6, and movement of this key causes the roll-carrying arm 14 of rocker-arm '7. to move downwardly, so that the platen-frame 2 is moved away from its normal position against the force of spring 6. When the roll-carrying arm 14 of the double rocker-arm 7 strikes against the abutment 17, it arrests the platen at its extreme shift-able position from the normal. Its said normal position is of course one extreme impression position and its extreme shifting position from the normal is another impression position, and at each of these positions the platen is held for impression positively, owing to the contact, respectively, of one arm 14 of double rocker-arm 7 with abutment 15 and of its other arm-14 with abutment 17.

In its normal position the platen is in place to receive impression from type a (for'example) on type-head 18, and in its lowest position from type c. To arrest the platenframe 2 positively at its intermediate impression position, to receive impression of type b, the movable stop 19 is employed. The normal position of this stop 19 is preferably in the shifting-path of the platen-frame, as shown in Fig. 4, and stop 19 is moved out of this path when the platen is moved to its lowest position. (See Fig. 5. Stop 19 is carried by a swing-bar 20, pivoted at 21 to the frame of themachine and havingan upturned end 22, which is pressed outwardly from the opposed portion of the machine-frame by a spring 23, this spring tending to keep the farther or stop-carrying end of the bar in the path of the platen between the extreme impression positions, as already explained and as in- 'utilize the shift-key'16 not only for rocking shaft 13, butalso for moving the stop-carrying bar 20. That is a single, and one and the same, key 16 is both a shift-key and a shiftcontroller. To accomplish this, key 16 is not only so connected with shaft 13 as to serve as a rocker-arm therefor, but is so mounted in the machine'thatit moves the stop carrying bar 20 at the will of the operator to swing stop 19 out of the path of the platen, being, in order to attain this object, conveniently hinged at 24 to a bracket 25., fast on shaft 13. Bracket 25 is preferably formed with an arm 26, with which a latch 27 engages by either

tooth

28 or 29 to lock the rockashaft 13, (through bracket 25 and its arm 26,) and con sequently the platen, in any desired impression position. Latch 27 is held normally out of position for engagement with arm 26 by a spring 30. When thelatch 27 and arm 26 are brought together, the tendency of the parts is to pull apart, and the force then exerted is sufficient to keep them'locked together.

In ordinary operation of the machine, the shift-key is depressed in the usual manner it; it be desired to shift the platen from its upper or normal position to its next lower or intermediate impression position; but if a shift to the lowest impression position is desired the operator pushes the shift-key downwardly and sidewise, and the object is attaijned.

[It will be plain to all mechanics that my construction may be varied in several mechanical details Without departing from my invention.

The abutments 15 and 17 are each provided with an adjustable portion 31, best formed of a set-screw, as shown, so that the platen may be shifted into the exact position required by adjustment of the abutments when the parts become worn.

What I claim is- 1. In a type-writing machine, the combination of a vibrating platen; a carriage therefor; and a type-head having a plurality of type, with stops for arresting the platen in two of its impression positions and a movable stop for arresting the platen in another of its impression positions, said movable stop being connected with and under the control of a key, substantially as and for the purpose set forth.

2. In a type-writing machine, the combination of a vibrating platen and a type-head having a plurality of type with platen shifting and stopping mechanism, and a shift-key having a duplex movement, one to actuate the platen-shifting mechanism, and the other to actuate the platen-stopping mechanism,

the stopping mechanism comprising a lever which is engaged by the shift-key to swing its stop end into the path of the shifting platen, substantially as and for the purpose set forth.

3. In a type-writing machine, the combination of av shifting platen; platen-shifting mechanism; a type-head having a plurality of type; a platen shift-key and a swinging bar carrying a stop for the platen, said key being adapted to engage said stop-carrying bar, whereby the swinging bar is moved to swing the stop into the path of the platen as it shifts from its normal printing position for another printing position, substantially as and for the purpose set forth.

4. In a type-writing machine, the combination of a shifting platen and a swinging stop therefor on amovable bar; ahinged key adapted to engage said bar to swing it; and

platen-shift mechanism with which said key is connected to actuate it, substantially as described.

5. In a type-writing machine, the combination of a shifting and longitudinally-traveling platen; a type-head having a plurality of type; a single shift-key; mechanism substantially such as described for connecting the shift-key with the platen; a swinging platen-stop; the shift-key being movable sidewise to cause the swinging platen-stop to move into the path of the platen when the shift-key is moved to shift the platen from one impression position to another, all substantially as and for the purpose set forth.

6. In a type-writing machine, the combination of a shifting and longitudinally-traveling platen; a type-head having a plurality of types; a single shift-key; mechanism, substantially such as described, for connecting the shift-key with the platen to move it from its normal positon to a plurality of new printing positions in the same direction,one in advance of the other, corresponding with the'positions of theseveral types on the typeheads', a complete movement of the key shifting the platen from its normal position to its extreme print-ing position; and a movable stop adapted to be moved into the path of the platen between the normal and extreme printing positions thereof by a supplementary motion of the shift-key, all substantially as and for the purpose set forth.

WVELLINGTON P. KIDDER.