US463366A

US463366A - Type-writing machine

Info

Publication number: US463366A
Authority: US
Publication date: 1891-11-17
Anticipated expiration: 1908-11-17

Description

(No Model.)

' G. H. LASAR.

TYPE WRITING MACHINE.

Patented Nov. 17, 1891.

. ja 4 lm wax A-TEN T GODFREY II. LASAR, OF ST. LOUIS, MISSOURI.-

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 463,366, dated November 17, 1891.

Application filed June 1 2, 1889. Renewed October 13, 1890.- Serial No. 368,009. (No model.)

To all whom it may concern:

Be it known that I, GODFREY H. LAsAR, of the city of St. Louis, in the State of Missouri, have invented a certain new and useful Improt ement in Type-Writers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, and in which- Figure I is a detail perspective view showing one end (to the right hand) of the carriage of a type-writer, and illustrating a portion of my present invention. Fig. II is a side view of the ratchet of the platen, which is at the same end, and showing the pawl-spring and stop in section. Fig. III is a top view showing the parts adjacent to the ends of the platen of the carriage in normal position. Fig. lVis an elevation showing the other end (to the left hand) of the carriage. Fig. V is adetail view of the stop located on the carriage-arm for limiting the throw of the lever, and thereby regulating the rotarymovement of the platen. Fig. VI is a detail view showing one of the clip-arms and being a vertical section taken on line VI VI, Fig. III, looking outward.

My present invention relates to certain improvements in type-writing machines; and it consists in features of novelty hereinafter fully described, and pointed out in the claims.

Referring to the drawings, 1 represents the roller or platen of a type-writing machine; 2, the ratchet-wheel secured to the platen or to the spindle or journal 3 of the platen, and t represents an arm arranged horizontally having connection with the frame of the carriage and which has a curved extension 5,

I against which pressure is applied in running the carriage back after a line has been written. Over this arm 4 and extension 5 is a horizontally earranged lever 6, pivoted to the arm at 7, and having an extension 8 in line therewith, forming a pawl or dog that engages the ratchet 2 sidewise. \Vhere such arrangement has been used, it has sometimes been found that in working the machine rapidly the momentum of the platen (when the lever 6 was'moved) would carry it around more than the distance of one notch. To avoid any further difficulty of this kind I secure to the inner endof the lever 6, above the extension 8, a stop plate or arm 9, which extends in, preferably, an upward direction from itspoint of connection with the lever 6 and behind the ratchet-wheel 2. The arm is so connected to the lever 6 as to be operated or moved with the lever. Now each time the lever is operated to turn the platen the arm 9 is broughtinto engagement sidewise with the teeth of the ratchet-wheel, and the parts are so disposed that the arm enters a tooth of the wheel has completed its action, so that it does not interfere with I the operation of the lever. The inner side of the end of the arm is beveled, as shown at 10, soas to fit snugly into the teeth of the ratchet-wheel, as shown by dotted lines in Fig. II. \Vhen the pressure is removed from the lever 6 its inner end 8 is made to engage anothernotch, and the arm 9 is carried out ofengagement with the wheel just as the lever by means of a suitable spring 11, the spring I being preferably secured to the arm 4 at 12 by one end and passing behind a pin 12 in the arm 4 extends inward and embraces the arm 9 at 13. By an arrangement of this kind it will be impossible for the platen or roller to move more than the desired distance at each operation.

14 represents a friction-sprin g for regulatin g the tension of the platen.

15 represents a two-faced stop, pivoted to the arm 4, as shown in Figs. I and V.

16 represents a projection on the end 8 of the lever 6, against which a finger maybe placed to depress this end of the lever out of enga ement with the ratchet 2. i

17 represents a lip formed on the lever 6 and embracing the extension 5 of the arm 4 and serving to hold the lever to the arm, but permitting its free and individual movement.

18 represents a clip pivoted at each end at 19 to the upper ends of-a pair of arms 20, secured one at each end to a rock-shaft 21. The lower portion of each end of this clip is provided with a pin 22, fitting in a slot 23 in each arm 20.

24 represents a lever secured to the rockpassing beneath a pin 28 on the arm 20, and

which bears against the lower end of the arm or against the rock-shaft, either one, as desired. Now when the rock-shat t is moved by the lever Bl to bring the clip 18 down upon the platen or to move it from the position shown in dotted lines, Fig. IV, to the position shown in full lines, the springs 27 will hold the clip against the platen with a yielding pressure, as will be plainly understood, the result being that'the pressure of the clip on the paper when the latter is placed between the clip and the platen is uniform and regular from one end of the platen to the other.

I claim as my invention- 1. In a type-writer, the combination of the platen provided with a ratchet-wheel, a pivoted lever for moving the platen, and an arm secured to and extending inwardly and up wardly from the lever having a free end engaging the ratcllet-wheel when the lever is operated to turn the platen, substantially as and for the purpose set forth.

2. In atype-writer, the combination of the platen provided with a ratchet-Wheel, a pivoted lever for moving the platen, an arm seon red to and extending inwardly and upwardly from the lever having a free end engaging the ratchet'wheel when the lever is operated to turn the platen, and means for returning the lever and arm to normal posi tion, sulistantially as and for the purpose set forth.

3. In a type-writer, the-combination of the platen provided with a ratchet-wheel, a pivoted lever, an arm secured to and extending inwardly and upwardly from the lever, and a spring engaging the arm, said arm having a free end engaging the ratchet-wheel when the lever is operated to turn the platen, substantially as and for the purpose set forth.

4:. In a type-writer, the combination of a platen, a rock-shaft, arms secured to the rockshaft, a clip having a slot-and-pin connection 45 with the arms, springs 27, and a lever 24, all substantially as and for the purpose set forth.

GODFREY II. LASAR. In presence of- EDW. S. KNIGHT, THOMAS KNIGHT.