US1058815A

US1058815A - Type-writing machine.

Info

Publication number: US1058815A
Application number: US60573211A
Authority: US
Inventors: Samuel William Turner
Original assignee: YOST WRITING MACHINE CO
Current assignee: YOST WRITING MACHINE CO
Priority date: 1911-01-31
Filing date: 1911-01-31
Publication date: 1913-04-15
Anticipated expiration: 1930-04-15

Description

S. W.'TURNER.

TYPE WRITING MACHINE.

APPLIOATION FILED JAN.31.1911.

Patented Apr. 15, 1913.

- 3 BHEETB-BHEET 1.

14:5 ATTORNEY S. W TURNER. TYPE WRITING MACHINE.

1221 101111011 FILED 11111.31. 1011.

3 SHEETS-$111121 2.

' Patented Apr. 15, 1913.

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TYPE WRITING MACHINE.

APPLIOATION FILED 1111.31, 1911.

1,058,531 5, Patentd Apr. 15, 1913.

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WITNESSES: WWW NVENTDR: I

M I .9. mZM R ZMW I 1-ll5 ATTURNEY 1 UNITED STATES raTENT orriou.

SAMUEL WTLLIAH TURNER, OF CANONBURY, LONDON, ENGLAND, ASSIGNOR T0 YOST WRITING MACHINE COMPANY, OF ILION, NEW YORK,

YORK.

TYPE-WRITING MACHINE.

A CORPORATION OF NEW Specification of Letters Fatent. Patented Apr. 15, 1913.

i Application filed January 31, 1911. Serial Np. 605,732.

To all whom it may concern:

Be it. known that I, SAMUEL VViLLIAM TURNER, subject of the King of Great Britain and Ireland, residing at 11 Douglas road, Canonbury, in the county of London, England, have invented new and useful Improvements in Type-\Vriting Machines, of which the following is a specification.

This invent-ion'relates to typewriting machines, and has for its object improvements in the arrangement. and construction of escapementmechanism for the platen carriage, whereby the letter spacing can be effected in two different spacing increments. These features in a typewrit-ing machine are specially useful in the case of writing Turkish and Arabic owing to the difliculty with which such writing is performed as compared with that of ordinary modernlanguages.

The invention consists in certain features of construction and combinations and arrangements of parts, all of which will be fully set forth herein and particularly pointed out in the claims.

In order that the invention may be the better understood, 1 will now proceed to describe the same'in relation to the accompanying drawings, reference being had to the letters and figures marked thereon.

Like letters refer to like parts in the various figures.

Figure 1 is a part sectional side elevation of the lower part of a typewriter with my invention applied thereto, the detachable part of the carriage being removed. Fig. 2 is a rear sectional elevation of the same. Fig. 3 is a view showing the two universal bars and two keys for letters requiring different spacing. Fig. 4 is a plan showing the two universal bars and their connection with the escapement mechanism. Figs. 5, 6, 7

and 8 are detail views showing the various positions of the escapement mechanismfor different spacing. Fig. 9 a detail viewof the two racks and escapement pinion. Fig. 10 is an end view of thecarriage and platen mechanism showing the operative means for drawing one rack out of engagement with the escapement. pinion. Fig. 11 is a. similar view at the opposite end of the carriage, showing the method of withdrawing )he other rack out of engagement with the es ca ementpinion.

v he escapement is of the rotary type and engages with the carriage by means of a pinion co-acting with a rack carried by the carriage.

According to this invention I provide two racks a and b, one on each side of the pinion c the said racks being alternately rocked into engagement with the escapement pinion at the will of the operator.

Therack ais pivoted on the carriage on screws a? and is provided with a bent. arm a. The disengaging movementof the rack about the axis of the screw a is'ef'fected by means i of a thumb lever a pivoted at q and having a projecting pin a which engages with the bent arm a Springs a are provided to return the rack a into its operative position.

The thumb lever a is maintained in the position shown in the drawings by means of a pivoted detent a so as to maintain the rack at out of engagement with the pinion c.

The rack b is pivoted to the carri age frame by means of screws Z2 and is operated by means of a. thumb lever 12 pivotedto the frame by a screw 6 the lower end of the lever 72 engaging with an upwardly projecting rib b. .The thumb lever b is main- I tained in its actuated position by means of a pivoted detent b which en ages with the upper, end of the lever 12?. provided to return the rack 1) into its operative position.

\Vhen a particular direction of travel of the carriage'is desired, the operator by regulating the position of the thumb levers a and Fallows either one or other rack a or b to come into operative connection with the escapement pinion 0 according tothe direction of travel of the carriage desired; the racks being on the opposite sides of the pinion c, permits motion of the carriage (l in either direction although the pinion has a uni-directional motion.

From the above description it will be obvious that when one of the keys and b is locked by its latch a or b, the other of said keys becomes a release key for the carriage.

In operating the carriage (Z I use a single spring drum d, the cord (Z of which passes gprings b are around a pulley or snatch block it and is atd or to the main frame of the machine at d and in this way the spring exerts apull .motion under the action of the spring drum from right to left as viewed in said figure; whereas if the pulley or snatch block (Z is attached to the carriage at d, the carriage will then have a motion from left to right as viewed in Fig. 2 which is a. rear view.

The differential spacing is obtained by means of two escapeniont wheels 6 and f, co-

=axially arranged on the shaft 9 which is driven by the pinion 0 through the intermediation of a clutch 0 in combination with an oscillating dog 6 adapted to move in a fixed plane and an auxiliary loose dog 0 adapted to have motion in two directions. 7

The escapeinent wheel 6 is rigidly fixed to v the shaft 9 while the escapement wheel f is loosely mounted upon the same and is per mitted to revolve freely through a fixed are controlled by stops f carried by the shaft 9 or by the fixed escapement wheel a.

In the form illustrated in the drawings, the stops f comprise a circumferential slot f arrangedin the boss of the wheel f, and a screw 9* rigidly fixed in the shaft The eseapement wheel f is spring pressed in relation to the fixed escapement wheel 6 in one direction by means of the spiral s ring eflflthe amount of movement being limited by the stops f hereinbefore described. The dog 6 is adapted to engage both the wheels e and f.

When a key button It is depressed for which a long space is required, the key lever h at the same time depresses a universal bar k which operates the dog trunnion [L3 so as to throw out the dog 6 from engage 'ment with the loose wheel f and throw it into engagement with the fixed wheel (2 which is shown'in Figs. 5 and 7. T he loose wheel f then advances the full space under spring action and on the removal of the finger of the operator from the key button the dog e returns to engagement with the loose wheel 7 and releases the fixed wheel 6 and the carriage advances the distance of the long space.

In order to deal with the short space a second universal bar j is arranged by which the auxiliary pivoted loose dog 6 is raised so as to trip past one tooth only of the escapement and thus permit a short space movement when the key button Z is depressed, thecharacter of which requires only a short spaceto be used. I i

By reference to Figs. 3, 6 and 8 it will be seen that. the movement of the auxiliary universal bar, j throws up the auxiliary loose dog. e' f into the, loose wheel 7 and by further depression ofthe key lever the ordinary universal bar If is depressed (see Fig. 3;} and the fixed dog a is thrown up l'roni the lower loose wheel f into the fixed whorl c the lower loose wheel f rotates under the action of the spring 0 until the loose dog a contacts with its stop 0, thus when the liu ger of the operator is removed from the key button Z andthe dog 6 again engages with the loose wheel f, the wheel a only permits the advance of the carriage for a short space. Upon the release of the dog 1 l'roni ihe wheel f, the dog moves back into contact with the stop (2 under the acii n oi" the spring e It willbe understood that the ordinary space key opt-rates the escapmnent in the same manner as a long space luflv lever and in addition thereto 1 provide a short span key lever in adapted to co-act with both universal bars j and it.

The operation of my machine is as fol- 'lows: l or writing ordinary ihahir: or

Turkish, the pulley al is attached in the frame of the niaclunc at d, the thumb lever B is actuated and maintained. in position l a detent b, the thumb lever M lmlni? used as a rclcasc key in the usual way. the car-- riage now moves from left to right under control of the cscapcnicut mechanism. the line of writing reading from right to loll.

In order that figures may be written it is necessary to'reverse the direction of the line of writing. the pulley d is therefore at tached to the carriage at ii. the thumb lever b is permitted to resume its normal (OiHlltion and the thumb lever (.6 is drawn toward the operator and maintained in position by the detent a, the lover I) being used as the ordinary release lever.

It will be seen that by the use oi. a unidirectional escapeinent' and escapcuient piir ion, it is possible to retain all the usual de vices common to typewriting machine cw capeinents, such as back spacing devices and. the like.

The means whereby the carriage feed is made reversible is not claii'ned herein but is claimed in a divisional case filed September -7, 1912, Serial'No. 719,066, patented January 14, 1913, No, 1,050,315.

Having thus fully described my invention I claim as new and desire to secure by Let.- ters Patent I 1. In a typewriting machine in combination a platen carriage, a fixed escapeinent wheel and a loose escapenicnt wheel on the escapenient axle the loose escapcment wheel having a limited free motion on said axle, a main universal bar having connected therewith a dog adapted to move at right angles to the plane of revolution of the cscapcment wheel, an auxiliary universal bar having connected therewith a dog adapted to move atright angles to the plane of revolution of its escapement wheel and also for a limited distance parallel to said plane of revolution,

key levers, and operative means on said key cording'as to Whether double or single 8 acmg motion of the escapement is require for the particular character used.

.2. In a typewriting machine, the combination of a 'carria e,'an escapement rack connected with sai carriage, a second escapement rack having a limited freedom of motion with reference to the first recited rack,' afldog for engagement with said two racks alternately to efi'ect the feed of the carriage, a series of keys, means operated by said keys for rating said dog, and'a second dog mova 1y mounted on a relatively fixed part of the machine and operated b certain of said keys into engagement wit said relatively movable rack and operating further to limit such freedom ofmotion of said rack. a

3. In a typewriting machine, the combination of a carriage, a toothed rack connected to move in unison with said carriage, a second toothed rack having freedom of mot-ion with respect to the first rack; such freedom of motion being limited to a 'plurality of teeth of the first rack, a dog for engagement with said two racks alternately to control the 'feed of said cairi'age, a series of keys, means whereb said keys-operate said dog', and a second 0g operated by certain of keys and moved thereby into engagement with the teeth oi said relatively movable rack'to limit the freedom of mo tion of said relatively movable rack to less than/ said plurality of teeth.

4.! In a typewnting machine, the combination with a carriage, of escapement mechanism for controlling variably and inter mittently the spacing of the carriage, said mechanism comprising an escapement rack connected to move in unison with said carriage, a second rack having freedom of motion with respect to the first rack, means for engagement with said two racks alternately to control the feed of said carriage, and means for variably limiting the. extent of freedom of relative motion between the two racks in order to vary the extent of movement imparted to the carriage at each aetuation of the'escapement mechanism, the last recited means including a reciprocatory dog ada ted for engagement with said second me and havin freedom 'of motion with said second rac less than the maximum freedom of motion of said second rack.

. In testimony whereof I have. signed my name to this specification in the presence of two subscribing witnesses.

' SAMUEL WILLIAM TURNER.

' Witnesses:

- WALTER CARVER,

Case. R. BULLOUGH.