US1173876A - Type-writing machine. - Google Patents

Description

1. SCOTT.

TYPE WRITING MACHINE.

APPLICATION FILED FEB. 11, 1915.

1,173,876. 7 Patented Feb.29,1916.

JAMES soorr, or EDINBURGH, SCOTLAND.

' TYPE-WRITING MACHINE.

Application filed February 11, 1915.

To all whom it may concern Be it known that 1, JAMES Soon, a subject of the King of Great Britain, residing at l Rutland Square, Edinburgh, Scotland, have invented certain new and useful Improvements in or Relating to'lype-l/Vriting Machines, ofwhichthe following is a specification.

This invention relates generally to typewriting machines of the kind in which the type bars are carried by axles mounted in fixed bearings and relates particularly to book typewriting machines of this character which are fitted with reversible type heads, the chief'object being to enable the type heads to be expeditiously adjusted so that the type thereon can be perfectly alined and rendered in condition'for obtaining correct writing on the platen with greater facility than has" heretofore been possible. In existing machines of this character the alinement of the type on the type heads has been effected by shifting the bearings of the type bars and refixing the same, or by bending or distorting the type bars, or by effecting both these operations. These methods of adjustment are unreliable and troublesome in practice and considerable time is required to effect the alinement of the type.

According to this invention the type head is mounted cnthe type bar in such a manner that it canbe set or adjusted thereon to increase or diminish the distance between the type and the fixed bearings of the type bar axle for effecting the desired alinement of the type. The. type head is mounted on an eccentric, cam' or other suitable member which is carried bythe type bar and arranged so as to be capable of angular displacement or rotation about a fixed axis which is normal to the longitudinal axis of the said type bar, the maximum displacement of the type head in relation to the type bar depending on the eccentricity of the eccentric or cam with respect to this fixed axis. hen the type heads are provided with two or more type characters they are mounted on the'eccentrics or cams so as to be free to turn thereon and are adapted to be retained in theirvarious positions by means of springs or other appropriate means pro vided on the type bars.

In order that the said invention may be Specification of Letters Patent.

Patented Feb. 29, 1916.

Serial No. 7,558.

printing. operation has been effected, and,

Fig. 6 is a cross sectional view thereof with the rows of type bars inposition.

Referring to Figs. 1 to 4 a is the type bar which is provided at its upper end with an enlarged portion or. adapted to support. the eccentric or cam b on whichthe type head d is mounted. he said eccentrioor cam comprises a shoulder or collar formed eccentrically' on a pin, screw, or rivet 6', carried by the end portion a of the type bar a and it may be set or adjusted toaline the type d on the type head by imparting an angular movement to the pin or. the like 6 on which it is formed. When the eccentric b is set or adjusted it may be locked in position by V clenching the pin, screw,sor rivet b or by securing. the same from displacement in any other suitable manner. The type head 05 is provided with an opening d for receiving the eccentric or cam Z) and may beretained lnposition thereon by means of an external collar or disk 6?. The eccentric or cam b is shown formedintegral with the collar or diskid and the latter is provided with a slot or depression d for enabling a screw driver or similar tool to be employed for imparting an angular displacement to the cam b about its fixed axis during the'setting or adjusting operation. Or the member (i may be made hexagonal so that the desired-adjustment may be effected by means of a spanner or the like. The eccentric or cam may be mounted on the type bar in any other manner so long as it is capable of being set or adjusted to eii'ect the desired displacement of the type head with respect to the axis of the pin 12 (Fig. 2) and the fixed bearings of the type bar. The type head (Z is shown in the drawing provided with two type characters (2 but it will be. understood that the improved method of mounting is equally applicable to type heads bearing single type characters. I

In the case of reversible type heads which are provided with two or more type characters d it is often advisable to arrange the type bars a pertaining thereto, so that the type heads are disposed in series or rows 6,6 one above the other as shown in Fig. 6, to permit of their being conveniently clustered around an opening in the framing of the machine. With this arrangement of the type bars I effect the resetting'of the type heads d after the typing operation, by two or more superposed segments or rings 6 e which are adapted to act on the type heads when the type bars have regained their elevated position. i

In order to allow the type heads 6 of the upper row to engage with their resetting segment or ring 6 it is necessary to slit or serrate the segment or ring 6 pertaining to the lower row of type heads as shown in brokenlines in Fig. 5, as otherwise the type heads of the upper row would engage with the segment or ring 6 pertaining to the lower row of type heads and would be prevented from' engaging with their own particular segment or ring 6 By serrating the lower segment or ring 6 free movement of the type heads of the upper row may be obtained as they enter the serrations or slots 6 in the lower segment or ring and come into contact with the upper resetting segment or ring 6 provided therefor. In this manner the type heads and type bars may be compactly arranged around the opening in the machine so that the number of type heads and the capacity of the machine may be considerably increased.

The reversal of the type heads d, d is effected by means of an arcuate'frame g,

' Fig. 6, which carries two series of radial arms 9 arranged at different levels to correspond with the two rows or series of type heads 6, 6 j Two perforated lugs 9 may be provided on the frame and are adapted to be engaged with two pins 9' arranged on the framing of the machine. Each of these pins is provided with a spiral or other spring 9 which flexibly supports the frame 9 above the type bars. The frame is connected by suitable mechanism, not shown, with the change keys of the machine and the depression of these latter will cause the frame to be lowered against the action of c the springs 9 When the frame is in the lowest position the extremities g of the radial arms 9 thereon are in the path of movement of the type bars and will engage with the projections (Z formed on the type heads thereof when the type keys are operated In this manner an angular movement will be imparted to each of the type heads so that the lower type character (Z frame 9 is not operated the upper type d will be in the operative position.

If a type head is to be reversed, one of the change keys of the machine is first depressed to bring the frame 9 into the operative position, so that when the type key corresponding to the type head is operated the desired reversal will be effected and the proper character brought to the printing position.

The type heads are adapted to beretained in their normal or reversed positions in the usual manner by springs f which are mounted on the type bars and are adapted to engage with projections f thereon.

What I claim and desire to secure by Letters Patent of the United States is 1. In a typewriting machine, the combination with a type bar, of an adjustable eccentric carried by the said bar and a type head mounted on the said eccentric.

2. In a typewriting machine the combination with a type bar of an eccentric carrled by the said bar, a type head mounted Von the said eccentric and means for imparting an angular movement to said eccentric about a fixed'axis normal to'the longitudinal axis of the type bar.

3. In a typewriting machine the combinationwith a type bar of a pincarried by the said bar, a collar formed eccentrically on the said pin, a type head mounted on the said eccentric collar and means for imparting an angular movement to the said eccentric collar to effect the alinement of the type.

4, In a typewriting machine the combination with a type bar of an adjustable eccentric carriedby the said bar a type head.

mounted on the said-eccentric so asvto be free to turn thereon and a pluralityof type characters on said typehead.

5. In a typewriting machine the combination with a type bar of an adjustable eccentric carried by the said bar'a type head mounted on the said eccentric soras to be free to turn thereon, a plurality of type characters on said type head and means for turning said type head on the eccentric to centric carried by the said bar a type head.

mounted on the said eccentric so as to be free to turn thereon,a plurality of type characterspn said type heads, means'for turning said type head on the eccentric to bring, one or other of the typefcharacters 7 into the operative position andmeans for resetting said head after the printing operations. p V

7 In a' typewriting machine the combination with two series of type bars'having their extremities at different levels of adjustable eccentrics carried by the extremities of said bars, two series of type heads mounted on the said eccentrics so as to be free to turn thereon, a plurality of type characters on each of the said type heads, means for turning said type heads on the eccentrics to bring one or other of the type characters thereon into the operative position and two superposed resetting segments or rings the lower of which is suitably serrated.

In testimony whereof I aflix my signature in presence of two witnesses.

JAMES SCOTT. Witnesses:

JOHN SAMSON, ALEX. L. COCKBURN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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