US2258212A - Typewriting machine - Google Patents

Description

OCL 7, 1941- w. o. MlcHL-:LSEN

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Oct. 7, 1941.

W. O. MICHELSEN TYPEWRITING- MACHINE Original Filed March 9, 1939 2 Sheets-Sheet 2 LU. 0. Mieke/sen am 6MM v1 0% Patented Oct. 7, 1941 TYPEWRITING MACHINE wuum o. Michels, wwahaven, N. Y., mig'ncr to Royal Typewriter Company, Inc., New York, N. Y., a corporation of New York Original application MarchA 9, 1939, Serial No.

260,841. Divided and this application September 5, 1940, Serial No. 355,532 y 4 Claims. (Cl. IS7-114) This application is a division of my co-pending application Serial No. 260,841, ied March 9, 1939.

This invention relates to typewriting machines and more particularly to line spacing mechanism therefor. Mechanism embodying the invention is especially adapted for typewriting machines equipped with power-operated carriage return mechanism.

An object of the invention is to provide a novel and improved train of connections between a power-operated carriage return mechanism and line-spacing mechanism.

Another object is to provide a combined poweroperated carriage return and line-spacing mechanism and a `manually operable line-spacing mechanism, the two mechanisms being so related that the handle of the manually operable mechanism will not be rocked by operation of the power-operated line-spacing mechanism..

' Other objects will become apparent from a reading of the following description, the appended claims. and the accompanying drawings, in which:

' Figure 1 is a fragmentary top plan view of a typewriter provided with `mechanism embodying the invention, certain parts not necessary to be disclosed for aiding in an understanding of the invention claimed herein being omitted;

Figure 2 is a fragmentary topl plan view of a corner of the typewriter key board and showing a carriage return key;

Figure 3 is a fragmentary elevational view of X in Figure l;

Figure 4 is a fragmentary elevational view, of

the manually operableline-spacing lever as seen when looking from the left of Figure 3;

Figure 5 is a detail section taken on the line 5-5 of Figure 3;

Figure 6 is a fragmentary bottom perspective view of a line-spacing lever handle; 4

Figure 7 is a detail view of the left end of the platen and parts of an associated line-spacing mechanism; and

Figure 8 is a fragmentary rear elevation as viewed when looking in the direction of the arrow 8 in Figure 1.

Mechanism embodying the invention may be applied to or incorporated in various kinds of typewriters. For the purposes of illustration, a preferred form of mechanism embodying the invention is shown as being applied to a Royal Standard typewriter, the general construction which is well known. The typewriter includes a main frame or housing generally designated A and a carriage B mounted on the frame for the usual letter-spacing and return movements. A platen i, mounted in the customary manner on the carriage, is equipped with a line-spacing ratchet 2, which is adapted to cooperate with a pawl l carried .by a line-spacing rock lever l.

A spring motor which is not shown and which l may be of usual construction is provided for moving the carriage inletter-spacing direction under the control of suitable escapement mechanism not shown).

A margin stop bar I supported on the carriage serves to mount a left margin stop Il having an adjustable abutment screw il arranged to cooperate with a center stop (not shown) for limiting movement of the carriage in the return direction (to the right. as viewed in Figure 1).

The typewriter is equipped with power-operated carriage return mechanism including an electriemotor C arranged to drive winding mechanism housed within a casing 42. the winding mechanism being arranged to wind up a pull band F for effecting power-operated carriage return, and to pay out the pull band to permit the carriage to perform letter-spacing movements under the drive of the usual spring motor previously referred to. The details of the mechanism for winding up and paying out the pull band F and the controls for this mechanism are disclosed fully in the parent application Serial No. 260,841, but are not shown herein. since disclosure of suchsdetails is not necessary to an understanding "of the invention claimed in'this application. Briefly stated, the winding mechanism is operable under control of a carriage return key J (see Figure 2) on an arm ill carried `by a shaft i extending into the casing I3. When 40 the key J is depressed the winding mechanism will wind up the band F, pulling it tothe right in the direction of the arrow u in Figure i. As is described hereinafter, the band F is connected to the carriage and to line spacing mechanism 4l so that movement of the bend in the direction' of the arrow u will effect line-spacing movement of the platen and return movement of the carriage.

Referring now to the connection between the I0 pull band F and the carriage B through linespacing mechanism, Figures 1 and 8 show an angle plate 235 providedwith a leg 238 which is clamped under the tabular stop frame securing nut 231 on the carriage. A lever 239 is pivotally of Il mounted as at 229 on the plate 235. and has its .252 for the pivot 242 of the lever 243.

rear end attachedV by a screw 240 t-o a connecting piece 24| at the end of the band F. Also pivoted as at 242 on the plate 235 and overlying the lever 238 is a lever 243 which is urged in a clockwise direction, as viewed in Figure 1, by a spring 244. The lever 243 is formed with a slot 245 into which extends a roller pin 246 carried by the lever 238. The free end of the lever 243 is connected as at 241 to the rear end of'a pull rod or link 246, the front end of which is pivotally connected as at 249 to the line-space rock lever 4. When the band F pulls the rear lend of the lever 236 toward the right as viewed in Figure 1, the roller 246 will bear against the rear wall of the slot 245 to swing the lever 243 rearwardly, thu's pulling the rod 248 rearwardly and rocking the line-spacing rock arm 4 rearwardly (to the left as viewed in Figure 7) so as to effect line-spacing. It is desirable that the carriage be started on its return travel immediately after completion of line-spacing movement of the platen. To this end, means are provided for limiting the swingingv of the lever 236 under the pull oi the band F. A stop lug 256 on the lever 238 is adapted to engage a stop arm mounted adjustably under the plate 235, one end of 'the stop arm 25| being clamped under a lock nut The stop arm 25| is' formed intermediate its ends with a slot 253 through which extends a lockingscrew 254. By loosening the lock nut 252 and the locking screw 254, the stop arm 25|v can be shifted about the pivot 242 so asV to vary the movement of the arm 236 which will take place before the stop lug 256 thereon engages the stop arm 25|. Preferably, a cover 255 is connected to the plate 235 and extends over the levers 236 and 243.

It isy desirable at times to eiect manual linespacing, and, to provide for such operation, a link 256'has its rear end pivotally connected as at to allow the depression 266 to move relatively away from the head of the rivet 265. thus allowing the handle 263 to swing to the dotted line position shown in Figure 1. The pin and slot lost motion connection 259-258 between the link 256 and the arm 260 permits the link to reciprocate idly during automatic line-spacing without oscillating the line-spacing lever 26|.

In order to prevent injury to the band F and possible entanglement of paper with the band and pulley 94, a horizontally disposed guard 269 is attached at one end to the bracket 96 by means of a screw 210. Adjacent its other end the guard is attached to the usual tabulator linger cover (not shown).

'Ihe screw 216 attaching the right hand end of the guard 269 to the bracket 96 preferably is shouldered so as to serve as a pivot for a swingable paper guide 213. The purpose of the paper guide is to support and prevent the rear overhanging end of a narrow sheet of paper used at the extreme right side of a wide carriage from becoming entangled between and damaged by the rear of the carriage and the carriage return mechanism. The guide 213 is shown in full lines in its operative' position in Figure 1, but is movable to an inoperative position as shown in i ing mechanism housed within the casing 42 and to wind up the pull bandF, moving it in the direction of the arrow y in Figure 1. This causes the'lever 238 to be rocked from the position shown 261 to the line-spacing rock arm 4, and at its front end is formed with a slot 256 which receives a 'pin 259 carried by the shortactuating arm 1y member 260 of a line-spacing lever generally 'designated 26| pivoted on the carriage by a shoulder vscrew 262. A handle 262, also pivoted as at 262, -normally extends substantially transverselyto 'the line of carriage travel and is-formed on its lower side with a at surface or pressure face v264l which is adapted to engage the front edge of the short arm 266 when the handle 263 1s moved in a counterclockwise direction, as viewed inFlgure 1, so as to movegthe arm 266 in the. same direction, thereby pushing the link 266 and rocking the arm 4 .rearwardly to effect manual line-spacing in the usual manner. The handle 263 and short arm 266 oi' the line-space lever thus are connected by a one-way drive connectlon'264--266 in order that the handle 263 may yield and move rearwardly to a position in which it extends substantially parallel to the line of carriage travel, as shown in dotted lines in Figure 1 if the operator should catch his or her hand between the handle and the typewriter when the carriage vis beingmoved on its return travel by the motor C. Thehandle 263 and the arm 266 should, however, normally be held releasably in the relative positions shown in Figures 1, 3, 4, and 5. To this end a rivet 265 is ilxed to the arm 266 with its head disposed to be received 'by a depression 266 in the lower face of a projection 261 o`n the handle 263. A spring washer 266 is disposed under the head of the screw 262 and is so tensioned as to permit relative separating movement of the arm 260 and handle 263 s o as infull lines to the position shown in dotted lines in Figure l, thereby rocking the, lever '243' and pulling rearwardly on the link 246 to eiect linespacing movement of the platen When the stop lug 250 on the lever 236 engages Vthe stop arm 25|, continued movement of the band F will movethe carriage toward the right. If.- during such movement, the loperators hand or any article should be caught between the line-space lever handle 263 and the typewriter frame, the handle will yield and move to the position shown in dotted linesl in Figure 1, so that no injury will be done to the operator or the typewriter.

vThe mechanism disclosed herein embodies the invention in its now preferred form, but various changes may be made in the construction and relative arrangement of the parts Without departing from the invention as dened in the claims.

nected to said mechanism and being formed with I a slot; and a pin on said line-spacing lever extending into and being slidable in said slot and cooperable with one end thereof to provide lost motion connection between said link vand said lever.

2. in a typewriting machine, a frame; a carriage mounted thereon for letter-spacing and return movements; a platen mounted on the carriage for lime-spacing movements; a linespacing device associated with said platen; pow-4 er drive mechanism; a. lever pivotally mounted on said carriage; a draw member operable by said power drive mechanism and being connected to said lever; a second lever pvotally connected to said carriage; a pin-and-slot connection between said two levers; and a link connection between said second lever and said line-spacing device.`

3. In a typewriting machine, a frame; a carriage mounted thereon for letter-spacing and return movements; a platen mounted on the carriage for line-spacing movements; a line-spacing device associated with said platen; power drive mechanism; a lever pivotally mounted on said carriage; a draw member operable by said power drive mechanism and being connected to said lever; a second lever pivotally connected to said carriage; a pin-and-slot connection between said two levers; a link connection between said second lever and said line-spacing device; and a thereof by said draw member.

4. In a typewriting machine, a frame; a carriage mounted thereon for letter-spacing and return movements; a platen mounted on the carriage for line-spacing movements; a line-spacing device associated with said platen; power drive mechanism; a lever pivotally mounted on said carriage; a draw member operable by said power drive mechanism and being connected to said lever; a. second lever pivotally connected to said carriage; a pin-and-slot connection between said two levers; a link connection between said second lever and said line-spacing device; a stop arm adjustably mounted on said carriage and being provided with a stop lug disposed in the path of rocking of the first mentioned lever for limiting pivotal movement thereof relative to the carriage and thus determining the amount of movement to be transmitted to said second lever and said line-spacing device; and means for securing said stop arm in adjusted position, adjustment of said arm varying the amount o! Vmovement transmitted to the line-spacing device. i A

WILLIAM O. MICHEISEN.

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