US2209705A - Typewriter - Google Patents

Description

July 30, 1940. 'A 2,209,705

TYPEWRITER Filed April 2; 1937 2 sheets -sheeft l g3 PFHU I HTTOIINEY July 30, 1940. M. PFAU V 2,209,705

' TYPEWRITER' Filed April 2, 1937 2 Sheets-Sheet 2 H TTO/K/VE) '15 frame by means of spring clip connections and withdrawn from said spring clips by pulling said lie Patented July 30,1946 2,209,705 I UNITED STATES PATENT OFFICE TYPEWRITEB Max Pfau, Frankfort-on-the-Main, Germany, as-

signor to Torpedo-Wake Aktiengesellschaft, Frankfort-on-thc-Main, Germany Application April 2, 1937, Serial No. 134,537 In Germany July 3, 1936 8 Claims. (Cl. 197-186) The invention relates to typewriters, particstruction'and comprises a front wall 2 and side ularly to portable and small typewriters, in which walls 3, the carriage being displaceable on a, the type mechanism and the inking ribbon spools roller guide 4 (Fig. 2). A protecting hood 6 are covered by a protecting hood, and has for recessed for the passage of the type levers serves I 5 one of its objects the provision of means for seto cover the mechanism of the machine and the .5

curing the said protecting hoodto the frameof inking ribbon spools thereof. n the machine in such manner that for the pur- The machineframe I has brackets I which pose of replacing the inking ribbon, cleaning the are screwed to the side plates 3|, and which types or the like, the protecting hood may be carry two pairs of spring clips 8, 9 (Figures 3 1h removed or swung open without the aid of tools, to 5) lying in front of the roller or platen |0 and if} but is nevertheless securely held on the frame forming hinges for pins arranged on the rear of the machine during use. edge of the protecting'hood 6. The protecting For this purpose, the protecting hood accordhood 6 is thus so held as to be easily swingable ing to the invention is secured to the machine about the spring clips 8, 9, while it may be easily a sliding bolt connection, the spring clip connechood in an upward direction. tions being provided on the side which faces the Under the inwardly bent edge l2 (Figures 6 carriage,- and consisting of hinge pins mounted and '7) of the front wall 2 of the machine frame between spring tongues on the machine frame, a locking lever I4 is mounted to pivot about so thatthe protecting hood may be swung open a pin l3 against the action of a torsion spring m in the direction of the roller or platen when said l5. The push button I6 is placed at an end of bolt connection arranged on the front of the ,the locking lever l4 which passes through the frame has been disengaged. front wall 2 of the machine frame I, the lever By reason of this particular method of secur-' having underits extremity a'downwardly bent ing, the protecting hood may either be swung part provided with a cam edge Hi. The extrem- 5 open, which is sufficient, for example, for replacity IT is adapted to engage over the stop hook ing the inking ribbon, or completely removed 29 attached to the hood 6 in any convenient from the frame without difficulty. manner.

In order to prevent the'protecting hood from On an extension 20 of one of the brackets of being lifted while the line spacing lever or any the spring clips 6, 9 a lever 2| is mounted to pivot 3 other part of the carriage of the machine is ly-' about a pin 22, a downwardly bent part 24 of a ing in the path of the protecting cover, said bolt locking bar 25 being guided in an oblique slot is provided with a locking device which is so con- 23 in the said lever 2|. The locking bar 25 is trolled by the carriage that said bolt cannot be rotatably mounted close to one side wall of the disengaged until the carriage takes up a position machine frame and has a laterally disposed arm 35 in which the line spacing lever lies adjacent the 26 which extends under the edge H of the front frame of the machine. wall 2 to a point adjacent the cam edge H of In order that the said invention may be clearly the lever l4. understood and readily carried into effect, the The laterally disposed parts of the locking bar 40 same will now be described more fully with ref- 25, and also the pivoted lever 2| with the slot erence to the accompanying drawings, in which, 23 are of such dimensions that the pivoted le- Figure 1 is a plan view of the frame of a small ver 2| may lie together with a projection 21 in typewriter, the path of a control strip 28 or the carriage 5. Figure 2 is a side elevational view partly in Under the action of the weight of the laterally section, disposed arm 26, the projection 21 will normally 45 Figures 3 to 5 show details of the spring clip occupy the position such that it lies in the path connections, of the strip 26, and the arm 26 will occupy its' Figures 6 and '7 are side elevational and plan lowest position as shown in full lines in Figures views respectively ofthe sliding bolt, 6, 8 and 9. In this position the arm 26 is clear 50, Figures 8 and 9 are rear elevational and plan of the cam edge I! and allows movement of the views respectively of the locking device for the lever I4.

bolt, and c 1 If, however, the carriage 5 is lying in such a Figure 10 shows a modified form of spring position as to'engage the pivoted 'lev'er 2| with clips empioyable in the invention. the strip 28, then the arm 26 of the locking bar The frame I of the machine is of usual con- 26 assumes the uppenposition (shown in dotted lines) illustrated in Figures 6 and 8 and bears against the cam edge It of the locking lever M. The latter is then prevented from swinging about its pivot It, so that it cannot leave the hook 29 and therefore cannot release the hood 6. The projection 21 is not released from engagement with the control strip 28 of the carriage of the machine-until the-line spacing lever 30, which moves over the protecting hood '6 during a part of the movement of the carriage, has reached a position to one side of the hood and consequently would no longer jam against said hood on opening or removal thereof. The carriage 5 must therefore be moved so far to the left, before the opening of the protecting hoodS, that the line spacing lever 38 is no longer located immediately above the protecting hood. The control strip 25 then allows the arm 26 to fall and release the locking lever Hi.

The two spring clips 8, 9 shown in Figure 4 may be constructionally modified. For example, the

clip part 32 (Figure 10) may be of rigid material and have a curved portion 33 completely receiving the pin H, a flat leaf spring 34 bearin against the said curved portion.

It will be noted from the above explanation that there is thus provided in, a typewriter having a frame, a carriage on said frame, type mechanism, ink ribbon spools for said mechanism, and at protecting hood for said mechanism and said spools, a part of said carriage being movable over said hood, the combination of hinge means to connect said hood. with said frame on one side of said frame, connectable means for said frame and said hood on the opposite sideof said frame, and arresting means adapted for engagement with a movable part of said connectable means, and means under control of said carriage for placing said connectable means under restraint by said arresting means only when said part of said carriage is positioned above said hood.

What I claim is:

1. In a typewriter having the type mechanism and the inking spools covered by a protecting hood, pairs of spring tongues arranged adjacent the platen upon the frame of the machine, pivot members secured to the hood and adapted to detachably and rotatably enter between the spring tongues, a sliding bolt connection between the front side of said hood and the front side of themachine frame, a member disposed within the path of the carriage of the typewriter, and a connection from said member to a locking element arranged adjacent the said sliding bolt and adapted to impede the action of the same when said member and carriage co-act with one another.

2. In a typewriter having the type mechanism and the inking ribbon spools covered by a protecting hood, spring clip connections adjacent the platen between the rear side of said hood and the adjacent part of the machine frame, a sliding bolt connection at the front side of said hood between the latter and the adjacent part of the machine frame,-a member pivoted at one end and having its other end arranged to lie in the path of the carriage of the typewriter, a mechanical connection between the free end of said member and a locking element, and a cam edge connected with the slidable bolt of said sliding bolt connection; whereby displacement of said pivoted member by co-action with the carriage results in movement of the locking element to an engaged position with the cam edge to prevent movement of the sliding bolt.

3. In a typewriter having the type mechanism and the inking ribbon spools covered by a protecting hood, spring clip connections between the hood and frame along the side of the hood adjacent the platen, a sliding bolt connection between the hood and frame at the front side thereof, a pivoted member having its free end arranged to, lie in the path of the typewriter carriage, a bar connected to said free end and extending in front of a cam edge secured to the bolt of said sliding bolt connection, said bar being shaped so that when the pivoted member co-acts with the carriage the portion of the bar in front of said cam edge lifts to a position where the latter is locked against movement.

4. In a typewriter having a frame, a carriage on said frame, type mechanism, ink ribbon spools for said mechanism, and a protecting hood for said mechanism and said spools, a part of said carriage being-movable over said hood, the combination of hinge means to swingably and clampingly connect said hood with said frame on the rear side of said frame, connectable means for said frame and said hood on the front side of said frame and said hood, and locking means adapted to engage said connectable means, said locking means being controllable by said carriage, said connectable means being releasable from said locking means when said part of said carriage is removed from above said hood.

5. In a typewriter having a frame, a carriage on said frame, type mechanism, ink ribbon spools for said mechanism, and a protecting hood for said mechanism and said spools, a part of said carriage being movable over said hood, the combination of hinge means to connect'said hood with said frame on one side of said frame, connectable means for said frame and said hood on the opposite side of said frame, and arresting means adapted for engagement with a movable part of said connectable means, and means under control of said carriage for placing connectable means under restraint by said arresting means only when said part of said carriage is positioned above said hood.

6. In a typewriter having a frame, a carriage on said frame, type mechanism, ink ribbon spools for said mechanism, and a protecting hood for said mechanism and said spools, the combination of hinge means at the rear of said hood and said frame, movable connectable means for said frame and said hood mounted at the front of said frame, said hinge means and said connectable means detachably retaining said hood on said frame, and-means controllable by carriage position and engageable with said' connectable means for impeding movement of said connectable means at predetermined positions of said carriage.

7. In a typewriter having a frame, a carriage on said frame, type mechanism, ink ribbon spools for said mechanism, and a protecting hood for said mechanism and said spools shiftable to expose ribbon spools and type mechanism; first means adjacent said carriage connecting said hood to said frame, second means releasably connecting said hood to said frame at the opposite end of said hood, and means controllable by carriage position and engageable with said second connecting means for arresting releasing action of said second connecting means when said carriage is in a position to obstruct the shifting of said hood.

8. In a. typewriter, a frame, a carriage on said frame, a platenv mounted on said carriage, type mechanism and ink ribbon spools in front of said platen and covered by a protective hood; a hinge connection between said hood and said frame adjacent said platen, a sliding bolt con nection between the front side of said hood and the front side of said frame, a member disposed within the path of said carriage and arranged to be shifted thereby, an element secured to a sliding part of said bolt connection, and means connected to said member and extending to said element and shiftable to a position to impede'the action of said s'lidable part when said member A and carriage coact with one another.

MAX PFAU.

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