US1609943A - Typewriting and like machine - Google Patents

Description

Dec, 7 1926. 1,609,943

F. A. HART TYPEWRITING AND LIKE MACHINE 1 Filed July 15, 1925 l A WITNEEEE s, h

Patented Dec. 7, 1926.

UNITED STATES PATENT OFFICE.

'FREDEBICK A. HART, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO REMINGTON TYPEWRITEB COMPANY, OF ILION, NEW YORK, CORPORATION OF NEW YORK.

TYPEWRTTING AND LIKE MACHINE.

Application filed July 13, 1925. Serial No. 43,071.

of the carriag'ein letter feed direction. In such machines unless provision is made to the contrary, certain difiiculties may be encountered if the carriage return mechanism should be brought into operation at a time When atabulator key is'also operated, and

. parts, all of which "will be fully set forth everis pivoted. to a long link 25, which at its u per'end at- 26 is pivoted to a carriage re ease lever 27, which lever is pivoted the prinicpal object ofthe present invention is to provide a lock or connecting device between the two mechanisms so as to prevent simultaneous operation of the carriage re-.

turn mechanismand the tabulator mechanism'. .f

To the above and other ends the invention consists in'certain features of construc. tion and combinationsand arrangements of herein and particularly pointed out in the claims; i Y 7 One instance of the invention is illustrated in the accompanying drawing, in which Figure 1 is a fragmentary front to rear vertical sectional view of so much of a typewriting machinefof the kind mentioned above as is necessary to illustrate the invention. 1

Figure 2 is in the nature of av rightward extension of Figurel, with parts in section. 1

Figure '3 is ;a fragmentary front view, partly in section.

The invention is shown applied to a Renfington typewriter having attachedthere'to the electric carriage return mechanism shown and described in my application for Letters Patent for improvements in typewritin and like machines, filed February 6. 1925, erial No. 7213, now Patent No. 1,567,590 dated Dec. 29, 1925. Except as hereinafter po nted out, the. present machine is or may be identical with the one described in the said prior application.

The frame of the Remington typewriting machine comprises a base casting 1, whichbv corner posts supports a top plate 2 on which 'are mounted two carriage-rails 3, the rear one being shown. Said rails by roller bear ing s 4 support and guide the carriage 5. This latter has pivoted thereto a feed rack 6 meshing with a feed inion 7, which pin- .ion is connectedwithft e usual escapeme'nt mechanism, not shown. The carriage also has arms 8 rigid thereon, which arms support a tabulator column stop bar 10 having thereon a series of column stops 11, one of those shown in the drawing being in its forward inoperative position and the other projected to its rear and operative osition. The denominational stops -12 consist of the upper ends of vertical levers pivoted at 13 in a frame 14 secured to the rear part of the typewriter frame, The stop levers 12 are .operated at their lower ends by push rods .15 having keys 16 on their forward ends. The levers "12 operate a universal irameicomprising a universal bar-17 and an arm-ion frame 18, normally held in its for ward position by means of a spring 20. The

'framel18 when it is slid rearward by the operation of a tabulator key, rocks a lever 21.jwhich has a stationary pivot 22 and is ivoted to the frame 18 at 23. At 24 said at 28 on a bracket 30 secured to the top plate 2.- The lever 27 carries a shoe 31 lying beheath the feed rack 6. The constructionis such that when a tabulator key is operated, this link 25 is pulled down, the feed rackis ordinary Remington typewriter equipped with a denominational tabulator, but it will of course be understood that these parts may be of any ordinary'or suitable construction.

' The electric carriage return mechanism comprises a power unit, the frame of which consists of a single casting 32. This casting comprises a' box-like part projecting rear ward fromthe rear shelf of the base casting 1 and having a flat top on which is detachably mounted any suitable electric motor 33 having a horizontal armature shaft 34. The castin 32 is secured to the base 1 by means inclu ng certain bolts 35. Said casting extends upward from said base, thence somewhat-towards the front of the machine and thence a in upward, projecting through a hole in e top plate 2. The armature shaft 34 is, by a flexi 1e coupling designated generallyas 36, connected with a horizontal shaftjournaled in the upright (part of the casting 32 and having a bevele pinion 37 5 bracket 41 of the casting 32 and at its upper leftward from the free en partin the uppermost part of said casting, the shaft having a spur inion 42 mounted on its upper end and meshing with a rack bar 43 suitably mounted on the underside of the rear rail of the carriage 5.

A clutch between the gear 38 and the drnve shaft 40 comprises teeth 44 depending from the hub of the gear 38, and adapted to engage .teeth 45 on a clutch member 46 adapted to be slid up and down on the lower square part of the shaft 40. This clutch is normally open. In order to control it the body of the lower clutch member 46 has a wide peripheral groove in which runs a roller 47 mounted on a hub or wrist in 48'projecting of one arm 50 of a bell crank having another arm 51 and having a split hub and a tightening screw means of which it is rigidly mounted on t e right-hand end 'of a rock shaft 53 journaled in the casting 32. The depending arm 51 has pivoted thereto a rod 54 extending rearward through the wall of the castin 32, terminating as shown in Fig. 2 in a box-like base portion of said casting. A spring 55 is coiled about the rod 54 and compressed, between the casting 32 and an adjusting nut 56 on the rod 54 with a tendency to rock the shaft 53 and to close the clutch.

The shaft 53 is held in its normal position with the clutch open by the followin means: said shaft extends to the left-han side of the machine where it is journaled in another casting and where it has rigidly mounted thereon a forwardly extending arm 57 which is normally engaged by a latch 58 pivoted at 60, and drawn into latching engagement by a spring connected thereto at 61. A link 62 extends to suitable automatic and manual means for tripping the latch 58, which if it be done will permit the spring 55 to close the clutch.

The circuit for the motor includes two conductors 63 and 64 inside the box-like part of the casting 32, said conductors being secured by screws 65 to an insulator 66. The conductors 63 and 64 are provided with contact points 67 which tend to come into contact by the resilience of the conductor 64 but which are normally held out of contact by the rear end of the rod 54c0ntacting with an insulator 69 on the upper end of the conductor 64. When the latch 58 is tripped andthe spring 55 rocks the shaft 53, the circuit is closed at 67 and, the clutch being also closed, the carriage return mechanism comes into operation to draw the carriage back to the right.

The carriage return mechanism described return mechanism may be variously con structed.

In the particular carriage return mechanism here shown, if the carriage goes clear back to its normal point of arrest, the clutch and circuit become automatically opened, as above mentioned, and the operation of the mechanism ceases. If, however, the carriage were to be arrested by any means before it reached the regular point of arrest, then the clutch and circuit would not be opened, the motor would be stopped and the current running through it would be likely to injure it if it were allowed to run for any length of time. This sort of operation might also tend to strain the mechanism and be disadvantageous in various ways. Such an incorrect operation of the mechanism would occur if one of the tabulator keys 16 should be pushed in while the carria 'e return mechanism was in operation, an also in case the key was already being held in at a time when the carriage return key was operated to trip the latch 58. In that event the carriage might not go back to its regular point of arrest but might, on the contrary, be arrested by the tabulator stops ll,

.12, with the injurious and disadvantageous results referred to. It is therefore the principal object of the present invention to against such an operation.

- The specific form of interlock for the purpose shown in the drawing, comprises an arm 70 mounted on the link 25, which is included in the universal bar mechanism of the tabulator, said arm projecting over one of the parts that is operated by the spring 55. In the present instance this arm projects over the hub or lug 48 on the free end of the arm 50. It normally stands at such a height above said hub or lug as to permit the arm 50 to rise in case a tabulator key is not operated; but when a tabulator key is operate the arm 70 is pulled downward over the hub 48 and will prevent the spring 55 from starting the motor even though the latch 58 may be tripped while the tabulator key is ipushed in. Under the conditions guard downward motion ot the 'arm 70 would rock the arm and open the clutch and circuit so that the harmful effects of this incorrect operation of the tabulator would not occur.

It is preferable that said arm 70 be adjustable up and down to get it into the rightposition, and this can be effected in any suitable way. As here shown said arm is part of a piece of sheet metal, which is attached to the link 25 by two screws 71 passing through vertical slots 72 in said piece and threaded into the link 25. A piece 73 of sheet metal may be used as a double washer for the two screws. The slots 72 afford the desired up and down adjustment, which is secured by tightening the screws 71.

Various changes may be made in the details of construction and arrangement without departing from the invention. I

WVhat I claim as new and desire to secure by Letters Patent, is

1. In a typewriting or like machine the combination with a carriage, power carriage returnmechanism and a tabulator, of means whereby an operation of said tabulator while the carriage return mechanism is in operation will disable said carriage return mechanism and stop its operation.

2, In a typewriting or like machine, the" combination with a carnage, an electric" motor, means actuated thereby for returning said carriage, and .a tabulator, of means whereby an operation of said tabulator will break the circuit of said motor.

3. In a typewriting or like machine, the

' combination with a carriage, an electric motor, means actuated thereby for returning said carriage. anda tabulator including a key, of means acting to prevent current from flowing through said motor while said key is operated.

4. In a typewriting or like machine, the combination with a carriage, power carriage return mechanism including a clutch and a spring for closing said clutch, and tabulator mechanism including a key, of a device operat'ed by said key and adapted to overcome said spring.

5. In a typewritingror like machine, the combination with a carriage, power carriage return mechanism including a spring operated part for bringing the power mechanism,

into operation, and tabulator mechanism ineluding a series of keys and a universal member operated by each of said keys, of means whereby said universal member when operated acts in opposition, to said spring to prevent or stop an operation of said'power mechanism.

6. In a typewriting or like machine, the combination of a carriage; a tabulating mechanism including operating keys and tabulator stops; a normally quiescent electrical motor mechanism for returning the carriage; means for closing the motor circuit and energizing the motor at the end of the carriage travel, whereby the carriage may be returned to its first position automatically; and means connected with the tabulator keys for preventing closure of the motor circuit while any of the tabulator keys is held operated and a tabulator stop projected, whereby when the carriage arrives at the end of a line under the action of the tabulator mechanism said carriage is unable automatically tothrow into operation the motor returning mechanism while any tabulator key is held actuated, thereby preventing

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