US2364556A

US2364556A - Telegraphone

Info

Publication number: US2364556A
Application number: US511759A
Authority: US
Inventors: Richard M Somers
Original assignee: Thomas A Edison Inc
Current assignee: Thomas A Edison Inc
Priority date: 1943-11-24
Filing date: 1943-11-24
Publication date: 1944-12-05
Anticipated expiration: 1961-12-05

Description

R. M. SOMERS Dec. 5, 1944.

TELEGRAPHONE Filed Nov. 24, 1945 2 Sheets-Sheet l Z'mnentor Richard M: Sewers Gttorneg Dec. 5, 1944, R M, ISQMERS 2,364,556

TELEGRAPHONE Filed Nov. 24, 1945 2 Sheets-Sheet 2 (Ittorneg Patented Dec. 5, 1944 TELEGBAPHONE Richard M. Somers, West Orange, N. 1., assignor to Thomas A. Edison, Incorporated, West Orange, N. J., a corporation of New Jersey Application November 24, 1943, Serial No. 511,759

12 Claims. (01. 179-1003) This invention relates to telegraphones and more particularly to novel and improved control arrangements for telegraphones which are adapted to record and/or reproduce a multiplicity of times along the length of a magnetic tape in laterally spaced or contiguous lines or lanes of the tape. y

In such telegraphones there is provided a translating means which is conditionable selectively for coaction with successive lanes of the tape. The translating means may comprise a single tone head which is movable by steps across the tape for coaction with successive lanes of the tape; typically, however, there is provided a plurality of stationary tone head which are ofiset from each other transversely across the tape, and the selective conditioning is performed by connecting the tone heads selectively with the audio circuit of the machine, the audio circuit serving to feed electrical oscillations to the tone heads during recording and to receive electrical oscillations from the tone heads during reproducing. In operation, the tape is driven in one direction while the audio circuit is connected to one of the tone heads. When the tape has reached the end of its travel it is next driven in the reverse direction while the audio circuit is connected to another one of the tone heads, this procedure being continued until each tone head has operatively scanned the tape and all lanes are recorded upon or reproduced from as the case may be. Usually, the tone heads are selected consecutively in the order of their positioning across the record so that operation of the machine will proceed from one lane back along the next adjacent lane, etc.

The tape is provided on reels, and for instance in recording when a reel of the tape has been fully recorded upon and that recordation is to' be preserved or transcribed and later erased or obliterated, the tape is removed from the machine and replaced by another reel. To facilitate this replacement while to maintain the tape and tone heads in correct operative association with each other, the tape and tone heads are typically supplied as part of a unitary magazine, and this magazine is removably mounted on the main housing of the machine so that it may be readily removed and replaced by another.

It is known in these telegraphones to reverse automatically the drive mechan sm for the tape at the end of travel of the tapein each direction and concurrently to connect the audio circuit to the tone heads consecutively in a predetermined sequence. Although it is highly important that recordation on a new reel of tape shall always start at a predetermined lane and in a predetermined direction of travel of the tape and progress from that lane to succeeding lanes in a predetermined sequence, in the past it has been necessary for the operator to perform a special manipulation on the machine to condition it for starting operation on a first or starting lane. This is objectionable for several reasons: Firstly, it is an extra manipulation in operating the machine which, in recording dictation, tends further to draw the operators attention to the mechanism of the machine and away from the subject matter to be recorded; and secondly, it is an independent manipulation which the operator may forget to perform with the result that he may use the machine improperly with consequent loss of intended recorded matter and of his time.

It is a general object of my invention to provide a simple control system for telegraphones and one which is adapted to prevent misoperations of the character abovementioned.

It is another object to provide automatic control means for telegraphones which will positively cause the machine to begin operation on a predetermined lane of the magnetic tape and in a predetermined direction of travel of the tape.

It is another object to operate such control means automatically and in proper sequence as an incidence to performing a normal and necessary operation in the use of the machine.

It is another object to provide improved means for selectively conditioning the machine for operation on different lanes of the magnetic tape.

It is a. further object to restore such conditioning means automatically to an initial or start position as an incident to replacing the magazine on the machine.

It is a further object to latch the magazine in position on the main housing and to automatically restore the conditioning means abovementioned to initial position as an incident to operating the latch for the magazine.

A further object is to provide an improved actuating mechanism for such conditioning means, and means to restore the actuating mechanism itself to an initial or start position upon remounting the magazine onto the machine.

Other and allied objects of my invention will more fully appear vfrom the following description and. the appended claims.

In the description of my invention reference is had to the accompanying drawings, of which:

Figure lis a perspective view of a telegraphone incorporating my invention, the magazine of the telegraphone appearing in raised position above the main housing to show interior parts of the machine;

Figure 2 is a bottom view of the magazine, with a side portion of the casing however reig ire 3 is a vertical section of the magazine taken substantially on the line 1-3 of Figure 4;

Figure 4 is a' top plan view of the magazine, taken substantially on the line 4-4 of Figure 3;

Figure 5 is a partially sectional view showing a portion of the magazine and main housing in assembled relation as seen from the line 5-5 of Figure 4; and

Figure 6 is a diagrammatic view of circuits and mechanism according to my invention.

In Figure 1 there appears a telegraphone which comprises a main housing I and a magazine 2. the magazine is removably mounted on the main housing in any suitable manner, but is preferably made to constitute a cover portion for the main housing and is adapted to be removed by being raised vertically therefrom. In the magazine, as appears in Figures 2, 3 and 4, there are two

reels

3 and 4 for a magnetic tape 5. These reels are journalled by means of studs l and l to a frame plate I, and this plate is held by screws 9 at the comers thereof to a casing in for the magazine. For the difl'erent directions of travel of the tape, the

reels

3 and 4 serve alternately as supply and take-up reels. For instance, in the direction of travel of the tape indicated by the arrow in Figure 2, the upper right-hand reel 4 serves as a supply reel and the centrally located reel 3 as a take-up reel. Between these reels, as

from reel 4 to reel 8, the tape passes ieftwardly over an idlerpulley ll, then 90 around a drive pulley l2 between this pulley and a springpressed idler pulley ll, next backwardly (Figure 2 being a bottom view of the magazine) and 90 to the right around a second drive pulley l4 between this pulley and a spring-pressed idler pulley l5, and then further rightwardly across another idler pulley II to the reel 3. Between the two drive pulleys l2 and I4 there is a translating means ll in operative relation with the tape. In

order that the tape may be held taut as it moves past this translating means it is always driven by the drive pulley which is ahead of the translating means in respect of the direction of travel of the tapei. e., by pulley l4 for the direction of travel of the tape indicated by the arrow in Figure 2.

The drive pulleys l 2 and i4 are driven by shafts l8 and [9 which are joumalled within the main housing and extended slightly above the top plate la of this housing as shown in Figure 1. These shafts have diametrical grooves Isa and Isa in their projecting ends and the drive pulleys have corresponding tongues He and Na which form separable drive couplings between the shafts and pulleys when the magazine is mounted. The shafts l8 and I! are driven by a suitable motor shown diagrammatically in Figure 6. This motor is also coupled to a pair of rotatable wheels 2| and 22 which are journalled in the main housing and which extend slightly above the level of the top plate la. These wheels have annular frictional driving surfaces 2la and He that are adapted to engage the bottom faces of the

reels

3 and 4 respectively when the magazine is in mounted position.

In operation of the machine the tape is held in driven engagement with the drive pulleys l2 and i4 by the respective idler pulleys l3 and i5, and one or another of the drive pulleys is driven iii) assess o at constant speed to move the tape with constant velocity past the translating means I I. Simultaneously, the take-up reel is slightly overdriven with frictional slip to take up the tape as fast as it is supplied from the drive pulley, the supply reel being now freely journalled to permit the tape to be pulled therefrom. For the reverse direction oi travel of the tape, the other drive pulley isdriven, and the take-up reel-the supply reel just considered above-is now overdriven with frictional slip to take up the supply of tape from the drive pulley.

For reversing the direction of travel of the tape, I preferably reverse the direction of rotation of the motor 20, and for this reason I show the motor as being of a shunt type depending for its direction of rotation upon the relative polarity supplied its shunt field "a and armature Ill). The mechanism for so reversing the motor is hereinafter described in detail. However, the mechanism for alternately coupling the motor to the different drive pulleys and reels in the manner above explained is well brown in the art and need not be herein described other than by the statement that it is operated to couple the motor to the different drive pulleys and reels upon each reversal in rotation of the motor.

A pair of leads as having a plug 2! for connection with a power line (not shown) constitutes the power supply circuit for the machine. The

shunt neld 28a of the motor may be connected directly across these leads II, but the armature 20b of the motor is connected across these leads through a reversing switch ll diagrammatically shown in Figure 6. This switch may typically comprise a series of pairs of terminals ii, the succeeding pairs of which are interconnected in criss-cross relationship and the number of such interconnected pairs being as many as the number of lanes on the tape to be recorded upon. The last of these pairs is connected directly to the leads 2!, but there may be one additional vacant pair Ila of such terminals which represent stop terminals for the motor. Associated with the terminals Ii is a pair of movable contacts 32 connected by leads 32 directly across the armature. When the contacts 32 move from one pair of terminals II to the next, the polarity of the armature 20b is reversed relative to' the fixed polarity of the shunt field 20a, and the direction of rotation of the motor is thereby reversed; however, when the contacts I2 reach the vacant terminals Ila, the power to the armature is shut off and the motor comes to a standstill.

The translating means I] comprises a series of tone heads 23 which are spaced longitudinally along the tape and offset consecutively from each other transversely across the tape. Typically, there may be eight of these tone heads, but so as not to encumber the drawings only four are herein shown. Each of these individual tone heads comprises a pair of serially connected electromagnets 23a which are positioned axially in line with each other at opposite sides of the tape.

These electromagnets have core pieces 23b made of a highly permeable material, such as that known as Mumetal. The adjacent ends of the core pieces constitute pole shoes which slidably engage the tape. Since the tone heads are offset from each other, they coact with laterally spaced and longitudinally extending lanes of the tape. 'I'o condition the translating means for operation on any one of the lanes of the tape it is only necessary to connect the audio circuit of the maascauo chine with the tone head corresponding to that lane.

The audio circuit of the machine is herein sufficiently illustrated as being for recordation purposes only. For this purpose it comprises an amplifier 25 within the main housing I and a microphone 26 connected to the input of the amplifier. Across the output terminals 21 of the amplifier the tone heads 23 are selectively connected as is described in the following paragraphs.-.0perating power for the amplifier is supplied by the leads 28.

The switch 39 has another set of terminals 34, in addition to the pairs 3| above described (see Figure 6), which are connected by leads 34a to one side of the tone heads 23 respectively. A movable contact 35 is connectable selectively with the terminals 34 and has a fixed direct connection 21a to one of the output terminals 21 of the amplifier. The other output terminal 21 of the amplifier has a common lead connection 21b to the other side of the tone heads 23.

All of the

movable contacts

32 and 35 of the switch 39 are adapted to move together. Thus, upon operating the switch to successive positions to alternately reverse the motor as above explained, the tone heads will be connected successively to the output of the amplifier. Typically, the tone head connected to the amplifier when the switch 39 is in its most leftward position-the position it occupies in Figure 6-wi1l be one registering with the lane adjacent an edge of the tape, and the succeeding tone heads connected to the amplifier as the switch is operated progressively to the right will be positioned consecutively by equal intervals across the tape. Under these conditions it is desirable always to start operation with the switch 39 in its most leftward position, which position I herein term the initial or start position of the switch.

The switch 39 may be conveniently of the rotary type as shown in Figure 5, and may have the twin set of terminals 3| and additional set 34 circularly arranged and offset axially along the switch. The

movable contacts

32 and 35 may be carried rotatably on a shaft 36. The switch is preferably mounted within the housing I on the top plate la with its shaft 36 projecting through an opening 36a in this plate.

Since the switch 39 is mounted within the housing I and the tone heads 23 within the magazine 2, it is necessary in order to permit removal of the magazine that there be separable electrical connections in the leads 34a between the terminals 34 and the tone heads and in the lead 21b between the tone heads and the amplifier. For this reason the tone heads are connected individually to pins 89 and commonly to a pin 8| as shown in Figures 2 and 4, and these pins project downwardly from the magazine for engagement respectively with a series of sockets 82 provided in the top plate la of the housing as shown in Figure 1.

The actuating mechanism for the switch 39 is provided within the magazine 2 and comprises a ratchet wheel 31 secured to a shaft 38 that is journalled to the frame plate 8 and extended downwardly therebelow. This shaft has a coupling head 39 on its lower end which is provided with a diametrical tongue 39a. On the upper wheel. For operating the ratchet wheel there is a feed pawl 4| pivoted at 42 to a slide member 43, this slide member having slots 44 through which pass stud bolts 45 for slidably mounting the member to the frame plate 8 for reciprocative leftward and rightward movement. A tension spring 46 connected to a short arm 4Ia of the feed pawl serves both to bias the pawl counterclockwise against a pin 41 on the frame plate 8 and to normally hold the slide member and pawl in a retracted, leftward position. Loosely pivoted at 48 to the slide member is a pair of levers 49 and 59 whichhave respective fixed pivots 5| and 52 to the frame plate 8. The lever 49 extends rearwardly from the slide member 43 and terminates in a finger 53 that extends downwardly through an opening 54 in the plate 8. The lower portion of this finger is slotted to receive the tape 5 as is shown in Figures 2 and 4. Similarly, the other lever 59 extends forwardly from the slide member and terminates in a finger 55 that extends downwardly through an opening 56 in the frame plate, and this finger is also slotted to receive the magnetic tape 5.

On each end portion of the magnetic, tape 5 there is secured a small block 51, one of which is shown in Figure 2. As the tape nears the end of its travel in either direction, one of these blocks will impinge against the finger of one of the levers 49 and 59 to move the slide member 43 to the right. As the slide member is so moved the feed pawl 4| engages the ratchet wheel and turns it counterclockwise, as viewed from the top, to operate the switch 39 from one position to the next. As above explained, each operation of the switch 39 reverses the motor 29 and connects the tone head from one amplifier to the next. When the tape is reversed in its direction of travel the block 51 moves away from the lever 49 or 59 last actuated, and the slide member 43 and feed pawl are returned by the spring 46 to their retracted positions. The ratchet wheel is held however in its operated position under the influence of a holding pawl 58 pivoted by a pivot screw 59 to the frame plate 8 and biased by tension springs 69 against the ratchet wheel. When the tape again reaches the end of travel in its reversed direction, the operations just described are repeated with the switch 39 being operated to its successive position to again reverse the motor and connect the amplifier to the next successive tone head.

The switch 39 may also be operated manually to successive positions by means of a pin 83 which extends upwardly from the slide 43 through an opening 84 in the top wall of the magazine.

To provide a visual indication of the lane of the tape on which the machine is operating, there is provided a disk 85 on the top of the ratchetwheel 31, and on this disk there are numbers for the successive teeth of the ratchet wheel. In the top wall of the casing there is an opening or window 81 exposing that number of the disk representing the lane being operated The magazine is located relative to the main housing by the engagement of a conical pin 61 thereof with a hole 68 in the top plate la and of a second conical pin 69, provided as part of the coupling head 39, with a central hol 19 in the corresponding coupling head 49. For releasably holding the magazine in mounted position, there is a, latch between the magazine and housing. This latch comprises a lever 62 within the magazine which is pivoted to the right-hand portion of the frame plate 8 by the aforementioned screw 59. This lever extends leftwardly from its wardly through a slot 65 in the front wall of the casing ID of the magazine. The lever is biased counterclockwise by a spring 66 against a stop member constituting one of the aforementioned stud bolts 45. When the magazine is in mounted position, the catch fingers 63 extend through holes H in the top (plate la and the hook p0rtions of these catch fingers underlie the top plate to latch the magazine in mounted position. To remove the magazine, the lever 62 is turned clockwise by pressing the arm 64 rearwardly. This releases the catch fingers from the top plate la permitting the magazine to be then raised vertically, it being understood that all operative couplings and connections between the magazine and housing are of the separable type, as above explained, to permit the magazine to be so removed.

To remount a magazine on the housing, the locating 'pins 61 and 89 are first brought into engagement with th respectively corresponding

holes

68 and 10, and then the magazine is pressed downwardly'into mounted position. As the magazine is so pressed downwardly, the edges of the hole H in the top plate la engage the under sides 63a of the catch fingers 63, which are inclined as shown in Figure 3, and cam these fingers back so that they will pass through the holes H, the fingers being then snapped forwardly'under the influence of the spring 88 to latch the magazine in position.

When all lanes of the magnetic tape have been recorded upon, the magazine will be removed for preservation of the recording or to have the recordation transcribed and later erased or obliterated. In accordance with my invention, upon replacing a magazine on the main housing I, the switch 30 is automatically restored to initial position, and assurance is had that the machine will start operation on the first of the series of lanes of the magnetic tape and in the proper direction of travel of the tape without any special attention or manipulation being required on the part of the operator. In a preferred embodiment of my invention, the switch so and actuating ratchet wheel 31 are independently biased in clockwise directions toward respective initial positions, the switch being biased by a torsional spring 12 between the shaft 36 and the frame of the switch and the ratchet wheel by a torsional spring 13 between the coupling head 39 and frame plate 8. The initial position of the switch may be definedby stop means within the switch mechanism itself, and that of the ratchet wheel by the abutment of a tooth 8511 on the disk 85 against a pin 86 on the frame plate 8, the initial positions being such that the coupling heads 39 and 40 will be aligned for engagement with each other. On the lever 62 there is a lug 16 which, as the lever 62 is turned to unlatch the magazine, is impinged against the holding pawl 58 to disengage it from the ratchet wheel. Thus, as an incident to removing the magazine, the switch 30 and ratchet wheel 38 are automatically returned by the springs 12 and I3 to initial positions.

While the magazine is removed, the switch 30 will be retained in initial position by the spring 12, but the ratchet wheel of the magazine may be operated from initial position as an incident to the reproduction of recorded matter on the tape 5 or by manipulation of the finger piece 93. It is however a feature of the present invention that the ratchet wheel shall be released automatically as the magazine is remounted, for as the magazine is pressed downwardly onto the main housing the edges of the aperture II in the top plate Ia engage the lower inclined surfaces 63a of the catch fingers 63 and cam the latch lever clockwise to disengage the holding .pawl 58. Of course, it is necessary that the holding pawl be released well before the coupling heads 39 and 40 engage, but this is accomplished by connectingthe hook portions of the catch fingers 63 relatively wide-4. e., angularly wide relative to the pivot 59and by making the tongue 39a on the coupling head 39 relatively short.

It will be understood that my invention may be carried out either by mechanically-operated means or, alternatively, by a suitable electricallyoperated means. However, I preferably employ a mechanically-operated means such as I have hereinabove described, for then I obtain a wholly positive and reliable operation which does not depend upon the availability of a source of electrical power or of connection of the operating means to that source such as would be the case were an electrically-operated means employed.

The embodiment of my invention hereinabove illustrated and described in detail is intended to be illustrative and not limitative of my invention, for the same is subject to changes and modifications without departure from the scope of my invention, which I endeavor to express according to the following claims.

I claim: I

1. In a telegraphone including a main housing, a magnetizable tape, and a translating means mounted in operative relation to said tape and conditionable for coactlon selectively with adjacent longitudinally-extending lanes of the tape: the combination of a magazine removably mounted on said housing and including said tape and translating means; control means operable from an initial position into successive positions for conditioning said translating means for coaction with successive lanes or said tape; and a mechanism for placing said control means into said initial position upon replacing a magazine on the housing, said mechanism comprising an operative element on said housing and a cooperating magazine-carried element.

2. In a telegraphone including a main housing, a magnetizable tape, a plurality of tone heads mounted in operative relation to said tape and operating consecutively across the tape for coaction with consecutive longitudinally-extending lanes of the tape, and an audio circuit for said tone heads: the combination of a magazine removably mounted on said housing and including said tape and tone heads; switch means having a first position for connecting said audio circuit to a first one of said tone heads and movable into successive positions for connecting said audio circuit to the remaining tone heads successively; means for restoring said switch means to said first position; and means, controlling said restoring means, to cause said switch means to be restored as an incident to replacing a magazine on said housing, said means comprising an operative element carried by said housing and a cooperating magazine-carried element.

3. In a telegraphone including a main housing, a magnetizable tape, a reversible mechanism for driving said tape alternately in opposite directlons, a plurality of tone heads mounted in operative relation to said tape and onset transversely across the tape, and an audio circuit for said tone heads; the combination of a magazine removably mounted on said frame and including said tape and tone heads; control means operable from an initial position into successive positions for connecting said audio circuit to successive ones of said tone heads selected in a predetermined sequence and for reversing said drive mechanism upon each change in connection of said audio circuit from one of said tone heads to the next; and a mechanism for restoring said control means to initial position as an incident to removing said magazine, said magazine comprising cooperating elements carried by said housing and magazine respectively.

4. In a telegraphone including a housing, a magnetizable tape, a reversible drive mechanism for said tape, a pluralty of tone heads onset consecutively across said tape for coaction with consecutive longitudinally-extending lanes of the tape, and an audio circuit for said tone heads: the combination of a magazine removably mounted on said frame and including said tape and tone heads; control means actuated into successive positions at the end or travel of the tape in each direction for successively connecting said tone heads to said audio circuit and concurrently reversing said drive mechanism; and a mechanism for causing said control means to be restored to initial position as an incident to a change in mounting of the magazine relative to said housing, said mechanismeomprising cooperating elements on said magazine and housing respectively.

5. In a telegraphone includinga housing, a reversible tape-driving mechanisrn'arid a magazine including a magnetizable tape'and magnetic translating means associated with said tape: the combination of mounting means on said housing adapted to permit the magazine to be removed and replaced by another; means operable for reversing said drive mechanism; and means including a part on said housing and a coacting magazine-carried part, for controlling said reversing means to cause said drive mechanism to be conditioned for driving said tape in a predetermined direction upon each replacement of a magazine on said housing.

6. In a telegraphone including a housing, a removably mounted magazine on said housing including a magnetizable tape and a plurality of tone heads mounted in operative relation to said tape and oilfset transversely thereacross, a reversible tape-driving mechanism carried by said housing and having separable drive connection to said magazine, and an audio circuit for said tone heads: the combination or control means on said housing operable from an initial position into successive positions for connecting said andio circuit and successive ones of said toneheads selected in a predetermined sequence and for concurrently reversing said drive mechanism upon each change in connection of said audio circuit from one of said tone heads to the next; means included in said magazine and actuated at the end of travel of said tape in each direction for successively operating said control means, said means having separable operating connections with said control means permitting removal of said magazine; means for restoring said control means to initial position upon removing said magazine from said housing; and means, 16-

operatively interposed between said magazine and housing and rendered eiiective upon change in mounting of the magazine relative to the housing, for restoring said operating means to initial position corresponding to that of said control means.

7. In a telegraphone including a housing, a removably mounted magazine on said housing including a magnetizable tape and a plurality of tone heads mounted in operative relation to said tape and oirset transversely thereacross, a reversible tape-driving mechanism carried by said housing and having separable drive con-- nections to said magazine, and an audio circuit for said tone heads:- the combination of control means on said housing operable from an initial position into successive positions for connecting said audio circuit with successive ones of said tone heads selected in a. predetermined sequence and for concurrently reversing said drive mechanism upon each change in connection of said audio circuit from one of said tone heads to the next; means included in said magazine and actuated at the end of travel of said tape in each direction for successively operating said control means, said means having separable operating connections with said control means permitting removal of said magazine; and means on said mechanism manipulatable to cause both said control means and operating means therefor to be restored to initial positions.

8. The subject matter as set forth in claim '7 further including a latch for holding said mechanism to said housing; and means to release said latch by said manipulatable means.

9. In a telegraphone comprising a main housing, a magnetizable tape, a plurality of tone heads operatively associated with said tape and ofiset from each other transversely across the tape, a reversible drive mechanism for said tape and an audio circuit for said tone heads: the combination of a magazine removably mounted on said. housing and including said tape and tone heads; control means operated successively at the end of travel of the tape in each direction for connecting said audio circuit to suecessive ones of said tone heads selected in a predetermined sequence and for concurrently reversing said drive mechanism; a latch for releasably holding said mechanism to said housing; and means operatively connecting said latch with said control means, for causing said control means to be restored as an incident of releasing said latch to permit removal of said magazine.

10. In a. telegraphone comprising a. main housing, a magnetizable tape, a plurality of tone heads operatively associated with said tape and offset from each other transversely across the tape, a reversible drive mechanism for said tape and an audio circuit for said tone heads: the combination of a magazine removably mounted on said housing and including said tape and tone heads; control means operable from an initial position into successive positions for connecting said audio circuit to successive ones of said tone heads and for concurrently reversing said drive mechanism upon each change in connection of said audio circuit from one of said tone heads to the next; actuating means within said magazine for successively operating said control means at the end of travel of said tape in .each direction; releasable latch means for holding said magazine in mounted relationship with said housing; and means, operatively connecting said latch means with said control and actuating means and rendered eii'ective upon movement of said latch means to released position, for restoring said control and actuating means to initial positions. a

11. In a telesrap one comprising a main housing. a magnetiaable tape, a plurality of tone heads operative]: associated with said tape and oflset from each other transversely across the tape, a reversible drive mechanism for said tape and an audio circuit for said tone heads: the combination of a magazine removably mounted on said housing and including said tape and tone heads; control means operable from an initial position into successive positions for connecting said audio circuit to successive ones of said tone heads and for concurrently reversing said drive mechanism upon each change in connection of said audio circuit from one of said tone heads to the next; actuating means within said magazine separably connected to said control means for successively operating said control means at the end of travel or the tape in each direction; means for restoring said control means to initial position upon the same being discomected iron: said actuating means incidental to removing said magazine; and means, including cooperating elements on said magazine and housing and operated upon placing said magazine in mounted position relative to said housing, for causing said actuating means to be restored automatically to initial position and the actuating means to be operatively coupled to said control means in the sequence here named.

12. In a telegraphone including a main housing, a magnetizable tape and a translating means for coaction with said tape: the combination oi a magazine removably mounted on said housing and including said tape; control means operable from an initial position into successive positions for conditioning said translating means for coaction with successive longitudinally-extending lanes of said tape; and a mechaso nism, including an element on said housing and a cooperating element on said magazine and operated upon removal of said magazine from said housing, for restoring said control means to initial position.

RICHARD M. SOMERS.