Jan. 1, 1935. 1,986,026

N. H. SUREN ET AL S IGNAL TRANSMITTER Filed Jan. 24, 1931 14 Sheets-Sheet l INVENTORS NATHAN H. SURE N AND HARRY 5. SMITH ATTORNEY Ja 935- N. H. SUREN ET AL 6 SIGNAL TRANSMITTER Filed Jan. 24, 1931 14 Sheets-Sheet 2 Fig. 3.

INVENTORS NATHAN H. SUREN AND HARRY s. SNHTH ATTORNEY Jan. 1, 1935. N H SUREN A 1,986,026

SIGNAL TRANSMITTER Filed Jan. 24, 1931 14 Sheets-Sheet 3 Q Q m Q li (0 Q N i N N o no N to m 00 Q a: L

fir 5 6 I N N s N M an o o -iwn Q (0 Q Q Q Q (Q 9 3B 8 M .3 r N N 9 I N Q N O N $1 S m N N 5 \0 g Q 9 Y N N 01 K4 5 am 2Q N 00 N f N NATHAw Ei S U EN AND BY HARRY $.SMITH ATTORNEY Jan. 1, 1935. N. H. SUREN ET AL 1,986,026

SIGNAL TRANSMITTER Filed Jan. 24, 1951 14 Sheets-Sheet 4 INVENTORS 7 NATHAN H. SUREN AND HARRY. 5. SMITH ATTORNEY Jan. 1, 1935. N. H. SUREN ET AL 1,936,026

SIGNAL TRANSMITTER Filed Jan. 24, 1931 14 Sheets-Sheet 5 Ti .6. IZD 5 24 INVENTORS NATHAN H. SUREN AND BY HARRY 3 SMITH ATTORNEY Jan. 1, 1935. N SUREN 5 AL 1,986,026

S IGNAL TRANSMITTER Filed Jan. 24, 1951 14 Sheets-Sheet 6 INVENTORS NATHAN H. SUgEgl AND ATTORNEY Jan. 1, 1935. SUREN ET AL 1,986,026

S IGNAL TRANSMITTER Filed Jan. 24, 1931 14 Sheets-Sheet 7 INVENTORS I NATHAN H. SUREN AND HARRY s. SMITH ATTORNEY Jan. 1, 1935. N, H, SUREN AL 1,986,026

SIGNAL TRANSMITTER Filed Jan. 24, 1931 14 Sheets-Sheet a I I59 I62 M 411 I] H! llllllll Illllll II fl I68 A: I I 1 122 12+ as W15 ...T., 2 342 I'll v 9 I20 82 so 7 T us a: 89 5 ATTORNEY Jan. 1, 1935. N. H. suREN EIAL, 1,986,026

- SIGNAL TRANSMITTER Filed Jan. 24, 1931 14 Sheets-Sheet l0 'F'i .20. Fig.2l. 33 W 9 Z 236 l [I I 242 7 23| zsues 2 l I55 [III I I m! INVENTORS NATHAN H. SUREN AND HARRY 5- MI H ATTORNEY Jan. 1, 1935. N SUREN Er AL 1,986,026

SIGNAL TRANSMITTER Filed Jan. 24, 1951 14 Sheets-Sheet 11 Fig. 23.

I'll I72 I64 I63 I62 INVENTORS AH. suns" an!) Jan. 1, 1935. H U EN ET AL 1,986,026

S IGNAL TRANSMITTER Filed Jan. 24, 1931 14 Sheets-Sheet 12 11 .27; Fig. 2a.

0000 POSITION OF DIGITS 9000 POSITION OF DlGlTS 99 99 POSlTION 0F DIGITS INVENTORS a NATHAN H. suREN AND 4 ARRY 3. SMITH 5M ATTORN ET J 1935- N. H. SUREN ET AL 1,986,026

SIGNAL TRANSMITTER Filed Jan. 24, 1931 14 Sheets-Sheet l5 INVENTORS NATHAN H. suns" mp- HARRY 5.5mm Hi ATTORNEY Patented Jan. 1, 1935 SIGNAL TRAN SMITTEB Nathan 11. Suren as Harry s. Smith, Needham, Masa, assignors to The Gamewell Company,

Newton] Upper Fall Massachusetts s, Man, a comratlonof Application January 24,1931, Serial No. 511,339

16 Claims.

This invention relates to signal transmitters; and more particularly to variable signal initiating station transmitters involving manually operable members for varying the characteristics of signals, both as to their component parts, and as to cycles of operation or repetition of the signals formulated thereby.

An object of the invention is to provide an improved variable signal transmitter, in which is incorporated functions corresponding to the so-- called "non-interference functions of the most highly-developed types of fire alarm boxes.

Another object of the invention is to provide an improved signal transmitter of the above type, in which is incorporated functions corresponding to the so-called "succession functions of such fire alarm boxes.

The term non-interference is intended to designate that characteristic of mechanisms associated with either initiating stations or repeaters whereby such a station or repeater will not act to break a circuit controlled thereby as a result of an attempt made at a time when some other signal is in course of transmission over such circuit, and whereby should several such stations (or a repeater and one or more stations) break a circuit simultaneously, all except one will relinquish control of such circuit before an improper break occurs; and whereby any station or repeater having found a circuit busy, or having relinquished it in favor of another which started simultaneously therewith, will refrain from breaking such circuit until it is fully relinquished by any or all previously controlling stations (or repeater).

The term succession is intended to designate that characteristic of mechanism of initiating stations whereby any station having relinquished its circuit in favor of another station (or repeater) will automatically act to renew its attempt to transmit its signal only after the conclusion -of such previously controlling signal.

From the foregoing it will be apparent that signal transmitters of types falling within the scope of the present invention are adapted for use in circuits including other signal initiatingmechanisms; however, certain features of this invention are also suited for independent use in signal transmitters employed under service conditions not requiring the succession function, as well as under conditions not requiring either the succession or the non-interference functions, as when connected in circuits which do not include other signal initiating stations.

According to the present invention a manually controlled apparatus is provided which is particularly adaptable to fire alarm systems where speedy conditioning for accurately-formulating predetermined groups of signaling impulses, is required. The impulse actuations set up in the mechanism furnish a series of beats or impulses over an electric circuit, the characteristics of which are such that the impulses may readily be picked up and carried to a signaling finality in gongs or other suitable signal devices characteristically found in flre apparatus houses and other sub-stations. The character of signal transmission is such that the interval occurring between groups of impulses within a signal are greater than those between the impulses of a group, and those preceding each repetition of a signal are greater than those within any signal.

More specifically the invention contemplates an improved signal transmitter of a type wherein the signal impulses are sent out, through the agency of transmitting circuits, bya contact actuating mechanism in the form of two toothed signaling wheels, which are rotated by suitable mechanism, for the accurate timing of the required circuit changes.

The invention also contemplates suitable mechanism which provides for positive registered interpretation, mechanical actuation and electrical propagation of a series of signals, the mechanism having embodied therein a sub-mechanism capable of dial registration of the code signal to be transmitted, a releasing means for the same, and means for starting and automatically terminating the functioning of the apparatus when the predetermined number of rounds have been transmitted.

Another object of the invention is to provide an improved signal transmitter of the character mentioned which is simple in construction, and reliable and exact in function under all conditions of service.

The invention also comprises certain new and useful improvements in the construction, arrangement, and combination of the several parts of which it is composed, as will be hereinafter more fully described and claimed.

For the purpose of enabling this invention to be more readily understood, an embodiment thereof is hereinafter described, and is shown in the annexed drawings, in which:

Figure 1 is a front elevation of a signal transmitter embodying the invention;

Fig. 3 is a plan of the transmitter mechanism 2 with certain parts omitted, the remaining parts 'being shown in non-set positions;

Fig. 4 is a rear elevation of the structure shown in Fig. 3;

Fig. 5 is a view partially in section, of a portion of the structure of Fig. 3, showing the parts as positioned when set for a signal;

Fig. 6 is a vertical section taken on the line 6-6 of Fig. 5;

Fig. 7 is a vertical fragmentary section taken on the line 7-7 of Fig. 3 showing a portion of the digit setting mechanism, the parts being shown in non-set positions;

Fig. 8 is a view similar to Fig. 7, showing the parts positioned as when all of the digit plates are set at 1 position;

Fig. 9 is a vertical transverse section taken on the line 9-9 of Fig. 3, looking toward the rear of the intermediate frame plate;

Fig. 10 is a vertical transverse section taken on the line 10-10 of Fig. 3, with certain parts omitted;

Fig. 11 is a vertical section showing the manner of driving the index wheels associated with the digit plates;

Fig. 12 is an irregular horizontal section taken approximately on the line 12-12 of Fig. 1;

Fig. 13 is a detail perspective of the latch levers on one side of the index wheels;

Fig. 14 is a similar view of the latch levers on the opposite side of the index wheels;

Fig. 15 is an inverted plan of a portion of the indexing mechanism and the locking mechanism therefor; V

Fig. 16 is a vertical section taken on the line 16-16 of Fig. 1 showing the parts as when positioned for the digit 5";

Fig. 17 is an irregular vertical sectiontaken approximately along the line 17-17 of Fig. 1, showing the parts as when positioned for the Fig. 18 is a plan of a portion of the driving mechanism and the parts associated therewith;

Fig. 19 is a vertical section taken on the line 19-19 of Fig. 18;

Fig. 20 is a fragmentary inverted plan showing a portion of the starting mechanism;

Fig. 21 is a side elevation of a portion of the machine, showing particularly the starting and stopping mechanism;

Fig. 22 is a fragmentary vertical section taken along the line 22-22 of Fig. 3;

Fig. 23 is a detail plan of the structure shown in Fig. 22;

Fig. 24 is a detail rear elevation of the round pause hastening mechanism and associated parts;

Fig. 25 is a fragmentary view of a portion of the structure shown in Fig. 24, the parts being shown in the position in which the teeth of the discs are staggered;

Fig. 26 is a section taken on the line 26-26 of Fig. 24;

igs. 27 to 31, inclusive, are diagrammatic views illustrating the relative positions of the index fingers of the impulse formulating mechanism when the digit plates are set in several positions;

Fig. 32 is a detail perspective of the thrust collar;

Figs. 33 and 34are detail views of other portions of the round pause hastening mechanism;

Fig. 35 is a diagrammatic view of the round pause controlling mechanism; and

Figs. 36, 37 and 38 are diagrammatic views of the circuit controlling means.

Referring to the embodiment of this invention illustratively indicated in the accompanying drawings, the signal transmitter shown may be enclosed in a suitable casing which is generally indicated in Fig. 1, in which the front panel 21 has detachably secured thereto an annular disc 22. This disc constitutes a face plate or dial having associated therewitha plurality of knobs 23, 24, 25, 26, 27, 28 and 29. by means of which the device may be operated and controlled.

The knob 23, (see Figs. 1 and 3) controls the round setting mechanism, the knobs 24, 25, 26 and 27 control the several digit plates and their associated mechanism, the knob 28 controls the restoring mechanism, and the knob 29 controls the starting mechanism. Above the knob 23, the face of the dial 22 is provided with the numerals 1, 2, 3 and 4, which designate the rounds. 0perable by the knob 23, is a pointer 30, which indicates the number of rounds for which the transmitter is set. The knobs 23, 24, 25, 26 and 27 are rotatable, while the knobs 28 and 29 are manually movable toward the dial 22.

The knobs 24, 25, 26 and 27 are arranged in a horizontal row. Above each of these knobs there are openings 20 in the dial, through which numerals on the digit plates may be viewed.

Fastened to the rear face of the dial 22 is a skeleton frame composed of a plurality of spaced frame plates 31, 32 and 33, which are secured together by means of spacer bars 34, 341, 342, 343, 344, 345, 346 and 347.

interposed between the dial 22 and the front frame plate 31, are digit plates 35, 36, 37 and 38, (see Figs. 10, 12 and 1''!) in the form of annular discs of relatively thin sheet metal, provided circumferentially with numerals from 0" to "9", inclusive, as shown in Fig. 2.

The digit plates are respectively mounted on shafts 39, 40, 41 and 42. The shafts extend through the dial 22 and the knobs 24, 25, 26 and 27 are respectively mounted on the outer ends of said shafts.

The digit plate 35 turns with the shaft 39; a collar 43 being fixed upon said shaft, as by means of a pin 260. Projecting from the col-- lar 43, is an arm or crank 44 which carries a pin 45, said pin being made rigid with the arm and being disposed substantially parallel to the shaft 39.

The shaft 39 passes through a bushing 46 which is mounted in the dial 22. The digit plate 35 is provided with an opening 351, for receiving the projecting end of the pin 45.

The shafts 40, 41 and 42 pass through the bushings 461, 462 and 463, respectively, which are mounted in the dial 22 in the manner shown in Figs. 5 and 12.

The shafts 40, 41 and 42 have correspondingly associated therewith the collars 431, 432 and 433, the arms or cranks 441, 442 and 443, and the pins 451, 452 and 453, respectively; which pins pass through openings 361, 362 and 363 formed in the digit plates 36, 3'1 and 38.

The bushings 461, 462 and 463 have formed therein the openings 4'11, 472 and 473 for the reception of the ends of the pins 451, 452 and 453, respectively. These openings are so located that when the ends of the pins 451, 452 and 453 are disposed in said openings the digit plates 36, 37 and 38 will be respectively positioned so that the numeral 0" therein will register with the dial openings 20 associated with the respective digit plates.

when the pins 451, openings 471, 472 and 473, respectively,

452 and 45s are in the the parts moving with the knobs 25, 26 and 2'! will be .yieldingly locked against rotation so that, through the action of the rounded ends of .these pins, the knobs may be rotated with slight force so as to carry the pins out of the openings, whereupon said pins will bear against the smooth surface of the bushings associated therewith.

The ends of the shafts 40, 41 and 42 are reduced slightly in diameter, as indicated at 48 in Figs. 5 and 17. These reduced ends are mounted in openings formed in the intermediate frame plate 32, and the length of such reduced portions is such that when the digit plate pins are in their respectively associated openings in the dial, the shoulders between the reduced end portions 48 and the main body portions of said shafts will be situated a suitable distance from the face of the frame plate 32; so that the knobs and their shafts are movable inwardly of the machine for a distance sufllcient to withdraw the digit plate pins from their dial bushing openings, and for other purposes to be hereinafter more fully described.

Leaf springs 49, 50 and 51 bear againstthe projecting ends of the shafts 40, 41 and 42, respectively; urging such movement of said shafts as will tend to cause the rounded ends of the pins 451, 452 and 453 to bear against the surfaces of the bushings 461, 462 and 463, and to enter the openings 471, 472 and 473, respectively, when the restoring mechanism is operated, as hereinafter more fully explained.

A sleeve 52 is mounted on the shaft 40 between the collar 431 and a gear 53, (see Figs. 3 and 10). The sleeve 52 is provided with a laterally projecting arm 521 having an opening therein, through which projects a rod 55 carried by the frame plate 32. v

A sleeve 56 is likewise mounted on the shaft 41 between the collar 432 and a gear 57. The sleeve 56 is provided with a laterally projecting arm 561 having an opening therein, through which projects a rod 59 carried by the frame plate 32.

Also, as shown in Figs. 3 and 10, the shaft 42 is provided with a sleeve 60, which is mounted on said shaft between the collar 433 and a gear 61. The sleeve 60 is provided with a laterally projecting arm 62 having an opening therein near the end thereof, through which opening there extends a rod 64 carried by the frame plate 32.

Depending from the lower sides of the sleeves 52 and 56 and from the arm 62, are downwardly extending lugs or tips 522, 562 and 65, respectively, the purposes of which will be hereinafter more fully described.

Associated with the knobs 24, 25, 26 and 27 are relatively large annular gears or toothed wheels 66, 67, 68 and 69. The toothed wheel 66 is fixed to a shaft and surrounding said shaft, are tubular sleeves 71, '12 and '73, to which the toothed wheels 67, 68 and 69 are respectively fixed. Also surrounding the tubular sleeve '73 for a portion of its length, is another tubular sleeve 74 which is provided with a gear 155. The gear 155 is adapted to be driven from a spring motor as hereinafter more fully described.

The toothed wheel 66 is operable from the shaft 39, through gears 54, 58 and 63. Said gear 58 is mounted on a shaft 75 carried by the frame plate 32, and said gear 63 is mounted on a shaft 76 and meshes with the toothed wheel 66. Latch levers77 and 78 are also mounted on the shaft 76.

As shown in Figs. 3, 5 and 11, the gear 54 is at all times in operative relationship with the toothed wheel 66, so that it will act to impart the rotary movement of the shaft 39 to said wheel through the gears 58and 63. The gears 53, 57 and 61 are movable with their supporting shafts into and out of operative relationships with the toothed wheels 67, 68 and 69, respectively; the gears 53 and 57 being movable into and out of direct meshing relationship with the toothed wheels 67 and 68, respectively, and the gear 61 being correspondingly associated with the gear- 91, to act through said gear and the gear 92 for imparting the rotary movement of the shaft 42 to said toothed wheel 69.

When the digit plates are in their 0 positions, the shafts 40, 41 and 42 are so positioned that the gears 53, 5'7 and 61 are not in meshing relationship with the toothed wheels 67 and 68 and the gear 91, respectively; thus permitting the toothed wheels 67, 68 and 69 to rotate independ ently of the shafts 40, 41 and 42.

The lug 522 is so positioned with relation to the toothed wheel 66 that when the shaft 40 is moved to a position which carries the gear 53 into meshing relationship with the toothed wheel 67, said lug will be carried into the path of the teeth of said wheel 66 and thereby lock 'said wheel.

The lug 562 and the tip 65 are correspondingly positioned with relation to the toothed wheels 67 and 68, respectively, so that when the position of the shaft 41 is such as to bring the gear 57 into mesh with the wheel 68, said lug 562 will hold the wheel 67 against rotation, and when the position of the shaft 42 is such as to bring the gear 61 into meshing relationship with the gear 91, said tip 65 will hold the wheel 68 against rotation.

Means are thus provided for successively looking the number setting knobs, so that, as they are operated in sequence from left to right, actuation of each knob effects locking of all previously 'set knobs, for the purpose of preventing accidental displacement thereof.

Referring to Figs. 7, 8, 11, 13, 14, 15 and 17, the latch lever 77 is loosely mounted on the shaft 76, and one arm of said lever is provided with a laterally projecting nose 83. The other arm 80 of said latch lever is forked, and one of the limbs thereof is provided with a transversely disposed wedge-shaped pin 81 for cooperation with the teeth of the wheel 66. The lever arm 80 is urged toward the periphery of the toothed wheel 66-by an expansible coil spring 82, which acts against the lower end of said arm 80.

A lug 79 is associated with the gear 54 for cooperation with the nose 83 of the lever 77. Said lug is so positioned with relation to the digit plate 35 that when said plate is in its normal or "0" setting, said lug will act through said nose 83 to cause said lever to be so positioned that the pin 81 will be withdrawn from the path of the teeth of the wheel 66; and so that when said lug has been moved incidental to setting of the digit plate 35 to other than its 0" position, said lever will be permitted to move, responsive to its spring 82, and thereby carry said pin into the path of said teeth.

The projections 85, 98 and 103 are correspondingly associated with the gears 53, 57 and 61, respectively, for similar cooperation with the noses 84, 97 and 102 for acting through the levers 78, and 96 to cause the pins 87, 100 and to be correspondingly moved with relation to the teeth of the wheels 67, 68 and 69, respectively.

From the foregoing it will be apparent that the toothed wheels 66, 67, 68 and 69, constitute index wheels by means of which settings are effected for predetermining the numbers of signaling impulses to be formulated in the respective groups. It will also be noted that through utilization of the wedge formation of the surfaces of the pins 81, 87, 100 and 105 in connection with specially formed teeth provided in the wheels 66, 67, 68 and 69, respectively, as shown, accurate positioning of these wheels, for their various settings, is more readily obtained.

As shown in Fig. 15, the lower ends of the lever arms 86 and 104 are provided with lateral projections 90 and 108 which extend into the paths of projections 89 and 107 which are formed at the lower ends of the lever arms and 99 for at times adding the forces of the springs 88 and 106 to those of the springs 82 and 101, for causing the pins 81 and 100 to be maintained in the paths of the teeth of the wheels 66 and 68, respectively.

An am 109 is fastened to the shaft 76, as best shown in Figs. 7 and 8, and projects upwardly therefrom. A link 110 has one end thereof pivotally connected to said arm and the other end of said link is slotted, as at 111, and engages a pin 112 which is carried by the end of an arm 113 fixed to the shaft 94 and extending downwardly therefrom.

The relation of the arms 109 and 113 and the link 110, to the latch levers 78 and 95, is such that when the noses of said latch levers are supported by the raised portions of the lugs and 98, respectively, the pin 112 will be disposed at the inner end of the slot 111 (see Fig. 7) and so that, as shown in Fig. 8, when the noses of the latch levers are not so supported, the link 110 is retracted and permits the pin 112 to move toward the left so as to position pins and in cooperative relation with the teeth of the wheels 68 and 69, respectively, so that the knobs 25, 26 and 27 may be successively operated to set up a number, without thereby at any stage altering the setting of any previously set tooth wheels and their associated parts.

A stop 118 (see Figs. 6 and 15) projects rearwardly from the front frame plate 31 into the path of a pin 117 carried by the wheel 66.

A coiled spring 141 (see Figs. 5 and 9) is applied between the frame spacer bar 342 and a hub 290 carried by the toothed wheel 69, in such manner as to urge rotation of said wheel in a counter-clockwise direction as viewed in Figs. 7 and 8.

As viewed in Fig. 15, the wheel 69 also carries a pin 124 which is disposed in the path of a pin 122 carried by the wheel 68, and said wheel 68 carries a pin 123 which is disposed in the path of a pin 121 carried by wheel 67, and said wheel 67 also carries a pin which is disposed in the path of a pin 119 carried by wheel 66, so that, unless otherwise held, said spring 141 will act through the wheels 69, 68 and 67, upon the wheel 66, through the pins carried by said wheels, to rotate said wheels in counterclockwise direction to the position in which the pin 117 carried by wheel 66 is brought against the stop 118, thereby bringing said wheels to their respective normal positions, where the digit plates and other parts moving therewith are in their "0" positions, as indicated in Figs. 3, 6, 7 and 11. I

Fixed to the inner or rear end of the shaft 70 is a curvedfinger 125 (see Figs. 4, 23, 25, 26 and 27 through 31). Curved fingers 126, 127 and 128, substantially similar to the finger 125, are fixed respectively to the inner or rear ends of the sleeves 71, 72 and 73. As shown in Figs.

23 and 26, the fingers are disposed in the path of an arm 129 carried by a toothed wheel 130 fixed to the sleeve 74.

Since the'finger 125 is carried by the shaft 70, to which shaft the indexing or toothed wheel 66 is fixed, any movement imparted to said wheel will also be imparted to said finger. Therefore, when the toothed wheel 66 is rotated, the finger 125 will likewise be moved an angular distance corresponding to the movement of the wheel 66. Likewise, the fingers 126, 127 and 128 are responsive to any movements imparted to the indexing or toothed wheels 67, 68 and 69, respectively.

The arm 129 is fixed upon the rock-shaft 142, which shaft is journaled in the wheel 130, so that the arm 129 is carried around the fingers 125, 126, 127 and 128, incident to the rotation of said wheel.

The spring 133 is applied to the arm 129, through a link 134, in such manner as to urge movement of said arm from certain positions thereof toward the fingers 125, 126, 127 and 128; said link, being so formed that, when said arm is moved more than a predetermined distance away from said fingers, the pull of said spring will tend to oppose movement of said arm in the direction of said fingers.

A surface 132 is so formed near the free end of the arm 129, with relation to the finger 128 that when, during the rotation of the wheel 130, such surface is brought into engagement with said finger, the movement thereby imparted to the arm 129 will be sufficient to carry it to a position such that the action of the spring 133 will tend to swing said arm toward a stop pin 137 carried by wheel 130 (see Fig. 25) and surface 131 is formed on said arm adjacent to said surface 132, in such relation to the fingers 125, 126 and 127 that. when said surface is brought into engagement with any one of said fingers incident to the rotation of the wheel 130, said arm will be swung a lesser distance, for a reason hereinafter more fully explained.

The teeth provided in the periphery of the wheel 130 are formed throughout a major portion thereof, but a portion 288 of such periphery is left blank (see Fig. 24).

A disc has teeth formed in the periphery thereof corresponding to those of the wheel 130, so that when placed by the side of said wheel, said disc may be caused to assume such a position that its teeth, and the notches therebetween, will be matched in perfect alignment with those of said wheel; and may assume another position in which they will be so unmatched that the teeth of said disc will be in alignment with the spaces between the teeth of said wheel.

Said disc 135 is journaled upon the sleeve 74, adjacent the wheel 130, for rotation independently thereof.

A pin 148, fixed in the wheel 130, extends through a slotted opening 149 in the disc 135 and projects beyond said disc in the direction of the frame plate 33, terminating in a flattened portion 150 (Fig. 26), for a purpose which will be hereinafter more fully explained. Said opening 149 is so formed as to limit relative movement between said wheel 130 and said disc 135 to such that the teeth thereof may be matched in alignment as shown in Figs. 24 and 33, or unmatched in staggered relationship as shown-in Figs. 25 and 34.

Shaft 142 extends through a slotted opening in disc 135 and has fixed thereon a camplate 144 so formed with relation to a pin 14'! carried by the disc 135 that when said shaft 142 is in the position which it occupies when thearm 129 has been moved by the spring 133 until the free end of the surface 132 thereof rests against the hub of the finger 128, said plate will act through said pin to so position said disc that the teeth thereof will be in matched alignment with those of the wheel 130, and so that when said arm 129 has been moved by engagement thereof with any of the fingers cooperating therewith, said disc mechanism hereinafter referred to as a slow speed train includes the gear 155 fixed to the sleeve 74 and in mesh with a gear 156 on the shaft 154.

The mechanism hereinafter referred to as "a high speed train" is shown as comprising a gear 157 on the shaft 154 which is in mesh with a pinion 158 on a shaft 159. The shaft 159 also carries a gear 160 which is in mesh with a pinion 161 on a shaft 162, which shaft also has fixed thereon a governor device 168 for controlling the rotation thereof under what will be hereinafter referred to as fast speed conditions".

Mounted on the shaft 162 is a clutch device comprising a toothed clutch member 163 fixed to said shaft and a cooperatively toothed clutch member 164 loose on said shaft.

Fixed to the loose clutch member 164 is a gear 165 which meshes with a pinion 166 on the shaft 167, which shaft also carries a governor device 169 for controlling the rotation of said shaft under what will be hereinafter referred to as slow speed conditions.

For the purpose of effecting movement of the loose clutch member 164 into and out of engagement with the fixed clutch member 163, responsive to movement imparted to the arm 129 by engagement of the surface 132 therein with the finger 128, (see Figs. 22, 23, 25 and 26) intervening mechanism is provided as follows:

An arm 170 is pivotally secured to the rear side of the frame plate 33, as at 171, and the outer end of this arm is connected to the clutch member 164 by means of a pin 285, passing-through an end of said arm and through openings provided in the ends of a pair of spaced rods 173 (see Fig. 23) which rods are slidably mounted in the frame plate 33. The heads 287, formed at the free ends of the rods 173, aredisposed in a groove 286 formed in the boss of the loose clutch member 164.

A spring 172 is so applied to the arm 170 as to urge movement thereof to cause the loose clutch member 164 to be moved into engagement with the clutch member 163.

A thrust cam collar 136 (see also Fig. 32) is mounted upon the sleeve 74 for rotation and for axial movement independently thereof; this collar being situated between the disc 135 and the forked inner end of the arm 170 (see Figs. 22 and 23) so that movement of said collar away from the disc 135 will operate the arm 170 to compress the spring 172 and to cause withdrawal of the loose clutch member from engagement with the fixed clutch member 163.

For the purpose of moving the collar 136 away from the disc 135, as just described, three pins 138 are carried by the wheel 130, and extend through suitable openings 319 in the disc 135 and into the notches 139 provided in the collar 136. The openings 319 provided in the disc 135 for the pins 138 are of sufllcient size as to permit required relative movement between said disc and the wheel 130, as heretofore more fully explained. The ends of these pins are rounded, as best shown in Fig. 23, so that rotation of the collar 136 relatively to the wheel 130 will bring the inclined surfaces 140 of the notches 139 in said collar against the rounded ends of said pins and thereby force said collar away from the disc 135.

For the purpose of rotating the collar 136, as

just referred to, a portion of the periphery of said collar is toothed, as indicated at 284 (see Figs. 23 and 32) and a segmental gear 145, is fixed upon the shaft 142 in such position with relation to the arm 129 that, when said arm is in the position to which it is moved by engagement of the surface 132 thereof with the finger 128, said gear 145 will move the collar 136 to a position where the engagement of the inclined slotsurfaces 140 with the ends of the pins 138 will force said collar away from the disc 135 to a position where it will act through the arm 170 and parts moving therewith to disengage the clutch member 164 from its co-engaging member 163.

A portion 283 of the segmental'gear 145 is so formed that when said gear is positioned to cause disengagement of the clutch, as just described, said portion 283 will so extend beyond the periphery of the wheel 130 that the rotation of said gear will carry said portion 283 into engagement with a pin 289 (best shown in Fig. 34) carried by the frame plate 33 and projecting in the path of said portion 283; whereupon, the further rotation of the wheel 130 will cause the segmental gear 145 to move to a position which will cause the inclined surfaces 140 of the collar 136 to be moved out of the path of the pins 138, and will rotate the shaft 142 so that the spring 133 will be applied to the arm 129 below dead center and thereby enable said spring to urge movement of said arm in the direction of the fingers cooperating therewith.

A key break lever 209 is pivotally mounted at 210, on the frame plate 33, and is provided at its free end with a downwardly projecting tooth 211 for cooperation with the teeth of the wheel 130 and disc 135 (see Figs. 4 and 38). The tooth 211 has a step 281 formed therein so that as the wheel 130 and disc 135 are rotated, with their teeth in alignment, the downward movement of the lever 209 incident to the withdrawal of any wheel tooth from the path of its projecting tooth 211, (see'Fig. 38) will first permit said arm to drop to a position where the step 281 rests upon the top of the tooth being withdrawn; and, when such wheel tooth is then withdrawn from the path of said step, a further downward movement of the arm 209 will be permitted. The reason for arresting the downward movement of the arm 209, through the action of the step 281, as just described, will be hereinafter more fully explained in connection with the non-interference mechanism. If, because of service conditions, non-interference mechanism will not be required, the step 281 may be omitted.

A pair of key break contacts 207 and 208 are associated with the key break lever 209, and the contact operating lever 212 is interposed between said key break lever 209 and the contacts 207 and 208, for at times efiectlng suitable actuation of said contacts responsive to operation of the key break lever 209.

As shown, the lever 212 is pivoted at 213, and

in another position, such oscillations of the lever 209 will not cause the lever 212 to be so elevated as to effect functional actuation of the contacts 207 and 208. A spring 220 is applied to the dog 216, urging movement thereof to the position where it will cause functional actuation of the contacts 207 and 208 responsive to the operation of the key break lever 209.

A controlling lever 202, pivoted at 203, carries an armature 204 at an end thereof. for cooperation with the electromagnet 201 (see Fig. 36). The pivotal support 213 for the lever 212 is also carried by the lever 202, and an end of said lever projects in the path of pin 148 carried by the wheel 130, so that said lever will be so swung as to carry the armature 204 into close proximity the wheel is in its normal position. The spring 220 which is applied to the dog 216, as hereinbefore described, is also connected to the lever 202 in such manner as to urge movement of said lever to withdraw the armature 204 from proximity to the magnet 201.

A pointed projection 254 is formed on the upper surface of the lever 212 for cooperatign with the V-shaped end 256 of the pin 255 carried by the frame plate 33. The relationship of the cooperating pointed portions of the projection 254 and V-shaped end 256 are such that movement of the lever 202 to carry the armature 204 away from the magnet 201 will be permitted only when the lever 212 is below the position where it effects closure of the contacts 207 and 208, to a degree greater than permitted while the lever 209 is supported by engagement of the step 281 with the top of a tooth of wheel 130, as shown in Fig. 38.

For the purpose of controlling the starting and stopping of the transmitter thus far described, mechanism is provided as follows:

Referring to Fig. 1, the starting button 29 is mounted on the rod 250 (see Fig. 15) which carries a cone shaped tip 251, cooperating with a pin 249 fixed in the rock shaft 231, so that when said knob 29 is moved toward the dial plate 22, said cone shaped tip 251 will act through the pin 249 to rotate the shaft 231, and thereby effect withdrawal of main detent mechanism, which will be presently described. A spring 252 (Fig. 15) urges movement of the rod 250 in such direction as to carry the knob 29 away from the dial plate 22.

Fixed to said rock shaft 231 is a member 234 having a plurality of arms 235, 236 and 237 (see Fig. 35). Said arm 236 has applied thereto one end of a spring 238, the opposite end of which is secured to the spacer bar 346, for urging rotation of the member 234 in clockwise direction, as viewed in Fig. 35. The arm 235 extends inwardly and terminates in an ofiset portion 239', which is disposed beneath the sleeve 74 in the path of a finger 242 carried by said sleeve and a projection 243 moving with the arm 244 (see also Fig. 20) for a purpose which will be more fully explained.

For the purpose of conditioning the transmitter for causing the formulation of one or more repetitions of signals for which it is set, after the initial formulation thereof,mechanism is provided as follows:

The rotary knob 23 is provided with a pointer 30 associated with'numerals "1 2 3 4" formed in the dial 22, as shown in Figs. 1 and 35. Said knob is fixed upon a hollow shaft 178 (see also Fig. 3) upon which shaft the sector 179 is also fixed. The pawl 180, carried by the spring cooperates with the notches 181, 182, '183 and 184 formed in the sector 179, for locating and retaining same in its various positions. The abutments 189 and 190 are situated in the path of the sector 179 for suitably limiting the movement thereof. I

A link 188 connects the sector 179 with an arm 187 which is fixed on the shaft 186. The toothed wheels 193 and 196 are journaled upon said shaft 186 for rotation independently thereof, and the arm 191 is fixed upon said shaft 186, the free end of said arm being disposed in the path of a pin 192 carried by the wheel 193. A spring 194 is so applied to the wheel 193 as to urge movement thereof in counter-clockwise direction, as viewed in Fig. 35, and thereby maintain the pin 192 in engagement with the free end of the arm 191 so that, unless otherwise held, said wheel 193 will be moved, tooth for tooth, in accordance with movements imparted to the sector 179 through the actuation of the knob 23.

A pin 271 is secured in the frame 33, in the path of a pin 272 carried by wheel 196 (see Figs. 21 and 35), and a spring 197 is applied to said wheel 196 (see Fig. 20) in a manner corresponding to the application of spring 194 to the wheel 193 already described, so that said spring 197 tends to rotate said wheel 196 in counter-clockwise di rection, as viewed in Figs. 21 and 35, and thereby tends to maintain said pin 272 in engagement with said pin 271.

A pin 273 is carried by the wheel 196, and a pin 200 carried by the wheel 193 is disposed in the path of said pin 273 so that, upon predetermined rotation of said 'wheel 196 against the tension of a spring 197, said pin 273 will be brought into engagement with-said pin 200; whereupon, further rotation of the wheel 196 will cause corresponding rotation of the wheel 193, for a purpose to be hereinafter more fully explained.

An arm 274 rotates with the sleeve 74 and said arm carries, near the free end thereof, a. pin 275 (see Figs. 20, 21 and 35) in such relation to the teeth of the wheels 193 and 196 that, during each revolution of said sleeve 74, said pin will engage the teeth of said wheels and cause rotation thereof in clockwise direction against the tension of the springs 194 and 197 applied thereto.

A retaining pawl is provided for cooperation with the teeth of the wheel 193, the free end of said pawlbeing urged toward the path of said teeth by the spring 194, (see Figs. 21 and 35) and a retaining pawl 198 is arranged for corresponding cooperation with the teeth of the wheel 196, and is drawn toward said teeth by the'spring 197.

The pins 240 and 241, carried by the retaining pawls 195 and 198, respectively, project into the path of the arm 237 of the member 234, in such relation thereto that when said member is in