US2121184A - Telemetric broadcasting and recording apparatus - Google Patents

Description

June 21, 1938. J. P. BUCKLEY TELEMETRIC BROADCASTING AND RECORDING APPARATUS Filed May 1, 1934 5 Sheets-Sheet l sw'oawf or E332. mm 0? m i R a 0 8 June 21, 1938. J. P. BUCKLEY TELEMETRIC BROADCASTING AND RECORDING APPARATUS Filed May 1, 1934 5 Sheets-Sheet 2 June 21 1938.

J. P. BUCKLEY 2,121,184

TELEMETRIC BROADCASTING AND RECORDING APPARATUS 26K 4 23 KC-INSULATION Filed May 1, 1934 5 Sheets-Sheet 3 N SU -QTKON 55 INSULATION FIG. 5.

FIG. 7.

aazmgw June 21, 1938. J. P. BUCKLEY TELEMETRIC BROADCASTING AND RECORDING APPARATUS Filed May 1, 1954 5 Sheets-Sheet 4 mom NON

June 21, 1938. J. P. BUCKLEY TELEMETRIC BROADCASTING AND RECORDING APPARATUS Filed May 1, 1934 5 Sheets-Sheet 5 Svvuzwlor Patented June 21, 1938 UNITED STATES PATENT OFFICE TELEMETRIC BROADCASTING AND BE- CORDING APPARATUS 15 Claims.

This invention relates, in general, to an apparatus having means for automatically ascertaining the changes in a registering device, such as a thermometer or the like, and for signaling the 5 resultant findings over a conductor or by radio broadcast.

Another object of the invention is the provision of an apparatus to alternately detect such finding in a group of registering devices and while so 10 detecting the condition of each device to automatically record such conditions on a tape asa permanent record thereof or for the purpose of broadcasting the information collectively, at a later time.

' Still another object of the invention is the provision of an-apparatus which will be especially applicable for isolated spots for reporting meteorological and other conditions. As a specific example I have shown a thermometer and a barom- 2 eter but it is to be understood that these are merely examples and not a limitation of types of instruments which may be used. The many novel features embraced in this invention are far-reaching in their scope and are 25 applicable in many embodiments other than that which will be described, and I therefore do not wish to be limited except as indicated by the appended claims.

Figure 1 is a top view of the apparatus.

Fig. 2 is a modification. of the code wheel.

Fig. 3 is a front elevation view of a part of the apparatus, showing the application of a single roller and row of contacts.

, Fig. 4 is a detail view of the multiple contact plate, rack bar and coordinating parts and cams.

Fig. 5 is a diagrammatic view showing the application of the electric circuits, switch controls, connections to the recording device and radio 4 transmission key controlling the radio transmitting set. I

Fig. 6 is a detail view .of the upper end of the rack bar, showing the contact roller and multiple contact plate. v

Fig. 7 is a front view of the same, showing the application of tworollers and two rows of conacts.

Fig. '8 is a modification of Fig.' 5, showing how the same results may be obtained by employing 50 a photo-cell for indirectly energizing and deenergizing the several electromagnets. Fig. 9 is an enlarged view thermometer.

Fig. 10'is a top view of the thermometer and 53 housings.

or the photocell and Fig. 11 is a partial side view of the paper tape perforating means.

Fig. 12 shows a modification of the circuit make and break member, how it may apply in monitoring a swinging pointer meter.

Fig. 13 is a circuit diagram for the same.

Referring now in detail to the drawings:

The numeral 1 designates the bed plate supporting the standards 2, in which shaft 3 is loosely journaled. Securely fastened on the shaft is gear 4 meshing with the worm 5, of motor 6.

Adjacent to the worm on the shaft is the code wheel I, peripherally provided with dots and dashes 8, and is made free to revolve on shaft 3, through its loosely mounted elongated hub 9, carrying the gear 10, fixed thereto, the hub having one or more pin holes ll in its face to engage the pins i2 01' slidable clutch member 13, provided exteriorly with a keyway H, on shaft 3.

outwardly disposed from gear l0 and meshing therewith for controlling-its upward movement in the guide I5, is the rack-bar I6, the rear side of which has ratchet teeth I'I, engaged by the spring pressed pawl 18, for the purpose-of retaining the bar in its attained height when the power 1 is released.

The two sides [9 of the bar are recessed to slidably fit into the guide l5, which is securely attached to the base.

The top of the rack-bar, Figs. 4 and 7, shown in i this case and pivotally attached by screws 2|, has an extending arm 22 in the former and in the latter the two arms 22 and 23; the ends are designed to carry the two rollers 24 and 25. The, cross arm 26, fixed to the bar, is threaded to engage the adjustable screws 21, the outer ends of which screws bear upon the leaf spring 28, for resiliently pressing the rollers against the terminals 28 and 2 of insulation plate 30. The bottom of the bar has also the insulationppiece 31.

The clutch member I: is normally in' the position shown in Figs. 1 and 3 in engagement with the hub 32 of the loosely mounted cams 33 and 34, which it is adapted to drive by means of pin 31. The loosely mounted cams 33 and 34 are' held against lateral movement on shaft '3 by suitv able means 35, Fig. 3, and the hub 86 of the pinion 58. f

The rod 89 is slidably mounted'in bearing 38 and carries; roller 40 which cooperates with the cam 34 (see Figs. 1 and 4). The rockable member ll, loosely mounted on the vertical shaft 42, v has two projecting arms 43 and 44. The arms have slots 45 and 46, of such length, as to provide freedom of motion for the rods 39 and 41, when pivotally tied by bolts 48 and 49.

The forked head 59 of rod 41 is pivoted to the rod 5|, carrying the contact roller 52, and rock-; ably mounted in bearing 53. The spring 94 normally holds the roller from contacting with the code wheel as the roller 49 rests on the flattened portion of the cam 94 when the latter is in normal position. The forward throw of the contact roller across the face of the code wheel I, which is stationary at this time is brought about when the cam presents its non-flattened face to the roller 49, at which time the spring is under tension so that it will return contact roller 52 to its non-contacting position upon the return of cam 84 to its normal position.

The cam 93, controls the release of the pawl I8 from the rack bar, through the angle rod 55, Journaled in bearing 56, and having a projection 51 cooperating with said part. At the instant of release, the bar, through its own weight, falls downward to normal position. As the movement of the rack bar and code wheel are coincident, both members'return to normal at the same time. This release occurs at the instant when the key has reached its farthest travel beyond the code wheel to the left, when the code wheel will swing freely around, and come to rest as the contact roller commences to traverse backwardly over the portion of the face of the code wheel not provided with code forming projections.

The hub 92 of the cams 33 and 84, extends to the right of the cams and supports the pinion 58. Meshing therewith is gear 59, carrying the drum switch 99, in which metallic plates GI and 62 and 2 are embedded-the whole being supported on shaft 93, supported as by hearing 94.

Electrically contacting with the metallic plates 9|, 92, and 2, are the brushes 65, 96 and 2I9, which are held fast on their insulation support 61.

Projecting outwardly from the bearing 64 and fixed on shaft 98 is the pinion I9 which meshes with the large gear II provided on the end of the drum switch I2, carrying the metallic plates I3, I4, and I5. The brushes I9, I1, and I8 contact therewith and are also secured to the insulation block I9. The metallic drums 89 and 89' are provided with the insulation blocks 8| and H1 and cooperate with brushes 89" and 2I6. The shaft 82, of the drum is journaled in bearing 83, and is provided with the set collar 84 and the cam means which cooperates with arm 44 to form a stop means for the roller key 52.

In addition to the means already described the apparatus mounted on base I includes a recorder of the type in which a tape is perforated at intervals and additional contacting means for cooperation therewith to control a delayed transmission of the instrument readings. This means is connected to the main driven shaft 3 by means of an irreversibledrive so that it is driven in one direction only. A more detailed description of this means is now given.

Shaft 99 is mounted in spaced bearings 92 and I94 which are fixed to the base I, a gear is loosely mounted on said shaft and engages with pinion I9 to be driven thereby. A ratchet wheel 88 has its hub pinned to shaft 99 by pin 9|. A pawl 91 is mounted on the side of gear 99 and is pressed into engagement with the teeth of ratchet wheel 98 by spring 89. Thus the shaft 99 is driven only when pinion I9 is driving the rack I6 upward.

A clutch member 91 issplined to shaft 99 by spline 98. This member 91 is shifted by the usual forked lever means operated by an electromagnet I51 and spring I59 (see Fig. 5) which operation will be later described. The electromagnet I51, forkediever I58 and spring I59, schematically shown in Fig. 5, are located below the cylinder 99 when the device is viewed in plan and therefore are not shown in Fig. 1.

A sprocket wheel 93 having a hub 94 is loosely mounted on shaft 99 between the gear 89 and clutch member 91 and held laterally by suitable means such as a set screw or pin not shown. The hub 94 is provided with holes 95 for cooperation with the pins 96 on clutch member 91 when said clutch member is in its left hand position as viewed in Fig. 1. A drum 99 is also loosely mounted on shaft 99 between the clutch member 91 and bearing I94. The end I93 of drum 99 is provided with holes to cooperate with pins on clutch member 91 in a similar manner to the cooperation of holes 95 and pins 96. Drum 99 is proyided with a series of pins I99 for cooperation with perforations I9I along the edges of paper tape I92. The member 99 is suitably restrained from axial movement along shaft 99.

A shaft I95 mounted on base I parallel to shaft 99 by bearings I99 and I99" carries a drum I95 similar to drum 99 and having pins I9I like pins I99. This drum is fixed to shaft I99 by suitable means and is driven by means of sprocket wheel I I9 mounted on the end of shaft I99. A chain I I I connects the sprocket wheels 93 and H9.

Reference is made to Fig. 11 as well as Fig. 1 for the following description:

' The drum I95 when rotated feeds the paper tape I92 from the roll I99 across the die I29 of a punching means from which it may fall in a loop I98. A punch III slidably mounted in guide H8 is normally biased to inoperative position by spring means H9. The armature II5 of electromagnet II 4 normally biased to inoperative position by spring means II5 cooperates with punch III upon energization of said magnet II4 to punch a hole in tape I 92. The hole I2I in die I29 is positioned to cooperate with punch Ill. The energization of magnet II4'will be later described in connection with the circuit diagrams of Figs. 5, 8, and 13.

Fig. 2 shows how the code wheel I, when modifled, may, in coordination with other parts, such as a perforating die, eifect a stamping of a whole letter or number in one movement.

Any ordinary "step by step movement, not shown, may be employed to move the paper along for other stampings.

The non-magnetic bars I22 and I23 aligned with guide rods I24, and the iron plungers I25, freely journaled, constitute the stamping die. The electromagnet I28 with an extended core I2'I, serves to attract the iron plungers when energized. Such successive energization of the magnet as might be caused by any kind of rotary switch, affords means for the plungers to faithfully reproduce successively any one of the letters or numbers carried on the face of the code wheel, when presented.

The bottom portion I23, forming the movable head of the die has the dependent rod I29 journaled in bearing I29, and armature I39, in this way, the solenoid I3I, when energized, forces the head, beneath the paper, upwardly to engage the plungers, when the perforation of the paper is effected.

Fig. 3 is an elevation'view of a part of the apparatus, omitting the perforator and the electromagnets operating the same. The relay magnets I32 are shown beneath the base, with armatures I33 pivoted as at point I34 whose cooperation in the system will be later described. The projecting end carries electrical contact I35 oppositely opposed to'electrical contact I36 insulated from the base by insulation I31 and kept open when the rack bar i6 seats upon the armature or when magnets I32 are energized and closed during the upward movement of the bar by the spring I38, provided said magnet I32 is deenergized.

The means for electromagnetically operating the clutch member I3, is also shown wherein the armature I39 is held backwardly by the spring I40, anchored to post MI. The armature is pivoted as at I42, while the upper end of the arms. ture links with rod I43, thence to clutch rod I44, which is also pivoted as at base I45. The upper end of the rod is of the usual design for engaging a slidable clutch; forked ends with adjustable screws.

Fig. 5 is a circuit arrangement showing how one or more recording devices, such as the thermometer a and barometer b may be monitored and the readings broadcasted. The clock switch I46, and the circuit controlling the motor 6, is represented by the conductors I41, I48. and source I49. The rotatable metallic portion 80 of the switch 12 shunts the clock switch throu h conductors I50 and I5I. The insulation insert BI on the rotatable metallic portion of the switch 12 serves to break the motor current after the shaft 62. or switch has made one cycle. after which time the motor must again be energized by the clock switch or by some similar method.

Describing the operation of the apparatus and referring to Figs. 1 and 5, the clock switch I46 may close at predetermined periods and when so closed the motor 6, which serves to drive the shaft 3, and incidentally shafts 63 and 82, becomes energized. In order to short-circuit the clock switch I46 and toestablish a predetermined time limit to the operation a switching means comprising a metallic portion 80 of switch 12 with an insulation insert 8| and brushes 80 is connected across said switch I46 in the following manner: lead I5I connects one brush 80 to negative of battery I49 and lead I50 connects lead I41 to the other brush 80. When the system is In normal condition insulation 8| is under brushes 80 maintaining an open circuit at this point.- Upon rotation of shaft 82 when motor 8 'is started the metallic portion of switch 12 moves under the brushes 80, short circuiting the clock switch I46 and maintaining the motor circuit closed for one revolution of shaft 82. The adjacent metallic drum switch 80', comprising brushes 2I6 and insulation insert 2I1, is of like construction and by cooperating with the leads 2I5. serves to condition the transmitting set I81 having the antenna I88 and the ground for the key roller 52, as will be hereinafter described.

Next in order. and referring to the drum switches 60 and 12, is the closing of the shunt circuit which is composed of the smallmetallic plates 2I4, leads 2I3 to plate 29.- This arrangement or parts serves to shunt the main clutch circuit controlled by the electromagnet I60 as the plate 13 of drum switch 12 moves under the brushes 16. At this instant before the armature. carrying the spring I 10, is attracted, the electromagnet H4 is momentarily energized to perforate the paper strip I02 to represent the starting point of the upward travel of the bar. During the time the rack bar is pushed upward the pinion I also engages the loosely mounted spur gear 86, carrying the pawl 81, loosely pivoted on the side of the gear as at 89. The pawl engages with the ratchet 66 fixed on the shaft 90, which turns in the one direction only and is held fast on the shaft by the pin, 9|. The loosely mounted sprocket wheel 93, due to the engagement therewith at this time of clutch member 91, by clock switch being closed thus energizing magnet I51, the sprocket chain III is drawn, which also surrounds the sprocket wheel I I0 fixed on the shaft I06, and supporting the drum I to revolve in order to step up the paper strip I02 with each movement of the rack bar, in short, the rack bar, code wheel, and strip of paper are synchronously arranged to keep in step.

The main clutch I3, having taken hold the pinion I0, uplifts the rack bar I6 supporting the roller 24, and turns the code wheel 1 around correspondingly to a degree with respect to the alignment of the contact roller 52 across its face until the roller 24 rises above the level line between the point of contact and the top of the mercury column I63 where it loses the current and causes the electromagnet I60 to become deenergized, allowing the spring .I10 to again contact with the lead "I, leading to the electromagnet I I4,'which, on becoming energized, for the second time perforates the paper strip, this time, indicating the height of travel of the bar. The circuit of the punching unit may be traced through the spring I10 on the armature of the electromagnet I60, thence through the.conductor I1I, electromagnet II 4, conductor I12, brushes 16, conductors I14 and I48, to the positive side of the source I49. From the negative side of the source, conductors IN and I68, conductor I69 and thence back to the spring I10, as shown.

In this manner the distance between perforation in the paper strip is made to represent the distance traveled by the rack bar and code wheel. Therefore, each successive action of the apparatus is recorded permanently, and, later, through other movements, may be made to automatically repeat such action. As each action causes an timing of contacts 6|, 62 and 2I4 through their spacing and the ratios of gears 58 and 59 is such that the cams 33 and 34 may make a complete revolution, thus causing the contact roller to pass over the code wheel and return to normal and subsequently tripping the pawl I8 which will permit the rack bar I6 and the code wheel to return to zero, before the main clutch circuit is closed again. To this end the cam 34 moves against the roller 40, which, through the rod 39. angle piece 4I and rod 41, pushes the key roller 52 across the projections 8 of the code wheel.

.While traversing over the projections 6. electrical contacts between the roller and projections take place. and signals may be broadcasted. The end 51 of the rod 55 is curved outwardly, as shown in Fig. 4, to push the pawl I8 from the toothed portion I1 of the rack bar. and permit the rack bar and the code wheel to return to zero, the weight of the bar being sumclent to with battery I40 and thus contacts 2| I' are energized through the barometer and leads 2I2' (see Figs. 5 and 7. The same action, throughout, as recited, takes place in monitoring and broadcasting the height of the column of mercury in the barometer, the smaller plates 2 being common to both instruments in conditioning the circuit for the eiectromagnet I00. The apparatus is conditioned to monitor and broadcast the findings of each instrument in turn as the plates i and 02 are successively engaged, such action has already been described which brings us to the point where the whole may be again broadcasted collectively through the recorder during the second phase of the cycle of the drum 00 when the monitoring is silent the plates not being shown. In this case the cam 05 is omitted from the apparatus. The length of time of the monitoring and broadcasting is determined by the clock switches I40 and IE3, which may be made to shunt the insulation 0|, on metallic drum 12, otherwise as shown, the action of the whole will stop as the brushes 00" contact with the insulation insert 8i, thus completing period of broadcast, which may be renewed by the clock switching means at certain periods. Where the instruments are monitored only for one-half phase of the drum 00 and the cam 05 having its eccentric extension arranged to interrupt the path of the roller 52 may be timed to stay the roller 52 to the left side, during this time, until the beginning of the second half-phase of the cycle when the cam may release the roller and the clock switch I53 may close to energize .the auxiliary circuit controlling the electromagnet I51 of the recorder. The circuit for the same consists of the clock switch I53, conductor I 55, electromagnet I51, conductor I54 to the negative side of the source I50, and from the positive side of the source to the pivoted end of the switch I53. With the disengagement of the clutch 01 of the recorder from the sprocket wheel 03, the drum 08 turns in engagement with the clutch 01 and advances the paper strip I02 up from the loop I00; beneath the contact roller I I2, and thereafter, electrically contacts with the drum 00 as the holes are encountered to complete the circuit through the system. The position of the drums 00 and 12 now renders the roller 24 electrically inoperative, and transfers its control oi the electromagnet I00 to the smaller roller II 2 o! the recorder, which functions, electrically speaking, in the same manner as the roller 24the distances between the punched holes of the strip of paper moving between the roller H2 and the drumJ0 should, in every case, equal the distance of the travel of the rack bar, and hence, a reproduction of the monitoring of the instrument will be broadcasted. The plates 14 and 15 now engaged, forms a part of the circuit through'the electromagnets I32 and IE0. Tracing the circuit for the electromagnet I32, which is operably associated with the perforations in the paper strip, there is shown plate 14, one brush 11, conductor I10, roller II2, under which the paper strip is drawn, the drum 00, electromagnet I32, conductors I to conductors I00, IN to the negative side of the source I40, from the positive side of the source through conductor I 40, thence over conductor I14 which has a short lead to the other brush 11 and to plate 14. This circuit, through the electromagnet I32, is controlled by the paper strip I02, and performs the same service with respect to the operation of the clutch magnet I00 as the columnof mercury in the instrument during the time of monitoring. The distance, therefore, between the perforation in the paper strip is analogous to the length of upward travel, in each case, by the roller 24 of the rack bar. To accomplish this end after the roller 24 picks up the current from plate 29 to energize the electromagnet I00, as in Fig. 5, I have provided the armature I33, to which is connected the conductor I04 leading up from one of the brushes 10 which contacts the plate 15.

It will be noted that the armature is held downward by the weight of the rack bar which is provided with the insulation 3i in its normal position against the bias of armature spring I30. When the rack bar is raised contacts I30, I31 and lead I8I are allowed to complete the circuit of clutch operating magnet I00. Thus while the paper strip separates drum 09 and contact roller H2, the clutch magnet I00 remains energized in a manner similar to when energized through the mercury column in monitoring the upward travel of the roller 24, when the paper strip moves forward and presents another perforation beneath the roller II2, the electromagnet I32 is energized and draws the armature downward to break the circuit throughthe electromagnet I60 for another length between the perforations in the paper strip, and so on, until the last perforation arrives at a predetermined position, when the clock switches I53 and I 40 will open simultaneously.

Fig. 8 shows the clock switch I53, together with the motor circuits and transmitting set conditions, as similarly shown in Fig. 5.

The drums, 80 and 12, may have many plates according to the gear ratio, in this respect, however, I have shown but four metallic plates, 0i and 02, surrounding the one-half phase of the drum: the other side of the drum is left blank except for the smaller plates 2I4 which are equally spaced around the drum. The plates 13, 14, and 15, on drum 12 are suitably arranged to cooperate with the plates SI, 02 and 2 of drum 00, and the clock switches I40 and I53.

The cam 05 is for the purpose of making captive the contact roller 52, and may come on at any prearranged time of the system, as for instance,

' when it is desired to monitor and record the data during the daytime only, without the broadcast feature, and, later, as during the early part of the night when the static is low, and may be more convenient for the operator, remotely stationed,

to listen in for the collected data, at which time the cam 05 goes "01! as the clock switches I53 and I40 go on, to finish the second half-phase of the cycle, during which time the broadcast of the findings of the day may occur. The cam may be shaped to clear the arm of angle 4i at any time for monitoring, broadcasting and recording with each action of the apparatus, or may be omitted, as the case might be.

Fig. 7 showshow a multiple roller 24 and 25, electrically connected to each other and to the rack bar support I0, may engage a multiple row of metallic buttons 2 and 2i I on an insulation panel 30 and electrically connected separately with the plates 0| and 02, as might be inserted in the circuit, Fig. 5. Any number of rollers, on one rack bar, and as many rows of buttons, properly insulated on a panel, may identify a number of instruments successively as the plates GI, 02 et seq. are successively contacted by their respective brushes.

In Fig. 8 the main clutch circuit for energizing the electromagnet 00 is slightly modified to conform to the application of a photocell, which functions in lieu of the roller 24. The cell I94 is housed in the case I93, on top of the rackbar in alignment with the lamp I9I, also housed oppositely in the case.

The whole forms a part of the movement of the rackbar. As the rackbar rises the light rays scan one side of the thermometer, the mercury of which forms a shutter for the cell opposite. n reaching the top of the mercury,'the light rays pass through the stem uninterruptedly to the cell, which on being sensitized through the leads I96 and I91, instantly energizes the relay I96 throughleads I96 and I91, whose armature I99 becomes attracted, and, similarly, as the roller 24 rises above the mercury, the relay breaks the current through the electromagnet I60. The circuit may be traced as follows: the two conductors I64 and I66, leading from source I49, including contacts 65 and the plate 6|. From the negative side of the source I49 the conductors I6I and I68 connect with electromagnet I60 and from the magnet through conductor I62, pawl I8, rackbar I6, and therefrom through lead 20I back to the armature I99. With the exception of omitting plates 2I4, the switch 60 is of the same construction and has the same parts as shown in Fig. 5. The circuit for the electromagnet II4 for recording the perforations in the paper strip is also the same as used in Fig. 5. The circuit used in broadcasting the data, however, on account of the relay application, is different to the extent that electromagnet I32 is omitted, the member I82 taking the place of armature I33, the contacts, etc., being the same as in Fig. 5. From the member I82, when free, the circuit continues through conductor 200 to relay I98, and thence through conductor 200' to roller I I2, and through the perforation in the paper to drum 99, thence through conductor I19 through brushes 11, to plate 14, across the plate 14 to the short lead connecting the conductor I 14, and through I48 to the positive side of source I49. From negative side of source through .conductors I6I, I68, to conductor I16, back to armature I82.

The lamp circuit, which is also controlled by the plate 13, is composed of conductors I6I and I95, leading from negative side of source I49 to lamp I9I, conductor I94 to conductor I12, brushes 16, plate 13, and conductors I14, I48 to the positive side of source I49. The clock switch I53, and the electromagnet I51, operate in the same way, as in Fig. 5.

Still another modification of the invention for energizing and deenerglzinrthe main clutch electromagnet I60 as in the case of the roller 24, and the photo-cell I94, is shown in Figs. 12 and 13, wherein the swinging pointer type meter 206 is monitored.

The gear I0 is shown in mesh with the teeth of the curved portion of-the rackbar I6a which is shaped to swing around freely on a shaft, as at point 209, centrally but independently of the shaft of the meter. The top of the bar is provided with the resilient blade 2I0, with its topmost portion bent inwardly so as when the pinion I0 turns the rackbar backward the bent portion of the blade will swing forward and electrically engage the pointer 201. As the movement of the blade is synchronized with the movement of the code wheel, the latter will take aposition corresponding to that of the meter pointer 201.

At the instant of contact the relay I98 becomes energized and attracts the armature I99, thereby breaking the current through the electromagnet I60, in the same manner as shown in Fig. 8.

The circuit of the relay may be traced from the blade 2I0, through the conductor I95, relay I98, conductors I95, I6I, to negative side of the source and from the positive side of the source I66 to conductor I48, thence to conductor I14, across plate 13, to conductor I12, thence to conductor I94, and then to pointer 201.

The main clutchcircuit, operating the electromagnet I60 is followed from the armature I99, through conductor I64, across plate 6I through conductor I66 to the positive side of source I49, and from the negative side of the source to conductors I6I, I68, electromagnet I60, thence through conductor I62 to pawl I8, pinion I0, to conductor 20I and back to the armature I99.

The broadcasting circuit may be traced from plate 14 through brushes 11 to conductor I14, thence to conductor I48 to positive side of the source I49 and from the negative side of the source to conductors I6I and I95, to relay I98, thence through conductor 200 to member I82, conductor 200' to roller II2, drum 99, conductor I19 and through other brush 11 to plate 14.

Fig. 2 shows a modified form of the code wheel 1, which is constructed of non-magnetic material and has an open side to permit the portion I21 of the core of electromagnet I26 to extend inwardly and over the projections 8. Properly spaced beneath the projections are the iron plungers I25 which are loosely supported in the non-magnetic bar I22, held fast to the table top by pins I24. The head I23, attached to the armature I30, forming a part of the non-magnetic rod I28, has a series of holes in alignment with the iron plungers I25. The plungers normally escape the projections 8, but when the magnet I26 is energized are drawn towards the projections and spaces between them as shown. Such plungers as are free to become magnetically attracted rise up into the spaces between the projections and when so attracted, do not register when the head I23 is forced upward to take the impression of the plungers as they might array beneath the projections of the code wheel. The paper has a step-by-step motion at right angles to the code wheel, in order to take other impressions of the code wheel. Any suitable rotary switch on the shaft 3, also not shown, may energize the solenoid before each stepping time of the paper.

In Fig. 9, I have shown how the case I9I may be divided into two integral parts, and how the hoto-cell may be kept in alignment with the lamp case by the looped arm 202, attachedto the photocell case fixed to the head of the rackbar I6. The loop is for the purpose of allowing the thermometer to be displaced by another instrument of similar design when such instruments are mounted on a carriage and passed on successively from the loop after having been monitored.

The thermometer is shown coated with black enamel 203 with two slits along its length 204 and 205 to permitthe light rays to pass to the photocell. A top view of the thermometer and cases is shown in Fig. 10.

What is claimed is:

1. In a device for broadcasting and recording gage readings, a signalling device, a code element for controlling said signalling device, a sensing device, the movement of which from a reference point is determined by the gage reading, a recording tape, electro-mechanical means positively driving the code means, the sensing means and recording tape in synchronism from the reference point; perforating means associated with said recording tape, said electro-mechanical means including a first switch drum and a second switch drum, an electro-magnetically operated clutch, spring biased to normally drive said switch drums, an electric motor and a periodic circuit closer; a first electric circuitcontrolled by said periodic. circuit closer for initially energizing said motor, a second electric circuit ineluding certain contacts of said first drum switch for shunting said periodic circuit closer, a third circuit including the sensing means and certain contacts of the second drum switch, for shifting said clutch to disengage the drum switch drive and drive the code means, the sensing means and the recording tape; a fourth electric circuit in-- cluding contacts controlled by movement of said clutch for operating the aforesaid perforating means while the sensing means is still at its reference and when the sensing means determines the gage reading whereby the gage reading is recorded.

2. The device of claim 1 in combination with a rebroadcasting device including a tape-receiving drum for the recording tape and means associated therewith for controlling the code element through the aforesaid electro-mechanical means in accordance with the record previously made thereon.

3. In combination with a code wheel, a motordriven shaft on which the wheel is freely mounted, cams and gears mounted freely on. said shaft, certain of said gears fixed to rotate with said wheel and another of said gears fixed to rotate with said earns, a sensing device and a recording device geared to said first named gear, a first drum switch geared to said second named gear and a second drum switch associated in fixed angular relation with said first drum switch, a clutch associated with said motor driven shaft and biased to drive said cams from said shaft, said clutch having a contact means associated therewith, electric means including one of said drum switches and said sensing device for controlling said clutch, second electric circuit means including the other drum switch and said clutch contact means for controlling said recording device, loeking means for holding said sensing means and code wheel in a given position, key means for cooperating with said code wheel, one of the aforesaid cams being constructed and arranged to operate said key means while the code wheel is held and the other of said cams being constructed and arranged to release said locking means after operation of the key means.

4. In a device of the character described, a gage having a pointer movable from a reference point, a coding device angularly movable from a reference point, means associated with the gage also angularly movable from the gage reference, means associated with the first named means and the coding device to transmit proportional movement from the first named means to the code device.

5. In a device for broadcasting recorded data, a variably positioned element, means for making a record of the position of said element, a code carrying element having a movement in one direction and being provided with code producing elements, said code producing elements being arranged in code groups substantially transverse to the said direction of movement of the code carrying element, keying means including an element movable over each code group, means for positioning said carrying element in accordance with said record.

6. In apparatus of the character described, a pointer, means to move the pointer in response to change in meteorological conditions, sensing means movable from one reference point to engage the pointer, code selecting means set by the amount of movement necessary for the sensing means to engage the pointer, signal emitting means, means controlled by the code selecting means to control the signal emitting means.

7. In combination with the system of claim 6, a recording means to record proportionately the amount of movement of the sensing means simultaneously with the movement of the sensing means, means to subsequently reset said code selecting means by said recording means to a position corresponding to the code selected at the time the recording means recorded, means controlled by the code selecting means to again control the signal emitting means.

8. In apparatus of the character described, an independently movable variable element, sensing means to periodically move to sense the variable element from one reference point, code selecting means operated to select a code in accordance with each sensing of the sensing means.

9. In combination with the apparatus of claim 8 a recording means simultaneously operated with the sensing means, means including the recording means to subsequently reoperate the code selecting means to select the same code as that code which was selected when the recording means was operated.

10. In apparatus of the character described, an independently movable element, a code selecting means, circuit means to control the code selecting means including a light responsive means, means to move the light responsive means to sense the limit of the movable element from one reference point.

11. In combination with system of claim 10 a recording means to proportionately record the total movement of the sensing means simul-' taneously with the movement of the light responsive means, means including the recording means to subsequently reset the code selecting means to a position corresponding to the code previously selected at the time therecording means recorded.

12. In apparatus of the character described, an instrument for measuring variable conditions having a movable pointer, means to move the pointer in response to change in conditions being measured, sensing means associated with said instrument and movable from one reference point to engage the pointer, code selecting means set by the amount of movement necessary for the sensing means to engage the pointer, signal emitting means, means controlled by the code selecting means to control the signal emitting means.

13. In combination with the system of claim 12, a recording means to record proportionately the amount of movement of the sensing means simultaneously with the movement of the sensing means, means to subsequently reset the code selecting means by said recording means to a position corresponding to the code selected at the time the recording means recorded, means controlled by the code selecting means to again control the signal emitting means.

14. In an apparatus for transmitting signals corresponding to a gage reading, a rotatable main shaft, electric motor'operated means for rotating said shaft, a cylindrical signaling member loosely mounted upon said shaft and having a signaling member and the cam means for selective driving of each of these means, said clutch means being normally biased to drive said cam means, electromagnetic means for shifting the clutch means to drive said signaling member, a gage having an indicating element, movable in a defined path, an exploring means movable along said gage path to a position corresponding to that of the indicating element and geared to said signaling member for movement therewith, a latch for holding the exploring means in said position and meanscooperating with the cam means for releasing said latch, a keying device comprising a contact means mounted for movement across said signaling member and cooperating with the coding contacts and having actuating means controlled by said cam means to effect said movement after the exploring means has reached the latched position, arecorder drum and transmitter control drum, irreversible coupling means for driving said drums individually from the signal member, only when said member is driven by the main clutch means, including an auxiliary clutch means normally biased to drive the recorder drum and,

shiftabie by a time controlled means to drive the other drum, a record ribbon, means on said drums for cooperating with said ribbon, whereby it is driven by said recorder drum toward the other drum to form a loop there-between and subsequently driven by said other drum to take up the loop, a marker means adjacent the recorder drum and means for causing said marker to mark said ribbon when the exploring means reaches its latched position, contact means cooperating with the transmitter control drum and the record ribbon for controlling the key n device, a signal transmitting apparatus including the keying device as its control means and drum switch means driven from the main shaft and connected to the various parts of the system for determining the time oi operation of each of said parts.

15. In an apparatus of the character described,

means for periodically determining meteorologwhereby the determination of said meteorological conditions between selected operations of the last mentioned means will be broadcast.

JOHN P. BUCKLEY'.

Images