US2361696A - Telegraph recorder control - Google Patents

Description

Oct. 31, 1944- Q w LUCEK 2,361,696

TELEGRAPH RECORDER CONTROL Filed NOV. 9, 1945 L E T TE RS I GENERA TOR i ,wcusr I 1 F511 I I i- J IIIIHI- POLAR/ZED FEED OUT KEY lNVENTOR C. WLUCEK Maud 1.44M.

ATTORNEY Patented Oct. 31, 1944 TELEGRAPH RECORDER CONTROL Charles W. Lucek, Port Chester, N. Y., assignor to Bell Telephone Laboratories, Incorporated, New

York, N. Y., a corpora tion of New York Application November 9, 1943, Serial No. 509,535

2 Claims.

This invention relates to telegraph systems and more particularly to arrangements for controlling reperforators or other receiving recorders.

It is frequently desirable to manually or otherwise cause a reperforator to advance the recording medium through the machine during idle periods to enable the end of the last received message to be advanced out of the machine so that the entire message may be readily removed or detached from the machine. Attempts have been made in the past to provide such an arrangement and at the same time provide means for insuring that received signals after the first or some succeeding one of them will be properly recorded.

As shown in the systems described in both an application of Bacon Serial No. 509,537, filed November 9, 1943, and an application of Watson Serial No. 509,540, filed November 9. 1943, a single retarded relay is employed to interrupt the manually controlled circuit arrangement for advancing the record medium through the receiver when signals are received and also to prevent the advancing of the record medium through the instrument by means other than signals when Tests have indicated that" signals are received. a suitable commercial relay cannot readily be de signed to function equally well under both sets of circumstances.

Accordingly it is an object of the present invention to overcome this difficulty by providing 1 two relays, one a fast relay for interrupting the connection upon the reception of the first re ceived signals, and a second slow or retarded relay to hold operated during the reception of signals for preventing the establishing of connections to advance the record medium through the mechanism by means other than received signals.

The foregoing objects and features as well as other objects and features of the present invention, the novel features of which are set forth in the claims appended hereto, may be more readily understood from the following description when read with reference to the attached drawing.

In the drawing ll represents a receiving instrument such as a reperforator or typing reperforator and may be of the type disclosed in patent application of Bacon et al., Serial No. 383,490, filed March 15, 1941, or any other suitable type. disclosed in said application is employed the socalled feed-out magnet need not be supplied since no use is made of it in the exemplary embodiment of the present invention described herein.

Line relay l0 follows signals received from line It should be noted that if the type L and repeats them in the customary manner to the selector magnet l2 of the recording instrument ll. As shown in the drawing, the circuit from the marking contacts of relay 10 extends through the break contacts of relay IE to the selector magnet l2. The selector magnet l2 therefore follows the received signals and causes the recording device H to record the signals in any suitable manner.

During the reception of signals the armature of line relay I0 is actuated between its M and S contacts in accordance with the signals. During the time the relay is in its spacing position, that is, during the time its armature is in contact with the S contact, a circuit is completed for the operation of a slow release relay [5. Relay [5 is a slow release relay of any suitable type which will maintain its armature actuated and thus the associated contacts open due to closures ,of the spacing contacts of relay it) during the reception of signals. Relay [5 is designed so that it will maintain its contacts open during the time signals of any character, other than a. marking or idle condition, are being received by relay lfl.

In order to permit an operator to advance the record medium through the receiving device I l during idle periods thereof a special key I! has been provided which when operated completes an obvious circuit for the operation of relay l3. The operation of relay [3, however, during the time relay I5 is operated, is ineffective to operate relay I6. Furthermore, with relay l3 operated a circuit will be completed for the operation of relay I4 upon the reception of the first spacing signal received over line L. Relay H in operating will complete a circuit for maintaining itself operated under control of relay l3, thatis, as long as key I! is maintained operated.

With either relay M or i5 operated, the circuit through the winding of relay I6 is inter rupted. Hence,.it is impossible to operate relay It at these times. Consequently, even the accidental operation of key I! during the.time signals are being received will not in any way interfere with the reception of the received signals on the signals transmitted to the selector device II from said source Will cause device I! to advance the record medium out of the machine so that the entire previous message may be removed from the machine without any mutilation thereof and Without removing the rest of the recording medium from the machine or from the paths which it follows through the machine. Upon the release of key 11, after sufiicient tape has been perforated or advanced through themechanism, a circuit is completed for maintaining the selector magnet 12 operated. This circuit extends from negative battery through the break contacts of key ll, both sets of operated contacts of relay Hi to positive battery through the winding of the selector magnet l2. This circuit causes the selector magnet to remain operated so the selector mechanism will come to rest. The release of key I! also interrupts the operating circuit of relay I3 and relay l3 releases and in turn interrupts a circuit of the slow release relay l6. Relay it, however, does not immediately release as will be described hereinafter. However, upon -the release of relay E6, the circuit from the letters generator l8 and the circuit through the break contacts of key ll are disconnected from the selector magnet I2. Hence, the selector magnet is again connected to the contacts of the repeating relay l and ready for reception of succeeding signals received from line L.

As set forth in the above-mentioned application of Watson, filed on even date herewith, relay IS in an exemplary embodiment of the invention is'designed to maintain its contact closed for an interval of time approximately equal to the time required for the reception of a single character. Hence, the selector magnet I2 is maintained operated during the reception of the entire'first character. pulses of the first character, other than the start pulse, are spacing they will not in any way cause the release of the selector mechanism of the recording instrument H. However, relay IE will generally be released when the start pulse of the second character is received by relay it. Consequently this pulse and the succeeding code combinations will be transmitted to the selector magnet l2 and recorded by the receiving device II.

If signals are received during the time key I? is operated the start pulse of the first signal Will cause the armature of relay IE) to move to its spacing position where a circuit is completed for the operation of relays I l and I5. As described above, relay i is a slow release relay and will operate with reasonable speed. However, in order to insure that only one character preceding the message will be required to properly condition the receivin equipment if it is in the process of advancing the record medium through it, it has been discovered that the operating time of the usual slow release relays is too long to permit satisfactory operation under these condi- Consequently if any of the tions. In order to overcome this difficulty the operation of the armatureof relay lil to its spacing condition during the time the record medium is being advanced through the receiving device II, a circuit is completed for the operation of relay [4 from negative battery through the ar mature and spacing contacts of relay ll], break contacts of the winding of relay M, to positive battery through the upper operated contacts of relay [3. Relay l4 may, therefore, be made a very fast operating relay. Relay I4 in operating completes a circuit for maintaining itself operated under control of relay [3 as described above. By making relay l4 fast in operating the circuit of slow release relay I6 is interrupted suificiently accurately after the reception of the first spac ing signal so that this relay can be released at the end of the first code combination with sufiicient accuracy to permit the recorder l l to accurately respond to the second received code combination.

As shown in the drawing, the contacts and windings of the various relays extend either to positive or negative battery. It' is to be understood that these positive and negative batteries may comprise a positive and negative terminal of a rectifier or a single battery. It Will be further appreciated bypersons skilled in the art that either of these two terminals may be grounded if it is so desired.

What is claimed is:

1. In combination, a telegraph reperforator for per crating tape in accordance with received telegraph signals, a magnet for controlling said reperforator, apparatus .for transmitting received signals to said magnet, a source of predetermined signals for causing said reperforator to advance said tape therethrough independently of received signals, manually controlled switching apparatus for connecting said source of signals to said magnet, a slow release relay operative incident ceived code combination to said magnet.

2. In combination, a telegraph reperforator for perforating tape in accordance with received telegraph signals, a magnet for controlling said reperforator, apparatus for transmitting received reception of signals for rendering said switching apparatus ineffective, a fast operating relay responsive to received signals for interrupting the connection between said source of signals and said magnet, and time delay equipment operated incident to the establishment of said connection for preventing the transmission of the first received code combination to said magnet.

CHARLES W. LUCEK.

Images