US1719489A - Telegraph printer - Google Patents
Telegraph printer Download PDFInfo
- Publication number
- US1719489A US1719489A US271439A US27143928A US1719489A US 1719489 A US1719489 A US 1719489A US 271439 A US271439 A US 271439A US 27143928 A US27143928 A US 27143928A US 1719489 A US1719489 A US 1719489A
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- US
- United States
- Prior art keywords
- printer
- bar
- stunt
- telegraph
- telegraph printer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L17/00—Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. Baudot code
- H04L17/16—Apparatus or circuits at the receiving end
- H04L17/22—Apparatus or circuits at the receiving end using mechanical translation and type-bar printing
Definitions
- AMOS H. SHANGLE OF ROSELLE, NEW JERSEY, ASSIGNOR TO BELL TELEPHONE LAB-. ORATORIES, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.
- the receiving printer is provided with a hand operated locking device which may be moved 1nto such a position that it engages a member projecting from the space stunt bar and thereby prevents a space signal from unshifting the printer carriage.
- the horizontal selecting bars 20 to 24 are so arranged that the special code or stunt bar 48 is permitted to move towardthe selecting bars under the action of its spring 57.
- the pull bar 168 connected at one end to the link member 129 and at the other to rocker arm 157 is moved downwardly to rotate the bell crank lever 158 and unshift the carriage, when the auxiliary striker bar 181 engages the heel member 58 at the rear of link member 129.
- the shaft 2 is rotatably mounted in a bracket member 9 which is secured to the frame of the printer and has a square section 8 which coacts with a spring member 4 to hold the device in whichever position it is set.
- the clamp 5 is securely attached to the stunt bar 48 and has a right angled extension piece 6 with an inclined surface 7 As the handle is moved in a counter clockwise direction into the position indicated, the stud 8 in the shaft 2 slides along this inclined surface, to its final position thereby holding the stunt bar away from the select ing bars and preventing the heel member 58 from moving backward intothe path of the auxiliary striker bar when the selecting bars are set in accordance with a space signal.
- WVhat is claimed is:
- a receiving telegraph printer printing mechanism, means responsive to received signals for selectively operating said mechanism, a stunt bar, means for moving said stunt bar to condition said mechanism, and manually operable means for locking said bar in a predetermined position.
- a receiving telegraph printer printing mechanism, means responsive to received signals for selectively operating said mechanism, a stunt bar, means for moving said mined signal for unshifting said carriage, and means under the control of the attendant 10 of said printer for rendering said signal ineffective to unshift said carriage.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
Description
July 2,1929. A. H. SHANGLE TELEGRAPH PRINTER Filed April 20, v 1928 //vv/v r01? Auas hf SHANGLE A ram/[y Patented July 2, 1929.
UNITED STATES PATENT OFFICE.
AMOS H. SHANGLE, OF ROSELLE, NEW JERSEY, ASSIGNOR TO BELL TELEPHONE LAB-. ORATORIES, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.
TELEGRAPH PRINTER.
Application filed April 20,
transmission which consists of periodically plugging a receiving printer into each of the circuits which converge at a central office. In applying thismethod of monitoring it has been found that considerable confusion and delay results from the difierences in the manner in which various so-called stunts are performed in the various circuits. For instance, some of the send ng printers are arranged to work in conjunction with receivingprinters which return the carriage from the shift to the normal position upon the receipt of a space signal and others unshift only when that code combination corresponding to the letters key is received. It is desirable thereforethat a printer which is to be used in monitoring service be readily adaptable to either class of service. i
In accordance, therefore, with the general features of this invent-ion the receiving printer is provided with a hand operated locking device which may be moved 1nto such a position that it engages a member projecting from the space stunt bar and thereby prevents a space signal from unshifting the printer carriage.
The operation of this device may be readily understood from the following description and the accompanying drawing which shows how this invention may be applied to one type of telegraph printer.
A complete description of the operation of the printer used to illustrate this invention is given in U. S. Patent 1,623,809. For the sake of clearness the elements not directly related to the operation of the locking device have been omitted in the present drawing, but enough of the printer structure has been included to show clearly how the device operates without the necessity of referring to the prior art. The various printer elements shown have been designated as in the drawings of the patent cited above 1928. -Serial No. 271,439.
in order that their relative positions in the printer may be easily found.
Referring now to the drawing, when a combination of impulses representing the space signal is received, the horizontal selecting bars 20 to 24 are so arranged that the special code or stunt bar 48 is permitted to move towardthe selecting bars under the action of its spring 57. The pull bar 168 connected at one end to the link member 129 and at the other to rocker arm 157 is moved downwardly to rotate the bell crank lever 158 and unshift the carriage, when the auxiliary striker bar 181 engages the heel member 58 at the rear of link member 129. This together with the other features of printer operation is fully described in the reference.
lVhen it is desired to use the printer to monitor a circuit in which the receiving printers should not unshift when a space signal is received, the monitoring operator turns the handle 1 into the position in which it is shown. The shaft 2 is rotatably mounted in a bracket member 9 which is secured to the frame of the printer and has a square section 8 which coacts with a spring member 4 to hold the device in whichever position it is set. The clamp 5 is securely attached to the stunt bar 48 and has a right angled extension piece 6 with an inclined surface 7 As the handle is moved in a counter clockwise direction into the position indicated, the stud 8 in the shaft 2 slides along this inclined surface, to its final position thereby holding the stunt bar away from the select ing bars and preventing the heel member 58 from moving backward intothe path of the auxiliary striker bar when the selecting bars are set in accordance with a space signal.
WVhat is claimed is:
1. In a receiving telegraph printer, printing mechanism, means responsive to received signals for selectively operating said mechanism, a stunt bar, means for moving said stunt bar to condition said mechanism, and manually operable means for locking said bar in a predetermined position.
2. In a receiving telegraph printer, printing mechanism, means responsive to received signals for selectively operating said mechanism, a stunt bar, means for moving said mined signal for unshifting said carriage, and means under the control of the attendant 10 of said printer for rendering said signal ineffective to unshift said carriage. In Witness whereof, I hereunto subscribe my name this 19th day of April, 1928.
AMOS H. SHANGLE.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US271439A US1719489A (en) | 1928-04-20 | 1928-04-20 | Telegraph printer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US271439A US1719489A (en) | 1928-04-20 | 1928-04-20 | Telegraph printer |
Publications (1)
Publication Number | Publication Date |
---|---|
US1719489A true US1719489A (en) | 1929-07-02 |
Family
ID=23035573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US271439A Expired - Lifetime US1719489A (en) | 1928-04-20 | 1928-04-20 | Telegraph printer |
Country Status (1)
Country | Link |
---|---|
US (1) | US1719489A (en) |
-
1928
- 1928-04-20 US US271439A patent/US1719489A/en not_active Expired - Lifetime
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