US2192352A - Receiving perforator - Google Patents

Description

' March 5, 1940. E. E. KLEINSCHMIDT ,3

RECEIVING PERFORATOR Original F 'il ed May 7, 19:57 2 Sheets-Sheet 1 llll lli mm W , IWII Patented Mar. 5, 1940 UNITED STATES 2,192,352 RECEIVING PERFOBATOR Edward E. Kleinschmidt, Highland Park, 111.

Application May "I, 1937, Serial No. 141,368

' Renewed August 10, 1939 20 Claims.

This invention relates to telegraph receiving perforators and in particular, to the type in which a group of perforations representing the signals for telegraphing a letter is perforated cross-wise in a tape.

Rerforators' now in use, as well as those proposed in the past, are complicated and costly in that all are provided with means to store the received selections which then transfer these se- 0 lections to a perforator or recording mechanism where separate mechanisms are provided to complete the perforating or recording operation.

In the present invention the devices for stor ing and transferring the selections, as well as the additional mechanism for perforating or other- -wise recording the selections, areentirely eliminated. This simplification greatly reduces the number of parts required and makes possible the construction of a perforator at a much smaller cost. The cost of upkeep is also greatly reduced, and due to the direct action and to the reduced number of adjustments required, the perforator of the present invention will operate more reliably than those previously proposed.

An object of the invention is to provide a simplified mechanism in which the usual means for storing the selections and for operating the selected punches in a group are eliminated.

A further object is to provide a mechanism in which a set of cams operate a set of punch levers in succession and a receiving magnet determines the punching operation of the punch lever so that a perforation is made in the tape for a signal impulse when it is received on the receiving magnet.

A further object is to provide an automatic feed-out device for the perforated tape which is started in operation when a message is combracket 3. It is rotated by gear 4. through friction coupling 5. Pinion 6 which drives gear 4 is connected to a constant speed motor not shown. As shown in Figures 1, 2 and 3, shaft 2 has mounted thereon a set of code punch cams I, 8, 9, HI and H, a feed punch cam l2, and a feed cam l3. An adjustable stop plate I4 is mounted on 5 the cam assembly. A set of five code punch levers numbered I5, l6, l1, l8 and I9 which cooperate respectively with cams 1, 8, 9, l0 and H are mounted on stud 20 and are normally held against the lower part of stud 20 and against stud 2| by springs 22. The bearing aperture in code punch levers l5 to I9 is elongated so that the lower portion can move away from stud 20 for a purpose to be later explained. A set of code punches numbered 23, 24, 25, 26 and 21 are operated by code punch levers l5 to IS; the code punches when operated pass through paper tape 28 and die plate 29. Each of the code punches is provided with a spring 30 to withdraw it from die plate 29 after the punching operation. All of the code punches 23 to 21 are located in a row at right angle to paper tape 28.

Feed punch 3| is provided and has a spring 32 for retracting it from die plate 29 after the punchin operation; feed punch 3| is operated by feed punch lever 33 pivoted on stud 68 which cooperates with feed punch cam l2. A feed wheel 34 is mounted on shaft 35 which has attached to it feed ratchet 36 and is operatedby feed pawl 3'], feed pawl lever 38 also pivoted on stud 58, and feed cam l3. A detent 39 is pressed against feed ratchet 36 by spring 40 and holds feed ratchet 36 in the fed position. Feed wheel 34 is located at a point approximately midway between code punches 23 to 21 and feed punch 3|. The feed holes are therefore perforated in advance of the code holes. By this structure it is possible to perforate the code holes very close to the edge of die plate 29 so that the last row can be advanced out of the die immediately after they are perforated;

The blank paper tape 28 to be perforated is fed to the leftin Figures 1 and 2 from a storage wheel not shown over roller 4| and from there under die plate 29 and over feed wheel 34.

A receiving magnet 42 is connected in the nor-v mally energized circuit of a transmitter by wires 82 according to the usual practice. Armature lever 43 is pivoted on stud 44 and held in the retracted position by spring 45. Armature lever 43 carries an armature 46 to cooperate with magnet 42, a fulcrum plate 41 having an upper beveled edge and a triangular stop projection 48. In the retracted position, armature lever 43 rests against stop screw 49. A start-stop lever 59, pm-

' lever'43 as shown in Figures 2 and 6 they will .from stop lug 56.

engage with fulcrum plate 41 and pivot thereon when one of the code punch cams I to I I operates the punch lever of which it forms a part. When the bearing ledge of a punch lever engages fulcrum plate 41 to pivot (Figure 6) thereon, the angular face engages the angular face of fulcrum 41 and also locks armature lever 43 in position until the punching operation is com-'- pleted. When the bearing ledge of a punch lever does not pivot on plate 4! but passes in front of it (Figure 5) as will occur when a code punch cam I to II operates a punch lever while armature lever 43 is in the retracted position, armaturelever '43 will be locked in that position by the vertical face of ledge 58 until the punch lever returns to its rest position. The purpose of this construction is to increase the operating margins of the perforator under adverse signalling conditions by providing in the selecting mechanism a definite point of determination for completing a selecting operation after it has been initiated by the selecting magnet.

' Perforating operation relation with the speed of a transmitter. Under these conditions shaft 2- and the cams mounted thereon are held stationary by stop lug 52 engaging with stop lug 58. v

I will describe the operation of the perforator when it is receiving the letter A which consists of the following impulses: one no current start impulse, two current impulses, three no current impulses, and the normal current stop condition. Upon the reception of the no current start impulse, armature lever 43 is released and stop projection 5| drops off stop projection 48 under the action of spring 55, disengaging stop lug 52 Shaft. 2 thereupon revolves. The first pulse for the letter A will attract armature lever 43 placing fulcrum plate 41 under bearing ledge 58 of code punch levers I5 to I9. As shaft 2 revolves, code punch cams I will engage with code punch lever I5, (Figs. 5 and 6) pressing same downward causing its bearing ledge 58.

to engage with fulcrum plate 41. Code punch lever I5 now pivots on fulcrum plate 4! and forces code punch 23 through paper tape 28..

The second pulse for the letter A also holds armature lever 43 attracted until code'punch cam 8"has engaged code punch lever I6 to force code punch 24 through the paper tape 28 in the same manner as just described.

The third pulse for the letter A being no current, releases armature lever 43 moving fulcrum plate 4! out of. the path of bearing ledges 58 (Fig. 5) so that when code punch earn 9 engages with code punch lever II, its bearing ledge 58 does not fulcrum on plate 4! and code punch 25 is not operated. Code punch lever II now fulcrums on code punch 25 at the end opposite to that engaged by code punch cam 9. The springs 22 which have less tension than the springs 38 will be extended and the punches will not be moved. The fourth and fifth impulses for the letter A are also a no current condition, armature lever 43 therefore remains retracted and neither of the 'code punches 26 and '21 are operated. The then following normal stop pulsewill attract armature lever 43 and cam lug 5! will engage cam face 53 and move start-stop lever 50 to replace projection 5| on top of stop projection 48. This action will momentarily Withdraw armature lever 43 slightly from its attracted position. While shaft 2 is rotating and while code punch levers I5 to I9 are being operated, feed punch cam I2 engages proje'ction58 forming part of feed punch lever 33 and operates that lever to force feed punch 3| through the paper tape 28. After the code punches have been operated, feed cam I3 engages with projection 60 forming part of feed pawl lever- 38, operating it to move feed tions.

Automatic feed-out device It is found desirable in various types of transmitting systems to automatically feed out the tape after the message has been completely perforated therein. To accomplish this the following devices are provided:

As shown in Figure l a universal bar 6| is pivoted on stud 20 and has a projection 62 which engages projection 63 forming part of latch lever 64. 'At every revolution of shaft 2 a cam 66 operates lever 65-to set in on latch lever 64' thereby closing the contacts III. Feed pawl lever 38 has a stud 61 that engages with contact springs I8 to close them momentarily whenever feed cam I3 operates feed pawl lever 38.

Referring to Figure 4, the. contact springs I0 and I9 are connected in series and are placed in a circuit with stepping magnet II and battery 88. Armature lever I2 which cooperates with magnet II carries a spacing pawl 13 that operates ratchet wheel 14. Detent I5 is provided to holdratchet wheel I4 in itsvarious set positions. To the ratchet is attached projection I6 which in its normal position engages with contact spring r 11 to hold the same out of contact with contact spring I8. Contacts I1 and I8 are in.a circuit bridging perforator receiving magnet 42.

Automatic feed-out operation In'the arrangement set forth it is contemplated that a blank combination, that is: a combination of. signals which perforate no holes in the paper tape 28 shall be transmitted at the end of every message. As previously mentioned, contact cam 66 operates lever 65 to latch it on latch lever 64 closingeontacts III. This happens at the beginning of every operating cycle as shown by the timing chart, Figure 7. If thereafter a blank combination of signals is received on magnet 42, none of the code punch levers I5 to I9 will be.

16 from contact spring 11 permittingit to con- 7 tact with spring I8 and close a circuit around the perforator receiving magnet 42. After a message has been received by the perforator it is expected that there will be a short interval before the following message is started. During this interval the normal stop current is on the transmission line.

When receiving magnet 42 is shunted by contact springs TI and 18 it becomes deenergized releasing armature lever 43 and permitting shaft 2 to rotate in the manner previously described.

Under this condition armature lever 43 is not attracted and fulcrum plate 41 remains out of the path of bearing ledges 58, none of the code punch levers l5 to l9 are operated, contact operating lever 65 remains latched on latch lever 64 and for every revolution of shaft 2 contact spring 19 will close momentarily, causing stepping magnet II to step ratchet wheel 14 one tooth for each revolution of shaft 2. This continues until projection 16 again engages with contact spring 11 to break its connection with contact spring 18, thereupon receiving magnet 42 is again energized, armature lever 43 attracted and when cam lug 51 engages with cam face 53, start-stop lever is reset and stop lug 56 will engage with stop lug 52 and remain there until another message is transmitted into the perforator.

When a combination of signals other than a blank is received on magnet 42 at least one of the code punch levers l5 to la is operated and universal bar 6| will be operated to operate the latch lever 64 and release contact lever 65'permitting contact 10 to open. When thereafter the feed pawl lever 38 operates to close contact spring 19 no circuit will be established through the stepping magnet l l The automatic feed-out device will therefore remain inoperative whenever a combination of signals other than blank is received on magnet 42.

While the invention herein described is shown in connection with the operation of a receiving perforator to operate in the circuit of transmitter sending five unit permutation code and start-stop signals, it is to be understood that its application is not limited thereto but has a wide field in various forms of telegraph systems using different signalling codes.

The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the.

scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

What is claimed and desired to be secured by United States Letters Patent is:

1. A telegraphic receiving perforator comprising a group of punches, a group of punch levers, one for eachunit in a code, a group of cams for operating the punch levers in succession one at a time, and a receiving magnet for selectively controlling the operation of the punch levers on the punches.

2. A telegraphic receiving perforator comprising a group of punches, a group of punch lever's, one for each unit in a code, a group of cams for operating the punch levers in succession one at a time, and magnet operated means associated with the punch levers to cause the latter to operate a punch, or to prevent the operation of a punch, in accordance with the signals received on said magnet.

3. A telegraphic receiving perforator comprising a group of punches and mechanism to operate said punches to perforate a record tape in code groups in accordance with received code signals, and means to automatically advance the tape through the perforator a predetermined number of code groups when the first group of code signals of predetermined combination is received.

4. A telegraphic receiving perforator comprising a group of punches, a group of operating punch levers, one for each unit in a code, a group of cams for operating the punch levers in succession one at a time, said levers under normal or inactive operation pivoting on the punches and under active operation pivoting at a point between the punches and the cams onan abutment which is movable in or out of the pivoting point of the punch lever to thereby selectively control the operation of the punch levers on the punches.

5. A telegraphic receiving perforator comprising a group of code punches, means to operate said punches to perforate a record tape, and an electro magnet to operate a selecting. mechanism to selectively control the operation of the punches on the record tape, means operated by direct operation of the selecting mechanism to make the electro magnet inactive for a predetermined number of punching operations.

6. A telegraphic receiving perforator comprising a group of code punches, a set of punch levers to operate said punches to perforate a record tape, and an electro magnet to operate selecting mechanism to selectively control the operation of the punches on the record tape, means operated by the punching mechanism to short circuit the electro magnet for a predetermined number of punching operations when a group of signals of predetermined combination are received on the said magnet.

7. A telegraphic receiving perforator comprising a receiving magnet, an armature cooperating with said magnet, a group of punch levers, one for each unit in a code and arranged to cooperate with said armature, a group of code punches, a series of cams, one for each punch lever and arranged to operate directly the levers in succession, said cams operating in timed relation to the signals received on the magnet and the co-operating faces of thearmature and the punch levers 50 located that when a punch lever is operated by its cam in one position of the armature, it engages the latter to pivot thereon and operate a punch, and in the other position of the armature it does not engage therewith and does not operate a punch.

8. A telegraphic receiving perforator comprising a group of punches and a group of punch levers, a set of cams rotated in timed relation with the received signals to directly and selectively operate the punch levers and the punches,

I one position of the armature lever and thereby operate a punch and not engage with the pivoting face in the other position of the armature lever.

10. A telegraphic receiving perforator comprising a group of punches, a group of punch operating levers each individual to a punch, cam means to operate the punch operating levers in succession, and magnetically controlled means to control the operation of the punch levers on the punches.

11. A telegraphic receiving perforator comprising a group of punches, a group of punch operating levers, and cam means to operate the punch operating levers, magnetic means to directly control the selective operation of the punch operating levers on the punches, a contact device under the control of the selective operation of the punches, and means operated by said contact device to, control the selective operation of the punches.

12. A telegraphic receiving perforator comprising a group of punches, a group of punch operating levers, a set of cams rotated in timed relationwith received signals to always operate thepunch'operating levers in succession, a fulcrum movable into two positions, said punchoperating levers when operated by the cams engaging with ,the fulcrumto operate the punches and to lock the fulcrum against movement when it is in one of its positions and to engage with the fulcrum to lock itagainst movement but not operate the punches when the fulcrum is in its other or second position.

13. A telegraphic receiving perforator com-' prising a group of punches that are operated in succession one at a time by a group of cams under the selective control of a receiving magnet.

14. A telegraphic receiving perforator comprising a group of punches that are operated in succession one at a time by a group of cams under the selective control of a; receiving magnet, said selective control comprising an armature for said magnet, a set of operating members that are always operated in succession by the cams, said armature engaging with the operating members in two positions to thereby selectively operate the punches to lock the armature against movement regardless of any change in the magnetic character of the magnet. Y

15. A telegraphic receiving periorator comprising a group of punches, operating means for said punches, signal responsive means controlling said operating means, and interlocking means for said operating and signal responsive means to increase the operating margins under adverse signalling conditions.

16. A telegraphic receiving perforator comprising a group of punches, operating means individual to each of said punches, signal responsive means controlling said operating means, and interlocking means for said operating and signal responsive means to increase the'operating margins under adverse signalling conditions.

17. A telegraphic receiving perforator comprising a group of punches, operating means individual to each of said punches, signal responsive means successively controlling said operating -means, and interlocking means for said operating and signal responsive means to increase the operating margins under adverse signalling conditions.

18. A telegraph receiver operated by equal length groups of two-element permutation code signals and comprising selecting means, recording means, spacing means and means under the direct and immediate control of a single group of code signals received by the selecting means to initiate the operation of only the spacing means for a predetermined number of spaces.

19. A telegraph perforator operated by equal length groups of two-element'code signals and comprising selecting means, code hole perforating means, feed hole perforating and spacing means, and means to operate the feed hole and spacing v means apredetermined number of times including selective means that are operable by a predetermined group of code signals to initiate the operation of said feed hole and spacingmeans.

20. In a receiving perforator a group of punches, a group of cams to always operate a group of punch operating levers one at a time and in timed relation with received signals, and

a receiving magnet to control the selective operation of the punch operating levers on the punches. EDWARD E. KLEINSCHIVIIDT.

Images