US3033926A - Orientation device - Google Patents

Description

May 8, 1962 T. 1. PRZYSIECKI ORIENTATION DEVICE Original Filed Dec. 20, 1945 liiliiiiiiliiiliiiiiiii LWA 1 Claim. (Cl. 17833) This invention relates to printing telegraph apparatus and more particularly to orientation means therefor.

This application is a division of application Serial No. 636,215, filed December 20, 1945.

The primary object of the invention is to provide means for adjusting the angular positionment of a receiving selector drum to coincide with the time of arrival of signal impulses.

Another object of the invention is to provide a means comprising cooperating cam slot and follower elements for orientating the selector cam drum to incoming code signals.

In the process of orientation, it is desired to position the selecting intervals of the receiving selector with respect to the incoming signal impulses so that the midpoints of the line signal impulses will be received during said intervals. To take an orientation range a test sentence is transmitted to the printer continually while the range is being taken. While this sentence is being received, the orientation scale is shifted (by loosening the the thumb nut) toward zero until errors begin to appear in the test sentence. The orientation scale is then moved back slowly until these errors disappear. This position indicates one limit of the orientation range and the position is noted on the scale. The same performance is repeated toward the opposite end of the scale to find the other limit. After the two limits (or extreme positions of perfect printing) have been found, the orientation scale should be set midway between these two points.

A feature according to the present invention resides in coordinating a contact control means with the orientation device to insure properly timed operation of associated apparatus.

A more comprehensive understanding of the invention may be had by reference to the following detailed description when considered in conjunction with the accompanying drawings, wherein,

FIG. 1 is a perspective view of the orientation device according to the present invention;

FIG. 2 is a top view of the orientation device;

FIGS. 3 and 4 are transverse sectional views showing different operative positions of the orientation device; and

FIG. 5 is a fragmental view showing essential elements of a selector mechanism with which the orientation device according to the present invention is operative.

As fully disclosed in the copending application Serial No. 636,215, of which this is a division, the main operating shaft 11 of the recorder is suitably journaled in brackets 12 mounted on the main frame thereof, and carries a selector cam sleeve 13. Power is imparted to shaft 11 by a motor (not shown) through a gear 20. Associated with the selector cam sleeve 13 is a plurality of selector levers 14, mounted pivotally on a rod. 15 suitably mounted in the main frame. Each lever 14is provided with a cam follower portion 16 which cooperates with a selector cam 17. Levers 14 are normally biased in a clockwise direction (FIG. 5) by individual springs 18 to urge the cam follower portions 16 against the peripheries of their associated cams 17. The free end of each lever 14 cooperates with a shoulder :19 at the up- States atent O ice per extremity of one of the code bars 21, of which there are a series corresponding in number to the number of levers 14. Code bars 21 are comparable to code bars 396 of U.S. Patent No. 2,339,313, which is incorporated herein by reference. Code bar 21,. like said code bars 396, control the selection of the type character elements to effect printing. Each lever 14 is provided with a projection 22 which fits slidably into the open-ended slot 23 of a lever 24 pivotally supported, as disclosed in the copending application Serial No. 636,125. Each lever 24 is provided with a vertical portion 25 which is adapted to cooperate with the selector armature 26 of a selector magnet 27 suitably carried on a bracket means 28.

' The selector magnet 27 is shown in FIG. 5 as energized in response to the normal marking condition of the signal line, thereby holding the armature '26 attracted against the pull of a spring 29. In this condition of operation with the parts as shown in FIG. 5, the lever 14 upon encountering a cam notch in cam 17 will be actuated clockwise by its spring 18 since the portion 25 of lever 24 is not blocked by the armature lever '26. However, if the armature 26 is in its released (or counterclockwise) position due to a spacing (or de-energized) condition in magnet 27, then the lever 14 upon encountering a cam notch in cam 17 will not be actuated clockwise by its spring 18 since the portion 25 of lever 24 will be blocked by the armature lever 26. The cards I17 are of similar contour but are displaced on the shaft 11 angularly so that the peripheral cam notches thereon are disposed in a helically arranged series whereby coaction with the cam followers 16 will occur in a sequential manner as the series of cams 1'7 rotate in synchronism with the speed of code impulsing.

The orientation device according to the present invention comprises a graduated'scale member 31 which is fixedly mounted on the frame of the apparatus and carries a clamping screw 32 which cooperates with an orientation plate 33 which, in turn, is rotatably mounted on the shaft 11. An index notch 34 is provided on the edge of plate 33 to cooperate with the indications on plate 31.

Having reference to FIGS. 1 and 2 an axially expansible or extensible sleeve 35 is mounted on shaft =11, and a spring 36 mounted thereon extends the sleeve 35 to impart pressure to the friction material 37 embracing the selector cam sleeve 35. Plate 33 has projecting therefrom a stud 38 on which is pivotally supported a lever 39 having a depending arm ll-which cooperates with a contact pair 42 which, in turn, controls a circuit for energizing a magnet (not shown). An arm '43 of lever 39 cooperates with a cam 44 which isprovided with a peripheral cam notch through the instrumentality of which lever 39 is oscillated periodically to cause a periodic closing of contact pair 42.

Also mounted on stud 38 is a bell crank lever 45, one arm 46 of which cooperates with a start-stop disc 47 integral with sleeve 48, the other arm 49 of which cooperates with an arcuate slot 51 in a release lever 52 pivotally mounted on a pivot shaft 53 suitably carried in the frame of the apparatus. Release lever 52 cooperates at its free end with the selector magnet armature lever 26 and is normally biased counterclockwise by a spring 54. When the selector magnet '27 is energized due to marking current on the'line, the end of armature 26 will function to bloc'kthe counterclockwise movement of release lever 52. However, in response to a spacing impulse (no current on the 1ine),the end of armature 26 will be swung free of lever 52 thus permitting lever 52 to respond to the pull of its spring 54 thereby bringing lever 52 into contact with a start-stop cam 55. At the same time, lever 45, through the articulation of its arm 49 with arcuate slot 51 of lever 52, will be actuated counterclockwise to disengage its arm 46 from Patented May 8, 1962' the start-stop disc 47, thereby initiating the rotation of sleeve 48;

Upon the rotation of sleeve 48, the cam 44 thereon will permit the periodic closure of contact ,42,,and cam 55 will cooperate with the cam follower portion 56 of arm 49 to return lever 52 into blocking relation with armature lever 26, and if lever 26 is actuated to its mark ing position, the lever 52 willremain in the'position shown in FIGS. 3 and 4. Also, upon the rotation of sleevej48, the selector cams \17, an armature extension Io'ck lever cam (not shown) and a function clutch trip cam (not shown) will be rotated therewith. The rotation of cams 17 efi'ect the selective operation of selector levers 14 and 24 in a manner disclosed in copending ap plication Serial No. 513,374 filed December 8,1943, which issued on January 11, 1949, as U. 5. Pat. No. 2,458,734, in the 'name of A. H. Reiber, deceased. Ihe

' armature extension lock lever cam controis the operation of a lock lever (not shown) in the manner disclosed in H. L. Krum Patent No. 1,783,382,; and the function clutch trip cam functions to control a clutch trip lever (not shown) to render a clutch (not shown) on shaft 11 operative, in the manner disclosed in W. l. Zenner Patent No, 2,339,313. V

Since the bell crank lever 45 is carried on the orientation plate 33, it is movable therewith solthatas' the" plate 33 is rotated, the pivot 38 for carr'ying'lever 45 will revolve about shaft 11 in a planetary manner, and since thedistance between pivot 38 and the apex of card 44 in the stop position as shown in FIG. 3 is invariable, the stop position of cam 44'may be varied by the rotation of plate 33 as shown in FIG. 4." 'Because of the fact Although a preferred embodiment of the invention has been shown in the drawings and described ill the foregoing specification, it wiilbe understood that the invention is not limited to this embodiment but is capable of modification and rearrangement without departing from the spirit of the invention.

Whatis claimed is: In a telegraph receiver, a selecting mechanism responsive to received code combinations of electrical impulses comprising a set 'of selectors, a frictionally driven rotatable cam member for governing said selectors, said member having a stop disc, signal responsive means hav- 7 ing an armature, a stop member having a stop portion and a cam follower portion, a rotatable orientation plate mounted concentrically with said cam member, said stop member pivota'lly mounted-on said plate and adapted through its stop portion to coact with said stop disc to stop said cam member in various angularly adjusted positions, a stationarily pivoted lever normally latched by said armature, spring means acting to rotate said lever when said lever is unlatched in response to a start signal,

and cam means operative during the rotation of said rotatable cam member to return said lever to said normal latched position against the action of said spring means, said lever having a cam slot c'ooperable with said follower portion so that said stop mcmber is constrained to move with said lever through the articulation of said follower portion with said cam slot, saidca'm slot conformed to cooperate with said follower portion in all that'the disengagement of bellvcrank lever 45 is con- I trolledby the release lever 52; in all positions of lever 45, the arcuate slot 51 is provided which "is of appro priate conformation to compensate for the movement of said l'ever'45'.

adjusted positions of said stop member, whereby orientation of said cam member with respect to saidselectors is efiected.

References Cited in the tile of this patent UNITED STATES PATENTS

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