US1164626A - Impulse-transmitting mechanism. - Google Patents

Description

A. H. ADAMS.

IMPULSE TRANSMITTING MECHANISM.

APPLICATION FILED NOV. 30. 1914.

Patented Dec. 21, 1915.

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A H. ADAMS.

IMPULSE TRANSMITTING MECHANISM. APPLICATION FIL'ED NOV. 30, 1914f 1,16%,Q6, Patented Dec. 21, 1915.

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ARTHUR H. ADAMS, OF SPARKILL, NEW YORK, ASSIGNOR TO WESTERN ELECTRIC COMPANY, OF NEW YORK, N. Y., A CORPORATION OF ILLINOIS.

Specification of Letters Patent.

Patented Dec. 21,1915.

Application filed November 30, 1914. Serial No. 874,683. 1

To all whom it may concern:

Be it known that I. ARTHUR H. ADAMS, a

citizen of the United States, residing at Spar-kill, 'in the county of Rockland and State of New York, have invented certain new and useful Improvements in Impulse- Transmitting Mechanisms, of which the fol; lowing is a full, clear, concise, and exact description.

This invention relates to impulse transmitting mechanism, for use particularly in substations for automatic exchanges, and has for its object to provide a new and improved device of this character, of few and simple parts. in which the possibilities of confusing the receiving mechanism by a forced operation of the transmitting device are eliminated by the provision of means for locking the setting means against operation during the operation of sending out impulses.

In a device embodying the features of this invention thereis a setting device operable in forward and backward directions, an interrupter also operable in forward and backward directions but effective only in its backward movement to send out impulses, and connections between said setting device and said interrupter for causing the opera tion of said interrupter only after said setting device has returned to normal position, and for locking said setting device in normal position until said interrupter has completed its operation.

In the drawings illustrating this inven tion-Figure 1 is a perspective view of the impulse transmittingdevice with a portion of the mechanism cut away; Fig. 2 is a sectional view taken on the line 2-2 of Fig. 3; Fig. 8 is a sectional view taken on the line 3-3 of Fig. 2; Fig. l is a sectional view taken on the line 4@l of F 3; and Figs. 5 and 6 are views of details of. the impulse sending mechanism.

The impulse transmitter comprises a dial plate 7 mounted in front of which by means of a shaft 8, is a finger hole plate 9. The dial plate 7 forms the front wall of a c vlindrical inclosing case 10 for'housing the mechanism used in transmitting impulses. The shaft 8 has its inner end recessed to accommodate a second shaft 11. thelatter of which is mounted axially of the casing 10 and functions as a supporting means for rotatably mounting the various elements comprising the impulse sending mechanism.

the reduced portion of pro ect1ng a short distance on both sides The finger plate 9, is separated from the dial plate 7 by means of a bearing 12, which functions to provide a space between the dial and finger plate. Within the casing. 10 and adjacent the dial plate 7 is a coil spring 13 which is attached to the shaft 8 and adapted to supply the motive power for operating the impulse sending mechanism when it is wound up by rotating the finger plate 9 in a clockwise direction, and afterward released by the operator. Extending from the shaft 8 is a lever arm 14', the free end of which has a reduced portion forming an extension finger. Immediately back of the lever arm 14 and thereof, is mounted a pin 15 which serves as a pivot for a spring pressed pawl 16 and as a stop for locking the fingerplate 9. Next to the lever arm 1% and carried by a bearing 17 journaled upon the shaft 11 is a ratchet wheel 18. The pawl 16 is positioned to be in operative relation with the ratchet wheel 18, so that when the pawl is moved in a counter-clockwise direction, the ratchet wheel is advanced thereby. Adjacent the ratchet wheel 18 and attached to the bearing 17 is a second coil spring 19. It may be mentioned here that the strength of the spring 19 is considerably less than that of spring 13, which permits the former spring to wind the latter spring in a manner hereinafter explained. The outer or free end of the springs 13 and19 are fastened to any suitable support or retaining member 20 which is secured to the casing 10. Mounted upon a bearing 21 which may be integral with or connected tothe bearing 17 is an impulse wheel 22 having a corresponding number of teeth as there are digits or designation characters made upon the dial plate .7. Pivotally mounted to the rear wall 23 of the inclosing case 10 and in operative relation with the impulse wheel 22 and contact spring members 21, is a bell crank lever 25. The long'arm of the lever 25 carries a. roller which engages the teeth of the impulse wheel 22 when it is rotated. A spring 31 attached to a projection on the bell crank lever 25 and having its opposite end anchored by a post 32, functions as a means for normally keeping the contact lever 25 out of engagement with contact spring members.

Mounted intermediate the coil spring 19 20. of hiagnng and "the'impulse wheel 22 is a large gear wheel 33 which is adapted to mesh with a pinion 34. The pinion 34 is secured to a shaft 35 carried by a bracket 36 that is 5.suitably fastened by means of screws 37 to therear wall 23 of the case 10. Mountd upon the shaft 35 is a wormgear 39 :Yadapted to mesh 'with a .worm 40 formed lupon a shaft 38 carr'y'inga governor mechaminism. The governor mechanism (illustrated best by' Fig. 4) comprises the main drive shaft 38 adjustably mounted by means of screws 42, 42 which are carried by supports" ,43. Upon one end of the shaft 38 a governor wheel 44 having assonor springs 45are confined in a member 46 having two bearing f" different diameters. The object the member 46 this form, is to prov' e1 different speeds for the governor mechanism so that the impulse wheel 22 may be rotated faster in one instance than is expedient in another, as Will be fully 'set' 5 forth hereinafter.

Attached supporting bracket 47 iwhich is secured to the rear wall 23 is a 'latch member 48, which is secured to a shaft 49 carried by said bracket 47. An arm 50 B0 of the latch member 48 engages a pin 51 carried by the ratchet wheel 18, under certain conditlons. Another arm 52 of said membr 48 engages the pin under other conditions. An extension member 53 fastened to the opposite endof the shaft 49, under the tension of a spring 54, tends to rotate the I shaft 49 in an upward direction, thereby' keeping the .arm 50' of the latch member 48 normally engagedwith the pin 51, and when the ratchet wheel 18 is rotated, said extension comes to rest against the stop post 32. To limit the movement of the ratchet wheel 18 when rotating, in a clockwise direction, an extension member 55 carried by said wheel. 18, is arranged to strike against a normal post member 56. The normal post 56 also functions to arrest the movement of I the lever arm 14 in a counter-clockwise difreed from engagement with the ratchet wheel v18, which fact permits said ratchet wheel to be rotated independent of'said pawl under certain conditions.

' The operation of the mechanism compris- 6 ing the impulse transmitter is as follows:

11 it a pair of governor springs 45.

The operator places his finger in the hole in front of the digit forming a part of the number he Wishes to call, and turns the finger hole plate 7 in a clockwise direction until his finger strikes the finger stop 26. This operation causes all the elements carried by the shaft 8 to be rotated in a clockwise direction, thus effecting the winding of the coil spring 13, and the rotation of the lever arm 14 and pawl 16 carried thereby. When the operator removes his finger, the energy now stored up in the coil spring 13, rotates the shaft 8 is a counter-clockwise direction The pawl 16 under the tension of its spring engages one of the teeth of the ratchet wheel 18, thereby causing all of the mechanism mounted upon the shafts 17 and 21 to be movedin a counter-clockwise direction under the influence of the coil spring 13. This movement continues until the pin 27 engages with the normal post 56, whlch arrests the extension arm 14 and at the same time causes the pawl 16 to become disengaged from the ratchet wheel 18.

It will be noted that when the ratchet wheel 18 was rotated as described above, the arm of theratchet lever 48 was freed from engagement with the pin 51, and under the tension of the spring 54 the lever 48 was given a slight rotary movement until the stop arm 53 engaged the stop pin 32. This operation permitted the hook formed upon the extremity of the lever 52, to engage with the pin 15 when the lever arm 14 came to rest. By virtue of this arrangement it is now impossible to rotate the finger plate 9 until the ratchet wheel 18 has been returned to normal position, thereby effecting the disengagement of the hook on the levelarm 48 with the pin 15. This feature prevents the sending of impulses until all of the apparatus has returned to normal position, thus eliminating the possibility of confusion of impulses which might otherwise result.

Upon the disengagement of the pawl 16 from the ratchet wheel 18, the energy now stored in the coil spring-19, rotates the elements carried bv the shafts 17 and 21 in a clockwise direction. The rotation of the impulse wheel 22: in this direction causes the under the roller carried by said arm, the

lever 25 is moved in a downward direction, thereby causing the contact springs 24 to be reopened. As each of the various teeth pass on they disengage the roller of the lever arm permitting the bell crank lever 25 to return to normal position, thus effecting the closure of the contact springs 24. This intermittent closing and opening of the contact springs 24 produce impulses which maybe trans: mitted over a circuit desired to'be effected. It will be apparent that when memes at the impulse wheel 22 was rotated in a counter clockwise direction, the bell crank lever 25? was actuated, but in a reverse manner which prevented the opening of contact 24. It is, therefore, only possible to transmit impulses when the impulse wheel 22 is rotated in a given directions Returning to the operation of the governing mechanism, it will be seen that said mechanism was first operated when the-shaft 21 was rotated in a counter clockwise direction. In this operation the governor springs 45 carried on the governor shaft 38, due to the direqtion of the rotation and a corresponding longitudinal movement of the shaft 38, engaged the greater diameter of the cupped member 46. Because of the reduced friction between the governor springs and the bearing surface now engaged thereby, the shaft 38 was permitted to rotate at a higher speed than when the shaft is rotat-- ing in the opposite direction. WVhen the impulse wheel moves in a clockwise direction, the direction of rotation and longitudinal movement of the governor shaft 38 is reversed, and the governor springs 45 then engage the smaller bearing surface of the cupped member 46 which considerably reduces the movement of the impulse wheel 22 and the mechanism rotated in synchronism therewith. It will thus be seen that when the impulse wheel 22 is rotated in a counter clockwise direction, it may be,

rotated at a greater speed than when turning in a clockwise direction. This feature provides a means for rapidly setting the impulse sending mechanism, and a slowerand more uniform speed for transmitting the impulscs.

From the above description it will be apparent that the features of this invention are to provide an impulse transmitting device which embodies means whereby it is possible to control the speed at which impulses may be transmitted, and also prevent the transmission of succeeding impulses until the preceding impulses have been sent, and the transmitting mechanism returned tonormal position.

What is claimed is: a

1. In an impulse transmitting device, an interrupter movable in forward and backward directions, contact springs operated by said interrupter in one direction of move 'ment to send out current impulses, an actuating means mdyable in forward and backward directions, connecting means between said interrupter and said actuating means for caus ng the operation of said interrupter after sald actuating means has returned to normal position, and means for locking said actuating means against movement during the movement of said interrupter to send out impulses. M

2. In an impulse transmitting device, an interrupter movable in forward and backward directions, contact springs operated by said interrupter in one direction of movement to send out current impulses, setting mechanism movable in forward and backward directions, connecting means between said setting means and said interrupter for moving said interrupter in the same relative direction .to the movement of said setting means, means for moving said inter-.,

. shaft, a second shaft rotatable independently of said first-mentioned shaft, a" disk carried -thereby having notches in its periphery adapted to be engaged by said pawl in a given movement of said finger dial to rotate said seeond-mentioned shaft, means for disengaging said pawl from said disk when said finger dial has reached normal position, means for rotating said secohd-mentioned shaft in a direction opposite to that in which it was rotatdby the movementof the finger dial, circuit-interrupting springs operated in the last movement of said shaft to send out current impulses. a'pivotally supported latch adapted to engage said pawl supporting means to prevent the rotation of said finger dial during the sending out of impulses, and means carried by said notched disk for disengaging the said latch from said pawl supporting means at the end of the .impulse sending operation of said interrupter.

In witness whereof, I hereunto subscrlbe my name this 28th day of November, D.

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