US1461944A - Impulse sender - Google Patents

Description

July 17, 1923.

M. SETTER IMPULSE SENDER Filed April 8, 1918 WI/AVVEE /\7/CHE,4/ grr 6. Q3.

n frae/vm Patented July 1?, i923.

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ra'rrs PA NT orr MICHEAL SETTER, or CHICAGO, ILLINOIS, As sre voa To AUTOMATIC memo coir- PANY, or CHICAGO, ILLINOIS, A. conrone'r on or ILLINOIS.

IMPULSE snnnnn.

Applicationfiled April8, 1918. Serial ltd/227,402.

"" To all whomc'timag concern:

Be it known that I. MIGHEAL SETTER, a

a dial is used to open and close a line circuit in accordance with the digits of a called number.

I have chosen to illustrate n'iy invention in connection with a dial ofthe character shown and described in Automatic Telephony by Smith and Campbell published in 1914, although it may be understood that my invention may also be applied to any calling device of standard construction. i

The main object of invention is to provide improved mechanism for operating a calling device of this character, whichmechanism when applied to a calling device pro 0 vides for a greater efliciency of operation and a longer life for the device. It is well known that a device ofthis character when located at a subscribers station or at an operators position is subjected. to a very.

great amount of wear and tear so that it is very necessary that all partsbe as free from friction as possible. One of the elements ofthis type calling device has been the use of a spring as aratchet which spring rides 40 over the top of a set of ratchet teeth as the dial is rotated in one direction and then catches in the tooth of the ratchet to which it has advanced to bring the said ratchet wheel back with the finger lever or dial to deliver impulses. A great deal of trouble has been occasioned in the past from the use.

of this spring dog or ratchet as it was not well adapted to stand the strainwhich it must undergo and also was liable to snap in cold weather. An object of my inven tion, therefore, is to provide an improved ratchet to replace this spring or any other device and one which will stand a great deal 1 of wear and tear and in which the amountof t5 friction is reducedto a minimum,

Impulse Senders, of which ity "of ratchet teeth '7 on the 1 front surface In the drawings 1 have illustrated a calling device of the character described showing the relation of my ratchet device to such asender. Fig." 1 is afront view of the calling device. i i

"Fig. 2 is a side view of the same.

1' Fig. 3 is a rear view of the same. i v

FigsLd, 5 6 and 7 are detail views show-K ing elevationsof the various parts of the device. 1

I will now explain in detail theconstrue tionand operat-ionof the device illustrated.

Referring to Fig.1 I have illustrated the frontplate orfinger hole dial l pivoted at its central point ina base plate 2 (Figs. v52 :0 I

and 3) by mean'sof a. rod havinga coiled spring 3, oneend of which is firmly secured to the end of rod lby means of a slot therein and the other end of which. is fastened to a. lug 5 on the under side ofthe base-plate 2. This spring 3 acts to return the finger hole diall to its normal position after'havin g been wound up by the rotation of the dial manually in a clockwise direction. Loosely mounted upon the pivot rod 4: and rotatable I thereon is a combine'd gear and ratchet wheel 6"which is provided*withgear'teeth around its circinnferenceand with a'pl-uralthereof. 'llheseratchet teeth 7 are equal in number tothe number of holes in the finger .dial and are arranged to lie just underneath the rear-surface of said dial for co-operation therewith. In dials previously made a circular spring having a dog out therefrom was mounted on the rear face of the dial to co-operate with the teeth 7. "I have however provided a new dog and ratchet device. Through anopening in thedial lis placed a small metal dog8; which is'shownin detail in Figure 6, this dog is cut 'out so thatone edge will fall into one of the ratchetteeth 7 when the dial is normal. spring Sl -(Fig: 7 is provided having'a downwardly bent lip 10 which rides in the upper grooved faceof said dog 8and' maintains it"a't' all times with a slight tension tending to press against the teeth 7 f A fibre piece 11 is provided; (Fig. 5) which fits over the spring '9 butis cutaway to allow for vertical movement of'the lip 10; The manner in which the dog 8 and its co-operating partsisafdapted to fit into the ratchet teeth is very clearly shown in Fig. 4:, like parts being numbered ion a. worm wheel 14 which drives theiis u al" governor l and a cam wheel 16 having two, wings adapted when the shaft is rotated to,

with the gear teeth in the circumference of which is pivotefd],in tlie bracket l3 atone end and in a part of base plate 2 at'the other end. Mounted on this same shaft is open and close Contact of a pair of springs 17" and 18; which are usually used .tp send impulses, over the well knowntwo wires oi. a telephone system to control automatic switchesx-Aupair of springs 19 and 20 are also provided and are what is known as the shunt springs; that ie, 'tl18SB SpI1IlgS are allowed to 'c'loselby bushing 21 as soonpas the calling device leaves its normal position and are used to-shunt the talking equipment at a subscribers station to prevent the subscriber from bie'ing'annoyed by induct on;

@Now as the finger of a subscriber is 111- serted in onel'of the finger holes of the dial 1,'- said dial is: first rotatedin a. clockwise 25 direct-ion until} thefinger reaches the stop QQQ During this rotationthe gear wheel 6 willrema'inin its normal position and the ratchet or dog 8will simply ride up the inclinedfaceofieachltooth and drop into the next, :against only the tension of-the curved lip {10,of spring 9. When jt-hBfiIIgQF of the operator;isremovedjhowever the spring 3 into which tension was stored bythe forward. movement, causes the dial 1 to be returned to normals In this movement the dogfi willlnot ride over theteeth? as in the forwardmovement, but i will catch in the tooth :to which it was rotated-and cause the V gear 6 to ,rotateiwith the dial 1 back to -nor-,

malposition where it isstopped by a suitable s'top'; As the dog 8 rotates'the gear 6,

the pinion. 121WlllfllSb be rotated and the return .movement. of the entire apparatus will therefore be regulated and timed hythe retarding actionofv the, governor 15. The result OfgtlllS return of the device ,to normallisetheinterruption of the contact of the springs 17v and 18 a-number of times cor;

"* mp nding tothenumber of. the finger hole .dialvinto which-the s'ubscribers finger was inserted. ;It.,-wi1l,;be 'seen,- therefore, that haveprovldeda novel, and useful device for use .a ratchet which works up and down against the tension of spring 9 as the dial r0 ,55

tatesg-in one direction andwhich clamps itself' stationa-ry in the tooth of the ratchet towhich itsis, advancedvtAlso it will be seen" that there; lsjvery, little friction caused by the operationiofi,this dog and ratchet arone of its surfaces, a hand operated driving element; having an'opening therein, a pawl adapted to be inserted into. said opening and cooperating with, said driving element, to drive said element, and aleaf spring mount: ed adjacent said openingand having a] pro j'ection. which acts as asole support for-sald pawl and holds it in engagement with, the ratchet teeth of the driven element through said opening-Q, j a A 7 2. Ina'l'ratchet drivenmechanism, an el ement to be driven having ratchet, teeth on one ofitssu'rfaces, a hand operated driving element, an opening in said driving element, a. pawl 'a da otedlnto ,be inserted into said opening; a leaf spring mounted adjacent said openingand having a projection which holds said pawl in engagement with the ratchet teeth of the driven element through said opening, said spring so mounted that itmay be moved away from saidopenin gi to allow said pawl tohe removed therefrom. v v

3. Ina ratchet driven mechanism, a gear wheel 'adapted to d'rive the-mechanism, having crown ratchet,teeth on oneside thereof, a driving element mounted adjacent said gear wheel, a pawl removably mounted inan opening therein in such a manner that when the element is moved in one direction the pawl rides over the crown teeth and when moved in the other direction the pawl moves said gear wheelandaspring over the open ing. oppositethe ratchet teeth" which tends to keep the pawlin engagement with the ratchet teeth said springbeing' held against lateral, movement a groove in the pawl.

4L. Ina ratchet driven meolhanis'm a gear wheel adapted to drive the mechanism hav ing crown ratchet teeth on one side thereof, a driving element mounted adjacentl said gear wheeha pawl removably mounted in an opening therein in such a mann er that when the element is moved: in one direction the pawl rides o ver the crown teeth and when moved in the other direction the pawl engages said crown ;teeth',to;move said gear wheel, and a spring over thef opening opposite the; ratchet'teeth whiclr tendsflto eep, h "paw in e g em t th h ete t t t sa spri en e 1 hatkit m y bemoizedqto one side of said opening to allow the pawl to be removed, I 1 7 5,111 a ratchet driven mechanism a gear wheel adapted to drive the mechanism haw ing crown ratchet teeth on: one side thereof, a driving element mounted adjacent. said gear wheel, apawlremovahly mounted in an opening therein in such a manner that when the element is moved in one direction the pawl rides over the crown teeth and when moved in the other direction the pawl moves said gear wheel and a flat spring mounted over the opening opposite the ratchet teeth which tends to keep the pawl in engagement with the ratchet wheel, said spring mounted so that it may be moved to one side of said opening to allow the pawl to be removed. without changing the relative position of the opening with regard to the ratchet teeth.

6. In a ratchet driven mechanism, a gear wheel adapted to drive the mechanism hav ing crown ratchet teeth on one side thereof, a driving element mounted adjacent said gear wheel, a pawl removably mounted in an opening therein in such a manner that when the element is moved in one direction the pawl rides over the crown teeth, and when moved in the other direction the pawl moves said gear wheel, a spring over the opening opposite the ratchet teeth which tends to keep the pawl in engagement with the ratchet teeth, and a washer having an opening therein mounted over said spring to hold the same on the driving element, for permitting a portion of the Spring to be movable with the pawl as it rides over the crown ratchet teeth. x

7. A ratchet mechanism having a driving element, a pawl carried thereby, a driven element having ratchet teeth co-operating with the pawl, said pawl loosely mounted in an opening in said driving element, and a spring covering one end of said opening and acting to keep the pawl in engagement with said teeth, said spring so mounted that it may be rotated away from said opening to allow the pawl to be removed therefrom without changing the relative position of the driving element to the driven element.

8. In a ratchet driven mechanism, gear wheels for operating said mechanism, a hand operated driving element, ratchet teeth on one of said gears, a pawl for communicating the motion from the driving element to the gears by engagement with said ratchet teeth, said pawl inserted in an opening of said driving element, a leaf spring for holding said pawl in place,,said pawl having a groove therein for holding said spring against lateral movement.

9. In a ratchet mechanism, a gear train, one of said gears having crown ratchet teeth a on one side thereof, a hand operated driving

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