US860920A - Lock-out device for telephones. - Google Patents

Description

No. 860,920. PATENTED JULY 23, 1907. n. W. KNEISLY.

LOCK-OUT DEVICE FOR TELEPHONES.

APPLIUATION FILED JpLz'lz. 190s.l

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PATENTED JULY 23. 1907.

D. W. KNEISLY.

LOCK-OUT DEVICE POB. TELEPHONES.

APPLIUATION FILED JULY 12. 1906.

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OUT DEVIGB FOR TIHSLEPHoH-zsi APPLICATION FILED JULYIZ. 1906.

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DANIEL W. KNEISLY, OF DAYTON, OHIO.

LOCK-OUT DEVICE FOR TELEPHONES.

No. 860,92o.

Speceation of Letters Patent.

Patented July 23, 1907.

'Application filed July 12,1906. serai No. 325,750.

o all whom 'it may concern:

Be it known that I, DANIEL W. KNEIsLY, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Lock-Out Dcvices for "lolephones, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to lockout devices for party line telephones, and its object is to provide a device of this character in which, in calling a subscriber, it will only be possible to ring the called subscriber-s bell, the other bells on the party line not being affected.

A further object is to prevent any subscriber other than the one called from using his instrument and thus over-hearing or interrupting the parties talking.

And a further object is to accomplish these results with but a single break in the talking circuit at the subscriberls instrument.

With these and other objects in view my invention consists in the construction hereinafter described, and more particularly pointed out in the Claims.

Referring to the accompanying drawings, Figure l is a plan view of the device in its preferred form g Fig. 2 is a similar view with the addition of the several circuits; llig. 3 is a plan view of a modification; and Fig. 4 is a detail view of a portion of the selector plate, showing the Contact between said plate and the supporting bar 3.

In carrying out my invention in its preferred form I utilize the ordinary telephone casing, as shown at l, and in this casing I mount a frame or support 2, upon which l mount the several parts of the device. This frame is preferably made of hard rubber, fiber or similar material, and in addition to serving as a support also serves as an additional insulation between the several parts of the mechanism. However, it is not necessary that the support should be made of an insulating material, but maybe made of metal or any suitable material or may be dispensed with entirely and the several parts mounted directly upon the wall of the casing. At one side of the easing upon this frame I mount a guide plate or bar 3, preferably of brass, extending from the top ol' the casing to a point below the center line thereof. This bar is provided with a longitudinal slot Ll, adapted to receive and form a guideway for the pin or lug 5 on the selector plate 6 which is held loosely upon the guide bar by a screw '7 passing through the longitudinal slot S in the selector plate and entering a threaded opening 9 in the guide bar 3. By the proper adjustment of this screw the selector plate 6 is held upon the guide bar and allowed to slide freely thereon. The opposite edges of the selector plate G are provided with notches or oppositely facing ratchet teeth l0 and ll, the teeth ill on the outer edge of the plate serving merely detent teeth, while those on the inner edge serve as the selector teeth for the plate. The selector teeth l() are preferably one greater in number than the numb er of subscribers upon the particular line to which the device is connected. The recess l2 beneath that tooth corresponding in number, counting from the top, to the number of the particular instrument in which the device is mounted, plus one, is of considerably greater depth than the recesses between the other teeth, and the recess I3 above the upper tooth of the rack is of a depth greater than the recesses between the remaining teeth with the exception of the recess l2 and is of slightly less depth than that notch or recess. Upon the lower end of the guide bar 3 is mounted a contact plate 14 which is insulated from the guide bar 3 and adapted to contact with the lower edge of the selector plate 6 when the same is in its lowermost position, such Contact being` broken when the selector plate is moved as much as the space of a single tooth, as will be hereinafter described.

Mounted upon the frame 2 in the opposite side of the casing from the guide bar 3 is an operating magnet l5. This magnet is the usual double coil magnet and is provided with upper and lower armatures I6 and 17, respectively. The lower armature l7 has an outwardly extending arm 18, to the outer end of which is pivoted an upwardly extending bell-crank lever 19 having its upper end bent at an angle thereto to form a projection or tooth 20 which is adapted to engage the teeth l0 on the selector plate 6. A spring 2l is provided to hold this lever normally in contact with the teeth of said plate. Pivotally mounted upon the frame 2 at a point near the lower end of the guide bar 3 is a bar 22 which extends upward to a point near the top of the casing and-is provided with a tooth 23 at a point opposite the recess I3 of the plate (3, when said plate is in its lowermost position7 and to engage the successive teeth of said plate. At a point immediately above said tooth the bar 22 is provided with an arm 24 which extends across the guide bar 3 and is provided at its'outer end with a spring-pressed detent 25 adapted to engage with the teeth ll of the' plate 6. Near the upper end of said bar 22 are provided two contact screws 2G and 27 which contact with the contact plates 28 and 29 when the tooth 23 on the bar 22 is in engagement with the recess 12 of the plate 6, such contact being broken at all other times. Pivotally mounted beneath the guide bar 3 and near the upper end thereof and freely swinging therefrom is a detent arm 30, provided with a tooth 3l adapted to engage with a lug or projection 32 on the inner end of the receiver hook 33 which is pivotally mounted within the casing at 34. The tooth 3l on this detent arm is located at such a point that it will engage with the lug 32 when the receiver 35 is in place on the receiver hook 33 and will lock the said receiver hook in position with its inner end raised. Secured near the upper end of the bar 22 is a projection or arm 3G adapted to engage the detent arm 30 and force the same out of engagement with the lug 32 on the receiver hook 33 when the tooth 23 of the bar 22 has entered either the recess 13 or the recess 12 of the selector plate 6. The receiver hook is provided at a point beneath the bar 22 with an inclined projection 37 which is adapted to engage a tooth or pin 38 projecting from the under side of the bar 22, when the receiver hook is released and the inner end thereof descends to its lowermost position, for the purpose of disengaging the contact screws 26 and 27 from the contact plates 28 and 29..

The upper armature 16 of the magnet 15 is pivoted at its outer end to the frame at a point 39 and its inner end is pivotally connected to a link 4() which extends downward to a point near the arm 1.8 of the lower armature 1.7 of said magnet and is pivoted at its lower endto the arm 41, which, in turn, is rigidly secured to the upwardly extending bar 22 and forms therewith a bellcrank lever adapted to swing on a pivot 42 when the upper armature is attracted to the magnet. Secured to the link 40 at a point near the lower end thereof is a downwardly extending arm or lug 43, adapted to engage the arm 44 of the bell-crank lever 19 upon the descent of the armature 16 and disengage the tooth 20 of the lever 19 from the rack 10 of the selector plate 6. Thus, it will be seen that upon the descent of the armature 16 the bar 22 and the several parts carried by it, as well as the lever 1.9, are thrown. back and out of engagement with their several coacting parts.

1n order that the lower armature 17 may be operated independent of the armature 16 the bar 22 is provided with a spring 45 having a screw 46 for adjusting the tension thereof. This spring is of such tension that the current which is passed through the magnet 15 to operate the lower armature 17 is insufficient to so energize the magnet as to overcome lthe tension of the spring. A stronger current is passed through the magnet 15 when it is desired to operate the upper armature 16, as will be hereinafter described.

The receiver hook 33 is provided near its outer end with a spring 47 which exerts an upward pressure upon the hook. The receiver hook is provided on its upper side with a projection 48 which is adapted to close the Contact 49 of the talking circuit when said hook is in its uppermost position.

It is sometimes preferable to employ a second magnet for operating the bar 22 instead of using the second armature 16 on the magnet 15, and 1 have shown in Fig. 3 a modi lication of my device in which such second magnet may be employed. The magnet 1.5 is provided, with its lower armature 17 as hereinbefore described, but the upper armature 16 is dispensed with and in place thereof a magnet 50 is provided between the bar 22 and the magnet 15, or in any other suitable position within the casing. The bar 22 is provided on its face adjacent to said magnet with an armature 51. andthe lever 1.9 is provided with an. armature 52, both of which lie adjacent to the magnet 50 and are adapted to be attracted thereby when such magnet is. energized. The magnet 50 is mounted upon a brass bar 83 which in turn is supported from the frame 2. The cores in the coils of the magnet extend through the brass supporting bar 83 for the purpose hereinafter mentioned. Pivotally mounted between the two magnets 15 and 50 is an iron bar 84 having a contact screw 85 mounted on the end thereof and insulated therefrom. This binding post is connected to the source of electric current wh ich passes through the same and through the contact plate 86 to the magnet 15 when the bar 84 is in its normal position. Secured to the arm 84 at a point near its upper end is an iron bar or arm 87 extending above the magnet 15 and serving as an armature therefor. A spring 88 is secured to the arm 84 and has its opposite end bearing against an adjustable screw 89, and serves to hold the armature 88 normally away from the cores of the magnet 15 and the contact screw 85 on the contact plate S6. When the stronger current is thrown into the magnet l5, the said magnet is energized suiiiciently to overcome the tension of the spring 88 and attract the armature 87 against the cores of the magnet 15, and at the same time move the arm 84 in such a manner as to throw the contact screw 85 out of contact with the plate 86 and into contact with the plate 90, thereby shifting the current from the magnet 15 into the magnet 5() and energizing the same, thus attracting the armatures 5.1.

and 52 to disengage the bar 22 and lever 19 from their respective co-acting parts, and at the same time attract the iron bar 84 against the opposite ends of the cores of the magnets 50 and hold said bar against said cores and the contact screw against the plate 90 as long as the current is continued in the magnet 50.

When the line is idle and the several instruments at rest, the parts in the respective instruments are in the positions shown in Figs. 1 and 2 and the receivers 35 are on the hooks 33. With the parts in these positions, a subscriber calls the central office by operating the magneto 53, sending a current through the lines 54, 55, 77 to the line B and by lines 56 and 56 to the drop 57 in the central office, the current completing the circuit by passing through ground from 58 to 59 and then through the lines 60, 71., 61, 62, contact plate 14 and line 63 in the generator 53. At the same time the calling subscriber removes his receiver from the hook 33 which is immediately raised by the spring 47, thereby closing the Contact 49 and completing the talking circuit. As the inner end of the hook 33 descends, the inclined lug 37 engages the lug 38 on the bar 22, thereby moving the pivoted bar 22 away from the guide bar 3. As soon as the call is sent into the central oflice the operator there inserts the plug 64 in the jack 65 and throws the contact arm 66 into engagement with the contact 67 causing a single impulse or current to pass from the battery 68 through the contacts 67, 66, jack 65, line A, binding post 69 and line 70 to magnet 1.5, then by line 71, binding post 72 and line 60 to ground at 59, thence through the ground from 59 to 73 and thence to the battery 68. This single impulse passing through the magnet 15 attracts the armature 17, thereby operating the lever 19 and raising the selector plate G a single notch, in which position it is held by the tooth 23, the spring detent 25 preventing the selector plate 6 .f from moving more than the space of a single tooth for each impulse. The selector plate 6 of each instrument on the line having thus been raised, and the tooth 23 being in engagement with the first small recess of the inner rack bar of the plate 6, the bar 22 is held in the position farthest distant from the plate 6, thereby holding the projection 36 out of contact with the arm 30 and allowing the said arm to swing downward until the tooth 3l engages the lug 32.

Thus every instrument on the line, with the eX- ception of that of the calling subscriber, is locked in such a manner that the receiver hook cannot be raised, and, consequently, the talking circuit cannoty be closed. Having locked the several instruments, the operator then secures from the calling subscriber the number desired, and when this number is on the same line as the calling subscriber, the operator sends through the line a series of impulses equal in number to the number of the instrument with which it is desired to connect. These impulsesr may be sent either by a hand-operated make-and-break, or by an automatic pulsator of any'suitable construction. The selector plate in each instrument on the line is raised the space oi one tooth for each impulse sent through the circuit, and when the plate in the instrument of the called subscriber stops, the tooth 23 of the bar 22 is opposite the notch l2 oi' the plate G, and the pressure of the spring 45 against the bar 22 forces the projection 36 on the bar 22 against the pivot arm 30 and releases the hook or 4projection 31 on said armirom the lug 32 on the receiver hook 33, thereby permitting the receiver hook to assume its uppermost position when the receiver is removed therefrom. The movement of the bar 22 brings the contacts 26-28 and 27-29 into engagement and closes the circuitthrough their respective lines. Having sent the requisite number ot pulsations through the line, the operator then manipulates the switch 74 to send a current from the generator 75 through the line 76, jack G5, lines B, 77 and 55 to the bell 78, then through the line 79, contacts 28-26, bar 22, lines G1, 71 and G0 to theground at 59, thereby ringing the called subscribers bell. When the called subscriber removes his receiver, the hook 33 is moved by the spring 47 and the projection 37 thereon comes -into engagement with the pin 3S on the pivoted bar 22,

moving the said bar away iromthe guide-bar 3 and moving the screws 26-27 out of contact with the plates 28-29, thereby breaking the ringing circuit in that instrument. When the parties have finished talking and one of them rings off, the drop 57 in the central oflice is operated as before and the operator then closes his switch 6G with the contact 80, thereby throwing the combined strength oi the batteries G8 and S1 through the line A. As before described, the increased strength oi the current energizes the magnet 15 suliciently to attract the armature 1G against the tension of the spring 45, thereby retracting the bar 22 and lever 19, and the selector plate Gbeing releasedfrom the tooth 23 and arm 20 drops downward to its lower-most position, thereby retracting the several parts of the device to the normal or idle position.

Il' the subscriber called is on a line-different from that of the calling subscriber, the operator at the central otlice connects the two lines, sends a locking impulse through the lines thereby locking all the instruments, and then proceeds as in the manner just described where both instruments are on the same line.

While l have described my invention as embodying a reciprocating selector plate, l wish it to be understood that l do notlimit myself to this particular construction, but may use a plate oi any desired style, the essential feature of such selector plate being the notches oi different depths adapted to control the locking devices. Nor do l wish to be understood as limiting slotted selector mysehC to any of the details of construction herein described, as any suitable mechanism may be used. And further the operating currents Inay be all metallic circuits instead oi ground circuits, as above described.

l have also shown a device whereby other subscribers on the line may be prevented from ringing their bells While one instrument is in use. When the line is idle and the selector plate 6 rests upon the contact plate 14, the ringing circuit from the calling subscribers magneto is completed through line 63, plate 14, selector plate 6, bar 3. lines 62, 61, 7l and 60 to the ground at 59 and then back to the magneto. When one instru ment on the line is in use and the selector plate G raised and the other instruments locked against use, this circuit is broken between the Contact plate 14 and the selector plate G, as before described. .When the called subscriber has iinished talking and hangs up the receiver, the connection between the contacts 27 and 29 is restored and the ringing otl' circuit is completed from the magneto 53 through lines G3. 95, contaets 29, 27, bar 22, lines 61, 7l-and 60 to the ground at 59, thereby operating the drop in the central otlice from the same magneto, but over a di tt'erent circuit than that over which the calling signal was sent in.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent; ist- 1. In ar device of the character described, the combina tion, with the lockout mechanism, of a selector controlling the Same and comprising` a vertical plate having' a series of recesses therein, said `recesses being greater in number than the number of instruments on the line the uppermost of said recesses being adapted to `maintain theA lockout mechanism in its normal position and. one of said recesses being of greater depth than the others, and meansA for operating' said selector, substantially as described.

2. In a device of the character described, the combination, with a lockout `mechanism and a selector comprising a sliding plate having a seriesof recesses therein of different depths, a movable bar extending substantially parallel to said selector and having a tooth adapted to enter the recesses of different depths in said selectol'. thereby controlling the position of said bar, and means for operating said selector, substantially as described.

In a device of the character described, the combination. with the lockout mechanism, of a selector controlling the same, said selector comprising a plate having a series of recesses in the edge thereof, .one of said recesses beingo1' greater depth than the other recesses, a second recess of less depth than the first mentioned recess and of greaterv depth than the remaining recesses, and means for operating said selector, substantially as described.

-L In a device of the character described, the combina tion` with the lockout mechanism. of a selector controllin?` the same. said selector comprising a vertical bar, f' plate sliding on said bar, a series olr selectorteeth of different depths `on one edge of said selector plate, a series of detent teeth on the opposite edge thereof, a detent adapted to engage said detent teeth, and means for operating said selector, substantially as described.

In a device of the character described, the combination. with lockout mechanism, and a selector having a series of teeth in the edge thereof, of` a lever adapted to engage said teethand operate said selector, a magnet for operating said lever, a detent supported independent of said lever and engaging said selector for -preventing said selector from moving a greater distance than the space of one tooth at each movement of said lever and means controlled by the movement of said selector for actuating said detent, substantially as described.

C. In a device ofthe character described, the combination, with a lockout mechanism aud a selector having a series of teeth in the edge thereof, of a lever adapted to engage said teeth and actuate said selector, stop mechanism adapted to engage said teeth and hold said selector in its adjusted position, a detent carried by said stop mechanism and adapted to engage said selector to prevent the same from being moved a greater distance than the space of one tooth for each movement of said lever, and a magnet for operating said lever, substantially as described.

T. ln a device of the character described, the combina tion, with the lockout mechanism, of a selector device comprising a plate having a series of recesses ot' dill'erent depths in the edge thereof, a lever adapted to enter said recesses and elevate said plate, and means for operatii r said lever, a springpressed arm adjacent to said plate and movable toward and away from the same, and a tooth carried by said arm and adapted to engage said recesses to hold said plate in its elevated position, substantially as described.

S. ln a device of the character described, the combination, with the lockout mechanism, of a selector controlling said lockout mechanism comprising a plate having a series of recesses in the edge thereof, a lever adapted to engage said recesses and elevate said plate, means for operating said lever, a spring-pressed bar adjacent to said plate, a tooth carried by said bar and adapted to engage said recesses to hold said plate in its elevated position, an arm carried by said bar, and a detent on'said arm adapted to engage said plate and prevent the same from being elevated a greater distance than the space of one tooth for each movement of said lever, substantially as described.

9. In a mechanism of the character described, the comi binatiou, with the lockout mechanism, of a selector controlling the same and comprisingl` a sliding plate having a series of recesses in the edge thereof, means for engagingl said recesses and elevating srl-id plate the space of one recess at a time, a bar pivoted near the base oi' said plate, a spring tending to force said bar toward said plate, a tooth carried by said bar and adapted to engage said recesses to hold said plate in an elevated position, an arm carried by said bar and a spring-pressed detent carried by said arm and adapted to engage said plate to limit the upward motion of the same, substantially as described.

10. in a device of the character described, the combination, with the lockoutmechanism, of a selector mechanism comprising a plate having a series of recesses in the edge thereof, a lever adapted to engage said recesses and elevate said plate, means for operating said lever, a sprin pressed bar adjacent to said plate and movable toward and'away from the same, a tooth on said bar adapted to en e said recesses and hold said plate in its elevated position, means for rctraciing said lover and said bar to disengage the saine from the recesses in said plate and allow the same to return to its normal position, substantially as described.

11. ln a device rof the character described, the combina tion, with the lockout mechanism, of a selector mechanism for controllingr the same, comprising a plate having a series of recesses in the edge thereof, a bell-crank lever having one end adapted to engage said recesses to elevate said plate, a magnet adapted to operate said lever, a springpressed bar adjacent to said plate, a tooth on said bar adapted to engage the recesses in said plate and retain the same in its elevated position, an armature for said magnet connected to said bar and adapted to retract thc same when said armature iis attracted, and an arm carried by said armature adapted to engage said bell-crank lever and disengage the same from said plate, substantially as described.

12. in a device of the character described, the combination, with a lockout mechanism, of a selector mechanism controlling' the same and comprising a plate havinga series of recesses in the edge thereof, means for engaging said recesses to elevate said plate, a bar supported near said plate, means carried by said bar for retainingl said plate in its elevated position, a double ended magnet having an armature at one end adapted to operate said elevating means, and an armature at the opposite end connected to said bar and adapted to move the same away from said plate, means connected to said armature and adapted to' engage said elevating means to move the same out of en.`

Y recesses, and means for gageinent with said recesses, and means for operating said first-mentioned armature without ailecting the last-men tioned armature, substantially as described.

13. In a device of the character described, the combina tion, with a lockout mechanism, of a selector mechanism controlling the same and comprising a plate having a series of recesses in the edge thereof, means for engaging said recesses to elevate said plate, a bar supported near said plate, means carried by said bar for retaining said plate in its elevated position, a double ended magnet hav ing an armature at one end adapted to operate said clevating means, and an armature at the opposite end connected to said bar and adapted to move the same away from said plate, means connected to said armature and adapted to engage said elevating means and move the same out of engagement with said recesses, and a spring tending to hold said second armature away from said magnet, the tension of said spring being such as to withstand the attraction of said magnet When the same is e11- ergized for operating said elevating means, substantially as described.

14. ln a device of the character described, the combination, with the lockout mechanism, of a selector mechanism controlling the same and comprising a plate having a series of recesses in the edge thereof, one of said recesses being of. greater depth than the remaining recesses, means for elevating said plate, a tooth adapted to engage said releasing said locking mechanism when said tooth enters the deep recess, substantially as described.

15. In a device of the character described, the combina` tion, with the receiver hook and a detent adapted to hold the same in its inoperative position, of a selector mechanv ism comprising a plate having a series of recesses therein, one of said recesses being of greater depth than the others, means for elevating said plate, a tooth engaging said recesses, and means for engaging said detent and releasingl said receiver hook when said tooth 'engages the deep recess in said plate, substantially as described.

1G. ln a device of the character described, the combina tion, with the talking and ringing circuits, of the receiver hook adapted to control said talking circuit, a detent adapted to engage said receiver hook and hold the same in its inoperative position, a selector mechanism comprising a plate having a series of recesses therein, one of said recesses being of greater depth than the others, a second recess of less depth than said first-mentioned recess and of greater depth than the remaining recesses, means for elevating said plate, contact plates for said ringing circuit above said selectorplate, a spring-pressed bar adjacent to said selector plate, a tooth carried by said bar and engaging said recesses, a projection on said bar adapted to engage said detent and release said receiver hook when said tooth is in said second recess, contact screws also carried by said bar adapted to engage said contact plates to close said ringing circuit when said tooth is in said first-mentioned recess, substantially as described.

17, lo a device of the character described, the combination, with the talking and ringing circuits, of a receiver hook adapted to control said talking circuit, a detent enging said receiver hook and retaining the same in its inoperative position when the line is in use, a selector mechanism comprising a plate having a series of recesses in the edge thereof, one of said recesses being of greater depth than the remaining recesses, a second recess being of less depth than said iirst-mentioned recess and of greater depth than the remaining recesses, means for elevating said plate, a contact plate for said ringing circuit, a springpressed bar adjacent to said selector plate, a tooth carried by said bar and engaging said recesses, a projection carried by said bar and adapted to engage said detent and release said receiver hook when said tooth enters either of said iirst or second mentioned recesses, contact screws carried by said bar to close said ringing circuit when said tooth is in said first-mentioned recess, means carried by said receiver hook for moving said bar and breaking said ringing circuit when said receiver hook assuines its operative position and closes the talking cirA cuit, substantially as described.

18. In a device of the character described, the combination, with the lockout mechanism, of a selector mechan ism controlling the same and comprising a plate having a series of recesses in the edge thereof, one of said recesses being of greater depth than the remaining recesses, a tooth adapted to engage said recesses, and means connected to said tooth for retaining said instrument in locked position when said tooth enters the shallow recesses and for releasing said locking mechanism when the tooth enters said deep recess, and means for elevating said plate, substantially as described.

19. In a device of the character described, the combination, with the lockout mechanism, of a selector mechanism controlling the same and comprising a plate having a series of recesses in the edge thereof, an unlocking recess near the upper end of said plate of greater depth than its adjacent recess, and a circuit closing recess of greater depth than said unlocking recess, a toothadapted to engage said recesses, and means connected to said tooth for unlocking said instrument when said tooth enters said unlocking recess and for locking said instrument when said tooth engages the recess next adjacent to said unlocking recess, and means for unlocking said mechanism and clos- .ing said circuit when'said tooth enters said circuit closing recess, and means for elevating said plate, substan tially as described 2l). In a device of the character described, the combination, with the lockout mechanism, of a selector mechanism controlling the same and comprising a plate having a series of recesses in the edge thereof, an unlocking recess at the upper end thereof being of greater depth than its adjacent recess, a circuit closing recess corresponding in number to one more than the number of the particular instrument to which said selector mechanism is attached and being of greater depth than said unlocking recess, a tooth adapted to engage said recesses, and means con nected to said tooth for unlocking said instrument when said tooth is in engagement with said unlocking recess, for locking said instrument when said tooth engages the recess next adjacent to said unlocking recess and for locking said instrument and closing said circuit when said tooth engages said circuit closing recess, and means for elevating said plate, substantially as described.

21. In a device of the character described, the combination, with the lockout mechanism, of a selector mechanism controlling the same and comprising a plate having a series of recesses in the edge thereof, said' recesses varying in (leptin, a springpressed tooth engaging said recesses, means connected to said tooth for controlling said locking mechanism according to the depth of the recess engaged thereby, a lever adapted to engage said recesses, a magnet operating said lever to elevate said plate the space of one tooth at a time, and means for sending a series of pulsations through said magnet for raising said plate a sufii cient number of recesses to allow said tooth to engage any desired recess, substantially as described.

22. In a device of the character described, the combination, with the lockout mechanism, of a selector mechanism controlling the same and comprising a plate having a series of recesses in the edge thereof, two of said recesses being of greater depth than the remaining recesses, a tooth adapted to engage said recesses, means connected to said tooth controlling said locking mechanism according to the depth of the recess engaged thereby, substantially as described.

In testimony whereof, I affix my signature in presence of two witnesses.

DANIEL W. KNEISLY.

Witnesses MARY HOCKEY,

IDA M. Rnnsn.

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