US1125492A

US1125492A - Signaling device for polystation-circuits.

Info

Publication number: US1125492A
Application number: US27345905A
Authority: US
Inventors: William W Dean; Curtis B Camp
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-08-09
Filing date: 1905-08-09
Publication date: 1915-01-19
Anticipated expiration: 1932-01-19

Description

W. W. DEAN.

SIGNALING DEVICE FOR POLYSTATION CIRCUITS.

APPLICATION FILED AUG. 9, 1905.

1,125,492, Patented Jan. 19, 1915.

2 SHBETSSHEBT 1.

THE NORRIS PETERS C0 PHOTO-LITHO.. WASHINGTON, D

W. W. DEAN.

SIGNALING DEVICE FOR POLYSTATION CIRCUITS.

APPLICATION FILED AUG. 9, 1905.

1,125,492.; I Patented Jam 19, 1915.

2 SHEETS-SHEET 2.

UNITED STATES PATENT ornion.

WILLIAM W. DEAN, or :ELYR'IA, OHIO; CURTIS B. CAMP, TRUSTEE, APPOINTED BY COURT.

SIGNALING DEVICE FOR POLYS'IATION-GIRCUITS.

Application filed August 9, 1905.

To all whom it may concern Be it known that I, VVILLIAM W. DEAN, a citizen of the United States, residing at Elyria, in the coimty of Lorain and State of Ohio, have invented certain new and useful Improvements in Signaling Devices for Pplystation-Circuits, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to signaling devices for poly-station circuits, and comprises a polarized ringer having its armature mounted in a neutral position upon a strong spring, so strong that ordinary ringing current momentarily applied produces no effect. Only when current of the proper frequency has passed through the ringer coils for a long enough period to start up the armature and the tuned clapper, do the gongs receive any stroke. I tune the clapper rods or reeds by fastening thereon clappers formed in cylindrical shape and of different lengths and weights.

view of the same. Fig. 13 is atop plan View with the gongs removed. Fig. 4: is a bot- .tom plan view. Fig. 5 is a perspective view of the clapper rod and connected parts removed.

I will first describe the mechanical structure of my ringer, and then point out the method of its employment.

Referring to Figs. 1 to 5, A designates a pair of magnet spools with cores a, a, secured by screws a upon the yoke B. At the lower ends of these cores is carried a secondary non-magnetic yoke B, the same being secured by the nuts 6, 6 upon the sleeves, 6 secured to the magnet heads or in any other suitable manner. The yoke B has front and reardrop portions; 6 6*, each slotted as indicated at b for the re ception of the ends a, c, of the armature block or bolt, C. Oneachof these is fitted a lock-nut, 0 Thisblock-and.itsconnected parts are best shown in Figs. 4 and 5 the block, C, is preferably squared throughout .that portion of :its length which lies between the parts b b", ,its'ends being reduced and threaded at 0,0. The squared portion is milled out onone side to receive thestifii', short leaf-spring, (1?. To hold this in position on the block, a short bar, 0 is clamped Specification of Letters Patent.

Patented Jan. 19, 1915.

Serial No. 273,459.

upon it by means of screws 0 Secured upon the spring above the block is the armature C. This is made of pressed metal in two halves, c, 0", each having an upstanding flange, 0 These two flanges are set upon opposite sides of the spring and secured together through the latter by means of rivets, 0 Each flange is formed with a semi-cylindrical channel to one side of the spring, and an outside rivet, 0 the channels when put together receiving the clapper rod, G which is thus secured rigidly to the armature structure by the common binding means. At its upper end the clapper rod is fitted with the clapper, C, composed of a length of tubing solidly driven on the rod. The length of this tube varies according. to the tunedesired.

In assembling the device the ends of the block, C, are inserted from beneath into the slots, If, the clapper rod at the same time passing up through an opening, 0 in the yoke, B, and lying in front of the upper yoke, B, between the gongs, G. The armature having been adjusted with regard to the poles, cf, of the ringer magnet, the nuts, cflare set up tightly, and thereafter the only movement of the armature possible to make is that permitted by bending the spring, G Secured upon the upper yoke and passing down behind the magnets into contact with the rear nut, 0 is the permanent magnet, M, and as the upper yoke, B, and the block, C, with its parts, are of iron, it follows that a very efficient magnetic circuit is thus obtained, the only breaks in which are the airgaps between the poles, a and the armature, C. The gongs, G, are mounted upon posts g, the latter being carried upon metal segments, Z2 each pivoted at 5 upon a suitable bolt passing through the yoke B. At its front edge, (2 each segment is provided with gear teeth meshing with the worm, I), cut on the stem of the bolt, 5 This bolt,

.7), has its ends supported in drop bearings formed in book shape on the yoke, B, as shown at 7), Figs. 1, Zand 3. In order to get the best results with this ringer, an accurate adjustment of the gongs is necessary, and this adjustment moreover must be solid,

so that when the parts are once set they will remain undisturbed by the forcible action which I contemplate. The gong posts pass up from the segments through lateral enlarged openings, 67, in extensions, 5, on the yoke,

By means of a suitable wrench applied to the head of either bolt, b the same may be turned, and the worm thereon will move the segment one way or the other and with it the gong post and gong.

It will be observed that the construction of my ringer throughout is such as to make it very solid and substantial. Its depreciation through a long period of time is intended to be negligible, and its operation uniformly efficient throughout its life. It is so designed that it may be substituted for an ordinary bridging ringer, or in fact for any ringer at any station, having parts of standard type. The sizes and general arrangement of parts are such that no special features are required in the rest of the telephone set to permit the use of this ringer.

It is to be understood that in a system employing four of my tuned ringers momentary current of right or wrong frequency will not effectively move any of the four armatures. If the current continues to flow for a brief period, however, the armature at that station which is tuned to respond to the selected frequency gradually gets into motion. As it is pulled over, the strength of the magnetic pole strongly increases, and in order to get a powerful effect, and in fact relying as I do upon what might be termed sheer brute force, I discard all delicate adjustments and safeguards, and strip the magnet pole so that the armature may come into direct contact with. it. 'I thus get a maximum pull and a maximum effect on the clapper just when I need it the most, that is at the instant of possible interference due to reactive vibration from the gong. Thus I start my selective ringer by tuning it exactly, so that it will respond before striking the gong, and after it has once started to vibrating I provide a strong enough action to positively overcome any interference. Those ringers, however, which have not started into good vibration, owing to their being out of tune, are of course unaifected, and I may add that the strength of the springs, C is such that it takes almost perfect resonance to overcome their stiffness.

Having thus described my invention, What I claim and desire to secure by Letters Patent is:

1. In a harmonic ringer for telephone party-lines, a yoke, a pair of electro-magnets carried thereon, a pair of gongs and gong posts adj ustably secured to and carried upon said yoke, supporting ears upon said yoke, a threaded spindle mounted in said ears in proximity to each gong post and adapted to move the same when turned, a second or supplemental yoke carried upon the electromagnets, a fiat spring secured to saidsupplemental yoke and extending in a direction parallel to and intermediate of the magnet cores, a transverse armature secured to and suspended upon said spring, the ends of the armature projecting both ,Ways from the spring into proximity to the free poles of the magnets, and a clapper-rod for the gongs mounted upon the armature and carrying a clapper of substantially uniform diameter, substantially as described.

2. In a harmonic ringer for telephone party-lines, a yoke, a pair of electro-magnets carried thereon, a pair of gongs and gong posts adj ustably secured to and carried upon said yoke, supporting ears upon said yoke, a threaded spindle mounted in said ears in proximity to each gong post and adapted to move the same when turned, a second or supplemental yoke carried upon the electromagnets, a flat spring secured to said supplemental yoke and extending in a direction parallel to and intermediate of the magnet cores, a transverse armature in two parts riveted to and supported upon said spring, the ends of the armature projecting both ways from the spring into proximity to the poles of the magnets, and a clapperrod for the gongs mounted upon the armature and carrying a clapper, substantially as described.

3. A telephone ringer having a clapper rod supported on a spring, a cylindrical clapper having its axis coincident with the axis of the rod, gongs supported on opposite sides of the clapper, a transverse armature connected to the clapper rod, a pair of electromagnets for rocking said armature and thereby forcing the clapper against the 'ongs alternately, a supporting yoke for the armature, a bridge block for said yoke, and a short, stiff, leaf spring mounted upon the bridge block and centrally connected to the armature, substantially as described.

4. A telephone ringer having a clapper rod supported on a spring, a cylindrical clapper having its axis coincident with the axis of the rod, gongs supported on opposite sides of the clapper, a transverse armature connected to the clapper rod, a pair of electromagnets for rocking said armature and thereby forcing the clapper against the gongs alternately, a supporting yoke for an armature yoke carrying a stiff leaf spring centrally connected to and supporting the armature, and a cylindrical clapper for the gongs carried intermediate thereof on the clapper rod and having the axis of its curvature lying in the axis of the rod,

the length, position or weight of the clapper determining the pitch or period of the ringer, and the cylindrical form thereof permitting of variations in its positioning upon the clapper rod without affecting the length of stroke, substantially as described.

6. In combination with a telephone ringer, a gong adjusting mechanism consist ing in a supporting frame, a plate pivoted to such frame, a post secured in such plate for supporting such gong, such plate toothed on one edge a screw carried by such frame and engaging the toothed edge of said plate whereby rotation of such screw changes the position of such post relatively to such frame.

7. In combination with a telephone ringer, a gong adjusting mechanism consisting in a supporting frame, a plate pivoted to such frame, a post secured in such plate for supporting such gong, a screw carried by such frame and adapted to engage such plate whereby rotation of such screw changes the position of such post relatively to such frame.

8. In a telephone ringer a clapper rod a spring supporting said rod, a clapper for the rod, gongs supported on opposite sides of the clapper, a transverse armature connected to the clapper rod, a pair of electromagnets for rocking said armature and thereby forcing the clapper against the gongs alternately, and a supporting yoke for the armature, said yoke connected to said supporting spring on the opposite side of the armature from the yoke support.

9. In a harmonic ringer, a pair of electromagnets, a pair of gongs, an armature extending across the poles of the electromagnets and adapted to be attracted alternately thereby, a clapper rod carried by the armature for striking the gongs, and a spring for supporting the armature so that the poles of said electromagnets are upon one side of the armature andthe support for the spring is upon the opposite 'side thereof.

10. In a harmonic ringer, a pair of electromagnets, a pair of gongs, an armature extending across the poles of the electromagnets and adapted to be attracted alternately thereby, a clapper rod carried by the armature for striking the gongs, a yoke carried by the working ends of the electromagnets, and a tuned spring carried by said yoke, said spring supporting the armature between the point where the yoke is carried by the electromagnets and the point where the spring is carried by the yoke.

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

WILLIAM W. DEAN. Witnesses RAY I-I- MANSON, GEO. A. SCOVILLE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. O.