US1161854A - Calling device. - Google Patents

Description

0. F. FOR'SBERG.

CALLING DEVICE.

APPLICATION FILED MAR.9. 191s.

1,161,85, Patented Nov. 30, 1915.

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CALLING DEVLCE.

APPLICATION FILED MAR. 9, I9l5. 1,161,854.

Patented Nov. 30, 1915.

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CALLING DEVICE. APPLICATION FILED MAR. 9. 1915.

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0. F. FORSBERG.

CALLING DEVICE.

APPLICATION FILED MAR. 9, I915. 1,161,854, Patented Nov. 30, 1915.

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ED'VSTATE'S PATENT oFFIoE.

OSCAR F. 'FORSBERG, YONKERS, NEW YORK, AS SIGNOR TO WESTERN ELECTRIC COMPANY, OF YORK, N. Y., A CORPORATION OF ILLINOIS.

CALLING DEVICE.

To all whom it may concern:

1 Be it lmown that I, OSCAR and more particularly to impulse senders for automatic or semi-automatic telephone systems in which the selector switches used for the building up of a connection are directively controlled by current impulses sent from a subscribers station or an operators position.

' The object of this invention is-to provide a new and-improved calling device which is simple in construction which may be readily assembled, and in whlch the adjustable parts can be reached without the necessity of dismantling the device.

Other new and useful features of this invention will appear from the following detail description and the appended claims.

Inthe drawings, Figure l is a plan view of the calling device; Fig. 2 is a side elevation thereof; Fig. 3 isa bottom view thereof Fig. 4: is a sectional view on lines 44 of Fig. 5; Fig- 5 is a sectional view on lines 5-5 of Fig. 4; Fig. 6' is a perspective view {of the difierent parts of the calling device before assembly; Fig. 7 shows the speedgoverning mechanism in its normal position, the view being taken on lines 77 of Fig. 8; Fig. 8 isa sectional View of the speed governing mechanism the view being taken on'lines 88 of Fig. 7; Fig. 9 is a view corresponding to Fig. 7, showing the speedgoverning-mechanism in its actuated position. Y

The diflerent parts of the calling device are held together by means of a shaft 1. At one end shaft 1 has an enlarged portion forming ahead 2. A dial 1 is fastened to an enlarged portion 3 of shaft 1. The dial may be'actuated by means offinger holds 5 provided around its periphery.

In the center of dial 4: is fastened a plate 6 on which the necessary instructionsas to the handling of the device may be engraved or printed. Head 2 of shaft 1 is positioned in the cavity formed between plate 6 and the dial 4., and the user is thus prevented fromdismantling the device. Fastened to Specification of Letters Patent. Application filed March 9,1915. Serial No. 13,126.

F. FoRsBERo,'a citizen of the United States, residing at.

Patented Nov. 30, 1915.

a plate 7 is a ring 8 carrying characters, such as numerals .1 to 0, each of said characters corresponding to one finger hold 5. The proper spacing between dial 1 and the rmg 8 s insured by a ring 9. The plate 7 has a cup-shaped portion 10 projecting through rmg 8'and ring 9, and said plate is carr1ed on and arranged for rotation with portion 3 of shaft 1. WVithin said cupshaped portion10 is a drum llalso engaging portion 3 of shaft 1 and carrying an impulse wheel 12 and a'gear wheel 13 held together by means of a stud 1 4. Dial 4,

plate 7 and drum 11, with the parts carried by them, are clamped between head 2 of shaft 1 and a nut 15 adapted to engage a screw-threaded portion 3 of shaft 1. Below nut 15, motor spring 16 is provided, one

end of which is secured to the shaft by engaging one of several slots in nut 15, and the other end to a base 17. Shaft 1 extends through a hub 19 secured to base 17. To screw-threaded end 20 of shaft 1 is fastened, by means of a nut 21, an arm 22 carrying a roller 23 of insulating material." It will be seen, therefore, that all the operating parts of thecalling device are held together by a single screw-threaded means, i. e. nut 21. By unscrewing nut' 21 the device may be taken apart. Since the device is preferably mounted in a telephone desk or wall set,

the user does not have access to nut 21 and is unable to tamper with the adjustment of the apparatus. 4

Extending through an opening 24 of base 17 and pivoted between projections 25 of base 17 is a pawl 26. One arm 27 of'said pawl is adapted to be engaged by the teeth of impulse wheel 12, and another arm 28 of pawl 26 extends outside of base 17 and carries a roller 29 of insulating material. Roller 29 is adapted. to actuate contact spring 30 cooperating with contact spring 31 suitably mounted on but insulated from the outside of the base 17. Contact springs 32 and 33, which are also mounted on the outside of base '17, are normally maintained open by roller 23 engaging contact spring 33. A coiled spring 31 tends to keep pawl 26 in its normal position, i. c. with roller 29 out of engagement with contact spring 30 and with the arm 27 in the path of the teeth. of the impulse wheel 12.

Projecting outward from base 17 is a cup 35." Mounted on the inner surface of base ed on studs 43 and 44, respectively. Friction member 45 carries a leaf spring 47,

. and friction member 46 a leaf spring 48. A

substantially S-shaped member 49, loosely mounted on spindle 37 beneath bridge-piece 42, engages, by means of its arms 50 and 51, the free ends of leaf springs 47 and 48, respectively. By means of a screw 52 extend ing from bridge-piece 42 through an opening 53 of the S-shaped member 49, this member may be fixed in various positions I so as to adjust the tension of leaf springs spring 16.

plnion causes a spindle 56, journaled be- 47 and 48. As shown in Fig. 3, openings are provided in thebottom of cup 35, through which free access may be had to screw 52 to permit the governor to be readily adjusted without disturbing the other parts of the calling device. The leaf springs tend to maintain friction members 45 and 46 111 the position shown in Fig. 7'.

Other details of construction will be understood from the following description of the mode of operation of the device.

If the user desires to send out, for instance, a signal corresponding to the number 3, he engages with his'finger the finger hold 5 opposite which numeral 3 appears, and rotates the dial in a clockwise direction until a stationary stop 54 is reached. In response to the actuation of dial 4, shaft 1, plate 7 and the ring 8 carried thereby, drum 11 and the impulse wheel 12 and gear-wheel 13 provided thereon, are rotated in a clockwisedirection. Nut 15 is also rotated with shaft 1 and causes the winding up of motor Gear-wheel 13 meshing with a tween bridge 36 and base 17, to rotate in a counter-clockwise direction. Fastened .to splndle 56 is .a gear-wheel 57 which transmits the motion of gear-wheel 13 to pinion 38 of the speed-governing mechanism, and rotates spindle 37 of the governor in a clockwise direction. The ratchet wheel 39 slides by the pawl 40 pivoted on stud 43, thereby allowlng pinion 38 and spindle 37 to rotate in a clockwise direction, the friction members 45 and '46 remaining in the position shown in Fig. 7. It will be seen therefore that the governor does not operate or exert any speed controlling action while the dial is being set by rotation in'a clockwise direction.

During the forward rotation of impulse wheel 12, arm 27 of pawl 26 is vibrated by the ratchets of the impulse wheel, but arm 28 of pawl 26 is moved from contact spring 30 and therefore does not cause the opening and closing of the contact springs 30 and31.

When dial 4 was moved out of its normal position, roller 23, which normally keeps contact springs 32 and 33 open, allowed said contact springs to close. Contact springs 32 and 33 may be connected to the operators telephone set in such a manner as to shortcircuit it while signaling impulses are being sent.

When the user releases dial 4, z. e. removes his finger from the engaged finger hold, shaft 1 and the elements fastened thereto are rotated in a counter-clockwise direction by the power stored up in motor spring 16. Impulse wheel 12 now vibrates arm 27 of pawl 26 but in a direction to cause arm 28 to engage spring 30, and thereby to open and close the contact between springs 30 and 31. In the device shown, in signaling the number 3, said springs will be opened and closedthree times resulting in the sending out of three impulses which may serve to govern a switch in its selective movement in a well-known manner.

Gear-wheel 13, being rotated in a counterclockwise direction, causes spindle 37 f the speed-governing mechanism to rotate also in. a counter-clockwise direction. Springpressed pawl 40 now engages ratchet wheel 39, and as this pawl is pivoted at 43 it causes bridge- pieces 41 and 42 to rotate in a counter-clockwise direction. Due to the centrifugal force, friction members 45 and 46, which rotate with said bridge-pieces, fly outwardly against the tension of leaf springs 47 and 48, and press the rubber studs 45 and 46 against the wall of cup 35. Due to the friction between studs 45 and 46 and the wall of cup 35, the return movement of shaft 1, and thereby that of impulse wheel 12, is reduced to a speed predetermined by the adjustment of leaf springs 47 and 48. When shaft 1 and therefore thewhole mechanism reach their normal position, roller 23 again engages contact spring 33, thereby opening said contacts and removing the shunt around the users telephone set.

As shown in Fig.3, a terminal strip 65, to which the line conductors are connected, is provided on the outside surface of base 17.

Although in the claims the movable setting member of the calling device is referred to as a dial, it will be apparent that this invention is applicable to impulse senders which are set by manually movable members of; widely varying character.

What is claimed is:

1- Ina calling device, a rotatable shaft, a

. dial carried thereby and having a plurality of finger holds, a plate carrying digit characters designating said finger holds, an impulse Wheel on said shaft,'a gear wheel on said shaft cooperative contacts adapted to be actuated by said impulse wheel in ac cordance with the rotation of the shaft, a governing mechanism driven from said gear wheel, and a single clamping means for maintaining said'shaft, dial, plate, and impulse and gear Wheels in their normal position in relation to each other.

2. In a calling device, a rotatable shaft, a dial carried thereby and having a plurality of finger holds, a plate carrying digit characters'designating said finger holds, an impulse wheel and a gear wheel on said shaft, cooperative contacts adapted to be actuated by said impulse wheel in accordance with the rotation of said shaft, a governing mechanism-driven from said gear wheel, and a single screw-threaded means applied to the shaft for maintaining said shaft, dial, plate, and impulse and gear wheels in their normal position in relation to each other.

3. Ina calling device, a rotatable shaft, a dial carried thereby and having a plurality of finger holds, a plate carrying digit characters for designating said finger holds, an

impulse wheel and a gear wheel on said shaft, a base, a single screw-threaded means for maintaining said shaft, dial, plate, and

impulse and gear Wheels in their normal position in relation to each other, a single clamping means for maintaining said shaft and said base in their relative normal position, a governor mounted ;on said base and driven from said gear Wheel, cooperative contacts, and means controlled by said impulse wheel for actuating saidcontacts in accordance with the rotation of said shaft.

4. In a calling device, a rotatable shaft, a dial carried thereby and having a plurality of finger holds, a member carrying digit characters for the designation of said finger holds, a platecarrying said member, a cupshaped portion for said plate, an impulse Wheel carried Within said cup-shaped portion, a single screw-threaded means for maintaining said dial, shaft, plate and impulse wheel in their relative normal posi tion, and contacts actuated by said impulse wheel in accordance with the rotation of said shaft.

In Witness whereof, I hereunto subscribe my name this 8th day of March, A. D. 1915.

OSCAR F. FORSBERG.

Witnesses: E. EDLER,

K. L. STAHL.

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