US1545276A

US1545276A - Selecting mechanism

Info

Publication number: US1545276A
Application number: US515443A
Authority: US
Inventors: Pfannenstiehl Harry
Original assignee: Western Electric Co Inc
Current assignee: AT&T Corp
Priority date: 1921-11-16
Filing date: 1921-11-16
Publication date: 1925-07-07
Anticipated expiration: 1942-07-07

Description

July 7,1925. I 1,545,276 H. PFANNENSTIEHL' V 4 SELECTING MECHANISM 2 Shets-Shet 1 neural) s-T TEs ELECTRIC" COMPANY, INCORPQRATED, NEW YORK.

' SELECTING Application filed November To all whom it may concern: Be it known that I, HARRY PFANNEN s'rnz-nn, a citizen of the United States, residing at Maplewood, in the countyof Essex, .State of New Jersey, have invented certain new and useful Improvements in Selecting Mechanisms, of which the following is afull, clear,'concise, and exact description.

This invention relates to selecting mechanism and particularly to" selecting mechanism of the manually controlled type,

An object of the invention is a selecting mechanism and a distributing mechanism utilizing a single movable transmitting contact combined in a unitary structure.-

Another object is anarrangement wherein the code combinations of message impulses are transmitted to a ,lineconductor solely cient. in operation.

broken line 22 of Fig. 1.

through the instrumentality of mechanical movements.

Another objectof the invention is to pro vide a selecting mechanism which is simple in construction, positive reliable and efii- In accordance with the aboveobjects the present invention contemplates the provision of manually operated keys, which cooperate with slidable members or bars adapted to be moved from their normal 'positions of restwhereby rockerarms are positioned selectively, and which arearranged to be actuated consecutively by cams to vibrate a single transmitting contact.

Referring to the drawings:

. Fig. 1 shows a partial plan view of a keyboard with the selecting elements and the distributing mechanism.

Fig. 2 is a sectional view taken along the Fig. 3 shows the mechanism, illustrated in F1 g. 2, in a different operative position. Figs. 4 and 5 are sectional views taken along the broken line 44 of Fig.-- 1- and show the selecting and selectable elements.

in their non-selecting and selecting-positions,

' respectively.

- Fig. 6 is a perspective of a portionfof the apparatus shown in Fig.1. I v

- In the illustrated embodiment of the invention, the keyboard is arranged like the keyboard of an ordinary typewriter, each key being capable of'independently performing the selecting operations required to position selectable elements to'produce the do sired selecting operations. Each key lever PATENTpOFlf-NE- nanny PFAZNNENSTIEHL, or MAPLEWOOD, NEW JERSEY, l ls sxoagmn. 'ro wns'rnan or EW. YORK, N. Y., n conroaa'rrou or 1 with springs 9 normally tending to "elevate the outer 1 end thereof. The;-springs and" pivots, although not. shown in ,detail, are

similar 'iri ponstruction to the arrangement disclosed :in' Patent No. 1,229,201, issued June 5,1917. Each key lever has towards the rearthereof-a knife-like portion 6 serving to move upon the actuation thereof the,

selectingelenients. in varying combinations;

- Situated-directly above and extending/in a direction transverse to the key levers .7 2'

are six slidable selecting members 11-, 12, 13, 14:, 15 and '16 a. stationary member 17.v The-frame 8 is provided with slotted

members

18 and 19 .whioh'serve to support and;

guide the members-11 to 16 inclusive. 'Each of the selecting members 11 to 16 inclusive has thereon a different arrangement of downwardly projecting beveled edges 20, so that these-members w1ll be moved in varying combinations according tothe key lever l depressed. When anyone of the key levers is depressed the knife edge 6 engages the beveled projections 20 on the selectlng members so that these members will-be moved in a direction transverse to the position of the key levers in accordance with a predetermined arrangement. The selecting member 11, however moves upon'the depression of any one of the key levers 7 for effecting certain selecting operations, and is provided at one extremity thereof with a stop 21 and a member 22 mounted just abovegthe sto arm 21 one surface of which is slightly. Each of the selecting members 12 to 16 inclusive have notches 23 cut on the upper surface and atone end thereof and in which an operating link normally rests, there being an operating link individual to each one of these bars. The operating links 28 to 33 inclusive are pivoted to a revolvable bail 34supported by arms 35 and 36,. which are in turn, fixed on a rod 37.

Situated directly beneath the other end of the operating links '28 to 33 are a series of cams 4:4 spaced equally distant along a shaft 39 and separated by metal discs 25, so that upon rotation .of the shaft the operating links will beengaged by their associated cam for effecting their movement consecutively. The cams and metal discs are held in posigti'on by,-.means of bushin' s 38 and 46 which incline mally, the shaft 39,having secured on one extremity thereof -a beveled gear 40, tends to rotate by power communicated thereto from a motor 41 driving a beveled gear 42, through a slip friction clutch but is restrained against motion by thestop arm 43 rigidly secured to the shaft 39 engaging the stop 21, which, as previously described, is secured to the selecting member 11.

Mounted directly above bail 34 and in a position central thereto and arranged to be engaged by a circular, disc 27 is a single transmitting .contact 45. This contact 45,

when the shaft 39 is at rest, engages a conconnected directly to battery or ground, as

the case may be,'or through the winding of a selecting magnet of a printer, while the contact'47 is permanently connected to the line conductor 61 extending to a distant station, and over which it is desired to transmitthe desired code combinations of 'message impulses in accordance with the depres'sion of the desired key lever 7. Moreover the double polarity system may be used with equally good results, in which the contact spring is normally in contact with marking battery while spacing battery is connected with theopposite contact, in that the contact may be moved to change the polarity tothe current applied to the line conductor. 1

portion thereof being formed in the shape of a knife-edge to more readily permit of the movement of a downwardly and; horizo'ntally'projecting portion 56 of a locking bar 52. Bar 52 is pivoted to the frame at 53 and has an extending portion thereof which 1 v is arranged to be engaged by a 'cam 55 on the shaft 39 as shown in Fig. 2. During the period that the shaft 39 is at rest the projecting portion 56 of the member 52 is withdrawn from the slots 50 and 51, thereby scribed is as follows: Assume that one of the vkey levers 7 has been. depressed, the common member 11 is moved in the direction of the arrow thereby moving the stop 21 out of the path of the stop arm 43, and since'power is communicated to the shaft 39 through a-slip friction clutch, this shaft will be revolved. Aspreviously stated, the contact spring 45 is normally in engagement with the contact 47.. However, the instant the shaft 39 is set in rotation the 'cam associated with the'operating link 33 moves out of the path thereof thereby allowing the bail 34 with the disc 27 to drop and consequently open the circuit between contact spring 45 and contact 47, thus transmitting what is known as a start impulse. Also immediately following the setting of the shaft 39 into rotation, the member 52 is moved sothat the projection 56 engages one orthe'other of the notches 50 and 51 in the selectingimembers 12 to16 inclusive,

depending upon the position of these memhers, thereby preventing their movement until the present selection has been cleared out. Let it also for the sake of clearness be assumed that the selecting members 12, I

members remain in the opposite position As the shaft 39 continues its rotation, the

selecting member 12 having been moved in thedirection of the arrow, causes the end of the'operatin link 28 to rest upon the upper surface 0' the bar 12. Upon the engagement of the associated cam, with the link 28, this link will be fulcrumed on'bar 12, thereby raising the bail 34 and efi'ectin a. closure between the contact spring 45v and the contact 47. -A condition similar to the one described in connection with the select ing member 12 will, however, be established upon the engagemen t of the cams individual to the

operating links

30 and 32, respectively, as the selecting members are moved so as to form a fulcrum for their respective operating links.

For the selection of the operating link 29 one end of this link remains in the notch of the selecting member 13 so that upon the engagement of its associated cam therewith the contact spring 45will be allowed to disengage contact 47 so that an open.

circuit condition will be established with the line. described will take place upon the engage- A condition similar to that just mcnt of-the cam individual to the operating I link 31 associated'with the selecting member 15. I

Following the engagement of the associated cam with the operating link 32, the cam individual to the operating link 33 causes the bail 34 to be lifted as the other end of this link is fulcrumed on the stationary member 17 thereby closing the contact between contact spring 45 and contact 47 for transmitting a releasing impulse over the line 61. Just prior to the completion of the cycle of the rotation of the shaft 39 the cam associated with the member 52 engages the projection thereof, thereby lifting the projecting portion 56 out of engagementwith the notches 50 or 51, and, in

turn, permitting the setting up of a new scribed in connection with a particular structure, it is, of course, obvious that many other adaptations thereof may be made without departing ,from the spirit and scope of the present invention.

Whatis claimed is:

1. A telegraph transmitter comprising a series of selecting elements, manually actuated means operative to directly set said elements in various combinations, a plurality of pivoted members extending horizontally beyond the ends of said selecting elements and arranged to be fulcrumed on a surface thereof, a transmitting contact, and means for rotating said pivoted members about said selecting elements as a fulcrum to effect the actuation of said contact in accordance with the setting of said elements. 1

2. A telegraph transmitter comprising a series of selecting elements, each having a notch arranged near its end, means for. actuating said selecting elements in various combinations, a plurality of members, one individual to each of said elements and having a free end arranged to engage a surface of saidelements beyond the notch therein, means for actuating the members which have their free ends engaging a surface of said elements, and a switch contact operated in accordance with the actuation of said members.

3. A telegraph transmitter comprising a series of actuating members a plurality-of selecting elements, each having a notch arranged near its end, means for selectively moving said elements to either bring said notch into or'out of registry with the free end of said actuating members, a transmitting contact, and means cooperating with said members for actuating said contactinaccordance with the setting of saidelements with respect to said members.

4. A telegrapli transmitter comprising a plurality of notched code bars, key levers for actuating said code bars in various combinations, a single set of selecting elements conditioned foroperation due to the movement of said code bars, a transmitting contact, and mechanical means operating didectly on said selecting elements for actuating said contact in accordance with the setting of said code bars.

5. In combination, a series of selecting elements, a selectable element individual to each of said selecting elements, means for positioning said selecting elements in predetermined combinations, a single transmitting contact, a distributor normally tending to rotate, and means operated directly and immediately upon the operation of any one of said selecting elements for permitting the rotation ofsaid distributor whereby said contact is actuatedin accordance with the setting of said selecting elements.

' 6. In combination, a series of selecting elements, a selectable member individual to each of said selecting elements, means for positioning said selecting elements in predetermined combinations for conditioning said members for operation, a single transmitting contact, a distributing mechanism cooperating with said members for causing the operation of said transmitting contact in accordance with the setting of said selecting elements, and means operated directly and simultaneously with the operation of said selecting elements for permitting the rotation of said distributing mechanism.

7 In combination, a series of selecting elements, a selectable member individual to each of said selecting elements, means for positioning said selecting elements in predetermined combinations to condition said selectable members for operation, a single.

transmitting contact, a distributing mechanism comprising a series of cams normally tending to rotate,'said cams enga 'ng the selected ones of said selectable mem ers for causing the operation of said transmitting contact in accordance with the setting of said selecting elements, a mechanical stop for preventing the rotation of said cams,

and means operated simultaneously with the operation of said, selecting elements for moving said stop to release said cams for rotation. v 8. A telegraph transmitter comprisin a series of key levers, a plurality of selecting elements operated in various combinations inaccordance with the depression of said key levers, a transmitting contact, means individual to each of said selecting elements for controlling the actuation of said contact, a mechanical distributor normally tendin to rotate cooperating with said individua means for efiecting the operation of said contact, means common to saidkey levers and operated upon the depression of any one thereof, and means .operated directly and simultaneously with the operation of said common means for releasing said mechanical distributor.

9. A telegraph transmitter comprising a series of key levers, a plurality of selecting elements operated by' said-key levers, a transmitting contact, an all-mechanical distributing mechanism for actuating said con tact in accordance with the setting of said selecting elements, and means controlled by the depression of anyone of said key levers for preventing the continued operation of said distributing mechanism should a key lever be depressed for a period longer than the normal cycle of operation of said distributing mechanism.

10. In combination, a series of selecting elements, a selectable element individual to each of said selecting elements, means for positioning said selecting elements in predetermined combinations, a single transmitting contact, a distributor, a'stop arm associated With said distributor for normally preventing the rotation thereof, and

anall-mechanical means operated simultaneously with said selecting elements for freeing immediately said stop arm for rotation whereby saidcontact is actuated by said distributor in accordance with the setting of said selecting elements.

11. A transmitter for start-stop printing telegraph systems having a rotatable contact actuating member to "transmit a start impulse followed by a predetermined num-. her of selecting impulses comprising a plurality of key levers, a series of selecting bars selectable in accordance with the operation of said key levers and operated directly by said rotatable contact-actuating memberfor effecting the transmission of the selecting 12. A transmitterlfor startsstop printing telegraph systems comprising an intermittently rotating shaft, a plurality of actuating members disposed about said shaft at different angular positions, a plurality of key levers, a series of selecting bars movable in accordance with the operation of 'said key levers, impulse transmitting means operated by said actuating members in accordance with the setting ofsaid selecting bars, and means effective should a key lever be held operated for a. period longer than the time required to transmit apredetermined number of impulses for preventing the rotation of said shaft and said actuating members.

In witness whereof, I hereunto subscribe my name this 10th day of November A. D, 1921.

r HARRY PFANNENSTlEHL.