US1865704A - Mechanical movement - Google Patents

Description

July 5, 1932. G. v. PEcK MECHANICAL MOVEMENT Filed April 5, 1929 2 Sheets-Sheet 1 July 5, 1932. v v, c 1,865,704

MECHANICAL MOVEMENT Filed April 3, 1929 2 Sheets-Sheet 2 awwentoz GORDON M PEG/f gg lmflm m y a mechanical movement Fatented July 5, 1932 wrap STATES.

PATENT OFFICE GORDON V. BECK OF BLOOMFIELD, NEW JERSEY MECHANICAL MOVEMENT Application filed, April 3, 1929. Serial No. 352,066.

the rotatable element in the interest of exact A adjustment and without the requirement of manual skill.

Still another object of the invention is the turning of the rotatable element in either direction through any angle up to 180 by means of a single mechanical movement.

It is also an object of the invention to lock the rotatable element in adjusted position against turning in either direction by means of the mechanical movement.

The invention further seeks to utilize the mechanical movement in the adjustment of one or more tuning elements or condensers, mounted upon a common shaft, such as are found in radio receivers, as in the tuning of the receiver and thus to efi'ect automatic tuning.

It is still another object of the invention to efl'ect remote control of the tuning of a radio receiver as conveniently and with the same degree of accuracy as can be attained by a skilled radio operator directly manipulating the dials.

These and other objects of the invention and the means for their attainment will be more apparent from the following detailed description, taken in connection with the accompanying drawings, illustrating various embodiments by which the invention may be realized and in which:

Figure 1 is a View, in plan, showing the application of the mechanical movement to a shaft common to a plurality of condensers in a radio receiver to effect automatic tuning; the actuation of the individual mechanical movements being efi'ected through the instrumentality of keys.

Figure 2 is a view showing a wiring diagram and auxiliary parts by which the me chanical movements may be electrically actuated and particularly by remote control.

Figure 3 is a view, in side elevation, showing the mechanical movement in what may be considered initial position, the key for manual operation not being depressed.

Figure 4 is a side'elevational view similar to Figure 3, but showing the key partly depressed.

Figure 5 is .a view similar to Figures 3 and. 4, but showing the key wholly depressed and themovement in equilibrium.

Figure 6 is an end view of the movement taken in the plane indicated by the line 6-6 of Figure 5 and looking in the direction of the arrows.

Figure 7 is an enlarged fragmentaryview showing the resilient means normally tending to straighten pairs of the levers of the movement.

Referring first to Figures 3 to 7 for an understanding of the mechanical movement and its operation, a shaft is indicated at 10, the rotation of which is desired through an predetermined angle. Mounted on the she. 10 is a disk 11. Pivotally connected to the disk 11 and. preferably upon opposite sides thereof, respectively, are links 12 and 13.

These links 12 and 13 are shown as pivotally 3 connected, as at 14: and 15, to the disk'll at equal radial distances from the shaft 10 and the pivots 14 and 15 are spaced throu h an angular distance of about 120. Linis 12 and 13 are equal in length and are pivotally connected at their lower ends, as at 16 and 17, to a pair of somewhat longer links 18 and 19, the lower ends of which are connected to a common pivot 20. Each pair of links 12, 18 and 13, 19 may be considered as a toggle and the links of each toggle are given a tendency to lie in the same straight line by a resilient member 22 coiled at its midpoint about the pivot 20 and turned inwardly at its ends 23 to engage outer edges of the links 18 and 19 respectively as shown particularly in Figure 7 and, by a scissors action, tend to reduce the angle between the links 18 and 19.

For an understanding of the operation. of 1m the device in rotating the shaft, attention is first directed to Figure 3 in which it may be assumed that the shaft 10 has been rotated in counterclockwise direction, as viewed in that figure, until the link 13 has been moved to a substantially horizontal position, as shown, resting upon the shaft 10, the toggle 12, 18 being also bent (broken). When it is desired to rotate the shaft 10 in a clockwise direction, the pivot 20 is moved downwardly causing the right hand end (at 17 of the link 13 to be drawn downwardly by the link 19. Link 13 rests upon shaft 10 as a fulcrum and thus acts as a lever so that when the right hand end (at 17) is drawn downwardly ment continues until the pivot 20 reaches the position shown in Figure 5 at which time the links 12, 18 have been carried past the lower dead center and upwardly in a clockwise direction through approximately 60 from the vertical until the two straightened toggles assume identical positions upon opposite sides of the medium plane of the shaft 10. The tendency of the toggle 12, 18 to straighton is aided by the spring 22 as will be understood. At this time any further downward movement of the pivot 20 tending to draw downwardly the toggle 13, 19 and rotate the disk 11 in a clockwise direction is resisted by the similar downward movement of the toggle 12, 18 tending to move the disk 11 in a counterclockwise direction and thus the disk and shaft are locked in the desired position and are incapable of movement out of that position even to the extent of a fraction of a degree.

In order to effect a positioning of the shaft at any desired angle, adjustment of the disk 11 wlth respect to the shaft 10 is permitted b mounting the disk 11 for free rotation tliereon, the disk 11 being locked to the shaft at any desired position of adjustment by means of a setscrew 25.

It will be noted that when the links 12, 18 assume the position shown in Figure 4 as the disk 11 rotates in the direction of the arrow that means are provided to throw the toggle joint 17 over to the other side of the vertical medium plane of the shaft 10. In the illustrated embodiment, the spring 22 or other resilient means is provided.

Obviously rotation of the shaft in a counter clockwise direction is effected in the same manner. In this instance, the toggle 12, 18

weaves is utilized and will assume a position similar but the reverse of that shown in Figure 3, the link 12 resting on the shaft 10 as a fulcrum.

Various expedients may be adapted to cause the downward movement of the pivot 20. In Figure 2 the pivot 20- is carried on the armature 30 of the solenoid coil 31 so that, when the solenoid is energized and the armature 30 drawn therein the pivot 20 is pulled downwardly, effecting the actions heretofore described. In Figures 3, 4 and 5 manually operable, devices are shown. The pivot 20 is carried on the .extremity of an arm the other end of which is loosely pivoted on a fixed shaft or pivot 41. Also carried upon the pivot or shaft 41, if desired, is a key 50 which extends between the links 18 and 19 and rests upon the ivot 20. Wlfen key 50 is pressed, it turns a out the pivot 41 and obviously carries down with it the pivot 20. As illustrated the key 50 is manually maintained in its uppermost position by resilient means shown as the coil spring 42.

The mechanical movement heretofore described is applicable in any situation where a rotatable element is to be turned. For instance it is ideally adapted to tuning a radio receiver or transmitter, rotating advertising machines, train station announcers, etc. In Figure 1 it is shown applied to a radio receiver. Rotatably supported in hearings in standards or frame members 45 is the rotatable shaft 10 shown as carrying four adjustable condensers 46 and the usual graduated dial 47 for hand tuning. The condensers 46 may be counterbalanced as at 48. On the common condenser shaft 10 are mounted a plurality of the mechanical movements heretofore described, each disc 11 of which is adapted to be adjustably mounted on the shaft 10 so that when the pivot 20 of that movement is depressed by the key 50 the shaft will be rotated through the requisite angle to bring the condensers 46 into proper position to tune in the station desired.

It may be assumed that the key marked W N Y C is depressed then tuning the radio receiver for the reception of the waves of station W N Y C. This depression of the key W N Y C causes the mechanical movement operated thereby to assume the position shown in Figure 5 while the remaining mechanical movements will be caused to assume various intermediate positions, for instance as shown in Figures 3 and 4. To tune in another station say K D K A, the key marked K D K A is depressed, the mechanical movement of which may be assumed to be in the position shown appearance sake the keys are all normallycal circuit including also a switch 60, so that when the circuit is completed by closing the switch, the solenoid is energized and operates as hereinbeforedescribed. There being one circuit for each mechanical movement, there is thus one switch for each station to be automatically tuned in and the desired station may be received by selection operation of the switches.

For remote control, the circuits may be connected with contacts in a coupling mem ber 62 to which a series of contacts or switches in a switch block 63 may be connected as by a cable 64 so that tuning may be effected from any point in the room.

Various adaptations of the mechanical movement of this invention will occur to those skilled in the art as well as changes in the configuration of the component elements thereof and no limitation is intended by the phraseology of the foregoing specification or illustrations in the accompanying drawings exce t as indicated in the appended claims.

%Vhat I claim is:

1. 1m a tuning device for a radio receiver,

the combination, with a shaft adapted to.

move at least one tuning element, of a link connected to the shaft in spaced relation thereto; a link pivotally connected to the first named link, and means to pull the second named link away from the shaft.

2. In a mechanical movement, the combination with a shaft, of links connected to the shaft in spaced relation and at equal distance from the axis of the shaft, links connected, respectively, to the first named links, the last named links being connected together, and means to move the last named links away from the shaft.

3. In a mechanical movement, the combination with a shaft, of links pivotally connected at one end, respectively, to the shaft in spaced relation and at equal distance therefrom, links pivotally connected, respectively, to the other ends of the first named links, the last named links being pivotally connected at their other ends, and means to move the last named pivoted connection.

4. In a mechanical movement, the combination with a shaft of a member carried by the shaft, links pivotally connected at one end to the member in spaced relation and at equal distances from the axis of the shaft, links pivotally connected, respectively, to the other ends of the first named links, said last named links being pivotally connected at their other ends, and means to move the last named pivotal connection.

5. In a mechanical movefnent,-the combination with a shaft of a member adjustably carried by the shaft, links pivotally connected at one end to the member in aced relation and at equal distance from t e axis of the shaft, links pivotall connected, re actively, to the other ends 0 the first name links, a lever to one end of which the last named links are pivotally connected at their other ends, and means to move the last named pivotal connection.

6. In a mechanical movement, the combination with a shaft, of a member carried by the shaft, links pivotally connected at one end to the member in spaced relation and at equal distance from the axis of the shaft, links pivotally connected, respectively, to the other end of the first named links, a statlonary pivot, an arm thereon to the end of which the lastnamed links are pivotally connected at their other ends, and .means to rotate the arm about the pivot.

7. In a mechanical movement, the combination with a shaft, of a disc, means to secure the disc to the shaft, links pivotally connected at one end to the disc in spaced relation and at equal distance from the axis of the shaft, links pivotally connected, respectively, to the other ends of the first named links, a lever to one end of which the last named links are pivotally connected at their other ends, a stationary pivot to which the lever is pivotally connected at its other end, and a second lever also pivotally mounted at one end to the second named shaft and extending between the respective last named links.

8 In a mechanical movement, the combinatlon with a shaft, of a disc, means to ad ustably secure the disc to the shaft, links pivotally connected at one end to the disc in spaced relation and at equal distance from the axis of the shaft, links pivotally connected, respectively, to the other end of the first named links, a lever to one end of which the last named links are pivotally connected at their other ends, a stationary pivot to which the lever is pivotally mounted at its other end, a second lever also pivotally mounted at one end to the stationary pivot and extending between the respective last named links, and yielding means engaging the last named links.

9. In a. mechanical movement, the combination with a shaft, of a disc, means to adjnstahly secure the disc to the shaft, links pivotally connected at one end to the disc in spaced relation and at equal distance from the axis of the shaft, links pivotally con nected, respectively, to the other end of the first named links, a lever to one end of which the last named links are pivotally connected at their other ends, a relatively stationary pivot to which the lever is pivotally mounted at its other end, a second lever also pivotally keys,

mounted at one end to the stationary pivot and extending between the respective. last named links, spring means to move the last namedlever toward the first shaft and spring means engaging the last named links.

10. A mechanical movement, in combination within rotatable element, a pair of toggles pivotally connected to each other at one end and connected, respectively, to said rotatable element at a distance from its axis and means to straighten the toggles.

11. A mechanical movement, in combination with a rotatable element, a pair of toggles pivotally connected to each other at one end and connected, respectively, in spaced relation to said rotatable element at a distance from its axis and means to utilize the respective toggles to turn the element in opposite directions.

12. In a tuning device for a radio receiver, the combination with a shaft adapted to move at least one tuning element, of a plurality of pivoted keys and operable connections, re spectively, between the keys and the shaft to rotate the shaft through a predetermined ang 13. In a tuning device for a radio receiver, the combination with a shaft adapted to move at least one tuning element, of a plurality of pivoted keys, members carried with the shaft and operable connections respectively between the keys and the members to rotate the shaft through a predetermined angle.

14. In a tuning device for a radio receiver, the combination with a shaft adapted to move at least one tuning element, of a plurality of disks carried with the shaft and toggles pivotally secured to each disk and movable by means of the keys, respectively, to rotate the shaft through a predetermined angle.

15, In a tuning device for a radio receiver, the combination with a shaft adapted to move at least one tuning element, of a plurality of keys, disks carried with the shaft, a pair of links pivotally secured to each disk, links pivotally secured to the first named links, respectively, means to connect the last named links and engageable by the keys, respectively, to rotate the shaft through a predetermined angle.

16. In a tuning device for a radio receiver, the combination with a shaft adapted to move at least one tuning element, of a plurality of keys, disks carried with each shaft, a pair of links pivotally secured to the disk, links pivotally secured to the first named links, respectively, means to connect the last named links and engageable by the keys, respectively, to rotate the shaft through a predetermined angle and yielding means to return the keys to initial position.

17. In a tuning device for radioreceivers, the combination with a shaft adapted to move at least one tuning element, of a plurality of disks, means to adjustably secure the disks to at their other ends, respectively, a stationary I .pivot to which'the levers are pivotally connected at their'other ends, key levers also pivotally mounted at one end to the stationary pivot and extending between the respective last named airs of links, yielding means engagin the ast named links and tending to straig ten them and yielding means to return the key levers to initial position.

18. In a mechanical movement, the combination with a shaft, of links connected to the shaft in spaced relation and at equal distance from the axis of the shaft, radii from the axis of said shaft which pass through the points of connection of the links defining an angle of less than 180, links connected, respectively, to the first named links, the last named links being connected together upon the opposite side of the center of the shaft from the connections therewith of the first named links, and means to move the last named links away from the shaft.

19. In a mechanical movement, the combination with a shaft, of a member carried by the shaft, links pivotally connected at one end to the member in spaced relation and at equal distances from the axis of the shaft, links pivotally connected, respectively, to the other ends of the first named links, said last named links being connected with provision for pivotal movement at theirgother ends and a lever adapted to move said last named connection away from the shaft.

20. In a mechanical movement, the combination with a shaft, of a member carried by the shaft, links pivotally connected at one end to the member in spaced relation and at equal distancesf rom the axis of the shaft, links pivotally connected, respectively, to the other ends of the first named links, said last named links being connected with provision for pivotal movement at their other ends, a lever adapted to move said last named connection away from the shaft and resilient means to return the lever to initial position.

a 21. In a tuning device for a radio receiver, the combination with a shaft adapted to move at least one tuning element, of a plurality of keys, disks carried with the shaft, a pair of links pivotally secured to each disk, links pivotally secured to the first named links, respectively, means to connect the last named links, means whereby the keys move the last named means away from the shaft, respectively, to rotate the shaft through a predetermined angle.

22. In a device of the character described, in combination with a rotatable element, of

movement being so related that in at least one, extreme position the rotatable element is locked against rotation.

In testimony whereof I afiix In signature.

GORDON PECK.

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