US1938143A - Intermittently operating electrical device - Google Patents

Description

: Dec. 5, 1933. c. 1.. HANEL INTERMITTENTLY OPERATING ELECTRICAL DEVICE 2 Sheets-Sheet 1 Filed Feb. 1, 19-30 Dec. 5, 1933. c. L. HANEL INTERMITTENTLY OPERATING ELECTRICAL DEVICE Filed Feb. 1, 1930 2 Sheets-Sheet 2 Patented Dec. 5, 1933 UNITED STATES INTERMITTENTLY OPERATING ELECTRI-V CAL DEVICE Charles Ludwig Hanel, Jackson Heights, N. Y., assignor to Signal Engineering & Manufacturing Company, New York,'N. Y.', a corpora tion of Massachusetts Application February 1, 1930. Serial No. 425,327

3 Claims.

The present invention relates to an electrical device that will operate intermittently as long as it is energized with predetermined intervals between successive operations thereof, such a device being particularly adapted for. sounding signals of various types. I

The device of the present invention is particularly characterized by the fact that the intermittent operation thereof is brought about without the use of any electrical contact making devices, the. device continuing its intermittent operation so long as it is energized with no interruptions in the flowv of current to its energizing winding. Furthermore, the device is characterized by the fact that it is capable of ready adjustment so as to vary thelength of the intervals between successive operations thereof. The above and other advantageous features will hereinafter more fully appear with reference to the accompanying drawings in device. i

Fig. 2 is a vertical sectional view along the line 2--2 of Fig. 1, looking in the direction of the arrows.

Fig. .3 is a horizontal sectional view alongthe line 33 of Fig. 4, looking in the direction of the arrows. I i I Fig; 4 is a sectional view along the line 2-2 of Fig. 1 illustrating the parts of the device in different positions. v

Fig. 5 is a sectional view similar to Fig. 4, further illustrating theroperation of the device. Fig. 6 is a fragmentary sectional view along the line 66 of Fig. 2. r

Fig. 7 is a diagrammatic a'modification of the device.

Like reference characters refer in the different figures. I

Referring first to Figs. 1 and 2, the device comprises a casing-1 inclosing and supporting a magnetic core 2 generally O-shaped inform, with an air gap at 3 in one leg 2a thereof.

view illustrating to like parts 7 5 The longer portion of the leg 2a beyond the air gap,3 is surrounded by a winding 4 so that when the winding 4 is. energized from any suitable; source of alternating current, a. pulsating magnetic field will be set up across the air gap 3. V A shaft 5 is'rotatably supported in bearings 6 provided by opposed faces of the casing 1 and I this shaft 5 carries a thin disk 7 of magnetic material. As best shown in Fig. 3, the axis 155 of 'the'shaft 5 is parallel to the axis of the core Fig. 1, rotation of the shaft 5 will cause the current source. Obviously the rotation of the shaft 5 will continue solong as the winding 5 remains energized, and the manner in which the rotation of the shaft 5 can be utilized to automatically cause the intermittent operation of the devicewill next'be described.

' As an illustrative embodiment of ,the invention,the casing 1 is shown mounted on a metallic gong 8, the periphery of which is adapted to be engaged byga striker 9 to sound the. gong 8. The striker 9 1s carried by a U-shaped frame 10, the spaced parallel. sides of which extend upwardly on either side of the, shaft, 5 and are, pivotally connected to arms 11 turn able' on pivots 12 provided by the sides of the casing 1. Two pairs of arms 11 are. utilized for supporting the striker frame 10, sothat the striker 9 will always remain in a substantially vertical position when the frame 10. is raised or lowered by pivotal movement of the arms 10. 8 As'best shown in Figs. land 4,.the.rotative movement of the shaft 5is adapted to betranslatedinto rectilinear movement of the striker frame 10 by means of a pin 13 carried at'the free endv of a'lever 14pivotally mounted between the lower pair of arms 11. vThe pin 13 .is adapted to fit .in a spiral groove 15 formed'on a sleeve 16 rotatable with the shaft 5, so that with the pin 13 engagedin the groove 15, as shown in whereuporrthearms 11 being unsupportedthe frame 10- drops quickly to cause "the striker- 9 to hit the gong 8 a sharpblow.

The position of the striker 9 at the moment of hitting the gong 8 is shown in Fig. 5, and 19 as the frame 10 reaches the lower end of its stroke, the tail 1'? of the lever 14 engages a second stationary stop 193Whi0h[ serves to turn the lever 14 in a counterclockwise direction to reengage the pin 13 with the spiral groove 15. Inasmuch as the weight of the frame 10 and striker 9 causes the tail 1'7 to strike the stop 19 with considerable force, on the down stroke of the frame 10, the stop 19 is preferably supported by a resilient'finger 20 bent around the shaft 5, as shown in Fig. 6, and secured to the casing 1 by screws 21 at a considerable distance from the stop 19. Consequently, the stop 19 is adapted to yield when struck by the 'tail17, so that engagementwith the stop 19 exerts no damping effect on the stroke of the gong.

As previously pointed out, continued energiza v tion of the winding 4 causes continuous rotation of the disk 7 so that as soon as-the pin 13v strokes of the gong and with a predetermined speed of the shaft, this period is susceptible of wide variation by altering the position of the upper stop 18. To this end, the stop 18 is supported by a bracket 22 which, as best shown in Figs. 1- and 6, extends upwardly parallel to the shaft 5 inside of the frame 10. The bracket 22 provides a slot 23 in which the stop 18 is slidable and is adapted to be clamped in different 40 positions by means of screws 24 cooperating with washers 25. Thus the stop can be raised and lowered readily so as to very closely control the length of the upward travel of the frame 10. In this manner the interval between successive strokes of the gong 8 can be varied within a wide range and with great accuracy.

While-the vertical movable frame 10 is show as carrying astriker 9 to cooperate with the gong 8, as {one illustrative embodiment of the invention, obviously the intermittent up and down movement of the frame 10 can be utilized for other purposes without departing from the present invention. For example, as illustrated diagrammatically in Fig. 7, the frame 10 may be employed to bridge the-gap between spaced contacts-26 at the end of each stroke, so as to energize a series of suitable visual or audible signals, indicated at 27, from a suitable source 'of electrical energy, indicated at 28. Furthermore, the closing of the. circuit between the contacts 26 could also be employed in conjunction with sounding of the-gong ,3 by the striker v 9 so as to set in operation other electrically controlled devices in circuit'with the contacts 26,

sounding of the gong =8 being depended upon trical device which will continue to operate au-' tomatically as long as it is energized withoutmember of the gong type,a frame centrally supported within the concave side of the gong, an induction motor of the disk rotor type mounted a vertical portion of said frame, a vertical shaft for saidmotor providing a spiral groove, a yoke fembracing said motor and providing arms extending in parallel relation on opposite sides of said motor shaft, a gong hammer extending parallel to said motor shaft, means for pivotally securing theends of said yoke arms to said frame and to said hammer respectively, a pawl pivotally mounted between said yoke arms, means for causing said pawl to engage the motor shaft groove so that said hammer will be raised upon rotation of the motor, and means for disengaging the pawl from said groove at a predetermined point in the upward movement of the pawl and hammer so that said hammer willzfall to strike the gong.

2. In an electrical signal device, a resonant member of the gong type, a frame centrally sup-. ported within the concave side of the gong, an

induction motor of the disk rotor type mounted in said frame with its magnetic core secured to avertical portion of said frame, a, vertical shaft for said motor providing a spiral groove, a yoke embracing said motor and providing arms extending in parallel relation on opposite sides of said motor shaft, means for pivotally securing the'ends of said yoke arms to said frame and to said hammer respectively, mounted between said yoke arms, means operable when said yoke supports said hammer with its end adjacent to saidgong for engaging said pawl insaid shaft groove so that the hammer 1 will .be raised upon rotation of the motor, and means for disengaging the pawl from said groove at a predetermined point in the upward movement of-the pawl so that the hammer will fall in said frame with its magnetic core secured a pawl pivotally.

in said frame with its magnetic core secured to to a vertical portion ofsaid frame, acvertic al V shaft for said motor providing .a spiral groove, a yoke embracing said motor and'providing arms extending in a parallel relation on opposite sides of said motor shaft, a gong hammer extending parallel to said motor shaft, means for pivotally securing the ends of said yoke arms to said frame and to said hammer respectively, a pawl pivotally mounted between said yoke arms, means operable when said yoke supports said hammer with its end adjacent to said gong for engaging said pawl in said shaft groove so that the hammer will be raised uponrotationof the motor, and means for disengaging thepawl from saidgroove at a predetermined point in the upward movement of the pawl so that the hammer will fall by gravity to strike said gong, said pawl disengaging means being vertically adjustable so as to control the distance through which said hammer falls.

CHARLES LUDWIG HANEL.

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