US1301968A - Spring-motor control. - Google Patents

Description

LSULQS.

N. PEDERSEN.

SPRING IVIOTR CONTROL. APPLICATION FILED JANA I5. i918. RENEVIED IAN. 7,1919.

Patented Apr. 29, 1919.

3, SHEETS-SHEET I.

N. PEDERSEN.

SPRING MOTOR CONTROL.

APPLICATION FILED IAIIv I5, IsalaA III-:NEWED IAN. 1,1919.

Patented Apr. 29, 1919.

3 SHEETS-SHEET 2.

LISOLQRI,

gw/M N. FEDEHSEN.

SPRING MOTOR CONTROL.

APPLICATION FILED IAII4 I5. I9Is. IIEIIEWED IAN. I. Isls.

Patented Apr. 29, 1919.

3 SHEETS-SHEET 79.

"" lil, EN', 0F IPHILELPHI, PENNSYLVNIA, ASSJIGNUF, T0 ARTHUR BROEK,

., @1E1 PHIILDELPHM, PENNSYLVANIA.

' veras-tranen contact..

nennen.

Patented dpr. 259, 1919.,

Original application med @etober 10, 1916, Ferial Ito. M4370. Divided and thin application filed January la;

191e, Ferial Ito. 211mm, Renewed January 7, w19. Serial No. 270,093.

To all Awhom t may concern.' Be it known that l[,N1nns Fantasmi, a citlzen of the United States of America, and a resident of the city 4and county o f Philadelphia, in the State of Pennsylvania, have 1nvented a certain new and useful Improyement in Spring-Motor Controls, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part thereof.

rlihe general object of my present invention is to provide improved speed regulatlng means for a spring motor.

More specifically one object of my invention is to provide an eective speed regulating mechanism proper which by reason of its sensitiveness, re ialbility, form, and weight. 1s especially adapted for use as a part of the actuating mechanism of an automatic spring motor actuated camera suspended from, or otherwise flexibly mounted upon, an aeroplane or other air craft, but my improved speed regulating-.mechanism proper is not restricted to this articular use.

The various eatures of novelty which characterize my' invention are pointed out with particularity in the claims annexed to and forming a part of this specification. For a better understanding of the invention, however, and the advantages possessed by it, reference should be had to the accompanying drawings and descriptive matter in which have illustrated and described preferred embodiments of my invention.

0f the drawings:

Figure 1 is an elevation of a portion of an aeroplane on'which Ais mounted a spring motor driven camera .provided with a form of my control mechanism preferred for such use.

Fig. 2 is a partial sectional plan of the camera.

Fig. 3 is 'a side elevationof a portion of the apparatus shown in Fig. 2.

'Fi 4 is an elevation of a manually adjusta le controller.. l

Fig. 5 is a section on the line 5 5 of Fig. 4.

Fig. 6 is a view taken similarly to Fig. 3 showmg a modiiicatiom universal coupling comprising gimbal frames C and D. rlFhis permits the camera to maintain to a substantial extent a fixed vertical axis notwithstandi g pitching and rolling movements which the air craft may experience.

lt is unnecessary for an understanding of the present invention to describe the camera mechanism inclosed within the camera hous` ing further than tofsay that it comprises a main actuating spring motor E, a portion of which is shown in Fig. 2, and that the speed of operation of the main motor is directly controlled by a second auxiliary spring motor F or timing mechanism by means of which the cam wheels F mounted un the spring barrel F2 of the auxiliary mo* tor are the only parts illustrated. A camera mechanism of this type is disclosed in detail in the application, Serial No. 118,957, filed jointly by L. J. R. Holst and myself on September 8, 1916.

The timing mechanism'or auxiliary motor F has its spring barrel F2 journaled on the winding shaft F3. The spiral driving spring F4 of the auxiliary motor F has its inner end secured to the shaft F3 and its outer end'securedI t0 the spring barrel F2 in which the spring is inclosed. The spring barrel F2 has secured to it a spur gear F which is coaxial with the shaft F8 and in mesh with a small gear F7 secured to the shaft of an escapement disk or wheel F8. Coperating with the escapement wheel Fs is an escapement anchor F2 carried by a rock shaft F10 to which is also secured a lever F11 forming one of the elements of a compound pendulum. The leverelement F11 is vconnected at its lower end to the second element F12 of the compound ndulum by a pin and slot connection whidlixd as shown, comprises a in F10 'carried by the pendulum e'ement 11 working in a radial slot formed 1n one side of the pendulum element F11. The pendulum element F12 comprises a body portlonfm the form of a disk or liy wheel, .whlch has a supporting shaft F10 journaled 1n the two forks of the bifurcated end of a lever F10. The latter is supported by a shaft F1T .1eurnaled in the frame work of the aux1 lary motor.

In the particular construction disclosed the winding shaft Fa carries a gear F10 1n mesh with'the gear E10 forming a art of the main motor E with the' resultt at the sprin F4 of the auxiliary motor 1s normally woun up b the main motor as fast as 1t unwinds an thereby through the cams F permits of a corresponding movement of the main motor. The initial tension of the auxiliary motor spring F* may be adjusted b means of the external knob F10 on the sha F0 and the pawl and ratchet connection between the shaft F0 and the ear F20 formed by the pawl F11 secured to t e gear F10 and the ratchet wheel F22 secured to the shaft F0.

The combination with a main motor of an auxiliary sprin controlling motor having its driving sprmg kept under tension by the mainV motor, while novel with me forms no part of the present invention but is disclosed and claimed in -my prior application, Serial No. 95,890, filed May 6, 1916.

1 The lever F10 is angularly adjusted to thereby vary the frequency of vibration of the compound pendulum controlling the s eed of the motor 'F by means of a cam I, t e shaft I4 of which is journaled in the frame work of the motor F. The cam I bears at its edges against a roll F1s journaled in the adjacent end of the lever F10. The roll F11 is held against the periphery of the cam I by a spring F11. Secured `to the cam I and coaxial therewith is a gear wheel I in mesh with a worm I1 which is journ'aled in the frame work of the motor F and the stem or shaft of which is connected by the coupling 'I0 to a shaft section I projecting through and journaled in the housin of the camera B.

he shaft I0 is connected to the operating shaft G11 of a manually actuated adjusting mechanism G mounted on the dashboard in front of the observers seat A2 or on any other convenient controller stand by a iexible transmission H which, in the form n shown, comprises a plurality of shaft sections and gi-mbal joints H connecting the sections to one another, and connecting the ends of this liexible connection to the shaft I: and G11 respectively. Conveniently one of the sections of the shaft H may comprise a length adjusting sleeve H2 as shown.

The adjustin mechanism G comprises an operating arm 1 carried bg a shaft Grl5 and swee in overa fixed dial which is provided adjacent its periphe with holes G into one or another of' w ich is inserted the stem of an operating button G1 carried by the arm G1 and serving, when entered in.

any one of the holes G1, to 'secure the arm G1 in the corresponding adjustment. The shaft G0 is connected to the shaft G11 with which it is in coaxial alinement by speed 1ncreasin gearin includin alarge spur gear G0 carried by t e shaft 5, a small spur G' in mesh with the gear G0 and secured to the countershaft G0, and a large spur gear G0 secured to the countershaft G and 1n mesh with a small spur gear G10 which is secured to the end of the shaft G11.

With the particular mechanism described, one complete rotation of the arm Gr2 serves to give the cam I one complete turn, though as shown, less than one turn of thecam imparts the full throw to the lever F10. At the same time, the screw and worm connection `rovided between the shaft Iv5 and the cam prevents any possibility of the adjustment of the cam I by the pressure exerted against it by the roll F11.

As the cam I is rotated and the pin F11 of the pendulum element F11 is thus moved in the slot F1* toward and away from the amplitude of the angular movement of the pendulum element F12 necessa to accommodate the escapement releasing angular movement of the pendulum element F11 increases and diminishes. The frequency of vibration of the endulum as a whole is increased and dimlnished by decreasing and increasing, respectively, the amplitude of the angu ar movement of the pendulum element F11. A spring F30 carried by the frame work of the motor F is arranged to engage the periphery of the pendulum element F12 and arrest the motion of the latter and thereby stop the motor F as .the high polnt of the cam I is moved into engagement with the-lever F10.

The mechanism described rmits of a L very sensitive, accurate and re ia-ble control ofthe camera mechanism without subject the camera housing to torques objectiona troller stand and the camera formed bythe s jointed shaft H does not at any time ap reciably interfere with the necessary free om of movement of the camera relative to the supporting air craft frame work.

naoneee a inmesh with a worm F11 the lower end of secured td the shaft F81 and a' section FSK which rests in a step bearing carried by a' bracket F22 formin a art of theframe work of the motor "Bhe shaft F11 .carries a fan blade comprising a section F12 axially adjustable on the shaft F81 and telescoping with the section F82. The fan section F84 -comprises a hub portion F8 .which rests on the curved upper ed es of the forks of a bifurcated lever F160 which is supported and angular-ly adjusted just as is the lever F16 of the construction first described, andv which diers from the, lever F11. only in the shape of a portion ofthe lever engaging vthe hub portion Fsof the fan section F121.

With theapparatusshown in Figs. 6 and 7 the eect of the angular adjustment ofthe lever F16 is to increase or diminish the eiiectivelength of the fan and thereby to increase -or diminish the retarding eect and `thus Ato reduce or increase the speed of the motor FA. .i ln the forml of s eed controlling mechanism illustrated in ig. 8, the spring motor FB proper is essentially the same as the motor F shown in Figs. 2 and 3 except in the form of the com-pound element employed. ln Fig. 8 the pendulumA element F11 secured to the escapement anchor shaft may be substantially identical with the element F11 of'Figs. 1, 2 and 3. rlhe coperating pendulum F12D in this form has its supporting shaft F121 directly journaled in the frame work of the motor FB. The pendulum element F12o comprises diametrically opposed arms on which are mounted adjustable weights F122, and comprises horns F128 between which is located a device F124 employed to directly limit the permitted range of angular movement of the pendulum element F121. As shown, the element F124 is carried by a shaft F125 which also carries a worm gear F12 in'mesh with a worm F121. The shaft F128 carrying the worm F12 extends through thecamerahousing BB or other casing inclosing the motor FB, and is connected by the coupling F129 to some suitable adjusting mechanism by a flexible shaft HA.

In the operation of this form of my in vention the shaft F128 is adjusted to move` the member F124 between the full and dotted line positions shown. When the member F124 is in the full line position the pendulum element F120 is positively held against oscillation and the operation of the motor FB is lating v t disclosed, but not claimedherein, is claimed element thereby arrested. When the member F12? is in the dotted line position the motion of the pendulum element F12o is unrestrained and the motor FB operates at minimum speed. ln intermediate positions of the member F121* the throw of the pendulum element F12o `is restricted with the result that the Speed of the motor FB is cut down more or less accordin ly 4as the throw of the pendulum element- 12 is restricted less or more. The novel combination with an automatic spring motor actuated camera adjustabl mounted on an aeroplane of an indepen' tti ently suplported control mechanism for regue operation of the camera motor 1n my prior application Serial No. 124,770,

:filed 0ct.l0, 1916,0f which the present application is. a division.

While in accordance with the revisions of thestatutes l have illustrate and ,described. the best forms of my invention now mown to me, it will be apparent to those skilled in the art that changes can be made in the form of the apparatus disclosed with'- out departing from the spirit of my invention, and that some features of my invention may sometimes be used with advantage without a corresponding use ofv other features.

Having now described my invention, what l claim as new and desire to secure by Letters Patent, is

l. In combination a spring v.moftor pro vided with an escapement release'and a controlling pendulum therefor comprising two oscillating parts pivotally connected to one another and oscillating about separate axes, and means for varying the distance between said axes.` 2. 'llhe combination in a spring motor provided withA an escapement release, of a controlling pendulum therefor comprising two parts oscillating s nchronously about separate axes, one of sai axes beingl stationary and an adjustable'element on which the other element is journaled. v

3. The combination in a spring motor rovided with an escapement release includlng an oscillating anchor, a pendulum element oscillating about an axis laterally displaced from the axis of said anchor and connected to said anchor to oscillate in synchro i nism therewith, and means for varying the vibration frequency of said element.

4. The combination in a' spring motor provided with an escapement release including .an oscillating anchor,

displaced from the axis of said anchor and connected to' said anchor to oscillate in synchronism therewith, and means for varying the amplitude of vibration of said'pendulum element to thereby vary its vibration frequency.

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of a pendulum oscillating about an axis laterally 5. The combination in a spring motor of a driving spring, a speed regulating element geared to and moved by said spring, a lever or adjusting said element to different posi- 5 tionsto thereby vary' the speed of operation of said motor, a cam for adjusting said lever and means for adjusting said cam.

6. The -combmat1on 1n a sprlng' mlotor -Which said second element is mounted

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