US1570922A - Servomotor - Google Patents

Description

Jan. 26,1926.- f1-,5'7o,922

. o; PHILIPP SERVOMOTOR Filed July e. 1925 lar to Fig. 2,

Patented Jan. 26, 1926.

OTTO PHILIIP, OF WASHINGTON, DISTRICT OE' COLUMBIA.

snRvoMoToR.

Application filed nuy e, 1925. serial No. 41,698.`

To aZZ whom t may concern.:

Be it known that I, OTTO PHILIPP, a citzen of Germany, residing at ldlashington, in the District of` Columbia, have invented certain new and useful Improvements in Servomotors7 of which the following is a specilication.

This invention relates to driving mechanism. provided with a motor the driving action of which is cut off automatically after it has operated for a predetermined period or extent; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed. This apparatus can be used for operating a press, for operating steering devices, and for many other purposes where any desired amount of power is required.

In the drawings, Figure 1 is a front view of an apparatus constructed according to this invention. Fig. 2 is a plan view of the same. Fig. 3 is a side view of the parts shown in Fig. 1. Fig. 4 is a plan view simibut shows a modification.

A supporting frame 6 of any approved construction is provided, and 7 is a motor supported by the frame. This motor is preferably an electric motor yof any suitable make provided with a rotary driving shaft 8, but any other approved motor or operating device may be used. This motor is supported by rods 10 and 12 attached to it at one end, and having their other ends pivoted to a stationary pin 14 on the frame. A handle 15 is secured to the motor for convenience in moving it laterally and pivotalf 'ly by hand. A friction driving disk 16 is secured on the motor shaft 8. Y

A driven shaft 18 is journaled in the frame, and has 'a friction driven disk 19 secured on it, and arranged in driving relation with the disk 16. When the center of the driving disk bears on the disk 19, no motion is imparted to the latter. The weight of the motor and the driving disk is preferably used to hold the two disks in driving engagement.

One end portion 2O of the shaft 18'is screwthreaded, and is journaled in a screwthreaded bearing 21 on the frame 6. The other end portion 22 of thek shaft is rectangular in cross-section and is slidable longitudinally in a sleeve 24 journaled in a bearing 25 on the frame. A toothed driving wheel 26 is secured to the sleeve 24.

When the motor is moved by hand to the and the disk 19 is revolved by engagement with vthe disk 16, the shaft 1 8 is rotated. This shaft is then moved longitudinally by its screwthreaded portion and bearing until the driven disk again bears against the center of the driving disk. The driven disk and its shaft then stop automatically. The speed of the driven disk vand its shaft increases gradually as the motor is moved from its neutral position to the right, until it reaches apredetermined maximum, according to the eXtent to which the motor is m-oved. The speed of the driven disk and shaft then decreases gradually and automatically, and finally ceases altogether.

The driven shaft 1S can be usedvdirectly as the shaft of a small screw press, or for actuating steering devices. The toothed driving wheel 26 can however be used to transinit the rotary movement of the driven shaft to any suitable mechanism so that it may be used indirectly.

In the modification shown in Fig. 4, one of the rods 40 only is used, and is pivoted to the motor 7 eccentric of its driving shaft or axis by a pin 41. The motor can be moved circumferentially of the pivot pin 14 as hereinbefore described, and it can be moved additionally about the pin 41 as a center. This additional motion of the motor gives it a tendency to return automatically to its normal and central position, which is advantageous in some applications of this apparatus.

The pivot pin right in Fig. 1,

14 in Fig. 1 can be moved to "the right or to the left of the position shown,

so that the device can be set and adjusted to enable the driven disk to be moved into and out of its middle position with facility,

independently of the handle.y Any other approved means may be used for holding the disks in contact, such as a spring, if the mechanism is arranged in the reverse manner from that shown.

What I claim is:

1. In apparatus of the class described, a rotary motor provided with a friction driving disk, a shaft provided with a driven disk which engages with the driving disk, means for moving the motor parallel to the said shaft, and means operated by the said shaft for moving it longitudinally in the same general direction as'the motor to stop the driven shaft automatically.

2. In apparatus of the class described, a

rotary motor provided wth a friction driving disk, means for vsupporting the motor pivotally for lateral movement, a shaft provided with a` driven disk which engages with the driving disk, and means operated by the said shaft for moving,l it longitudinally to stop its rotation automatically.

3. In apparatus of the class described, a rotary motor provided with a friction driving disk, a shaft provided with a. driven disk which engages With the driving disk, said shaft being provided With a screw threaded portion7 a bearing engaging with the screwthreaded portion, and means for moving the d motor laterally, said shaft being moved longitudinally by the screwthreaded parts when rotated, so that its rotation is stopped automatically.

4. In apparatus of the class described, a rotary motor-provided with a friction driving disk, a supporting,r arm pivoted at one end to a stationary support and pivoted at its other end to the motor eccentric of its axis, said motor being movable laterally upon tivo circular arcs, a shaft provided with a driven disk which engages with the driving disk, and means operated by the said shaft for moving it longitudinally to stop its motion automatically.

In testimony whereof l have affixed my OTT() PHILIP?.

signature.

Cfr

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