US663035A - Apparatus for disconnecting machinery. - Google Patents

Description

No. 663,035. I Patented Dec. 4, I900. A. MAUL.

APPARATUS FOR DISGONNECTING MACHINERY.

(Application filed Jun. 3, 1900.) v

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*No. 663,035. Patented Dec. 4, I900. A. MAUL.

APPARATUS FOR DISCUNNEGTING MACHINERY.

(Application filed Jan. 3. 1900.)

4 Sheets-Sheet 2.

(No Model.)

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No. 663,035. Patented Dec. 4, I900.

A. MAUL.

' APPABATUS FOR DISCONNECTING MACHINERY.

(Ajaplication filed In. a, 1900.

(No Model.)

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Patented Dec; 4, I900. A. MAUL.

APPARATUS FOR DISGONNEGTING MACHINERY. ('A uuu n filed Jan" 9, 1900.

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. I Inventor UNITED STATES PATENT OFFICE...

ALFRED MAUL, OF DRESDEN, GERMANY.

APPARATUS FOR DISCONNECTING MACHINERY.

SPECIFICATION forming part of Letters Patent No. 663,035, dated December 4, 1900.

Application filed January 3, 1900. Serial No. 288. (No model.)

To all whom it may concern.-

Be it known that I, ALFRED MAUL, a citizen of the Kingdom of Saxony, residing at Dresden, in the Kingdom of Saxony, in the German Empire, have invented certain new and useful Improvements in Apparatus for Disconnecting Machinery; and I do declare the following to be a full, clear, and exact de scription of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawings, and to the characters of reference marked thereon,which form a part of this specification.

In manufactories and other installations where machineryis used accidents frequently occur and theirseriousness is increased by reason of the workman who meets with an accidentor his companion near him being unable machinery at the place of an accident or where this is seen to be about to occur.

The apparatus is preferably operated by electricity and through suitable connections for releasing a heavily-weighted lever normally held in a slightly-oblique position, in falling from which and with the force thereby obtained it shifts a driving-belt from a fast to a loose pulley or disengages a toothed coupling or the like.

Figure 1 is a side elevation of a mechanism embodying my invention. Fig. 2 is a similar view showing the smaller lever in the act of falling. Fig. 3 is also a side elevation showing the levers in their depressed positions. Fig. 4 is a front elevation. Fig. 5 is a plan view. Figs. 6 and 7 are detail views of the pawl f. Figs. 8 and 9 are detail views of the pawl and armature and pivot and its attachments.

a is the heavily-weighted lever, the lower end of which is fixed in a turning pivot I), carried in a frame 0, attached to a wall-plate c, and held in the normal position by means of a tooth d in said pivot engaging with a pawl f, mounted on a shaft 6, Fig. l, the pawl fbeing held by a spring g, which at one end is attached to a set-screw h and at the other end to an extension 't' of the pawl. In order to be able with only a slight exertion of force to release the tooth d, a smaller weighted lever Z is provided, which is fixed in a turning pivot is, also carried in the frame 0, and, like the lever a, standing at a slight angle to the vertical line. In the pivot 70 is a tooth m, engaging against a lug n of an electromagnetarmature 0, which, like the pawl f, is held suspended, or so that it may oscillate. The lug n is held to the tooth on by a spring 19, Figs. 4c and 5, attached at one end'to a setscrew q, Fig. 5, and at the other end to an extension of the magnet-armature 0.

In addition to the tooth m the pivot 7c is provided with a lug r, so placed that upon the turning of this pivot it strikes a projection 5, Figs. 7 and 8, of the pawlfand presses this backward out of reach of the tooth d.

t represents two magnet-bobbins arranged in front of the armature 0 and interposed in a circuit. The contact places are located in the machinery rooms or workshops, within easy reach of the workmen. These magnetbobbins serve when energized by the current to attract the armature and so bring it out of reach of the tooth m.

With the apparatus in the normal or stateof-rest position of Fig. l and a workman, having regard to a prospective or actual accident, desiring to disconnect the engine to stop the transmission of movement therefrom he will at his own or at an adjacent workmans place close the contact, so that the magnet-bobbins receive current, whereupon the operation is as follows: The magnet bobbins t attract the armature 0, so that the small weighted leverlcauses the lug r of this lever to strike against the projecting part 3 of the pawl f and the drawing away of this latter from the tooth d, which bears with great force against it, so that now the larger Weighted lever a, being no longer held, falls to one side, Fig. 4:, and by. reason of the great force thereby developed brings about the displacement of the driving-band of the prime mover from a fast to a loose pulley or the disconnection of a toothed coupling or the like.

To this end there is fixed on the turning pivot b of the large weighted lever a and further connected with this latter by a bolt to a grooved wheel-segment o, to which a wire rope to is attached, and thence led and attached to a sliding fork for displacing the driving-band or to a lever for disconnecting the coupling or the like, which parts are correspondingly moved when the weighted lever a falls.

w 'y z are set-screws located in the frame 0 for the large and small weighted levers, by which these latter, the magnet-armature, and the pawl are set to correspond to the beforedescribed action, the screw on preventing the springp from drawing the armature too far back and away from the influence of the magnet-bobbins, the screw y preventing the spring 9 from pulling the pawlftoo far over the stop-tooth'd, and the screw 2 preventing the lever a from taking a too-upright position and so that this lever will when released always fall to one side.

In order to be able to regulate the force of the falling levers a Z, these are provided, respectively, with weights ct Z, adjustable by set-screws 1 2.

When the apparatus after being actuated is in the position of Fig. 3, it can be again brought into a position for further use by raising and locking in the described manner first the small weighted lever Z and then the larger lever a.

In the described arrangement and action of the apparatus it is supposed that the magnetbobbins are traversed by a so-called working current only when the contacts are closed; but instead of such a current a continuous current may be employed, in which case the normally-attracted armature 0 can be located on the left side of the magnet-bobbins. Only then the lug 'n must be made sufficiently long to come within the reach of the tooth m, it also being necessary to provide a spring which upon the break of circuit would withdraw the armature 0 with its lug n from the tooth 'm.

In the above or equivalent construction of the apparatus the release of the weighted levers may, instead of electrically, be accomplished by other meanssuch, for instance, as by a pull on a rope.

What I claim, and desire to secure by Letters Patent, is

1. In a mechanism such as described, a larger weighted lever,a turn ing pivot to which the lever is secured, and which is provided with a tooth, combined with the pivoted pawl with which the tooth engages, and an electromagnet and its armature, a shorter weighted lever, a pivot to which the shorter lever is connected, and which is also provided with a tooth to engage with the armature, and a projection for engaging with the pawl, whereby when the smaller lever falls, the larger lever is tripped, substantially as shown.

2. In a mechanism such as described, a longer weighted lever, the pivot to which the lever is connected and which is provided with a tooth for engaging with the pawl, a pivoted pawl, an electromagn et and its armature, combined with a second shorter weighted lever, a pivot to which it is connected and which is provided with a tooth for engaging with the armature, and a projection for engaging with the pawl, and a segment connected to the pivot to which the longer weighted lever is secured, substantially as described.

3. In a mechanism such as described, the longer weighted lever, the turning pivot to which it is secured, the segment secured to the pivot, the tooth cl also secured to the pivot, the pawlfwhich engages the tooth upon the pivot and has a projection s, an electromagnet, and its armature provided with a lug .upon its lower end, combined with a shorter pivoted and weighted lever, the pivot to which it is secured and which is provided with a tooth on, which engages with the lug upon the armature, a spring connected to the upper end of the pawl so as to force its lower end toward the pivot b, and the projection r secured to the pivot of the shorter lever for striking against the projection on the pawl, and the regulating set-screws for limiting the movement of the levers, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ALFRED MAUL.

Witnesses:

EMIL REINHELT, HERNANDO DE Solo.

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