US893865A - Telltale apparatus for running machinery. - Google Patents

Description

PATENTED JULY 21, 1908.

H. O. ORMISTON & W. D. MARTIN. TELLTALE APPARATUS FOR RUNNING MACHINERY.

APPLICATION FILED AUG. 10 1907.

- I UNITED. STATES. PATENT OFFICE. nARRYoaiII's'roN,oRMIsroN, or KoeARiin, AND WILLIAM DAVID MARTIN, or ASHFIE'LD, NEW SOUTH warns, AUSTRALIA.

TELLTALE APrARA'rUsroR nimmns MACHINERY.

No. seases.

ing-1s a specification...

This invention has been devised with a' view to install it on running machinery in order to warnthe attendant, while the machinery is running, (among other things) when the bearings have been worn down to such an extent that there is a danger (in electric motors, for instance) of the armature coming into contact with the poles. Further, should anything happen which might cause the armature, or any part of the machinery to come in dangerous proximity withv the poles in electric motors, although the bearrings may not have been worn down, the attendant;shall be warned ofthe danger ofdaii'ia gfiflshatjisflikely'to'ensue to the armal tu f' fifithe-mdtor unless it be stopped runnin g' without unnecessar delay, in order to examine and locatethe efect, if any.

The apparatus consists of two blocks of ebonite, or analogous material, one block bein above the other; each block-is'pro- 'vide" -with contact points, which, if brought iht'o co n'tact will cause an electric bell to ring q;;.. 'ther warning sound to be made. The two blocks and the contact points will be kept apart by means of a spring. The apparatus ,will, be installed inany suitable osition, in an electric motor, preferably between two of thepoles of the motor, and will be so disposed that position that the armature, as it becomesuncentered owing to .the wearing down of the bearin s, shall touch the upper surface of thetop lock and depress It so that the contact oints on the two locks shall touch one anot er and thus close an electric bell circuit or. cause any suitable tell-tale appliance to give audible warning of thedamage that is hkely to ensue, unless immediate steps are taken to remedy the defect.

In the accompanyin drawings the invention is shown as it will be installed on an electric motor.

. '55- Figure 1 is a half vertical section and half 4 Specification of Letters Patenti Application filed August 10, 1907. Serial No. 333,069.

upper C of the well,projects downwards a dowel pin H, which enters the projecting part C of PatentedJuly 21, 1908.

side elevation of the appliance complete. Fig. 2 is a sectional plan of the same, the section being taken on the'line 12 of Fig. 1. Fig. 3 is an end-elevation of a motor frame showing the a liance, on a small scale, installed in position between two poles of a motor.

1 A is the lower ebonite block. to which is. screwed a li ht brass casting B. In the center of the bock A is a welltC, countersunk into the solid ebonite, the wall of which .well is continued above the top level of the block A, at 0 for a purpose to be afterwards indicated. Projecting upwards from the casting B are hollow contact oints D, D. Vertically above the lower ldck A, is the u per ebonite block E, the upper surface of which is recessed to contain an ebonite roller F, which is intended to receive the impact of the armature, (or other part of'running machinery), should the axial bearings, be so worn down that the armaturehas dropped In orderto reduce 'the friction of the-roller F in its recess, the

from its true position.

roller or the recessr may be. provided with balls f in ball races;,.

On'the underside of the upper block is a light brass casting B similar to the casting B on the lower block A. The contact points D D will be vertically'above the lower contact points D, D, and will be eentered with them by means of the guide dowels G, G, which, preferably, pro'ect downwards from the up er block E. mm the center of the block E, and vertically above the wall the well, and rests upon a helicaL spring J within the well-r The spring Jwillibe' nic'ompression and will raise the upper block E so that the contact points D,- g 'hanuemain apart, assho'wn 1n the drawings. On the under side of the up er block E is an annular groove 6 which is a a ted to receive the to end of the wall C of t e well when the bloc E is depressed. is a small battery which may be placed in any convenient position; L is the bell, and k, k, are the connecting wires. 1

In an electric motor, the appliance is referably located between two i the poles g, P,- as'shown in Fig. 3; I

In an electric motor the a pliance will op-z erate as follows, reference gein' made par ticularly to 3:- When the earings are so worn down that the armature M is out of center, it will approach and touch the roller F, thus depressing the upper blocl: E, causing the upper and ower contact points D, ID,

to touch and close the bell circuit when the bell L will ring and warn the attendant of the proximate danger of neglecting the summons; Having now described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In running machinery, a warning or tell-tale appliance consisting of a lower ebonite block with projecting metallic contact points, an upper ebonite block with propjectmg metallic contact points, a spring to reep the upper and lower, contact oints a art, and an electric bell circuit w 'ch sha be closed when the contact points on the two blocks touch, for the purpose of warning the attendant, as herein set forth.

2. In running machinery, a warnin or tell-tale appliance consistingof a lower ebonite block with projecting. metallic contact points and a spring, an upper ebonite block with projecting metallic contact points, such block resting upon the spring on the lower block, a roller recessed into the upper face of the upper block, such roller being adapted to sustain the im act of the runnin part of the machinery suc as the armature wien brought into contact therewith, and an electric bell circuit which shall be closed and the bell caused to rin when the upper block is depressed by t e armature and the contact points are thus made to touch, as specified.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

HARRY ORMISTON @RMISTON. WiLLIAM DAVID MARTIN.

Witnesses;

MANFIELD NEWTON, ArnnnrMwsnr.

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