US846522A - Polarized electric signal-bell. - Google Patents

Description

PATENTED MAR. 12, 1907.

w. M. THOMAS. POLARIZEDBLEGTRIG SIGNAL BELL.

LPPLQIOATIDN FILED AUG. 3, 1906.

2 SHEETS-SHEET 1.

BATENTBD MAR. 12, 1901 w. M. THOMQS, 1

2 sinus-SHEET a.

APPLIOATION FILED AUG, 3, 1906- nwemrib UNITED; STATES PATENT OFFlGE.

WILLIAM M. THOMAS, F onIoAeo, ILLINOIS, ASSlGNQR or ONE-HALF r0 orro nIsnNscIrIML, or CHICAGO, ILLINOIS.

POLARlZED- ELECTRIC SIGNAL-BELL.

To all whom it may concern:

Beit known that I, WILLIAM M. THOMAS, a citizen of the United States, residing at a Chicago, in the county of Cook and State of cheap to construct, ornamental in apperance, and so arranged and constructed as to be substantially bug-proof.

Other objects of my invention will become apparent to those skilled in the art from the following description, taken in conjunction with the accompanying drawings.

In the drawings, Figural is a plan View of my bell, showing art of the gong broken away, revealing t e internal mechanism. Fig. 2 is a section taken on line 22 of Fig.v 1. Fig. 3 is a section taken on line 33 of Fig. 1. Fig. 1 is an end view of the electromagnet and its support.

In all of the views the same numerals of reference indicate similar parts. i

' In the drawings, 5 is a base-plate, which i may he of insulating material, as shown in I the drawings, or it may be of metal with the Z binding-posts 6 6 properly insulated therefrom. The binding- posts 6 and 6 are the terminals of the coils 7 and 7 and 7 are shown connectcdin series and in the proper direction w th reference to each other, for the purpose of causing the responsive armature thereof to respond to alternating impulses of electric current that may be sent through them.

8 is the core of. the electromagnet provided with terminal pole- pieces 9 and 9, the latter being shown'more plainly in Hg. {1. A support 10, which may be of any desired material-such as brass, iron, or the like-is located, with reference to the core 8 and its respective pole-pieces, midway between the said pole-pieces, the core 8 fitting snugly in a perforation made through said support. The support 10 is perforated from its top surface to receive the threaded stem 11 for the purpose of securing the gong 12 in place thereon.

said gong being held in position by reason of Specification of Letters Patent. Application filed August 3,1906. Ser a No 329.018-

The coils 7 Q Patented March 12,1907.

I its threaded engagement with the threaded stem 11 and'by means of the nut 13.. The gong may be vertically adjusted by the means employed for its support. I

Screws 14 and. 1'4 pass through the base 5 into threaded perforations made in the legs 15 '15 of the support 10. Pointed pivotal screws 16 16 take through threaded perfora- 3 tions made in the legs 15 15 and form apiv- 1 etc]. axis upon which the armature 17 is adapted to be vibrated. The armature 17 is preferably made of ether of steel hardened and ermanently ma netized when it is denating impulses of electricity. Hammers opposite pole-piece. When an impulse of electricity is sent in the opposite direction to that of the first-named impulse, the endof the armature that was previously repelled will he attracted and the other end will be repelled, so that impulses of electricity at frequent intervals and passing through the coils in respective opposite directions will serve to vibrate the armatureand cause the hammers or clappers 19 and 19 to alternately strike cause the gong to sound forcausing the desired alarm. Y

The bell may be placedin any position on the walls or the ceiling or in any desirable situation without materially affecting the operation thereof. j

While l have shown and described only a single embodiment of my invention, it is apthe under side of the gong 12, and thereby i made therefrom without dcpartipg from the spirit and scope thereof. j ll aving thus described. my invention, what l claim, and desire to secure by Letters Pat- 'ent of the Lnitcd States, isp l. A signal-lz0ll comprising a base, a hori- ZUlll'ttllIY-(llS'POHt-ll clcctromagnct-cnre, hav- 18 and 18, adapted tostrikethe under edge parent that considerable variation may b8 sirab e to use the bell for response to alter- One endof the arma- 9 and theother end will be attracted by the v ing downwmdly-projeciing poles, a support, carrying said core located intermediate vthe poles thereof, a 'st em vertically rojectin from said su 'murt; a gong adjustabyeecure to said stem, and 2m armature centrally pivoted to said support, the ends whereof con- 5 front the mics of said imwnet. I a

2. In combination, a nmgnet-eore having projecting ole-pieces, a centrally-located tl'ian ular su ))01't hav 1"" le' s for attach- PJ D ment to :1 base, an armam'lre pivoted to said 'f support piviet -siudehiking throu 11 said

Images