US937594A - Electric bell. - Google Patents

Description

E. A. GRAHAM.

' ELECTRIC BELL.

APPLICATION FILED FEB.

3 SHEETS-SHEET l.

Patented Oct. 19, 1909.

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FZ/WW ME V E. A. GRAHAM.

ELECTRIC BELL.

APPLICATION rum) FEB. 2, 1909.

Patented 001). 19, 1909.

s SHEETS-SHEET 2.

5 Luv/MM I E. A. GRAHAM.

ELECTRIC BELL.

APPLICATION FILED FEB 2, 1909.

937,594. Patented 0pt.19,1909.

3 SHEETS-SHEET 3 UNITED srnrns ELECTRIC BELL.

Specification of Letters Patent. 7

()FFIGE.

tile Oct. 19, 1909.

raten Application filed-February 2, i909. Serial No. 475,589.-

To all rah/om it may concern:

. Be it known that I, Ebwnnn ALFRED Gin"- HAM, a subject of the King of Great Britain and Ireland, residing at Brockley, in the g openings in the top and bottom of the casing so that the latter is at these parts water-" county of London, England, have invented Improvements in or Relating to Electric:

Bells, of which the following is a specification.

- This invention relates to electric bells of the kind in which the strikingmechanism comprises a striker constituted as a movable magnetic element adapted tobedirectly influenced by the electro-magneticy element in such manner that the striking of the bell is effected by momentum of the magnetic element'acquired upon excitation .of the electro-magnetic elements and damping of the bell vibrations or rebound of the striker is prevented by the combined action on the striker ofgravityand'that of the electro-magnetic device aided or not by asprin'.

g Y The object of the present invention isto generally improve the construction .of such a pletely protected against moisture and so that the parts which are exposed shall be unj enamel, or'; be otherwise treated so that alfected thereby.

In the accompanying drawings, Figurel arts removed, Fig. 2 a'central vertical sectlon on the line A of Fig. 1, and Fig. 3 an underside view,

is a front elevation with A of a sin 10 stroke bell. Figs. 4 and 5 are front e ovations, showin modifications. Fig. 6 is a detail view, p..rt'ly in section,

showing a further modification; Fig. 7 is a cross section of a modified fdrm of striker.

AS shown in Figs. 1, 2 and 3, a skeleton frame a is employed having a rim the upper portion 12 of which is appnoximately semic lindric'al and of an interfial'r'adius greater than the radius correspondihg to the external diameter of the gong :0 so that the. said gon is partially surrounded thereby, while the ower'portion 6 of the rim, also of ap proximately semicylindrical form, is of lesser Width than the portion Z9" but -"corresp onds .substantially in dimensions to the edge of the gong c. The frame a may he supported in any convenient way,'lugs (,1 being shown on the rim portions 1), b for this purpose.

The gong c is carried by acasing esecu ed, as by screws'e 'to the fra'ame a, the attachment of the gong c to the casings being efiected by a screvv c 'enteringjalug orprojection e on the casing. The casing e serves bell so that the electrical parts arecn'uefl Ito messes solenoid f which may convenin turn sweated into correspondingly shaped i tight. The casing (2 also constitutes a terminal chamber c that is fitted-twith a Watertight cover 6' andv a watertight gland e to which for example a lead, sheathed cable 2' i passing therethrough can be soldered. The terminal chamber c contains a block 7' of insulating material to which are secured two metal terminal blocks is, k the ends of the solenoid winding 7 being attached thereto by the two conductors n n of the cable 2' similarly attached by the screws n a The solenoid is provided' with a combined solenoid'co1'eand'gong. Striker 0 that may advantageoiisly. be'madehollow with a rounded head-0 andjlie sheathed, asby ele'ctro-deposiheri cactiom sfuchIfor-exanlple as copper; or, alternativelyg'be coated with an appropriate composition, such .for example as vitrified there shall be no liability of the core sticking in the tube 9 by reason of rust or other deposit. .To act as a support for the core enoid f when the latter is denergized, a flanged tube 7) of copper or similar metal proper-operative position relative to the sothe current.

the screws m m respectively and .the ends ofdize or becomeadversely ali'ected by atmos.

the continuance of the flow of cur-j;

iently be ivoundfiipon a tube 9 'the ends WhlCh are sweated into cheeks it themselves- ="tion, with afipnetal that will not readily (ax-i striker ,0.,-.and maintain the same in the v may be attached by screws p to the lower che'elr h, the said tube having a perforated d relatively to. and the proportionatele'ngth 0f.

oid iritheturniug the core to interme diate position and finally ret'urnmgthe core to the initial position uponinterruptiomof Asa modificatioin'the core 0 instead or d-istance by forming the core 0 with lon itu-- hollow electro-niagnctic winding having its ing the striker partly within "and partly I ceases casing surrounding said winding, cheeks into which the tube is sweated andthemselves sweated into the said casing, a magnetizable striker vertically movable through the said tube and a perforated tube alined with'the latter tube in which the striker is normally supported. 7

'5. An electric bell, comprising a gong, a solenoid having its axis vertically arran 'ed, a tube extending through said solenoi a casing surrounding said Windin ,cheeks-into which the tube 1s sweated an themselves sweated into the said casing, a tennmal chamber forming part of said casing, a

rectly striking the (gong 0, may, as shown in Fig. 4:, be arrange to act against a striker head 0 which is arran ed to slide within a bearing 0 and is maintained normally out .5 of contact with the gong and seated upon its bearing 0 by a spring 0 the. arrangement being such that when the core 0, after having acquired momentum, forces the head,

' against the influence of the spring 0 into 10 contact with the gong, the spring assists the combined action of gravity and the solenoid in producing return movement of the striker. As will be obvious, in lieu of arranging the parts Within the gong as illustrated, the

15 gong might be located to be struck exteriorly, as shown in Fig. 5, Where the luge for the gong c is formed'upon the frame a and the latter extended as at a to support the casing 6. Also, in either of such arrangements, any

as ordinary contact maker and breaker or cir cuit interrupter might be employed to convert the bell from a single stroke into a vi- I brating bell, the same being either inclosed,

as shownat r in Fig. 6 in the Water tight casing e, or in a separatecasing as diagrammatlcally indicated at s m'F 1g. 1. As will also be obvious, the construction of the elements may be modified without departing from the scope of the invention, as for inwatertight gland through which" the leads to, the solenoio. pass into the chamber, a magnetizable striker vertically movable throughthe said tube and a perforated tube almed normally supported. I

6. An electric bell comprising a gong, a solenoid having its axis vertically arranged, a casing inclosing the solenoid in a waterchamber, a removable Waterti ht cover for said chamber, a watertight g and throu'h which the leads to the solenoid pass into to e chamber, a circuit maker and breaker arranged in the circuit of said Windin a striker vertically movable through the-so e oid casing and a perforated carrier for su 4 porting the striker partly Within and part y without said casing. I

7. An electric bell, comprising a gong, a solenoid having its axisvertically'arranged, I a tube extending through said solenoi a casing s rrounding said windin cheeks into which (is tube is sweated an themselves sweate into the said casing, a'connection: i951 box i'giirming part ofjsaid casing-.waiwaterfl tight removable cover therefor,'a watertight, gland through which the leadsto. thesoleneid, pass into'the connection box, a'circu'it maker: and breaker andcontact terminalsin's'aidllfl box, a magnetizable striker ,vertically movf able through the saidtubeand, ap'erfor'ated {tubealined with the latter tube inwhich the striker is normally ,:supported. ,l 1

dinal grooves, as shown in Fig. 7, for light ening the weight thereof. hat-I claim is:--

1. An electric bell. comprising a gong, a

32115 vertically arranged, a water tight casing iuclosing the said winding cxteriorly and interiorly, a non-corrodible striker vertically movable through the 'ivatertight cas- 40 ing and a perforated carrier for supporting the striker partly within and partly Without the said casing.

2. An electric bell comprising a gong, a hollow electromagnetic winding having its axis vertically arranged, a watertight casing inclosing the said winding exteriorly and interiorly, a hollow non corrodible striker vertically movable through the v 'lttjtrt' 'htg, casing and a perforated carrier for sup t without the said casing. v solenoid having its axis vertical arran ed, 3. An electric bell comprising agong, a a tube extending thro lgh said solenoi a solenoid having its axis vertically arranged, casing shrro'unding said winding, cheeks into a casing inclosing the solenoid in a waterwhich the ,tube is secured in a Watertight, 55 tight manner and. constituting a. terminal manner and themselves secured in'a water chamber, a removable, Watertight cover for tight manner to the said casing a terminal said chamber, a Water tight gland through chamber forming part of san ,casing, a' which the leads to the solenoid, pass into Watertight removable cover therefor, 11 the chamber, a striker vertically movable Watertight glandthrough which the leads to watertight removable cover therefor, a so tight manner and constituting a terminal 90 8. An electric bell comprisinga gong, a 115 60 through the solenoid casing anda perforated the solenoid pass into the chamber, a-mag,,';2" 3

carrier for supporting the striker partly netizable striker vertically movable throng W within and partly Without said casing. the said tube, a perforated tube alined with An electric bell, comprising a gong, a the latter tube and in which the striker issolenoid having; itsaxis vertically arranged, normally supported, a frame, carrying the" tube extending through said. solenoid, a l

casing of the solenoid and a lug on the casoregomg parts and is struck by the striker onits inner periphery. v

9. An electric bell,comprising a gong, a solenoid having its axis vertically arran ed, a tube extending through said 'solenoi a casing connected to said tube and inolosing said winding in a watertight manner, a connection box forming part of said casing, a water tight removable cover therefor, 21 watertight gland through which the leads to the solenoid pass into the, connection box, a circuit maker and breaker and contact terminals in suid'box, a nmgnetizable striker vertically movable through said tube, a perforated tube ,alined with the latter tube, in

which the strike; is normally supported, a

frame carryingi1 t}? casing of the solenoid and 9. lug on t e" using carrying the gong so that it conceals the whole of the foregoing parts end is struck by the striker on its inner-periphery.

Signed at St. Andrews Works Cr'ofton Pork -Br0ck1ey, London, this fifteenth day ofJanuai- 1909.

EDWARD ALFRED GRAHAM;

Witnesses: f

ELI ZARRARD,

' W. J. RICKETS.

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