US402043A - Annunciator-drop - Google Patents

Annunciator-drop Download PDF

Info

Publication number
US402043A
US402043A US402043DA US402043A US 402043 A US402043 A US 402043A US 402043D A US402043D A US 402043DA US 402043 A US402043 A US 402043A
Authority
US
United States
Prior art keywords
drop
armature
annunciator
pieces
post
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Publication date
Application granted granted Critical
Publication of US402043A publication Critical patent/US402043A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/24—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane
    • G08B5/28—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane with hinged flap or arm

Definitions

  • This invention has for its object to construct an 'annunciator-drop.
  • two bent arms or pieces are attached one to each end of a core, upon which a coil is wound, or may be formed integral with it, the said bent arms extending toward each other and forming the pole-pieces of the electro-magnetic device.
  • the armature is attached to a flat spring secured to a post "or frame, to which post or frame the said electro-magnetic deviceis also attached.
  • the target or disk is pivoted to the said post or frame, it having on its rear side a projection which engages, when lifted, the retracted armature, but which is released when the armature is attracted.
  • Figure 1 shows in front elevation the annunciator-drop embodying this invention, the target or disk being shown in dotted lines; and Fig. 2, a top view of the annunciator-drop shown in Fig. 1.
  • the device is attached to a post or frame, cl, preferably by the same fastening employed to attach one of the bent pieces to the core.
  • the armature e is attached to a flat spring, e, secured to the said post or frame 01, said armature being rectangular in shape and adapted to make contact with both the pole-pieces c c.
  • the target or disk f is pivoted to the said post or frame (I, it having on its rear side a projection, f. ⁇ Vhen the armature e is retracted and the target or disk lifted, the projection f bears upon the upper side of the said armature; but when the armature is attracted the said target or disk will be released and fall by gravity in the usual manner.
  • the device herein described is very cheap to manufacture, is durable and powerful, it presenting large-surfaced pole-pieces for the armature.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Eye Examination Apparatus (AREA)

Description

(No Model.)
.J. M. STUART. ANNUNGIATOR DROP.
No. 402,043. Patented Apr. 23, 1889.
WW5; e5
I N PETERS. ma-Lithognphsr. Washington D.C.
UNITED STATES PATENT OFFICE.
JOHN M. STUART, OF BOSTON, MASSACHUSETTS.
A NNUNClATOR-DROP.
SPECIFICATION forming part Of Letters Patent NO. 402,043, dated April 23 1889.
\ Application filed May 22, 1888. Serial No. 274,673. (No model.)
To all 1071,0112, it may concern.-
Be it known that I, J OHN M. STUART, of Boston, in the county of Suffolk and State of Massachusetts, have invented an Improvement in Annunciator-Dro i s, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.
This invention has for its object to construct an 'annunciator-drop.
In accordance with this invention, two bent arms or pieces are attached one to each end of a core, upon which a coil is wound, or may be formed integral with it, the said bent arms extending toward each other and forming the pole-pieces of the electro-magnetic device. The armature is attached to a flat spring secured to a post "or frame, to which post or frame the said electro-magnetic deviceis also attached. The target or disk is pivoted to the said post or frame, it having on its rear side a projection which engages, when lifted, the retracted armature, but which is released when the armature is attracted.
Figure 1 shows in front elevation the annunciator-drop embodying this invention, the target or disk being shown in dotted lines; and Fig. 2, a top view of the annunciator-drop shown in Fig. 1.
The device is attached to a post or frame, cl, preferably by the same fastening employed to attach one of the bent pieces to the core. The armature e is attached to a flat spring, e, secured to the said post or frame 01, said armature being rectangular in shape and adapted to make contact with both the pole-pieces c c. The target or disk f is pivoted to the said post or frame (I, it having on its rear side a projection, f. \Vhen the armature e is retracted and the target or disk lifted, the projection f bears upon the upper side of the said armature; but when the armature is attracted the said target or disk will be released and fall by gravity in the usual manner.
The device herein described is very cheap to manufacture, is durable and powerful, it presenting large-surfaced pole-pieces for the armature.
I claim- The annunciator drop herein described, comprising the core a, coil a, metallic pieces I) b, bent to present large fiat-surfaced polepieces 0 c, the armature 6, attached to a spring, e, the target or disk f, pivoted to move in a plane parallel with the fiat-surfaced pole-pieces, and the support (1, substantially as described.
In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.
JOHN M. STUART.
WVitn esses:
BERNICE J. NoYEs, J. C. SEARS.
US402043D Annunciator-drop Expired - Lifetime US402043A (en)

Publications (1)

Publication Number Publication Date
US402043A true US402043A (en) 1889-04-23

Family

ID=2470999

Family Applications (1)

Application Number Title Priority Date Filing Date
US402043D Expired - Lifetime US402043A (en) Annunciator-drop

Country Status (1)

Country Link
US (1) US402043A (en)

Similar Documents

Publication Publication Date Title
US2085206A (en) Basketball basket support
US402043A (en) Annunciator-drop
US1026256A (en) Sounding-disk.
US1564305A (en) Automatic mail-box signal
US461711A (en) James preston
US1396137A (en) Button or badge
US418868A (en) Annunciator
US412544A (en) Show-case
US482263A (en) Erastus d
US1285037A (en) Paper cut-out.
US623336A (en) Lantern-holder
US878255A (en) Mirror attachment for chairs.
US118855A (en) Improvement in toy-hoops
US701572A (en) Electric bell.
US283073A (en) gapron
US686693A (en) Garment supporter or fastener.
US1852249A (en) Animal trap
US1910911A (en) Eye set for dolls
US350449A (en) Annunciator
US227592A (en) Buckle-loop for suspender-ends
US418442A (en) Bottom
US793349A (en) Animal-trap.
US730136A (en) Button-clasp.
US452585A (en) Annunciator-drop
US1159013A (en) Magic pencil.