US173447A - Improvement in electro-magnetic annunciators - Google Patents
Improvement in electro-magnetic annunciators Download PDFInfo
- Publication number
- US173447A US173447A US173447DA US173447A US 173447 A US173447 A US 173447A US 173447D A US173447D A US 173447DA US 173447 A US173447 A US 173447A
- Authority
- US
- United States
- Prior art keywords
- armature
- latch
- electro
- improvement
- annunciators
- 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
Links
- 230000005484 gravity Effects 0.000 description 4
- 230000036633 rest Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
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
Definitions
- the aforesaid latch is again raised by means of a vertically-sliding rod carrying a pin which lifts the latch, and, when thus lifted, allows the armature to fallback by its own gravity then the end or hook of the -lat'chv rests on the top of the armature again,
- FIG. 1 is a front view.
- Fig. 2 is a verti-l cal section, showing the working parts.
- A is the box orcase ofthe annuuciator, having a glass fron t, with transparent places for showing the numbers.
- B is ⁇ a cast-metal frame, secured to the back of said box, which supports the electro-magnets by the cores C, and also in the front end of October 18, 1875.
- E is a latch lying above the magnets and pivoted at the y rear end to a post, e, fixed in the frame B, the front end being bent downward in the form of a hook, which rests on the top edge of the armature D when the armature is away from the magnet, which hook, however, holds the armature up after the circuit is broken.
- a numbered plate, F which is brought into view behind the transparent opening by the falling of the front end of the latch when released from its rest on the armature by the attraction of said armature to the magnet.
- a vertical rod, G which passes through the bottom of the box up by the side of the latch, and is provided with a pin on one side, which, when the rod is pushed up, lifts the latch, thereby releasing the armature, whichvfalls back by its own gravity, and again allows the latch to rest thereon.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Emergency Lowering Means (AREA)
Description
Willi/64am Il? vena L.
UNITED STATES PATENT OFFICE.v
WILLIAM H. CROWELL, OF MAPLE CITY, MICHIGAN, ASSIGNOR OF ONE- I HALF HIS RIGHT TO H. A. CROSSLEY, OF CLEVELAND, OHIO.
IMPROVEMENT IN ELECTRO-MAGNETIC ANNUNCIATORS.
Specification forming part of Letters Patent No. 173,447, dated February 15, 1876; application filed Toall whom it may concern so as to latch and hold or retain the armature in a perpendicular position by dropping so as to bring-a hook on the end ot' said latch down in front of the armature 5 the said latch also having a numbered plate attached to the forward end, which is brought into view through a transparent place inithe glass front by the dropping ofthe said latch; the above-named armature being hung in its frame with a stop so as to keep it from direct contact with the magnet. The aforesaid latch is again raised by means of a vertically-sliding rod carrying a pin which lifts the latch, and, when thus lifted, allows the armature to fallback by its own gravity then the end or hook of the -lat'chv rests on the top of the armature again,
concealing the number from view.
To enable others to fully understand the construction and operation of my invention, l proceed to describe the same in'detail, with the aid of the accompanying drawing, in which- Figure 1 is a front view. Fig. 2 is a verti-l cal section, showing the working parts.
A, Figures 1 and 2, is the box orcase ofthe annuuciator, having a glass fron t, with transparent places for showing the numbers. B is\a cast-metal frame, secured to the back of said box, which supports the electro-magnets by the cores C, and also in the front end of October 18, 1875.
which is pivoted the armature D. The lower endv of said armature has a lug or projection, d, which strikes against the frame and thus prevents the armature from coming in contact with the cores C when the electrical circuit from the battery is closed. E is a latch lying above the magnets and pivoted at the y rear end to a post, e, fixed in the frame B, the front end being bent downward in the form of a hook, which rests on the top edge of the armature D when the armature is away from the magnet, which hook, however, holds the armature up after the circuit is broken. To the front end of said latch E is attached a numbered plate, F, which is brought into view behind the transparent opening by the falling of the front end of the latch when released from its rest on the armature by the attraction of said armature to the magnet.
'Io again raise the latch a vertical rod, G, is provided, which passes through the bottom of the box up by the side of the latch, and is provided with a pin on one side, which, when the rod is pushed up, lifts the latch, thereby releasing the armature, whichvfalls back by its own gravity, and again allows the latch to rest thereon.
Havin g described my invention, I claim- The abovefdescribed electromagnetic annunciator, consisting of the frame B, magnet C, armature D, having a stop, d, the rod G and plate-bearing lever E,which is pivoted at its rear end'to a post, e, and arranged above and to rest upon the armature, and be operated thereby, and by the rod G, substantially as shown. y
W. H. CROWELL. Witnesses:
ANDREW SQUIRE, GEO. W, TIBBETTs.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US173447A true US173447A (en) | 1876-02-15 |
Family
ID=2242854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US173447D Expired - Lifetime US173447A (en) | Improvement in electro-magnetic annunciators |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US173447A (en) |
-
0
- US US173447D patent/US173447A/en not_active Expired - Lifetime
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