US425078A - Electrical annunciator-drop - Google Patents
Electrical annunciator-drop Download PDFInfo
- Publication number
- US425078A US425078A US425078DA US425078A US 425078 A US425078 A US 425078A US 425078D A US425078D A US 425078DA US 425078 A US425078 A US 425078A
- Authority
- US
- United States
- Prior art keywords
- drop
- armature
- shutter
- annunciator
- electrical
- 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
- 230000036633 rest Effects 0.000 description 2
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
Definitions
- the object of my invention is to provide an electrical annunciator-drop particularly adapted for use in the central office of a telephonic exchange.
- Figure 1 is a side view of my invention.
- Fig. 2 is a top view of the same.
- Fig. 3 is a front end view with the shutter-drop down, and
- Fig. 4 is a rear end view.
- A is the base on which my annunciator rests
- B is the base-bar of the annunciator.
- C is the shutter-drop provided with the metallic pin a, which is firmly soldered into the shutter-drop.
- the post D is the adj usting-post on the front end of the annunciator, which is provided near its upper end with a circular slot at, through which the armature E passes.
- the post D is also provided with the adj Listing-screws b and d, which operate through its upper and bent portion.
- the adjusting-screw 6, near the lower portion of the post D, is used for adjusting the shutter-drop O in a perpendicular position or at any desired angle.
- the armature E is provided with the spring F, which is sc"ewed to the upper side of the armature.
- G is a Y-shaped post at the rear end of the base-bar B, to which the rear end of the armature E is pivoted.
- the spools H and H form the coils of the electro-magnet.
- the binding-posts I andl are connected, respectively, with the base-bar B and the 10- cal-battery spring K.
- the front end of the armature E is notched on its upper side at g, and with this engages the shutter-drop 0 when it is in an uprightposition.
- the object of the adj llStlDg-SCYBWS b and d is obvioust0 regulate the armature E in its relation to the shutterdrop 0 and to the electro-magnet.
- the armature can be adapted to the electric currents as received from longer or shorter lines.
- the armature E provided with the spring F and the shutter-drop O, in combination with the post D, provided with the adj listing-screw e, to regulate the position of the shutter-drop O, the adjusting-screws b and d, the post G, and the electro-magnet H H, substantially as shown and described, and for the purposes herein set forth. 7 a
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Structure Of Telephone Exchanges (AREA)
Description
(No Model.)
M HYNES ELECTRICAL ANNUNGIATOR DROP.
No. 425,078. PatehtedApr. s 1890.
' INVENTOR.
ATTORNEY.
gamma? 7fiM/ UNITED STATES PATENT ()FFICE.
MARTIN I-IYNES, OF BOSTON, MASSACHUSETTS.
ELECTRICAL ANNUNClATOR-DROP.
SPECIFICATION forming part of Letters Patent No. 425,078, dated April 8, 1890.
Application filed December 14, 1882. Serial No. 79,255. (No model.)
To aZZ whom it may concern.-
Be it known that I, MARTIN HYNES, of the city of Boston, county of Suffolk, and State of Massachusetts, have invented certain new and useful Improvements in Electrical Annunciator-Drops for Telephonic Signals; and
I do hereby declare that the following is afull and correct description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon which form a part of this specification.
Similar letters of reference are used to indicate like parts in all the drawings accompanying this specification. p
The object of my invention is to provide an electrical annunciator-drop particularly adapted for use in the central office of a telephonic exchange.
Figure 1 is a side view of my invention. Fig. 2 is a top view of the same. Fig. 3 is a front end view with the shutter-drop down, and Fig. 4 is a rear end view.
A is the base on which my annunciator rests, and B is the base-bar of the annunciator.
C is the shutter-drop provided with the metallic pin a, which is firmly soldered into the shutter-drop.
D is the adj usting-post on the front end of the annunciator, which is provided near its upper end with a circular slot at, through which the armature E passes. The post D is also provided with the adj Listing-screws b and d, which operate through its upper and bent portion.
The adjusting-screw 6, near the lower portion of the post D, is used for adjusting the shutter-drop O in a perpendicular position or at any desired angle.
The armature E is provided with the spring F, which is sc"ewed to the upper side of the armature.
G is a Y-shaped post at the rear end of the base-bar B, to which the rear end of the armature E is pivoted.
The spools H and H form the coils of the electro-magnet.
The binding-posts I andl are connected, respectively, with the base-bar B and the 10- cal-battery spring K.
The front end of the armature E is notched on its upper side at g, and with this engages the shutter-drop 0 when it is in an uprightposition.
The object of the adj llStlDg-SCYBWS b and d is obvioust0 regulate the armature E in its relation to the shutterdrop 0 and to the electro-magnet. By means of these adjusting screws the armature can be adapted to the electric currents as received from longer or shorter lines.
When a subscriber signals the central office of the telephonic exchange, the circuit through the annuuciator is closed. This causes the armature to vibrate, and thus releases the shutter-drop, which immediately falls down. In falling down the metallic pin 0 of the shutterdrop comes in contact with the local-battery spring K, which causes the bell to ring, and thus gives notice to the central office that a subscriber has called, and the number on the now-exposed face of the shutter-drop indicates the source of the call.
Having now fully described my invention, what I claim, and desire to secure by Letters Patent, is-
The armature E, provided with the spring F and the shutter-drop O, in combination with the post D, provided with the adj listing-screw e, to regulate the position of the shutter-drop O, the adjusting-screws b and d, the post G, and the electro-magnet H H, substantially as shown and described, and for the purposes herein set forth. 7 a
In testimony that I claim the foregoing I have hereunto set my hand this 9th day of December, 1882.
MARTIN HYNES. Witnesses:
J. M00. PERKINS, SAMUEL W. MCDANIEL.
Publications (1)
Publication Number | Publication Date |
---|---|
US425078A true US425078A (en) | 1890-04-08 |
Family
ID=2493992
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US425078D Expired - Lifetime US425078A (en) | Electrical annunciator-drop |
Country Status (1)
Country | Link |
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US (1) | US425078A (en) |
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0
- US US425078D patent/US425078A/en not_active Expired - Lifetime
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