US2229592A - Electric switch - Google Patents

Electric switch Download PDF

Info

Publication number
US2229592A
US2229592A US212554A US21255438A US2229592A US 2229592 A US2229592 A US 2229592A US 212554 A US212554 A US 212554A US 21255438 A US21255438 A US 21255438A US 2229592 A US2229592 A US 2229592A
Authority
US
United States
Prior art keywords
pointer
contact
speedometer
dial
switch
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
US212554A
Inventor
Rosenfeld Albert
Original Assignee
Rosenfeld Albert
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rosenfeld Albert filed Critical Rosenfeld Albert
Priority to US212554A priority Critical patent/US2229592A/en
Application granted granted Critical
Publication of US2229592A publication Critical patent/US2229592A/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/02Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/16Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift

Description

Jan. 21, 1941. ROSENFELD 2,229,592

ELECTRIC SWITCH Filed June 8, 1938 2 .52 bertEosenfeZd INVENTOR ATTORNEYS Patented Jan. 21, 1941 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to an electric switch for speed alarms adapted for use on automobiles to warn the driver when the speed of his car has exceeded a predetermined maximum.

A further object is to provide, in a warning signal system of this character, a resilient switch contact assembled with the speedometer pointer and adapted to make good electrical connection with an adjustably mounted switch contact on the speedometer dial so that the device will operate effectively when subjected to vibration and shocks and jars of rough conditions of service.

A further object is to provide a device of this character which will be formed of a few strong simple and durable parts, which will be inexpensive to manufacture and which may be easily installed on used cars as well as on cars in the process of manufacture.

With the above and other objects in view the invention consists of certain novel details of construction and combinations of parts hereinafter fully described and claimed, it being understood that various modifications may be resorted to within the scope of the appended claim without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawing forming part of this specification,

Figure 1 is a front elevation of a speedometer equipped with switch contacts constructed in accordance with the invention.

Figure 2 is a fragmentary cross sectional view of the speedometer shown in Figure 1 and showing the switch contacts in elevation.

Figure 3 is a detail cross sectional view showing the resilient contact carried by the pointer in end elevation.

Figure 4 is a bottom plan view of the resilient contact carried by the pointer.

Figure 5 is a cross sectional view of the speedometer dial and showing the contacts in circuit closing position.

Figure 6 is a cross sectional view taken on the line 6-45 of Figure 1 showing the adjusting mechanism of the adjustable contact.

Figure 7 is a cross sectional view taken on the line l'l of Figure 1 showing one of the binding posts of the adjustable switch contact.

Referring now to the drawing in which like characters of reference designate similar parts in the various views, 4 designates a speedometer having a dial 5 and a pointer 6, these parts being conventional.

In carrying out the invention an arcuate slot 1 is formed in the dial concentric with the speed adjusting bolt II is passed through the plate 9 10 and through the slot 1, as best shown in Figures 5 and 6.

For adjusting the contact a segment gear I2 is pivoted between collars l3 on the shaft 8 of the pointer. .A spacing sleeve [4 is mounted on 15 the bolt between the base plate 9 and the segment gear. The segment gear meshes with a pinion l 5 which projects through a slot in the top of the speedometer housing and which is fixed to a shaft 16. The shaft is journaled in openings l1 formed in a housing 18 which is mounted on top of the speedometer housing. The shaft is equipped with a knob I9 through the medium of which the pinion may be rotated to swing the segment gear which latter carries with it the adjustable contact to any adjusted position longitudinally of the slot 1.

Each conductor bar I0 is provided with a respective binding post 20 which extends through the slot I and is insulated therefrom by a sleeve 2| of insulating material. The binding posts are connected to flexible and extensible insulated circuit wires 22 which are anchored at the outer ends to the rear face of the dial by'screws 23. The circuit Wires are connected in series with the vehicle battery 24 and an alarm device 25 such as a bell.

The movable switch contact is fixed to the pointer 6 of the speedometer and comprises a 4 preferably formed of bolts are passed through the ends of the mica strips and clamp the strips together. A jumper Wire 29 connects the bolts together and bridges the conductor bars [0 of the adjustable switch contact when the contact points 28 are in circuit closing position, as best shown in Figure 5.

The jumper wire 29 is formed of spring material to hold the mica strips 26 in arched form. The resiliency of the strips permits of the strips yielding as the contact points 28 pass onto and off of the bars [8 of the adjustable switch contact.

In operation assuming that the predetermined speed limit not to be exceeded is 45 miles, the base 9 of the adjustable switch contact is set at the 45 mile speed indicating position on the dial. As the speed of the vehicle increases and reaches the 45 mile limit the pointer will be in a position to dispose the contact points 28 in circuit closing position upon the conductor bars Ill and close the alarm circuit at this point to energize the alarm bell. Thus the operator need not change the focus of his eyes when driving, to read the speedometer at close range, as each time the predetermined speed limit is reached the warning bell will sound.

It is not intended to limit the application of the invention to use on automobiles since the scope of the invention extends to any machine or apparatus for indicating when certain predetermined limits have been passed, such as pressure, as in a boiler, or of speed ina locomotive or airplane as well as for tanks such as used for storage of oil in heating systems, and other apparatus.

From the above description it is thought that the construction and operation of the invention will be fully understood without further explanation.

What is claimed is:

In switch mechanism, a dial, a pair of spaced switch contacts adjustable as a unit in a directioncircumferentially of the dial, a pointer on the dial swingable in a path to pass over the fixed contacts, a pair of transversely disposed mica strips secured at their centers to the pointer on opposite sides thereof, a pair of contact bolts passed through the ends of the strips and clamping the strips together, and a wire connected at the ends to the bolts and. insulated from the pointer by said strips, said wire and said bolts forming a bridging switch contact co-acting with the fixed contacts in circuit closing position when the pointer arrives at a position between the fixed contacts.

ALBERT ROSENFELD.

US212554A 1938-06-08 1938-06-08 Electric switch Expired - Lifetime US2229592A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US212554A US2229592A (en) 1938-06-08 1938-06-08 Electric switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US212554A US2229592A (en) 1938-06-08 1938-06-08 Electric switch

Publications (1)

Publication Number Publication Date
US2229592A true US2229592A (en) 1941-01-21

Family

ID=22791507

Family Applications (1)

Application Number Title Priority Date Filing Date
US212554A Expired - Lifetime US2229592A (en) 1938-06-08 1938-06-08 Electric switch

Country Status (1)

Country Link
US (1) US2229592A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2433895A (en) * 1944-12-30 1948-01-06 Fairhurst John Speedometer switch
US2839626A (en) * 1955-09-21 1958-06-17 Lewis Eng Co Adjustable meter contact
US20060067812A1 (en) * 2004-09-27 2006-03-30 Roy Studebaker Louvered fan grille for a shrouded floor drying fan

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2433895A (en) * 1944-12-30 1948-01-06 Fairhurst John Speedometer switch
US2839626A (en) * 1955-09-21 1958-06-17 Lewis Eng Co Adjustable meter contact
US20060067812A1 (en) * 2004-09-27 2006-03-30 Roy Studebaker Louvered fan grille for a shrouded floor drying fan
US7971369B2 (en) 2004-09-27 2011-07-05 Roy Studebaker Shrouded floor drying fan

Similar Documents

Publication Publication Date Title
US2802204A (en) Acceleration operated switch
US2639342A (en) Low tire indicator
US3044043A (en) Vehicle signalling apparatus for warning of approaching road conditions
US2799843A (en) Motor vehicle signal device
EP0447730B1 (en) Vehicle brake warning device
SE392076B (en) Procedure for effektoverforing and signal transmission from a remote electrically supervised circuit in a vehicle's electrical kretsnet Along with electrically monitored circuit for vehicles for conducting ...
US3014199A (en) Siren actuated warning device for automobiles
US2691114A (en) Generator brush with condition indicator
US3478311A (en) Automobile parking accident alarm system
US2259614A (en) Clearance indicator for automobiles
DE1905194A1 (en) Switching device for direction indicators and warning signal generator in motor vehicles
US4043076A (en) Electrical signal mechanism actuated in response to rotation about any of three axes
US4037192A (en) Flat tire indicating device
US2482630A (en) Automobile curb guide
US2667602A (en) Vehicle directional signal system
GB2040092A (en) Automatic alarm system for car backing
US2854537A (en) Magnetic circuit breaker for automotive electric circuits
US1689075A (en) Traffic-light control
US2547199A (en) Electric signal switch
US2270687A (en) Curb indicator signal
US3206116A (en) Monitoring device for automobile operation
US4232288A (en) Vehicle alarm
US1579928A (en) Automobile bumper
US3129416A (en) Speed alarm for dial speedometer
US2407122A (en) Portable burglar alarm