US1019895A - Head-lamp. - Google Patents

Description

H. M. HA'YS l W. R. RosBNBAUM.

HEADLAMP.

APPLIOATION FILED MAY 5, 1911.

Patented Mar. 12, 1912.'

this recess is convex, being substantially concentric with the center of the ball-andsocket joint. Accordingly, the lamp-socket' the projection 22 and the screw 25 constitut-' ing,l pivots for this purpose. As rotation of the lamp-socket about its longitudinal axis is unnecessary and undesirable, the recess in the screw 26 is made narrow in one direction, while elongated in the direction of the longitudinal axis of the lamp-socket.

The connections just described, between the lamp-socket and the-battery-case, consti'- tute electrical as well as mechanical connections. rlhe screw 26, as shown in Fig. 1,`is insulated from the head 21, and its shank is engaged by a second screw 27 also insulated from the lamp-socket. The latter screw constitutes a contact-device engaged .by the insulated contact 15 of the electric lamp, while the lamp-socket constitutes the other connection, in the usual manner. The battery 5 is provided with the usual springterminals and 34, of which the latter engages the inner surface of the battery-case. The current is thus conducted from the battery through the lamp-casing and the projection 22 to the lampesocket, and thus to the base of the lamp. The current returns from the lamp through the terminal l5 and the screws 27'and 26 to the screw 25 and the arm 24. Between 'the latter part, however, and the other battery-terminal '33 a switch is interposed, by which the current may be turned on or off from the lamp. For this purpose 'the arm 2l is formed on the end of a. conducting-strip which is insulated from the bar 23, but is fixed thereto bj' screv. i. 28. The outer end 29 of the conducting-strip is bent upwardly at the end of the casing, and

a switch-arm 80 is pivoted thereon by means of a screw 3l. rl."his switch-arm coperates with a fixed contact-stud 32, which is engaged by the battery-contact 33, thus completing the circuit.. To disconnect the lamp from the battery theswitch-arm is swung aside out of engagement with 'the contactstud 32, so as to rest against the insulatingplate ll. This switch is so located that it may be conveniently operated while the lamp is in position on the head.

To prevent accidental Contact and a resulting short-circuit between the lamp- 1 socket andthe arm 24' when the socket is swung to an extreme position, a Ushape`d guard 35 is xed on the bar 23 and depends at each side of the arm.

For most purposes the lamp is employed as shown in Fig. 3, the battery-case being supported upon 'the forehead with the headpiece 6 restingr flat against the face, and thus supporting,r the battery firmly and without discomfort to the user. In this position of the device the lamp may be adjusted to l project its rays forward from aY point between, and substantially on the level of, the eyes, so that the ways approximate as nearly as possible to the line of sight. ingly, the lamp may be used to great ad vantage in inspecting deep cavities, such the throat, or the aural or nasal passages.

The lamp may also be employed, in opti cal work, by mounting it upon the head oi' the patient, with the battery-box at one side of the head, andthe electric lamp swung into' the position of Fig. l. ln this manner the head-lamp may be employed to project Yits rays against the mirror of an ophthalrnoscope upon the head of the oculist, and

thence intp the patients eyes in the usual.

manner.

When the lamp is not in use it is adapted to be folded into a very small compass. .fit

.and illustrated in the accompanying drawings, but may be embodied in various forms within the nature of the invention, as it is defined in the following claims. A

lVe claim e l. A headlamp having, in combination, a battery-case provided with a head-piece adapted to rest against and conforming to the users head, means for securing the battery-case in place on the head, and an elec- ,tric lamp carried by the battery-case and connected therewith by 'a universal joint comprising both mechanical and electrical connections, whereby the lamp may be moved to vary the direction in which the light is projected.

2. A head-lamp having, in combinatioma fiat battery-case provided with a concave head-piece adapted to rest against and conform to the users head, means for securing the battery-case upon the forehead, and an electric lamp provided with a condensinglens and carried by the battery-case, the lamp being connected with the bottom of the case by a joint comprising both mechanical and electrical connections, so as to depend therefrom into a position between the eyes of the user, and being movable into position to direct the light in the line of vision.

3. A head-lamp having. in combination.y a liat, elongated battery-ease, means for securing the battery-case upon the forehead of the user, and an electric lamp carried by the battery-case and connected therewith, substantially the middle of the lower edge of the case, by means of a joint adapted to permit the lamp to be swung either into the AccordI4 q.:

plane of the battery-case or into a position normal to. said'plane. A 4. A head-lamp having, in combination, a-

batt'cry-casq means for securing the battery-cas'e upon the h'ead of the user, anelectnx-1c lam carried by`A the battery-case and `connecte therewith, at sul'istantially the middle ofthe case, by a universal joint comprising both mechanical'and electrical connections between the case and the lamp, and a switch at one end of the battery-case connected in series with the lamp through said joint. t

5. head-lamp having, in combination, a battery-case, an electric lamp, and a universal -jornt connecting the battery-case andthe 1 lamp and comprisingr cooperatingr ball-audsocket members, one of said members being connected with the battery -case and the other with the lamp, and the latter member beingr provided with a recessed surface substantially concentric with the ball-and-socket joint, and a resilient meml r fixed to the battery-case and engaging said surface so as to holdthe ball-and-socket members resiliently in engagement while permitting relative movements thereof to adjust the position of the lamp.

6. A. head-lamp having, in combination, an electric-lamp, a lamp-socket, in winch the lamp is mounted, proyl'ded with a head haw.

ing a rounded recess, a battery-case having a rounded'` projection 'engaging said recess, ia

contact-member mounted upon, but-insulated from, said head and electrically connected :with a terminal of the lamp, said contact- 'memberbeing provided wlth a surface ysubstantially concentric with said recess and projection, and a resilient member mounted on the battery-case and yieldingly engaging said surface so as to make electrical connection therewith and also maintain the yrecess yand projection in engagement, the projection and theresilient member being insulated from each other, and a battery in the battery-case of which the terminals are electrically connected-with the projection and the resilient member, respectively.

7. A head-lamp having, 'in combination,

an electric lamjna lamp-socket in which the ease and connected, throughthe beforementioned parts, with the electric lamp. HAROLD M. HAYS.

` WILLTAM R. ROSENABAUM; i.

` Witnesses for Harold M. Hays:- JAarEs R. VALENTINE, THos.l TIGHE.

. Witnesses for William R. Rosenbaum:

D. GURNEE, FARNUM F. DonsnY.

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