公开(公告)号：GB190325146A

公开(公告)日：1904-11-17

申请号：GB190325146D

申请日：1903-11-18

Applicant: LAIRD GEORGE ,  TODD JOHN PERCIVAL

Inventor： LAIRD GEORGE ,  TODD JOHN PERCIVAL

Abstract: 25,146. Laird, G., and Todd, J. P. Nov. 18. Motors, controlling.-Relates to the operation of motor controllers having a braking position and also separate reversing and controlling drums, the controller being operated by a single lever. The reversing-drum is adapted to be connected to the operating-lever by pins or plungers, so that, when in the 'off' position, it can be moved in either direction, the operating-lever being moved in one direction for 'control' whether the motor is running in the forward or backward direction. Figs. 1 and 2 shows one arrangement, in which the operating- lever 5 is mounted on the controlling- drum shaft 4, and is provided with two plungers 7, 8, either one of which can be depressed, when the switch is in the 'off' position, and caused to engage with a groove 3 in the head 2 of the reversing-drum. The plungers have enlarged heads 9 which are admitted through holes in the top of the controller casing, and the shanks of the plungers can slide in a groove 13 or 14 in the casing when the handle is moved. The plungers are carried by a pivoted lever 15 operated by a push 21. By manipulating the push 21 the handle 19 is moved in the Fame direction for 'control,' although the reversing-drum may be set for forward or backward running. In a modified form, Fig. 4, the reversing-drum 22 is loose on the shaft 4, and is operated from the grooved head or plate 27 by geared quadrants. In another modification, the lever is fitted with two handles, in each of which is a push similar to 21. Each push controls one of the plungers. In the form shown in Fig. 9, one plunger only is used, but is fitted in a sliding carrier 35, which may be moved into the position shown in dotted lines when it is desired to turn the reversing-drum in the opposite direction. In another modification, the carrier is connected to the handle which slides in a groove in the lever. In this arrangement, the plunger is operated by a push in the handle. In all the arrangements, a lost motion is provided for the reversing-drum, so that, after it has been moved, the operating-handle can continue its movement in the same direction without interfering with the reversing-drum.

公开(公告)号：GB190403000A

公开(公告)日：1905-02-02

申请号：GB190403000D

申请日：1904-02-06

Applicant: LAIRD GEORGE ,  TODD JOHN PERCIVAL

Inventor： LAIRD GEORGE ,  TODD JOHN PERCIVAL

公开(公告)号：GB191013947A

公开(公告)日：1911-05-18

申请号：GB191013947D

申请日：1910-06-08

Applicant: TODD JOHN PERCIVAL

Inventor： TODD JOHN PERCIVAL

IPC: B61H7/02

Abstract: 13,947. Todd, J. P. June 8. Skid.-Track brakes for tram-cars &c. provided with maximum-traction trucks are arranged on each side of the driving-wheels so that the whole weight of the vehicle may be brought on to the rail shoes. An arrangement of mechanically-operated track brakes is shown in the Figure. The brake shoes 5, 19 are disposed at each side of the driving-wheel 2, or the shoe 5 may be placed beyond the pony-wheel 3. The weight of the vehicle acts along the line indicated by 11. The shoe 5, carried by a rod 6, is connected to a lever 8 pivoted at 9 in the line 11. When a pull is applied to the rod 16, the bell-crank lever 13, 14 turns first about the point 12, and the shoe 19 is thrust down through the rod 18. As soon as the shoe 19 contacts with the rail, the lever 13, 14 turns about 17 and the end 12 of the lever 8 is raised, thus depressing the end 7 and applying the shoe 5. One or other of the shoes may be operated electro-magnetically.

公开(公告)号：GB191007048A

公开(公告)日：1910-12-01

申请号：GB191007048D

申请日：1910-03-21

Applicant: TODD JOHN PERCIVAL

Inventor： TODD JOHN PERCIVAL

IPC: B61H7/08

Abstract: 7048. Todd, J. P. March 21. Electro magnets.-The coils and leads 'of magnetic brakes for tramway and other, vehicles are completely enclosed in cases which protect them from injury by mud, water, dust, or the like. In the brake shown, consistingof two side plates 1, 2 connected by transverse cores 5, each coil 10 is enclosed in a spun or drawn metal casing 13 consisting of two parts wbich are placed over the coil and soldered or brazed together. The leads 14 are sled to shifting-boxes '16 formed on cast casings 15, which are brazed or riveted to the casings 13. The casings 13, 15 may consist of a single casting formed in two parts which are screwed or sweated together.